From 10824eaf2ea46e3be7e4ac29a9ae6de11ec21093 Mon Sep 17 00:00:00 2001
From: Alakesh Haloi <alakeshh@amazon.com>
Date: Fri, 23 Jul 2021 15:10:08 -0700
Subject: [PATCH 1/3] remove go 1.13 from containerd

We no longer would need go 1.13.x for moby/containerd compatibility with
containerd moving to 1.16.x

Signed-off-by: Alakesh Haloi <alakeshh@amazon.com>
---
 .github/workflows/ci.yml | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index ff03a03b7..f9ade0e8c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -235,10 +235,6 @@ jobs:
       matrix:
         os: [ubuntu-18.04, macos-10.15, windows-2019]
         go-version: ['1.16.6']
-        include:
-          # Go 1.13.x is still used by Docker/Moby
-          - go-version: '1.13.x'
-            os: ubuntu-18.04
 
     steps:
       - uses: actions/setup-go@v2

From 3597ac859d3fc79f250e5d0f1664fb9db9143898 Mon Sep 17 00:00:00 2001
From: Alakesh Haloi <alakeshh@amazon.com>
Date: Tue, 6 Jul 2021 11:25:03 -0700
Subject: [PATCH 2/3] [otel-tracing] Initial opentelemetry support

Add basic intiialization of opentelemetry including minimum support to
be able to read open telemetry config from config.toml and initialize
exporter. Tracer is initialized and ready to be be used for creating
spans, sub spans etc. With no opentelemetry configuration enabled in
config file, this patch is a no-op.

Basic config stub to be added to use opentelemetry is to add following
in config.toml. We use otlp exporter with default port 4317.

[otel]
  exporter_name = "otlp"
  exporter_endpoint = "0.0.0.1:4317"

otel-collector binary needs to run listening at the same port.

Signed-off-by: Alakesh Haloi <alakeshh@amazon.com>
---
 cmd/containerd/command/main.go   |  19 ++++++
 services/server/config/config.go |  28 ++++++++
 services/server/server.go        |  12 +++-
 tracing/tracing.go               | 109 +++++++++++++++++++++++++++++++
 4 files changed, 166 insertions(+), 2 deletions(-)
 create mode 100644 tracing/tracing.go

diff --git a/cmd/containerd/command/main.go b/cmd/containerd/command/main.go
index ca6acfe39..21967a17b 100644
--- a/cmd/containerd/command/main.go
+++ b/cmd/containerd/command/main.go
@@ -34,10 +34,12 @@ import (
 	"github.com/containerd/containerd/services/server"
 	srvconfig "github.com/containerd/containerd/services/server/config"
 	"github.com/containerd/containerd/sys"
+	"github.com/containerd/containerd/tracing"
 	"github.com/containerd/containerd/version"
 	"github.com/pkg/errors"
 	"github.com/sirupsen/logrus"
 	"github.com/urfave/cli"
+	"go.opentelemetry.io/otel"
 	"google.golang.org/grpc/grpclog"
 )
 
@@ -130,6 +132,20 @@ can be used and modified as necessary as a custom configuration.`
 			return err
 		}
 
+		// Initialize OpenTelemetry tracing
+		shutdown, err := tracing.InitOpenTelemetry(config)
+		if err != nil {
+			errors.Wrap(err, "failed to initialize OpenTelemetry tracing")
+		}
+		if shutdown != nil {
+			defer shutdown()
+		}
+
+		// Get a tracer
+		ctrdTracer := otel.Tracer("containerd")
+		ctx, mainCtrdSpan := ctrdTracer.Start(ctx, "containerd-exporter")
+		defer mainCtrdSpan.End()
+
 		// Make sure top-level directories are created early.
 		if err := server.CreateTopLevelDirectories(config); err != nil {
 			return err
@@ -243,6 +259,9 @@ can be used and modified as necessary as a custom configuration.`
 func serve(ctx gocontext.Context, l net.Listener, serveFunc func(net.Listener) error) {
 	path := l.Addr().String()
 	log.G(ctx).WithField("address", path).Info("serving...")
+	serveSpan, ctx := tracing.StartSpan(ctx, l.Addr().String())
+	defer tracing.StopSpan(serveSpan)
+
 	go func() {
 		defer l.Close()
 		if err := serveFunc(l); err != nil {
diff --git a/services/server/config/config.go b/services/server/config/config.go
index f4b9f2ab9..5bf0cae13 100644
--- a/services/server/config/config.go
+++ b/services/server/config/config.go
@@ -67,6 +67,8 @@ type Config struct {
 	Timeouts map[string]string `toml:"timeouts"`
 	// Imports are additional file path list to config files that can overwrite main config file fields
 	Imports []string `toml:"imports"`
+	// OpenTelemetry configuration
+	OpenTelemetry OpenTelemetryConfig `toml:"otel"`
 
 	StreamProcessors map[string]StreamProcessor `toml:"stream_processors"`
 }
@@ -165,6 +167,14 @@ type ProxyPlugin struct {
 	Address string `toml:"address"`
 }
 
+// OpenTelemetryConfig provides open telemetry configuration
+type OpenTelemetryConfig struct {
+	ServiceName        string  `toml:"service_name"`
+	ExporterName       string  `toml:"exporter_name"`
+	ExporterEndpoint   string  `toml:"exporter_endpoint"`
+	TraceSamplingRatio float64 `toml:"trace_sampling_ratio"`
+}
+
 // BoltConfig defines the configuration values for the bolt plugin, which is
 // loaded here, rather than back registered in the metadata package.
 type BoltConfig struct {
@@ -203,6 +213,24 @@ func (bc *BoltConfig) Validate() error {
 	}
 }
 
+const (
+	// ExporterTypeOTLP represents the open telemetry exporter OTLP
+	ExporterTypeOTLP = "otlp"
+)
+
+// Validate OpenTelemetry config
+func (cfg *OpenTelemetryConfig) Validate() error {
+	switch cfg.ExporterName {
+	case ExporterTypeOTLP:
+		if cfg.ServiceName == "" {
+			return errors.Wrapf(errdefs.ErrInvalidArgument, "missing service name in config %+v", cfg)
+		}
+		return nil
+	default:
+		return errors.Wrapf(errdefs.ErrInvalidArgument, "unsupported exporter: %+v", cfg)
+	}
+}
+
 // Decode unmarshals a plugin specific configuration by plugin id
 func (c *Config) Decode(p *plugin.Registration) (interface{}, error) {
 	id := p.URI()
diff --git a/services/server/server.go b/services/server/server.go
index 444e64f59..bc3c025f2 100644
--- a/services/server/server.go
+++ b/services/server/server.go
@@ -51,9 +51,11 @@ import (
 	"github.com/containerd/containerd/sys"
 	"github.com/containerd/ttrpc"
 	metrics "github.com/docker/go-metrics"
+	grpc_middleware "github.com/grpc-ecosystem/go-grpc-middleware"
 	grpc_prometheus "github.com/grpc-ecosystem/go-grpc-prometheus"
 	"github.com/pkg/errors"
 	bolt "go.etcd.io/bbolt"
+	"go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/backoff"
 	"google.golang.org/grpc/credentials"
@@ -98,8 +100,14 @@ func New(ctx context.Context, config *srvconfig.Config) (*Server, error) {
 	}
 
 	serverOpts := []grpc.ServerOption{
-		grpc.UnaryInterceptor(grpc_prometheus.UnaryServerInterceptor),
-		grpc.StreamInterceptor(grpc_prometheus.StreamServerInterceptor),
+		grpc.StreamInterceptor(grpc_middleware.ChainStreamServer(
+			otelgrpc.StreamServerInterceptor(),
+			grpc.StreamServerInterceptor(grpc_prometheus.StreamServerInterceptor),
+		)),
+		grpc.UnaryInterceptor(grpc_middleware.ChainUnaryServer(
+			otelgrpc.UnaryServerInterceptor(),
+			grpc.UnaryServerInterceptor(grpc_prometheus.UnaryServerInterceptor),
+		)),
 	}
 	if config.GRPC.MaxRecvMsgSize > 0 {
 		serverOpts = append(serverOpts, grpc.MaxRecvMsgSize(config.GRPC.MaxRecvMsgSize))
diff --git a/tracing/tracing.go b/tracing/tracing.go
new file mode 100644
index 000000000..d95ea7da6
--- /dev/null
+++ b/tracing/tracing.go
@@ -0,0 +1,109 @@
+/*
+   Copyright The containerd Authors.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
+package tracing
+
+import (
+	"context"
+
+	srvconfig "github.com/containerd/containerd/services/server/config"
+	"github.com/pkg/errors"
+	"github.com/sirupsen/logrus"
+	"go.opentelemetry.io/otel"
+	"go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc"
+	"go.opentelemetry.io/otel/propagation"
+	"go.opentelemetry.io/otel/sdk/resource"
+	sdktrace "go.opentelemetry.io/otel/sdk/trace"
+	semconv "go.opentelemetry.io/otel/semconv/v1.4.0"
+	"go.opentelemetry.io/otel/trace"
+	"google.golang.org/grpc"
+)
+
+// InitOpenTelemetry reads config and initializes otel middleware, sets the exporter
+// propagator and global tracer provider
+func InitOpenTelemetry(config *srvconfig.Config) (func(), error) {
+	ctx := context.Background()
+
+	// Check if tracing is configured
+	if config.OpenTelemetry == (srvconfig.OpenTelemetryConfig{}) {
+		logrus.Info("OpenTelemetry configuration not found, tracing is disabled")
+		return nil, nil
+	}
+
+	// Validate configuration
+	if err := config.OpenTelemetry.Validate(); err != nil {
+		return nil, errors.Wrap(err, "invalid open telemetry configuration")
+	}
+
+	res, err := resource.New(ctx,
+		resource.WithAttributes(
+			// Service name used to displace traces in backends
+			semconv.ServiceNameKey.String(config.OpenTelemetry.ServiceName),
+		),
+	)
+	if err != nil {
+		return nil, errors.Wrap(err, "failed to create resource")
+	}
+
+	// Configure OTLP trace exporter and set it up to connect to OpenTelemetry collector
+	// running on a local host.
+	ctrdTraceExporter, err := otlptracegrpc.New(ctx,
+		otlptracegrpc.WithEndpoint(config.OpenTelemetry.ExporterEndpoint),
+		otlptracegrpc.WithDialOption(grpc.WithBlock()),
+	)
+	if err != nil {
+		return nil, errors.Wrap(err, "failed to create trace exporter")
+	}
+
+	// Register the trace exporter with a TracerProvider, using a batch span
+	// process to aggregate spans before export.
+	ctrdBatchSpanProcessor := sdktrace.NewBatchSpanProcessor(ctrdTraceExporter)
+	ctrdTracerProvider := sdktrace.NewTracerProvider(
+		// We use TraceIDRatioBased sampling. Ratio read from config translated into following
+		// if sampling ratio < 0 it is interpreted as 0. If ratio >= 1, it will always sample.
+		sdktrace.WithSampler(sdktrace.TraceIDRatioBased(config.OpenTelemetry.TraceSamplingRatio)),
+		sdktrace.WithResource(res),
+		sdktrace.WithSpanProcessor(ctrdBatchSpanProcessor),
+	)
+	otel.SetTracerProvider(ctrdTracerProvider)
+
+	// set global propagator to tracecontext
+	otel.SetTextMapPropagator(propagation.TraceContext{})
+
+	return func() {
+		// Shutdown will flush any remaining spans and shut down the exporter.
+		err := ctrdTracerProvider.Shutdown(ctx)
+		if err != nil {
+			logrus.WithError(err).Errorf("failed to shutdown TracerProvider")
+		}
+	}, nil
+}
+
+// StartSpan starts child span in a context.
+func StartSpan(ctx context.Context, opName string, opts ...trace.SpanStartOption) (trace.Span, context.Context) {
+	parentSpan := trace.SpanFromContext(ctx)
+	tracer := trace.NewNoopTracerProvider().Tracer("")
+	if parentSpan.SpanContext().IsValid() {
+		tracer = parentSpan.TracerProvider().Tracer("")
+	}
+	ctx, span := tracer.Start(ctx, opName, opts...)
+	return span, ctx
+}
+
+// StopSpan ends the span specified
+func StopSpan(span trace.Span) {
+	span.End()
+}

From 3c5424454b60e775829c2e9b56be53a6af42fa90 Mon Sep 17 00:00:00 2001
From: Alakesh Haloi <alakeshh@amazon.com>
Date: Sat, 17 Jul 2021 23:28:41 -0700
Subject: [PATCH 3/3] [otel-tracing] vendor and go modules changes

This tracks all the vendor file changes and changes to go modules due
to OpenTelemetry support

Signed-off-by: Alakesh Haloi <alakeshh@amazon.com>
---
 go.mod                                        |   10 +-
 go.sum                                        |   44 +-
 integration/client/go.sum                     |   28 +-
 .../github.com/cenkalti/backoff/v4/.gitignore |   25 +
 .../cenkalti/backoff/v4/.travis.yml           |   10 +
 vendor/github.com/cenkalti/backoff/v4/LICENSE |   20 +
 .../github.com/cenkalti/backoff/v4/README.md  |   32 +
 .../github.com/cenkalti/backoff/v4/backoff.go |   66 +
 .../github.com/cenkalti/backoff/v4/context.go |   62 +
 .../cenkalti/backoff/v4/exponential.go        |  158 ++
 vendor/github.com/cenkalti/backoff/v4/go.mod  |    3 +
 .../github.com/cenkalti/backoff/v4/retry.go   |  112 ++
 .../github.com/cenkalti/backoff/v4/ticker.go  |   97 ++
 .../github.com/cenkalti/backoff/v4/timer.go   |   35 +
 .../github.com/cenkalti/backoff/v4/tries.go   |   38 +
 .../golang/protobuf/descriptor/descriptor.go  |  180 ++
 .../golang/protobuf/jsonpb/decode.go          |  524 ++++++
 .../golang/protobuf/jsonpb/encode.go          |  559 +++++++
 .../github.com/golang/protobuf/jsonpb/json.go |   69 +
 .../protoc-gen-go/descriptor/descriptor.pb.go |  200 +++
 .../protobuf/ptypes/wrappers/wrappers.pb.go   |   71 +
 vendor/github.com/google/go-cmp/cmp/path.go   |    2 +-
 .../google/go-cmp/cmp/report_slices.go        |  202 ++-
 .../go-grpc-middleware/.gitignore             |  202 +++
 .../go-grpc-middleware/.travis.yml            |   21 +
 .../go-grpc-middleware/CHANGELOG.md           |   30 +
 .../go-grpc-middleware/CONTRIBUTING.md        |   20 +
 .../go-grpc-middleware/Gopkg.lock             |  123 ++
 .../go-grpc-middleware/Gopkg.toml             |   35 +
 .../grpc-ecosystem/go-grpc-middleware/LICENSE |  201 +++
 .../go-grpc-middleware/README.md              |   84 +
 .../go-grpc-middleware/chain.go               |  183 +++
 .../grpc-ecosystem/go-grpc-middleware/doc.go  |   69 +
 .../go-grpc-middleware/makefile               |   16 +
 .../go-grpc-middleware/slack.png              |  Bin 0 -> 5088 bytes
 .../go-grpc-middleware/wrappers.go            |   29 +
 .../grpc-ecosystem/grpc-gateway/LICENSE.txt   |   27 +
 .../grpc-gateway/internal/BUILD.bazel         |   23 +
 .../grpc-gateway/internal/errors.pb.go        |  189 +++
 .../grpc-gateway/internal/errors.proto        |   26 +
 .../grpc-gateway/runtime/BUILD.bazel          |   85 +
 .../grpc-gateway/runtime/context.go           |  291 ++++
 .../grpc-gateway/runtime/convert.go           |  318 ++++
 .../grpc-gateway/runtime/doc.go               |    5 +
 .../grpc-gateway/runtime/errors.go            |  186 +++
 .../grpc-gateway/runtime/fieldmask.go         |   89 +
 .../grpc-gateway/runtime/handler.go           |  212 +++
 .../runtime/marshal_httpbodyproto.go          |   43 +
 .../grpc-gateway/runtime/marshal_json.go      |   45 +
 .../grpc-gateway/runtime/marshal_jsonpb.go    |  262 +++
 .../grpc-gateway/runtime/marshal_proto.go     |   62 +
 .../grpc-gateway/runtime/marshaler.go         |   55 +
 .../runtime/marshaler_registry.go             |   99 ++
 .../grpc-gateway/runtime/mux.go               |  300 ++++
 .../grpc-gateway/runtime/pattern.go           |  262 +++
 .../grpc-gateway/runtime/proto2_convert.go    |   80 +
 .../grpc-gateway/runtime/proto_errors.go      |  106 ++
 .../grpc-gateway/runtime/query.go             |  406 +++++
 .../grpc-gateway/utilities/BUILD.bazel        |   21 +
 .../grpc-gateway/utilities/doc.go             |    2 +
 .../grpc-gateway/utilities/pattern.go         |   22 +
 .../grpc-gateway/utilities/readerfactory.go   |   20 +
 .../grpc-gateway/utilities/trie.go            |  177 ++
 .../testify/assert/assertion_compare.go       |  172 +-
 .../testify/assert/assertion_format.go        |   97 ++
 .../testify/assert/assertion_forward.go       |  194 +++
 .../testify/assert/assertion_order.go         |   81 +
 .../stretchr/testify/assert/assertions.go     |   83 +-
 .../stretchr/testify/require/require.go       |  248 +++
 .../testify/require/require_forward.go        |  194 +++
 .../contrib/.gitattributes                    |    3 +
 vendor/go.opentelemetry.io/contrib/.gitignore |   13 +
 .../go.opentelemetry.io/contrib/.golangci.yml |   32 +
 .../go.opentelemetry.io/contrib/CHANGELOG.md  |  336 ++++
 vendor/go.opentelemetry.io/contrib/CODEOWNERS |   17 +
 .../contrib/CONTRIBUTING.md                   |  136 ++
 vendor/go.opentelemetry.io/contrib/LICENSE    |  201 +++
 vendor/go.opentelemetry.io/contrib/Makefile   |  203 +++
 vendor/go.opentelemetry.io/contrib/README.md  |   40 +
 .../go.opentelemetry.io/contrib/RELEASING.md  |   96 ++
 vendor/go.opentelemetry.io/contrib/contrib.go |   28 +
 vendor/go.opentelemetry.io/contrib/doc.go     |   20 +
 vendor/go.opentelemetry.io/contrib/go.mod     |    3 +
 vendor/go.opentelemetry.io/contrib/go.sum     |    0
 .../google.golang.org/grpc/otelgrpc/LICENSE   |  201 +++
 .../google.golang.org/grpc/otelgrpc/go.mod    |   16 +
 .../google.golang.org/grpc/otelgrpc/go.sum    |  121 ++
 .../grpc/otelgrpc/grpctrace.go                |  130 ++
 .../grpc/otelgrpc/interceptor.go              |  499 ++++++
 .../grpc/otelgrpc/semconv.go                  |   52 +
 .../contrib/pre_release.sh                    |  158 ++
 vendor/go.opentelemetry.io/contrib/tag.sh     |  178 ++
 .../go.opentelemetry.io/otel/.gitattributes   |    3 +
 vendor/go.opentelemetry.io/otel/.gitignore    |   20 +
 vendor/go.opentelemetry.io/otel/.gitmodules   |    3 +
 vendor/go.opentelemetry.io/otel/.golangci.yml |   32 +
 .../otel/.markdown-link.json                  |   16 +
 .../otel/.markdownlint.yaml                   |   29 +
 vendor/go.opentelemetry.io/otel/CHANGELOG.md  | 1448 +++++++++++++++++
 vendor/go.opentelemetry.io/otel/CODEOWNERS    |   17 +
 .../go.opentelemetry.io/otel/CONTRIBUTING.md  |  473 ++++++
 vendor/go.opentelemetry.io/otel/LICENSE       |  201 +++
 vendor/go.opentelemetry.io/otel/Makefile      |  183 +++
 vendor/go.opentelemetry.io/otel/README.md     |  106 ++
 vendor/go.opentelemetry.io/otel/RELEASING.md  |  120 ++
 vendor/go.opentelemetry.io/otel/VERSIONING.md |  224 +++
 .../go.opentelemetry.io/otel/attribute/doc.go |   19 +
 .../otel/attribute/encoder.go                 |  150 ++
 .../otel/attribute/iterator.go                |  143 ++
 .../go.opentelemetry.io/otel/attribute/key.go |  102 ++
 .../go.opentelemetry.io/otel/attribute/kv.go  |  108 ++
 .../go.opentelemetry.io/otel/attribute/set.go |  426 +++++
 .../otel/attribute/type_string.go             |   28 +
 .../otel/attribute/value.go                   |  204 +++
 .../otel/baggage/baggage.go                   |  509 ++++++
 .../otel/baggage/context.go                   |   39 +
 .../go.opentelemetry.io/otel/baggage/doc.go   |   23 +
 .../go.opentelemetry.io/otel/codes/codes.go   |  106 ++
 vendor/go.opentelemetry.io/otel/codes/doc.go  |   24 +
 vendor/go.opentelemetry.io/otel/doc.go        |   37 +
 .../go.opentelemetry.io/otel/error_handler.go |   27 +
 .../otel/exporters/otlp/otlptrace/LICENSE     |  201 +++
 .../otel/exporters/otlp/otlptrace/clients.go  |   54 +
 .../otel/exporters/otlp/otlptrace/exporter.go |  103 ++
 .../otel/exporters/otlp/otlptrace/go.mod      |   81 +
 .../otel/exporters/otlp/otlptrace/go.sum      |  123 ++
 .../internal/connection/connection.go         |  429 +++++
 .../internal/otlpconfig/envconfig.go          |  195 +++
 .../otlptrace/internal/otlpconfig/options.go  |  270 +++
 .../internal/otlpconfig/optiontypes.go        |   64 +
 .../otlp/otlptrace/internal/otlpconfig/tls.go |   34 +
 .../internal/tracetransform/attribute.go      |  141 ++
 .../tracetransform/instrumentation.go         |   31 +
 .../internal/tracetransform/resource.go       |   29 +
 .../otlptrace/internal/tracetransform/span.go |  218 +++
 .../otlp/otlptrace/otlptracegrpc/LICENSE      |  201 +++
 .../otlp/otlptrace/otlptracegrpc/client.go    |  110 ++
 .../otlp/otlptrace/otlptracegrpc/exporter.go  |   31 +
 .../otlp/otlptrace/otlptracegrpc/go.mod       |   78 +
 .../otlp/otlptrace/otlptracegrpc/go.sum       |  123 ++
 .../otlp/otlptrace/otlptracegrpc/options.go   |  132 ++
 .../go.opentelemetry.io/otel/get_main_pkgs.sh |   41 +
 vendor/go.opentelemetry.io/otel/go.mod        |   74 +
 vendor/go.opentelemetry.io/otel/go.sum        |   15 +
 vendor/go.opentelemetry.io/otel/handler.go    |   89 +
 .../otel/internal/baggage/baggage.go          |   43 +
 .../otel/internal/baggage/context.go          |   95 ++
 .../otel/internal/global/propagator.go        |   82 +
 .../otel/internal/global/state.go             |  106 ++
 .../otel/internal/global/trace.go             |  191 +++
 .../otel/internal/rawhelpers.go               |   55 +
 .../go.opentelemetry.io/otel/pre_release.sh   |   95 ++
 .../go.opentelemetry.io/otel/propagation.go   |   31 +
 .../otel/propagation/baggage.go               |   58 +
 .../otel/propagation/doc.go                   |   27 +
 .../otel/propagation/propagation.go           |  127 ++
 .../otel/propagation/trace_context.go         |  157 ++
 vendor/go.opentelemetry.io/otel/sdk/LICENSE   |  201 +++
 .../otel/sdk/instrumentation/library.go       |   36 +
 .../otel/sdk/internal/internal.go             |   37 +
 .../otel/sdk/internal/sanitize.go             |   50 +
 .../otel/sdk/resource/auto.go                 |   72 +
 .../otel/sdk/resource/builtin.go              |  107 ++
 .../otel/sdk/resource/config.go               |   94 ++
 .../otel/sdk/resource/doc.go                  |   31 +
 .../otel/sdk/resource/env.go                  |   96 ++
 .../otel/sdk/resource/os.go                   |   40 +
 .../otel/sdk/resource/process.go              |  238 +++
 .../otel/sdk/resource/resource.go             |  256 +++
 .../otel/sdk/trace/attributesmap.go           |   91 ++
 .../otel/sdk/trace/batch_span_processor.go    |  334 ++++
 .../otel/sdk/trace/config.go                  |   68 +
 .../go.opentelemetry.io/otel/sdk/trace/doc.go |   24 +
 .../otel/sdk/trace/event.go                   |   37 +
 .../otel/sdk/trace/evictedqueue.go            |   38 +
 .../otel/sdk/trace/id_generator.go            |   77 +
 .../otel/sdk/trace/provider.go                |  345 ++++
 .../otel/sdk/trace/sampling.go                |  288 ++++
 .../otel/sdk/trace/simple_span_processor.go   |  103 ++
 .../otel/sdk/trace/snapshot.go                |  138 ++
 .../otel/sdk/trace/span.go                    |  641 ++++++++
 .../otel/sdk/trace/span_exporter.go           |   47 +
 .../otel/sdk/trace/span_processor.go          |   67 +
 .../otel/sdk/trace/tracer.go                  |   75 +
 .../otel/semconv/v1.4.0/doc.go                |   23 +
 .../otel/semconv/v1.4.0/exception.go          |   20 +
 .../otel/semconv/v1.4.0/http.go               |  311 ++++
 .../otel/semconv/v1.4.0/resource.go           |  825 ++++++++++
 .../otel/semconv/v1.4.0/schema.go             |   20 +
 .../otel/semconv/v1.4.0/trace.go              | 1261 ++++++++++++++
 vendor/go.opentelemetry.io/otel/tag.sh        |  178 ++
 vendor/go.opentelemetry.io/otel/trace.go      |   44 +
 vendor/go.opentelemetry.io/otel/trace/LICENSE |  201 +++
 .../go.opentelemetry.io/otel/trace/config.go  |  268 +++
 .../go.opentelemetry.io/otel/trace/context.go |   61 +
 vendor/go.opentelemetry.io/otel/trace/doc.go  |   69 +
 vendor/go.opentelemetry.io/otel/trace/go.mod  |   73 +
 vendor/go.opentelemetry.io/otel/trace/go.sum  |   15 +
 .../otel/trace/nonrecording.go                |   27 +
 vendor/go.opentelemetry.io/otel/trace/noop.go |   89 +
 .../go.opentelemetry.io/otel/trace/trace.go   |  515 ++++++
 .../otel/trace/tracestate.go                  |  217 +++
 .../otel/verify_examples.sh                   |   85 +
 vendor/go.opentelemetry.io/otel/version.go    |   20 +
 vendor/go.opentelemetry.io/otel/versions.yaml |   56 +
 vendor/go.opentelemetry.io/proto/otlp/LICENSE |  201 +++
 .../collector/trace/v1/trace_config.pb.go     |  573 +++++++
 .../collector/trace/v1/trace_service.pb.go    |  252 +++
 .../collector/trace/v1/trace_service.pb.gw.go |  169 ++
 .../trace/v1/trace_service_grpc.pb.go         |  101 ++
 .../proto/otlp/common/v1/common.pb.go         |  679 ++++++++
 .../proto/otlp/resource/v1/resource.pb.go     |  194 +++
 .../proto/otlp/trace/v1/trace.pb.go           | 1230 ++++++++++++++
 .../googleapis/api/httpbody/httpbody.pb.go    |  146 ++
 .../rpc/errdetails/error_details.pb.go        |  878 ++++++++++
 .../protobuf/field_mask/field_mask.pb.go      |  282 ++++
 .../grpc/encoding/gzip/gzip.go                |  133 ++
 .../protobuf/encoding/protojson/decode.go     |  665 ++++++++
 .../protobuf/encoding/protojson/doc.go        |   11 +
 .../protobuf/encoding/protojson/encode.go     |  344 ++++
 .../encoding/protojson/well_known_types.go    |  889 ++++++++++
 .../protobuf/internal/encoding/json/decode.go |  340 ++++
 .../internal/encoding/json/decode_number.go   |  254 +++
 .../internal/encoding/json/decode_string.go   |   91 ++
 .../internal/encoding/json/decode_token.go    |  192 +++
 .../protobuf/internal/encoding/json/encode.go |  276 ++++
 .../types/known/wrapperspb/wrappers.pb.go     |  760 +++++++++
 vendor/modules.txt                            |   64 +-
 228 files changed, 35945 insertions(+), 67 deletions(-)
 create mode 100644 vendor/github.com/cenkalti/backoff/v4/.gitignore
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 create mode 100644 vendor/go.opentelemetry.io/otel/propagation.go
 create mode 100644 vendor/go.opentelemetry.io/otel/propagation/baggage.go
 create mode 100644 vendor/go.opentelemetry.io/otel/propagation/doc.go
 create mode 100644 vendor/go.opentelemetry.io/otel/propagation/propagation.go
 create mode 100644 vendor/go.opentelemetry.io/otel/propagation/trace_context.go
 create mode 100644 vendor/go.opentelemetry.io/otel/sdk/LICENSE
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 create mode 100644 vendor/go.opentelemetry.io/proto/otlp/resource/v1/resource.pb.go
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 create mode 100644 vendor/google.golang.org/genproto/protobuf/field_mask/field_mask.pb.go
 create mode 100644 vendor/google.golang.org/grpc/encoding/gzip/gzip.go
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 create mode 100644 vendor/google.golang.org/protobuf/encoding/protojson/encode.go
 create mode 100644 vendor/google.golang.org/protobuf/encoding/protojson/well_known_types.go
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 create mode 100644 vendor/google.golang.org/protobuf/internal/encoding/json/decode_number.go
 create mode 100644 vendor/google.golang.org/protobuf/internal/encoding/json/decode_string.go
 create mode 100644 vendor/google.golang.org/protobuf/internal/encoding/json/decode_token.go
 create mode 100644 vendor/google.golang.org/protobuf/internal/encoding/json/encode.go
 create mode 100644 vendor/google.golang.org/protobuf/types/known/wrapperspb/wrappers.pb.go

diff --git a/go.mod b/go.mod
index 4e4132204..86d1fccb8 100644
--- a/go.mod
+++ b/go.mod
@@ -30,8 +30,9 @@ require (
 	github.com/fsnotify/fsnotify v1.4.9
 	github.com/gogo/googleapis v1.4.0
 	github.com/gogo/protobuf v1.3.2
-	github.com/google/go-cmp v0.5.5
+	github.com/google/go-cmp v0.5.6
 	github.com/google/uuid v1.2.0
+	github.com/grpc-ecosystem/go-grpc-middleware v1.0.1-0.20190118093823-f849b5445de4
 	github.com/grpc-ecosystem/go-grpc-prometheus v1.2.0
 	github.com/hashicorp/go-multierror v1.0.0
 	github.com/imdario/mergo v0.3.12
@@ -51,10 +52,15 @@ require (
 	github.com/prometheus/procfs v0.6.0 // indirect; temporarily force v0.6.0, which was previously defined in imgcrypt as explicit version
 	github.com/satori/go.uuid v1.2.0 // indirect
 	github.com/sirupsen/logrus v1.8.1
-	github.com/stretchr/testify v1.6.1
+	github.com/stretchr/testify v1.7.0
 	github.com/tchap/go-patricia v2.2.6+incompatible
 	github.com/urfave/cli v1.22.2
 	go.etcd.io/bbolt v1.3.5
+	go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.21.0
+	go.opentelemetry.io/otel v1.0.0-RC1
+	go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.0.0-RC1
+	go.opentelemetry.io/otel/sdk v1.0.0-RC1
+	go.opentelemetry.io/otel/trace v1.0.0-RC1
 	golang.org/x/net v0.0.0-20210226172049-e18ecbb05110
 	golang.org/x/sync v0.0.0-20201207232520-09787c993a3a
 	golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c
diff --git a/go.sum b/go.sum
index 52fc5f19c..3da503a38 100644
--- a/go.sum
+++ b/go.sum
@@ -9,6 +9,7 @@ cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg
 cloud.google.com/go v0.50.0/go.mod h1:r9sluTvynVuxRIOHXQEHMFffphuXHOMZMycpNR5e6To=
 cloud.google.com/go v0.52.0/go.mod h1:pXajvRH/6o3+F9jDHZWQ5PbGhn+o8w9qiu/CffaVdO4=
 cloud.google.com/go v0.53.0/go.mod h1:fp/UouUEsRkN6ryDKNW/Upv/JBKnv6WDthjR6+vze6M=
+cloud.google.com/go v0.54.0 h1:3ithwDMr7/3vpAMXiH+ZQnYbuIsh+OPhUPMFC9enmn0=
 cloud.google.com/go v0.54.0/go.mod h1:1rq2OEkV3YMf6n/9ZvGWI3GWw0VoqH/1x2nd8Is/bPc=
 cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o=
 cloud.google.com/go/bigquery v1.3.0/go.mod h1:PjpwJnslEMmckchkHFfq+HTD2DmtT67aNFKH1/VBDHE=
@@ -55,6 +56,7 @@ github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751/go.mod h1:LOuy
 github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
 github.com/alecthomas/units v0.0.0-20190717042225-c3de453c63f4/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
 github.com/alexflint/go-filemutex v0.0.0-20171022225611-72bdc8eae2ae/go.mod h1:CgnQgUtFrFz9mxFNtED3jI5tLDjKlOM+oUF/sTk6ps0=
+github.com/antihax/optional v1.0.0/go.mod h1:uupD/76wgC+ih3iEmQUL+0Ugr19nfwCT1kdvxnR2qWY=
 github.com/armon/consul-api v0.0.0-20180202201655-eb2c6b5be1b6/go.mod h1:grANhF5doyWs3UAsr3K4I6qtAmlQcZDesFNEHPZAzj8=
 github.com/asaskevich/govalidator v0.0.0-20190424111038-f61b66f89f4a/go.mod h1:lB+ZfQJz7igIIfQNfa7Ml4HSf2uFQQRzpGGRXenZAgY=
 github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
@@ -66,6 +68,8 @@ github.com/bits-and-blooms/bitset v1.2.0 h1:Kn4yilvwNtMACtf1eYDlG8H77R07mZSPbMjL
 github.com/bits-and-blooms/bitset v1.2.0/go.mod h1:gIdJ4wp64HaoK2YrL1Q5/N7Y16edYb8uY+O0FJTyyDA=
 github.com/blang/semver v3.5.1+incompatible/go.mod h1:kRBLl5iJ+tD4TcOOxsy/0fnwebNt5EWlYSAyrTnjyyk=
 github.com/buger/jsonparser v0.0.0-20180808090653-f4dd9f5a6b44/go.mod h1:bbYlZJ7hK1yFx9hf58LP0zeX7UjIGs20ufpu3evjr+s=
+github.com/cenkalti/backoff/v4 v4.1.1 h1:G2HAfAmvm/GcKan2oOQpBXOd2tT2G57ZnZGWa1PxPBQ=
+github.com/cenkalti/backoff/v4 v4.1.1/go.mod h1:scbssz8iZGpm3xbr14ovlUdkxfGXNInqkPWOWmG2CLw=
 github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
 github.com/cespare/xxhash v1.1.0 h1:a6HrQnmkObjyL+Gs60czilIUGqrzKutQD6XZog3p+ko=
 github.com/cespare/xxhash v1.1.0/go.mod h1:XrSqR1VqqWfGrhpAt58auRo0WTKS1nRRg3ghfAqPWnc=
@@ -236,8 +240,9 @@ github.com/golang/protobuf v1.4.0/go.mod h1:jodUvKwWbYaEsadDk5Fwe5c77LiNKVO9IDvq
 github.com/golang/protobuf v1.4.1/go.mod h1:U8fpvMrcmy5pZrNK1lt4xCsGvpyWQ/VVv6QDs8UjoX8=
 github.com/golang/protobuf v1.4.2/go.mod h1:oDoupMAO8OvCJWAcko0GGGIgR6R6ocIYbsSw735rRwI=
 github.com/golang/protobuf v1.4.3/go.mod h1:oDoupMAO8OvCJWAcko0GGGIgR6R6ocIYbsSw735rRwI=
-github.com/golang/protobuf v1.5.0 h1:LUVKkCeviFUMKqHa4tXIIij/lbhnMbP7Fn5wKdKkRh4=
 github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
+github.com/golang/protobuf v1.5.2 h1:ROPKBNFfQgOUMifHyP+KYbvpjbdoFNs+aK7DXlji0Tw=
+github.com/golang/protobuf v1.5.2/go.mod h1:XVQd3VNwM+JqD3oG2Ue2ip4fOMUkwXdXDdiuN0vRsmY=
 github.com/google/btree v0.0.0-20180813153112-4030bb1f1f0c/go.mod h1:lNA+9X1NB3Zf8V7Ke586lFgjr2dZNuvo3lPJSGZ5JPQ=
 github.com/google/btree v1.0.0/go.mod h1:lNA+9X1NB3Zf8V7Ke586lFgjr2dZNuvo3lPJSGZ5JPQ=
 github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5aqRK0M=
@@ -247,8 +252,9 @@ github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/
 github.com/google/go-cmp v0.5.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.2/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.4/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
-github.com/google/go-cmp v0.5.5 h1:Khx7svrCpmxxtHBq5j2mp/xVjsi8hQMfNLvJFAlrGgU=
 github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+github.com/google/go-cmp v0.5.6 h1:BKbKCqvP6I+rmFHt06ZmyQtvB8xAkWdhFyr0ZUNZcxQ=
+github.com/google/go-cmp v0.5.6/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
 github.com/google/gofuzz v1.1.0 h1:Hsa8mG0dQ46ij8Sl2AYJDUv1oA9/d6Vk+3LG99Oe02g=
 github.com/google/gofuzz v1.1.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
@@ -272,11 +278,14 @@ github.com/gorilla/websocket v1.4.0/go.mod h1:E7qHFY5m1UJ88s3WnNqhKjPHQ0heANvMoA
 github.com/gorilla/websocket v1.4.2/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
 github.com/gregjones/httpcache v0.0.0-20180305231024-9cad4c3443a7/go.mod h1:FecbI9+v66THATjSRHfNgh1IVFe/9kFxbXtjV0ctIMA=
 github.com/grpc-ecosystem/go-grpc-middleware v1.0.0/go.mod h1:FiyG127CGDf3tlThmgyCl78X/SZQqEOJBCDaAfeWzPs=
+github.com/grpc-ecosystem/go-grpc-middleware v1.0.1-0.20190118093823-f849b5445de4 h1:z53tR0945TRRQO/fLEVPI6SMv7ZflF0TEaTAoU7tOzg=
 github.com/grpc-ecosystem/go-grpc-middleware v1.0.1-0.20190118093823-f849b5445de4/go.mod h1:FiyG127CGDf3tlThmgyCl78X/SZQqEOJBCDaAfeWzPs=
 github.com/grpc-ecosystem/go-grpc-prometheus v1.2.0 h1:Ovs26xHkKqVztRpIrF/92BcuyuQ/YW4NSIpoGtfXNho=
 github.com/grpc-ecosystem/go-grpc-prometheus v1.2.0/go.mod h1:8NvIoxWQoOIhqOTXgfV/d3M/q6VIi02HzZEHgUlZvzk=
 github.com/grpc-ecosystem/grpc-gateway v1.9.0/go.mod h1:vNeuVxBJEsws4ogUvrchl83t/GYV9WGTSLVdBhOQFDY=
 github.com/grpc-ecosystem/grpc-gateway v1.9.5/go.mod h1:vNeuVxBJEsws4ogUvrchl83t/GYV9WGTSLVdBhOQFDY=
+github.com/grpc-ecosystem/grpc-gateway v1.16.0 h1:gmcG1KaJ57LophUzW0Hy8NmPhnMZb4M0+kPpLofRdBo=
+github.com/grpc-ecosystem/grpc-gateway v1.16.0/go.mod h1:BDjrQk3hbvj6Nolgz8mAMFbcEtjT1g+wF4CSlocrBnw=
 github.com/hashicorp/errwrap v1.0.0 h1:hLrqtEDnRye3+sgx6z4qVLNuviH3MR5aQ0ykNJa/UYA=
 github.com/hashicorp/errwrap v1.0.0/go.mod h1:YH+1FKiLXxHSkmPseP+kNlulaMuP3n2brvKWEqk/Jc4=
 github.com/hashicorp/go-multierror v1.0.0 h1:iVjPR7a6H0tWELX5NxNe7bYopibicUzc7uPribsnS6o=
@@ -420,6 +429,7 @@ github.com/prometheus/procfs v0.6.0 h1:mxy4L2jP6qMonqmq+aTtOx1ifVWUgG/TAmntgbh3x
 github.com/prometheus/procfs v0.6.0/go.mod h1:cz+aTbrPOrUb4q7XlbU9ygM+/jj0fzG6c1xBZuNvfVA=
 github.com/prometheus/tsdb v0.7.1/go.mod h1:qhTCs0VvXwvX/y3TZrWD7rabWM+ijKTux40TwIPHuXU=
 github.com/rogpeppe/fastuuid v0.0.0-20150106093220-6724a57986af/go.mod h1:XWv6SoW27p1b0cqNHllgS5HIMJraePCO15w5zCzIWYg=
+github.com/rogpeppe/fastuuid v1.2.0/go.mod h1:jVj6XXZzXRy/MSR5jhDC/2q6DgLz+nrA6LYCDYWNEvQ=
 github.com/rogpeppe/go-internal v1.3.0/go.mod h1:M8bDsm7K2OlrFYOpmOWEs/qY81heoFRclV5y23lUDJ4=
 github.com/russross/blackfriday/v2 v2.0.1 h1:lPqVAte+HuHNfhJ/0LC98ESWRz8afy9tM/0RK8m9o+Q=
 github.com/russross/blackfriday/v2 v2.0.1/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
@@ -462,8 +472,9 @@ github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXf
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
 github.com/stretchr/testify v1.5.1/go.mod h1:5W2xD1RspED5o8YsWQXVCued0rvSQ+mT+I5cxcmMvtA=
-github.com/stretchr/testify v1.6.1 h1:hDPOHmpOpP40lSULcqw7IrRb/u7w6RpDC9399XyoNd0=
 github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
+github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/syndtr/gocapability v0.0.0-20200815063812-42c35b437635/go.mod h1:hkRG7XYTFWNJGYcbNJQlaLq0fg1yr4J4t/NcTQtrfww=
 github.com/tchap/go-patricia v2.2.6+incompatible h1:JvoDL7JSoIP2HDE8AbDH3zC8QBPxmzYe32HHy5yQ+Ck=
 github.com/tchap/go-patricia v2.2.6+incompatible/go.mod h1:bmLyhP68RS6kStMGxByiQ23RP/odRBOTVjwp2cDyi6I=
@@ -492,8 +503,28 @@ go.opencensus.io v0.22.0/go.mod h1:+kGneAE2xo2IficOXnaByMWTGM9T73dGwxeWcUqIpI8=
 go.opencensus.io v0.22.2/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
 go.opencensus.io v0.22.3 h1:8sGtKOrtQqkN1bp2AtX+misvLIlOmsEsNd+9NIcPEm8=
 go.opencensus.io v0.22.3/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
+go.opentelemetry.io/contrib v0.21.0 h1:RMJ6GlUVzLYp/zmItxTTdAmr1gnpO/HHMFmvjAhvJQM=
+go.opentelemetry.io/contrib v0.21.0/go.mod h1:EH4yDYeNoaTqn/8yCWQmfNB78VHfGX2Jt2bvnvzBlGM=
+go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.21.0 h1:68WZYF6CrnsXIVDYc51cR9VmTX2IM7y0svo7s4lu5kQ=
+go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.21.0/go.mod h1:Vm5u/mtkj1OMhtao0v+BGo2LUoLCgHYXvRmj0jWITlE=
+go.opentelemetry.io/otel v1.0.0-RC1 h1:4CeoX93DNTWt8awGK9JmNXzF9j7TyOu9upscEdtcdXc=
+go.opentelemetry.io/otel v1.0.0-RC1/go.mod h1:x9tRa9HK4hSSq7jf2TKbqFbtt58/TGk0f9XiEYISI1I=
+go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.0.0-RC1 h1:GHKxjc4EDldz8ScMDpiNwX4BAub6wGFUUo5Axm2BimU=
+go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.0.0-RC1/go.mod h1:FliQjImlo7emZVjixV8nbDMAa4iAkcWTE9zzSEOiEPw=
+go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.0.0-RC1 h1:ZOQXuxKJ9evGspu3LvbZxx3KOOQvKAPBJVMOfGf1cOM=
+go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.0.0-RC1/go.mod h1:cDwRc2Jrh5Gku1peGK8p9rRuX/Uq2OtVmLicjlw2WYU=
+go.opentelemetry.io/otel/oteltest v1.0.0-RC1 h1:G685iP3XiskCwk/z0eIabL55XUl2gk0cljhGk9sB0Yk=
+go.opentelemetry.io/otel/oteltest v1.0.0-RC1/go.mod h1:+eoIG0gdEOaPNftuy1YScLr1Gb4mL/9lpDkZ0JjMRq4=
+go.opentelemetry.io/otel/sdk v1.0.0-RC1 h1:Sy2VLOOg24bipyC29PhuMXYNJrLsxkie8hyI7kUlG9Q=
+go.opentelemetry.io/otel/sdk v1.0.0-RC1/go.mod h1:kj6yPn7Pgt5ByRuwesbaWcRLA+V7BSDg3Hf8xRvsvf8=
+go.opentelemetry.io/otel/trace v1.0.0-RC1 h1:jrjqKJZEibFrDz+umEASeU3LvdVyWKlnTh7XEfwrT58=
+go.opentelemetry.io/otel/trace v1.0.0-RC1/go.mod h1:86UHmyHWFEtWjfWPSbu0+d0Pf9Q6e1U+3ViBOc+NXAg=
+go.opentelemetry.io/proto/otlp v0.9.0 h1:C0g6TWmQYvjKRnljRULLWUVJGy8Uvu0NEL/5frY2/t4=
+go.opentelemetry.io/proto/otlp v0.9.0/go.mod h1:1vKfU9rv61e9EVGthD1zNvUbiwPcimSsOPU9brfSHJg=
 go.uber.org/atomic v1.3.2/go.mod h1:gD2HeocX3+yG+ygLZcrzQJaqmWj9AIm7n08wl/qW/PE=
 go.uber.org/atomic v1.4.0/go.mod h1:gD2HeocX3+yG+ygLZcrzQJaqmWj9AIm7n08wl/qW/PE=
+go.uber.org/goleak v1.1.10 h1:z+mqJhf6ss6BSfSM671tgKyZBFPTTJM+HLxnhPC3wu0=
+go.uber.org/goleak v1.1.10/go.mod h1:8a7PlsEVH3e/a/GLqe5IIrQx6GzcnRmZEufDUTk4A7A=
 go.uber.org/multierr v1.1.0/go.mod h1:wR5kodmAFQ0UK8QlbwjlSNy0Z68gJhDJUG5sjR94q/0=
 go.uber.org/zap v1.10.0/go.mod h1:vwi/ZaCAaUcBkycHslxD9B2zi4UTXhF60s6SWpuDF0Q=
 golang.org/x/crypto v0.0.0-20180904163835-0709b304e793/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
@@ -526,6 +557,7 @@ golang.org/x/lint v0.0.0-20190909230951-414d861bb4ac/go.mod h1:6SW0HCj/g11FgYtHl
 golang.org/x/lint v0.0.0-20190930215403-16217165b5de/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
 golang.org/x/lint v0.0.0-20191125180803-fdd1cda4f05f/go.mod h1:5qLYkcX4OjUUV8bRuDixDT3tpyyb+LUpUlRWLxfhWrs=
 golang.org/x/lint v0.0.0-20200130185559-910be7a94367/go.mod h1:3xt1FjdF8hUf6vQPIChWIBhFzV8gjjsPE/fR3IyQdNY=
+golang.org/x/lint v0.0.0-20200302205851-738671d3881b h1:Wh+f8QHJXR411sJR8/vRBTZ7YapZaRvUcLFFJhusH0k=
 golang.org/x/lint v0.0.0-20200302205851-738671d3881b/go.mod h1:3xt1FjdF8hUf6vQPIChWIBhFzV8gjjsPE/fR3IyQdNY=
 golang.org/x/mobile v0.0.0-20190312151609-d3739f865fa6/go.mod h1:z+o9i4GpDbdi3rU15maQ/Ox0txvL9dWGYEHz965HBQE=
 golang.org/x/mobile v0.0.0-20190719004257-d2bd2a29d028/go.mod h1:E/iHnbuqvinMTCcRqshq8CkpyQDoeVncDDYHnLhea+o=
@@ -559,6 +591,7 @@ golang.org/x/net v0.0.0-20200222125558-5a598a2470a0/go.mod h1:z5CRVTTTmAJ677TzLL
 golang.org/x/net v0.0.0-20200226121028-0de0cce0169b/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20200301022130-244492dfa37a/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20200324143707-d3edc9973b7e/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
+golang.org/x/net v0.0.0-20200822124328-c89045814202/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
 golang.org/x/net v0.0.0-20201006153459-a7d1128ccaa0/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
 golang.org/x/net v0.0.0-20201021035429-f5854403a974/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
 golang.org/x/net v0.0.0-20201110031124-69a78807bb2b/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
@@ -665,6 +698,7 @@ golang.org/x/tools v0.0.0-20190628153133-6cdbf07be9d0/go.mod h1:/rFqwRUd4F7ZHNgw
 golang.org/x/tools v0.0.0-20190816200558-6889da9d5479/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20190911174233-4f2ddba30aff/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20191012152004-8de300cfc20a/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/tools v0.0.0-20191108193012-7d206e10da11/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20191113191852-77e3bb0ad9e7/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20191115202509-3a792d9c32b2/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
@@ -681,6 +715,7 @@ golang.org/x/tools v0.0.0-20200212150539-ea181f53ac56/go.mod h1:TB2adYChydJhpapK
 golang.org/x/tools v0.0.0-20200224181240-023911ca70b2/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
 golang.org/x/tools v0.0.0-20200304193943-95d2e580d8eb/go.mod h1:o4KQGtdN14AW+yjsvvwRTJJuXz8XRtIHtEnmAXLyFUw=
 golang.org/x/tools v0.0.0-20200619180055-7c47624df98f/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=
+golang.org/x/tools v0.0.0-20210106214847-113979e3529a h1:CB3a9Nez8M13wwlr/E2YtwoU+qYHKfC+JrDa45RXXoQ=
 golang.org/x/tools v0.0.0-20210106214847-113979e3529a/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
@@ -714,7 +749,9 @@ google.golang.org/grpc v1.25.1/go.mod h1:c3i+UQWmh7LiEpx4sFZnkU36qjEYZ0imhYfXVyQ
 google.golang.org/grpc v1.26.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
 google.golang.org/grpc v1.27.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
 google.golang.org/grpc v1.27.1/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
+google.golang.org/grpc v1.33.1/go.mod h1:fr5YgcSWrqhRRxogOsw7RzIpsmvOZ6IcH4kBYTpR3n0=
 google.golang.org/grpc v1.33.2/go.mod h1:JMHMWHQWaTccqQQlmk3MJZS+GWXOdAesneDmEnv2fbc=
+google.golang.org/grpc v1.37.1/go.mod h1:NREThFqKR1f3iQ6oBuvc5LadQuXVGo9rkm5ZGrQdJfM=
 google.golang.org/grpc v1.38.0 h1:/9BgsAsa5nWe26HqOlvlgJnqBuktYOLCgjCPqsa56W0=
 google.golang.org/grpc v1.38.0/go.mod h1:NREThFqKR1f3iQ6oBuvc5LadQuXVGo9rkm5ZGrQdJfM=
 google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
@@ -750,6 +787,7 @@ gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWD
 gopkg.in/yaml.v2 v2.0.0-20170812160011-eb3733d160e7/go.mod h1:JAlM8MvJe8wmxCU4Bli9HhUf9+ttbYbLASfIpnQbh74=
 gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.3/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.5/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
diff --git a/integration/client/go.sum b/integration/client/go.sum
index 56f73b2d2..7abdca761 100644
--- a/integration/client/go.sum
+++ b/integration/client/go.sum
@@ -57,6 +57,7 @@ github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751/go.mod h1:LOuy
 github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
 github.com/alecthomas/units v0.0.0-20190717042225-c3de453c63f4/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
 github.com/alexflint/go-filemutex v0.0.0-20171022225611-72bdc8eae2ae/go.mod h1:CgnQgUtFrFz9mxFNtED3jI5tLDjKlOM+oUF/sTk6ps0=
+github.com/antihax/optional v1.0.0/go.mod h1:uupD/76wgC+ih3iEmQUL+0Ugr19nfwCT1kdvxnR2qWY=
 github.com/armon/consul-api v0.0.0-20180202201655-eb2c6b5be1b6/go.mod h1:grANhF5doyWs3UAsr3K4I6qtAmlQcZDesFNEHPZAzj8=
 github.com/asaskevich/govalidator v0.0.0-20190424111038-f61b66f89f4a/go.mod h1:lB+ZfQJz7igIIfQNfa7Ml4HSf2uFQQRzpGGRXenZAgY=
 github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
@@ -67,6 +68,7 @@ github.com/bits-and-blooms/bitset v1.2.0 h1:Kn4yilvwNtMACtf1eYDlG8H77R07mZSPbMjL
 github.com/bits-and-blooms/bitset v1.2.0/go.mod h1:gIdJ4wp64HaoK2YrL1Q5/N7Y16edYb8uY+O0FJTyyDA=
 github.com/blang/semver v3.5.1+incompatible/go.mod h1:kRBLl5iJ+tD4TcOOxsy/0fnwebNt5EWlYSAyrTnjyyk=
 github.com/buger/jsonparser v0.0.0-20180808090653-f4dd9f5a6b44/go.mod h1:bbYlZJ7hK1yFx9hf58LP0zeX7UjIGs20ufpu3evjr+s=
+github.com/cenkalti/backoff/v4 v4.1.1/go.mod h1:scbssz8iZGpm3xbr14ovlUdkxfGXNInqkPWOWmG2CLw=
 github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
 github.com/cespare/xxhash v1.1.0/go.mod h1:XrSqR1VqqWfGrhpAt58auRo0WTKS1nRRg3ghfAqPWnc=
 github.com/cespare/xxhash/v2 v2.1.1/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
@@ -224,8 +226,9 @@ github.com/golang/protobuf v1.4.0/go.mod h1:jodUvKwWbYaEsadDk5Fwe5c77LiNKVO9IDvq
 github.com/golang/protobuf v1.4.1/go.mod h1:U8fpvMrcmy5pZrNK1lt4xCsGvpyWQ/VVv6QDs8UjoX8=
 github.com/golang/protobuf v1.4.2/go.mod h1:oDoupMAO8OvCJWAcko0GGGIgR6R6ocIYbsSw735rRwI=
 github.com/golang/protobuf v1.4.3/go.mod h1:oDoupMAO8OvCJWAcko0GGGIgR6R6ocIYbsSw735rRwI=
-github.com/golang/protobuf v1.5.0 h1:LUVKkCeviFUMKqHa4tXIIij/lbhnMbP7Fn5wKdKkRh4=
 github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
+github.com/golang/protobuf v1.5.2 h1:ROPKBNFfQgOUMifHyP+KYbvpjbdoFNs+aK7DXlji0Tw=
+github.com/golang/protobuf v1.5.2/go.mod h1:XVQd3VNwM+JqD3oG2Ue2ip4fOMUkwXdXDdiuN0vRsmY=
 github.com/google/btree v0.0.0-20180813153112-4030bb1f1f0c/go.mod h1:lNA+9X1NB3Zf8V7Ke586lFgjr2dZNuvo3lPJSGZ5JPQ=
 github.com/google/btree v1.0.0/go.mod h1:lNA+9X1NB3Zf8V7Ke586lFgjr2dZNuvo3lPJSGZ5JPQ=
 github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5aqRK0M=
@@ -235,8 +238,9 @@ github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/
 github.com/google/go-cmp v0.5.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.2/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.4/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
-github.com/google/go-cmp v0.5.5 h1:Khx7svrCpmxxtHBq5j2mp/xVjsi8hQMfNLvJFAlrGgU=
 github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+github.com/google/go-cmp v0.5.6 h1:BKbKCqvP6I+rmFHt06ZmyQtvB8xAkWdhFyr0ZUNZcxQ=
+github.com/google/go-cmp v0.5.6/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
 github.com/google/gofuzz v1.1.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
 github.com/google/martian v2.1.0+incompatible/go.mod h1:9I4somxYTbIHy5NJKHRl3wXiIaQGbYVAs8BPL6v8lEs=
@@ -263,6 +267,7 @@ github.com/grpc-ecosystem/go-grpc-middleware v1.0.1-0.20190118093823-f849b5445de
 github.com/grpc-ecosystem/go-grpc-prometheus v1.2.0/go.mod h1:8NvIoxWQoOIhqOTXgfV/d3M/q6VIi02HzZEHgUlZvzk=
 github.com/grpc-ecosystem/grpc-gateway v1.9.0/go.mod h1:vNeuVxBJEsws4ogUvrchl83t/GYV9WGTSLVdBhOQFDY=
 github.com/grpc-ecosystem/grpc-gateway v1.9.5/go.mod h1:vNeuVxBJEsws4ogUvrchl83t/GYV9WGTSLVdBhOQFDY=
+github.com/grpc-ecosystem/grpc-gateway v1.16.0/go.mod h1:BDjrQk3hbvj6Nolgz8mAMFbcEtjT1g+wF4CSlocrBnw=
 github.com/hashicorp/errwrap v1.0.0/go.mod h1:YH+1FKiLXxHSkmPseP+kNlulaMuP3n2brvKWEqk/Jc4=
 github.com/hashicorp/go-multierror v1.0.0/go.mod h1:dHtQlpGsu+cZNNAkkCN/P3hoUDHhCYQXV3UM06sGGrk=
 github.com/hashicorp/golang-lru v0.5.0/go.mod h1:/m3WP610KZHVQ1SGc6re/UDhFvYD7pJ4Ao+sR/qLZy8=
@@ -393,6 +398,7 @@ github.com/prometheus/procfs v0.6.0 h1:mxy4L2jP6qMonqmq+aTtOx1ifVWUgG/TAmntgbh3x
 github.com/prometheus/procfs v0.6.0/go.mod h1:cz+aTbrPOrUb4q7XlbU9ygM+/jj0fzG6c1xBZuNvfVA=
 github.com/prometheus/tsdb v0.7.1/go.mod h1:qhTCs0VvXwvX/y3TZrWD7rabWM+ijKTux40TwIPHuXU=
 github.com/rogpeppe/fastuuid v0.0.0-20150106093220-6724a57986af/go.mod h1:XWv6SoW27p1b0cqNHllgS5HIMJraePCO15w5zCzIWYg=
+github.com/rogpeppe/fastuuid v1.2.0/go.mod h1:jVj6XXZzXRy/MSR5jhDC/2q6DgLz+nrA6LYCDYWNEvQ=
 github.com/rogpeppe/go-internal v1.3.0/go.mod h1:M8bDsm7K2OlrFYOpmOWEs/qY81heoFRclV5y23lUDJ4=
 github.com/russross/blackfriday/v2 v2.0.1/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
 github.com/safchain/ethtool v0.0.0-20190326074333-42ed695e3de8/go.mod h1:Z0q5wiBQGYcxhMZ6gUqHn6pYNLypFAvaL3UvgZLR0U4=
@@ -429,8 +435,9 @@ github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXf
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
 github.com/stretchr/testify v1.5.1/go.mod h1:5W2xD1RspED5o8YsWQXVCued0rvSQ+mT+I5cxcmMvtA=
-github.com/stretchr/testify v1.6.1 h1:hDPOHmpOpP40lSULcqw7IrRb/u7w6RpDC9399XyoNd0=
 github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
+github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/syndtr/gocapability v0.0.0-20200815063812-42c35b437635/go.mod h1:hkRG7XYTFWNJGYcbNJQlaLq0fg1yr4J4t/NcTQtrfww=
 github.com/tchap/go-patricia v2.2.6+incompatible/go.mod h1:bmLyhP68RS6kStMGxByiQ23RP/odRBOTVjwp2cDyi6I=
 github.com/tmc/grpc-websocket-proxy v0.0.0-20170815181823-89b8d40f7ca8/go.mod h1:ncp9v5uamzpCO7NfCPTXjqaC+bZgJeR0sMTm6dMHP7U=
@@ -455,8 +462,18 @@ go.opencensus.io v0.22.0/go.mod h1:+kGneAE2xo2IficOXnaByMWTGM9T73dGwxeWcUqIpI8=
 go.opencensus.io v0.22.2/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
 go.opencensus.io v0.22.3 h1:8sGtKOrtQqkN1bp2AtX+misvLIlOmsEsNd+9NIcPEm8=
 go.opencensus.io v0.22.3/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
+go.opentelemetry.io/contrib v0.21.0/go.mod h1:EH4yDYeNoaTqn/8yCWQmfNB78VHfGX2Jt2bvnvzBlGM=
+go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.21.0/go.mod h1:Vm5u/mtkj1OMhtao0v+BGo2LUoLCgHYXvRmj0jWITlE=
+go.opentelemetry.io/otel v1.0.0-RC1/go.mod h1:x9tRa9HK4hSSq7jf2TKbqFbtt58/TGk0f9XiEYISI1I=
+go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.0.0-RC1/go.mod h1:FliQjImlo7emZVjixV8nbDMAa4iAkcWTE9zzSEOiEPw=
+go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.0.0-RC1/go.mod h1:cDwRc2Jrh5Gku1peGK8p9rRuX/Uq2OtVmLicjlw2WYU=
+go.opentelemetry.io/otel/oteltest v1.0.0-RC1/go.mod h1:+eoIG0gdEOaPNftuy1YScLr1Gb4mL/9lpDkZ0JjMRq4=
+go.opentelemetry.io/otel/sdk v1.0.0-RC1/go.mod h1:kj6yPn7Pgt5ByRuwesbaWcRLA+V7BSDg3Hf8xRvsvf8=
+go.opentelemetry.io/otel/trace v1.0.0-RC1/go.mod h1:86UHmyHWFEtWjfWPSbu0+d0Pf9Q6e1U+3ViBOc+NXAg=
+go.opentelemetry.io/proto/otlp v0.9.0/go.mod h1:1vKfU9rv61e9EVGthD1zNvUbiwPcimSsOPU9brfSHJg=
 go.uber.org/atomic v1.3.2/go.mod h1:gD2HeocX3+yG+ygLZcrzQJaqmWj9AIm7n08wl/qW/PE=
 go.uber.org/atomic v1.4.0/go.mod h1:gD2HeocX3+yG+ygLZcrzQJaqmWj9AIm7n08wl/qW/PE=
+go.uber.org/goleak v1.1.10/go.mod h1:8a7PlsEVH3e/a/GLqe5IIrQx6GzcnRmZEufDUTk4A7A=
 go.uber.org/multierr v1.1.0/go.mod h1:wR5kodmAFQ0UK8QlbwjlSNy0Z68gJhDJUG5sjR94q/0=
 go.uber.org/zap v1.10.0/go.mod h1:vwi/ZaCAaUcBkycHslxD9B2zi4UTXhF60s6SWpuDF0Q=
 golang.org/x/crypto v0.0.0-20180904163835-0709b304e793/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
@@ -521,6 +538,7 @@ golang.org/x/net v0.0.0-20200222125558-5a598a2470a0/go.mod h1:z5CRVTTTmAJ677TzLL
 golang.org/x/net v0.0.0-20200226121028-0de0cce0169b/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20200301022130-244492dfa37a/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20200324143707-d3edc9973b7e/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
+golang.org/x/net v0.0.0-20200822124328-c89045814202/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
 golang.org/x/net v0.0.0-20201006153459-a7d1128ccaa0/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
 golang.org/x/net v0.0.0-20201021035429-f5854403a974/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
 golang.org/x/net v0.0.0-20201110031124-69a78807bb2b/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
@@ -625,6 +643,7 @@ golang.org/x/tools v0.0.0-20190628153133-6cdbf07be9d0/go.mod h1:/rFqwRUd4F7ZHNgw
 golang.org/x/tools v0.0.0-20190816200558-6889da9d5479/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20190911174233-4f2ddba30aff/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20191012152004-8de300cfc20a/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/tools v0.0.0-20191108193012-7d206e10da11/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20191113191852-77e3bb0ad9e7/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20191115202509-3a792d9c32b2/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
@@ -674,7 +693,9 @@ google.golang.org/grpc v1.26.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8
 google.golang.org/grpc v1.27.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
 google.golang.org/grpc v1.27.1/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
 google.golang.org/grpc v1.30.0/go.mod h1:N36X2cJ7JwdamYAgDz+s+rVMFjt3numwzf/HckM8pak=
+google.golang.org/grpc v1.33.1/go.mod h1:fr5YgcSWrqhRRxogOsw7RzIpsmvOZ6IcH4kBYTpR3n0=
 google.golang.org/grpc v1.33.2/go.mod h1:JMHMWHQWaTccqQQlmk3MJZS+GWXOdAesneDmEnv2fbc=
+google.golang.org/grpc v1.37.1/go.mod h1:NREThFqKR1f3iQ6oBuvc5LadQuXVGo9rkm5ZGrQdJfM=
 google.golang.org/grpc v1.38.0 h1:/9BgsAsa5nWe26HqOlvlgJnqBuktYOLCgjCPqsa56W0=
 google.golang.org/grpc v1.38.0/go.mod h1:NREThFqKR1f3iQ6oBuvc5LadQuXVGo9rkm5ZGrQdJfM=
 google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
@@ -707,6 +728,7 @@ gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWD
 gopkg.in/yaml.v2 v2.0.0-20170812160011-eb3733d160e7/go.mod h1:JAlM8MvJe8wmxCU4Bli9HhUf9+ttbYbLASfIpnQbh74=
 gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.3/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.5/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
diff --git a/vendor/github.com/cenkalti/backoff/v4/.gitignore b/vendor/github.com/cenkalti/backoff/v4/.gitignore
new file mode 100644
index 000000000..50d95c548
--- /dev/null
+++ b/vendor/github.com/cenkalti/backoff/v4/.gitignore
@@ -0,0 +1,25 @@
+# Compiled Object files, Static and Dynamic libs (Shared Objects)
+*.o
+*.a
+*.so
+
+# Folders
+_obj
+_test
+
+# Architecture specific extensions/prefixes
+*.[568vq]
+[568vq].out
+
+*.cgo1.go
+*.cgo2.c
+_cgo_defun.c
+_cgo_gotypes.go
+_cgo_export.*
+
+_testmain.go
+
+*.exe
+
+# IDEs
+.idea/
diff --git a/vendor/github.com/cenkalti/backoff/v4/.travis.yml b/vendor/github.com/cenkalti/backoff/v4/.travis.yml
new file mode 100644
index 000000000..c79105c2f
--- /dev/null
+++ b/vendor/github.com/cenkalti/backoff/v4/.travis.yml
@@ -0,0 +1,10 @@
+language: go
+go:
+  - 1.13
+  - 1.x
+  - tip
+before_install:
+  - go get github.com/mattn/goveralls
+  - go get golang.org/x/tools/cmd/cover
+script:
+  - $HOME/gopath/bin/goveralls -service=travis-ci
diff --git a/vendor/github.com/cenkalti/backoff/v4/LICENSE b/vendor/github.com/cenkalti/backoff/v4/LICENSE
new file mode 100644
index 000000000..89b817996
--- /dev/null
+++ b/vendor/github.com/cenkalti/backoff/v4/LICENSE
@@ -0,0 +1,20 @@
+The MIT License (MIT)
+
+Copyright (c) 2014 Cenk Altı
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/vendor/github.com/cenkalti/backoff/v4/README.md b/vendor/github.com/cenkalti/backoff/v4/README.md
new file mode 100644
index 000000000..16abdfc08
--- /dev/null
+++ b/vendor/github.com/cenkalti/backoff/v4/README.md
@@ -0,0 +1,32 @@
+# Exponential Backoff [![GoDoc][godoc image]][godoc] [![Build Status][travis image]][travis] [![Coverage Status][coveralls image]][coveralls]
+
+This is a Go port of the exponential backoff algorithm from [Google's HTTP Client Library for Java][google-http-java-client].
+
+[Exponential backoff][exponential backoff wiki]
+is an algorithm that uses feedback to multiplicatively decrease the rate of some process,
+in order to gradually find an acceptable rate.
+The retries exponentially increase and stop increasing when a certain threshold is met.
+
+## Usage
+
+Import path is `github.com/cenkalti/backoff/v4`. Please note the version part at the end.
+
+Use https://pkg.go.dev/github.com/cenkalti/backoff/v4 to view the documentation.
+
+## Contributing
+
+* I would like to keep this library as small as possible.
+* Please don't send a PR without opening an issue and discussing it first.
+* If proposed change is not a common use case, I will probably not accept it.
+
+[godoc]: https://pkg.go.dev/github.com/cenkalti/backoff/v4
+[godoc image]: https://godoc.org/github.com/cenkalti/backoff?status.png
+[travis]: https://travis-ci.org/cenkalti/backoff
+[travis image]: https://travis-ci.org/cenkalti/backoff.png?branch=master
+[coveralls]: https://coveralls.io/github/cenkalti/backoff?branch=master
+[coveralls image]: https://coveralls.io/repos/github/cenkalti/backoff/badge.svg?branch=master
+
+[google-http-java-client]: https://github.com/google/google-http-java-client/blob/da1aa993e90285ec18579f1553339b00e19b3ab5/google-http-client/src/main/java/com/google/api/client/util/ExponentialBackOff.java
+[exponential backoff wiki]: http://en.wikipedia.org/wiki/Exponential_backoff
+
+[advanced example]: https://pkg.go.dev/github.com/cenkalti/backoff/v4?tab=doc#pkg-examples
diff --git a/vendor/github.com/cenkalti/backoff/v4/backoff.go b/vendor/github.com/cenkalti/backoff/v4/backoff.go
new file mode 100644
index 000000000..3676ee405
--- /dev/null
+++ b/vendor/github.com/cenkalti/backoff/v4/backoff.go
@@ -0,0 +1,66 @@
+// Package backoff implements backoff algorithms for retrying operations.
+//
+// Use Retry function for retrying operations that may fail.
+// If Retry does not meet your needs,
+// copy/paste the function into your project and modify as you wish.
+//
+// There is also Ticker type similar to time.Ticker.
+// You can use it if you need to work with channels.
+//
+// See Examples section below for usage examples.
+package backoff
+
+import "time"
+
+// BackOff is a backoff policy for retrying an operation.
+type BackOff interface {
+	// NextBackOff returns the duration to wait before retrying the operation,
+	// or backoff. Stop to indicate that no more retries should be made.
+	//
+	// Example usage:
+	//
+	// 	duration := backoff.NextBackOff();
+	// 	if (duration == backoff.Stop) {
+	// 		// Do not retry operation.
+	// 	} else {
+	// 		// Sleep for duration and retry operation.
+	// 	}
+	//
+	NextBackOff() time.Duration
+
+	// Reset to initial state.
+	Reset()
+}
+
+// Stop indicates that no more retries should be made for use in NextBackOff().
+const Stop time.Duration = -1
+
+// ZeroBackOff is a fixed backoff policy whose backoff time is always zero,
+// meaning that the operation is retried immediately without waiting, indefinitely.
+type ZeroBackOff struct{}
+
+func (b *ZeroBackOff) Reset() {}
+
+func (b *ZeroBackOff) NextBackOff() time.Duration { return 0 }
+
+// StopBackOff is a fixed backoff policy that always returns backoff.Stop for
+// NextBackOff(), meaning that the operation should never be retried.
+type StopBackOff struct{}
+
+func (b *StopBackOff) Reset() {}
+
+func (b *StopBackOff) NextBackOff() time.Duration { return Stop }
+
+// ConstantBackOff is a backoff policy that always returns the same backoff delay.
+// This is in contrast to an exponential backoff policy,
+// which returns a delay that grows longer as you call NextBackOff() over and over again.
+type ConstantBackOff struct {
+	Interval time.Duration
+}
+
+func (b *ConstantBackOff) Reset()                     {}
+func (b *ConstantBackOff) NextBackOff() time.Duration { return b.Interval }
+
+func NewConstantBackOff(d time.Duration) *ConstantBackOff {
+	return &ConstantBackOff{Interval: d}
+}
diff --git a/vendor/github.com/cenkalti/backoff/v4/context.go b/vendor/github.com/cenkalti/backoff/v4/context.go
new file mode 100644
index 000000000..48482330e
--- /dev/null
+++ b/vendor/github.com/cenkalti/backoff/v4/context.go
@@ -0,0 +1,62 @@
+package backoff
+
+import (
+	"context"
+	"time"
+)
+
+// BackOffContext is a backoff policy that stops retrying after the context
+// is canceled.
+type BackOffContext interface { // nolint: golint
+	BackOff
+	Context() context.Context
+}
+
+type backOffContext struct {
+	BackOff
+	ctx context.Context
+}
+
+// WithContext returns a BackOffContext with context ctx
+//
+// ctx must not be nil
+func WithContext(b BackOff, ctx context.Context) BackOffContext { // nolint: golint
+	if ctx == nil {
+		panic("nil context")
+	}
+
+	if b, ok := b.(*backOffContext); ok {
+		return &backOffContext{
+			BackOff: b.BackOff,
+			ctx:     ctx,
+		}
+	}
+
+	return &backOffContext{
+		BackOff: b,
+		ctx:     ctx,
+	}
+}
+
+func getContext(b BackOff) context.Context {
+	if cb, ok := b.(BackOffContext); ok {
+		return cb.Context()
+	}
+	if tb, ok := b.(*backOffTries); ok {
+		return getContext(tb.delegate)
+	}
+	return context.Background()
+}
+
+func (b *backOffContext) Context() context.Context {
+	return b.ctx
+}
+
+func (b *backOffContext) NextBackOff() time.Duration {
+	select {
+	case <-b.ctx.Done():
+		return Stop
+	default:
+		return b.BackOff.NextBackOff()
+	}
+}
diff --git a/vendor/github.com/cenkalti/backoff/v4/exponential.go b/vendor/github.com/cenkalti/backoff/v4/exponential.go
new file mode 100644
index 000000000..3d3453215
--- /dev/null
+++ b/vendor/github.com/cenkalti/backoff/v4/exponential.go
@@ -0,0 +1,158 @@
+package backoff
+
+import (
+	"math/rand"
+	"time"
+)
+
+/*
+ExponentialBackOff is a backoff implementation that increases the backoff
+period for each retry attempt using a randomization function that grows exponentially.
+
+NextBackOff() is calculated using the following formula:
+
+ randomized interval =
+     RetryInterval * (random value in range [1 - RandomizationFactor, 1 + RandomizationFactor])
+
+In other words NextBackOff() will range between the randomization factor
+percentage below and above the retry interval.
+
+For example, given the following parameters:
+
+ RetryInterval = 2
+ RandomizationFactor = 0.5
+ Multiplier = 2
+
+the actual backoff period used in the next retry attempt will range between 1 and 3 seconds,
+multiplied by the exponential, that is, between 2 and 6 seconds.
+
+Note: MaxInterval caps the RetryInterval and not the randomized interval.
+
+If the time elapsed since an ExponentialBackOff instance is created goes past the
+MaxElapsedTime, then the method NextBackOff() starts returning backoff.Stop.
+
+The elapsed time can be reset by calling Reset().
+
+Example: Given the following default arguments, for 10 tries the sequence will be,
+and assuming we go over the MaxElapsedTime on the 10th try:
+
+ Request #  RetryInterval (seconds)  Randomized Interval (seconds)
+
+  1          0.5                     [0.25,   0.75]
+  2          0.75                    [0.375,  1.125]
+  3          1.125                   [0.562,  1.687]
+  4          1.687                   [0.8435, 2.53]
+  5          2.53                    [1.265,  3.795]
+  6          3.795                   [1.897,  5.692]
+  7          5.692                   [2.846,  8.538]
+  8          8.538                   [4.269, 12.807]
+  9         12.807                   [6.403, 19.210]
+ 10         19.210                   backoff.Stop
+
+Note: Implementation is not thread-safe.
+*/
+type ExponentialBackOff struct {
+	InitialInterval     time.Duration
+	RandomizationFactor float64
+	Multiplier          float64
+	MaxInterval         time.Duration
+	// After MaxElapsedTime the ExponentialBackOff returns Stop.
+	// It never stops if MaxElapsedTime == 0.
+	MaxElapsedTime time.Duration
+	Stop           time.Duration
+	Clock          Clock
+
+	currentInterval time.Duration
+	startTime       time.Time
+}
+
+// Clock is an interface that returns current time for BackOff.
+type Clock interface {
+	Now() time.Time
+}
+
+// Default values for ExponentialBackOff.
+const (
+	DefaultInitialInterval     = 500 * time.Millisecond
+	DefaultRandomizationFactor = 0.5
+	DefaultMultiplier          = 1.5
+	DefaultMaxInterval         = 60 * time.Second
+	DefaultMaxElapsedTime      = 15 * time.Minute
+)
+
+// NewExponentialBackOff creates an instance of ExponentialBackOff using default values.
+func NewExponentialBackOff() *ExponentialBackOff {
+	b := &ExponentialBackOff{
+		InitialInterval:     DefaultInitialInterval,
+		RandomizationFactor: DefaultRandomizationFactor,
+		Multiplier:          DefaultMultiplier,
+		MaxInterval:         DefaultMaxInterval,
+		MaxElapsedTime:      DefaultMaxElapsedTime,
+		Stop:                Stop,
+		Clock:               SystemClock,
+	}
+	b.Reset()
+	return b
+}
+
+type systemClock struct{}
+
+func (t systemClock) Now() time.Time {
+	return time.Now()
+}
+
+// SystemClock implements Clock interface that uses time.Now().
+var SystemClock = systemClock{}
+
+// Reset the interval back to the initial retry interval and restarts the timer.
+// Reset must be called before using b.
+func (b *ExponentialBackOff) Reset() {
+	b.currentInterval = b.InitialInterval
+	b.startTime = b.Clock.Now()
+}
+
+// NextBackOff calculates the next backoff interval using the formula:
+// 	Randomized interval = RetryInterval * (1 ± RandomizationFactor)
+func (b *ExponentialBackOff) NextBackOff() time.Duration {
+	// Make sure we have not gone over the maximum elapsed time.
+	elapsed := b.GetElapsedTime()
+	next := getRandomValueFromInterval(b.RandomizationFactor, rand.Float64(), b.currentInterval)
+	b.incrementCurrentInterval()
+	if b.MaxElapsedTime != 0 && elapsed+next > b.MaxElapsedTime {
+		return b.Stop
+	}
+	return next
+}
+
+// GetElapsedTime returns the elapsed time since an ExponentialBackOff instance
+// is created and is reset when Reset() is called.
+//
+// The elapsed time is computed using time.Now().UnixNano(). It is
+// safe to call even while the backoff policy is used by a running
+// ticker.
+func (b *ExponentialBackOff) GetElapsedTime() time.Duration {
+	return b.Clock.Now().Sub(b.startTime)
+}
+
+// Increments the current interval by multiplying it with the multiplier.
+func (b *ExponentialBackOff) incrementCurrentInterval() {
+	// Check for overflow, if overflow is detected set the current interval to the max interval.
+	if float64(b.currentInterval) >= float64(b.MaxInterval)/b.Multiplier {
+		b.currentInterval = b.MaxInterval
+	} else {
+		b.currentInterval = time.Duration(float64(b.currentInterval) * b.Multiplier)
+	}
+}
+
+// Returns a random value from the following interval:
+// 	[currentInterval - randomizationFactor * currentInterval, currentInterval + randomizationFactor * currentInterval].
+func getRandomValueFromInterval(randomizationFactor, random float64, currentInterval time.Duration) time.Duration {
+	var delta = randomizationFactor * float64(currentInterval)
+	var minInterval = float64(currentInterval) - delta
+	var maxInterval = float64(currentInterval) + delta
+
+	// Get a random value from the range [minInterval, maxInterval].
+	// The formula used below has a +1 because if the minInterval is 1 and the maxInterval is 3 then
+	// we want a 33% chance for selecting either 1, 2 or 3.
+	return time.Duration(minInterval + (random * (maxInterval - minInterval + 1)))
+}
diff --git a/vendor/github.com/cenkalti/backoff/v4/go.mod b/vendor/github.com/cenkalti/backoff/v4/go.mod
new file mode 100644
index 000000000..f811bead9
--- /dev/null
+++ b/vendor/github.com/cenkalti/backoff/v4/go.mod
@@ -0,0 +1,3 @@
+module github.com/cenkalti/backoff/v4
+
+go 1.13
diff --git a/vendor/github.com/cenkalti/backoff/v4/retry.go b/vendor/github.com/cenkalti/backoff/v4/retry.go
new file mode 100644
index 000000000..1ce2507eb
--- /dev/null
+++ b/vendor/github.com/cenkalti/backoff/v4/retry.go
@@ -0,0 +1,112 @@
+package backoff
+
+import (
+	"errors"
+	"time"
+)
+
+// An Operation is executing by Retry() or RetryNotify().
+// The operation will be retried using a backoff policy if it returns an error.
+type Operation func() error
+
+// Notify is a notify-on-error function. It receives an operation error and
+// backoff delay if the operation failed (with an error).
+//
+// NOTE that if the backoff policy stated to stop retrying,
+// the notify function isn't called.
+type Notify func(error, time.Duration)
+
+// Retry the operation o until it does not return error or BackOff stops.
+// o is guaranteed to be run at least once.
+//
+// If o returns a *PermanentError, the operation is not retried, and the
+// wrapped error is returned.
+//
+// Retry sleeps the goroutine for the duration returned by BackOff after a
+// failed operation returns.
+func Retry(o Operation, b BackOff) error {
+	return RetryNotify(o, b, nil)
+}
+
+// RetryNotify calls notify function with the error and wait duration
+// for each failed attempt before sleep.
+func RetryNotify(operation Operation, b BackOff, notify Notify) error {
+	return RetryNotifyWithTimer(operation, b, notify, nil)
+}
+
+// RetryNotifyWithTimer calls notify function with the error and wait duration using the given Timer
+// for each failed attempt before sleep.
+// A default timer that uses system timer is used when nil is passed.
+func RetryNotifyWithTimer(operation Operation, b BackOff, notify Notify, t Timer) error {
+	var err error
+	var next time.Duration
+	if t == nil {
+		t = &defaultTimer{}
+	}
+
+	defer func() {
+		t.Stop()
+	}()
+
+	ctx := getContext(b)
+
+	b.Reset()
+	for {
+		if err = operation(); err == nil {
+			return nil
+		}
+
+		var permanent *PermanentError
+		if errors.As(err, &permanent) {
+			return permanent.Err
+		}
+
+		if next = b.NextBackOff(); next == Stop {
+			if cerr := ctx.Err(); cerr != nil {
+				return cerr
+			}
+
+			return err
+		}
+
+		if notify != nil {
+			notify(err, next)
+		}
+
+		t.Start(next)
+
+		select {
+		case <-ctx.Done():
+			return ctx.Err()
+		case <-t.C():
+		}
+	}
+}
+
+// PermanentError signals that the operation should not be retried.
+type PermanentError struct {
+	Err error
+}
+
+func (e *PermanentError) Error() string {
+	return e.Err.Error()
+}
+
+func (e *PermanentError) Unwrap() error {
+	return e.Err
+}
+
+func (e *PermanentError) Is(target error) bool {
+	_, ok := target.(*PermanentError)
+	return ok
+}
+
+// Permanent wraps the given err in a *PermanentError.
+func Permanent(err error) error {
+	if err == nil {
+		return nil
+	}
+	return &PermanentError{
+		Err: err,
+	}
+}
diff --git a/vendor/github.com/cenkalti/backoff/v4/ticker.go b/vendor/github.com/cenkalti/backoff/v4/ticker.go
new file mode 100644
index 000000000..df9d68bce
--- /dev/null
+++ b/vendor/github.com/cenkalti/backoff/v4/ticker.go
@@ -0,0 +1,97 @@
+package backoff
+
+import (
+	"context"
+	"sync"
+	"time"
+)
+
+// Ticker holds a channel that delivers `ticks' of a clock at times reported by a BackOff.
+//
+// Ticks will continue to arrive when the previous operation is still running,
+// so operations that take a while to fail could run in quick succession.
+type Ticker struct {
+	C        <-chan time.Time
+	c        chan time.Time
+	b        BackOff
+	ctx      context.Context
+	timer    Timer
+	stop     chan struct{}
+	stopOnce sync.Once
+}
+
+// NewTicker returns a new Ticker containing a channel that will send
+// the time at times specified by the BackOff argument. Ticker is
+// guaranteed to tick at least once.  The channel is closed when Stop
+// method is called or BackOff stops. It is not safe to manipulate the
+// provided backoff policy (notably calling NextBackOff or Reset)
+// while the ticker is running.
+func NewTicker(b BackOff) *Ticker {
+	return NewTickerWithTimer(b, &defaultTimer{})
+}
+
+// NewTickerWithTimer returns a new Ticker with a custom timer.
+// A default timer that uses system timer is used when nil is passed.
+func NewTickerWithTimer(b BackOff, timer Timer) *Ticker {
+	if timer == nil {
+		timer = &defaultTimer{}
+	}
+	c := make(chan time.Time)
+	t := &Ticker{
+		C:     c,
+		c:     c,
+		b:     b,
+		ctx:   getContext(b),
+		timer: timer,
+		stop:  make(chan struct{}),
+	}
+	t.b.Reset()
+	go t.run()
+	return t
+}
+
+// Stop turns off a ticker. After Stop, no more ticks will be sent.
+func (t *Ticker) Stop() {
+	t.stopOnce.Do(func() { close(t.stop) })
+}
+
+func (t *Ticker) run() {
+	c := t.c
+	defer close(c)
+
+	// Ticker is guaranteed to tick at least once.
+	afterC := t.send(time.Now())
+
+	for {
+		if afterC == nil {
+			return
+		}
+
+		select {
+		case tick := <-afterC:
+			afterC = t.send(tick)
+		case <-t.stop:
+			t.c = nil // Prevent future ticks from being sent to the channel.
+			return
+		case <-t.ctx.Done():
+			return
+		}
+	}
+}
+
+func (t *Ticker) send(tick time.Time) <-chan time.Time {
+	select {
+	case t.c <- tick:
+	case <-t.stop:
+		return nil
+	}
+
+	next := t.b.NextBackOff()
+	if next == Stop {
+		t.Stop()
+		return nil
+	}
+
+	t.timer.Start(next)
+	return t.timer.C()
+}
diff --git a/vendor/github.com/cenkalti/backoff/v4/timer.go b/vendor/github.com/cenkalti/backoff/v4/timer.go
new file mode 100644
index 000000000..8120d0213
--- /dev/null
+++ b/vendor/github.com/cenkalti/backoff/v4/timer.go
@@ -0,0 +1,35 @@
+package backoff
+
+import "time"
+
+type Timer interface {
+	Start(duration time.Duration)
+	Stop()
+	C() <-chan time.Time
+}
+
+// defaultTimer implements Timer interface using time.Timer
+type defaultTimer struct {
+	timer *time.Timer
+}
+
+// C returns the timers channel which receives the current time when the timer fires.
+func (t *defaultTimer) C() <-chan time.Time {
+	return t.timer.C
+}
+
+// Start starts the timer to fire after the given duration
+func (t *defaultTimer) Start(duration time.Duration) {
+	if t.timer == nil {
+		t.timer = time.NewTimer(duration)
+	} else {
+		t.timer.Reset(duration)
+	}
+}
+
+// Stop is called when the timer is not used anymore and resources may be freed.
+func (t *defaultTimer) Stop() {
+	if t.timer != nil {
+		t.timer.Stop()
+	}
+}
diff --git a/vendor/github.com/cenkalti/backoff/v4/tries.go b/vendor/github.com/cenkalti/backoff/v4/tries.go
new file mode 100644
index 000000000..28d58ca37
--- /dev/null
+++ b/vendor/github.com/cenkalti/backoff/v4/tries.go
@@ -0,0 +1,38 @@
+package backoff
+
+import "time"
+
+/*
+WithMaxRetries creates a wrapper around another BackOff, which will
+return Stop if NextBackOff() has been called too many times since
+the last time Reset() was called
+
+Note: Implementation is not thread-safe.
+*/
+func WithMaxRetries(b BackOff, max uint64) BackOff {
+	return &backOffTries{delegate: b, maxTries: max}
+}
+
+type backOffTries struct {
+	delegate BackOff
+	maxTries uint64
+	numTries uint64
+}
+
+func (b *backOffTries) NextBackOff() time.Duration {
+	if b.maxTries == 0 {
+		return Stop
+	}
+	if b.maxTries > 0 {
+		if b.maxTries <= b.numTries {
+			return Stop
+		}
+		b.numTries++
+	}
+	return b.delegate.NextBackOff()
+}
+
+func (b *backOffTries) Reset() {
+	b.numTries = 0
+	b.delegate.Reset()
+}
diff --git a/vendor/github.com/golang/protobuf/descriptor/descriptor.go b/vendor/github.com/golang/protobuf/descriptor/descriptor.go
new file mode 100644
index 000000000..ffde8a650
--- /dev/null
+++ b/vendor/github.com/golang/protobuf/descriptor/descriptor.go
@@ -0,0 +1,180 @@
+// Copyright 2016 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package descriptor provides functions for obtaining the protocol buffer
+// descriptors of generated Go types.
+//
+// Deprecated: See the "google.golang.org/protobuf/reflect/protoreflect" package
+// for how to obtain an EnumDescriptor or MessageDescriptor in order to
+// programatically interact with the protobuf type system.
+package descriptor
+
+import (
+	"bytes"
+	"compress/gzip"
+	"io/ioutil"
+	"sync"
+
+	"github.com/golang/protobuf/proto"
+	"google.golang.org/protobuf/reflect/protodesc"
+	"google.golang.org/protobuf/reflect/protoreflect"
+	"google.golang.org/protobuf/runtime/protoimpl"
+
+	descriptorpb "github.com/golang/protobuf/protoc-gen-go/descriptor"
+)
+
+// Message is proto.Message with a method to return its descriptor.
+//
+// Deprecated: The Descriptor method may not be generated by future
+// versions of protoc-gen-go, meaning that this interface may not
+// be implemented by many concrete message types.
+type Message interface {
+	proto.Message
+	Descriptor() ([]byte, []int)
+}
+
+// ForMessage returns the file descriptor proto containing
+// the message and the message descriptor proto for the message itself.
+// The returned proto messages must not be mutated.
+//
+// Deprecated: Not all concrete message types satisfy the Message interface.
+// Use MessageDescriptorProto instead. If possible, the calling code should
+// be rewritten to use protobuf reflection instead.
+// See package "google.golang.org/protobuf/reflect/protoreflect" for details.
+func ForMessage(m Message) (*descriptorpb.FileDescriptorProto, *descriptorpb.DescriptorProto) {
+	return MessageDescriptorProto(m)
+}
+
+type rawDesc struct {
+	fileDesc []byte
+	indexes  []int
+}
+
+var rawDescCache sync.Map // map[protoreflect.Descriptor]*rawDesc
+
+func deriveRawDescriptor(d protoreflect.Descriptor) ([]byte, []int) {
+	// Fast-path: check whether raw descriptors are already cached.
+	origDesc := d
+	if v, ok := rawDescCache.Load(origDesc); ok {
+		return v.(*rawDesc).fileDesc, v.(*rawDesc).indexes
+	}
+
+	// Slow-path: derive the raw descriptor from the v2 descriptor.
+
+	// Start with the leaf (a given enum or message declaration) and
+	// ascend upwards until we hit the parent file descriptor.
+	var idxs []int
+	for {
+		idxs = append(idxs, d.Index())
+		d = d.Parent()
+		if d == nil {
+			// TODO: We could construct a FileDescriptor stub for standalone
+			// descriptors to satisfy the API.
+			return nil, nil
+		}
+		if _, ok := d.(protoreflect.FileDescriptor); ok {
+			break
+		}
+	}
+
+	// Obtain the raw file descriptor.
+	fd := d.(protoreflect.FileDescriptor)
+	b, _ := proto.Marshal(protodesc.ToFileDescriptorProto(fd))
+	file := protoimpl.X.CompressGZIP(b)
+
+	// Reverse the indexes, since we populated it in reverse.
+	for i, j := 0, len(idxs)-1; i < j; i, j = i+1, j-1 {
+		idxs[i], idxs[j] = idxs[j], idxs[i]
+	}
+
+	if v, ok := rawDescCache.LoadOrStore(origDesc, &rawDesc{file, idxs}); ok {
+		return v.(*rawDesc).fileDesc, v.(*rawDesc).indexes
+	}
+	return file, idxs
+}
+
+// EnumRawDescriptor returns the GZIP'd raw file descriptor representing
+// the enum and the index path to reach the enum declaration.
+// The returned slices must not be mutated.
+func EnumRawDescriptor(e proto.GeneratedEnum) ([]byte, []int) {
+	if ev, ok := e.(interface{ EnumDescriptor() ([]byte, []int) }); ok {
+		return ev.EnumDescriptor()
+	}
+	ed := protoimpl.X.EnumTypeOf(e)
+	return deriveRawDescriptor(ed.Descriptor())
+}
+
+// MessageRawDescriptor returns the GZIP'd raw file descriptor representing
+// the message and the index path to reach the message declaration.
+// The returned slices must not be mutated.
+func MessageRawDescriptor(m proto.GeneratedMessage) ([]byte, []int) {
+	if mv, ok := m.(interface{ Descriptor() ([]byte, []int) }); ok {
+		return mv.Descriptor()
+	}
+	md := protoimpl.X.MessageTypeOf(m)
+	return deriveRawDescriptor(md.Descriptor())
+}
+
+var fileDescCache sync.Map // map[*byte]*descriptorpb.FileDescriptorProto
+
+func deriveFileDescriptor(rawDesc []byte) *descriptorpb.FileDescriptorProto {
+	// Fast-path: check whether descriptor protos are already cached.
+	if v, ok := fileDescCache.Load(&rawDesc[0]); ok {
+		return v.(*descriptorpb.FileDescriptorProto)
+	}
+
+	// Slow-path: derive the descriptor proto from the GZIP'd message.
+	zr, err := gzip.NewReader(bytes.NewReader(rawDesc))
+	if err != nil {
+		panic(err)
+	}
+	b, err := ioutil.ReadAll(zr)
+	if err != nil {
+		panic(err)
+	}
+	fd := new(descriptorpb.FileDescriptorProto)
+	if err := proto.Unmarshal(b, fd); err != nil {
+		panic(err)
+	}
+	if v, ok := fileDescCache.LoadOrStore(&rawDesc[0], fd); ok {
+		return v.(*descriptorpb.FileDescriptorProto)
+	}
+	return fd
+}
+
+// EnumDescriptorProto returns the file descriptor proto representing
+// the enum and the enum descriptor proto for the enum itself.
+// The returned proto messages must not be mutated.
+func EnumDescriptorProto(e proto.GeneratedEnum) (*descriptorpb.FileDescriptorProto, *descriptorpb.EnumDescriptorProto) {
+	rawDesc, idxs := EnumRawDescriptor(e)
+	if rawDesc == nil || idxs == nil {
+		return nil, nil
+	}
+	fd := deriveFileDescriptor(rawDesc)
+	if len(idxs) == 1 {
+		return fd, fd.EnumType[idxs[0]]
+	}
+	md := fd.MessageType[idxs[0]]
+	for _, i := range idxs[1 : len(idxs)-1] {
+		md = md.NestedType[i]
+	}
+	ed := md.EnumType[idxs[len(idxs)-1]]
+	return fd, ed
+}
+
+// MessageDescriptorProto returns the file descriptor proto representing
+// the message and the message descriptor proto for the message itself.
+// The returned proto messages must not be mutated.
+func MessageDescriptorProto(m proto.GeneratedMessage) (*descriptorpb.FileDescriptorProto, *descriptorpb.DescriptorProto) {
+	rawDesc, idxs := MessageRawDescriptor(m)
+	if rawDesc == nil || idxs == nil {
+		return nil, nil
+	}
+	fd := deriveFileDescriptor(rawDesc)
+	md := fd.MessageType[idxs[0]]
+	for _, i := range idxs[1:] {
+		md = md.NestedType[i]
+	}
+	return fd, md
+}
diff --git a/vendor/github.com/golang/protobuf/jsonpb/decode.go b/vendor/github.com/golang/protobuf/jsonpb/decode.go
new file mode 100644
index 000000000..60e82caa9
--- /dev/null
+++ b/vendor/github.com/golang/protobuf/jsonpb/decode.go
@@ -0,0 +1,524 @@
+// Copyright 2015 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package jsonpb
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"math"
+	"reflect"
+	"strconv"
+	"strings"
+	"time"
+
+	"github.com/golang/protobuf/proto"
+	"google.golang.org/protobuf/encoding/protojson"
+	protoV2 "google.golang.org/protobuf/proto"
+	"google.golang.org/protobuf/reflect/protoreflect"
+	"google.golang.org/protobuf/reflect/protoregistry"
+)
+
+const wrapJSONUnmarshalV2 = false
+
+// UnmarshalNext unmarshals the next JSON object from d into m.
+func UnmarshalNext(d *json.Decoder, m proto.Message) error {
+	return new(Unmarshaler).UnmarshalNext(d, m)
+}
+
+// Unmarshal unmarshals a JSON object from r into m.
+func Unmarshal(r io.Reader, m proto.Message) error {
+	return new(Unmarshaler).Unmarshal(r, m)
+}
+
+// UnmarshalString unmarshals a JSON object from s into m.
+func UnmarshalString(s string, m proto.Message) error {
+	return new(Unmarshaler).Unmarshal(strings.NewReader(s), m)
+}
+
+// Unmarshaler is a configurable object for converting from a JSON
+// representation to a protocol buffer object.
+type Unmarshaler struct {
+	// AllowUnknownFields specifies whether to allow messages to contain
+	// unknown JSON fields, as opposed to failing to unmarshal.
+	AllowUnknownFields bool
+
+	// AnyResolver is used to resolve the google.protobuf.Any well-known type.
+	// If unset, the global registry is used by default.
+	AnyResolver AnyResolver
+}
+
+// JSONPBUnmarshaler is implemented by protobuf messages that customize the way
+// they are unmarshaled from JSON. Messages that implement this should also
+// implement JSONPBMarshaler so that the custom format can be produced.
+//
+// The JSON unmarshaling must follow the JSON to proto specification:
+//	https://developers.google.com/protocol-buffers/docs/proto3#json
+//
+// Deprecated: Custom types should implement protobuf reflection instead.
+type JSONPBUnmarshaler interface {
+	UnmarshalJSONPB(*Unmarshaler, []byte) error
+}
+
+// Unmarshal unmarshals a JSON object from r into m.
+func (u *Unmarshaler) Unmarshal(r io.Reader, m proto.Message) error {
+	return u.UnmarshalNext(json.NewDecoder(r), m)
+}
+
+// UnmarshalNext unmarshals the next JSON object from d into m.
+func (u *Unmarshaler) UnmarshalNext(d *json.Decoder, m proto.Message) error {
+	if m == nil {
+		return errors.New("invalid nil message")
+	}
+
+	// Parse the next JSON object from the stream.
+	raw := json.RawMessage{}
+	if err := d.Decode(&raw); err != nil {
+		return err
+	}
+
+	// Check for custom unmarshalers first since they may not properly
+	// implement protobuf reflection that the logic below relies on.
+	if jsu, ok := m.(JSONPBUnmarshaler); ok {
+		return jsu.UnmarshalJSONPB(u, raw)
+	}
+
+	mr := proto.MessageReflect(m)
+
+	// NOTE: For historical reasons, a top-level null is treated as a noop.
+	// This is incorrect, but kept for compatibility.
+	if string(raw) == "null" && mr.Descriptor().FullName() != "google.protobuf.Value" {
+		return nil
+	}
+
+	if wrapJSONUnmarshalV2 {
+		// NOTE: If input message is non-empty, we need to preserve merge semantics
+		// of the old jsonpb implementation. These semantics are not supported by
+		// the protobuf JSON specification.
+		isEmpty := true
+		mr.Range(func(protoreflect.FieldDescriptor, protoreflect.Value) bool {
+			isEmpty = false // at least one iteration implies non-empty
+			return false
+		})
+		if !isEmpty {
+			// Perform unmarshaling into a newly allocated, empty message.
+			mr = mr.New()
+
+			// Use a defer to copy all unmarshaled fields into the original message.
+			dst := proto.MessageReflect(m)
+			defer mr.Range(func(fd protoreflect.FieldDescriptor, v protoreflect.Value) bool {
+				dst.Set(fd, v)
+				return true
+			})
+		}
+
+		// Unmarshal using the v2 JSON unmarshaler.
+		opts := protojson.UnmarshalOptions{
+			DiscardUnknown: u.AllowUnknownFields,
+		}
+		if u.AnyResolver != nil {
+			opts.Resolver = anyResolver{u.AnyResolver}
+		}
+		return opts.Unmarshal(raw, mr.Interface())
+	} else {
+		if err := u.unmarshalMessage(mr, raw); err != nil {
+			return err
+		}
+		return protoV2.CheckInitialized(mr.Interface())
+	}
+}
+
+func (u *Unmarshaler) unmarshalMessage(m protoreflect.Message, in []byte) error {
+	md := m.Descriptor()
+	fds := md.Fields()
+
+	if jsu, ok := proto.MessageV1(m.Interface()).(JSONPBUnmarshaler); ok {
+		return jsu.UnmarshalJSONPB(u, in)
+	}
+
+	if string(in) == "null" && md.FullName() != "google.protobuf.Value" {
+		return nil
+	}
+
+	switch wellKnownType(md.FullName()) {
+	case "Any":
+		var jsonObject map[string]json.RawMessage
+		if err := json.Unmarshal(in, &jsonObject); err != nil {
+			return err
+		}
+
+		rawTypeURL, ok := jsonObject["@type"]
+		if !ok {
+			return errors.New("Any JSON doesn't have '@type'")
+		}
+		typeURL, err := unquoteString(string(rawTypeURL))
+		if err != nil {
+			return fmt.Errorf("can't unmarshal Any's '@type': %q", rawTypeURL)
+		}
+		m.Set(fds.ByNumber(1), protoreflect.ValueOfString(typeURL))
+
+		var m2 protoreflect.Message
+		if u.AnyResolver != nil {
+			mi, err := u.AnyResolver.Resolve(typeURL)
+			if err != nil {
+				return err
+			}
+			m2 = proto.MessageReflect(mi)
+		} else {
+			mt, err := protoregistry.GlobalTypes.FindMessageByURL(typeURL)
+			if err != nil {
+				if err == protoregistry.NotFound {
+					return fmt.Errorf("could not resolve Any message type: %v", typeURL)
+				}
+				return err
+			}
+			m2 = mt.New()
+		}
+
+		if wellKnownType(m2.Descriptor().FullName()) != "" {
+			rawValue, ok := jsonObject["value"]
+			if !ok {
+				return errors.New("Any JSON doesn't have 'value'")
+			}
+			if err := u.unmarshalMessage(m2, rawValue); err != nil {
+				return fmt.Errorf("can't unmarshal Any nested proto %v: %v", typeURL, err)
+			}
+		} else {
+			delete(jsonObject, "@type")
+			rawJSON, err := json.Marshal(jsonObject)
+			if err != nil {
+				return fmt.Errorf("can't generate JSON for Any's nested proto to be unmarshaled: %v", err)
+			}
+			if err = u.unmarshalMessage(m2, rawJSON); err != nil {
+				return fmt.Errorf("can't unmarshal Any nested proto %v: %v", typeURL, err)
+			}
+		}
+
+		rawWire, err := protoV2.Marshal(m2.Interface())
+		if err != nil {
+			return fmt.Errorf("can't marshal proto %v into Any.Value: %v", typeURL, err)
+		}
+		m.Set(fds.ByNumber(2), protoreflect.ValueOfBytes(rawWire))
+		return nil
+	case "BoolValue", "BytesValue", "StringValue",
+		"Int32Value", "UInt32Value", "FloatValue",
+		"Int64Value", "UInt64Value", "DoubleValue":
+		fd := fds.ByNumber(1)
+		v, err := u.unmarshalValue(m.NewField(fd), in, fd)
+		if err != nil {
+			return err
+		}
+		m.Set(fd, v)
+		return nil
+	case "Duration":
+		v, err := unquoteString(string(in))
+		if err != nil {
+			return err
+		}
+		d, err := time.ParseDuration(v)
+		if err != nil {
+			return fmt.Errorf("bad Duration: %v", err)
+		}
+
+		sec := d.Nanoseconds() / 1e9
+		nsec := d.Nanoseconds() % 1e9
+		m.Set(fds.ByNumber(1), protoreflect.ValueOfInt64(int64(sec)))
+		m.Set(fds.ByNumber(2), protoreflect.ValueOfInt32(int32(nsec)))
+		return nil
+	case "Timestamp":
+		v, err := unquoteString(string(in))
+		if err != nil {
+			return err
+		}
+		t, err := time.Parse(time.RFC3339Nano, v)
+		if err != nil {
+			return fmt.Errorf("bad Timestamp: %v", err)
+		}
+
+		sec := t.Unix()
+		nsec := t.Nanosecond()
+		m.Set(fds.ByNumber(1), protoreflect.ValueOfInt64(int64(sec)))
+		m.Set(fds.ByNumber(2), protoreflect.ValueOfInt32(int32(nsec)))
+		return nil
+	case "Value":
+		switch {
+		case string(in) == "null":
+			m.Set(fds.ByNumber(1), protoreflect.ValueOfEnum(0))
+		case string(in) == "true":
+			m.Set(fds.ByNumber(4), protoreflect.ValueOfBool(true))
+		case string(in) == "false":
+			m.Set(fds.ByNumber(4), protoreflect.ValueOfBool(false))
+		case hasPrefixAndSuffix('"', in, '"'):
+			s, err := unquoteString(string(in))
+			if err != nil {
+				return fmt.Errorf("unrecognized type for Value %q", in)
+			}
+			m.Set(fds.ByNumber(3), protoreflect.ValueOfString(s))
+		case hasPrefixAndSuffix('[', in, ']'):
+			v := m.Mutable(fds.ByNumber(6))
+			return u.unmarshalMessage(v.Message(), in)
+		case hasPrefixAndSuffix('{', in, '}'):
+			v := m.Mutable(fds.ByNumber(5))
+			return u.unmarshalMessage(v.Message(), in)
+		default:
+			f, err := strconv.ParseFloat(string(in), 0)
+			if err != nil {
+				return fmt.Errorf("unrecognized type for Value %q", in)
+			}
+			m.Set(fds.ByNumber(2), protoreflect.ValueOfFloat64(f))
+		}
+		return nil
+	case "ListValue":
+		var jsonArray []json.RawMessage
+		if err := json.Unmarshal(in, &jsonArray); err != nil {
+			return fmt.Errorf("bad ListValue: %v", err)
+		}
+
+		lv := m.Mutable(fds.ByNumber(1)).List()
+		for _, raw := range jsonArray {
+			ve := lv.NewElement()
+			if err := u.unmarshalMessage(ve.Message(), raw); err != nil {
+				return err
+			}
+			lv.Append(ve)
+		}
+		return nil
+	case "Struct":
+		var jsonObject map[string]json.RawMessage
+		if err := json.Unmarshal(in, &jsonObject); err != nil {
+			return fmt.Errorf("bad StructValue: %v", err)
+		}
+
+		mv := m.Mutable(fds.ByNumber(1)).Map()
+		for key, raw := range jsonObject {
+			kv := protoreflect.ValueOf(key).MapKey()
+			vv := mv.NewValue()
+			if err := u.unmarshalMessage(vv.Message(), raw); err != nil {
+				return fmt.Errorf("bad value in StructValue for key %q: %v", key, err)
+			}
+			mv.Set(kv, vv)
+		}
+		return nil
+	}
+
+	var jsonObject map[string]json.RawMessage
+	if err := json.Unmarshal(in, &jsonObject); err != nil {
+		return err
+	}
+
+	// Handle known fields.
+	for i := 0; i < fds.Len(); i++ {
+		fd := fds.Get(i)
+		if fd.IsWeak() && fd.Message().IsPlaceholder() {
+			continue //  weak reference is not linked in
+		}
+
+		// Search for any raw JSON value associated with this field.
+		var raw json.RawMessage
+		name := string(fd.Name())
+		if fd.Kind() == protoreflect.GroupKind {
+			name = string(fd.Message().Name())
+		}
+		if v, ok := jsonObject[name]; ok {
+			delete(jsonObject, name)
+			raw = v
+		}
+		name = string(fd.JSONName())
+		if v, ok := jsonObject[name]; ok {
+			delete(jsonObject, name)
+			raw = v
+		}
+
+		field := m.NewField(fd)
+		// Unmarshal the field value.
+		if raw == nil || (string(raw) == "null" && !isSingularWellKnownValue(fd) && !isSingularJSONPBUnmarshaler(field, fd)) {
+			continue
+		}
+		v, err := u.unmarshalValue(field, raw, fd)
+		if err != nil {
+			return err
+		}
+		m.Set(fd, v)
+	}
+
+	// Handle extension fields.
+	for name, raw := range jsonObject {
+		if !strings.HasPrefix(name, "[") || !strings.HasSuffix(name, "]") {
+			continue
+		}
+
+		// Resolve the extension field by name.
+		xname := protoreflect.FullName(name[len("[") : len(name)-len("]")])
+		xt, _ := protoregistry.GlobalTypes.FindExtensionByName(xname)
+		if xt == nil && isMessageSet(md) {
+			xt, _ = protoregistry.GlobalTypes.FindExtensionByName(xname.Append("message_set_extension"))
+		}
+		if xt == nil {
+			continue
+		}
+		delete(jsonObject, name)
+		fd := xt.TypeDescriptor()
+		if fd.ContainingMessage().FullName() != m.Descriptor().FullName() {
+			return fmt.Errorf("extension field %q does not extend message %q", xname, m.Descriptor().FullName())
+		}
+
+		field := m.NewField(fd)
+		// Unmarshal the field value.
+		if raw == nil || (string(raw) == "null" && !isSingularWellKnownValue(fd) && !isSingularJSONPBUnmarshaler(field, fd)) {
+			continue
+		}
+		v, err := u.unmarshalValue(field, raw, fd)
+		if err != nil {
+			return err
+		}
+		m.Set(fd, v)
+	}
+
+	if !u.AllowUnknownFields && len(jsonObject) > 0 {
+		for name := range jsonObject {
+			return fmt.Errorf("unknown field %q in %v", name, md.FullName())
+		}
+	}
+	return nil
+}
+
+func isSingularWellKnownValue(fd protoreflect.FieldDescriptor) bool {
+	if md := fd.Message(); md != nil {
+		return md.FullName() == "google.protobuf.Value" && fd.Cardinality() != protoreflect.Repeated
+	}
+	return false
+}
+
+func isSingularJSONPBUnmarshaler(v protoreflect.Value, fd protoreflect.FieldDescriptor) bool {
+	if fd.Message() != nil && fd.Cardinality() != protoreflect.Repeated {
+		_, ok := proto.MessageV1(v.Interface()).(JSONPBUnmarshaler)
+		return ok
+	}
+	return false
+}
+
+func (u *Unmarshaler) unmarshalValue(v protoreflect.Value, in []byte, fd protoreflect.FieldDescriptor) (protoreflect.Value, error) {
+	switch {
+	case fd.IsList():
+		var jsonArray []json.RawMessage
+		if err := json.Unmarshal(in, &jsonArray); err != nil {
+			return v, err
+		}
+		lv := v.List()
+		for _, raw := range jsonArray {
+			ve, err := u.unmarshalSingularValue(lv.NewElement(), raw, fd)
+			if err != nil {
+				return v, err
+			}
+			lv.Append(ve)
+		}
+		return v, nil
+	case fd.IsMap():
+		var jsonObject map[string]json.RawMessage
+		if err := json.Unmarshal(in, &jsonObject); err != nil {
+			return v, err
+		}
+		kfd := fd.MapKey()
+		vfd := fd.MapValue()
+		mv := v.Map()
+		for key, raw := range jsonObject {
+			var kv protoreflect.MapKey
+			if kfd.Kind() == protoreflect.StringKind {
+				kv = protoreflect.ValueOf(key).MapKey()
+			} else {
+				v, err := u.unmarshalSingularValue(kfd.Default(), []byte(key), kfd)
+				if err != nil {
+					return v, err
+				}
+				kv = v.MapKey()
+			}
+
+			vv, err := u.unmarshalSingularValue(mv.NewValue(), raw, vfd)
+			if err != nil {
+				return v, err
+			}
+			mv.Set(kv, vv)
+		}
+		return v, nil
+	default:
+		return u.unmarshalSingularValue(v, in, fd)
+	}
+}
+
+var nonFinite = map[string]float64{
+	`"NaN"`:       math.NaN(),
+	`"Infinity"`:  math.Inf(+1),
+	`"-Infinity"`: math.Inf(-1),
+}
+
+func (u *Unmarshaler) unmarshalSingularValue(v protoreflect.Value, in []byte, fd protoreflect.FieldDescriptor) (protoreflect.Value, error) {
+	switch fd.Kind() {
+	case protoreflect.BoolKind:
+		return unmarshalValue(in, new(bool))
+	case protoreflect.Int32Kind, protoreflect.Sint32Kind, protoreflect.Sfixed32Kind:
+		return unmarshalValue(trimQuote(in), new(int32))
+	case protoreflect.Int64Kind, protoreflect.Sint64Kind, protoreflect.Sfixed64Kind:
+		return unmarshalValue(trimQuote(in), new(int64))
+	case protoreflect.Uint32Kind, protoreflect.Fixed32Kind:
+		return unmarshalValue(trimQuote(in), new(uint32))
+	case protoreflect.Uint64Kind, protoreflect.Fixed64Kind:
+		return unmarshalValue(trimQuote(in), new(uint64))
+	case protoreflect.FloatKind:
+		if f, ok := nonFinite[string(in)]; ok {
+			return protoreflect.ValueOfFloat32(float32(f)), nil
+		}
+		return unmarshalValue(trimQuote(in), new(float32))
+	case protoreflect.DoubleKind:
+		if f, ok := nonFinite[string(in)]; ok {
+			return protoreflect.ValueOfFloat64(float64(f)), nil
+		}
+		return unmarshalValue(trimQuote(in), new(float64))
+	case protoreflect.StringKind:
+		return unmarshalValue(in, new(string))
+	case protoreflect.BytesKind:
+		return unmarshalValue(in, new([]byte))
+	case protoreflect.EnumKind:
+		if hasPrefixAndSuffix('"', in, '"') {
+			vd := fd.Enum().Values().ByName(protoreflect.Name(trimQuote(in)))
+			if vd == nil {
+				return v, fmt.Errorf("unknown value %q for enum %s", in, fd.Enum().FullName())
+			}
+			return protoreflect.ValueOfEnum(vd.Number()), nil
+		}
+		return unmarshalValue(in, new(protoreflect.EnumNumber))
+	case protoreflect.MessageKind, protoreflect.GroupKind:
+		err := u.unmarshalMessage(v.Message(), in)
+		return v, err
+	default:
+		panic(fmt.Sprintf("invalid kind %v", fd.Kind()))
+	}
+}
+
+func unmarshalValue(in []byte, v interface{}) (protoreflect.Value, error) {
+	err := json.Unmarshal(in, v)
+	return protoreflect.ValueOf(reflect.ValueOf(v).Elem().Interface()), err
+}
+
+func unquoteString(in string) (out string, err error) {
+	err = json.Unmarshal([]byte(in), &out)
+	return out, err
+}
+
+func hasPrefixAndSuffix(prefix byte, in []byte, suffix byte) bool {
+	if len(in) >= 2 && in[0] == prefix && in[len(in)-1] == suffix {
+		return true
+	}
+	return false
+}
+
+// trimQuote is like unquoteString but simply strips surrounding quotes.
+// This is incorrect, but is behavior done by the legacy implementation.
+func trimQuote(in []byte) []byte {
+	if len(in) >= 2 && in[0] == '"' && in[len(in)-1] == '"' {
+		in = in[1 : len(in)-1]
+	}
+	return in
+}
diff --git a/vendor/github.com/golang/protobuf/jsonpb/encode.go b/vendor/github.com/golang/protobuf/jsonpb/encode.go
new file mode 100644
index 000000000..685c80a62
--- /dev/null
+++ b/vendor/github.com/golang/protobuf/jsonpb/encode.go
@@ -0,0 +1,559 @@
+// Copyright 2015 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package jsonpb
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"math"
+	"reflect"
+	"sort"
+	"strconv"
+	"strings"
+	"time"
+
+	"github.com/golang/protobuf/proto"
+	"google.golang.org/protobuf/encoding/protojson"
+	protoV2 "google.golang.org/protobuf/proto"
+	"google.golang.org/protobuf/reflect/protoreflect"
+	"google.golang.org/protobuf/reflect/protoregistry"
+)
+
+const wrapJSONMarshalV2 = false
+
+// Marshaler is a configurable object for marshaling protocol buffer messages
+// to the specified JSON representation.
+type Marshaler struct {
+	// OrigName specifies whether to use the original protobuf name for fields.
+	OrigName bool
+
+	// EnumsAsInts specifies whether to render enum values as integers,
+	// as opposed to string values.
+	EnumsAsInts bool
+
+	// EmitDefaults specifies whether to render fields with zero values.
+	EmitDefaults bool
+
+	// Indent controls whether the output is compact or not.
+	// If empty, the output is compact JSON. Otherwise, every JSON object
+	// entry and JSON array value will be on its own line.
+	// Each line will be preceded by repeated copies of Indent, where the
+	// number of copies is the current indentation depth.
+	Indent string
+
+	// AnyResolver is used to resolve the google.protobuf.Any well-known type.
+	// If unset, the global registry is used by default.
+	AnyResolver AnyResolver
+}
+
+// JSONPBMarshaler is implemented by protobuf messages that customize the
+// way they are marshaled to JSON. Messages that implement this should also
+// implement JSONPBUnmarshaler so that the custom format can be parsed.
+//
+// The JSON marshaling must follow the proto to JSON specification:
+//	https://developers.google.com/protocol-buffers/docs/proto3#json
+//
+// Deprecated: Custom types should implement protobuf reflection instead.
+type JSONPBMarshaler interface {
+	MarshalJSONPB(*Marshaler) ([]byte, error)
+}
+
+// Marshal serializes a protobuf message as JSON into w.
+func (jm *Marshaler) Marshal(w io.Writer, m proto.Message) error {
+	b, err := jm.marshal(m)
+	if len(b) > 0 {
+		if _, err := w.Write(b); err != nil {
+			return err
+		}
+	}
+	return err
+}
+
+// MarshalToString serializes a protobuf message as JSON in string form.
+func (jm *Marshaler) MarshalToString(m proto.Message) (string, error) {
+	b, err := jm.marshal(m)
+	if err != nil {
+		return "", err
+	}
+	return string(b), nil
+}
+
+func (jm *Marshaler) marshal(m proto.Message) ([]byte, error) {
+	v := reflect.ValueOf(m)
+	if m == nil || (v.Kind() == reflect.Ptr && v.IsNil()) {
+		return nil, errors.New("Marshal called with nil")
+	}
+
+	// Check for custom marshalers first since they may not properly
+	// implement protobuf reflection that the logic below relies on.
+	if jsm, ok := m.(JSONPBMarshaler); ok {
+		return jsm.MarshalJSONPB(jm)
+	}
+
+	if wrapJSONMarshalV2 {
+		opts := protojson.MarshalOptions{
+			UseProtoNames:   jm.OrigName,
+			UseEnumNumbers:  jm.EnumsAsInts,
+			EmitUnpopulated: jm.EmitDefaults,
+			Indent:          jm.Indent,
+		}
+		if jm.AnyResolver != nil {
+			opts.Resolver = anyResolver{jm.AnyResolver}
+		}
+		return opts.Marshal(proto.MessageReflect(m).Interface())
+	} else {
+		// Check for unpopulated required fields first.
+		m2 := proto.MessageReflect(m)
+		if err := protoV2.CheckInitialized(m2.Interface()); err != nil {
+			return nil, err
+		}
+
+		w := jsonWriter{Marshaler: jm}
+		err := w.marshalMessage(m2, "", "")
+		return w.buf, err
+	}
+}
+
+type jsonWriter struct {
+	*Marshaler
+	buf []byte
+}
+
+func (w *jsonWriter) write(s string) {
+	w.buf = append(w.buf, s...)
+}
+
+func (w *jsonWriter) marshalMessage(m protoreflect.Message, indent, typeURL string) error {
+	if jsm, ok := proto.MessageV1(m.Interface()).(JSONPBMarshaler); ok {
+		b, err := jsm.MarshalJSONPB(w.Marshaler)
+		if err != nil {
+			return err
+		}
+		if typeURL != "" {
+			// we are marshaling this object to an Any type
+			var js map[string]*json.RawMessage
+			if err = json.Unmarshal(b, &js); err != nil {
+				return fmt.Errorf("type %T produced invalid JSON: %v", m.Interface(), err)
+			}
+			turl, err := json.Marshal(typeURL)
+			if err != nil {
+				return fmt.Errorf("failed to marshal type URL %q to JSON: %v", typeURL, err)
+			}
+			js["@type"] = (*json.RawMessage)(&turl)
+			if b, err = json.Marshal(js); err != nil {
+				return err
+			}
+		}
+		w.write(string(b))
+		return nil
+	}
+
+	md := m.Descriptor()
+	fds := md.Fields()
+
+	// Handle well-known types.
+	const secondInNanos = int64(time.Second / time.Nanosecond)
+	switch wellKnownType(md.FullName()) {
+	case "Any":
+		return w.marshalAny(m, indent)
+	case "BoolValue", "BytesValue", "StringValue",
+		"Int32Value", "UInt32Value", "FloatValue",
+		"Int64Value", "UInt64Value", "DoubleValue":
+		fd := fds.ByNumber(1)
+		return w.marshalValue(fd, m.Get(fd), indent)
+	case "Duration":
+		const maxSecondsInDuration = 315576000000
+		// "Generated output always contains 0, 3, 6, or 9 fractional digits,
+		//  depending on required precision."
+		s := m.Get(fds.ByNumber(1)).Int()
+		ns := m.Get(fds.ByNumber(2)).Int()
+		if s < -maxSecondsInDuration || s > maxSecondsInDuration {
+			return fmt.Errorf("seconds out of range %v", s)
+		}
+		if ns <= -secondInNanos || ns >= secondInNanos {
+			return fmt.Errorf("ns out of range (%v, %v)", -secondInNanos, secondInNanos)
+		}
+		if (s > 0 && ns < 0) || (s < 0 && ns > 0) {
+			return errors.New("signs of seconds and nanos do not match")
+		}
+		var sign string
+		if s < 0 || ns < 0 {
+			sign, s, ns = "-", -1*s, -1*ns
+		}
+		x := fmt.Sprintf("%s%d.%09d", sign, s, ns)
+		x = strings.TrimSuffix(x, "000")
+		x = strings.TrimSuffix(x, "000")
+		x = strings.TrimSuffix(x, ".000")
+		w.write(fmt.Sprintf(`"%vs"`, x))
+		return nil
+	case "Timestamp":
+		// "RFC 3339, where generated output will always be Z-normalized
+		//  and uses 0, 3, 6 or 9 fractional digits."
+		s := m.Get(fds.ByNumber(1)).Int()
+		ns := m.Get(fds.ByNumber(2)).Int()
+		if ns < 0 || ns >= secondInNanos {
+			return fmt.Errorf("ns out of range [0, %v)", secondInNanos)
+		}
+		t := time.Unix(s, ns).UTC()
+		// time.RFC3339Nano isn't exactly right (we need to get 3/6/9 fractional digits).
+		x := t.Format("2006-01-02T15:04:05.000000000")
+		x = strings.TrimSuffix(x, "000")
+		x = strings.TrimSuffix(x, "000")
+		x = strings.TrimSuffix(x, ".000")
+		w.write(fmt.Sprintf(`"%vZ"`, x))
+		return nil
+	case "Value":
+		// JSON value; which is a null, number, string, bool, object, or array.
+		od := md.Oneofs().Get(0)
+		fd := m.WhichOneof(od)
+		if fd == nil {
+			return errors.New("nil Value")
+		}
+		return w.marshalValue(fd, m.Get(fd), indent)
+	case "Struct", "ListValue":
+		// JSON object or array.
+		fd := fds.ByNumber(1)
+		return w.marshalValue(fd, m.Get(fd), indent)
+	}
+
+	w.write("{")
+	if w.Indent != "" {
+		w.write("\n")
+	}
+
+	firstField := true
+	if typeURL != "" {
+		if err := w.marshalTypeURL(indent, typeURL); err != nil {
+			return err
+		}
+		firstField = false
+	}
+
+	for i := 0; i < fds.Len(); {
+		fd := fds.Get(i)
+		if od := fd.ContainingOneof(); od != nil {
+			fd = m.WhichOneof(od)
+			i += od.Fields().Len()
+			if fd == nil {
+				continue
+			}
+		} else {
+			i++
+		}
+
+		v := m.Get(fd)
+
+		if !m.Has(fd) {
+			if !w.EmitDefaults || fd.ContainingOneof() != nil {
+				continue
+			}
+			if fd.Cardinality() != protoreflect.Repeated && (fd.Message() != nil || fd.Syntax() == protoreflect.Proto2) {
+				v = protoreflect.Value{} // use "null" for singular messages or proto2 scalars
+			}
+		}
+
+		if !firstField {
+			w.writeComma()
+		}
+		if err := w.marshalField(fd, v, indent); err != nil {
+			return err
+		}
+		firstField = false
+	}
+
+	// Handle proto2 extensions.
+	if md.ExtensionRanges().Len() > 0 {
+		// Collect a sorted list of all extension descriptor and values.
+		type ext struct {
+			desc protoreflect.FieldDescriptor
+			val  protoreflect.Value
+		}
+		var exts []ext
+		m.Range(func(fd protoreflect.FieldDescriptor, v protoreflect.Value) bool {
+			if fd.IsExtension() {
+				exts = append(exts, ext{fd, v})
+			}
+			return true
+		})
+		sort.Slice(exts, func(i, j int) bool {
+			return exts[i].desc.Number() < exts[j].desc.Number()
+		})
+
+		for _, ext := range exts {
+			if !firstField {
+				w.writeComma()
+			}
+			if err := w.marshalField(ext.desc, ext.val, indent); err != nil {
+				return err
+			}
+			firstField = false
+		}
+	}
+
+	if w.Indent != "" {
+		w.write("\n")
+		w.write(indent)
+	}
+	w.write("}")
+	return nil
+}
+
+func (w *jsonWriter) writeComma() {
+	if w.Indent != "" {
+		w.write(",\n")
+	} else {
+		w.write(",")
+	}
+}
+
+func (w *jsonWriter) marshalAny(m protoreflect.Message, indent string) error {
+	// "If the Any contains a value that has a special JSON mapping,
+	//  it will be converted as follows: {"@type": xxx, "value": yyy}.
+	//  Otherwise, the value will be converted into a JSON object,
+	//  and the "@type" field will be inserted to indicate the actual data type."
+	md := m.Descriptor()
+	typeURL := m.Get(md.Fields().ByNumber(1)).String()
+	rawVal := m.Get(md.Fields().ByNumber(2)).Bytes()
+
+	var m2 protoreflect.Message
+	if w.AnyResolver != nil {
+		mi, err := w.AnyResolver.Resolve(typeURL)
+		if err != nil {
+			return err
+		}
+		m2 = proto.MessageReflect(mi)
+	} else {
+		mt, err := protoregistry.GlobalTypes.FindMessageByURL(typeURL)
+		if err != nil {
+			return err
+		}
+		m2 = mt.New()
+	}
+
+	if err := protoV2.Unmarshal(rawVal, m2.Interface()); err != nil {
+		return err
+	}
+
+	if wellKnownType(m2.Descriptor().FullName()) == "" {
+		return w.marshalMessage(m2, indent, typeURL)
+	}
+
+	w.write("{")
+	if w.Indent != "" {
+		w.write("\n")
+	}
+	if err := w.marshalTypeURL(indent, typeURL); err != nil {
+		return err
+	}
+	w.writeComma()
+	if w.Indent != "" {
+		w.write(indent)
+		w.write(w.Indent)
+		w.write(`"value": `)
+	} else {
+		w.write(`"value":`)
+	}
+	if err := w.marshalMessage(m2, indent+w.Indent, ""); err != nil {
+		return err
+	}
+	if w.Indent != "" {
+		w.write("\n")
+		w.write(indent)
+	}
+	w.write("}")
+	return nil
+}
+
+func (w *jsonWriter) marshalTypeURL(indent, typeURL string) error {
+	if w.Indent != "" {
+		w.write(indent)
+		w.write(w.Indent)
+	}
+	w.write(`"@type":`)
+	if w.Indent != "" {
+		w.write(" ")
+	}
+	b, err := json.Marshal(typeURL)
+	if err != nil {
+		return err
+	}
+	w.write(string(b))
+	return nil
+}
+
+// marshalField writes field description and value to the Writer.
+func (w *jsonWriter) marshalField(fd protoreflect.FieldDescriptor, v protoreflect.Value, indent string) error {
+	if w.Indent != "" {
+		w.write(indent)
+		w.write(w.Indent)
+	}
+	w.write(`"`)
+	switch {
+	case fd.IsExtension():
+		// For message set, use the fname of the message as the extension name.
+		name := string(fd.FullName())
+		if isMessageSet(fd.ContainingMessage()) {
+			name = strings.TrimSuffix(name, ".message_set_extension")
+		}
+
+		w.write("[" + name + "]")
+	case w.OrigName:
+		name := string(fd.Name())
+		if fd.Kind() == protoreflect.GroupKind {
+			name = string(fd.Message().Name())
+		}
+		w.write(name)
+	default:
+		w.write(string(fd.JSONName()))
+	}
+	w.write(`":`)
+	if w.Indent != "" {
+		w.write(" ")
+	}
+	return w.marshalValue(fd, v, indent)
+}
+
+func (w *jsonWriter) marshalValue(fd protoreflect.FieldDescriptor, v protoreflect.Value, indent string) error {
+	switch {
+	case fd.IsList():
+		w.write("[")
+		comma := ""
+		lv := v.List()
+		for i := 0; i < lv.Len(); i++ {
+			w.write(comma)
+			if w.Indent != "" {
+				w.write("\n")
+				w.write(indent)
+				w.write(w.Indent)
+				w.write(w.Indent)
+			}
+			if err := w.marshalSingularValue(fd, lv.Get(i), indent+w.Indent); err != nil {
+				return err
+			}
+			comma = ","
+		}
+		if w.Indent != "" {
+			w.write("\n")
+			w.write(indent)
+			w.write(w.Indent)
+		}
+		w.write("]")
+		return nil
+	case fd.IsMap():
+		kfd := fd.MapKey()
+		vfd := fd.MapValue()
+		mv := v.Map()
+
+		// Collect a sorted list of all map keys and values.
+		type entry struct{ key, val protoreflect.Value }
+		var entries []entry
+		mv.Range(func(k protoreflect.MapKey, v protoreflect.Value) bool {
+			entries = append(entries, entry{k.Value(), v})
+			return true
+		})
+		sort.Slice(entries, func(i, j int) bool {
+			switch kfd.Kind() {
+			case protoreflect.BoolKind:
+				return !entries[i].key.Bool() && entries[j].key.Bool()
+			case protoreflect.Int32Kind, protoreflect.Sint32Kind, protoreflect.Sfixed32Kind, protoreflect.Int64Kind, protoreflect.Sint64Kind, protoreflect.Sfixed64Kind:
+				return entries[i].key.Int() < entries[j].key.Int()
+			case protoreflect.Uint32Kind, protoreflect.Fixed32Kind, protoreflect.Uint64Kind, protoreflect.Fixed64Kind:
+				return entries[i].key.Uint() < entries[j].key.Uint()
+			case protoreflect.StringKind:
+				return entries[i].key.String() < entries[j].key.String()
+			default:
+				panic("invalid kind")
+			}
+		})
+
+		w.write(`{`)
+		comma := ""
+		for _, entry := range entries {
+			w.write(comma)
+			if w.Indent != "" {
+				w.write("\n")
+				w.write(indent)
+				w.write(w.Indent)
+				w.write(w.Indent)
+			}
+
+			s := fmt.Sprint(entry.key.Interface())
+			b, err := json.Marshal(s)
+			if err != nil {
+				return err
+			}
+			w.write(string(b))
+
+			w.write(`:`)
+			if w.Indent != "" {
+				w.write(` `)
+			}
+
+			if err := w.marshalSingularValue(vfd, entry.val, indent+w.Indent); err != nil {
+				return err
+			}
+			comma = ","
+		}
+		if w.Indent != "" {
+			w.write("\n")
+			w.write(indent)
+			w.write(w.Indent)
+		}
+		w.write(`}`)
+		return nil
+	default:
+		return w.marshalSingularValue(fd, v, indent)
+	}
+}
+
+func (w *jsonWriter) marshalSingularValue(fd protoreflect.FieldDescriptor, v protoreflect.Value, indent string) error {
+	switch {
+	case !v.IsValid():
+		w.write("null")
+		return nil
+	case fd.Message() != nil:
+		return w.marshalMessage(v.Message(), indent+w.Indent, "")
+	case fd.Enum() != nil:
+		if fd.Enum().FullName() == "google.protobuf.NullValue" {
+			w.write("null")
+			return nil
+		}
+
+		vd := fd.Enum().Values().ByNumber(v.Enum())
+		if vd == nil || w.EnumsAsInts {
+			w.write(strconv.Itoa(int(v.Enum())))
+		} else {
+			w.write(`"` + string(vd.Name()) + `"`)
+		}
+		return nil
+	default:
+		switch v.Interface().(type) {
+		case float32, float64:
+			switch {
+			case math.IsInf(v.Float(), +1):
+				w.write(`"Infinity"`)
+				return nil
+			case math.IsInf(v.Float(), -1):
+				w.write(`"-Infinity"`)
+				return nil
+			case math.IsNaN(v.Float()):
+				w.write(`"NaN"`)
+				return nil
+			}
+		case int64, uint64:
+			w.write(fmt.Sprintf(`"%d"`, v.Interface()))
+			return nil
+		}
+
+		b, err := json.Marshal(v.Interface())
+		if err != nil {
+			return err
+		}
+		w.write(string(b))
+		return nil
+	}
+}
diff --git a/vendor/github.com/golang/protobuf/jsonpb/json.go b/vendor/github.com/golang/protobuf/jsonpb/json.go
new file mode 100644
index 000000000..480e2448d
--- /dev/null
+++ b/vendor/github.com/golang/protobuf/jsonpb/json.go
@@ -0,0 +1,69 @@
+// Copyright 2015 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package jsonpb provides functionality to marshal and unmarshal between a
+// protocol buffer message and JSON. It follows the specification at
+// https://developers.google.com/protocol-buffers/docs/proto3#json.
+//
+// Do not rely on the default behavior of the standard encoding/json package
+// when called on generated message types as it does not operate correctly.
+//
+// Deprecated: Use the "google.golang.org/protobuf/encoding/protojson"
+// package instead.
+package jsonpb
+
+import (
+	"github.com/golang/protobuf/proto"
+	"google.golang.org/protobuf/reflect/protoreflect"
+	"google.golang.org/protobuf/reflect/protoregistry"
+	"google.golang.org/protobuf/runtime/protoimpl"
+)
+
+// AnyResolver takes a type URL, present in an Any message,
+// and resolves it into an instance of the associated message.
+type AnyResolver interface {
+	Resolve(typeURL string) (proto.Message, error)
+}
+
+type anyResolver struct{ AnyResolver }
+
+func (r anyResolver) FindMessageByName(message protoreflect.FullName) (protoreflect.MessageType, error) {
+	return r.FindMessageByURL(string(message))
+}
+
+func (r anyResolver) FindMessageByURL(url string) (protoreflect.MessageType, error) {
+	m, err := r.Resolve(url)
+	if err != nil {
+		return nil, err
+	}
+	return protoimpl.X.MessageTypeOf(m), nil
+}
+
+func (r anyResolver) FindExtensionByName(field protoreflect.FullName) (protoreflect.ExtensionType, error) {
+	return protoregistry.GlobalTypes.FindExtensionByName(field)
+}
+
+func (r anyResolver) FindExtensionByNumber(message protoreflect.FullName, field protoreflect.FieldNumber) (protoreflect.ExtensionType, error) {
+	return protoregistry.GlobalTypes.FindExtensionByNumber(message, field)
+}
+
+func wellKnownType(s protoreflect.FullName) string {
+	if s.Parent() == "google.protobuf" {
+		switch s.Name() {
+		case "Empty", "Any",
+			"BoolValue", "BytesValue", "StringValue",
+			"Int32Value", "UInt32Value", "FloatValue",
+			"Int64Value", "UInt64Value", "DoubleValue",
+			"Duration", "Timestamp",
+			"NullValue", "Struct", "Value", "ListValue":
+			return string(s.Name())
+		}
+	}
+	return ""
+}
+
+func isMessageSet(md protoreflect.MessageDescriptor) bool {
+	ms, ok := md.(interface{ IsMessageSet() bool })
+	return ok && ms.IsMessageSet()
+}
diff --git a/vendor/github.com/golang/protobuf/protoc-gen-go/descriptor/descriptor.pb.go b/vendor/github.com/golang/protobuf/protoc-gen-go/descriptor/descriptor.pb.go
new file mode 100644
index 000000000..63dc05785
--- /dev/null
+++ b/vendor/github.com/golang/protobuf/protoc-gen-go/descriptor/descriptor.pb.go
@@ -0,0 +1,200 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: github.com/golang/protobuf/protoc-gen-go/descriptor/descriptor.proto
+
+package descriptor
+
+import (
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	descriptorpb "google.golang.org/protobuf/types/descriptorpb"
+	reflect "reflect"
+)
+
+// Symbols defined in public import of google/protobuf/descriptor.proto.
+
+type FieldDescriptorProto_Type = descriptorpb.FieldDescriptorProto_Type
+
+const FieldDescriptorProto_TYPE_DOUBLE = descriptorpb.FieldDescriptorProto_TYPE_DOUBLE
+const FieldDescriptorProto_TYPE_FLOAT = descriptorpb.FieldDescriptorProto_TYPE_FLOAT
+const FieldDescriptorProto_TYPE_INT64 = descriptorpb.FieldDescriptorProto_TYPE_INT64
+const FieldDescriptorProto_TYPE_UINT64 = descriptorpb.FieldDescriptorProto_TYPE_UINT64
+const FieldDescriptorProto_TYPE_INT32 = descriptorpb.FieldDescriptorProto_TYPE_INT32
+const FieldDescriptorProto_TYPE_FIXED64 = descriptorpb.FieldDescriptorProto_TYPE_FIXED64
+const FieldDescriptorProto_TYPE_FIXED32 = descriptorpb.FieldDescriptorProto_TYPE_FIXED32
+const FieldDescriptorProto_TYPE_BOOL = descriptorpb.FieldDescriptorProto_TYPE_BOOL
+const FieldDescriptorProto_TYPE_STRING = descriptorpb.FieldDescriptorProto_TYPE_STRING
+const FieldDescriptorProto_TYPE_GROUP = descriptorpb.FieldDescriptorProto_TYPE_GROUP
+const FieldDescriptorProto_TYPE_MESSAGE = descriptorpb.FieldDescriptorProto_TYPE_MESSAGE
+const FieldDescriptorProto_TYPE_BYTES = descriptorpb.FieldDescriptorProto_TYPE_BYTES
+const FieldDescriptorProto_TYPE_UINT32 = descriptorpb.FieldDescriptorProto_TYPE_UINT32
+const FieldDescriptorProto_TYPE_ENUM = descriptorpb.FieldDescriptorProto_TYPE_ENUM
+const FieldDescriptorProto_TYPE_SFIXED32 = descriptorpb.FieldDescriptorProto_TYPE_SFIXED32
+const FieldDescriptorProto_TYPE_SFIXED64 = descriptorpb.FieldDescriptorProto_TYPE_SFIXED64
+const FieldDescriptorProto_TYPE_SINT32 = descriptorpb.FieldDescriptorProto_TYPE_SINT32
+const FieldDescriptorProto_TYPE_SINT64 = descriptorpb.FieldDescriptorProto_TYPE_SINT64
+
+var FieldDescriptorProto_Type_name = descriptorpb.FieldDescriptorProto_Type_name
+var FieldDescriptorProto_Type_value = descriptorpb.FieldDescriptorProto_Type_value
+
+type FieldDescriptorProto_Label = descriptorpb.FieldDescriptorProto_Label
+
+const FieldDescriptorProto_LABEL_OPTIONAL = descriptorpb.FieldDescriptorProto_LABEL_OPTIONAL
+const FieldDescriptorProto_LABEL_REQUIRED = descriptorpb.FieldDescriptorProto_LABEL_REQUIRED
+const FieldDescriptorProto_LABEL_REPEATED = descriptorpb.FieldDescriptorProto_LABEL_REPEATED
+
+var FieldDescriptorProto_Label_name = descriptorpb.FieldDescriptorProto_Label_name
+var FieldDescriptorProto_Label_value = descriptorpb.FieldDescriptorProto_Label_value
+
+type FileOptions_OptimizeMode = descriptorpb.FileOptions_OptimizeMode
+
+const FileOptions_SPEED = descriptorpb.FileOptions_SPEED
+const FileOptions_CODE_SIZE = descriptorpb.FileOptions_CODE_SIZE
+const FileOptions_LITE_RUNTIME = descriptorpb.FileOptions_LITE_RUNTIME
+
+var FileOptions_OptimizeMode_name = descriptorpb.FileOptions_OptimizeMode_name
+var FileOptions_OptimizeMode_value = descriptorpb.FileOptions_OptimizeMode_value
+
+type FieldOptions_CType = descriptorpb.FieldOptions_CType
+
+const FieldOptions_STRING = descriptorpb.FieldOptions_STRING
+const FieldOptions_CORD = descriptorpb.FieldOptions_CORD
+const FieldOptions_STRING_PIECE = descriptorpb.FieldOptions_STRING_PIECE
+
+var FieldOptions_CType_name = descriptorpb.FieldOptions_CType_name
+var FieldOptions_CType_value = descriptorpb.FieldOptions_CType_value
+
+type FieldOptions_JSType = descriptorpb.FieldOptions_JSType
+
+const FieldOptions_JS_NORMAL = descriptorpb.FieldOptions_JS_NORMAL
+const FieldOptions_JS_STRING = descriptorpb.FieldOptions_JS_STRING
+const FieldOptions_JS_NUMBER = descriptorpb.FieldOptions_JS_NUMBER
+
+var FieldOptions_JSType_name = descriptorpb.FieldOptions_JSType_name
+var FieldOptions_JSType_value = descriptorpb.FieldOptions_JSType_value
+
+type MethodOptions_IdempotencyLevel = descriptorpb.MethodOptions_IdempotencyLevel
+
+const MethodOptions_IDEMPOTENCY_UNKNOWN = descriptorpb.MethodOptions_IDEMPOTENCY_UNKNOWN
+const MethodOptions_NO_SIDE_EFFECTS = descriptorpb.MethodOptions_NO_SIDE_EFFECTS
+const MethodOptions_IDEMPOTENT = descriptorpb.MethodOptions_IDEMPOTENT
+
+var MethodOptions_IdempotencyLevel_name = descriptorpb.MethodOptions_IdempotencyLevel_name
+var MethodOptions_IdempotencyLevel_value = descriptorpb.MethodOptions_IdempotencyLevel_value
+
+type FileDescriptorSet = descriptorpb.FileDescriptorSet
+type FileDescriptorProto = descriptorpb.FileDescriptorProto
+type DescriptorProto = descriptorpb.DescriptorProto
+type ExtensionRangeOptions = descriptorpb.ExtensionRangeOptions
+type FieldDescriptorProto = descriptorpb.FieldDescriptorProto
+type OneofDescriptorProto = descriptorpb.OneofDescriptorProto
+type EnumDescriptorProto = descriptorpb.EnumDescriptorProto
+type EnumValueDescriptorProto = descriptorpb.EnumValueDescriptorProto
+type ServiceDescriptorProto = descriptorpb.ServiceDescriptorProto
+type MethodDescriptorProto = descriptorpb.MethodDescriptorProto
+
+const Default_MethodDescriptorProto_ClientStreaming = descriptorpb.Default_MethodDescriptorProto_ClientStreaming
+const Default_MethodDescriptorProto_ServerStreaming = descriptorpb.Default_MethodDescriptorProto_ServerStreaming
+
+type FileOptions = descriptorpb.FileOptions
+
+const Default_FileOptions_JavaMultipleFiles = descriptorpb.Default_FileOptions_JavaMultipleFiles
+const Default_FileOptions_JavaStringCheckUtf8 = descriptorpb.Default_FileOptions_JavaStringCheckUtf8
+const Default_FileOptions_OptimizeFor = descriptorpb.Default_FileOptions_OptimizeFor
+const Default_FileOptions_CcGenericServices = descriptorpb.Default_FileOptions_CcGenericServices
+const Default_FileOptions_JavaGenericServices = descriptorpb.Default_FileOptions_JavaGenericServices
+const Default_FileOptions_PyGenericServices = descriptorpb.Default_FileOptions_PyGenericServices
+const Default_FileOptions_PhpGenericServices = descriptorpb.Default_FileOptions_PhpGenericServices
+const Default_FileOptions_Deprecated = descriptorpb.Default_FileOptions_Deprecated
+const Default_FileOptions_CcEnableArenas = descriptorpb.Default_FileOptions_CcEnableArenas
+
+type MessageOptions = descriptorpb.MessageOptions
+
+const Default_MessageOptions_MessageSetWireFormat = descriptorpb.Default_MessageOptions_MessageSetWireFormat
+const Default_MessageOptions_NoStandardDescriptorAccessor = descriptorpb.Default_MessageOptions_NoStandardDescriptorAccessor
+const Default_MessageOptions_Deprecated = descriptorpb.Default_MessageOptions_Deprecated
+
+type FieldOptions = descriptorpb.FieldOptions
+
+const Default_FieldOptions_Ctype = descriptorpb.Default_FieldOptions_Ctype
+const Default_FieldOptions_Jstype = descriptorpb.Default_FieldOptions_Jstype
+const Default_FieldOptions_Lazy = descriptorpb.Default_FieldOptions_Lazy
+const Default_FieldOptions_Deprecated = descriptorpb.Default_FieldOptions_Deprecated
+const Default_FieldOptions_Weak = descriptorpb.Default_FieldOptions_Weak
+
+type OneofOptions = descriptorpb.OneofOptions
+type EnumOptions = descriptorpb.EnumOptions
+
+const Default_EnumOptions_Deprecated = descriptorpb.Default_EnumOptions_Deprecated
+
+type EnumValueOptions = descriptorpb.EnumValueOptions
+
+const Default_EnumValueOptions_Deprecated = descriptorpb.Default_EnumValueOptions_Deprecated
+
+type ServiceOptions = descriptorpb.ServiceOptions
+
+const Default_ServiceOptions_Deprecated = descriptorpb.Default_ServiceOptions_Deprecated
+
+type MethodOptions = descriptorpb.MethodOptions
+
+const Default_MethodOptions_Deprecated = descriptorpb.Default_MethodOptions_Deprecated
+const Default_MethodOptions_IdempotencyLevel = descriptorpb.Default_MethodOptions_IdempotencyLevel
+
+type UninterpretedOption = descriptorpb.UninterpretedOption
+type SourceCodeInfo = descriptorpb.SourceCodeInfo
+type GeneratedCodeInfo = descriptorpb.GeneratedCodeInfo
+type DescriptorProto_ExtensionRange = descriptorpb.DescriptorProto_ExtensionRange
+type DescriptorProto_ReservedRange = descriptorpb.DescriptorProto_ReservedRange
+type EnumDescriptorProto_EnumReservedRange = descriptorpb.EnumDescriptorProto_EnumReservedRange
+type UninterpretedOption_NamePart = descriptorpb.UninterpretedOption_NamePart
+type SourceCodeInfo_Location = descriptorpb.SourceCodeInfo_Location
+type GeneratedCodeInfo_Annotation = descriptorpb.GeneratedCodeInfo_Annotation
+
+var File_github_com_golang_protobuf_protoc_gen_go_descriptor_descriptor_proto protoreflect.FileDescriptor
+
+var file_github_com_golang_protobuf_protoc_gen_go_descriptor_descriptor_proto_rawDesc = []byte{
+	0x0a, 0x44, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x67, 0x6f, 0x6c,
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+	0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x67, 0x6f, 0x6c, 0x61, 0x6e, 0x67, 0x2f, 0x70, 0x72,
+	0x6f, 0x74, 0x6f, 0x62, 0x75, 0x66, 0x2f, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x63, 0x2d, 0x67, 0x65,
+	0x6e, 0x2d, 0x67, 0x6f, 0x2f, 0x64, 0x65, 0x73, 0x63, 0x72, 0x69, 0x70, 0x74, 0x6f, 0x72, 0x3b,
+	0x64, 0x65, 0x73, 0x63, 0x72, 0x69, 0x70, 0x74, 0x6f, 0x72, 0x50, 0x00, 0x62, 0x06, 0x70, 0x72,
+	0x6f, 0x74, 0x6f, 0x32,
+}
+
+var file_github_com_golang_protobuf_protoc_gen_go_descriptor_descriptor_proto_goTypes = []interface{}{}
+var file_github_com_golang_protobuf_protoc_gen_go_descriptor_descriptor_proto_depIdxs = []int32{
+	0, // [0:0] is the sub-list for method output_type
+	0, // [0:0] is the sub-list for method input_type
+	0, // [0:0] is the sub-list for extension type_name
+	0, // [0:0] is the sub-list for extension extendee
+	0, // [0:0] is the sub-list for field type_name
+}
+
+func init() { file_github_com_golang_protobuf_protoc_gen_go_descriptor_descriptor_proto_init() }
+func file_github_com_golang_protobuf_protoc_gen_go_descriptor_descriptor_proto_init() {
+	if File_github_com_golang_protobuf_protoc_gen_go_descriptor_descriptor_proto != nil {
+		return
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_github_com_golang_protobuf_protoc_gen_go_descriptor_descriptor_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   0,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_github_com_golang_protobuf_protoc_gen_go_descriptor_descriptor_proto_goTypes,
+		DependencyIndexes: file_github_com_golang_protobuf_protoc_gen_go_descriptor_descriptor_proto_depIdxs,
+	}.Build()
+	File_github_com_golang_protobuf_protoc_gen_go_descriptor_descriptor_proto = out.File
+	file_github_com_golang_protobuf_protoc_gen_go_descriptor_descriptor_proto_rawDesc = nil
+	file_github_com_golang_protobuf_protoc_gen_go_descriptor_descriptor_proto_goTypes = nil
+	file_github_com_golang_protobuf_protoc_gen_go_descriptor_descriptor_proto_depIdxs = nil
+}
diff --git a/vendor/github.com/golang/protobuf/ptypes/wrappers/wrappers.pb.go b/vendor/github.com/golang/protobuf/ptypes/wrappers/wrappers.pb.go
new file mode 100644
index 000000000..cc40f27ad
--- /dev/null
+++ b/vendor/github.com/golang/protobuf/ptypes/wrappers/wrappers.pb.go
@@ -0,0 +1,71 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: github.com/golang/protobuf/ptypes/wrappers/wrappers.proto
+
+package wrappers
+
+import (
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	wrapperspb "google.golang.org/protobuf/types/known/wrapperspb"
+	reflect "reflect"
+)
+
+// Symbols defined in public import of google/protobuf/wrappers.proto.
+
+type DoubleValue = wrapperspb.DoubleValue
+type FloatValue = wrapperspb.FloatValue
+type Int64Value = wrapperspb.Int64Value
+type UInt64Value = wrapperspb.UInt64Value
+type Int32Value = wrapperspb.Int32Value
+type UInt32Value = wrapperspb.UInt32Value
+type BoolValue = wrapperspb.BoolValue
+type StringValue = wrapperspb.StringValue
+type BytesValue = wrapperspb.BytesValue
+
+var File_github_com_golang_protobuf_ptypes_wrappers_wrappers_proto protoreflect.FileDescriptor
+
+var file_github_com_golang_protobuf_ptypes_wrappers_wrappers_proto_rawDesc = []byte{
+	0x0a, 0x39, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x67, 0x6f, 0x6c,
+	0x61, 0x6e, 0x67, 0x2f, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x62, 0x75, 0x66, 0x2f, 0x70, 0x74, 0x79,
+	0x70, 0x65, 0x73, 0x2f, 0x77, 0x72, 0x61, 0x70, 0x70, 0x65, 0x72, 0x73, 0x2f, 0x77, 0x72, 0x61,
+	0x70, 0x70, 0x65, 0x72, 0x73, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x1a, 0x1e, 0x67, 0x6f, 0x6f,
+	0x67, 0x6c, 0x65, 0x2f, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x62, 0x75, 0x66, 0x2f, 0x77, 0x72, 0x61,
+	0x70, 0x70, 0x65, 0x72, 0x73, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x42, 0x35, 0x5a, 0x33, 0x67,
+	0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x67, 0x6f, 0x6c, 0x61, 0x6e, 0x67,
+	0x2f, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x62, 0x75, 0x66, 0x2f, 0x70, 0x74, 0x79, 0x70, 0x65, 0x73,
+	0x2f, 0x77, 0x72, 0x61, 0x70, 0x70, 0x65, 0x72, 0x73, 0x3b, 0x77, 0x72, 0x61, 0x70, 0x70, 0x65,
+	0x72, 0x73, 0x50, 0x00, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+}
+
+var file_github_com_golang_protobuf_ptypes_wrappers_wrappers_proto_goTypes = []interface{}{}
+var file_github_com_golang_protobuf_ptypes_wrappers_wrappers_proto_depIdxs = []int32{
+	0, // [0:0] is the sub-list for method output_type
+	0, // [0:0] is the sub-list for method input_type
+	0, // [0:0] is the sub-list for extension type_name
+	0, // [0:0] is the sub-list for extension extendee
+	0, // [0:0] is the sub-list for field type_name
+}
+
+func init() { file_github_com_golang_protobuf_ptypes_wrappers_wrappers_proto_init() }
+func file_github_com_golang_protobuf_ptypes_wrappers_wrappers_proto_init() {
+	if File_github_com_golang_protobuf_ptypes_wrappers_wrappers_proto != nil {
+		return
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_github_com_golang_protobuf_ptypes_wrappers_wrappers_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   0,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_github_com_golang_protobuf_ptypes_wrappers_wrappers_proto_goTypes,
+		DependencyIndexes: file_github_com_golang_protobuf_ptypes_wrappers_wrappers_proto_depIdxs,
+	}.Build()
+	File_github_com_golang_protobuf_ptypes_wrappers_wrappers_proto = out.File
+	file_github_com_golang_protobuf_ptypes_wrappers_wrappers_proto_rawDesc = nil
+	file_github_com_golang_protobuf_ptypes_wrappers_wrappers_proto_goTypes = nil
+	file_github_com_golang_protobuf_ptypes_wrappers_wrappers_proto_depIdxs = nil
+}
diff --git a/vendor/github.com/google/go-cmp/cmp/path.go b/vendor/github.com/google/go-cmp/cmp/path.go
index 3d45c1a47..f01eff318 100644
--- a/vendor/github.com/google/go-cmp/cmp/path.go
+++ b/vendor/github.com/google/go-cmp/cmp/path.go
@@ -315,7 +315,7 @@ func (tf Transform) Option() Option { return tf.trans }
 // pops the address from the stack. Thus, when traversing into a pointer from
 // reflect.Ptr, reflect.Slice element, or reflect.Map, we can detect cycles
 // by checking whether the pointer has already been visited. The cycle detection
-// uses a seperate stack for the x and y values.
+// uses a separate stack for the x and y values.
 //
 // If a cycle is detected we need to determine whether the two pointers
 // should be considered equal. The definition of equality chosen by Equal
diff --git a/vendor/github.com/google/go-cmp/cmp/report_slices.go b/vendor/github.com/google/go-cmp/cmp/report_slices.go
index 168f92f3c..2ad3bc85b 100644
--- a/vendor/github.com/google/go-cmp/cmp/report_slices.go
+++ b/vendor/github.com/google/go-cmp/cmp/report_slices.go
@@ -7,6 +7,7 @@ package cmp
 import (
 	"bytes"
 	"fmt"
+	"math"
 	"reflect"
 	"strconv"
 	"strings"
@@ -96,15 +97,16 @@ func (opts formatOptions) FormatDiffSlice(v *valueNode) textNode {
 	}
 
 	// Auto-detect the type of the data.
-	var isLinedText, isText, isBinary bool
 	var sx, sy string
+	var ssx, ssy []string
+	var isString, isMostlyText, isPureLinedText, isBinary bool
 	switch {
 	case t.Kind() == reflect.String:
 		sx, sy = vx.String(), vy.String()
-		isText = true // Initial estimate, verify later
+		isString = true
 	case t.Kind() == reflect.Slice && t.Elem() == reflect.TypeOf(byte(0)):
 		sx, sy = string(vx.Bytes()), string(vy.Bytes())
-		isBinary = true // Initial estimate, verify later
+		isString = true
 	case t.Kind() == reflect.Array:
 		// Arrays need to be addressable for slice operations to work.
 		vx2, vy2 := reflect.New(t).Elem(), reflect.New(t).Elem()
@@ -112,13 +114,12 @@ func (opts formatOptions) FormatDiffSlice(v *valueNode) textNode {
 		vy2.Set(vy)
 		vx, vy = vx2, vy2
 	}
-	if isText || isBinary {
-		var numLines, lastLineIdx, maxLineLen int
-		isBinary = !utf8.ValidString(sx) || !utf8.ValidString(sy)
+	if isString {
+		var numTotalRunes, numValidRunes, numLines, lastLineIdx, maxLineLen int
 		for i, r := range sx + sy {
-			if !(unicode.IsPrint(r) || unicode.IsSpace(r)) || r == utf8.RuneError {
-				isBinary = true
-				break
+			numTotalRunes++
+			if (unicode.IsPrint(r) || unicode.IsSpace(r)) && r != utf8.RuneError {
+				numValidRunes++
 			}
 			if r == '\n' {
 				if maxLineLen < i-lastLineIdx {
@@ -128,8 +129,26 @@ func (opts formatOptions) FormatDiffSlice(v *valueNode) textNode {
 				numLines++
 			}
 		}
-		isText = !isBinary
-		isLinedText = isText && numLines >= 4 && maxLineLen <= 1024
+		isPureText := numValidRunes == numTotalRunes
+		isMostlyText = float64(numValidRunes) > math.Floor(0.90*float64(numTotalRunes))
+		isPureLinedText = isPureText && numLines >= 4 && maxLineLen <= 1024
+		isBinary = !isMostlyText
+
+		// Avoid diffing by lines if it produces a significantly more complex
+		// edit script than diffing by bytes.
+		if isPureLinedText {
+			ssx = strings.Split(sx, "\n")
+			ssy = strings.Split(sy, "\n")
+			esLines := diff.Difference(len(ssx), len(ssy), func(ix, iy int) diff.Result {
+				return diff.BoolResult(ssx[ix] == ssy[iy])
+			})
+			esBytes := diff.Difference(len(sx), len(sy), func(ix, iy int) diff.Result {
+				return diff.BoolResult(sx[ix] == sy[iy])
+			})
+			efficiencyLines := float64(esLines.Dist()) / float64(len(esLines))
+			efficiencyBytes := float64(esBytes.Dist()) / float64(len(esBytes))
+			isPureLinedText = efficiencyLines < 4*efficiencyBytes
+		}
 	}
 
 	// Format the string into printable records.
@@ -138,9 +157,7 @@ func (opts formatOptions) FormatDiffSlice(v *valueNode) textNode {
 	switch {
 	// If the text appears to be multi-lined text,
 	// then perform differencing across individual lines.
-	case isLinedText:
-		ssx := strings.Split(sx, "\n")
-		ssy := strings.Split(sy, "\n")
+	case isPureLinedText:
 		list = opts.formatDiffSlice(
 			reflect.ValueOf(ssx), reflect.ValueOf(ssy), 1, "line",
 			func(v reflect.Value, d diffMode) textRecord {
@@ -229,7 +246,7 @@ func (opts formatOptions) FormatDiffSlice(v *valueNode) textNode {
 	// If the text appears to be single-lined text,
 	// then perform differencing in approximately fixed-sized chunks.
 	// The output is printed as quoted strings.
-	case isText:
+	case isMostlyText:
 		list = opts.formatDiffSlice(
 			reflect.ValueOf(sx), reflect.ValueOf(sy), 64, "byte",
 			func(v reflect.Value, d diffMode) textRecord {
@@ -237,7 +254,6 @@ func (opts formatOptions) FormatDiffSlice(v *valueNode) textNode {
 				return textRecord{Diff: d, Value: textLine(s)}
 			},
 		)
-		delim = ""
 
 	// If the text appears to be binary data,
 	// then perform differencing in approximately fixed-sized chunks.
@@ -299,7 +315,7 @@ func (opts formatOptions) FormatDiffSlice(v *valueNode) textNode {
 
 	// Wrap the output with appropriate type information.
 	var out textNode = &textWrap{Prefix: "{", Value: list, Suffix: "}"}
-	if !isText {
+	if !isMostlyText {
 		// The "{...}" byte-sequence literal is not valid Go syntax for strings.
 		// Emit the type for extra clarity (e.g. "string{...}").
 		if t.Kind() == reflect.String {
@@ -338,8 +354,11 @@ func (opts formatOptions) formatDiffSlice(
 	vx, vy reflect.Value, chunkSize int, name string,
 	makeRec func(reflect.Value, diffMode) textRecord,
 ) (list textList) {
-	es := diff.Difference(vx.Len(), vy.Len(), func(ix int, iy int) diff.Result {
-		return diff.BoolResult(vx.Index(ix).Interface() == vy.Index(iy).Interface())
+	eq := func(ix, iy int) bool {
+		return vx.Index(ix).Interface() == vy.Index(iy).Interface()
+	}
+	es := diff.Difference(vx.Len(), vy.Len(), func(ix, iy int) diff.Result {
+		return diff.BoolResult(eq(ix, iy))
 	})
 
 	appendChunks := func(v reflect.Value, d diffMode) int {
@@ -364,6 +383,7 @@ func (opts formatOptions) formatDiffSlice(
 
 	groups := coalesceAdjacentEdits(name, es)
 	groups = coalesceInterveningIdentical(groups, chunkSize/4)
+	groups = cleanupSurroundingIdentical(groups, eq)
 	maxGroup := diffStats{Name: name}
 	for i, ds := range groups {
 		if maxLen >= 0 && numDiffs >= maxLen {
@@ -416,25 +436,36 @@ func (opts formatOptions) formatDiffSlice(
 
 // coalesceAdjacentEdits coalesces the list of edits into groups of adjacent
 // equal or unequal counts.
+//
+// Example:
+//
+//	Input:  "..XXY...Y"
+//	Output: [
+//		{NumIdentical: 2},
+//		{NumRemoved: 2, NumInserted 1},
+//		{NumIdentical: 3},
+//		{NumInserted: 1},
+//	]
+//
 func coalesceAdjacentEdits(name string, es diff.EditScript) (groups []diffStats) {
-	var prevCase int // Arbitrary index into which case last occurred
-	lastStats := func(i int) *diffStats {
-		if prevCase != i {
+	var prevMode byte
+	lastStats := func(mode byte) *diffStats {
+		if prevMode != mode {
 			groups = append(groups, diffStats{Name: name})
-			prevCase = i
+			prevMode = mode
 		}
 		return &groups[len(groups)-1]
 	}
 	for _, e := range es {
 		switch e {
 		case diff.Identity:
-			lastStats(1).NumIdentical++
+			lastStats('=').NumIdentical++
 		case diff.UniqueX:
-			lastStats(2).NumRemoved++
+			lastStats('!').NumRemoved++
 		case diff.UniqueY:
-			lastStats(2).NumInserted++
+			lastStats('!').NumInserted++
 		case diff.Modified:
-			lastStats(2).NumModified++
+			lastStats('!').NumModified++
 		}
 	}
 	return groups
@@ -444,6 +475,35 @@ func coalesceAdjacentEdits(name string, es diff.EditScript) (groups []diffStats)
 // equal groups into adjacent unequal groups that currently result in a
 // dual inserted/removed printout. This acts as a high-pass filter to smooth
 // out high-frequency changes within the windowSize.
+//
+// Example:
+//
+//	WindowSize: 16,
+//	Input: [
+//		{NumIdentical: 61},              // group 0
+//		{NumRemoved: 3, NumInserted: 1}, // group 1
+//		{NumIdentical: 6},               // ├── coalesce
+//		{NumInserted: 2},                // ├── coalesce
+//		{NumIdentical: 1},               // ├── coalesce
+//		{NumRemoved: 9},                 // └── coalesce
+//		{NumIdentical: 64},              // group 2
+//		{NumRemoved: 3, NumInserted: 1}, // group 3
+//		{NumIdentical: 6},               // ├── coalesce
+//		{NumInserted: 2},                // ├── coalesce
+//		{NumIdentical: 1},               // ├── coalesce
+//		{NumRemoved: 7},                 // ├── coalesce
+//		{NumIdentical: 1},               // ├── coalesce
+//		{NumRemoved: 2},                 // └── coalesce
+//		{NumIdentical: 63},              // group 4
+//	]
+//	Output: [
+//		{NumIdentical: 61},
+//		{NumIdentical: 7, NumRemoved: 12, NumInserted: 3},
+//		{NumIdentical: 64},
+//		{NumIdentical: 8, NumRemoved: 12, NumInserted: 3},
+//		{NumIdentical: 63},
+//	]
+//
 func coalesceInterveningIdentical(groups []diffStats, windowSize int) []diffStats {
 	groups, groupsOrig := groups[:0], groups
 	for i, ds := range groupsOrig {
@@ -463,3 +523,91 @@ func coalesceInterveningIdentical(groups []diffStats, windowSize int) []diffStat
 	}
 	return groups
 }
+
+// cleanupSurroundingIdentical scans through all unequal groups, and
+// moves any leading sequence of equal elements to the preceding equal group and
+// moves and trailing sequence of equal elements to the succeeding equal group.
+//
+// This is necessary since coalesceInterveningIdentical may coalesce edit groups
+// together such that leading/trailing spans of equal elements becomes possible.
+// Note that this can occur even with an optimal diffing algorithm.
+//
+// Example:
+//
+//	Input: [
+//		{NumIdentical: 61},
+//		{NumIdentical: 1 , NumRemoved: 11, NumInserted: 2}, // assume 3 leading identical elements
+//		{NumIdentical: 67},
+//		{NumIdentical: 7, NumRemoved: 12, NumInserted: 3},  // assume 10 trailing identical elements
+//		{NumIdentical: 54},
+//	]
+//	Output: [
+//		{NumIdentical: 64}, // incremented by 3
+//		{NumRemoved: 9},
+//		{NumIdentical: 67},
+//		{NumRemoved: 9},
+//		{NumIdentical: 64}, // incremented by 10
+//	]
+//
+func cleanupSurroundingIdentical(groups []diffStats, eq func(i, j int) bool) []diffStats {
+	var ix, iy int // indexes into sequence x and y
+	for i, ds := range groups {
+		// Handle equal group.
+		if ds.NumDiff() == 0 {
+			ix += ds.NumIdentical
+			iy += ds.NumIdentical
+			continue
+		}
+
+		// Handle unequal group.
+		nx := ds.NumIdentical + ds.NumRemoved + ds.NumModified
+		ny := ds.NumIdentical + ds.NumInserted + ds.NumModified
+		var numLeadingIdentical, numTrailingIdentical int
+		for i := 0; i < nx && i < ny && eq(ix+i, iy+i); i++ {
+			numLeadingIdentical++
+		}
+		for i := 0; i < nx && i < ny && eq(ix+nx-1-i, iy+ny-1-i); i++ {
+			numTrailingIdentical++
+		}
+		if numIdentical := numLeadingIdentical + numTrailingIdentical; numIdentical > 0 {
+			if numLeadingIdentical > 0 {
+				// Remove leading identical span from this group and
+				// insert it into the preceding group.
+				if i-1 >= 0 {
+					groups[i-1].NumIdentical += numLeadingIdentical
+				} else {
+					// No preceding group exists, so prepend a new group,
+					// but do so after we finish iterating over all groups.
+					defer func() {
+						groups = append([]diffStats{{Name: groups[0].Name, NumIdentical: numLeadingIdentical}}, groups...)
+					}()
+				}
+				// Increment indexes since the preceding group would have handled this.
+				ix += numLeadingIdentical
+				iy += numLeadingIdentical
+			}
+			if numTrailingIdentical > 0 {
+				// Remove trailing identical span from this group and
+				// insert it into the succeeding group.
+				if i+1 < len(groups) {
+					groups[i+1].NumIdentical += numTrailingIdentical
+				} else {
+					// No succeeding group exists, so append a new group,
+					// but do so after we finish iterating over all groups.
+					defer func() {
+						groups = append(groups, diffStats{Name: groups[len(groups)-1].Name, NumIdentical: numTrailingIdentical})
+					}()
+				}
+				// Do not increment indexes since the succeeding group will handle this.
+			}
+
+			// Update this group since some identical elements were removed.
+			nx -= numIdentical
+			ny -= numIdentical
+			groups[i] = diffStats{Name: ds.Name, NumRemoved: nx, NumInserted: ny}
+		}
+		ix += nx
+		iy += ny
+	}
+	return groups
+}
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/.gitignore b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/.gitignore
new file mode 100644
index 000000000..c198e6a4c
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/.gitignore
@@ -0,0 +1,202 @@
+# Created by .ignore support plugin (hsz.mobi)
+### Go template
+# Compiled Object files, Static and Dynamic libs (Shared Objects)
+*.o
+*.a
+*.so
+
+# Folders
+_obj
+_test
+
+# Architecture specific extensions/prefixes
+*.[568vq]
+[568vq].out
+
+*.cgo1.go
+*.cgo2.c
+_cgo_defun.c
+_cgo_gotypes.go
+_cgo_export.*
+
+_testmain.go
+
+*.exe
+*.test
+*.prof
+### Windows template
+# Windows image file caches
+Thumbs.db
+ehthumbs.db
+
+# Folder config file
+Desktop.ini
+
+# Recycle Bin used on file shares
+$RECYCLE.BIN/
+
+# Windows Installer files
+*.cab
+*.msi
+*.msm
+*.msp
+
+# Windows shortcuts
+*.lnk
+### Kate template
+# Swap Files #
+.*.kate-swp
+.swp.*
+### SublimeText template
+# cache files for sublime text
+*.tmlanguage.cache
+*.tmPreferences.cache
+*.stTheme.cache
+
+# workspace files are user-specific
+*.sublime-workspace
+
+# project files should be checked into the repository, unless a significant
+# proportion of contributors will probably not be using SublimeText
+# *.sublime-project
+
+# sftp configuration file
+sftp-config.json
+### Linux template
+*~
+
+# temporary files which can be created if a process still has a handle open of a deleted file
+.fuse_hidden*
+
+# KDE directory preferences
+.directory
+
+# Linux trash folder which might appear on any partition or disk
+.Trash-*
+### JetBrains template
+# Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio and Webstorm
+# Reference: https://intellij-support.jetbrains.com/hc/en-us/articles/206544839
+
+# User-specific stuff:
+.idea
+.idea/tasks.xml
+.idea/dictionaries
+.idea/vcs.xml
+.idea/jsLibraryMappings.xml
+
+# Sensitive or high-churn files:
+.idea/dataSources.ids
+.idea/dataSources.xml
+.idea/dataSources.local.xml
+.idea/sqlDataSources.xml
+.idea/dynamic.xml
+.idea/uiDesigner.xml
+
+# Gradle:
+.idea/gradle.xml
+.idea/libraries
+
+# Mongo Explorer plugin:
+.idea/mongoSettings.xml
+
+## File-based project format:
+*.iws
+
+## Plugin-specific files:
+
+# IntelliJ
+/out/
+
+# mpeltonen/sbt-idea plugin
+.idea_modules/
+
+# JIRA plugin
+atlassian-ide-plugin.xml
+
+# Crashlytics plugin (for Android Studio and IntelliJ)
+com_crashlytics_export_strings.xml
+crashlytics.properties
+crashlytics-build.properties
+fabric.properties
+### Xcode template
+# Xcode
+#
+# gitignore contributors: remember to update Global/Xcode.gitignore, Objective-C.gitignore & Swift.gitignore
+
+## Build generated
+build/
+DerivedData/
+
+## Various settings
+*.pbxuser
+!default.pbxuser
+*.mode1v3
+!default.mode1v3
+*.mode2v3
+!default.mode2v3
+*.perspectivev3
+!default.perspectivev3
+xcuserdata/
+
+## Other
+*.moved-aside
+*.xccheckout
+*.xcscmblueprint
+### Eclipse template
+
+.metadata
+bin/
+tmp/
+*.tmp
+*.bak
+*.swp
+*~.nib
+local.properties
+.settings/
+.loadpath
+.recommenders
+
+# Eclipse Core
+.project
+
+# External tool builders
+.externalToolBuilders/
+
+# Locally stored "Eclipse launch configurations"
+*.launch
+
+# PyDev specific (Python IDE for Eclipse)
+*.pydevproject
+
+# CDT-specific (C/C++ Development Tooling)
+.cproject
+
+# JDT-specific (Eclipse Java Development Tools)
+.classpath
+
+# Java annotation processor (APT)
+.factorypath
+
+# PDT-specific (PHP Development Tools)
+.buildpath
+
+# sbteclipse plugin
+.target
+
+# Tern plugin
+.tern-project
+
+# TeXlipse plugin
+.texlipse
+
+# STS (Spring Tool Suite)
+.springBeans
+
+# Code Recommenders
+.recommenders/
+
+
+coverage.txt
+
+#vendor
+vendor/
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/.travis.yml b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/.travis.yml
new file mode 100644
index 000000000..702fa5b72
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/.travis.yml
@@ -0,0 +1,21 @@
+sudo: false
+language: go
+go:
+  - 1.8.x
+env:
+  - DEP_VERSION="0.3.2"
+
+before_install:
+  # Download the binary to bin folder in $GOPATH
+  - curl -L -s https://github.com/golang/dep/releases/download/v${DEP_VERSION}/dep-linux-amd64 -o $GOPATH/bin/dep
+  # Make the binary executable
+  - chmod +x $GOPATH/bin/dep
+
+install:
+  - dep ensure
+
+script:
+ - make test
+ 
+after_success:
+  - bash <(curl -s https://codecov.io/bash)
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/CHANGELOG.md b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/CHANGELOG.md
new file mode 100644
index 000000000..0e64822d2
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/CHANGELOG.md
@@ -0,0 +1,30 @@
+# Changelog
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
+and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
+
+Types of changes:
+- `Added` for new features.
+- `Changed` for changes in existing functionality.
+- `Deprecated` for soon-to-be removed features.
+- `Removed` for now removed features.
+- `Fixed` for any bug fixes.
+- `Security` in case of vulnerabilities.
+
+## [Unreleased]
+### Added
+- This CHANGELOG file to keep track of changes.
+
+## 1.0.0 - 2018-05-08
+### Added
+- grpc_auth 
+- grpc_ctxtags
+- grpc_zap
+- grpc_logrus
+- grpc_opentracing
+- grpc_retry
+- grpc_validator
+- grpc_recovery
+
+[Unreleased]: https://github.com/grpc-ecosystem/go-grpc-middleware/compare/v1.0.0...HEAD 
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/CONTRIBUTING.md b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/CONTRIBUTING.md
new file mode 100644
index 000000000..dd52ab893
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/CONTRIBUTING.md
@@ -0,0 +1,20 @@
+# Contributing
+
+We would love to have people submit pull requests and help make `grpc-ecosystem/go-grpc-middleware` even better 👍.
+
+Fork, then clone the repo:
+
+```bash
+git clone git@github.com:your-username/go-grpc-middleware.git
+```    
+
+Before checking in please run the following:
+
+```bash
+make all
+```
+
+This will `vet`, `fmt`, regenerate documentation and run all tests.
+
+
+Push to your fork and open a pull request.
\ No newline at end of file
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/Gopkg.lock b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/Gopkg.lock
new file mode 100644
index 000000000..ebdcb75a8
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/Gopkg.lock
@@ -0,0 +1,123 @@
+# This file is autogenerated, do not edit; changes may be undone by the next 'dep ensure'.
+
+
+[[projects]]
+  name = "cloud.google.com/go"
+  packages = ["compute/metadata"]
+  revision = "2d3a6656c17a60b0815b7e06ab0be04eacb6e613"
+  version = "v0.16.0"
+
+[[projects]]
+  name = "github.com/davecgh/go-spew"
+  packages = ["spew"]
+  revision = "346938d642f2ec3594ed81d874461961cd0faa76"
+  version = "v1.1.0"
+
+[[projects]]
+  name = "github.com/gogo/protobuf"
+  packages = ["gogoproto","proto","protoc-gen-gogo/descriptor"]
+  revision = "342cbe0a04158f6dcb03ca0079991a51a4248c02"
+  version = "v0.5"
+
+[[projects]]
+  branch = "master"
+  name = "github.com/golang/protobuf"
+  packages = ["jsonpb","proto","ptypes","ptypes/any","ptypes/duration","ptypes/struct","ptypes/timestamp"]
+  revision = "1e59b77b52bf8e4b449a57e6f79f21226d571845"
+
+[[projects]]
+  name = "github.com/opentracing/opentracing-go"
+  packages = [".","ext","log","mocktracer"]
+  revision = "1949ddbfd147afd4d964a9f00b24eb291e0e7c38"
+  version = "v1.0.2"
+
+[[projects]]
+  name = "github.com/pmezard/go-difflib"
+  packages = ["difflib"]
+  revision = "792786c7400a136282c1664665ae0a8db921c6c2"
+  version = "v1.0.0"
+
+[[projects]]
+  name = "github.com/sirupsen/logrus"
+  packages = ["."]
+  revision = "f006c2ac4710855cf0f916dd6b77acf6b048dc6e"
+  version = "v1.0.3"
+
+[[projects]]
+  name = "github.com/stretchr/testify"
+  packages = ["assert","require","suite"]
+  revision = "69483b4bd14f5845b5a1e55bca19e954e827f1d0"
+  version = "v1.1.4"
+
+[[projects]]
+  name = "go.uber.org/atomic"
+  packages = ["."]
+  revision = "8474b86a5a6f79c443ce4b2992817ff32cf208b8"
+  version = "v1.3.1"
+
+[[projects]]
+  name = "go.uber.org/multierr"
+  packages = ["."]
+  revision = "3c4937480c32f4c13a875a1829af76c98ca3d40a"
+  version = "v1.1.0"
+
+[[projects]]
+  name = "go.uber.org/zap"
+  packages = [".","buffer","internal/bufferpool","internal/color","internal/exit","zapcore"]
+  revision = "35aad584952c3e7020db7b839f6b102de6271f89"
+  version = "v1.7.1"
+
+[[projects]]
+  branch = "master"
+  name = "golang.org/x/crypto"
+  packages = ["ssh/terminal"]
+  revision = "94eea52f7b742c7cbe0b03b22f0c4c8631ece122"
+
+[[projects]]
+  branch = "master"
+  name = "golang.org/x/net"
+  packages = ["context","context/ctxhttp","http2","http2/hpack","idna","internal/timeseries","lex/httplex","trace"]
+  revision = "a8b9294777976932365dabb6640cf1468d95c70f"
+
+[[projects]]
+  branch = "master"
+  name = "golang.org/x/oauth2"
+  packages = [".","google","internal","jws","jwt"]
+  revision = "f95fa95eaa936d9d87489b15d1d18b97c1ba9c28"
+
+[[projects]]
+  branch = "master"
+  name = "golang.org/x/sys"
+  packages = ["unix","windows"]
+  revision = "13fcbd661c8ececa8807a29b48407d674b1d8ed8"
+
+[[projects]]
+  branch = "master"
+  name = "golang.org/x/text"
+  packages = ["collate","collate/build","internal/colltab","internal/gen","internal/tag","internal/triegen","internal/ucd","language","secure/bidirule","transform","unicode/bidi","unicode/cldr","unicode/norm","unicode/rangetable"]
+  revision = "75cc3cad82b5f47d3fb229ddda8c5167da14f294"
+
+[[projects]]
+  name = "google.golang.org/appengine"
+  packages = [".","internal","internal/app_identity","internal/base","internal/datastore","internal/log","internal/modules","internal/remote_api","internal/urlfetch","urlfetch"]
+  revision = "150dc57a1b433e64154302bdc40b6bb8aefa313a"
+  version = "v1.0.0"
+
+[[projects]]
+  branch = "master"
+  name = "google.golang.org/genproto"
+  packages = ["googleapis/rpc/status"]
+  revision = "7f0da29060c682909f650ad8ed4e515bd74fa12a"
+
+[[projects]]
+  name = "google.golang.org/grpc"
+  packages = [".","balancer","balancer/roundrobin","codes","connectivity","credentials","credentials/oauth","encoding","grpclb/grpc_lb_v1/messages","grpclog","internal","keepalive","metadata","naming","peer","resolver","resolver/dns","resolver/passthrough","stats","status","tap","transport"]
+  revision = "5a9f7b402fe85096d2e1d0383435ee1876e863d0"
+  version = "v1.8.0"
+
+[solve-meta]
+  analyzer-name = "dep"
+  analyzer-version = 1
+  inputs-digest = "b24c6670412eb0bc44ed1db77fecc52333f8725f3e3272bdc568f5683a63031f"
+  solver-name = "gps-cdcl"
+  solver-version = 1
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/Gopkg.toml b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/Gopkg.toml
new file mode 100644
index 000000000..0a7d4c1cd
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/Gopkg.toml
@@ -0,0 +1,35 @@
+[[constraint]]
+  name = "github.com/gogo/protobuf"
+  version = "0.5.0"
+
+[[constraint]]
+  branch = "master"
+  name = "github.com/golang/protobuf"
+
+[[constraint]]
+  name = "github.com/opentracing/opentracing-go"
+  version = "1.0.2"
+
+[[constraint]]
+  name = "github.com/sirupsen/logrus"
+  version = "1.0.3"
+
+[[constraint]]
+  name = "github.com/stretchr/testify"
+  version = "1.1.4"
+
+[[constraint]]
+  name = "go.uber.org/zap"
+  version = "1.7.1"
+
+[[constraint]]
+  branch = "master"
+  name = "golang.org/x/net"
+
+[[constraint]]
+  branch = "master"
+  name = "golang.org/x/oauth2"
+
+[[constraint]]
+  name = "google.golang.org/grpc"
+  version = "1.8.0"
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/LICENSE b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/LICENSE
new file mode 100644
index 000000000..b2b065037
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/LICENSE
@@ -0,0 +1,201 @@
+                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
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+      "You" (or "Your") shall mean an individual or Legal Entity
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+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
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+
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+      whether in tort (including negligence), contract, or otherwise,
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+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
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+      file or class name and description of purpose be included on the
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+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
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+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
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+   See the License for the specific language governing permissions and
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\ No newline at end of file
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/README.md b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/README.md
new file mode 100644
index 000000000..224069b22
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/README.md
@@ -0,0 +1,84 @@
+# Go gRPC Middleware
+
+[![Travis Build](https://travis-ci.org/grpc-ecosystem/go-grpc-middleware.svg?branch=master)](https://travis-ci.org/grpc-ecosystem/go-grpc-middleware)
+[![Go Report Card](https://goreportcard.com/badge/github.com/grpc-ecosystem/go-grpc-middleware)](https://goreportcard.com/report/github.com/grpc-ecosystem/go-grpc-middleware)
+[![GoDoc](http://img.shields.io/badge/GoDoc-Reference-blue.svg)](https://godoc.org/github.com/grpc-ecosystem/go-grpc-middleware)
+[![SourceGraph](https://sourcegraph.com/github.com/grpc-ecosystem/go-grpc-middleware/-/badge.svg)](https://sourcegraph.com/github.com/grpc-ecosystem/go-grpc-middleware/?badge)
+[![codecov](https://codecov.io/gh/grpc-ecosystem/go-grpc-middleware/branch/master/graph/badge.svg)](https://codecov.io/gh/grpc-ecosystem/go-grpc-middleware)
+[![Apache 2.0 License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](LICENSE)
+[![quality: production](https://img.shields.io/badge/quality-production-orange.svg)](#status)
+[![Slack](slack.png)](https://join.slack.com/t/improbable-eng/shared_invite/enQtMzQ1ODcyMzQ5MjM4LWY5ZWZmNGM2ODc5MmViNmQ3ZTA3ZTY3NzQwOTBlMTkzZmIxZTIxODk0OWU3YjZhNWVlNDU3MDlkZGViZjhkMjc)
+
+[gRPC Go](https://github.com/grpc/grpc-go) Middleware: interceptors, helpers, utilities.
+
+## Middleware
+
+[gRPC Go](https://github.com/grpc/grpc-go) recently acquired support for
+Interceptors, i.e. [middleware](https://medium.com/@matryer/writing-middleware-in-golang-and-how-go-makes-it-so-much-fun-4375c1246e81#.gv7tdlghs) 
+that is executed either on the gRPC Server before the request is passed onto the user's application logic, or on the gRPC client either around the user call. It is a perfect way to implement
+common patterns: auth, logging, message, validation, retries or monitoring.
+
+These are generic building blocks that make it easy to build multiple microservices easily.
+The purpose of this repository is to act as a go-to point for such reusable functionality. It contains
+some of them itself, but also will link to useful external repos.
+
+`grpc_middleware` itself provides support for chaining interceptors, here's an example:
+
+```go
+import "github.com/grpc-ecosystem/go-grpc-middleware"
+
+myServer := grpc.NewServer(
+    grpc.StreamInterceptor(grpc_middleware.ChainStreamServer(
+        grpc_ctxtags.StreamServerInterceptor(),
+        grpc_opentracing.StreamServerInterceptor(),
+        grpc_prometheus.StreamServerInterceptor,
+        grpc_zap.StreamServerInterceptor(zapLogger),
+        grpc_auth.StreamServerInterceptor(myAuthFunction),
+        grpc_recovery.StreamServerInterceptor(),
+    )),
+    grpc.UnaryInterceptor(grpc_middleware.ChainUnaryServer(
+        grpc_ctxtags.UnaryServerInterceptor(),
+        grpc_opentracing.UnaryServerInterceptor(),
+        grpc_prometheus.UnaryServerInterceptor,
+        grpc_zap.UnaryServerInterceptor(zapLogger),
+        grpc_auth.UnaryServerInterceptor(myAuthFunction),
+        grpc_recovery.UnaryServerInterceptor(),
+    )),
+)
+```
+
+## Interceptors
+
+*Please send a PR to add new interceptors or middleware to this list*
+
+#### Auth
+   * [`grpc_auth`](auth) - a customizable (via `AuthFunc`) piece of auth middleware 
+
+#### Logging
+   * [`grpc_ctxtags`](tags/) - a library that adds a `Tag` map to context, with data populated from request body
+   * [`grpc_zap`](logging/zap/) - integration of [zap](https://github.com/uber-go/zap) logging library into gRPC handlers.
+   * [`grpc_logrus`](logging/logrus/) - integration of [logrus](https://github.com/sirupsen/logrus) logging library into gRPC handlers.
+
+
+#### Monitoring
+   * [`grpc_prometheus`⚡](https://github.com/grpc-ecosystem/go-grpc-prometheus) - Prometheus client-side and server-side monitoring middleware
+   * [`otgrpc`⚡](https://github.com/grpc-ecosystem/grpc-opentracing/tree/master/go/otgrpc) - [OpenTracing](http://opentracing.io/) client-side and server-side interceptors
+   * [`grpc_opentracing`](tracing/opentracing) - [OpenTracing](http://opentracing.io/) client-side and server-side interceptors with support for streaming and handler-returned tags
+
+#### Client
+   * [`grpc_retry`](retry/) - a generic gRPC response code retry mechanism, client-side middleware
+
+#### Server
+   * [`grpc_validator`](validator/) - codegen inbound message validation from `.proto` options
+   * [`grpc_recovery`](recovery/) - turn panics into gRPC errors
+
+
+## Status
+
+This code has been running in *production* since May 2016 as the basis of the gRPC micro services stack at [Improbable](https://improbable.io).
+
+Additional tooling will be added, and contributions are welcome.
+
+## License
+
+`go-grpc-middleware` is released under the Apache 2.0 license. See the [LICENSE](LICENSE) file for details.
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/chain.go b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/chain.go
new file mode 100644
index 000000000..45a2f5f49
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/chain.go
@@ -0,0 +1,183 @@
+// Copyright 2016 Michal Witkowski. All Rights Reserved.
+// See LICENSE for licensing terms.
+
+// gRPC Server Interceptor chaining middleware.
+
+package grpc_middleware
+
+import (
+	"golang.org/x/net/context"
+	"google.golang.org/grpc"
+)
+
+// ChainUnaryServer creates a single interceptor out of a chain of many interceptors.
+//
+// Execution is done in left-to-right order, including passing of context.
+// For example ChainUnaryServer(one, two, three) will execute one before two before three, and three
+// will see context changes of one and two.
+func ChainUnaryServer(interceptors ...grpc.UnaryServerInterceptor) grpc.UnaryServerInterceptor {
+	n := len(interceptors)
+
+	if n > 1 {
+		lastI := n - 1
+		return func(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (interface{}, error) {
+			var (
+				chainHandler grpc.UnaryHandler
+				curI         int
+			)
+
+			chainHandler = func(currentCtx context.Context, currentReq interface{}) (interface{}, error) {
+				if curI == lastI {
+					return handler(currentCtx, currentReq)
+				}
+				curI++
+				resp, err := interceptors[curI](currentCtx, currentReq, info, chainHandler)
+				curI--
+				return resp, err
+			}
+
+			return interceptors[0](ctx, req, info, chainHandler)
+		}
+	}
+
+	if n == 1 {
+		return interceptors[0]
+	}
+
+	// n == 0; Dummy interceptor maintained for backward compatibility to avoid returning nil.
+	return func(ctx context.Context, req interface{}, _ *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (interface{}, error) {
+		return handler(ctx, req)
+	}
+}
+
+// ChainStreamServer creates a single interceptor out of a chain of many interceptors.
+//
+// Execution is done in left-to-right order, including passing of context.
+// For example ChainUnaryServer(one, two, three) will execute one before two before three.
+// If you want to pass context between interceptors, use WrapServerStream.
+func ChainStreamServer(interceptors ...grpc.StreamServerInterceptor) grpc.StreamServerInterceptor {
+	n := len(interceptors)
+
+	if n > 1 {
+		lastI := n - 1
+		return func(srv interface{}, stream grpc.ServerStream, info *grpc.StreamServerInfo, handler grpc.StreamHandler) error {
+			var (
+				chainHandler grpc.StreamHandler
+				curI         int
+			)
+
+			chainHandler = func(currentSrv interface{}, currentStream grpc.ServerStream) error {
+				if curI == lastI {
+					return handler(currentSrv, currentStream)
+				}
+				curI++
+				err := interceptors[curI](currentSrv, currentStream, info, chainHandler)
+				curI--
+				return err
+			}
+
+			return interceptors[0](srv, stream, info, chainHandler)
+		}
+	}
+
+	if n == 1 {
+		return interceptors[0]
+	}
+
+	// n == 0; Dummy interceptor maintained for backward compatibility to avoid returning nil.
+	return func(srv interface{}, stream grpc.ServerStream, _ *grpc.StreamServerInfo, handler grpc.StreamHandler) error {
+		return handler(srv, stream)
+	}
+}
+
+// ChainUnaryClient creates a single interceptor out of a chain of many interceptors.
+//
+// Execution is done in left-to-right order, including passing of context.
+// For example ChainUnaryClient(one, two, three) will execute one before two before three.
+func ChainUnaryClient(interceptors ...grpc.UnaryClientInterceptor) grpc.UnaryClientInterceptor {
+	n := len(interceptors)
+
+	if n > 1 {
+		lastI := n - 1
+		return func(ctx context.Context, method string, req, reply interface{}, cc *grpc.ClientConn, invoker grpc.UnaryInvoker, opts ...grpc.CallOption) error {
+			var (
+				chainHandler grpc.UnaryInvoker
+				curI         int
+			)
+
+			chainHandler = func(currentCtx context.Context, currentMethod string, currentReq, currentRepl interface{}, currentConn *grpc.ClientConn, currentOpts ...grpc.CallOption) error {
+				if curI == lastI {
+					return invoker(currentCtx, currentMethod, currentReq, currentRepl, currentConn, currentOpts...)
+				}
+				curI++
+				err := interceptors[curI](currentCtx, currentMethod, currentReq, currentRepl, currentConn, chainHandler, currentOpts...)
+				curI--
+				return err
+			}
+
+			return interceptors[0](ctx, method, req, reply, cc, chainHandler, opts...)
+		}
+	}
+
+	if n == 1 {
+		return interceptors[0]
+	}
+
+	// n == 0; Dummy interceptor maintained for backward compatibility to avoid returning nil.
+	return func(ctx context.Context, method string, req, reply interface{}, cc *grpc.ClientConn, invoker grpc.UnaryInvoker, opts ...grpc.CallOption) error {
+		return invoker(ctx, method, req, reply, cc, opts...)
+	}
+}
+
+// ChainStreamClient creates a single interceptor out of a chain of many interceptors.
+//
+// Execution is done in left-to-right order, including passing of context.
+// For example ChainStreamClient(one, two, three) will execute one before two before three.
+func ChainStreamClient(interceptors ...grpc.StreamClientInterceptor) grpc.StreamClientInterceptor {
+	n := len(interceptors)
+
+	if n > 1 {
+		lastI := n - 1
+		return func(ctx context.Context, desc *grpc.StreamDesc, cc *grpc.ClientConn, method string, streamer grpc.Streamer, opts ...grpc.CallOption) (grpc.ClientStream, error) {
+			var (
+				chainHandler grpc.Streamer
+				curI         int
+			)
+
+			chainHandler = func(currentCtx context.Context, currentDesc *grpc.StreamDesc, currentConn *grpc.ClientConn, currentMethod string, currentOpts ...grpc.CallOption) (grpc.ClientStream, error) {
+				if curI == lastI {
+					return streamer(currentCtx, currentDesc, currentConn, currentMethod, currentOpts...)
+				}
+				curI++
+				stream, err := interceptors[curI](currentCtx, currentDesc, currentConn, currentMethod, chainHandler, currentOpts...)
+				curI--
+				return stream, err
+			}
+
+			return interceptors[0](ctx, desc, cc, method, chainHandler, opts...)
+		}
+	}
+
+	if n == 1 {
+		return interceptors[0]
+	}
+
+	// n == 0; Dummy interceptor maintained for backward compatibility to avoid returning nil.
+	return func(ctx context.Context, desc *grpc.StreamDesc, cc *grpc.ClientConn, method string, streamer grpc.Streamer, opts ...grpc.CallOption) (grpc.ClientStream, error) {
+		return streamer(ctx, desc, cc, method, opts...)
+	}
+}
+
+// Chain creates a single interceptor out of a chain of many interceptors.
+//
+// WithUnaryServerChain is a grpc.Server config option that accepts multiple unary interceptors.
+// Basically syntactic sugar.
+func WithUnaryServerChain(interceptors ...grpc.UnaryServerInterceptor) grpc.ServerOption {
+	return grpc.UnaryInterceptor(ChainUnaryServer(interceptors...))
+}
+
+// WithStreamServerChain is a grpc.Server config option that accepts multiple stream interceptors.
+// Basically syntactic sugar.
+func WithStreamServerChain(interceptors ...grpc.StreamServerInterceptor) grpc.ServerOption {
+	return grpc.StreamInterceptor(ChainStreamServer(interceptors...))
+}
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/doc.go b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/doc.go
new file mode 100644
index 000000000..716895036
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/doc.go
@@ -0,0 +1,69 @@
+// Copyright 2016 Michal Witkowski. All Rights Reserved.
+// See LICENSE for licensing terms.
+
+/*
+`grpc_middleware` is a collection of gRPC middleware packages: interceptors, helpers and tools.
+
+Middleware
+
+gRPC is a fantastic RPC middleware, which sees a lot of adoption in the Golang world. However, the
+upstream gRPC codebase is relatively bare bones.
+
+This package, and most of its child packages provides commonly needed middleware for gRPC:
+client-side interceptors for retires, server-side interceptors for input validation and auth,
+functions for chaining said interceptors, metadata convenience methods and more.
+
+Chaining
+
+By default, gRPC doesn't allow one to have more than one interceptor either on the client nor on
+the server side. `grpc_middleware` provides convenient chaining methods
+
+Simple way of turning a multiple interceptors into a single interceptor. Here's an example for
+server chaining:
+
+	myServer := grpc.NewServer(
+	    grpc.StreamInterceptor(grpc_middleware.ChainStreamServer(loggingStream, monitoringStream, authStream)),
+	    grpc.UnaryInterceptor(grpc_middleware.ChainUnaryServer(loggingUnary, monitoringUnary, authUnary),
+	)
+
+These interceptors will be executed from left to right: logging, monitoring and auth.
+
+Here's an example for client side chaining:
+
+	clientConn, err = grpc.Dial(
+	    address,
+	        grpc.WithUnaryInterceptor(grpc_middleware.ChainUnaryClient(monitoringClientUnary, retryUnary)),
+	        grpc.WithStreamInterceptor(grpc_middleware.ChainStreamClient(monitoringClientStream, retryStream)),
+	)
+	client = pb_testproto.NewTestServiceClient(clientConn)
+	resp, err := client.PingEmpty(s.ctx, &myservice.Request{Msg: "hello"})
+
+These interceptors will be executed from left to right: monitoring and then retry logic.
+
+The retry interceptor will call every interceptor that follows it whenever when a retry happens.
+
+Writing Your Own
+
+Implementing your own interceptor is pretty trivial: there are interfaces for that. But the interesting
+bit exposing common data to handlers (and other middleware), similarly to HTTP Middleware design.
+For example, you may want to pass the identity of the caller from the auth interceptor all the way
+to the handling function.
+
+For example, a client side interceptor example for auth looks like:
+
+	func FakeAuthUnaryInterceptor(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (interface{}, error) {
+	   newCtx := context.WithValue(ctx, "user_id", "john@example.com")
+	   return handler(newCtx, req)
+	}
+
+Unfortunately, it's not as easy for streaming RPCs. These have the `context.Context` embedded within
+the `grpc.ServerStream` object. To pass values through context, a wrapper (`WrappedServerStream`) is
+needed. For example:
+
+	func FakeAuthStreamingInterceptor(srv interface{}, stream grpc.ServerStream, info *grpc.StreamServerInfo, handler grpc.StreamHandler) error {
+	   newStream := grpc_middleware.WrapServerStream(stream)
+	   newStream.WrappedContext = context.WithValue(ctx, "user_id", "john@example.com")
+	   return handler(srv, stream)
+	}
+*/
+package grpc_middleware
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/makefile b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/makefile
new file mode 100644
index 000000000..51dc5b8f2
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/makefile
@@ -0,0 +1,16 @@
+SHELL=/bin/bash
+
+GOFILES_NOVENDOR = $(shell go list ./... | grep -v /vendor/)
+
+all: vet fmt test
+
+fmt:
+	go fmt $(GOFILES_NOVENDOR)
+
+vet:
+	go vet $(GOFILES_NOVENDOR)
+
+test: vet
+	./scripts/test_all.sh
+
+.PHONY: all test
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/slack.png b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/slack.png
new file mode 100644
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z3JP|)qN<jWRd&r<cK=i{TWayAz2RQyNYI2(vGNa^i5}FV%Ngj(DtWxbD{4MI&If|1
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literal 0
HcmV?d00001

diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/wrappers.go b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/wrappers.go
new file mode 100644
index 000000000..597b86244
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/wrappers.go
@@ -0,0 +1,29 @@
+// Copyright 2016 Michal Witkowski. All Rights Reserved.
+// See LICENSE for licensing terms.
+
+package grpc_middleware
+
+import (
+	"golang.org/x/net/context"
+	"google.golang.org/grpc"
+)
+
+// WrappedServerStream is a thin wrapper around grpc.ServerStream that allows modifying context.
+type WrappedServerStream struct {
+	grpc.ServerStream
+	// WrappedContext is the wrapper's own Context. You can assign it.
+	WrappedContext context.Context
+}
+
+// Context returns the wrapper's WrappedContext, overwriting the nested grpc.ServerStream.Context()
+func (w *WrappedServerStream) Context() context.Context {
+	return w.WrappedContext
+}
+
+// WrapServerStream returns a ServerStream that has the ability to overwrite context.
+func WrapServerStream(stream grpc.ServerStream) *WrappedServerStream {
+	if existing, ok := stream.(*WrappedServerStream); ok {
+		return existing
+	}
+	return &WrappedServerStream{ServerStream: stream, WrappedContext: stream.Context()}
+}
diff --git a/vendor/github.com/grpc-ecosystem/grpc-gateway/LICENSE.txt b/vendor/github.com/grpc-ecosystem/grpc-gateway/LICENSE.txt
new file mode 100644
index 000000000..364516251
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/grpc-gateway/LICENSE.txt
@@ -0,0 +1,27 @@
+Copyright (c) 2015, Gengo, Inc.
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright notice,
+      this list of conditions and the following disclaimer.
+
+    * Redistributions in binary form must reproduce the above copyright notice,
+      this list of conditions and the following disclaimer in the documentation
+      and/or other materials provided with the distribution.
+
+    * Neither the name of Gengo, Inc. nor the names of its
+      contributors may be used to endorse or promote products derived from this
+      software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/vendor/github.com/grpc-ecosystem/grpc-gateway/internal/BUILD.bazel b/vendor/github.com/grpc-ecosystem/grpc-gateway/internal/BUILD.bazel
new file mode 100644
index 000000000..5242751fb
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/grpc-gateway/internal/BUILD.bazel
@@ -0,0 +1,23 @@
+load("@rules_proto//proto:defs.bzl", "proto_library")
+load("@io_bazel_rules_go//go:def.bzl", "go_library")
+load("@io_bazel_rules_go//proto:def.bzl", "go_proto_library")
+
+package(default_visibility = ["//visibility:public"])
+
+proto_library(
+    name = "internal_proto",
+    srcs = ["errors.proto"],
+    deps = ["@com_google_protobuf//:any_proto"],
+)
+
+go_proto_library(
+    name = "internal_go_proto",
+    importpath = "github.com/grpc-ecosystem/grpc-gateway/internal",
+    proto = ":internal_proto",
+)
+
+go_library(
+    name = "go_default_library",
+    embed = [":internal_go_proto"],
+    importpath = "github.com/grpc-ecosystem/grpc-gateway/internal",
+)
diff --git a/vendor/github.com/grpc-ecosystem/grpc-gateway/internal/errors.pb.go b/vendor/github.com/grpc-ecosystem/grpc-gateway/internal/errors.pb.go
new file mode 100644
index 000000000..61101d717
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/grpc-gateway/internal/errors.pb.go
@@ -0,0 +1,189 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: internal/errors.proto
+
+package internal
+
+import (
+	fmt "fmt"
+	proto "github.com/golang/protobuf/proto"
+	any "github.com/golang/protobuf/ptypes/any"
+	math "math"
+)
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion3 // please upgrade the proto package
+
+// Error is the generic error returned from unary RPCs.
+type Error struct {
+	Error string `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
+	// This is to make the error more compatible with users that expect errors to be Status objects:
+	// https://github.com/grpc/grpc/blob/master/src/proto/grpc/status/status.proto
+	// It should be the exact same message as the Error field.
+	Code                 int32      `protobuf:"varint,2,opt,name=code,proto3" json:"code,omitempty"`
+	Message              string     `protobuf:"bytes,3,opt,name=message,proto3" json:"message,omitempty"`
+	Details              []*any.Any `protobuf:"bytes,4,rep,name=details,proto3" json:"details,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}   `json:"-"`
+	XXX_unrecognized     []byte     `json:"-"`
+	XXX_sizecache        int32      `json:"-"`
+}
+
+func (m *Error) Reset()         { *m = Error{} }
+func (m *Error) String() string { return proto.CompactTextString(m) }
+func (*Error) ProtoMessage()    {}
+func (*Error) Descriptor() ([]byte, []int) {
+	return fileDescriptor_9b093362ca6d1e03, []int{0}
+}
+
+func (m *Error) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Error.Unmarshal(m, b)
+}
+func (m *Error) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Error.Marshal(b, m, deterministic)
+}
+func (m *Error) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Error.Merge(m, src)
+}
+func (m *Error) XXX_Size() int {
+	return xxx_messageInfo_Error.Size(m)
+}
+func (m *Error) XXX_DiscardUnknown() {
+	xxx_messageInfo_Error.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Error proto.InternalMessageInfo
+
+func (m *Error) GetError() string {
+	if m != nil {
+		return m.Error
+	}
+	return ""
+}
+
+func (m *Error) GetCode() int32 {
+	if m != nil {
+		return m.Code
+	}
+	return 0
+}
+
+func (m *Error) GetMessage() string {
+	if m != nil {
+		return m.Message
+	}
+	return ""
+}
+
+func (m *Error) GetDetails() []*any.Any {
+	if m != nil {
+		return m.Details
+	}
+	return nil
+}
+
+// StreamError is a response type which is returned when
+// streaming rpc returns an error.
+type StreamError struct {
+	GrpcCode             int32      `protobuf:"varint,1,opt,name=grpc_code,json=grpcCode,proto3" json:"grpc_code,omitempty"`
+	HttpCode             int32      `protobuf:"varint,2,opt,name=http_code,json=httpCode,proto3" json:"http_code,omitempty"`
+	Message              string     `protobuf:"bytes,3,opt,name=message,proto3" json:"message,omitempty"`
+	HttpStatus           string     `protobuf:"bytes,4,opt,name=http_status,json=httpStatus,proto3" json:"http_status,omitempty"`
+	Details              []*any.Any `protobuf:"bytes,5,rep,name=details,proto3" json:"details,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}   `json:"-"`
+	XXX_unrecognized     []byte     `json:"-"`
+	XXX_sizecache        int32      `json:"-"`
+}
+
+func (m *StreamError) Reset()         { *m = StreamError{} }
+func (m *StreamError) String() string { return proto.CompactTextString(m) }
+func (*StreamError) ProtoMessage()    {}
+func (*StreamError) Descriptor() ([]byte, []int) {
+	return fileDescriptor_9b093362ca6d1e03, []int{1}
+}
+
+func (m *StreamError) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_StreamError.Unmarshal(m, b)
+}
+func (m *StreamError) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_StreamError.Marshal(b, m, deterministic)
+}
+func (m *StreamError) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_StreamError.Merge(m, src)
+}
+func (m *StreamError) XXX_Size() int {
+	return xxx_messageInfo_StreamError.Size(m)
+}
+func (m *StreamError) XXX_DiscardUnknown() {
+	xxx_messageInfo_StreamError.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_StreamError proto.InternalMessageInfo
+
+func (m *StreamError) GetGrpcCode() int32 {
+	if m != nil {
+		return m.GrpcCode
+	}
+	return 0
+}
+
+func (m *StreamError) GetHttpCode() int32 {
+	if m != nil {
+		return m.HttpCode
+	}
+	return 0
+}
+
+func (m *StreamError) GetMessage() string {
+	if m != nil {
+		return m.Message
+	}
+	return ""
+}
+
+func (m *StreamError) GetHttpStatus() string {
+	if m != nil {
+		return m.HttpStatus
+	}
+	return ""
+}
+
+func (m *StreamError) GetDetails() []*any.Any {
+	if m != nil {
+		return m.Details
+	}
+	return nil
+}
+
+func init() {
+	proto.RegisterType((*Error)(nil), "grpc.gateway.runtime.Error")
+	proto.RegisterType((*StreamError)(nil), "grpc.gateway.runtime.StreamError")
+}
+
+func init() { proto.RegisterFile("internal/errors.proto", fileDescriptor_9b093362ca6d1e03) }
+
+var fileDescriptor_9b093362ca6d1e03 = []byte{
+	// 252 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x8c, 0x90, 0xc1, 0x4a, 0xc4, 0x30,
+	0x10, 0x86, 0x89, 0xbb, 0x75, 0xdb, 0xe9, 0x2d, 0x54, 0x88, 0xee, 0xc1, 0xb2, 0xa7, 0x9e, 0x52,
+	0xd0, 0x27, 0xd0, 0xc5, 0x17, 0xe8, 0xde, 0xbc, 0x2c, 0xd9, 0xdd, 0x31, 0x16, 0xda, 0xa4, 0x24,
+	0x53, 0xa4, 0xf8, 0x56, 0x3e, 0xa1, 0x24, 0xa5, 0xb0, 0x27, 0xf1, 0xd6, 0xf9, 0xfb, 0xcf, 0x7c,
+	0x1f, 0x81, 0xbb, 0xd6, 0x10, 0x3a, 0xa3, 0xba, 0x1a, 0x9d, 0xb3, 0xce, 0xcb, 0xc1, 0x59, 0xb2,
+	0xbc, 0xd0, 0x6e, 0x38, 0x4b, 0xad, 0x08, 0xbf, 0xd4, 0x24, 0xdd, 0x68, 0xa8, 0xed, 0xf1, 0xe1,
+	0x5e, 0x5b, 0xab, 0x3b, 0xac, 0x63, 0xe7, 0x34, 0x7e, 0xd4, 0xca, 0x4c, 0xf3, 0xc2, 0xee, 0x1b,
+	0x92, 0xb7, 0x70, 0x80, 0x17, 0x90, 0xc4, 0x4b, 0x82, 0x95, 0xac, 0xca, 0x9a, 0x79, 0xe0, 0x1c,
+	0xd6, 0x67, 0x7b, 0x41, 0x71, 0x53, 0xb2, 0x2a, 0x69, 0xe2, 0x37, 0x17, 0xb0, 0xe9, 0xd1, 0x7b,
+	0xa5, 0x51, 0xac, 0x62, 0x77, 0x19, 0xb9, 0x84, 0xcd, 0x05, 0x49, 0xb5, 0x9d, 0x17, 0xeb, 0x72,
+	0x55, 0xe5, 0x4f, 0x85, 0x9c, 0xc9, 0x72, 0x21, 0xcb, 0x17, 0x33, 0x35, 0x4b, 0x69, 0xf7, 0xc3,
+	0x20, 0x3f, 0x90, 0x43, 0xd5, 0xcf, 0x0e, 0x5b, 0xc8, 0x82, 0xff, 0x31, 0x22, 0x59, 0x44, 0xa6,
+	0x21, 0xd8, 0x07, 0xec, 0x16, 0xb2, 0x4f, 0xa2, 0xe1, 0x78, 0xe5, 0x93, 0x86, 0x60, 0xff, 0xb7,
+	0xd3, 0x23, 0xe4, 0x71, 0xcd, 0x93, 0xa2, 0x31, 0x78, 0x85, 0xbf, 0x10, 0xa2, 0x43, 0x4c, 0xae,
+	0xa5, 0x93, 0x7f, 0x48, 0xbf, 0xc2, 0x7b, 0xba, 0xbc, 0xfd, 0xe9, 0x36, 0x56, 0x9e, 0x7f, 0x03,
+	0x00, 0x00, 0xff, 0xff, 0xde, 0x72, 0x6b, 0x83, 0x8e, 0x01, 0x00, 0x00,
+}
diff --git a/vendor/github.com/grpc-ecosystem/grpc-gateway/internal/errors.proto b/vendor/github.com/grpc-ecosystem/grpc-gateway/internal/errors.proto
new file mode 100644
index 000000000..4fb212c6b
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/grpc-gateway/internal/errors.proto
@@ -0,0 +1,26 @@
+syntax = "proto3";
+package grpc.gateway.runtime;
+option go_package = "internal";
+
+import "google/protobuf/any.proto";
+
+// Error is the generic error returned from unary RPCs.
+message Error {
+	string error = 1;
+	// This is to make the error more compatible with users that expect errors to be Status objects:
+	// https://github.com/grpc/grpc/blob/master/src/proto/grpc/status/status.proto
+	// It should be the exact same message as the Error field.
+	int32 code = 2;
+	string message = 3;
+	repeated google.protobuf.Any details = 4;
+}
+
+// StreamError is a response type which is returned when
+// streaming rpc returns an error.
+message StreamError {
+	int32 grpc_code = 1;
+	int32 http_code = 2;
+	string message = 3;
+	string http_status = 4;
+	repeated google.protobuf.Any details = 5;
+}
diff --git a/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/BUILD.bazel b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/BUILD.bazel
new file mode 100644
index 000000000..58b72b9cf
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/BUILD.bazel
@@ -0,0 +1,85 @@
+load("@io_bazel_rules_go//go:def.bzl", "go_library", "go_test")
+
+package(default_visibility = ["//visibility:public"])
+
+go_library(
+    name = "go_default_library",
+    srcs = [
+        "context.go",
+        "convert.go",
+        "doc.go",
+        "errors.go",
+        "fieldmask.go",
+        "handler.go",
+        "marshal_httpbodyproto.go",
+        "marshal_json.go",
+        "marshal_jsonpb.go",
+        "marshal_proto.go",
+        "marshaler.go",
+        "marshaler_registry.go",
+        "mux.go",
+        "pattern.go",
+        "proto2_convert.go",
+        "proto_errors.go",
+        "query.go",
+    ],
+    importpath = "github.com/grpc-ecosystem/grpc-gateway/runtime",
+    deps = [
+        "//internal:go_default_library",
+        "//utilities:go_default_library",
+        "@com_github_golang_protobuf//descriptor:go_default_library_gen",
+        "@com_github_golang_protobuf//jsonpb:go_default_library_gen",
+        "@com_github_golang_protobuf//proto:go_default_library",
+        "@go_googleapis//google/api:httpbody_go_proto",
+        "@io_bazel_rules_go//proto/wkt:any_go_proto",
+        "@io_bazel_rules_go//proto/wkt:descriptor_go_proto",
+        "@io_bazel_rules_go//proto/wkt:duration_go_proto",
+        "@io_bazel_rules_go//proto/wkt:field_mask_go_proto",
+        "@io_bazel_rules_go//proto/wkt:timestamp_go_proto",
+        "@io_bazel_rules_go//proto/wkt:wrappers_go_proto",
+        "@org_golang_google_grpc//codes:go_default_library",
+        "@org_golang_google_grpc//grpclog:go_default_library",
+        "@org_golang_google_grpc//metadata:go_default_library",
+        "@org_golang_google_grpc//status:go_default_library",
+    ],
+)
+
+go_test(
+    name = "go_default_test",
+    size = "small",
+    srcs = [
+        "context_test.go",
+        "convert_test.go",
+        "errors_test.go",
+        "fieldmask_test.go",
+        "handler_test.go",
+        "marshal_httpbodyproto_test.go",
+        "marshal_json_test.go",
+        "marshal_jsonpb_test.go",
+        "marshal_proto_test.go",
+        "marshaler_registry_test.go",
+        "mux_test.go",
+        "pattern_test.go",
+        "query_test.go",
+    ],
+    embed = [":go_default_library"],
+    deps = [
+        "//internal:go_default_library",
+        "//runtime/internal/examplepb:go_default_library",
+        "//utilities:go_default_library",
+        "@com_github_golang_protobuf//jsonpb:go_default_library_gen",
+        "@com_github_golang_protobuf//proto:go_default_library",
+        "@com_github_golang_protobuf//ptypes:go_default_library_gen",
+        "@go_googleapis//google/api:httpbody_go_proto",
+        "@go_googleapis//google/rpc:errdetails_go_proto",
+        "@io_bazel_rules_go//proto/wkt:duration_go_proto",
+        "@io_bazel_rules_go//proto/wkt:empty_go_proto",
+        "@io_bazel_rules_go//proto/wkt:field_mask_go_proto",
+        "@io_bazel_rules_go//proto/wkt:struct_go_proto",
+        "@io_bazel_rules_go//proto/wkt:timestamp_go_proto",
+        "@io_bazel_rules_go//proto/wkt:wrappers_go_proto",
+        "@org_golang_google_grpc//codes:go_default_library",
+        "@org_golang_google_grpc//metadata:go_default_library",
+        "@org_golang_google_grpc//status:go_default_library",
+    ],
+)
diff --git a/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/context.go b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/context.go
new file mode 100644
index 000000000..d8cbd4cc9
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/context.go
@@ -0,0 +1,291 @@
+package runtime
+
+import (
+	"context"
+	"encoding/base64"
+	"fmt"
+	"net"
+	"net/http"
+	"net/textproto"
+	"strconv"
+	"strings"
+	"sync"
+	"time"
+
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/metadata"
+	"google.golang.org/grpc/status"
+)
+
+// MetadataHeaderPrefix is the http prefix that represents custom metadata
+// parameters to or from a gRPC call.
+const MetadataHeaderPrefix = "Grpc-Metadata-"
+
+// MetadataPrefix is prepended to permanent HTTP header keys (as specified
+// by the IANA) when added to the gRPC context.
+const MetadataPrefix = "grpcgateway-"
+
+// MetadataTrailerPrefix is prepended to gRPC metadata as it is converted to
+// HTTP headers in a response handled by grpc-gateway
+const MetadataTrailerPrefix = "Grpc-Trailer-"
+
+const metadataGrpcTimeout = "Grpc-Timeout"
+const metadataHeaderBinarySuffix = "-Bin"
+
+const xForwardedFor = "X-Forwarded-For"
+const xForwardedHost = "X-Forwarded-Host"
+
+var (
+	// DefaultContextTimeout is used for gRPC call context.WithTimeout whenever a Grpc-Timeout inbound
+	// header isn't present. If the value is 0 the sent `context` will not have a timeout.
+	DefaultContextTimeout = 0 * time.Second
+)
+
+func decodeBinHeader(v string) ([]byte, error) {
+	if len(v)%4 == 0 {
+		// Input was padded, or padding was not necessary.
+		return base64.StdEncoding.DecodeString(v)
+	}
+	return base64.RawStdEncoding.DecodeString(v)
+}
+
+/*
+AnnotateContext adds context information such as metadata from the request.
+
+At a minimum, the RemoteAddr is included in the fashion of "X-Forwarded-For",
+except that the forwarded destination is not another HTTP service but rather
+a gRPC service.
+*/
+func AnnotateContext(ctx context.Context, mux *ServeMux, req *http.Request) (context.Context, error) {
+	ctx, md, err := annotateContext(ctx, mux, req)
+	if err != nil {
+		return nil, err
+	}
+	if md == nil {
+		return ctx, nil
+	}
+
+	return metadata.NewOutgoingContext(ctx, md), nil
+}
+
+// AnnotateIncomingContext adds context information such as metadata from the request.
+// Attach metadata as incoming context.
+func AnnotateIncomingContext(ctx context.Context, mux *ServeMux, req *http.Request) (context.Context, error) {
+	ctx, md, err := annotateContext(ctx, mux, req)
+	if err != nil {
+		return nil, err
+	}
+	if md == nil {
+		return ctx, nil
+	}
+
+	return metadata.NewIncomingContext(ctx, md), nil
+}
+
+func annotateContext(ctx context.Context, mux *ServeMux, req *http.Request) (context.Context, metadata.MD, error) {
+	var pairs []string
+	timeout := DefaultContextTimeout
+	if tm := req.Header.Get(metadataGrpcTimeout); tm != "" {
+		var err error
+		timeout, err = timeoutDecode(tm)
+		if err != nil {
+			return nil, nil, status.Errorf(codes.InvalidArgument, "invalid grpc-timeout: %s", tm)
+		}
+	}
+
+	for key, vals := range req.Header {
+		key = textproto.CanonicalMIMEHeaderKey(key)
+		for _, val := range vals {
+			// For backwards-compatibility, pass through 'authorization' header with no prefix.
+			if key == "Authorization" {
+				pairs = append(pairs, "authorization", val)
+			}
+			if h, ok := mux.incomingHeaderMatcher(key); ok {
+				// Handles "-bin" metadata in grpc, since grpc will do another base64
+				// encode before sending to server, we need to decode it first.
+				if strings.HasSuffix(key, metadataHeaderBinarySuffix) {
+					b, err := decodeBinHeader(val)
+					if err != nil {
+						return nil, nil, status.Errorf(codes.InvalidArgument, "invalid binary header %s: %s", key, err)
+					}
+
+					val = string(b)
+				}
+				pairs = append(pairs, h, val)
+			}
+		}
+	}
+	if host := req.Header.Get(xForwardedHost); host != "" {
+		pairs = append(pairs, strings.ToLower(xForwardedHost), host)
+	} else if req.Host != "" {
+		pairs = append(pairs, strings.ToLower(xForwardedHost), req.Host)
+	}
+
+	if addr := req.RemoteAddr; addr != "" {
+		if remoteIP, _, err := net.SplitHostPort(addr); err == nil {
+			if fwd := req.Header.Get(xForwardedFor); fwd == "" {
+				pairs = append(pairs, strings.ToLower(xForwardedFor), remoteIP)
+			} else {
+				pairs = append(pairs, strings.ToLower(xForwardedFor), fmt.Sprintf("%s, %s", fwd, remoteIP))
+			}
+		}
+	}
+
+	if timeout != 0 {
+		ctx, _ = context.WithTimeout(ctx, timeout)
+	}
+	if len(pairs) == 0 {
+		return ctx, nil, nil
+	}
+	md := metadata.Pairs(pairs...)
+	for _, mda := range mux.metadataAnnotators {
+		md = metadata.Join(md, mda(ctx, req))
+	}
+	return ctx, md, nil
+}
+
+// ServerMetadata consists of metadata sent from gRPC server.
+type ServerMetadata struct {
+	HeaderMD  metadata.MD
+	TrailerMD metadata.MD
+}
+
+type serverMetadataKey struct{}
+
+// NewServerMetadataContext creates a new context with ServerMetadata
+func NewServerMetadataContext(ctx context.Context, md ServerMetadata) context.Context {
+	return context.WithValue(ctx, serverMetadataKey{}, md)
+}
+
+// ServerMetadataFromContext returns the ServerMetadata in ctx
+func ServerMetadataFromContext(ctx context.Context) (md ServerMetadata, ok bool) {
+	md, ok = ctx.Value(serverMetadataKey{}).(ServerMetadata)
+	return
+}
+
+// ServerTransportStream implements grpc.ServerTransportStream.
+// It should only be used by the generated files to support grpc.SendHeader
+// outside of gRPC server use.
+type ServerTransportStream struct {
+	mu      sync.Mutex
+	header  metadata.MD
+	trailer metadata.MD
+}
+
+// Method returns the method for the stream.
+func (s *ServerTransportStream) Method() string {
+	return ""
+}
+
+// Header returns the header metadata of the stream.
+func (s *ServerTransportStream) Header() metadata.MD {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	return s.header.Copy()
+}
+
+// SetHeader sets the header metadata.
+func (s *ServerTransportStream) SetHeader(md metadata.MD) error {
+	if md.Len() == 0 {
+		return nil
+	}
+
+	s.mu.Lock()
+	s.header = metadata.Join(s.header, md)
+	s.mu.Unlock()
+	return nil
+}
+
+// SendHeader sets the header metadata.
+func (s *ServerTransportStream) SendHeader(md metadata.MD) error {
+	return s.SetHeader(md)
+}
+
+// Trailer returns the cached trailer metadata.
+func (s *ServerTransportStream) Trailer() metadata.MD {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	return s.trailer.Copy()
+}
+
+// SetTrailer sets the trailer metadata.
+func (s *ServerTransportStream) SetTrailer(md metadata.MD) error {
+	if md.Len() == 0 {
+		return nil
+	}
+
+	s.mu.Lock()
+	s.trailer = metadata.Join(s.trailer, md)
+	s.mu.Unlock()
+	return nil
+}
+
+func timeoutDecode(s string) (time.Duration, error) {
+	size := len(s)
+	if size < 2 {
+		return 0, fmt.Errorf("timeout string is too short: %q", s)
+	}
+	d, ok := timeoutUnitToDuration(s[size-1])
+	if !ok {
+		return 0, fmt.Errorf("timeout unit is not recognized: %q", s)
+	}
+	t, err := strconv.ParseInt(s[:size-1], 10, 64)
+	if err != nil {
+		return 0, err
+	}
+	return d * time.Duration(t), nil
+}
+
+func timeoutUnitToDuration(u uint8) (d time.Duration, ok bool) {
+	switch u {
+	case 'H':
+		return time.Hour, true
+	case 'M':
+		return time.Minute, true
+	case 'S':
+		return time.Second, true
+	case 'm':
+		return time.Millisecond, true
+	case 'u':
+		return time.Microsecond, true
+	case 'n':
+		return time.Nanosecond, true
+	default:
+	}
+	return
+}
+
+// isPermanentHTTPHeader checks whether hdr belongs to the list of
+// permanent request headers maintained by IANA.
+// http://www.iana.org/assignments/message-headers/message-headers.xml
+func isPermanentHTTPHeader(hdr string) bool {
+	switch hdr {
+	case
+		"Accept",
+		"Accept-Charset",
+		"Accept-Language",
+		"Accept-Ranges",
+		"Authorization",
+		"Cache-Control",
+		"Content-Type",
+		"Cookie",
+		"Date",
+		"Expect",
+		"From",
+		"Host",
+		"If-Match",
+		"If-Modified-Since",
+		"If-None-Match",
+		"If-Schedule-Tag-Match",
+		"If-Unmodified-Since",
+		"Max-Forwards",
+		"Origin",
+		"Pragma",
+		"Referer",
+		"User-Agent",
+		"Via",
+		"Warning":
+		return true
+	}
+	return false
+}
diff --git a/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/convert.go b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/convert.go
new file mode 100644
index 000000000..2c279344d
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/convert.go
@@ -0,0 +1,318 @@
+package runtime
+
+import (
+	"encoding/base64"
+	"fmt"
+	"strconv"
+	"strings"
+
+	"github.com/golang/protobuf/jsonpb"
+	"github.com/golang/protobuf/ptypes/duration"
+	"github.com/golang/protobuf/ptypes/timestamp"
+	"github.com/golang/protobuf/ptypes/wrappers"
+)
+
+// String just returns the given string.
+// It is just for compatibility to other types.
+func String(val string) (string, error) {
+	return val, nil
+}
+
+// StringSlice converts 'val' where individual strings are separated by
+// 'sep' into a string slice.
+func StringSlice(val, sep string) ([]string, error) {
+	return strings.Split(val, sep), nil
+}
+
+// Bool converts the given string representation of a boolean value into bool.
+func Bool(val string) (bool, error) {
+	return strconv.ParseBool(val)
+}
+
+// BoolSlice converts 'val' where individual booleans are separated by
+// 'sep' into a bool slice.
+func BoolSlice(val, sep string) ([]bool, error) {
+	s := strings.Split(val, sep)
+	values := make([]bool, len(s))
+	for i, v := range s {
+		value, err := Bool(v)
+		if err != nil {
+			return values, err
+		}
+		values[i] = value
+	}
+	return values, nil
+}
+
+// Float64 converts the given string representation into representation of a floating point number into float64.
+func Float64(val string) (float64, error) {
+	return strconv.ParseFloat(val, 64)
+}
+
+// Float64Slice converts 'val' where individual floating point numbers are separated by
+// 'sep' into a float64 slice.
+func Float64Slice(val, sep string) ([]float64, error) {
+	s := strings.Split(val, sep)
+	values := make([]float64, len(s))
+	for i, v := range s {
+		value, err := Float64(v)
+		if err != nil {
+			return values, err
+		}
+		values[i] = value
+	}
+	return values, nil
+}
+
+// Float32 converts the given string representation of a floating point number into float32.
+func Float32(val string) (float32, error) {
+	f, err := strconv.ParseFloat(val, 32)
+	if err != nil {
+		return 0, err
+	}
+	return float32(f), nil
+}
+
+// Float32Slice converts 'val' where individual floating point numbers are separated by
+// 'sep' into a float32 slice.
+func Float32Slice(val, sep string) ([]float32, error) {
+	s := strings.Split(val, sep)
+	values := make([]float32, len(s))
+	for i, v := range s {
+		value, err := Float32(v)
+		if err != nil {
+			return values, err
+		}
+		values[i] = value
+	}
+	return values, nil
+}
+
+// Int64 converts the given string representation of an integer into int64.
+func Int64(val string) (int64, error) {
+	return strconv.ParseInt(val, 0, 64)
+}
+
+// Int64Slice converts 'val' where individual integers are separated by
+// 'sep' into a int64 slice.
+func Int64Slice(val, sep string) ([]int64, error) {
+	s := strings.Split(val, sep)
+	values := make([]int64, len(s))
+	for i, v := range s {
+		value, err := Int64(v)
+		if err != nil {
+			return values, err
+		}
+		values[i] = value
+	}
+	return values, nil
+}
+
+// Int32 converts the given string representation of an integer into int32.
+func Int32(val string) (int32, error) {
+	i, err := strconv.ParseInt(val, 0, 32)
+	if err != nil {
+		return 0, err
+	}
+	return int32(i), nil
+}
+
+// Int32Slice converts 'val' where individual integers are separated by
+// 'sep' into a int32 slice.
+func Int32Slice(val, sep string) ([]int32, error) {
+	s := strings.Split(val, sep)
+	values := make([]int32, len(s))
+	for i, v := range s {
+		value, err := Int32(v)
+		if err != nil {
+			return values, err
+		}
+		values[i] = value
+	}
+	return values, nil
+}
+
+// Uint64 converts the given string representation of an integer into uint64.
+func Uint64(val string) (uint64, error) {
+	return strconv.ParseUint(val, 0, 64)
+}
+
+// Uint64Slice converts 'val' where individual integers are separated by
+// 'sep' into a uint64 slice.
+func Uint64Slice(val, sep string) ([]uint64, error) {
+	s := strings.Split(val, sep)
+	values := make([]uint64, len(s))
+	for i, v := range s {
+		value, err := Uint64(v)
+		if err != nil {
+			return values, err
+		}
+		values[i] = value
+	}
+	return values, nil
+}
+
+// Uint32 converts the given string representation of an integer into uint32.
+func Uint32(val string) (uint32, error) {
+	i, err := strconv.ParseUint(val, 0, 32)
+	if err != nil {
+		return 0, err
+	}
+	return uint32(i), nil
+}
+
+// Uint32Slice converts 'val' where individual integers are separated by
+// 'sep' into a uint32 slice.
+func Uint32Slice(val, sep string) ([]uint32, error) {
+	s := strings.Split(val, sep)
+	values := make([]uint32, len(s))
+	for i, v := range s {
+		value, err := Uint32(v)
+		if err != nil {
+			return values, err
+		}
+		values[i] = value
+	}
+	return values, nil
+}
+
+// Bytes converts the given string representation of a byte sequence into a slice of bytes
+// A bytes sequence is encoded in URL-safe base64 without padding
+func Bytes(val string) ([]byte, error) {
+	b, err := base64.StdEncoding.DecodeString(val)
+	if err != nil {
+		b, err = base64.URLEncoding.DecodeString(val)
+		if err != nil {
+			return nil, err
+		}
+	}
+	return b, nil
+}
+
+// BytesSlice converts 'val' where individual bytes sequences, encoded in URL-safe
+// base64 without padding, are separated by 'sep' into a slice of bytes slices slice.
+func BytesSlice(val, sep string) ([][]byte, error) {
+	s := strings.Split(val, sep)
+	values := make([][]byte, len(s))
+	for i, v := range s {
+		value, err := Bytes(v)
+		if err != nil {
+			return values, err
+		}
+		values[i] = value
+	}
+	return values, nil
+}
+
+// Timestamp converts the given RFC3339 formatted string into a timestamp.Timestamp.
+func Timestamp(val string) (*timestamp.Timestamp, error) {
+	var r timestamp.Timestamp
+	err := jsonpb.UnmarshalString(val, &r)
+	if err != nil {
+		return nil, err
+	}
+	return &r, nil
+}
+
+// Duration converts the given string into a timestamp.Duration.
+func Duration(val string) (*duration.Duration, error) {
+	var r duration.Duration
+	err := jsonpb.UnmarshalString(val, &r)
+	if err != nil {
+		return nil, err
+	}
+	return &r, nil
+}
+
+// Enum converts the given string into an int32 that should be type casted into the
+// correct enum proto type.
+func Enum(val string, enumValMap map[string]int32) (int32, error) {
+	e, ok := enumValMap[val]
+	if ok {
+		return e, nil
+	}
+
+	i, err := Int32(val)
+	if err != nil {
+		return 0, fmt.Errorf("%s is not valid", val)
+	}
+	for _, v := range enumValMap {
+		if v == i {
+			return i, nil
+		}
+	}
+	return 0, fmt.Errorf("%s is not valid", val)
+}
+
+// EnumSlice converts 'val' where individual enums are separated by 'sep'
+// into a int32 slice. Each individual int32 should be type casted into the
+// correct enum proto type.
+func EnumSlice(val, sep string, enumValMap map[string]int32) ([]int32, error) {
+	s := strings.Split(val, sep)
+	values := make([]int32, len(s))
+	for i, v := range s {
+		value, err := Enum(v, enumValMap)
+		if err != nil {
+			return values, err
+		}
+		values[i] = value
+	}
+	return values, nil
+}
+
+/*
+	Support fot google.protobuf.wrappers on top of primitive types
+*/
+
+// StringValue well-known type support as wrapper around string type
+func StringValue(val string) (*wrappers.StringValue, error) {
+	return &wrappers.StringValue{Value: val}, nil
+}
+
+// FloatValue well-known type support as wrapper around float32 type
+func FloatValue(val string) (*wrappers.FloatValue, error) {
+	parsedVal, err := Float32(val)
+	return &wrappers.FloatValue{Value: parsedVal}, err
+}
+
+// DoubleValue well-known type support as wrapper around float64 type
+func DoubleValue(val string) (*wrappers.DoubleValue, error) {
+	parsedVal, err := Float64(val)
+	return &wrappers.DoubleValue{Value: parsedVal}, err
+}
+
+// BoolValue well-known type support as wrapper around bool type
+func BoolValue(val string) (*wrappers.BoolValue, error) {
+	parsedVal, err := Bool(val)
+	return &wrappers.BoolValue{Value: parsedVal}, err
+}
+
+// Int32Value well-known type support as wrapper around int32 type
+func Int32Value(val string) (*wrappers.Int32Value, error) {
+	parsedVal, err := Int32(val)
+	return &wrappers.Int32Value{Value: parsedVal}, err
+}
+
+// UInt32Value well-known type support as wrapper around uint32 type
+func UInt32Value(val string) (*wrappers.UInt32Value, error) {
+	parsedVal, err := Uint32(val)
+	return &wrappers.UInt32Value{Value: parsedVal}, err
+}
+
+// Int64Value well-known type support as wrapper around int64 type
+func Int64Value(val string) (*wrappers.Int64Value, error) {
+	parsedVal, err := Int64(val)
+	return &wrappers.Int64Value{Value: parsedVal}, err
+}
+
+// UInt64Value well-known type support as wrapper around uint64 type
+func UInt64Value(val string) (*wrappers.UInt64Value, error) {
+	parsedVal, err := Uint64(val)
+	return &wrappers.UInt64Value{Value: parsedVal}, err
+}
+
+// BytesValue well-known type support as wrapper around bytes[] type
+func BytesValue(val string) (*wrappers.BytesValue, error) {
+	parsedVal, err := Bytes(val)
+	return &wrappers.BytesValue{Value: parsedVal}, err
+}
diff --git a/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/doc.go b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/doc.go
new file mode 100644
index 000000000..b6e5ddf7a
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/doc.go
@@ -0,0 +1,5 @@
+/*
+Package runtime contains runtime helper functions used by
+servers which protoc-gen-grpc-gateway generates.
+*/
+package runtime
diff --git a/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/errors.go b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/errors.go
new file mode 100644
index 000000000..b2ce743bd
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/errors.go
@@ -0,0 +1,186 @@
+package runtime
+
+import (
+	"context"
+	"io"
+	"net/http"
+	"strings"
+
+	"github.com/grpc-ecosystem/grpc-gateway/internal"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/grpclog"
+	"google.golang.org/grpc/status"
+)
+
+// HTTPStatusFromCode converts a gRPC error code into the corresponding HTTP response status.
+// See: https://github.com/googleapis/googleapis/blob/master/google/rpc/code.proto
+func HTTPStatusFromCode(code codes.Code) int {
+	switch code {
+	case codes.OK:
+		return http.StatusOK
+	case codes.Canceled:
+		return http.StatusRequestTimeout
+	case codes.Unknown:
+		return http.StatusInternalServerError
+	case codes.InvalidArgument:
+		return http.StatusBadRequest
+	case codes.DeadlineExceeded:
+		return http.StatusGatewayTimeout
+	case codes.NotFound:
+		return http.StatusNotFound
+	case codes.AlreadyExists:
+		return http.StatusConflict
+	case codes.PermissionDenied:
+		return http.StatusForbidden
+	case codes.Unauthenticated:
+		return http.StatusUnauthorized
+	case codes.ResourceExhausted:
+		return http.StatusTooManyRequests
+	case codes.FailedPrecondition:
+		// Note, this deliberately doesn't translate to the similarly named '412 Precondition Failed' HTTP response status.
+		return http.StatusBadRequest
+	case codes.Aborted:
+		return http.StatusConflict
+	case codes.OutOfRange:
+		return http.StatusBadRequest
+	case codes.Unimplemented:
+		return http.StatusNotImplemented
+	case codes.Internal:
+		return http.StatusInternalServerError
+	case codes.Unavailable:
+		return http.StatusServiceUnavailable
+	case codes.DataLoss:
+		return http.StatusInternalServerError
+	}
+
+	grpclog.Infof("Unknown gRPC error code: %v", code)
+	return http.StatusInternalServerError
+}
+
+var (
+	// HTTPError replies to the request with an error.
+	//
+	// HTTPError is called:
+	//  - From generated per-endpoint gateway handler code, when calling the backend results in an error.
+	//  - From gateway runtime code, when forwarding the response message results in an error.
+	//
+	// The default value for HTTPError calls the custom error handler configured on the ServeMux via the
+	// WithProtoErrorHandler serve option if that option was used, calling GlobalHTTPErrorHandler otherwise.
+	//
+	// To customize the error handling of a particular ServeMux instance, use the WithProtoErrorHandler
+	// serve option.
+	//
+	// To customize the error format for all ServeMux instances not using the WithProtoErrorHandler serve
+	// option, set GlobalHTTPErrorHandler to a custom function.
+	//
+	// Setting this variable directly to customize error format is deprecated.
+	HTTPError = MuxOrGlobalHTTPError
+
+	// GlobalHTTPErrorHandler is the HTTPError handler for all ServeMux instances not using the
+	// WithProtoErrorHandler serve option.
+	//
+	// You can set a custom function to this variable to customize error format.
+	GlobalHTTPErrorHandler = DefaultHTTPError
+
+	// OtherErrorHandler handles gateway errors from parsing and routing client requests for all
+	// ServeMux instances not using the WithProtoErrorHandler serve option.
+	//
+	// It returns the following error codes: StatusMethodNotAllowed StatusNotFound StatusBadRequest
+	//
+	// To customize parsing and routing error handling of a particular ServeMux instance, use the
+	// WithProtoErrorHandler serve option.
+	//
+	// To customize parsing and routing error handling of all ServeMux instances not using the
+	// WithProtoErrorHandler serve option, set a custom function to this variable.
+	OtherErrorHandler = DefaultOtherErrorHandler
+)
+
+// MuxOrGlobalHTTPError uses the mux-configured error handler, falling back to GlobalErrorHandler.
+func MuxOrGlobalHTTPError(ctx context.Context, mux *ServeMux, marshaler Marshaler, w http.ResponseWriter, r *http.Request, err error) {
+	if mux.protoErrorHandler != nil {
+		mux.protoErrorHandler(ctx, mux, marshaler, w, r, err)
+	} else {
+		GlobalHTTPErrorHandler(ctx, mux, marshaler, w, r, err)
+	}
+}
+
+// DefaultHTTPError is the default implementation of HTTPError.
+// If "err" is an error from gRPC system, the function replies with the status code mapped by HTTPStatusFromCode.
+// If otherwise, it replies with http.StatusInternalServerError.
+//
+// The response body returned by this function is a JSON object,
+// which contains a member whose key is "error" and whose value is err.Error().
+func DefaultHTTPError(ctx context.Context, mux *ServeMux, marshaler Marshaler, w http.ResponseWriter, r *http.Request, err error) {
+	const fallback = `{"error": "failed to marshal error message"}`
+
+	s, ok := status.FromError(err)
+	if !ok {
+		s = status.New(codes.Unknown, err.Error())
+	}
+
+	w.Header().Del("Trailer")
+	w.Header().Del("Transfer-Encoding")
+
+	contentType := marshaler.ContentType()
+	// Check marshaler on run time in order to keep backwards compatibility
+	// An interface param needs to be added to the ContentType() function on
+	// the Marshal interface to be able to remove this check
+	if typeMarshaler, ok := marshaler.(contentTypeMarshaler); ok {
+		pb := s.Proto()
+		contentType = typeMarshaler.ContentTypeFromMessage(pb)
+	}
+	w.Header().Set("Content-Type", contentType)
+
+	body := &internal.Error{
+		Error:   s.Message(),
+		Message: s.Message(),
+		Code:    int32(s.Code()),
+		Details: s.Proto().GetDetails(),
+	}
+
+	buf, merr := marshaler.Marshal(body)
+	if merr != nil {
+		grpclog.Infof("Failed to marshal error message %q: %v", body, merr)
+		w.WriteHeader(http.StatusInternalServerError)
+		if _, err := io.WriteString(w, fallback); err != nil {
+			grpclog.Infof("Failed to write response: %v", err)
+		}
+		return
+	}
+
+	md, ok := ServerMetadataFromContext(ctx)
+	if !ok {
+		grpclog.Infof("Failed to extract ServerMetadata from context")
+	}
+
+	handleForwardResponseServerMetadata(w, mux, md)
+
+	// RFC 7230 https://tools.ietf.org/html/rfc7230#section-4.1.2
+	// Unless the request includes a TE header field indicating "trailers"
+	// is acceptable, as described in Section 4.3, a server SHOULD NOT
+	// generate trailer fields that it believes are necessary for the user
+	// agent to receive.
+	var wantsTrailers bool
+
+	if te := r.Header.Get("TE"); strings.Contains(strings.ToLower(te), "trailers") {
+		wantsTrailers = true
+		handleForwardResponseTrailerHeader(w, md)
+		w.Header().Set("Transfer-Encoding", "chunked")
+	}
+
+	st := HTTPStatusFromCode(s.Code())
+	w.WriteHeader(st)
+	if _, err := w.Write(buf); err != nil {
+		grpclog.Infof("Failed to write response: %v", err)
+	}
+
+	if wantsTrailers {
+		handleForwardResponseTrailer(w, md)
+	}
+}
+
+// DefaultOtherErrorHandler is the default implementation of OtherErrorHandler.
+// It simply writes a string representation of the given error into "w".
+func DefaultOtherErrorHandler(w http.ResponseWriter, _ *http.Request, msg string, code int) {
+	http.Error(w, msg, code)
+}
diff --git a/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/fieldmask.go b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/fieldmask.go
new file mode 100644
index 000000000..aef645e40
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/fieldmask.go
@@ -0,0 +1,89 @@
+package runtime
+
+import (
+	"encoding/json"
+	"io"
+	"strings"
+
+	descriptor2 "github.com/golang/protobuf/descriptor"
+	"github.com/golang/protobuf/protoc-gen-go/descriptor"
+	"google.golang.org/genproto/protobuf/field_mask"
+)
+
+func translateName(name string, md *descriptor.DescriptorProto) (string, *descriptor.DescriptorProto) {
+	// TODO - should really gate this with a test that the marshaller has used json names
+	if md != nil {
+		for _, f := range md.Field {
+			if f.JsonName != nil && f.Name != nil && *f.JsonName == name {
+				var subType *descriptor.DescriptorProto
+
+				// If the field has a TypeName then we retrieve the nested type for translating the embedded message names.
+				if f.TypeName != nil {
+					typeSplit := strings.Split(*f.TypeName, ".")
+					typeName := typeSplit[len(typeSplit)-1]
+					for _, t := range md.NestedType {
+						if typeName == *t.Name {
+							subType = t
+						}
+					}
+				}
+				return *f.Name, subType
+			}
+		}
+	}
+	return name, nil
+}
+
+// FieldMaskFromRequestBody creates a FieldMask printing all complete paths from the JSON body.
+func FieldMaskFromRequestBody(r io.Reader, md *descriptor.DescriptorProto) (*field_mask.FieldMask, error) {
+	fm := &field_mask.FieldMask{}
+	var root interface{}
+	if err := json.NewDecoder(r).Decode(&root); err != nil {
+		if err == io.EOF {
+			return fm, nil
+		}
+		return nil, err
+	}
+
+	queue := []fieldMaskPathItem{{node: root, md: md}}
+	for len(queue) > 0 {
+		// dequeue an item
+		item := queue[0]
+		queue = queue[1:]
+
+		if m, ok := item.node.(map[string]interface{}); ok {
+			// if the item is an object, then enqueue all of its children
+			for k, v := range m {
+				protoName, subMd := translateName(k, item.md)
+				if subMsg, ok := v.(descriptor2.Message); ok {
+					_, subMd = descriptor2.ForMessage(subMsg)
+				}
+
+				var path string
+				if item.path == "" {
+					path = protoName
+				} else {
+					path = item.path + "." + protoName
+				}
+				queue = append(queue, fieldMaskPathItem{path: path, node: v, md: subMd})
+			}
+		} else if len(item.path) > 0 {
+			// otherwise, it's a leaf node so print its path
+			fm.Paths = append(fm.Paths, item.path)
+		}
+	}
+
+	return fm, nil
+}
+
+// fieldMaskPathItem stores a in-progress deconstruction of a path for a fieldmask
+type fieldMaskPathItem struct {
+	// the list of prior fields leading up to node connected by dots
+	path string
+
+	// a generic decoded json object the current item to inspect for further path extraction
+	node interface{}
+
+	// descriptor for parent message
+	md *descriptor.DescriptorProto
+}
diff --git a/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/handler.go b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/handler.go
new file mode 100644
index 000000000..e6e8f286e
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/handler.go
@@ -0,0 +1,212 @@
+package runtime
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"io"
+	"net/http"
+	"net/textproto"
+
+	"github.com/golang/protobuf/proto"
+	"github.com/grpc-ecosystem/grpc-gateway/internal"
+	"google.golang.org/grpc/grpclog"
+)
+
+var errEmptyResponse = errors.New("empty response")
+
+// ForwardResponseStream forwards the stream from gRPC server to REST client.
+func ForwardResponseStream(ctx context.Context, mux *ServeMux, marshaler Marshaler, w http.ResponseWriter, req *http.Request, recv func() (proto.Message, error), opts ...func(context.Context, http.ResponseWriter, proto.Message) error) {
+	f, ok := w.(http.Flusher)
+	if !ok {
+		grpclog.Infof("Flush not supported in %T", w)
+		http.Error(w, "unexpected type of web server", http.StatusInternalServerError)
+		return
+	}
+
+	md, ok := ServerMetadataFromContext(ctx)
+	if !ok {
+		grpclog.Infof("Failed to extract ServerMetadata from context")
+		http.Error(w, "unexpected error", http.StatusInternalServerError)
+		return
+	}
+	handleForwardResponseServerMetadata(w, mux, md)
+
+	w.Header().Set("Transfer-Encoding", "chunked")
+	w.Header().Set("Content-Type", marshaler.ContentType())
+	if err := handleForwardResponseOptions(ctx, w, nil, opts); err != nil {
+		HTTPError(ctx, mux, marshaler, w, req, err)
+		return
+	}
+
+	var delimiter []byte
+	if d, ok := marshaler.(Delimited); ok {
+		delimiter = d.Delimiter()
+	} else {
+		delimiter = []byte("\n")
+	}
+
+	var wroteHeader bool
+	for {
+		resp, err := recv()
+		if err == io.EOF {
+			return
+		}
+		if err != nil {
+			handleForwardResponseStreamError(ctx, wroteHeader, marshaler, w, req, mux, err)
+			return
+		}
+		if err := handleForwardResponseOptions(ctx, w, resp, opts); err != nil {
+			handleForwardResponseStreamError(ctx, wroteHeader, marshaler, w, req, mux, err)
+			return
+		}
+
+		var buf []byte
+		switch {
+		case resp == nil:
+			buf, err = marshaler.Marshal(errorChunk(streamError(ctx, mux.streamErrorHandler, errEmptyResponse)))
+		default:
+			result := map[string]interface{}{"result": resp}
+			if rb, ok := resp.(responseBody); ok {
+				result["result"] = rb.XXX_ResponseBody()
+			}
+
+			buf, err = marshaler.Marshal(result)
+		}
+
+		if err != nil {
+			grpclog.Infof("Failed to marshal response chunk: %v", err)
+			handleForwardResponseStreamError(ctx, wroteHeader, marshaler, w, req, mux, err)
+			return
+		}
+		if _, err = w.Write(buf); err != nil {
+			grpclog.Infof("Failed to send response chunk: %v", err)
+			return
+		}
+		wroteHeader = true
+		if _, err = w.Write(delimiter); err != nil {
+			grpclog.Infof("Failed to send delimiter chunk: %v", err)
+			return
+		}
+		f.Flush()
+	}
+}
+
+func handleForwardResponseServerMetadata(w http.ResponseWriter, mux *ServeMux, md ServerMetadata) {
+	for k, vs := range md.HeaderMD {
+		if h, ok := mux.outgoingHeaderMatcher(k); ok {
+			for _, v := range vs {
+				w.Header().Add(h, v)
+			}
+		}
+	}
+}
+
+func handleForwardResponseTrailerHeader(w http.ResponseWriter, md ServerMetadata) {
+	for k := range md.TrailerMD {
+		tKey := textproto.CanonicalMIMEHeaderKey(fmt.Sprintf("%s%s", MetadataTrailerPrefix, k))
+		w.Header().Add("Trailer", tKey)
+	}
+}
+
+func handleForwardResponseTrailer(w http.ResponseWriter, md ServerMetadata) {
+	for k, vs := range md.TrailerMD {
+		tKey := fmt.Sprintf("%s%s", MetadataTrailerPrefix, k)
+		for _, v := range vs {
+			w.Header().Add(tKey, v)
+		}
+	}
+}
+
+// responseBody interface contains method for getting field for marshaling to the response body
+// this method is generated for response struct from the value of `response_body` in the `google.api.HttpRule`
+type responseBody interface {
+	XXX_ResponseBody() interface{}
+}
+
+// ForwardResponseMessage forwards the message "resp" from gRPC server to REST client.
+func ForwardResponseMessage(ctx context.Context, mux *ServeMux, marshaler Marshaler, w http.ResponseWriter, req *http.Request, resp proto.Message, opts ...func(context.Context, http.ResponseWriter, proto.Message) error) {
+	md, ok := ServerMetadataFromContext(ctx)
+	if !ok {
+		grpclog.Infof("Failed to extract ServerMetadata from context")
+	}
+
+	handleForwardResponseServerMetadata(w, mux, md)
+	handleForwardResponseTrailerHeader(w, md)
+
+	contentType := marshaler.ContentType()
+	// Check marshaler on run time in order to keep backwards compatibility
+	// An interface param needs to be added to the ContentType() function on
+	// the Marshal interface to be able to remove this check
+	if typeMarshaler, ok := marshaler.(contentTypeMarshaler); ok {
+		contentType = typeMarshaler.ContentTypeFromMessage(resp)
+	}
+	w.Header().Set("Content-Type", contentType)
+
+	if err := handleForwardResponseOptions(ctx, w, resp, opts); err != nil {
+		HTTPError(ctx, mux, marshaler, w, req, err)
+		return
+	}
+	var buf []byte
+	var err error
+	if rb, ok := resp.(responseBody); ok {
+		buf, err = marshaler.Marshal(rb.XXX_ResponseBody())
+	} else {
+		buf, err = marshaler.Marshal(resp)
+	}
+	if err != nil {
+		grpclog.Infof("Marshal error: %v", err)
+		HTTPError(ctx, mux, marshaler, w, req, err)
+		return
+	}
+
+	if _, err = w.Write(buf); err != nil {
+		grpclog.Infof("Failed to write response: %v", err)
+	}
+
+	handleForwardResponseTrailer(w, md)
+}
+
+func handleForwardResponseOptions(ctx context.Context, w http.ResponseWriter, resp proto.Message, opts []func(context.Context, http.ResponseWriter, proto.Message) error) error {
+	if len(opts) == 0 {
+		return nil
+	}
+	for _, opt := range opts {
+		if err := opt(ctx, w, resp); err != nil {
+			grpclog.Infof("Error handling ForwardResponseOptions: %v", err)
+			return err
+		}
+	}
+	return nil
+}
+
+func handleForwardResponseStreamError(ctx context.Context, wroteHeader bool, marshaler Marshaler, w http.ResponseWriter, req *http.Request, mux *ServeMux, err error) {
+	serr := streamError(ctx, mux.streamErrorHandler, err)
+	if !wroteHeader {
+		w.WriteHeader(int(serr.HttpCode))
+	}
+	buf, merr := marshaler.Marshal(errorChunk(serr))
+	if merr != nil {
+		grpclog.Infof("Failed to marshal an error: %v", merr)
+		return
+	}
+	if _, werr := w.Write(buf); werr != nil {
+		grpclog.Infof("Failed to notify error to client: %v", werr)
+		return
+	}
+}
+
+// streamError returns the payload for the final message in a response stream
+// that represents the given err.
+func streamError(ctx context.Context, errHandler StreamErrorHandlerFunc, err error) *StreamError {
+	serr := errHandler(ctx, err)
+	if serr != nil {
+		return serr
+	}
+	// TODO: log about misbehaving stream error handler?
+	return DefaultHTTPStreamErrorHandler(ctx, err)
+}
+
+func errorChunk(err *StreamError) map[string]proto.Message {
+	return map[string]proto.Message{"error": (*internal.StreamError)(err)}
+}
diff --git a/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/marshal_httpbodyproto.go b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/marshal_httpbodyproto.go
new file mode 100644
index 000000000..525b0338c
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/marshal_httpbodyproto.go
@@ -0,0 +1,43 @@
+package runtime
+
+import (
+	"google.golang.org/genproto/googleapis/api/httpbody"
+)
+
+// SetHTTPBodyMarshaler overwrite the default marshaler with the HTTPBodyMarshaler
+func SetHTTPBodyMarshaler(serveMux *ServeMux) {
+	serveMux.marshalers.mimeMap[MIMEWildcard] = &HTTPBodyMarshaler{
+		Marshaler: &JSONPb{OrigName: true},
+	}
+}
+
+// HTTPBodyMarshaler is a Marshaler which supports marshaling of a
+// google.api.HttpBody message as the full response body if it is
+// the actual message used as the response. If not, then this will
+// simply fallback to the Marshaler specified as its default Marshaler.
+type HTTPBodyMarshaler struct {
+	Marshaler
+}
+
+// ContentType implementation to keep backwards compatibility with marshal interface
+func (h *HTTPBodyMarshaler) ContentType() string {
+	return h.ContentTypeFromMessage(nil)
+}
+
+// ContentTypeFromMessage in case v is a google.api.HttpBody message it returns
+// its specified content type otherwise fall back to the default Marshaler.
+func (h *HTTPBodyMarshaler) ContentTypeFromMessage(v interface{}) string {
+	if httpBody, ok := v.(*httpbody.HttpBody); ok {
+		return httpBody.GetContentType()
+	}
+	return h.Marshaler.ContentType()
+}
+
+// Marshal marshals "v" by returning the body bytes if v is a
+// google.api.HttpBody message, otherwise it falls back to the default Marshaler.
+func (h *HTTPBodyMarshaler) Marshal(v interface{}) ([]byte, error) {
+	if httpBody, ok := v.(*httpbody.HttpBody); ok {
+		return httpBody.Data, nil
+	}
+	return h.Marshaler.Marshal(v)
+}
diff --git a/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/marshal_json.go b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/marshal_json.go
new file mode 100644
index 000000000..f9d3a585a
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/marshal_json.go
@@ -0,0 +1,45 @@
+package runtime
+
+import (
+	"encoding/json"
+	"io"
+)
+
+// JSONBuiltin is a Marshaler which marshals/unmarshals into/from JSON
+// with the standard "encoding/json" package of Golang.
+// Although it is generally faster for simple proto messages than JSONPb,
+// it does not support advanced features of protobuf, e.g. map, oneof, ....
+//
+// The NewEncoder and NewDecoder types return *json.Encoder and
+// *json.Decoder respectively.
+type JSONBuiltin struct{}
+
+// ContentType always Returns "application/json".
+func (*JSONBuiltin) ContentType() string {
+	return "application/json"
+}
+
+// Marshal marshals "v" into JSON
+func (j *JSONBuiltin) Marshal(v interface{}) ([]byte, error) {
+	return json.Marshal(v)
+}
+
+// Unmarshal unmarshals JSON data into "v".
+func (j *JSONBuiltin) Unmarshal(data []byte, v interface{}) error {
+	return json.Unmarshal(data, v)
+}
+
+// NewDecoder returns a Decoder which reads JSON stream from "r".
+func (j *JSONBuiltin) NewDecoder(r io.Reader) Decoder {
+	return json.NewDecoder(r)
+}
+
+// NewEncoder returns an Encoder which writes JSON stream into "w".
+func (j *JSONBuiltin) NewEncoder(w io.Writer) Encoder {
+	return json.NewEncoder(w)
+}
+
+// Delimiter for newline encoded JSON streams.
+func (j *JSONBuiltin) Delimiter() []byte {
+	return []byte("\n")
+}
diff --git a/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/marshal_jsonpb.go b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/marshal_jsonpb.go
new file mode 100644
index 000000000..f0de351b2
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/marshal_jsonpb.go
@@ -0,0 +1,262 @@
+package runtime
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"io"
+	"reflect"
+
+	"github.com/golang/protobuf/jsonpb"
+	"github.com/golang/protobuf/proto"
+)
+
+// JSONPb is a Marshaler which marshals/unmarshals into/from JSON
+// with the "github.com/golang/protobuf/jsonpb".
+// It supports fully functionality of protobuf unlike JSONBuiltin.
+//
+// The NewDecoder method returns a DecoderWrapper, so the underlying
+// *json.Decoder methods can be used.
+type JSONPb jsonpb.Marshaler
+
+// ContentType always returns "application/json".
+func (*JSONPb) ContentType() string {
+	return "application/json"
+}
+
+// Marshal marshals "v" into JSON.
+func (j *JSONPb) Marshal(v interface{}) ([]byte, error) {
+	if _, ok := v.(proto.Message); !ok {
+		return j.marshalNonProtoField(v)
+	}
+
+	var buf bytes.Buffer
+	if err := j.marshalTo(&buf, v); err != nil {
+		return nil, err
+	}
+	return buf.Bytes(), nil
+}
+
+func (j *JSONPb) marshalTo(w io.Writer, v interface{}) error {
+	p, ok := v.(proto.Message)
+	if !ok {
+		buf, err := j.marshalNonProtoField(v)
+		if err != nil {
+			return err
+		}
+		_, err = w.Write(buf)
+		return err
+	}
+	return (*jsonpb.Marshaler)(j).Marshal(w, p)
+}
+
+var (
+	// protoMessageType is stored to prevent constant lookup of the same type at runtime.
+	protoMessageType = reflect.TypeOf((*proto.Message)(nil)).Elem()
+)
+
+// marshalNonProto marshals a non-message field of a protobuf message.
+// This function does not correctly marshals arbitrary data structure into JSON,
+// but it is only capable of marshaling non-message field values of protobuf,
+// i.e. primitive types, enums; pointers to primitives or enums; maps from
+// integer/string types to primitives/enums/pointers to messages.
+func (j *JSONPb) marshalNonProtoField(v interface{}) ([]byte, error) {
+	if v == nil {
+		return []byte("null"), nil
+	}
+	rv := reflect.ValueOf(v)
+	for rv.Kind() == reflect.Ptr {
+		if rv.IsNil() {
+			return []byte("null"), nil
+		}
+		rv = rv.Elem()
+	}
+
+	if rv.Kind() == reflect.Slice {
+		if rv.IsNil() {
+			if j.EmitDefaults {
+				return []byte("[]"), nil
+			}
+			return []byte("null"), nil
+		}
+
+		if rv.Type().Elem().Implements(protoMessageType) {
+			var buf bytes.Buffer
+			err := buf.WriteByte('[')
+			if err != nil {
+				return nil, err
+			}
+			for i := 0; i < rv.Len(); i++ {
+				if i != 0 {
+					err = buf.WriteByte(',')
+					if err != nil {
+						return nil, err
+					}
+				}
+				if err = (*jsonpb.Marshaler)(j).Marshal(&buf, rv.Index(i).Interface().(proto.Message)); err != nil {
+					return nil, err
+				}
+			}
+			err = buf.WriteByte(']')
+			if err != nil {
+				return nil, err
+			}
+
+			return buf.Bytes(), nil
+		}
+	}
+
+	if rv.Kind() == reflect.Map {
+		m := make(map[string]*json.RawMessage)
+		for _, k := range rv.MapKeys() {
+			buf, err := j.Marshal(rv.MapIndex(k).Interface())
+			if err != nil {
+				return nil, err
+			}
+			m[fmt.Sprintf("%v", k.Interface())] = (*json.RawMessage)(&buf)
+		}
+		if j.Indent != "" {
+			return json.MarshalIndent(m, "", j.Indent)
+		}
+		return json.Marshal(m)
+	}
+	if enum, ok := rv.Interface().(protoEnum); ok && !j.EnumsAsInts {
+		return json.Marshal(enum.String())
+	}
+	return json.Marshal(rv.Interface())
+}
+
+// Unmarshal unmarshals JSON "data" into "v"
+func (j *JSONPb) Unmarshal(data []byte, v interface{}) error {
+	return unmarshalJSONPb(data, v)
+}
+
+// NewDecoder returns a Decoder which reads JSON stream from "r".
+func (j *JSONPb) NewDecoder(r io.Reader) Decoder {
+	d := json.NewDecoder(r)
+	return DecoderWrapper{Decoder: d}
+}
+
+// DecoderWrapper is a wrapper around a *json.Decoder that adds
+// support for protos to the Decode method.
+type DecoderWrapper struct {
+	*json.Decoder
+}
+
+// Decode wraps the embedded decoder's Decode method to support
+// protos using a jsonpb.Unmarshaler.
+func (d DecoderWrapper) Decode(v interface{}) error {
+	return decodeJSONPb(d.Decoder, v)
+}
+
+// NewEncoder returns an Encoder which writes JSON stream into "w".
+func (j *JSONPb) NewEncoder(w io.Writer) Encoder {
+	return EncoderFunc(func(v interface{}) error {
+		if err := j.marshalTo(w, v); err != nil {
+			return err
+		}
+		// mimic json.Encoder by adding a newline (makes output
+		// easier to read when it contains multiple encoded items)
+		_, err := w.Write(j.Delimiter())
+		return err
+	})
+}
+
+func unmarshalJSONPb(data []byte, v interface{}) error {
+	d := json.NewDecoder(bytes.NewReader(data))
+	return decodeJSONPb(d, v)
+}
+
+func decodeJSONPb(d *json.Decoder, v interface{}) error {
+	p, ok := v.(proto.Message)
+	if !ok {
+		return decodeNonProtoField(d, v)
+	}
+	unmarshaler := &jsonpb.Unmarshaler{AllowUnknownFields: allowUnknownFields}
+	return unmarshaler.UnmarshalNext(d, p)
+}
+
+func decodeNonProtoField(d *json.Decoder, v interface{}) error {
+	rv := reflect.ValueOf(v)
+	if rv.Kind() != reflect.Ptr {
+		return fmt.Errorf("%T is not a pointer", v)
+	}
+	for rv.Kind() == reflect.Ptr {
+		if rv.IsNil() {
+			rv.Set(reflect.New(rv.Type().Elem()))
+		}
+		if rv.Type().ConvertibleTo(typeProtoMessage) {
+			unmarshaler := &jsonpb.Unmarshaler{AllowUnknownFields: allowUnknownFields}
+			return unmarshaler.UnmarshalNext(d, rv.Interface().(proto.Message))
+		}
+		rv = rv.Elem()
+	}
+	if rv.Kind() == reflect.Map {
+		if rv.IsNil() {
+			rv.Set(reflect.MakeMap(rv.Type()))
+		}
+		conv, ok := convFromType[rv.Type().Key().Kind()]
+		if !ok {
+			return fmt.Errorf("unsupported type of map field key: %v", rv.Type().Key())
+		}
+
+		m := make(map[string]*json.RawMessage)
+		if err := d.Decode(&m); err != nil {
+			return err
+		}
+		for k, v := range m {
+			result := conv.Call([]reflect.Value{reflect.ValueOf(k)})
+			if err := result[1].Interface(); err != nil {
+				return err.(error)
+			}
+			bk := result[0]
+			bv := reflect.New(rv.Type().Elem())
+			if err := unmarshalJSONPb([]byte(*v), bv.Interface()); err != nil {
+				return err
+			}
+			rv.SetMapIndex(bk, bv.Elem())
+		}
+		return nil
+	}
+	if _, ok := rv.Interface().(protoEnum); ok {
+		var repr interface{}
+		if err := d.Decode(&repr); err != nil {
+			return err
+		}
+		switch repr.(type) {
+		case string:
+			// TODO(yugui) Should use proto.StructProperties?
+			return fmt.Errorf("unmarshaling of symbolic enum %q not supported: %T", repr, rv.Interface())
+		case float64:
+			rv.Set(reflect.ValueOf(int32(repr.(float64))).Convert(rv.Type()))
+			return nil
+		default:
+			return fmt.Errorf("cannot assign %#v into Go type %T", repr, rv.Interface())
+		}
+	}
+	return d.Decode(v)
+}
+
+type protoEnum interface {
+	fmt.Stringer
+	EnumDescriptor() ([]byte, []int)
+}
+
+var typeProtoMessage = reflect.TypeOf((*proto.Message)(nil)).Elem()
+
+// Delimiter for newline encoded JSON streams.
+func (j *JSONPb) Delimiter() []byte {
+	return []byte("\n")
+}
+
+// allowUnknownFields helps not to return an error when the destination
+// is a struct and the input contains object keys which do not match any
+// non-ignored, exported fields in the destination.
+var allowUnknownFields = true
+
+// DisallowUnknownFields enables option in decoder (unmarshaller) to
+// return an error when it finds an unknown field. This function must be
+// called before using the JSON marshaller.
+func DisallowUnknownFields() {
+	allowUnknownFields = false
+}
diff --git a/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/marshal_proto.go b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/marshal_proto.go
new file mode 100644
index 000000000..f65d1a267
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/marshal_proto.go
@@ -0,0 +1,62 @@
+package runtime
+
+import (
+	"io"
+
+	"errors"
+	"github.com/golang/protobuf/proto"
+	"io/ioutil"
+)
+
+// ProtoMarshaller is a Marshaller which marshals/unmarshals into/from serialize proto bytes
+type ProtoMarshaller struct{}
+
+// ContentType always returns "application/octet-stream".
+func (*ProtoMarshaller) ContentType() string {
+	return "application/octet-stream"
+}
+
+// Marshal marshals "value" into Proto
+func (*ProtoMarshaller) Marshal(value interface{}) ([]byte, error) {
+	message, ok := value.(proto.Message)
+	if !ok {
+		return nil, errors.New("unable to marshal non proto field")
+	}
+	return proto.Marshal(message)
+}
+
+// Unmarshal unmarshals proto "data" into "value"
+func (*ProtoMarshaller) Unmarshal(data []byte, value interface{}) error {
+	message, ok := value.(proto.Message)
+	if !ok {
+		return errors.New("unable to unmarshal non proto field")
+	}
+	return proto.Unmarshal(data, message)
+}
+
+// NewDecoder returns a Decoder which reads proto stream from "reader".
+func (marshaller *ProtoMarshaller) NewDecoder(reader io.Reader) Decoder {
+	return DecoderFunc(func(value interface{}) error {
+		buffer, err := ioutil.ReadAll(reader)
+		if err != nil {
+			return err
+		}
+		return marshaller.Unmarshal(buffer, value)
+	})
+}
+
+// NewEncoder returns an Encoder which writes proto stream into "writer".
+func (marshaller *ProtoMarshaller) NewEncoder(writer io.Writer) Encoder {
+	return EncoderFunc(func(value interface{}) error {
+		buffer, err := marshaller.Marshal(value)
+		if err != nil {
+			return err
+		}
+		_, err = writer.Write(buffer)
+		if err != nil {
+			return err
+		}
+
+		return nil
+	})
+}
diff --git a/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/marshaler.go b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/marshaler.go
new file mode 100644
index 000000000..461532942
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/marshaler.go
@@ -0,0 +1,55 @@
+package runtime
+
+import (
+	"io"
+)
+
+// Marshaler defines a conversion between byte sequence and gRPC payloads / fields.
+type Marshaler interface {
+	// Marshal marshals "v" into byte sequence.
+	Marshal(v interface{}) ([]byte, error)
+	// Unmarshal unmarshals "data" into "v".
+	// "v" must be a pointer value.
+	Unmarshal(data []byte, v interface{}) error
+	// NewDecoder returns a Decoder which reads byte sequence from "r".
+	NewDecoder(r io.Reader) Decoder
+	// NewEncoder returns an Encoder which writes bytes sequence into "w".
+	NewEncoder(w io.Writer) Encoder
+	// ContentType returns the Content-Type which this marshaler is responsible for.
+	ContentType() string
+}
+
+// Marshalers that implement contentTypeMarshaler will have their ContentTypeFromMessage method called
+// to set the Content-Type header on the response
+type contentTypeMarshaler interface {
+	// ContentTypeFromMessage returns the Content-Type this marshaler produces from the provided message
+	ContentTypeFromMessage(v interface{}) string
+}
+
+// Decoder decodes a byte sequence
+type Decoder interface {
+	Decode(v interface{}) error
+}
+
+// Encoder encodes gRPC payloads / fields into byte sequence.
+type Encoder interface {
+	Encode(v interface{}) error
+}
+
+// DecoderFunc adapts an decoder function into Decoder.
+type DecoderFunc func(v interface{}) error
+
+// Decode delegates invocations to the underlying function itself.
+func (f DecoderFunc) Decode(v interface{}) error { return f(v) }
+
+// EncoderFunc adapts an encoder function into Encoder
+type EncoderFunc func(v interface{}) error
+
+// Encode delegates invocations to the underlying function itself.
+func (f EncoderFunc) Encode(v interface{}) error { return f(v) }
+
+// Delimited defines the streaming delimiter.
+type Delimited interface {
+	// Delimiter returns the record separator for the stream.
+	Delimiter() []byte
+}
diff --git a/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/marshaler_registry.go b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/marshaler_registry.go
new file mode 100644
index 000000000..8dd5c24db
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/marshaler_registry.go
@@ -0,0 +1,99 @@
+package runtime
+
+import (
+	"errors"
+	"mime"
+	"net/http"
+
+	"google.golang.org/grpc/grpclog"
+)
+
+// MIMEWildcard is the fallback MIME type used for requests which do not match
+// a registered MIME type.
+const MIMEWildcard = "*"
+
+var (
+	acceptHeader      = http.CanonicalHeaderKey("Accept")
+	contentTypeHeader = http.CanonicalHeaderKey("Content-Type")
+
+	defaultMarshaler = &JSONPb{OrigName: true}
+)
+
+// MarshalerForRequest returns the inbound/outbound marshalers for this request.
+// It checks the registry on the ServeMux for the MIME type set by the Content-Type header.
+// If it isn't set (or the request Content-Type is empty), checks for "*".
+// If there are multiple Content-Type headers set, choose the first one that it can
+// exactly match in the registry.
+// Otherwise, it follows the above logic for "*"/InboundMarshaler/OutboundMarshaler.
+func MarshalerForRequest(mux *ServeMux, r *http.Request) (inbound Marshaler, outbound Marshaler) {
+	for _, acceptVal := range r.Header[acceptHeader] {
+		if m, ok := mux.marshalers.mimeMap[acceptVal]; ok {
+			outbound = m
+			break
+		}
+	}
+
+	for _, contentTypeVal := range r.Header[contentTypeHeader] {
+		contentType, _, err := mime.ParseMediaType(contentTypeVal)
+		if err != nil {
+			grpclog.Infof("Failed to parse Content-Type %s: %v", contentTypeVal, err)
+			continue
+		}
+		if m, ok := mux.marshalers.mimeMap[contentType]; ok {
+			inbound = m
+			break
+		}
+	}
+
+	if inbound == nil {
+		inbound = mux.marshalers.mimeMap[MIMEWildcard]
+	}
+	if outbound == nil {
+		outbound = inbound
+	}
+
+	return inbound, outbound
+}
+
+// marshalerRegistry is a mapping from MIME types to Marshalers.
+type marshalerRegistry struct {
+	mimeMap map[string]Marshaler
+}
+
+// add adds a marshaler for a case-sensitive MIME type string ("*" to match any
+// MIME type).
+func (m marshalerRegistry) add(mime string, marshaler Marshaler) error {
+	if len(mime) == 0 {
+		return errors.New("empty MIME type")
+	}
+
+	m.mimeMap[mime] = marshaler
+
+	return nil
+}
+
+// makeMarshalerMIMERegistry returns a new registry of marshalers.
+// It allows for a mapping of case-sensitive Content-Type MIME type string to runtime.Marshaler interfaces.
+//
+// For example, you could allow the client to specify the use of the runtime.JSONPb marshaler
+// with a "application/jsonpb" Content-Type and the use of the runtime.JSONBuiltin marshaler
+// with a "application/json" Content-Type.
+// "*" can be used to match any Content-Type.
+// This can be attached to a ServerMux with the marshaler option.
+func makeMarshalerMIMERegistry() marshalerRegistry {
+	return marshalerRegistry{
+		mimeMap: map[string]Marshaler{
+			MIMEWildcard: defaultMarshaler,
+		},
+	}
+}
+
+// WithMarshalerOption returns a ServeMuxOption which associates inbound and outbound
+// Marshalers to a MIME type in mux.
+func WithMarshalerOption(mime string, marshaler Marshaler) ServeMuxOption {
+	return func(mux *ServeMux) {
+		if err := mux.marshalers.add(mime, marshaler); err != nil {
+			panic(err)
+		}
+	}
+}
diff --git a/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/mux.go b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/mux.go
new file mode 100644
index 000000000..523a9cb43
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/mux.go
@@ -0,0 +1,300 @@
+package runtime
+
+import (
+	"context"
+	"fmt"
+	"net/http"
+	"net/textproto"
+	"strings"
+
+	"github.com/golang/protobuf/proto"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/metadata"
+	"google.golang.org/grpc/status"
+)
+
+// A HandlerFunc handles a specific pair of path pattern and HTTP method.
+type HandlerFunc func(w http.ResponseWriter, r *http.Request, pathParams map[string]string)
+
+// ErrUnknownURI is the error supplied to a custom ProtoErrorHandlerFunc when
+// a request is received with a URI path that does not match any registered
+// service method.
+//
+// Since gRPC servers return an "Unimplemented" code for requests with an
+// unrecognized URI path, this error also has a gRPC "Unimplemented" code.
+var ErrUnknownURI = status.Error(codes.Unimplemented, http.StatusText(http.StatusNotImplemented))
+
+// ServeMux is a request multiplexer for grpc-gateway.
+// It matches http requests to patterns and invokes the corresponding handler.
+type ServeMux struct {
+	// handlers maps HTTP method to a list of handlers.
+	handlers                  map[string][]handler
+	forwardResponseOptions    []func(context.Context, http.ResponseWriter, proto.Message) error
+	marshalers                marshalerRegistry
+	incomingHeaderMatcher     HeaderMatcherFunc
+	outgoingHeaderMatcher     HeaderMatcherFunc
+	metadataAnnotators        []func(context.Context, *http.Request) metadata.MD
+	streamErrorHandler        StreamErrorHandlerFunc
+	protoErrorHandler         ProtoErrorHandlerFunc
+	disablePathLengthFallback bool
+	lastMatchWins             bool
+}
+
+// ServeMuxOption is an option that can be given to a ServeMux on construction.
+type ServeMuxOption func(*ServeMux)
+
+// WithForwardResponseOption returns a ServeMuxOption representing the forwardResponseOption.
+//
+// forwardResponseOption is an option that will be called on the relevant context.Context,
+// http.ResponseWriter, and proto.Message before every forwarded response.
+//
+// The message may be nil in the case where just a header is being sent.
+func WithForwardResponseOption(forwardResponseOption func(context.Context, http.ResponseWriter, proto.Message) error) ServeMuxOption {
+	return func(serveMux *ServeMux) {
+		serveMux.forwardResponseOptions = append(serveMux.forwardResponseOptions, forwardResponseOption)
+	}
+}
+
+// SetQueryParameterParser sets the query parameter parser, used to populate message from query parameters.
+// Configuring this will mean the generated swagger output is no longer correct, and it should be
+// done with careful consideration.
+func SetQueryParameterParser(queryParameterParser QueryParameterParser) ServeMuxOption {
+	return func(serveMux *ServeMux) {
+		currentQueryParser = queryParameterParser
+	}
+}
+
+// HeaderMatcherFunc checks whether a header key should be forwarded to/from gRPC context.
+type HeaderMatcherFunc func(string) (string, bool)
+
+// DefaultHeaderMatcher is used to pass http request headers to/from gRPC context. This adds permanent HTTP header
+// keys (as specified by the IANA) to gRPC context with grpcgateway- prefix. HTTP headers that start with
+// 'Grpc-Metadata-' are mapped to gRPC metadata after removing prefix 'Grpc-Metadata-'.
+func DefaultHeaderMatcher(key string) (string, bool) {
+	key = textproto.CanonicalMIMEHeaderKey(key)
+	if isPermanentHTTPHeader(key) {
+		return MetadataPrefix + key, true
+	} else if strings.HasPrefix(key, MetadataHeaderPrefix) {
+		return key[len(MetadataHeaderPrefix):], true
+	}
+	return "", false
+}
+
+// WithIncomingHeaderMatcher returns a ServeMuxOption representing a headerMatcher for incoming request to gateway.
+//
+// This matcher will be called with each header in http.Request. If matcher returns true, that header will be
+// passed to gRPC context. To transform the header before passing to gRPC context, matcher should return modified header.
+func WithIncomingHeaderMatcher(fn HeaderMatcherFunc) ServeMuxOption {
+	return func(mux *ServeMux) {
+		mux.incomingHeaderMatcher = fn
+	}
+}
+
+// WithOutgoingHeaderMatcher returns a ServeMuxOption representing a headerMatcher for outgoing response from gateway.
+//
+// This matcher will be called with each header in response header metadata. If matcher returns true, that header will be
+// passed to http response returned from gateway. To transform the header before passing to response,
+// matcher should return modified header.
+func WithOutgoingHeaderMatcher(fn HeaderMatcherFunc) ServeMuxOption {
+	return func(mux *ServeMux) {
+		mux.outgoingHeaderMatcher = fn
+	}
+}
+
+// WithMetadata returns a ServeMuxOption for passing metadata to a gRPC context.
+//
+// This can be used by services that need to read from http.Request and modify gRPC context. A common use case
+// is reading token from cookie and adding it in gRPC context.
+func WithMetadata(annotator func(context.Context, *http.Request) metadata.MD) ServeMuxOption {
+	return func(serveMux *ServeMux) {
+		serveMux.metadataAnnotators = append(serveMux.metadataAnnotators, annotator)
+	}
+}
+
+// WithProtoErrorHandler returns a ServeMuxOption for configuring a custom error handler.
+//
+// This can be used to handle an error as general proto message defined by gRPC.
+// When this option is used, the mux uses the configured error handler instead of HTTPError and
+// OtherErrorHandler.
+func WithProtoErrorHandler(fn ProtoErrorHandlerFunc) ServeMuxOption {
+	return func(serveMux *ServeMux) {
+		serveMux.protoErrorHandler = fn
+	}
+}
+
+// WithDisablePathLengthFallback returns a ServeMuxOption for disable path length fallback.
+func WithDisablePathLengthFallback() ServeMuxOption {
+	return func(serveMux *ServeMux) {
+		serveMux.disablePathLengthFallback = true
+	}
+}
+
+// WithStreamErrorHandler returns a ServeMuxOption that will use the given custom stream
+// error handler, which allows for customizing the error trailer for server-streaming
+// calls.
+//
+// For stream errors that occur before any response has been written, the mux's
+// ProtoErrorHandler will be invoked. However, once data has been written, the errors must
+// be handled differently: they must be included in the response body. The response body's
+// final message will include the error details returned by the stream error handler.
+func WithStreamErrorHandler(fn StreamErrorHandlerFunc) ServeMuxOption {
+	return func(serveMux *ServeMux) {
+		serveMux.streamErrorHandler = fn
+	}
+}
+
+// WithLastMatchWins returns a ServeMuxOption that will enable "last
+// match wins" behavior, where if multiple path patterns match a
+// request path, the last one defined in the .proto file will be used.
+func WithLastMatchWins() ServeMuxOption {
+	return func(serveMux *ServeMux) {
+		serveMux.lastMatchWins = true
+	}
+}
+
+// NewServeMux returns a new ServeMux whose internal mapping is empty.
+func NewServeMux(opts ...ServeMuxOption) *ServeMux {
+	serveMux := &ServeMux{
+		handlers:               make(map[string][]handler),
+		forwardResponseOptions: make([]func(context.Context, http.ResponseWriter, proto.Message) error, 0),
+		marshalers:             makeMarshalerMIMERegistry(),
+		streamErrorHandler:     DefaultHTTPStreamErrorHandler,
+	}
+
+	for _, opt := range opts {
+		opt(serveMux)
+	}
+
+	if serveMux.incomingHeaderMatcher == nil {
+		serveMux.incomingHeaderMatcher = DefaultHeaderMatcher
+	}
+
+	if serveMux.outgoingHeaderMatcher == nil {
+		serveMux.outgoingHeaderMatcher = func(key string) (string, bool) {
+			return fmt.Sprintf("%s%s", MetadataHeaderPrefix, key), true
+		}
+	}
+
+	return serveMux
+}
+
+// Handle associates "h" to the pair of HTTP method and path pattern.
+func (s *ServeMux) Handle(meth string, pat Pattern, h HandlerFunc) {
+	if s.lastMatchWins {
+		s.handlers[meth] = append([]handler{handler{pat: pat, h: h}}, s.handlers[meth]...)
+	} else {
+		s.handlers[meth] = append(s.handlers[meth], handler{pat: pat, h: h})
+	}
+}
+
+// ServeHTTP dispatches the request to the first handler whose pattern matches to r.Method and r.Path.
+func (s *ServeMux) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+	ctx := r.Context()
+
+	path := r.URL.Path
+	if !strings.HasPrefix(path, "/") {
+		if s.protoErrorHandler != nil {
+			_, outboundMarshaler := MarshalerForRequest(s, r)
+			sterr := status.Error(codes.InvalidArgument, http.StatusText(http.StatusBadRequest))
+			s.protoErrorHandler(ctx, s, outboundMarshaler, w, r, sterr)
+		} else {
+			OtherErrorHandler(w, r, http.StatusText(http.StatusBadRequest), http.StatusBadRequest)
+		}
+		return
+	}
+
+	components := strings.Split(path[1:], "/")
+	l := len(components)
+	var verb string
+	if idx := strings.LastIndex(components[l-1], ":"); idx == 0 {
+		if s.protoErrorHandler != nil {
+			_, outboundMarshaler := MarshalerForRequest(s, r)
+			s.protoErrorHandler(ctx, s, outboundMarshaler, w, r, ErrUnknownURI)
+		} else {
+			OtherErrorHandler(w, r, http.StatusText(http.StatusNotFound), http.StatusNotFound)
+		}
+		return
+	} else if idx > 0 {
+		c := components[l-1]
+		components[l-1], verb = c[:idx], c[idx+1:]
+	}
+
+	if override := r.Header.Get("X-HTTP-Method-Override"); override != "" && s.isPathLengthFallback(r) {
+		r.Method = strings.ToUpper(override)
+		if err := r.ParseForm(); err != nil {
+			if s.protoErrorHandler != nil {
+				_, outboundMarshaler := MarshalerForRequest(s, r)
+				sterr := status.Error(codes.InvalidArgument, err.Error())
+				s.protoErrorHandler(ctx, s, outboundMarshaler, w, r, sterr)
+			} else {
+				OtherErrorHandler(w, r, err.Error(), http.StatusBadRequest)
+			}
+			return
+		}
+	}
+	for _, h := range s.handlers[r.Method] {
+		pathParams, err := h.pat.Match(components, verb)
+		if err != nil {
+			continue
+		}
+		h.h(w, r, pathParams)
+		return
+	}
+
+	// lookup other methods to handle fallback from GET to POST and
+	// to determine if it is MethodNotAllowed or NotFound.
+	for m, handlers := range s.handlers {
+		if m == r.Method {
+			continue
+		}
+		for _, h := range handlers {
+			pathParams, err := h.pat.Match(components, verb)
+			if err != nil {
+				continue
+			}
+			// X-HTTP-Method-Override is optional. Always allow fallback to POST.
+			if s.isPathLengthFallback(r) {
+				if err := r.ParseForm(); err != nil {
+					if s.protoErrorHandler != nil {
+						_, outboundMarshaler := MarshalerForRequest(s, r)
+						sterr := status.Error(codes.InvalidArgument, err.Error())
+						s.protoErrorHandler(ctx, s, outboundMarshaler, w, r, sterr)
+					} else {
+						OtherErrorHandler(w, r, err.Error(), http.StatusBadRequest)
+					}
+					return
+				}
+				h.h(w, r, pathParams)
+				return
+			}
+			if s.protoErrorHandler != nil {
+				_, outboundMarshaler := MarshalerForRequest(s, r)
+				s.protoErrorHandler(ctx, s, outboundMarshaler, w, r, ErrUnknownURI)
+			} else {
+				OtherErrorHandler(w, r, http.StatusText(http.StatusMethodNotAllowed), http.StatusMethodNotAllowed)
+			}
+			return
+		}
+	}
+
+	if s.protoErrorHandler != nil {
+		_, outboundMarshaler := MarshalerForRequest(s, r)
+		s.protoErrorHandler(ctx, s, outboundMarshaler, w, r, ErrUnknownURI)
+	} else {
+		OtherErrorHandler(w, r, http.StatusText(http.StatusNotFound), http.StatusNotFound)
+	}
+}
+
+// GetForwardResponseOptions returns the ForwardResponseOptions associated with this ServeMux.
+func (s *ServeMux) GetForwardResponseOptions() []func(context.Context, http.ResponseWriter, proto.Message) error {
+	return s.forwardResponseOptions
+}
+
+func (s *ServeMux) isPathLengthFallback(r *http.Request) bool {
+	return !s.disablePathLengthFallback && r.Method == "POST" && r.Header.Get("Content-Type") == "application/x-www-form-urlencoded"
+}
+
+type handler struct {
+	pat Pattern
+	h   HandlerFunc
+}
diff --git a/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/pattern.go b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/pattern.go
new file mode 100644
index 000000000..09053695d
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/pattern.go
@@ -0,0 +1,262 @@
+package runtime
+
+import (
+	"errors"
+	"fmt"
+	"strings"
+
+	"github.com/grpc-ecosystem/grpc-gateway/utilities"
+	"google.golang.org/grpc/grpclog"
+)
+
+var (
+	// ErrNotMatch indicates that the given HTTP request path does not match to the pattern.
+	ErrNotMatch = errors.New("not match to the path pattern")
+	// ErrInvalidPattern indicates that the given definition of Pattern is not valid.
+	ErrInvalidPattern = errors.New("invalid pattern")
+)
+
+type op struct {
+	code    utilities.OpCode
+	operand int
+}
+
+// Pattern is a template pattern of http request paths defined in github.com/googleapis/googleapis/google/api/http.proto.
+type Pattern struct {
+	// ops is a list of operations
+	ops []op
+	// pool is a constant pool indexed by the operands or vars.
+	pool []string
+	// vars is a list of variables names to be bound by this pattern
+	vars []string
+	// stacksize is the max depth of the stack
+	stacksize int
+	// tailLen is the length of the fixed-size segments after a deep wildcard
+	tailLen int
+	// verb is the VERB part of the path pattern. It is empty if the pattern does not have VERB part.
+	verb string
+	// assumeColonVerb indicates whether a path suffix after a final
+	// colon may only be interpreted as a verb.
+	assumeColonVerb bool
+}
+
+type patternOptions struct {
+	assumeColonVerb bool
+}
+
+// PatternOpt is an option for creating Patterns.
+type PatternOpt func(*patternOptions)
+
+// NewPattern returns a new Pattern from the given definition values.
+// "ops" is a sequence of op codes. "pool" is a constant pool.
+// "verb" is the verb part of the pattern. It is empty if the pattern does not have the part.
+// "version" must be 1 for now.
+// It returns an error if the given definition is invalid.
+func NewPattern(version int, ops []int, pool []string, verb string, opts ...PatternOpt) (Pattern, error) {
+	options := patternOptions{
+		assumeColonVerb: true,
+	}
+	for _, o := range opts {
+		o(&options)
+	}
+
+	if version != 1 {
+		grpclog.Infof("unsupported version: %d", version)
+		return Pattern{}, ErrInvalidPattern
+	}
+
+	l := len(ops)
+	if l%2 != 0 {
+		grpclog.Infof("odd number of ops codes: %d", l)
+		return Pattern{}, ErrInvalidPattern
+	}
+
+	var (
+		typedOps        []op
+		stack, maxstack int
+		tailLen         int
+		pushMSeen       bool
+		vars            []string
+	)
+	for i := 0; i < l; i += 2 {
+		op := op{code: utilities.OpCode(ops[i]), operand: ops[i+1]}
+		switch op.code {
+		case utilities.OpNop:
+			continue
+		case utilities.OpPush:
+			if pushMSeen {
+				tailLen++
+			}
+			stack++
+		case utilities.OpPushM:
+			if pushMSeen {
+				grpclog.Infof("pushM appears twice")
+				return Pattern{}, ErrInvalidPattern
+			}
+			pushMSeen = true
+			stack++
+		case utilities.OpLitPush:
+			if op.operand < 0 || len(pool) <= op.operand {
+				grpclog.Infof("negative literal index: %d", op.operand)
+				return Pattern{}, ErrInvalidPattern
+			}
+			if pushMSeen {
+				tailLen++
+			}
+			stack++
+		case utilities.OpConcatN:
+			if op.operand <= 0 {
+				grpclog.Infof("negative concat size: %d", op.operand)
+				return Pattern{}, ErrInvalidPattern
+			}
+			stack -= op.operand
+			if stack < 0 {
+				grpclog.Print("stack underflow")
+				return Pattern{}, ErrInvalidPattern
+			}
+			stack++
+		case utilities.OpCapture:
+			if op.operand < 0 || len(pool) <= op.operand {
+				grpclog.Infof("variable name index out of bound: %d", op.operand)
+				return Pattern{}, ErrInvalidPattern
+			}
+			v := pool[op.operand]
+			op.operand = len(vars)
+			vars = append(vars, v)
+			stack--
+			if stack < 0 {
+				grpclog.Infof("stack underflow")
+				return Pattern{}, ErrInvalidPattern
+			}
+		default:
+			grpclog.Infof("invalid opcode: %d", op.code)
+			return Pattern{}, ErrInvalidPattern
+		}
+
+		if maxstack < stack {
+			maxstack = stack
+		}
+		typedOps = append(typedOps, op)
+	}
+	return Pattern{
+		ops:             typedOps,
+		pool:            pool,
+		vars:            vars,
+		stacksize:       maxstack,
+		tailLen:         tailLen,
+		verb:            verb,
+		assumeColonVerb: options.assumeColonVerb,
+	}, nil
+}
+
+// MustPattern is a helper function which makes it easier to call NewPattern in variable initialization.
+func MustPattern(p Pattern, err error) Pattern {
+	if err != nil {
+		grpclog.Fatalf("Pattern initialization failed: %v", err)
+	}
+	return p
+}
+
+// Match examines components if it matches to the Pattern.
+// If it matches, the function returns a mapping from field paths to their captured values.
+// If otherwise, the function returns an error.
+func (p Pattern) Match(components []string, verb string) (map[string]string, error) {
+	if p.verb != verb {
+		if p.assumeColonVerb || p.verb != "" {
+			return nil, ErrNotMatch
+		}
+		if len(components) == 0 {
+			components = []string{":" + verb}
+		} else {
+			components = append([]string{}, components...)
+			components[len(components)-1] += ":" + verb
+		}
+		verb = ""
+	}
+
+	var pos int
+	stack := make([]string, 0, p.stacksize)
+	captured := make([]string, len(p.vars))
+	l := len(components)
+	for _, op := range p.ops {
+		switch op.code {
+		case utilities.OpNop:
+			continue
+		case utilities.OpPush, utilities.OpLitPush:
+			if pos >= l {
+				return nil, ErrNotMatch
+			}
+			c := components[pos]
+			if op.code == utilities.OpLitPush {
+				if lit := p.pool[op.operand]; c != lit {
+					return nil, ErrNotMatch
+				}
+			}
+			stack = append(stack, c)
+			pos++
+		case utilities.OpPushM:
+			end := len(components)
+			if end < pos+p.tailLen {
+				return nil, ErrNotMatch
+			}
+			end -= p.tailLen
+			stack = append(stack, strings.Join(components[pos:end], "/"))
+			pos = end
+		case utilities.OpConcatN:
+			n := op.operand
+			l := len(stack) - n
+			stack = append(stack[:l], strings.Join(stack[l:], "/"))
+		case utilities.OpCapture:
+			n := len(stack) - 1
+			captured[op.operand] = stack[n]
+			stack = stack[:n]
+		}
+	}
+	if pos < l {
+		return nil, ErrNotMatch
+	}
+	bindings := make(map[string]string)
+	for i, val := range captured {
+		bindings[p.vars[i]] = val
+	}
+	return bindings, nil
+}
+
+// Verb returns the verb part of the Pattern.
+func (p Pattern) Verb() string { return p.verb }
+
+func (p Pattern) String() string {
+	var stack []string
+	for _, op := range p.ops {
+		switch op.code {
+		case utilities.OpNop:
+			continue
+		case utilities.OpPush:
+			stack = append(stack, "*")
+		case utilities.OpLitPush:
+			stack = append(stack, p.pool[op.operand])
+		case utilities.OpPushM:
+			stack = append(stack, "**")
+		case utilities.OpConcatN:
+			n := op.operand
+			l := len(stack) - n
+			stack = append(stack[:l], strings.Join(stack[l:], "/"))
+		case utilities.OpCapture:
+			n := len(stack) - 1
+			stack[n] = fmt.Sprintf("{%s=%s}", p.vars[op.operand], stack[n])
+		}
+	}
+	segs := strings.Join(stack, "/")
+	if p.verb != "" {
+		return fmt.Sprintf("/%s:%s", segs, p.verb)
+	}
+	return "/" + segs
+}
+
+// AssumeColonVerbOpt indicates whether a path suffix after a final
+// colon may only be interpreted as a verb.
+func AssumeColonVerbOpt(val bool) PatternOpt {
+	return PatternOpt(func(o *patternOptions) {
+		o.assumeColonVerb = val
+	})
+}
diff --git a/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/proto2_convert.go b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/proto2_convert.go
new file mode 100644
index 000000000..a3151e2a5
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/proto2_convert.go
@@ -0,0 +1,80 @@
+package runtime
+
+import (
+	"github.com/golang/protobuf/proto"
+)
+
+// StringP returns a pointer to a string whose pointee is same as the given string value.
+func StringP(val string) (*string, error) {
+	return proto.String(val), nil
+}
+
+// BoolP parses the given string representation of a boolean value,
+// and returns a pointer to a bool whose value is same as the parsed value.
+func BoolP(val string) (*bool, error) {
+	b, err := Bool(val)
+	if err != nil {
+		return nil, err
+	}
+	return proto.Bool(b), nil
+}
+
+// Float64P parses the given string representation of a floating point number,
+// and returns a pointer to a float64 whose value is same as the parsed number.
+func Float64P(val string) (*float64, error) {
+	f, err := Float64(val)
+	if err != nil {
+		return nil, err
+	}
+	return proto.Float64(f), nil
+}
+
+// Float32P parses the given string representation of a floating point number,
+// and returns a pointer to a float32 whose value is same as the parsed number.
+func Float32P(val string) (*float32, error) {
+	f, err := Float32(val)
+	if err != nil {
+		return nil, err
+	}
+	return proto.Float32(f), nil
+}
+
+// Int64P parses the given string representation of an integer
+// and returns a pointer to a int64 whose value is same as the parsed integer.
+func Int64P(val string) (*int64, error) {
+	i, err := Int64(val)
+	if err != nil {
+		return nil, err
+	}
+	return proto.Int64(i), nil
+}
+
+// Int32P parses the given string representation of an integer
+// and returns a pointer to a int32 whose value is same as the parsed integer.
+func Int32P(val string) (*int32, error) {
+	i, err := Int32(val)
+	if err != nil {
+		return nil, err
+	}
+	return proto.Int32(i), err
+}
+
+// Uint64P parses the given string representation of an integer
+// and returns a pointer to a uint64 whose value is same as the parsed integer.
+func Uint64P(val string) (*uint64, error) {
+	i, err := Uint64(val)
+	if err != nil {
+		return nil, err
+	}
+	return proto.Uint64(i), err
+}
+
+// Uint32P parses the given string representation of an integer
+// and returns a pointer to a uint32 whose value is same as the parsed integer.
+func Uint32P(val string) (*uint32, error) {
+	i, err := Uint32(val)
+	if err != nil {
+		return nil, err
+	}
+	return proto.Uint32(i), err
+}
diff --git a/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/proto_errors.go b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/proto_errors.go
new file mode 100644
index 000000000..3fd30da22
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/proto_errors.go
@@ -0,0 +1,106 @@
+package runtime
+
+import (
+	"context"
+	"io"
+	"net/http"
+
+	"github.com/golang/protobuf/ptypes/any"
+	"github.com/grpc-ecosystem/grpc-gateway/internal"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/grpclog"
+	"google.golang.org/grpc/status"
+)
+
+// StreamErrorHandlerFunc accepts an error as a gRPC error generated via status package and translates it into a
+// a proto struct used to represent error at the end of a stream.
+type StreamErrorHandlerFunc func(context.Context, error) *StreamError
+
+// StreamError is the payload for the final message in a server stream in the event that the server returns an
+// error after a response message has already been sent.
+type StreamError internal.StreamError
+
+// ProtoErrorHandlerFunc handles the error as a gRPC error generated via status package and replies to the request.
+type ProtoErrorHandlerFunc func(context.Context, *ServeMux, Marshaler, http.ResponseWriter, *http.Request, error)
+
+var _ ProtoErrorHandlerFunc = DefaultHTTPProtoErrorHandler
+
+// DefaultHTTPProtoErrorHandler is an implementation of HTTPError.
+// If "err" is an error from gRPC system, the function replies with the status code mapped by HTTPStatusFromCode.
+// If otherwise, it replies with http.StatusInternalServerError.
+//
+// The response body returned by this function is a Status message marshaled by a Marshaler.
+//
+// Do not set this function to HTTPError variable directly, use WithProtoErrorHandler option instead.
+func DefaultHTTPProtoErrorHandler(ctx context.Context, mux *ServeMux, marshaler Marshaler, w http.ResponseWriter, _ *http.Request, err error) {
+	// return Internal when Marshal failed
+	const fallback = `{"code": 13, "message": "failed to marshal error message"}`
+
+	s, ok := status.FromError(err)
+	if !ok {
+		s = status.New(codes.Unknown, err.Error())
+	}
+
+	w.Header().Del("Trailer")
+
+	contentType := marshaler.ContentType()
+	// Check marshaler on run time in order to keep backwards compatibility
+	// An interface param needs to be added to the ContentType() function on
+	// the Marshal interface to be able to remove this check
+	if typeMarshaler, ok := marshaler.(contentTypeMarshaler); ok {
+		pb := s.Proto()
+		contentType = typeMarshaler.ContentTypeFromMessage(pb)
+	}
+	w.Header().Set("Content-Type", contentType)
+
+	buf, merr := marshaler.Marshal(s.Proto())
+	if merr != nil {
+		grpclog.Infof("Failed to marshal error message %q: %v", s.Proto(), merr)
+		w.WriteHeader(http.StatusInternalServerError)
+		if _, err := io.WriteString(w, fallback); err != nil {
+			grpclog.Infof("Failed to write response: %v", err)
+		}
+		return
+	}
+
+	md, ok := ServerMetadataFromContext(ctx)
+	if !ok {
+		grpclog.Infof("Failed to extract ServerMetadata from context")
+	}
+
+	handleForwardResponseServerMetadata(w, mux, md)
+	handleForwardResponseTrailerHeader(w, md)
+	st := HTTPStatusFromCode(s.Code())
+	w.WriteHeader(st)
+	if _, err := w.Write(buf); err != nil {
+		grpclog.Infof("Failed to write response: %v", err)
+	}
+
+	handleForwardResponseTrailer(w, md)
+}
+
+// DefaultHTTPStreamErrorHandler converts the given err into a *StreamError via
+// default logic.
+//
+// It extracts the gRPC status from err if possible. The fields of the status are
+// used to populate the returned StreamError, and the HTTP status code is derived
+// from the gRPC code via HTTPStatusFromCode. If the given err does not contain a
+// gRPC status, an "Unknown" gRPC code is used and "Internal Server Error" HTTP code.
+func DefaultHTTPStreamErrorHandler(_ context.Context, err error) *StreamError {
+	grpcCode := codes.Unknown
+	grpcMessage := err.Error()
+	var grpcDetails []*any.Any
+	if s, ok := status.FromError(err); ok {
+		grpcCode = s.Code()
+		grpcMessage = s.Message()
+		grpcDetails = s.Proto().GetDetails()
+	}
+	httpCode := HTTPStatusFromCode(grpcCode)
+	return &StreamError{
+		GrpcCode:   int32(grpcCode),
+		HttpCode:   int32(httpCode),
+		Message:    grpcMessage,
+		HttpStatus: http.StatusText(httpCode),
+		Details:    grpcDetails,
+	}
+}
diff --git a/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/query.go b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/query.go
new file mode 100644
index 000000000..ba66842c3
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/query.go
@@ -0,0 +1,406 @@
+package runtime
+
+import (
+	"encoding/base64"
+	"fmt"
+	"net/url"
+	"reflect"
+	"regexp"
+	"strconv"
+	"strings"
+	"time"
+
+	"github.com/golang/protobuf/proto"
+	"github.com/grpc-ecosystem/grpc-gateway/utilities"
+	"google.golang.org/grpc/grpclog"
+)
+
+var valuesKeyRegexp = regexp.MustCompile("^(.*)\\[(.*)\\]$")
+
+var currentQueryParser QueryParameterParser = &defaultQueryParser{}
+
+// QueryParameterParser defines interface for all query parameter parsers
+type QueryParameterParser interface {
+	Parse(msg proto.Message, values url.Values, filter *utilities.DoubleArray) error
+}
+
+// PopulateQueryParameters parses query parameters
+// into "msg" using current query parser
+func PopulateQueryParameters(msg proto.Message, values url.Values, filter *utilities.DoubleArray) error {
+	return currentQueryParser.Parse(msg, values, filter)
+}
+
+type defaultQueryParser struct{}
+
+// Parse populates "values" into "msg".
+// A value is ignored if its key starts with one of the elements in "filter".
+func (*defaultQueryParser) Parse(msg proto.Message, values url.Values, filter *utilities.DoubleArray) error {
+	for key, values := range values {
+		match := valuesKeyRegexp.FindStringSubmatch(key)
+		if len(match) == 3 {
+			key = match[1]
+			values = append([]string{match[2]}, values...)
+		}
+		fieldPath := strings.Split(key, ".")
+		if filter.HasCommonPrefix(fieldPath) {
+			continue
+		}
+		if err := populateFieldValueFromPath(msg, fieldPath, values); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// PopulateFieldFromPath sets a value in a nested Protobuf structure.
+// It instantiates missing protobuf fields as it goes.
+func PopulateFieldFromPath(msg proto.Message, fieldPathString string, value string) error {
+	fieldPath := strings.Split(fieldPathString, ".")
+	return populateFieldValueFromPath(msg, fieldPath, []string{value})
+}
+
+func populateFieldValueFromPath(msg proto.Message, fieldPath []string, values []string) error {
+	m := reflect.ValueOf(msg)
+	if m.Kind() != reflect.Ptr {
+		return fmt.Errorf("unexpected type %T: %v", msg, msg)
+	}
+	var props *proto.Properties
+	m = m.Elem()
+	for i, fieldName := range fieldPath {
+		isLast := i == len(fieldPath)-1
+		if !isLast && m.Kind() != reflect.Struct {
+			return fmt.Errorf("non-aggregate type in the mid of path: %s", strings.Join(fieldPath, "."))
+		}
+		var f reflect.Value
+		var err error
+		f, props, err = fieldByProtoName(m, fieldName)
+		if err != nil {
+			return err
+		} else if !f.IsValid() {
+			grpclog.Infof("field not found in %T: %s", msg, strings.Join(fieldPath, "."))
+			return nil
+		}
+
+		switch f.Kind() {
+		case reflect.Bool, reflect.Float32, reflect.Float64, reflect.Int32, reflect.Int64, reflect.String, reflect.Uint32, reflect.Uint64:
+			if !isLast {
+				return fmt.Errorf("unexpected nested field %s in %s", fieldPath[i+1], strings.Join(fieldPath[:i+1], "."))
+			}
+			m = f
+		case reflect.Slice:
+			if !isLast {
+				return fmt.Errorf("unexpected repeated field in %s", strings.Join(fieldPath, "."))
+			}
+			// Handle []byte
+			if f.Type().Elem().Kind() == reflect.Uint8 {
+				m = f
+				break
+			}
+			return populateRepeatedField(f, values, props)
+		case reflect.Ptr:
+			if f.IsNil() {
+				m = reflect.New(f.Type().Elem())
+				f.Set(m.Convert(f.Type()))
+			}
+			m = f.Elem()
+			continue
+		case reflect.Struct:
+			m = f
+			continue
+		case reflect.Map:
+			if !isLast {
+				return fmt.Errorf("unexpected nested field %s in %s", fieldPath[i+1], strings.Join(fieldPath[:i+1], "."))
+			}
+			return populateMapField(f, values, props)
+		default:
+			return fmt.Errorf("unexpected type %s in %T", f.Type(), msg)
+		}
+	}
+	switch len(values) {
+	case 0:
+		return fmt.Errorf("no value of field: %s", strings.Join(fieldPath, "."))
+	case 1:
+	default:
+		grpclog.Infof("too many field values: %s", strings.Join(fieldPath, "."))
+	}
+	return populateField(m, values[0], props)
+}
+
+// fieldByProtoName looks up a field whose corresponding protobuf field name is "name".
+// "m" must be a struct value. It returns zero reflect.Value if no such field found.
+func fieldByProtoName(m reflect.Value, name string) (reflect.Value, *proto.Properties, error) {
+	props := proto.GetProperties(m.Type())
+
+	// look up field name in oneof map
+	for _, op := range props.OneofTypes {
+		if name == op.Prop.OrigName || name == op.Prop.JSONName {
+			v := reflect.New(op.Type.Elem())
+			field := m.Field(op.Field)
+			if !field.IsNil() {
+				return reflect.Value{}, nil, fmt.Errorf("field already set for %s oneof", props.Prop[op.Field].OrigName)
+			}
+			field.Set(v)
+			return v.Elem().Field(0), op.Prop, nil
+		}
+	}
+
+	for _, p := range props.Prop {
+		if p.OrigName == name {
+			return m.FieldByName(p.Name), p, nil
+		}
+		if p.JSONName == name {
+			return m.FieldByName(p.Name), p, nil
+		}
+	}
+	return reflect.Value{}, nil, nil
+}
+
+func populateMapField(f reflect.Value, values []string, props *proto.Properties) error {
+	if len(values) != 2 {
+		return fmt.Errorf("more than one value provided for key %s in map %s", values[0], props.Name)
+	}
+
+	key, value := values[0], values[1]
+	keyType := f.Type().Key()
+	valueType := f.Type().Elem()
+	if f.IsNil() {
+		f.Set(reflect.MakeMap(f.Type()))
+	}
+
+	keyConv, ok := convFromType[keyType.Kind()]
+	if !ok {
+		return fmt.Errorf("unsupported key type %s in map %s", keyType, props.Name)
+	}
+	valueConv, ok := convFromType[valueType.Kind()]
+	if !ok {
+		return fmt.Errorf("unsupported value type %s in map %s", valueType, props.Name)
+	}
+
+	keyV := keyConv.Call([]reflect.Value{reflect.ValueOf(key)})
+	if err := keyV[1].Interface(); err != nil {
+		return err.(error)
+	}
+	valueV := valueConv.Call([]reflect.Value{reflect.ValueOf(value)})
+	if err := valueV[1].Interface(); err != nil {
+		return err.(error)
+	}
+
+	f.SetMapIndex(keyV[0].Convert(keyType), valueV[0].Convert(valueType))
+
+	return nil
+}
+
+func populateRepeatedField(f reflect.Value, values []string, props *proto.Properties) error {
+	elemType := f.Type().Elem()
+
+	// is the destination field a slice of an enumeration type?
+	if enumValMap := proto.EnumValueMap(props.Enum); enumValMap != nil {
+		return populateFieldEnumRepeated(f, values, enumValMap)
+	}
+
+	conv, ok := convFromType[elemType.Kind()]
+	if !ok {
+		return fmt.Errorf("unsupported field type %s", elemType)
+	}
+	f.Set(reflect.MakeSlice(f.Type(), len(values), len(values)).Convert(f.Type()))
+	for i, v := range values {
+		result := conv.Call([]reflect.Value{reflect.ValueOf(v)})
+		if err := result[1].Interface(); err != nil {
+			return err.(error)
+		}
+		f.Index(i).Set(result[0].Convert(f.Index(i).Type()))
+	}
+	return nil
+}
+
+func populateField(f reflect.Value, value string, props *proto.Properties) error {
+	i := f.Addr().Interface()
+
+	// Handle protobuf well known types
+	var name string
+	switch m := i.(type) {
+	case interface{ XXX_WellKnownType() string }:
+		name = m.XXX_WellKnownType()
+	case proto.Message:
+		const wktPrefix = "google.protobuf."
+		if fullName := proto.MessageName(m); strings.HasPrefix(fullName, wktPrefix) {
+			name = fullName[len(wktPrefix):]
+		}
+	}
+	switch name {
+	case "Timestamp":
+		if value == "null" {
+			f.FieldByName("Seconds").SetInt(0)
+			f.FieldByName("Nanos").SetInt(0)
+			return nil
+		}
+
+		t, err := time.Parse(time.RFC3339Nano, value)
+		if err != nil {
+			return fmt.Errorf("bad Timestamp: %v", err)
+		}
+		f.FieldByName("Seconds").SetInt(int64(t.Unix()))
+		f.FieldByName("Nanos").SetInt(int64(t.Nanosecond()))
+		return nil
+	case "Duration":
+		if value == "null" {
+			f.FieldByName("Seconds").SetInt(0)
+			f.FieldByName("Nanos").SetInt(0)
+			return nil
+		}
+		d, err := time.ParseDuration(value)
+		if err != nil {
+			return fmt.Errorf("bad Duration: %v", err)
+		}
+
+		ns := d.Nanoseconds()
+		s := ns / 1e9
+		ns %= 1e9
+		f.FieldByName("Seconds").SetInt(s)
+		f.FieldByName("Nanos").SetInt(ns)
+		return nil
+	case "DoubleValue":
+		fallthrough
+	case "FloatValue":
+		float64Val, err := strconv.ParseFloat(value, 64)
+		if err != nil {
+			return fmt.Errorf("bad DoubleValue: %s", value)
+		}
+		f.FieldByName("Value").SetFloat(float64Val)
+		return nil
+	case "Int64Value":
+		fallthrough
+	case "Int32Value":
+		int64Val, err := strconv.ParseInt(value, 10, 64)
+		if err != nil {
+			return fmt.Errorf("bad DoubleValue: %s", value)
+		}
+		f.FieldByName("Value").SetInt(int64Val)
+		return nil
+	case "UInt64Value":
+		fallthrough
+	case "UInt32Value":
+		uint64Val, err := strconv.ParseUint(value, 10, 64)
+		if err != nil {
+			return fmt.Errorf("bad DoubleValue: %s", value)
+		}
+		f.FieldByName("Value").SetUint(uint64Val)
+		return nil
+	case "BoolValue":
+		if value == "true" {
+			f.FieldByName("Value").SetBool(true)
+		} else if value == "false" {
+			f.FieldByName("Value").SetBool(false)
+		} else {
+			return fmt.Errorf("bad BoolValue: %s", value)
+		}
+		return nil
+	case "StringValue":
+		f.FieldByName("Value").SetString(value)
+		return nil
+	case "BytesValue":
+		bytesVal, err := base64.StdEncoding.DecodeString(value)
+		if err != nil {
+			return fmt.Errorf("bad BytesValue: %s", value)
+		}
+		f.FieldByName("Value").SetBytes(bytesVal)
+		return nil
+	case "FieldMask":
+		p := f.FieldByName("Paths")
+		for _, v := range strings.Split(value, ",") {
+			if v != "" {
+				p.Set(reflect.Append(p, reflect.ValueOf(v)))
+			}
+		}
+		return nil
+	}
+
+	// Handle Time and Duration stdlib types
+	switch t := i.(type) {
+	case *time.Time:
+		pt, err := time.Parse(time.RFC3339Nano, value)
+		if err != nil {
+			return fmt.Errorf("bad Timestamp: %v", err)
+		}
+		*t = pt
+		return nil
+	case *time.Duration:
+		d, err := time.ParseDuration(value)
+		if err != nil {
+			return fmt.Errorf("bad Duration: %v", err)
+		}
+		*t = d
+		return nil
+	}
+
+	// is the destination field an enumeration type?
+	if enumValMap := proto.EnumValueMap(props.Enum); enumValMap != nil {
+		return populateFieldEnum(f, value, enumValMap)
+	}
+
+	conv, ok := convFromType[f.Kind()]
+	if !ok {
+		return fmt.Errorf("field type %T is not supported in query parameters", i)
+	}
+	result := conv.Call([]reflect.Value{reflect.ValueOf(value)})
+	if err := result[1].Interface(); err != nil {
+		return err.(error)
+	}
+	f.Set(result[0].Convert(f.Type()))
+	return nil
+}
+
+func convertEnum(value string, t reflect.Type, enumValMap map[string]int32) (reflect.Value, error) {
+	// see if it's an enumeration string
+	if enumVal, ok := enumValMap[value]; ok {
+		return reflect.ValueOf(enumVal).Convert(t), nil
+	}
+
+	// check for an integer that matches an enumeration value
+	eVal, err := strconv.Atoi(value)
+	if err != nil {
+		return reflect.Value{}, fmt.Errorf("%s is not a valid %s", value, t)
+	}
+	for _, v := range enumValMap {
+		if v == int32(eVal) {
+			return reflect.ValueOf(eVal).Convert(t), nil
+		}
+	}
+	return reflect.Value{}, fmt.Errorf("%s is not a valid %s", value, t)
+}
+
+func populateFieldEnum(f reflect.Value, value string, enumValMap map[string]int32) error {
+	cval, err := convertEnum(value, f.Type(), enumValMap)
+	if err != nil {
+		return err
+	}
+	f.Set(cval)
+	return nil
+}
+
+func populateFieldEnumRepeated(f reflect.Value, values []string, enumValMap map[string]int32) error {
+	elemType := f.Type().Elem()
+	f.Set(reflect.MakeSlice(f.Type(), len(values), len(values)).Convert(f.Type()))
+	for i, v := range values {
+		result, err := convertEnum(v, elemType, enumValMap)
+		if err != nil {
+			return err
+		}
+		f.Index(i).Set(result)
+	}
+	return nil
+}
+
+var (
+	convFromType = map[reflect.Kind]reflect.Value{
+		reflect.String:  reflect.ValueOf(String),
+		reflect.Bool:    reflect.ValueOf(Bool),
+		reflect.Float64: reflect.ValueOf(Float64),
+		reflect.Float32: reflect.ValueOf(Float32),
+		reflect.Int64:   reflect.ValueOf(Int64),
+		reflect.Int32:   reflect.ValueOf(Int32),
+		reflect.Uint64:  reflect.ValueOf(Uint64),
+		reflect.Uint32:  reflect.ValueOf(Uint32),
+		reflect.Slice:   reflect.ValueOf(Bytes),
+	}
+)
diff --git a/vendor/github.com/grpc-ecosystem/grpc-gateway/utilities/BUILD.bazel b/vendor/github.com/grpc-ecosystem/grpc-gateway/utilities/BUILD.bazel
new file mode 100644
index 000000000..7109d7932
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/grpc-gateway/utilities/BUILD.bazel
@@ -0,0 +1,21 @@
+load("@io_bazel_rules_go//go:def.bzl", "go_library", "go_test")
+
+package(default_visibility = ["//visibility:public"])
+
+go_library(
+    name = "go_default_library",
+    srcs = [
+        "doc.go",
+        "pattern.go",
+        "readerfactory.go",
+        "trie.go",
+    ],
+    importpath = "github.com/grpc-ecosystem/grpc-gateway/utilities",
+)
+
+go_test(
+    name = "go_default_test",
+    size = "small",
+    srcs = ["trie_test.go"],
+    embed = [":go_default_library"],
+)
diff --git a/vendor/github.com/grpc-ecosystem/grpc-gateway/utilities/doc.go b/vendor/github.com/grpc-ecosystem/grpc-gateway/utilities/doc.go
new file mode 100644
index 000000000..cf79a4d58
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/grpc-gateway/utilities/doc.go
@@ -0,0 +1,2 @@
+// Package utilities provides members for internal use in grpc-gateway.
+package utilities
diff --git a/vendor/github.com/grpc-ecosystem/grpc-gateway/utilities/pattern.go b/vendor/github.com/grpc-ecosystem/grpc-gateway/utilities/pattern.go
new file mode 100644
index 000000000..dfe7de486
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/grpc-gateway/utilities/pattern.go
@@ -0,0 +1,22 @@
+package utilities
+
+// An OpCode is a opcode of compiled path patterns.
+type OpCode int
+
+// These constants are the valid values of OpCode.
+const (
+	// OpNop does nothing
+	OpNop = OpCode(iota)
+	// OpPush pushes a component to stack
+	OpPush
+	// OpLitPush pushes a component to stack if it matches to the literal
+	OpLitPush
+	// OpPushM concatenates the remaining components and pushes it to stack
+	OpPushM
+	// OpConcatN pops N items from stack, concatenates them and pushes it back to stack
+	OpConcatN
+	// OpCapture pops an item and binds it to the variable
+	OpCapture
+	// OpEnd is the least positive invalid opcode.
+	OpEnd
+)
diff --git a/vendor/github.com/grpc-ecosystem/grpc-gateway/utilities/readerfactory.go b/vendor/github.com/grpc-ecosystem/grpc-gateway/utilities/readerfactory.go
new file mode 100644
index 000000000..6dd385466
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/grpc-gateway/utilities/readerfactory.go
@@ -0,0 +1,20 @@
+package utilities
+
+import (
+	"bytes"
+	"io"
+	"io/ioutil"
+)
+
+// IOReaderFactory takes in an io.Reader and returns a function that will allow you to create a new reader that begins
+// at the start of the stream
+func IOReaderFactory(r io.Reader) (func() io.Reader, error) {
+	b, err := ioutil.ReadAll(r)
+	if err != nil {
+		return nil, err
+	}
+
+	return func() io.Reader {
+		return bytes.NewReader(b)
+	}, nil
+}
diff --git a/vendor/github.com/grpc-ecosystem/grpc-gateway/utilities/trie.go b/vendor/github.com/grpc-ecosystem/grpc-gateway/utilities/trie.go
new file mode 100644
index 000000000..c2b7b30dd
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/grpc-gateway/utilities/trie.go
@@ -0,0 +1,177 @@
+package utilities
+
+import (
+	"sort"
+)
+
+// DoubleArray is a Double Array implementation of trie on sequences of strings.
+type DoubleArray struct {
+	// Encoding keeps an encoding from string to int
+	Encoding map[string]int
+	// Base is the base array of Double Array
+	Base []int
+	// Check is the check array of Double Array
+	Check []int
+}
+
+// NewDoubleArray builds a DoubleArray from a set of sequences of strings.
+func NewDoubleArray(seqs [][]string) *DoubleArray {
+	da := &DoubleArray{Encoding: make(map[string]int)}
+	if len(seqs) == 0 {
+		return da
+	}
+
+	encoded := registerTokens(da, seqs)
+	sort.Sort(byLex(encoded))
+
+	root := node{row: -1, col: -1, left: 0, right: len(encoded)}
+	addSeqs(da, encoded, 0, root)
+
+	for i := len(da.Base); i > 0; i-- {
+		if da.Check[i-1] != 0 {
+			da.Base = da.Base[:i]
+			da.Check = da.Check[:i]
+			break
+		}
+	}
+	return da
+}
+
+func registerTokens(da *DoubleArray, seqs [][]string) [][]int {
+	var result [][]int
+	for _, seq := range seqs {
+		var encoded []int
+		for _, token := range seq {
+			if _, ok := da.Encoding[token]; !ok {
+				da.Encoding[token] = len(da.Encoding)
+			}
+			encoded = append(encoded, da.Encoding[token])
+		}
+		result = append(result, encoded)
+	}
+	for i := range result {
+		result[i] = append(result[i], len(da.Encoding))
+	}
+	return result
+}
+
+type node struct {
+	row, col    int
+	left, right int
+}
+
+func (n node) value(seqs [][]int) int {
+	return seqs[n.row][n.col]
+}
+
+func (n node) children(seqs [][]int) []*node {
+	var result []*node
+	lastVal := int(-1)
+	last := new(node)
+	for i := n.left; i < n.right; i++ {
+		if lastVal == seqs[i][n.col+1] {
+			continue
+		}
+		last.right = i
+		last = &node{
+			row:  i,
+			col:  n.col + 1,
+			left: i,
+		}
+		result = append(result, last)
+	}
+	last.right = n.right
+	return result
+}
+
+func addSeqs(da *DoubleArray, seqs [][]int, pos int, n node) {
+	ensureSize(da, pos)
+
+	children := n.children(seqs)
+	var i int
+	for i = 1; ; i++ {
+		ok := func() bool {
+			for _, child := range children {
+				code := child.value(seqs)
+				j := i + code
+				ensureSize(da, j)
+				if da.Check[j] != 0 {
+					return false
+				}
+			}
+			return true
+		}()
+		if ok {
+			break
+		}
+	}
+	da.Base[pos] = i
+	for _, child := range children {
+		code := child.value(seqs)
+		j := i + code
+		da.Check[j] = pos + 1
+	}
+	terminator := len(da.Encoding)
+	for _, child := range children {
+		code := child.value(seqs)
+		if code == terminator {
+			continue
+		}
+		j := i + code
+		addSeqs(da, seqs, j, *child)
+	}
+}
+
+func ensureSize(da *DoubleArray, i int) {
+	for i >= len(da.Base) {
+		da.Base = append(da.Base, make([]int, len(da.Base)+1)...)
+		da.Check = append(da.Check, make([]int, len(da.Check)+1)...)
+	}
+}
+
+type byLex [][]int
+
+func (l byLex) Len() int      { return len(l) }
+func (l byLex) Swap(i, j int) { l[i], l[j] = l[j], l[i] }
+func (l byLex) Less(i, j int) bool {
+	si := l[i]
+	sj := l[j]
+	var k int
+	for k = 0; k < len(si) && k < len(sj); k++ {
+		if si[k] < sj[k] {
+			return true
+		}
+		if si[k] > sj[k] {
+			return false
+		}
+	}
+	if k < len(sj) {
+		return true
+	}
+	return false
+}
+
+// HasCommonPrefix determines if any sequence in the DoubleArray is a prefix of the given sequence.
+func (da *DoubleArray) HasCommonPrefix(seq []string) bool {
+	if len(da.Base) == 0 {
+		return false
+	}
+
+	var i int
+	for _, t := range seq {
+		code, ok := da.Encoding[t]
+		if !ok {
+			break
+		}
+		j := da.Base[i] + code
+		if len(da.Check) <= j || da.Check[j] != i+1 {
+			break
+		}
+		i = j
+	}
+	j := da.Base[i] + len(da.Encoding)
+	if len(da.Check) <= j || da.Check[j] != i+1 {
+		return false
+	}
+	return true
+}
diff --git a/vendor/github.com/stretchr/testify/assert/assertion_compare.go b/vendor/github.com/stretchr/testify/assert/assertion_compare.go
index dc200395c..41649d267 100644
--- a/vendor/github.com/stretchr/testify/assert/assertion_compare.go
+++ b/vendor/github.com/stretchr/testify/assert/assertion_compare.go
@@ -13,12 +13,42 @@ const (
 	compareGreater
 )
 
+var (
+	intType   = reflect.TypeOf(int(1))
+	int8Type  = reflect.TypeOf(int8(1))
+	int16Type = reflect.TypeOf(int16(1))
+	int32Type = reflect.TypeOf(int32(1))
+	int64Type = reflect.TypeOf(int64(1))
+
+	uintType   = reflect.TypeOf(uint(1))
+	uint8Type  = reflect.TypeOf(uint8(1))
+	uint16Type = reflect.TypeOf(uint16(1))
+	uint32Type = reflect.TypeOf(uint32(1))
+	uint64Type = reflect.TypeOf(uint64(1))
+
+	float32Type = reflect.TypeOf(float32(1))
+	float64Type = reflect.TypeOf(float64(1))
+
+	stringType = reflect.TypeOf("")
+)
+
 func compare(obj1, obj2 interface{}, kind reflect.Kind) (CompareType, bool) {
+	obj1Value := reflect.ValueOf(obj1)
+	obj2Value := reflect.ValueOf(obj2)
+
+	// throughout this switch we try and avoid calling .Convert() if possible,
+	// as this has a pretty big performance impact
 	switch kind {
 	case reflect.Int:
 		{
-			intobj1 := obj1.(int)
-			intobj2 := obj2.(int)
+			intobj1, ok := obj1.(int)
+			if !ok {
+				intobj1 = obj1Value.Convert(intType).Interface().(int)
+			}
+			intobj2, ok := obj2.(int)
+			if !ok {
+				intobj2 = obj2Value.Convert(intType).Interface().(int)
+			}
 			if intobj1 > intobj2 {
 				return compareGreater, true
 			}
@@ -31,8 +61,14 @@ func compare(obj1, obj2 interface{}, kind reflect.Kind) (CompareType, bool) {
 		}
 	case reflect.Int8:
 		{
-			int8obj1 := obj1.(int8)
-			int8obj2 := obj2.(int8)
+			int8obj1, ok := obj1.(int8)
+			if !ok {
+				int8obj1 = obj1Value.Convert(int8Type).Interface().(int8)
+			}
+			int8obj2, ok := obj2.(int8)
+			if !ok {
+				int8obj2 = obj2Value.Convert(int8Type).Interface().(int8)
+			}
 			if int8obj1 > int8obj2 {
 				return compareGreater, true
 			}
@@ -45,8 +81,14 @@ func compare(obj1, obj2 interface{}, kind reflect.Kind) (CompareType, bool) {
 		}
 	case reflect.Int16:
 		{
-			int16obj1 := obj1.(int16)
-			int16obj2 := obj2.(int16)
+			int16obj1, ok := obj1.(int16)
+			if !ok {
+				int16obj1 = obj1Value.Convert(int16Type).Interface().(int16)
+			}
+			int16obj2, ok := obj2.(int16)
+			if !ok {
+				int16obj2 = obj2Value.Convert(int16Type).Interface().(int16)
+			}
 			if int16obj1 > int16obj2 {
 				return compareGreater, true
 			}
@@ -59,8 +101,14 @@ func compare(obj1, obj2 interface{}, kind reflect.Kind) (CompareType, bool) {
 		}
 	case reflect.Int32:
 		{
-			int32obj1 := obj1.(int32)
-			int32obj2 := obj2.(int32)
+			int32obj1, ok := obj1.(int32)
+			if !ok {
+				int32obj1 = obj1Value.Convert(int32Type).Interface().(int32)
+			}
+			int32obj2, ok := obj2.(int32)
+			if !ok {
+				int32obj2 = obj2Value.Convert(int32Type).Interface().(int32)
+			}
 			if int32obj1 > int32obj2 {
 				return compareGreater, true
 			}
@@ -73,8 +121,14 @@ func compare(obj1, obj2 interface{}, kind reflect.Kind) (CompareType, bool) {
 		}
 	case reflect.Int64:
 		{
-			int64obj1 := obj1.(int64)
-			int64obj2 := obj2.(int64)
+			int64obj1, ok := obj1.(int64)
+			if !ok {
+				int64obj1 = obj1Value.Convert(int64Type).Interface().(int64)
+			}
+			int64obj2, ok := obj2.(int64)
+			if !ok {
+				int64obj2 = obj2Value.Convert(int64Type).Interface().(int64)
+			}
 			if int64obj1 > int64obj2 {
 				return compareGreater, true
 			}
@@ -87,8 +141,14 @@ func compare(obj1, obj2 interface{}, kind reflect.Kind) (CompareType, bool) {
 		}
 	case reflect.Uint:
 		{
-			uintobj1 := obj1.(uint)
-			uintobj2 := obj2.(uint)
+			uintobj1, ok := obj1.(uint)
+			if !ok {
+				uintobj1 = obj1Value.Convert(uintType).Interface().(uint)
+			}
+			uintobj2, ok := obj2.(uint)
+			if !ok {
+				uintobj2 = obj2Value.Convert(uintType).Interface().(uint)
+			}
 			if uintobj1 > uintobj2 {
 				return compareGreater, true
 			}
@@ -101,8 +161,14 @@ func compare(obj1, obj2 interface{}, kind reflect.Kind) (CompareType, bool) {
 		}
 	case reflect.Uint8:
 		{
-			uint8obj1 := obj1.(uint8)
-			uint8obj2 := obj2.(uint8)
+			uint8obj1, ok := obj1.(uint8)
+			if !ok {
+				uint8obj1 = obj1Value.Convert(uint8Type).Interface().(uint8)
+			}
+			uint8obj2, ok := obj2.(uint8)
+			if !ok {
+				uint8obj2 = obj2Value.Convert(uint8Type).Interface().(uint8)
+			}
 			if uint8obj1 > uint8obj2 {
 				return compareGreater, true
 			}
@@ -115,8 +181,14 @@ func compare(obj1, obj2 interface{}, kind reflect.Kind) (CompareType, bool) {
 		}
 	case reflect.Uint16:
 		{
-			uint16obj1 := obj1.(uint16)
-			uint16obj2 := obj2.(uint16)
+			uint16obj1, ok := obj1.(uint16)
+			if !ok {
+				uint16obj1 = obj1Value.Convert(uint16Type).Interface().(uint16)
+			}
+			uint16obj2, ok := obj2.(uint16)
+			if !ok {
+				uint16obj2 = obj2Value.Convert(uint16Type).Interface().(uint16)
+			}
 			if uint16obj1 > uint16obj2 {
 				return compareGreater, true
 			}
@@ -129,8 +201,14 @@ func compare(obj1, obj2 interface{}, kind reflect.Kind) (CompareType, bool) {
 		}
 	case reflect.Uint32:
 		{
-			uint32obj1 := obj1.(uint32)
-			uint32obj2 := obj2.(uint32)
+			uint32obj1, ok := obj1.(uint32)
+			if !ok {
+				uint32obj1 = obj1Value.Convert(uint32Type).Interface().(uint32)
+			}
+			uint32obj2, ok := obj2.(uint32)
+			if !ok {
+				uint32obj2 = obj2Value.Convert(uint32Type).Interface().(uint32)
+			}
 			if uint32obj1 > uint32obj2 {
 				return compareGreater, true
 			}
@@ -143,8 +221,14 @@ func compare(obj1, obj2 interface{}, kind reflect.Kind) (CompareType, bool) {
 		}
 	case reflect.Uint64:
 		{
-			uint64obj1 := obj1.(uint64)
-			uint64obj2 := obj2.(uint64)
+			uint64obj1, ok := obj1.(uint64)
+			if !ok {
+				uint64obj1 = obj1Value.Convert(uint64Type).Interface().(uint64)
+			}
+			uint64obj2, ok := obj2.(uint64)
+			if !ok {
+				uint64obj2 = obj2Value.Convert(uint64Type).Interface().(uint64)
+			}
 			if uint64obj1 > uint64obj2 {
 				return compareGreater, true
 			}
@@ -157,8 +241,14 @@ func compare(obj1, obj2 interface{}, kind reflect.Kind) (CompareType, bool) {
 		}
 	case reflect.Float32:
 		{
-			float32obj1 := obj1.(float32)
-			float32obj2 := obj2.(float32)
+			float32obj1, ok := obj1.(float32)
+			if !ok {
+				float32obj1 = obj1Value.Convert(float32Type).Interface().(float32)
+			}
+			float32obj2, ok := obj2.(float32)
+			if !ok {
+				float32obj2 = obj2Value.Convert(float32Type).Interface().(float32)
+			}
 			if float32obj1 > float32obj2 {
 				return compareGreater, true
 			}
@@ -171,8 +261,14 @@ func compare(obj1, obj2 interface{}, kind reflect.Kind) (CompareType, bool) {
 		}
 	case reflect.Float64:
 		{
-			float64obj1 := obj1.(float64)
-			float64obj2 := obj2.(float64)
+			float64obj1, ok := obj1.(float64)
+			if !ok {
+				float64obj1 = obj1Value.Convert(float64Type).Interface().(float64)
+			}
+			float64obj2, ok := obj2.(float64)
+			if !ok {
+				float64obj2 = obj2Value.Convert(float64Type).Interface().(float64)
+			}
 			if float64obj1 > float64obj2 {
 				return compareGreater, true
 			}
@@ -185,8 +281,14 @@ func compare(obj1, obj2 interface{}, kind reflect.Kind) (CompareType, bool) {
 		}
 	case reflect.String:
 		{
-			stringobj1 := obj1.(string)
-			stringobj2 := obj2.(string)
+			stringobj1, ok := obj1.(string)
+			if !ok {
+				stringobj1 = obj1Value.Convert(stringType).Interface().(string)
+			}
+			stringobj2, ok := obj2.(string)
+			if !ok {
+				stringobj2 = obj2Value.Convert(stringType).Interface().(string)
+			}
 			if stringobj1 > stringobj2 {
 				return compareGreater, true
 			}
@@ -240,6 +342,24 @@ func LessOrEqual(t TestingT, e1 interface{}, e2 interface{}, msgAndArgs ...inter
 	return compareTwoValues(t, e1, e2, []CompareType{compareLess, compareEqual}, "\"%v\" is not less than or equal to \"%v\"", msgAndArgs)
 }
 
+// Positive asserts that the specified element is positive
+//
+//    assert.Positive(t, 1)
+//    assert.Positive(t, 1.23)
+func Positive(t TestingT, e interface{}, msgAndArgs ...interface{}) bool {
+	zero := reflect.Zero(reflect.TypeOf(e))
+	return compareTwoValues(t, e, zero.Interface(), []CompareType{compareGreater}, "\"%v\" is not positive", msgAndArgs)
+}
+
+// Negative asserts that the specified element is negative
+//
+//    assert.Negative(t, -1)
+//    assert.Negative(t, -1.23)
+func Negative(t TestingT, e interface{}, msgAndArgs ...interface{}) bool {
+	zero := reflect.Zero(reflect.TypeOf(e))
+	return compareTwoValues(t, e, zero.Interface(), []CompareType{compareLess}, "\"%v\" is not negative", msgAndArgs)
+}
+
 func compareTwoValues(t TestingT, e1 interface{}, e2 interface{}, allowedComparesResults []CompareType, failMessage string, msgAndArgs ...interface{}) bool {
 	if h, ok := t.(tHelper); ok {
 		h.Helper()
diff --git a/vendor/github.com/stretchr/testify/assert/assertion_format.go b/vendor/github.com/stretchr/testify/assert/assertion_format.go
index 49370eb16..4dfd1229a 100644
--- a/vendor/github.com/stretchr/testify/assert/assertion_format.go
+++ b/vendor/github.com/stretchr/testify/assert/assertion_format.go
@@ -114,6 +114,24 @@ func Errorf(t TestingT, err error, msg string, args ...interface{}) bool {
 	return Error(t, err, append([]interface{}{msg}, args...)...)
 }
 
+// ErrorAsf asserts that at least one of the errors in err's chain matches target, and if so, sets target to that error value.
+// This is a wrapper for errors.As.
+func ErrorAsf(t TestingT, err error, target interface{}, msg string, args ...interface{}) bool {
+	if h, ok := t.(tHelper); ok {
+		h.Helper()
+	}
+	return ErrorAs(t, err, target, append([]interface{}{msg}, args...)...)
+}
+
+// ErrorIsf asserts that at least one of the errors in err's chain matches target.
+// This is a wrapper for errors.Is.
+func ErrorIsf(t TestingT, err error, target error, msg string, args ...interface{}) bool {
+	if h, ok := t.(tHelper); ok {
+		h.Helper()
+	}
+	return ErrorIs(t, err, target, append([]interface{}{msg}, args...)...)
+}
+
 // Eventuallyf asserts that given condition will be met in waitFor time,
 // periodically checking target function each tick.
 //
@@ -321,6 +339,54 @@ func InEpsilonSlicef(t TestingT, expected interface{}, actual interface{}, epsil
 	return InEpsilonSlice(t, expected, actual, epsilon, append([]interface{}{msg}, args...)...)
 }
 
+// IsDecreasingf asserts that the collection is decreasing
+//
+//    assert.IsDecreasingf(t, []int{2, 1, 0}, "error message %s", "formatted")
+//    assert.IsDecreasingf(t, []float{2, 1}, "error message %s", "formatted")
+//    assert.IsDecreasingf(t, []string{"b", "a"}, "error message %s", "formatted")
+func IsDecreasingf(t TestingT, object interface{}, msg string, args ...interface{}) bool {
+	if h, ok := t.(tHelper); ok {
+		h.Helper()
+	}
+	return IsDecreasing(t, object, append([]interface{}{msg}, args...)...)
+}
+
+// IsIncreasingf asserts that the collection is increasing
+//
+//    assert.IsIncreasingf(t, []int{1, 2, 3}, "error message %s", "formatted")
+//    assert.IsIncreasingf(t, []float{1, 2}, "error message %s", "formatted")
+//    assert.IsIncreasingf(t, []string{"a", "b"}, "error message %s", "formatted")
+func IsIncreasingf(t TestingT, object interface{}, msg string, args ...interface{}) bool {
+	if h, ok := t.(tHelper); ok {
+		h.Helper()
+	}
+	return IsIncreasing(t, object, append([]interface{}{msg}, args...)...)
+}
+
+// IsNonDecreasingf asserts that the collection is not decreasing
+//
+//    assert.IsNonDecreasingf(t, []int{1, 1, 2}, "error message %s", "formatted")
+//    assert.IsNonDecreasingf(t, []float{1, 2}, "error message %s", "formatted")
+//    assert.IsNonDecreasingf(t, []string{"a", "b"}, "error message %s", "formatted")
+func IsNonDecreasingf(t TestingT, object interface{}, msg string, args ...interface{}) bool {
+	if h, ok := t.(tHelper); ok {
+		h.Helper()
+	}
+	return IsNonDecreasing(t, object, append([]interface{}{msg}, args...)...)
+}
+
+// IsNonIncreasingf asserts that the collection is not increasing
+//
+//    assert.IsNonIncreasingf(t, []int{2, 1, 1}, "error message %s", "formatted")
+//    assert.IsNonIncreasingf(t, []float{2, 1}, "error message %s", "formatted")
+//    assert.IsNonIncreasingf(t, []string{"b", "a"}, "error message %s", "formatted")
+func IsNonIncreasingf(t TestingT, object interface{}, msg string, args ...interface{}) bool {
+	if h, ok := t.(tHelper); ok {
+		h.Helper()
+	}
+	return IsNonIncreasing(t, object, append([]interface{}{msg}, args...)...)
+}
+
 // IsTypef asserts that the specified objects are of the same type.
 func IsTypef(t TestingT, expectedType interface{}, object interface{}, msg string, args ...interface{}) bool {
 	if h, ok := t.(tHelper); ok {
@@ -375,6 +441,17 @@ func LessOrEqualf(t TestingT, e1 interface{}, e2 interface{}, msg string, args .
 	return LessOrEqual(t, e1, e2, append([]interface{}{msg}, args...)...)
 }
 
+// Negativef asserts that the specified element is negative
+//
+//    assert.Negativef(t, -1, "error message %s", "formatted")
+//    assert.Negativef(t, -1.23, "error message %s", "formatted")
+func Negativef(t TestingT, e interface{}, msg string, args ...interface{}) bool {
+	if h, ok := t.(tHelper); ok {
+		h.Helper()
+	}
+	return Negative(t, e, append([]interface{}{msg}, args...)...)
+}
+
 // Neverf asserts that the given condition doesn't satisfy in waitFor time,
 // periodically checking the target function each tick.
 //
@@ -476,6 +553,15 @@ func NotEqualValuesf(t TestingT, expected interface{}, actual interface{}, msg s
 	return NotEqualValues(t, expected, actual, append([]interface{}{msg}, args...)...)
 }
 
+// NotErrorIsf asserts that at none of the errors in err's chain matches target.
+// This is a wrapper for errors.Is.
+func NotErrorIsf(t TestingT, err error, target error, msg string, args ...interface{}) bool {
+	if h, ok := t.(tHelper); ok {
+		h.Helper()
+	}
+	return NotErrorIs(t, err, target, append([]interface{}{msg}, args...)...)
+}
+
 // NotNilf asserts that the specified object is not nil.
 //
 //    assert.NotNilf(t, err, "error message %s", "formatted")
@@ -572,6 +658,17 @@ func PanicsWithValuef(t TestingT, expected interface{}, f PanicTestFunc, msg str
 	return PanicsWithValue(t, expected, f, append([]interface{}{msg}, args...)...)
 }
 
+// Positivef asserts that the specified element is positive
+//
+//    assert.Positivef(t, 1, "error message %s", "formatted")
+//    assert.Positivef(t, 1.23, "error message %s", "formatted")
+func Positivef(t TestingT, e interface{}, msg string, args ...interface{}) bool {
+	if h, ok := t.(tHelper); ok {
+		h.Helper()
+	}
+	return Positive(t, e, append([]interface{}{msg}, args...)...)
+}
+
 // Regexpf asserts that a specified regexp matches a string.
 //
 //  assert.Regexpf(t, regexp.MustCompile("start"), "it's starting", "error message %s", "formatted")
diff --git a/vendor/github.com/stretchr/testify/assert/assertion_forward.go b/vendor/github.com/stretchr/testify/assert/assertion_forward.go
index 9db889427..25337a6f0 100644
--- a/vendor/github.com/stretchr/testify/assert/assertion_forward.go
+++ b/vendor/github.com/stretchr/testify/assert/assertion_forward.go
@@ -204,6 +204,42 @@ func (a *Assertions) Error(err error, msgAndArgs ...interface{}) bool {
 	return Error(a.t, err, msgAndArgs...)
 }
 
+// ErrorAs asserts that at least one of the errors in err's chain matches target, and if so, sets target to that error value.
+// This is a wrapper for errors.As.
+func (a *Assertions) ErrorAs(err error, target interface{}, msgAndArgs ...interface{}) bool {
+	if h, ok := a.t.(tHelper); ok {
+		h.Helper()
+	}
+	return ErrorAs(a.t, err, target, msgAndArgs...)
+}
+
+// ErrorAsf asserts that at least one of the errors in err's chain matches target, and if so, sets target to that error value.
+// This is a wrapper for errors.As.
+func (a *Assertions) ErrorAsf(err error, target interface{}, msg string, args ...interface{}) bool {
+	if h, ok := a.t.(tHelper); ok {
+		h.Helper()
+	}
+	return ErrorAsf(a.t, err, target, msg, args...)
+}
+
+// ErrorIs asserts that at least one of the errors in err's chain matches target.
+// This is a wrapper for errors.Is.
+func (a *Assertions) ErrorIs(err error, target error, msgAndArgs ...interface{}) bool {
+	if h, ok := a.t.(tHelper); ok {
+		h.Helper()
+	}
+	return ErrorIs(a.t, err, target, msgAndArgs...)
+}
+
+// ErrorIsf asserts that at least one of the errors in err's chain matches target.
+// This is a wrapper for errors.Is.
+func (a *Assertions) ErrorIsf(err error, target error, msg string, args ...interface{}) bool {
+	if h, ok := a.t.(tHelper); ok {
+		h.Helper()
+	}
+	return ErrorIsf(a.t, err, target, msg, args...)
+}
+
 // Errorf asserts that a function returned an error (i.e. not `nil`).
 //
 //   actualObj, err := SomeFunction()
@@ -631,6 +667,102 @@ func (a *Assertions) InEpsilonf(expected interface{}, actual interface{}, epsilo
 	return InEpsilonf(a.t, expected, actual, epsilon, msg, args...)
 }
 
+// IsDecreasing asserts that the collection is decreasing
+//
+//    a.IsDecreasing([]int{2, 1, 0})
+//    a.IsDecreasing([]float{2, 1})
+//    a.IsDecreasing([]string{"b", "a"})
+func (a *Assertions) IsDecreasing(object interface{}, msgAndArgs ...interface{}) bool {
+	if h, ok := a.t.(tHelper); ok {
+		h.Helper()
+	}
+	return IsDecreasing(a.t, object, msgAndArgs...)
+}
+
+// IsDecreasingf asserts that the collection is decreasing
+//
+//    a.IsDecreasingf([]int{2, 1, 0}, "error message %s", "formatted")
+//    a.IsDecreasingf([]float{2, 1}, "error message %s", "formatted")
+//    a.IsDecreasingf([]string{"b", "a"}, "error message %s", "formatted")
+func (a *Assertions) IsDecreasingf(object interface{}, msg string, args ...interface{}) bool {
+	if h, ok := a.t.(tHelper); ok {
+		h.Helper()
+	}
+	return IsDecreasingf(a.t, object, msg, args...)
+}
+
+// IsIncreasing asserts that the collection is increasing
+//
+//    a.IsIncreasing([]int{1, 2, 3})
+//    a.IsIncreasing([]float{1, 2})
+//    a.IsIncreasing([]string{"a", "b"})
+func (a *Assertions) IsIncreasing(object interface{}, msgAndArgs ...interface{}) bool {
+	if h, ok := a.t.(tHelper); ok {
+		h.Helper()
+	}
+	return IsIncreasing(a.t, object, msgAndArgs...)
+}
+
+// IsIncreasingf asserts that the collection is increasing
+//
+//    a.IsIncreasingf([]int{1, 2, 3}, "error message %s", "formatted")
+//    a.IsIncreasingf([]float{1, 2}, "error message %s", "formatted")
+//    a.IsIncreasingf([]string{"a", "b"}, "error message %s", "formatted")
+func (a *Assertions) IsIncreasingf(object interface{}, msg string, args ...interface{}) bool {
+	if h, ok := a.t.(tHelper); ok {
+		h.Helper()
+	}
+	return IsIncreasingf(a.t, object, msg, args...)
+}
+
+// IsNonDecreasing asserts that the collection is not decreasing
+//
+//    a.IsNonDecreasing([]int{1, 1, 2})
+//    a.IsNonDecreasing([]float{1, 2})
+//    a.IsNonDecreasing([]string{"a", "b"})
+func (a *Assertions) IsNonDecreasing(object interface{}, msgAndArgs ...interface{}) bool {
+	if h, ok := a.t.(tHelper); ok {
+		h.Helper()
+	}
+	return IsNonDecreasing(a.t, object, msgAndArgs...)
+}
+
+// IsNonDecreasingf asserts that the collection is not decreasing
+//
+//    a.IsNonDecreasingf([]int{1, 1, 2}, "error message %s", "formatted")
+//    a.IsNonDecreasingf([]float{1, 2}, "error message %s", "formatted")
+//    a.IsNonDecreasingf([]string{"a", "b"}, "error message %s", "formatted")
+func (a *Assertions) IsNonDecreasingf(object interface{}, msg string, args ...interface{}) bool {
+	if h, ok := a.t.(tHelper); ok {
+		h.Helper()
+	}
+	return IsNonDecreasingf(a.t, object, msg, args...)
+}
+
+// IsNonIncreasing asserts that the collection is not increasing
+//
+//    a.IsNonIncreasing([]int{2, 1, 1})
+//    a.IsNonIncreasing([]float{2, 1})
+//    a.IsNonIncreasing([]string{"b", "a"})
+func (a *Assertions) IsNonIncreasing(object interface{}, msgAndArgs ...interface{}) bool {
+	if h, ok := a.t.(tHelper); ok {
+		h.Helper()
+	}
+	return IsNonIncreasing(a.t, object, msgAndArgs...)
+}
+
+// IsNonIncreasingf asserts that the collection is not increasing
+//
+//    a.IsNonIncreasingf([]int{2, 1, 1}, "error message %s", "formatted")
+//    a.IsNonIncreasingf([]float{2, 1}, "error message %s", "formatted")
+//    a.IsNonIncreasingf([]string{"b", "a"}, "error message %s", "formatted")
+func (a *Assertions) IsNonIncreasingf(object interface{}, msg string, args ...interface{}) bool {
+	if h, ok := a.t.(tHelper); ok {
+		h.Helper()
+	}
+	return IsNonIncreasingf(a.t, object, msg, args...)
+}
+
 // IsType asserts that the specified objects are of the same type.
 func (a *Assertions) IsType(expectedType interface{}, object interface{}, msgAndArgs ...interface{}) bool {
 	if h, ok := a.t.(tHelper); ok {
@@ -739,6 +871,28 @@ func (a *Assertions) Lessf(e1 interface{}, e2 interface{}, msg string, args ...i
 	return Lessf(a.t, e1, e2, msg, args...)
 }
 
+// Negative asserts that the specified element is negative
+//
+//    a.Negative(-1)
+//    a.Negative(-1.23)
+func (a *Assertions) Negative(e interface{}, msgAndArgs ...interface{}) bool {
+	if h, ok := a.t.(tHelper); ok {
+		h.Helper()
+	}
+	return Negative(a.t, e, msgAndArgs...)
+}
+
+// Negativef asserts that the specified element is negative
+//
+//    a.Negativef(-1, "error message %s", "formatted")
+//    a.Negativef(-1.23, "error message %s", "formatted")
+func (a *Assertions) Negativef(e interface{}, msg string, args ...interface{}) bool {
+	if h, ok := a.t.(tHelper); ok {
+		h.Helper()
+	}
+	return Negativef(a.t, e, msg, args...)
+}
+
 // Never asserts that the given condition doesn't satisfy in waitFor time,
 // periodically checking the target function each tick.
 //
@@ -941,6 +1095,24 @@ func (a *Assertions) NotEqualf(expected interface{}, actual interface{}, msg str
 	return NotEqualf(a.t, expected, actual, msg, args...)
 }
 
+// NotErrorIs asserts that at none of the errors in err's chain matches target.
+// This is a wrapper for errors.Is.
+func (a *Assertions) NotErrorIs(err error, target error, msgAndArgs ...interface{}) bool {
+	if h, ok := a.t.(tHelper); ok {
+		h.Helper()
+	}
+	return NotErrorIs(a.t, err, target, msgAndArgs...)
+}
+
+// NotErrorIsf asserts that at none of the errors in err's chain matches target.
+// This is a wrapper for errors.Is.
+func (a *Assertions) NotErrorIsf(err error, target error, msg string, args ...interface{}) bool {
+	if h, ok := a.t.(tHelper); ok {
+		h.Helper()
+	}
+	return NotErrorIsf(a.t, err, target, msg, args...)
+}
+
 // NotNil asserts that the specified object is not nil.
 //
 //    a.NotNil(err)
@@ -1133,6 +1305,28 @@ func (a *Assertions) Panicsf(f PanicTestFunc, msg string, args ...interface{}) b
 	return Panicsf(a.t, f, msg, args...)
 }
 
+// Positive asserts that the specified element is positive
+//
+//    a.Positive(1)
+//    a.Positive(1.23)
+func (a *Assertions) Positive(e interface{}, msgAndArgs ...interface{}) bool {
+	if h, ok := a.t.(tHelper); ok {
+		h.Helper()
+	}
+	return Positive(a.t, e, msgAndArgs...)
+}
+
+// Positivef asserts that the specified element is positive
+//
+//    a.Positivef(1, "error message %s", "formatted")
+//    a.Positivef(1.23, "error message %s", "formatted")
+func (a *Assertions) Positivef(e interface{}, msg string, args ...interface{}) bool {
+	if h, ok := a.t.(tHelper); ok {
+		h.Helper()
+	}
+	return Positivef(a.t, e, msg, args...)
+}
+
 // Regexp asserts that a specified regexp matches a string.
 //
 //  a.Regexp(regexp.MustCompile("start"), "it's starting")
diff --git a/vendor/github.com/stretchr/testify/assert/assertion_order.go b/vendor/github.com/stretchr/testify/assert/assertion_order.go
new file mode 100644
index 000000000..1c3b47182
--- /dev/null
+++ b/vendor/github.com/stretchr/testify/assert/assertion_order.go
@@ -0,0 +1,81 @@
+package assert
+
+import (
+	"fmt"
+	"reflect"
+)
+
+// isOrdered checks that collection contains orderable elements.
+func isOrdered(t TestingT, object interface{}, allowedComparesResults []CompareType, failMessage string, msgAndArgs ...interface{}) bool {
+	objKind := reflect.TypeOf(object).Kind()
+	if objKind != reflect.Slice && objKind != reflect.Array {
+		return false
+	}
+
+	objValue := reflect.ValueOf(object)
+	objLen := objValue.Len()
+
+	if objLen <= 1 {
+		return true
+	}
+
+	value := objValue.Index(0)
+	valueInterface := value.Interface()
+	firstValueKind := value.Kind()
+
+	for i := 1; i < objLen; i++ {
+		prevValue := value
+		prevValueInterface := valueInterface
+
+		value = objValue.Index(i)
+		valueInterface = value.Interface()
+
+		compareResult, isComparable := compare(prevValueInterface, valueInterface, firstValueKind)
+
+		if !isComparable {
+			return Fail(t, fmt.Sprintf("Can not compare type \"%s\" and \"%s\"", reflect.TypeOf(value), reflect.TypeOf(prevValue)), msgAndArgs...)
+		}
+
+		if !containsValue(allowedComparesResults, compareResult) {
+			return Fail(t, fmt.Sprintf(failMessage, prevValue, value), msgAndArgs...)
+		}
+	}
+
+	return true
+}
+
+// IsIncreasing asserts that the collection is increasing
+//
+//    assert.IsIncreasing(t, []int{1, 2, 3})
+//    assert.IsIncreasing(t, []float{1, 2})
+//    assert.IsIncreasing(t, []string{"a", "b"})
+func IsIncreasing(t TestingT, object interface{}, msgAndArgs ...interface{}) bool {
+	return isOrdered(t, object, []CompareType{compareLess}, "\"%v\" is not less than \"%v\"", msgAndArgs)
+}
+
+// IsNonIncreasing asserts that the collection is not increasing
+//
+//    assert.IsNonIncreasing(t, []int{2, 1, 1})
+//    assert.IsNonIncreasing(t, []float{2, 1})
+//    assert.IsNonIncreasing(t, []string{"b", "a"})
+func IsNonIncreasing(t TestingT, object interface{}, msgAndArgs ...interface{}) bool {
+	return isOrdered(t, object, []CompareType{compareEqual, compareGreater}, "\"%v\" is not greater than or equal to \"%v\"", msgAndArgs)
+}
+
+// IsDecreasing asserts that the collection is decreasing
+//
+//    assert.IsDecreasing(t, []int{2, 1, 0})
+//    assert.IsDecreasing(t, []float{2, 1})
+//    assert.IsDecreasing(t, []string{"b", "a"})
+func IsDecreasing(t TestingT, object interface{}, msgAndArgs ...interface{}) bool {
+	return isOrdered(t, object, []CompareType{compareGreater}, "\"%v\" is not greater than \"%v\"", msgAndArgs)
+}
+
+// IsNonDecreasing asserts that the collection is not decreasing
+//
+//    assert.IsNonDecreasing(t, []int{1, 1, 2})
+//    assert.IsNonDecreasing(t, []float{1, 2})
+//    assert.IsNonDecreasing(t, []string{"a", "b"})
+func IsNonDecreasing(t TestingT, object interface{}, msgAndArgs ...interface{}) bool {
+	return isOrdered(t, object, []CompareType{compareLess, compareEqual}, "\"%v\" is not less than or equal to \"%v\"", msgAndArgs)
+}
diff --git a/vendor/github.com/stretchr/testify/assert/assertions.go b/vendor/github.com/stretchr/testify/assert/assertions.go
index 914a10d83..bcac4401f 100644
--- a/vendor/github.com/stretchr/testify/assert/assertions.go
+++ b/vendor/github.com/stretchr/testify/assert/assertions.go
@@ -172,8 +172,8 @@ func isTest(name, prefix string) bool {
 	if len(name) == len(prefix) { // "Test" is ok
 		return true
 	}
-	rune, _ := utf8.DecodeRuneInString(name[len(prefix):])
-	return !unicode.IsLower(rune)
+	r, _ := utf8.DecodeRuneInString(name[len(prefix):])
+	return !unicode.IsLower(r)
 }
 
 func messageFromMsgAndArgs(msgAndArgs ...interface{}) string {
@@ -1622,6 +1622,7 @@ var spewConfig = spew.ConfigState{
 	DisableCapacities:       true,
 	SortKeys:                true,
 	DisableMethods:          true,
+	MaxDepth:                10,
 }
 
 type tHelper interface {
@@ -1693,3 +1694,81 @@ func Never(t TestingT, condition func() bool, waitFor time.Duration, tick time.D
 		}
 	}
 }
+
+// ErrorIs asserts that at least one of the errors in err's chain matches target.
+// This is a wrapper for errors.Is.
+func ErrorIs(t TestingT, err, target error, msgAndArgs ...interface{}) bool {
+	if h, ok := t.(tHelper); ok {
+		h.Helper()
+	}
+	if errors.Is(err, target) {
+		return true
+	}
+
+	var expectedText string
+	if target != nil {
+		expectedText = target.Error()
+	}
+
+	chain := buildErrorChainString(err)
+
+	return Fail(t, fmt.Sprintf("Target error should be in err chain:\n"+
+		"expected: %q\n"+
+		"in chain: %s", expectedText, chain,
+	), msgAndArgs...)
+}
+
+// NotErrorIs asserts that at none of the errors in err's chain matches target.
+// This is a wrapper for errors.Is.
+func NotErrorIs(t TestingT, err, target error, msgAndArgs ...interface{}) bool {
+	if h, ok := t.(tHelper); ok {
+		h.Helper()
+	}
+	if !errors.Is(err, target) {
+		return true
+	}
+
+	var expectedText string
+	if target != nil {
+		expectedText = target.Error()
+	}
+
+	chain := buildErrorChainString(err)
+
+	return Fail(t, fmt.Sprintf("Target error should not be in err chain:\n"+
+		"found: %q\n"+
+		"in chain: %s", expectedText, chain,
+	), msgAndArgs...)
+}
+
+// ErrorAs asserts that at least one of the errors in err's chain matches target, and if so, sets target to that error value.
+// This is a wrapper for errors.As.
+func ErrorAs(t TestingT, err error, target interface{}, msgAndArgs ...interface{}) bool {
+	if h, ok := t.(tHelper); ok {
+		h.Helper()
+	}
+	if errors.As(err, target) {
+		return true
+	}
+
+	chain := buildErrorChainString(err)
+
+	return Fail(t, fmt.Sprintf("Should be in error chain:\n"+
+		"expected: %q\n"+
+		"in chain: %s", target, chain,
+	), msgAndArgs...)
+}
+
+func buildErrorChainString(err error) string {
+	if err == nil {
+		return ""
+	}
+
+	e := errors.Unwrap(err)
+	chain := fmt.Sprintf("%q", err.Error())
+	for e != nil {
+		chain += fmt.Sprintf("\n\t%q", e.Error())
+		e = errors.Unwrap(e)
+	}
+	return chain
+}
diff --git a/vendor/github.com/stretchr/testify/require/require.go b/vendor/github.com/stretchr/testify/require/require.go
index ec4624b28..51820df2e 100644
--- a/vendor/github.com/stretchr/testify/require/require.go
+++ b/vendor/github.com/stretchr/testify/require/require.go
@@ -256,6 +256,54 @@ func Error(t TestingT, err error, msgAndArgs ...interface{}) {
 	t.FailNow()
 }
 
+// ErrorAs asserts that at least one of the errors in err's chain matches target, and if so, sets target to that error value.
+// This is a wrapper for errors.As.
+func ErrorAs(t TestingT, err error, target interface{}, msgAndArgs ...interface{}) {
+	if h, ok := t.(tHelper); ok {
+		h.Helper()
+	}
+	if assert.ErrorAs(t, err, target, msgAndArgs...) {
+		return
+	}
+	t.FailNow()
+}
+
+// ErrorAsf asserts that at least one of the errors in err's chain matches target, and if so, sets target to that error value.
+// This is a wrapper for errors.As.
+func ErrorAsf(t TestingT, err error, target interface{}, msg string, args ...interface{}) {
+	if h, ok := t.(tHelper); ok {
+		h.Helper()
+	}
+	if assert.ErrorAsf(t, err, target, msg, args...) {
+		return
+	}
+	t.FailNow()
+}
+
+// ErrorIs asserts that at least one of the errors in err's chain matches target.
+// This is a wrapper for errors.Is.
+func ErrorIs(t TestingT, err error, target error, msgAndArgs ...interface{}) {
+	if h, ok := t.(tHelper); ok {
+		h.Helper()
+	}
+	if assert.ErrorIs(t, err, target, msgAndArgs...) {
+		return
+	}
+	t.FailNow()
+}
+
+// ErrorIsf asserts that at least one of the errors in err's chain matches target.
+// This is a wrapper for errors.Is.
+func ErrorIsf(t TestingT, err error, target error, msg string, args ...interface{}) {
+	if h, ok := t.(tHelper); ok {
+		h.Helper()
+	}
+	if assert.ErrorIsf(t, err, target, msg, args...) {
+		return
+	}
+	t.FailNow()
+}
+
 // Errorf asserts that a function returned an error (i.e. not `nil`).
 //
 //   actualObj, err := SomeFunction()
@@ -806,6 +854,126 @@ func InEpsilonf(t TestingT, expected interface{}, actual interface{}, epsilon fl
 	t.FailNow()
 }
 
+// IsDecreasing asserts that the collection is decreasing
+//
+//    assert.IsDecreasing(t, []int{2, 1, 0})
+//    assert.IsDecreasing(t, []float{2, 1})
+//    assert.IsDecreasing(t, []string{"b", "a"})
+func IsDecreasing(t TestingT, object interface{}, msgAndArgs ...interface{}) {
+	if h, ok := t.(tHelper); ok {
+		h.Helper()
+	}
+	if assert.IsDecreasing(t, object, msgAndArgs...) {
+		return
+	}
+	t.FailNow()
+}
+
+// IsDecreasingf asserts that the collection is decreasing
+//
+//    assert.IsDecreasingf(t, []int{2, 1, 0}, "error message %s", "formatted")
+//    assert.IsDecreasingf(t, []float{2, 1}, "error message %s", "formatted")
+//    assert.IsDecreasingf(t, []string{"b", "a"}, "error message %s", "formatted")
+func IsDecreasingf(t TestingT, object interface{}, msg string, args ...interface{}) {
+	if h, ok := t.(tHelper); ok {
+		h.Helper()
+	}
+	if assert.IsDecreasingf(t, object, msg, args...) {
+		return
+	}
+	t.FailNow()
+}
+
+// IsIncreasing asserts that the collection is increasing
+//
+//    assert.IsIncreasing(t, []int{1, 2, 3})
+//    assert.IsIncreasing(t, []float{1, 2})
+//    assert.IsIncreasing(t, []string{"a", "b"})
+func IsIncreasing(t TestingT, object interface{}, msgAndArgs ...interface{}) {
+	if h, ok := t.(tHelper); ok {
+		h.Helper()
+	}
+	if assert.IsIncreasing(t, object, msgAndArgs...) {
+		return
+	}
+	t.FailNow()
+}
+
+// IsIncreasingf asserts that the collection is increasing
+//
+//    assert.IsIncreasingf(t, []int{1, 2, 3}, "error message %s", "formatted")
+//    assert.IsIncreasingf(t, []float{1, 2}, "error message %s", "formatted")
+//    assert.IsIncreasingf(t, []string{"a", "b"}, "error message %s", "formatted")
+func IsIncreasingf(t TestingT, object interface{}, msg string, args ...interface{}) {
+	if h, ok := t.(tHelper); ok {
+		h.Helper()
+	}
+	if assert.IsIncreasingf(t, object, msg, args...) {
+		return
+	}
+	t.FailNow()
+}
+
+// IsNonDecreasing asserts that the collection is not decreasing
+//
+//    assert.IsNonDecreasing(t, []int{1, 1, 2})
+//    assert.IsNonDecreasing(t, []float{1, 2})
+//    assert.IsNonDecreasing(t, []string{"a", "b"})
+func IsNonDecreasing(t TestingT, object interface{}, msgAndArgs ...interface{}) {
+	if h, ok := t.(tHelper); ok {
+		h.Helper()
+	}
+	if assert.IsNonDecreasing(t, object, msgAndArgs...) {
+		return
+	}
+	t.FailNow()
+}
+
+// IsNonDecreasingf asserts that the collection is not decreasing
+//
+//    assert.IsNonDecreasingf(t, []int{1, 1, 2}, "error message %s", "formatted")
+//    assert.IsNonDecreasingf(t, []float{1, 2}, "error message %s", "formatted")
+//    assert.IsNonDecreasingf(t, []string{"a", "b"}, "error message %s", "formatted")
+func IsNonDecreasingf(t TestingT, object interface{}, msg string, args ...interface{}) {
+	if h, ok := t.(tHelper); ok {
+		h.Helper()
+	}
+	if assert.IsNonDecreasingf(t, object, msg, args...) {
+		return
+	}
+	t.FailNow()
+}
+
+// IsNonIncreasing asserts that the collection is not increasing
+//
+//    assert.IsNonIncreasing(t, []int{2, 1, 1})
+//    assert.IsNonIncreasing(t, []float{2, 1})
+//    assert.IsNonIncreasing(t, []string{"b", "a"})
+func IsNonIncreasing(t TestingT, object interface{}, msgAndArgs ...interface{}) {
+	if h, ok := t.(tHelper); ok {
+		h.Helper()
+	}
+	if assert.IsNonIncreasing(t, object, msgAndArgs...) {
+		return
+	}
+	t.FailNow()
+}
+
+// IsNonIncreasingf asserts that the collection is not increasing
+//
+//    assert.IsNonIncreasingf(t, []int{2, 1, 1}, "error message %s", "formatted")
+//    assert.IsNonIncreasingf(t, []float{2, 1}, "error message %s", "formatted")
+//    assert.IsNonIncreasingf(t, []string{"b", "a"}, "error message %s", "formatted")
+func IsNonIncreasingf(t TestingT, object interface{}, msg string, args ...interface{}) {
+	if h, ok := t.(tHelper); ok {
+		h.Helper()
+	}
+	if assert.IsNonIncreasingf(t, object, msg, args...) {
+		return
+	}
+	t.FailNow()
+}
+
 // IsType asserts that the specified objects are of the same type.
 func IsType(t TestingT, expectedType interface{}, object interface{}, msgAndArgs ...interface{}) {
 	if h, ok := t.(tHelper); ok {
@@ -944,6 +1112,34 @@ func Lessf(t TestingT, e1 interface{}, e2 interface{}, msg string, args ...inter
 	t.FailNow()
 }
 
+// Negative asserts that the specified element is negative
+//
+//    assert.Negative(t, -1)
+//    assert.Negative(t, -1.23)
+func Negative(t TestingT, e interface{}, msgAndArgs ...interface{}) {
+	if h, ok := t.(tHelper); ok {
+		h.Helper()
+	}
+	if assert.Negative(t, e, msgAndArgs...) {
+		return
+	}
+	t.FailNow()
+}
+
+// Negativef asserts that the specified element is negative
+//
+//    assert.Negativef(t, -1, "error message %s", "formatted")
+//    assert.Negativef(t, -1.23, "error message %s", "formatted")
+func Negativef(t TestingT, e interface{}, msg string, args ...interface{}) {
+	if h, ok := t.(tHelper); ok {
+		h.Helper()
+	}
+	if assert.Negativef(t, e, msg, args...) {
+		return
+	}
+	t.FailNow()
+}
+
 // Never asserts that the given condition doesn't satisfy in waitFor time,
 // periodically checking the target function each tick.
 //
@@ -1200,6 +1396,30 @@ func NotEqualf(t TestingT, expected interface{}, actual interface{}, msg string,
 	t.FailNow()
 }
 
+// NotErrorIs asserts that at none of the errors in err's chain matches target.
+// This is a wrapper for errors.Is.
+func NotErrorIs(t TestingT, err error, target error, msgAndArgs ...interface{}) {
+	if h, ok := t.(tHelper); ok {
+		h.Helper()
+	}
+	if assert.NotErrorIs(t, err, target, msgAndArgs...) {
+		return
+	}
+	t.FailNow()
+}
+
+// NotErrorIsf asserts that at none of the errors in err's chain matches target.
+// This is a wrapper for errors.Is.
+func NotErrorIsf(t TestingT, err error, target error, msg string, args ...interface{}) {
+	if h, ok := t.(tHelper); ok {
+		h.Helper()
+	}
+	if assert.NotErrorIsf(t, err, target, msg, args...) {
+		return
+	}
+	t.FailNow()
+}
+
 // NotNil asserts that the specified object is not nil.
 //
 //    assert.NotNil(t, err)
@@ -1446,6 +1666,34 @@ func Panicsf(t TestingT, f assert.PanicTestFunc, msg string, args ...interface{}
 	t.FailNow()
 }
 
+// Positive asserts that the specified element is positive
+//
+//    assert.Positive(t, 1)
+//    assert.Positive(t, 1.23)
+func Positive(t TestingT, e interface{}, msgAndArgs ...interface{}) {
+	if h, ok := t.(tHelper); ok {
+		h.Helper()
+	}
+	if assert.Positive(t, e, msgAndArgs...) {
+		return
+	}
+	t.FailNow()
+}
+
+// Positivef asserts that the specified element is positive
+//
+//    assert.Positivef(t, 1, "error message %s", "formatted")
+//    assert.Positivef(t, 1.23, "error message %s", "formatted")
+func Positivef(t TestingT, e interface{}, msg string, args ...interface{}) {
+	if h, ok := t.(tHelper); ok {
+		h.Helper()
+	}
+	if assert.Positivef(t, e, msg, args...) {
+		return
+	}
+	t.FailNow()
+}
+
 // Regexp asserts that a specified regexp matches a string.
 //
 //  assert.Regexp(t, regexp.MustCompile("start"), "it's starting")
diff --git a/vendor/github.com/stretchr/testify/require/require_forward.go b/vendor/github.com/stretchr/testify/require/require_forward.go
index 103d7dcb6..ed54a9d83 100644
--- a/vendor/github.com/stretchr/testify/require/require_forward.go
+++ b/vendor/github.com/stretchr/testify/require/require_forward.go
@@ -205,6 +205,42 @@ func (a *Assertions) Error(err error, msgAndArgs ...interface{}) {
 	Error(a.t, err, msgAndArgs...)
 }
 
+// ErrorAs asserts that at least one of the errors in err's chain matches target, and if so, sets target to that error value.
+// This is a wrapper for errors.As.
+func (a *Assertions) ErrorAs(err error, target interface{}, msgAndArgs ...interface{}) {
+	if h, ok := a.t.(tHelper); ok {
+		h.Helper()
+	}
+	ErrorAs(a.t, err, target, msgAndArgs...)
+}
+
+// ErrorAsf asserts that at least one of the errors in err's chain matches target, and if so, sets target to that error value.
+// This is a wrapper for errors.As.
+func (a *Assertions) ErrorAsf(err error, target interface{}, msg string, args ...interface{}) {
+	if h, ok := a.t.(tHelper); ok {
+		h.Helper()
+	}
+	ErrorAsf(a.t, err, target, msg, args...)
+}
+
+// ErrorIs asserts that at least one of the errors in err's chain matches target.
+// This is a wrapper for errors.Is.
+func (a *Assertions) ErrorIs(err error, target error, msgAndArgs ...interface{}) {
+	if h, ok := a.t.(tHelper); ok {
+		h.Helper()
+	}
+	ErrorIs(a.t, err, target, msgAndArgs...)
+}
+
+// ErrorIsf asserts that at least one of the errors in err's chain matches target.
+// This is a wrapper for errors.Is.
+func (a *Assertions) ErrorIsf(err error, target error, msg string, args ...interface{}) {
+	if h, ok := a.t.(tHelper); ok {
+		h.Helper()
+	}
+	ErrorIsf(a.t, err, target, msg, args...)
+}
+
 // Errorf asserts that a function returned an error (i.e. not `nil`).
 //
 //   actualObj, err := SomeFunction()
@@ -632,6 +668,102 @@ func (a *Assertions) InEpsilonf(expected interface{}, actual interface{}, epsilo
 	InEpsilonf(a.t, expected, actual, epsilon, msg, args...)
 }
 
+// IsDecreasing asserts that the collection is decreasing
+//
+//    a.IsDecreasing([]int{2, 1, 0})
+//    a.IsDecreasing([]float{2, 1})
+//    a.IsDecreasing([]string{"b", "a"})
+func (a *Assertions) IsDecreasing(object interface{}, msgAndArgs ...interface{}) {
+	if h, ok := a.t.(tHelper); ok {
+		h.Helper()
+	}
+	IsDecreasing(a.t, object, msgAndArgs...)
+}
+
+// IsDecreasingf asserts that the collection is decreasing
+//
+//    a.IsDecreasingf([]int{2, 1, 0}, "error message %s", "formatted")
+//    a.IsDecreasingf([]float{2, 1}, "error message %s", "formatted")
+//    a.IsDecreasingf([]string{"b", "a"}, "error message %s", "formatted")
+func (a *Assertions) IsDecreasingf(object interface{}, msg string, args ...interface{}) {
+	if h, ok := a.t.(tHelper); ok {
+		h.Helper()
+	}
+	IsDecreasingf(a.t, object, msg, args...)
+}
+
+// IsIncreasing asserts that the collection is increasing
+//
+//    a.IsIncreasing([]int{1, 2, 3})
+//    a.IsIncreasing([]float{1, 2})
+//    a.IsIncreasing([]string{"a", "b"})
+func (a *Assertions) IsIncreasing(object interface{}, msgAndArgs ...interface{}) {
+	if h, ok := a.t.(tHelper); ok {
+		h.Helper()
+	}
+	IsIncreasing(a.t, object, msgAndArgs...)
+}
+
+// IsIncreasingf asserts that the collection is increasing
+//
+//    a.IsIncreasingf([]int{1, 2, 3}, "error message %s", "formatted")
+//    a.IsIncreasingf([]float{1, 2}, "error message %s", "formatted")
+//    a.IsIncreasingf([]string{"a", "b"}, "error message %s", "formatted")
+func (a *Assertions) IsIncreasingf(object interface{}, msg string, args ...interface{}) {
+	if h, ok := a.t.(tHelper); ok {
+		h.Helper()
+	}
+	IsIncreasingf(a.t, object, msg, args...)
+}
+
+// IsNonDecreasing asserts that the collection is not decreasing
+//
+//    a.IsNonDecreasing([]int{1, 1, 2})
+//    a.IsNonDecreasing([]float{1, 2})
+//    a.IsNonDecreasing([]string{"a", "b"})
+func (a *Assertions) IsNonDecreasing(object interface{}, msgAndArgs ...interface{}) {
+	if h, ok := a.t.(tHelper); ok {
+		h.Helper()
+	}
+	IsNonDecreasing(a.t, object, msgAndArgs...)
+}
+
+// IsNonDecreasingf asserts that the collection is not decreasing
+//
+//    a.IsNonDecreasingf([]int{1, 1, 2}, "error message %s", "formatted")
+//    a.IsNonDecreasingf([]float{1, 2}, "error message %s", "formatted")
+//    a.IsNonDecreasingf([]string{"a", "b"}, "error message %s", "formatted")
+func (a *Assertions) IsNonDecreasingf(object interface{}, msg string, args ...interface{}) {
+	if h, ok := a.t.(tHelper); ok {
+		h.Helper()
+	}
+	IsNonDecreasingf(a.t, object, msg, args...)
+}
+
+// IsNonIncreasing asserts that the collection is not increasing
+//
+//    a.IsNonIncreasing([]int{2, 1, 1})
+//    a.IsNonIncreasing([]float{2, 1})
+//    a.IsNonIncreasing([]string{"b", "a"})
+func (a *Assertions) IsNonIncreasing(object interface{}, msgAndArgs ...interface{}) {
+	if h, ok := a.t.(tHelper); ok {
+		h.Helper()
+	}
+	IsNonIncreasing(a.t, object, msgAndArgs...)
+}
+
+// IsNonIncreasingf asserts that the collection is not increasing
+//
+//    a.IsNonIncreasingf([]int{2, 1, 1}, "error message %s", "formatted")
+//    a.IsNonIncreasingf([]float{2, 1}, "error message %s", "formatted")
+//    a.IsNonIncreasingf([]string{"b", "a"}, "error message %s", "formatted")
+func (a *Assertions) IsNonIncreasingf(object interface{}, msg string, args ...interface{}) {
+	if h, ok := a.t.(tHelper); ok {
+		h.Helper()
+	}
+	IsNonIncreasingf(a.t, object, msg, args...)
+}
+
 // IsType asserts that the specified objects are of the same type.
 func (a *Assertions) IsType(expectedType interface{}, object interface{}, msgAndArgs ...interface{}) {
 	if h, ok := a.t.(tHelper); ok {
@@ -740,6 +872,28 @@ func (a *Assertions) Lessf(e1 interface{}, e2 interface{}, msg string, args ...i
 	Lessf(a.t, e1, e2, msg, args...)
 }
 
+// Negative asserts that the specified element is negative
+//
+//    a.Negative(-1)
+//    a.Negative(-1.23)
+func (a *Assertions) Negative(e interface{}, msgAndArgs ...interface{}) {
+	if h, ok := a.t.(tHelper); ok {
+		h.Helper()
+	}
+	Negative(a.t, e, msgAndArgs...)
+}
+
+// Negativef asserts that the specified element is negative
+//
+//    a.Negativef(-1, "error message %s", "formatted")
+//    a.Negativef(-1.23, "error message %s", "formatted")
+func (a *Assertions) Negativef(e interface{}, msg string, args ...interface{}) {
+	if h, ok := a.t.(tHelper); ok {
+		h.Helper()
+	}
+	Negativef(a.t, e, msg, args...)
+}
+
 // Never asserts that the given condition doesn't satisfy in waitFor time,
 // periodically checking the target function each tick.
 //
@@ -942,6 +1096,24 @@ func (a *Assertions) NotEqualf(expected interface{}, actual interface{}, msg str
 	NotEqualf(a.t, expected, actual, msg, args...)
 }
 
+// NotErrorIs asserts that at none of the errors in err's chain matches target.
+// This is a wrapper for errors.Is.
+func (a *Assertions) NotErrorIs(err error, target error, msgAndArgs ...interface{}) {
+	if h, ok := a.t.(tHelper); ok {
+		h.Helper()
+	}
+	NotErrorIs(a.t, err, target, msgAndArgs...)
+}
+
+// NotErrorIsf asserts that at none of the errors in err's chain matches target.
+// This is a wrapper for errors.Is.
+func (a *Assertions) NotErrorIsf(err error, target error, msg string, args ...interface{}) {
+	if h, ok := a.t.(tHelper); ok {
+		h.Helper()
+	}
+	NotErrorIsf(a.t, err, target, msg, args...)
+}
+
 // NotNil asserts that the specified object is not nil.
 //
 //    a.NotNil(err)
@@ -1134,6 +1306,28 @@ func (a *Assertions) Panicsf(f assert.PanicTestFunc, msg string, args ...interfa
 	Panicsf(a.t, f, msg, args...)
 }
 
+// Positive asserts that the specified element is positive
+//
+//    a.Positive(1)
+//    a.Positive(1.23)
+func (a *Assertions) Positive(e interface{}, msgAndArgs ...interface{}) {
+	if h, ok := a.t.(tHelper); ok {
+		h.Helper()
+	}
+	Positive(a.t, e, msgAndArgs...)
+}
+
+// Positivef asserts that the specified element is positive
+//
+//    a.Positivef(1, "error message %s", "formatted")
+//    a.Positivef(1.23, "error message %s", "formatted")
+func (a *Assertions) Positivef(e interface{}, msg string, args ...interface{}) {
+	if h, ok := a.t.(tHelper); ok {
+		h.Helper()
+	}
+	Positivef(a.t, e, msg, args...)
+}
+
 // Regexp asserts that a specified regexp matches a string.
 //
 //  a.Regexp(regexp.MustCompile("start"), "it's starting")
diff --git a/vendor/go.opentelemetry.io/contrib/.gitattributes b/vendor/go.opentelemetry.io/contrib/.gitattributes
new file mode 100644
index 000000000..314766e91
--- /dev/null
+++ b/vendor/go.opentelemetry.io/contrib/.gitattributes
@@ -0,0 +1,3 @@
+* text=auto eol=lf
+*.{cmd,[cC][mM][dD]} text eol=crlf
+*.{bat,[bB][aA][tT]} text eol=crlf
diff --git a/vendor/go.opentelemetry.io/contrib/.gitignore b/vendor/go.opentelemetry.io/contrib/.gitignore
new file mode 100644
index 000000000..21ab270fe
--- /dev/null
+++ b/vendor/go.opentelemetry.io/contrib/.gitignore
@@ -0,0 +1,13 @@
+.DS_Store
+Thumbs.db
+
+.tools/
+.idea/
+.vscode/
+*.iml
+*.so
+coverage.*
+example
+
+instrumentation/google.golang.org/grpc/otelgrpc/example/server/server
+instrumentation/google.golang.org/grpc/otelgrpc/example/client/client
\ No newline at end of file
diff --git a/vendor/go.opentelemetry.io/contrib/.golangci.yml b/vendor/go.opentelemetry.io/contrib/.golangci.yml
new file mode 100644
index 000000000..eb43a1bdd
--- /dev/null
+++ b/vendor/go.opentelemetry.io/contrib/.golangci.yml
@@ -0,0 +1,32 @@
+# See https://github.com/golangci/golangci-lint#config-file
+run:
+  issues-exit-code: 1 #Default
+  tests: true #Default
+
+linters:
+  enable:
+    - misspell
+    - goimports
+    - revive
+    - gofmt
+
+issues:
+  exclude-rules:
+    # helpers in tests often (rightfully) pass a *testing.T as their first argument
+    - path: _test\.go
+      text: "context.Context should be the first parameter of a function"
+      linters:
+        - revive
+    # Yes, they are, but it's okay in a test
+    - path: _test\.go
+      text: "exported func.*returns unexported type.*which can be annoying to use"
+      linters:
+        - revive
+
+linters-settings:
+  misspell:
+    locale: US
+    #ignore-words:
+    #  - someword
+  goimports:
+    local-prefixes: go.opentelemetry.io
diff --git a/vendor/go.opentelemetry.io/contrib/CHANGELOG.md b/vendor/go.opentelemetry.io/contrib/CHANGELOG.md
new file mode 100644
index 000000000..bdaf662e8
--- /dev/null
+++ b/vendor/go.opentelemetry.io/contrib/CHANGELOG.md
@@ -0,0 +1,336 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
+
+This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [Unreleased]
+
+## [0.21.0] - 2021-06-18
+
+### Fixed
+
+- Dockerfile based examples for `otelgin` and `otelmacaron`. (#767)
+
+### Changed
+
+- Supported minimum version of Go bumped from 1.14 to 1.15. (#787)
+- EKS Resource Detector now use the Kubernetes Go client to obtain the ConfigMap. (#813)
+
+### Removed
+
+- Remove service name from `otelmongodb` configuration and span attributes. (#763)
+
+## [0.20.0] - 2021-04-23
+
+### Changed
+
+- The `go.opentelemetry.io/contrib/instrumentation/go.mongodb.org/mongo-driver/mongo/otelmongo` instrumentation now accepts a `WithCommandAttributeDisabled`, 
+   so the caller can specify whether to opt-out of tracing the mongo command. (#712)
+- Upgrade to v0.20.0 of `go.opentelemetry.io/otel`. (#758)
+- The B3 and Jaeger propagators now store their debug or deferred state in the context.Context instead of the SpanContext. (#758)
+
+## [0.19.0] - 2021-03-19
+
+### Changed
+
+- Upgrade to v0.19.0 of `go.opentelemetry.io/otel`.
+- Fix Span names created in HTTP Instrumentation package to conform with guidelines. (#757)
+
+## [0.18.0] - 2021-03-04
+
+### Fixed
+
+- `otelmemcache` no longer sets span status to OK instead of leaving it unset. (#477)
+- Fix goroutine leak in gRPC `StreamClientInterceptor`. (#581)
+
+### Removed
+
+- Remove service name from `otelmemcache` configuration and span attributes. (#477)
+
+## [0.17.0] - 2021-02-15
+
+### Added
+
+- Add `ot-tracer` propagator (#562)
+
+### Changed
+
+- Rename project default branch from `master` to `main`.
+
+### Fixed
+
+- Added failure message for AWS ECS resource detector for better debugging (#568)
+- Goroutine leak in gRPC StreamClientInterceptor while streamer returns an error. (#581)
+
+## [0.16.0] - 2021-01-13
+
+### Fixed
+
+- Fix module path for AWS ECS resource detector (#517)
+
+## [0.15.1] - 2020-12-14
+
+### Added
+
+- Add registry link check to `Makefile` and pre-release script. (#446)
+- A new AWS X-Ray ID Generator (#459)
+- Migrate CircleCI jobs to GitHub Actions (#476)
+- Add CodeQL GitHub Action (#506)
+- Add gosec workflow to GitHub Actions (#507)
+
+### Fixed
+
+- Fixes the body replacement in otelhttp to not to mutate a nil body. (#484)
+
+## [0.15.0] - 2020-12-11
+
+### Added
+
+- A new Amazon EKS resource detector. (#465)
+- A new `gcp.CloudRun` detector for detecting resource from a Cloud Run instance. (#455)
+
+## [0.14.0] - 2020-11-20
+
+### Added
+
+- `otelhttp.{Get,Head,Post,PostForm}` convenience wrappers for their `http` counterparts. (#390)
+- The AWS detector now adds the cloud zone, host image ID, host type, and host name to the returned `Resource`. (#410)
+- Add Amazon ECS Resource Detector for AWS X-Ray. (#466)
+- Add propagator for AWS X-Ray (#462)
+
+### Changed
+
+- Add semantic version to `Tracer` / `Meter` created by instrumentation packages `otelsaram`, `otelrestful`, `otelmongo`, `otelhttp` and `otelhttptrace`. (#412)
+- Update instrumentation guidelines about tracer / meter semantic version. (#412)
+- Replace internal tracer and meter helpers by helpers from `go.opentelemetry.io/otel`. (#414)
+- gRPC instrumentation sets span attribute `rpc.grpc.status_code`. (#453)
+
+## Fixed
+
+- `/detectors/aws` no longer fails if instance metadata is not available (e.g. not running in AWS) (#401)
+- The AWS detector now returns a partial resource and an appropriate error if it encounters an error part way through determining a `Resource` identity. (#410)
+- The `host` instrumentation unit test has been updated to not depend on the system it runs on. (#426)
+
+## [0.13.0] - 2020-10-09
+
+## Added
+
+- A Jaeger propagator. (#375)
+
+## Changed
+
+- The `go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc` package instrumentation no longer accepts a `Tracer` as an argument to the interceptor function.
+   Instead, a new `WithTracerProvider` option is added to configure the `TracerProvider` used when creating the `Tracer` for the instrumentation. (#373)
+- The `go.opentelemetry.io/contrib/instrumentation/gopkg.in/macaron.v1/otelmacaron` instrumentation now accepts a `TracerProvider` rather than a `Tracer`. (#374)
+- Remove `go.opentelemetry.io/otel/sdk` dependency from instrumentation. (#381)
+- Use `httpsnoop` in `go.opentelemetry.io/contrib/instrumentation/github.com/gorilla/mux/otelmux` to ensure `http.ResponseWriter` additional interfaces are preserved. (#388)
+
+### Fixed
+
+- The `go.opentelemetry.io/contrib/instrumentation/github.com/labstack/echo/otelecho.Middleware` no longer sends duplicate errors to the global `ErrorHandler`. (#377, #364)
+- The import comment in `go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp` is now correctly quoted. (#379)
+- The B3 propagator sets the sample bitmask when the sampling decision is `debug`. (#369)
+
+## [0.12.0] - 2020-09-25
+
+### Changed
+
+- Replace `WithTracer` with `WithTracerProvider` in the `go.opentelemetry.io/contrib/instrumentation/gopkg.in/macaron.v1/otelmacaron` instrumentation. (#374)
+
+### Added
+
+- Benchmark tests for the gRPC instrumentation. (#296)
+- Integration testing for the gRPC instrumentation. (#297)
+- Allow custom labels to be added to net/http metrics. (#306)
+- Added B3 propagator, moving it out of open.telemetry.io/otel repo. (#344)
+
+### Changed
+
+- Unify instrumentation about provider options for `go.mongodb.org/mongo-driver`, `gin-gonic/gin`, `gorilla/mux`,
+  `labstack/echo`, `emicklei/go-restful`, `bradfitz/gomemcache`, `Shopify/sarama`, `net/http` and `beego`. (#303)
+- Update instrumentation guidelines about uniform provider options. Also, update style guide. (#303)
+- Make config struct of instrumentation unexported. (#303)
+- Instrumentations have been updated to adhere to the [configuration style guide's](https://github.com/open-telemetry/opentelemetry-go/blob/master/CONTRIBUTING.md#config)
+   updated recommendation to use `newConfig()` instead of `configure()`. (#336)
+- A new instrumentation naming scheme is implemented to avoid package name conflicts for instrumented packages while still remaining discoverable. (#359)
+  - `google.golang.org/grpc` -> `google.golang.org/grpc/otelgrpc`
+  - `go.mongodb.org/mongo-driver` -> `go.mongodb.org/mongo-driver/mongo/otelmongo`
+  - `net/http` -> `net/http/otelhttp`
+  - `net/http/httptrace` -> `net/http/httptrace/otelhttptrace`
+  - `github.com/labstack/echo` -> `github.com/labstack/echo/otelecho`
+  - `github.com/bradfitz/gomemcache` -> `github.com/bradfitz/gomemcache/memcache/otelmemcache`
+  - `github.com/gin-gonic/gin` -> `github.com/gin-gonic/gin/otelgin`
+  - `github.com/gocql/gocql` -> `github.com/gocql/gocql/otelgocql`
+  - `github.com/emicklei/go-restful` -> `github.com/emicklei/go-restful/otelrestful`
+  - `github.com/Shopify/sarama` -> `github.com/Shopify/sarama/otelsarama`
+  - `github.com/gorilla/mux` -> `github.com/gorilla/mux/otelmux`
+  - `github.com/astaxie/beego` -> `github.com/astaxie/beego/otelbeego`
+  - `gopkg.in/macaron.v1` -> `gopkg.in/macaron.v1/otelmacaron`
+- Rename `OTelBeegoHandler` to `Handler` in the `go.opentelemetry.io/contrib/instrumentation/github.com/astaxie/beego/otelbeego` package. (#359)
+
+## [0.11.0] - 2020-08-25
+
+### Added
+
+- Top-level `Version()` and `SemVersion()` functions defining the current version of the contrib package. (#225)
+- Instrumentation for the `github.com/astaxie/beego` package. (#200)
+- Instrumentation for the `github.com/bradfitz/gomemcache` package. (#204)
+- Host metrics instrumentation. (#231)
+- Cortex histogram and distribution support. (#237)
+- Cortex example project. (#238)
+- Cortex HTTP authentication. (#246)
+
+### Changed
+
+- Remove service name as a parameter of Sarama instrumentation. (#221)
+- Replace `WithTracer` with `WithTracerProvider` in Sarama instrumentation. (#221)
+- Switch to use common top-level module `SemVersion()` when creating versioned tracer in `bradfitz/gomemcache`. (#226)
+- Use `IntegrationShouldRun` in `gomemcache_test`. (#254)
+- Use Go 1.15 for CI builds. (#236)
+- Improved configuration for `runtime` instrumentation. (#224)
+
+### Fixed
+
+- Update dependabot configuration to include newly added `bradfitz/gomemcache` package. (#226)
+- Correct `runtime` instrumentation name. (#241)
+
+## [0.10.1] - 2020-08-13
+
+### Added
+
+- The `go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc` module has been added to replace the instrumentation that had previoiusly existed in the `go.opentelemetry.io/otel/instrumentation/grpctrace` package. (#189)
+- Instrumentation for the stdlib `net/http` and `net/http/httptrace` packages. (#190)
+- Initial Cortex exporter. (#202, #205, #210, #211, #215)
+
+### Fixed
+
+- Bump google.golang.org/grpc from 1.30.0 to 1.31.0. (#166)
+- Bump go.mongodb.org/mongo-driver from 1.3.5 to 1.4.0 in /instrumentation/go.mongodb.org/mongo-driver. (#170)
+- Bump google.golang.org/grpc in /instrumentation/github.com/gin-gonic/gin. (#173)
+- Bump google.golang.org/grpc in /instrumentation/github.com/labstack/echo. (#176)
+- Bump google.golang.org/grpc from 1.30.0 to 1.31.0 in /instrumentation/github.com/Shopify/sarama. (#179)
+- Bump cloud.google.com/go from 0.61.0 to 0.63.0 in /detectors/gcp. (#181, #199)
+- Bump github.com/aws/aws-sdk-go from 1.33.15 to 1.34.1 in /detectors/aws. (#184, #192, #193, #198, #201, #203)
+- Bump github.com/golangci/golangci-lint from 1.29.0 to 1.30.0 in /tools. (#186)
+- Setup CI to run tests that require external resources (Cassandra and MongoDB). (#191)
+- Bump github.com/Shopify/sarama from 1.26.4 to 1.27.0 in /instrumentation/github.com/Shopify/sarama. (#206)
+
+## [0.10.0] - 2020-07-31
+
+This release upgrades its [go.opentelemetry.io/otel](https://github.com/open-telemetry/opentelemetry-go/releases/tag/v0.10.0) dependency to v0.10.0 and includes new instrumentation for popular Kafka and Cassandra clients.
+
+### Added
+
+- A detector that generate resources from GCE instance. (#132)
+- A detector that generate resources from AWS instances. (#139)
+- Instrumentation for the Kafka client github.com/Shopify/sarama. (#134, #153)
+- Links and status message for mock span in the internal testing library. (#134)
+- Instrumentation for the Cassandra client github.com/gocql/gocql. (#137)
+- A detector that generate resources from GKE clusters. (#154)
+
+### Fixed
+
+- Bump github.com/aws/aws-sdk-go from 1.33.8 to 1.33.15 in /detectors/aws. (#155, #157, #159, #162)
+- Bump github.com/golangci/golangci-lint from 1.28.3 to 1.29.0 in /tools. (#146)
+
+## [0.9.0] - 2020-07-20
+
+This release upgrades its [go.opentelemetry.io/otel](https://github.com/open-telemetry/opentelemetry-go/releases/tag/v0.9.0) dependency to v0.9.0.
+
+### Fixed
+
+- Bump github.com/emicklei/go-restful/v3 from 3.0.0 to 3.2.0 in /instrumentation/github.com/emicklei/go-restful. (#133)
+- Update dependabot configuration to correctly check all included packages. (#131)
+- Update `RELEASING.md` with correct `tag.sh` command. (#130)
+
+## [0.8.0] - 2020-07-10
+
+This release upgrades its [go.opentelemetry.io/otel](https://github.com/open-telemetry/opentelemetry-go/releases/tag/v0.8.0) dependency to v0.8.0, includes minor fixes, and new instrumentation.
+
+### Added
+
+- Create this `CHANGELOG.md`. (#114)
+- Add `emicklei/go-restful/v3` trace instrumentation. (#115)
+
+### Changed
+
+- Update `CONTRIBUTING.md` to ask for updates to `CHANGELOG.md` with each pull request. (#114)
+- Move all `github.com` package instrumentation under a `github.com` directory. (#118)
+
+### Fixed
+
+- Update README to include information about external instrumentation.
+   To start, this includes native instrumentation found in the `go-redis/redis` package. (#117)
+- Bump github.com/golangci/golangci-lint from 1.27.0 to 1.28.2 in /tools. (#122, #123, #125)
+- Bump go.mongodb.org/mongo-driver from 1.3.4 to 1.3.5 in /instrumentation/go.mongodb.org/mongo-driver. (#124)
+
+## [0.7.0] - 2020-06-29
+
+This release upgrades its [go.opentelemetry.io/otel](https://github.com/open-telemetry/opentelemetry-go/releases/tag/v0.7.0) dependency to v0.7.0.
+
+### Added
+
+- Create `RELEASING.md` instructions. (#101)
+- Apply transitive dependabot go.mod updates as part of a new automatic Github workflow. (#94)
+- New dependabot integration to automate package upgrades. (#61)
+- Add automatic tag generation script for release. (#60)
+
+### Changed
+
+- Upgrade Datadog metrics exporter to include Resource tags. (#46)
+- Added output validation to Datadog example. (#96)
+- Move Macaron package to match layout guidelines. (#92)
+- Update top-level README and instrumentation README. (#92)
+- Bump google.golang.org/grpc from 1.29.1 to 1.30.0. (#99)
+- Bump github.com/golangci/golangci-lint from 1.21.0 to 1.27.0 in /tools. (#77)
+- Bump go.mongodb.org/mongo-driver from 1.3.2 to 1.3.4 in /instrumentation/go.mongodb.org/mongo-driver. (#76)
+- Bump github.com/stretchr/testify from 1.5.1 to 1.6.1. (#74)
+- Bump gopkg.in/macaron.v1 from 1.3.5 to 1.3.9 in /instrumentation/macaron. (#68)
+- Bump github.com/gin-gonic/gin from 1.6.2 to 1.6.3 in /instrumentation/gin-gonic/gin. (#73)
+- Bump github.com/DataDog/datadog-go from 3.5.0+incompatible to 3.7.2+incompatible in /exporters/metric/datadog. (#78)
+- Replaced `internal/trace/http.go` helpers with `api/standard` helpers from otel-go repo. (#112)
+
+## [0.6.1] - 2020-06-08
+
+First official tagged release of `contrib` repository.
+
+### Added
+
+- `labstack/echo` trace instrumentation (#42)
+- `mongodb` trace instrumentation (#26)
+- Go Runtime metrics (#9)
+- `gorilla/mux` trace instrumentation (#19)
+- `gin-gonic` trace instrumentation (#15)
+- `macaron` trace instrumentation (#20)
+- `dogstatsd` metrics exporter (#10)
+- `datadog` metrics exporter (#22)
+- Tags to all modules in repository
+- Repository folder structure and automated build (#3)
+
+### Changes
+
+- Prefix support for dogstatsd (#34)
+- Update Go Runtime package to use batch observer (#44)
+
+[Unreleased]: https://github.com/open-telemetry/opentelemetry-go-contrib/compare/v0.21.0...HEAD
+[0.21.0]: https://github.com/open-telemetry/opentelemetry-go-contrib/releases/tag/v0.21.0
+[0.20.0]: https://github.com/open-telemetry/opentelemetry-go-contrib/releases/tag/v0.20.0
+[0.19.0]: https://github.com/open-telemetry/opentelemetry-go-contrib/releases/tag/v0.19.0
+[0.18.0]: https://github.com/open-telemetry/opentelemetry-go-contrib/releases/tag/v0.18.0
+[0.17.0]: https://github.com/open-telemetry/opentelemetry-go-contrib/releases/tag/v0.17.0
+[0.16.0]: https://github.com/open-telemetry/opentelemetry-go-contrib/releases/tag/v0.16.0
+[0.15.1]: https://github.com/open-telemetry/opentelemetry-go-contrib/releases/tag/v0.15.1
+[0.15.0]: https://github.com/open-telemetry/opentelemetry-go-contrib/releases/tag/v0.15.0
+[0.14.0]: https://github.com/open-telemetry/opentelemetry-go-contrib/releases/tag/v0.14.0
+[0.13.0]: https://github.com/open-telemetry/opentelemetry-go-contrib/releases/tag/v0.13.0
+[0.12.0]: https://github.com/open-telemetry/opentelemetry-go-contrib/releases/tag/v0.12.0
+[0.11.0]: https://github.com/open-telemetry/opentelemetry-go-contrib/releases/tag/v0.11.0
+[0.10.1]: https://github.com/open-telemetry/opentelemetry-go-contrib/releases/tag/v0.10.1
+[0.10.0]: https://github.com/open-telemetry/opentelemetry-go-contrib/releases/tag/v0.10.0
+[0.9.0]: https://github.com/open-telemetry/opentelemetry-go-contrib/releases/tag/v0.9.0
+[0.8.0]: https://github.com/open-telemetry/opentelemetry-go-contrib/releases/tag/v0.8.0
+[0.7.0]: https://github.com/open-telemetry/opentelemetry-go-contrib/releases/tag/v0.7.0
+[0.6.1]: https://github.com/open-telemetry/opentelemetry-go-contrib/releases/tag/v0.6.1
diff --git a/vendor/go.opentelemetry.io/contrib/CODEOWNERS b/vendor/go.opentelemetry.io/contrib/CODEOWNERS
new file mode 100644
index 000000000..0fa3b2c4a
--- /dev/null
+++ b/vendor/go.opentelemetry.io/contrib/CODEOWNERS
@@ -0,0 +1,17 @@
+#####################################################
+#
+# List of approvers for this repository
+#
+#####################################################
+#
+# Learn about membership in OpenTelemetry community:
+#  https://github.com/open-telemetry/community/blob/main/community-membership.md
+#
+#
+# Learn about CODEOWNERS file format:
+#  https://help.github.com/en/articles/about-code-owners
+#
+
+* @jmacd @MrAlias @Aneurysm9 @evantorrie @XSAM @dashpole @paivagustavo @MadVikingGod
+
+CODEOWNERS @MrAlias @Aneurysm9
diff --git a/vendor/go.opentelemetry.io/contrib/CONTRIBUTING.md b/vendor/go.opentelemetry.io/contrib/CONTRIBUTING.md
new file mode 100644
index 000000000..7165e8279
--- /dev/null
+++ b/vendor/go.opentelemetry.io/contrib/CONTRIBUTING.md
@@ -0,0 +1,136 @@
+# Contributing to opentelemetry-go-contrib
+
+The Go special interest group (SIG) meets regularly. See the
+OpenTelemetry
+[community](https://github.com/open-telemetry/community#golang-sdk)
+repo for information on this and other language SIGs.
+
+See the [public meeting
+notes](https://docs.google.com/document/d/1A63zSWX0x2CyCK_LoNhmQC4rqhLpYXJzXbEPDUQ2n6w/edit#heading=h.9tngw7jdwd6b)
+for a summary description of past meetings. To request edit access,
+join the meeting or get in touch on
+[Slack](https://cloud-native.slack.com/archives/C01NPAXACKT).
+
+## Development
+
+There are some generated files checked into the repo. To make sure
+that the generated files are up-to-date, run `make` (or `make
+precommit` - the `precommit` target is the default).
+
+The `precommit` target also fixes the formatting of the code and
+checks the status of the go module files.
+
+If after running `make precommit` the output of `git status` contains
+`nothing to commit, working tree clean` then it means that everything
+is up-to-date and properly formatted.
+
+## Pull Requests
+
+### How to Send Pull Requests
+
+Everyone is welcome to contribute code to `opentelemetry-go-contrib` via
+GitHub pull requests (PRs).
+
+To create a new PR, fork the project in GitHub and clone the upstream
+repo:
+
+```sh
+$ git clone https://github.com/open-telemetry/opentelemetry-go-contrib
+```
+This would put the project in the `opentelemetry-go-contrib` directory in
+current working directory.
+
+Enter the newly created directory and add your fork as a new remote:
+
+```sh
+$ git remote add <YOUR_FORK> git@github.com:<YOUR_GITHUB_USERNAME>/opentelemetry-go
+```
+
+Check out a new branch, make modifications, run linters and tests, update
+`CHANGELOG.md` and push the branch to your fork:
+
+```sh
+$ git checkout -b <YOUR_BRANCH_NAME>
+# edit files
+# update changelog
+$ make precommit
+$ git add -p
+$ git commit
+$ git push <YOUR_FORK> <YOUR_BRANCH_NAME>
+```
+
+Open a pull request against the main `opentelemetry-go-contrib` repo. Be sure to add the pull
+request ID to the entry you added to `CHANGELOG.md`.
+
+### How to Receive Comments
+
+* If the PR is not ready for review, please put `[WIP]` in the title,
+  tag it as `work-in-progress`, or mark it as
+  [`draft`](https://github.blog/2019-02-14-introducing-draft-pull-requests/).
+* Make sure CLA is signed and CI is clear.
+
+### How to Get PRs Merged
+
+A PR is considered to be **ready to merge** when:
+
+* It has received two approvals from Approvers/Maintainers (at
+  different companies).
+* Feedback has been addressed.
+* Any substantive changes to your PR will require that you clear any prior
+  Approval reviews, this includes changes resulting from other feedback. Unless
+  the approver explicitly stated that their approval will persist across
+  changes it should be assumed that the PR needs their review again. Other
+  project members (e.g. approvers, maintainers) can help with this if there are
+  any questions or if you forget to clear reviews.
+* It has been open for review for at least one working day. This gives
+  people reasonable time to review.
+* Trivial change (typo, cosmetic, doc, etc.) doesn't have to wait for
+  one day.
+* `CHANGELOG.md` has been updated to reflect what has been
+  added, changed, removed, or fixed.
+* Urgent fix can take exception as long as it has been actively
+  communicated.
+
+Any Maintainer can merge the PR once it is **ready to merge**.
+
+## Style Guide
+
+* Make sure to run `make precommit` - this will find and fix the code
+  formatting.
+* Check [opentelemetry-go Style Guide](https://github.com/open-telemetry/opentelemetry-go/blob/main/CONTRIBUTING.md#style-guide)
+
+## Adding a new Contrib package
+
+To add a new contrib package follow an existing one. An empty Sample instrumentation
+provides base structure with an example and a test. Each contrib package 
+should be its own module. A contrib package may contain more than one go package.
+
+### Folder Structure
+- instrumentation/\<instrumentation-package>  (**Common**)
+- instrumentation/\<instrumentation-package>/trace (**specific to trace**)
+- instrumentation/\<instrumentation-package>/metrics (**specific to metrics**)
+
+#### Example
+- instrumentation/gorm/trace
+- instrumentation/kafka/metrics
+
+## Approvers and Maintainers
+
+Approvers:
+
+- [Evan Torrie](https://github.com/evantorrie), Verizon Media
+- [Josh MacDonald](https://github.com/jmacd), LightStep
+- [Sam Xie](https://github.com/XSAM)
+- [David Ashpole](https://github.com/dashpole), Google
+- [Gustavo Silva Paiva](https://github.com/paivagustavo), LightStep
+- [Aaron Clawson](https://github.com/MadVikingGod)
+
+Maintainers:
+
+- [Anthony Mirabella](https://github.com/Aneurysm9), Centene
+- [Tyler Yahn](https://github.com/MrAlias), New Relic
+
+### Become an Approver or a Maintainer
+
+See the [community membership document in OpenTelemetry community
+repo](https://github.com/open-telemetry/community/blob/main/community-membership.md).
diff --git a/vendor/go.opentelemetry.io/contrib/LICENSE b/vendor/go.opentelemetry.io/contrib/LICENSE
new file mode 100644
index 000000000..261eeb9e9
--- /dev/null
+++ b/vendor/go.opentelemetry.io/contrib/LICENSE
@@ -0,0 +1,201 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
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diff --git a/vendor/go.opentelemetry.io/contrib/Makefile b/vendor/go.opentelemetry.io/contrib/Makefile
new file mode 100644
index 000000000..4ad59562c
--- /dev/null
+++ b/vendor/go.opentelemetry.io/contrib/Makefile
@@ -0,0 +1,203 @@
+TOOLS_MOD_DIR := ./tools
+
+# All source code and documents. Used in spell check.
+ALL_DOCS := $(shell find . -name '*.md' -type f | sort)
+# All directories with go.mod files related to opentelemetry library. Used for building, testing and linting.
+ALL_GO_MOD_DIRS := $(filter-out $(TOOLS_MOD_DIR), $(shell find . -type f -name 'go.mod' -exec dirname {} \; | sort))
+ALL_COVERAGE_MOD_DIRS := $(shell find . -type f -name 'go.mod' -exec dirname {} \; | egrep -v '^./example|^$(TOOLS_MOD_DIR)' | sort)
+
+# URLs to check if all contrib entries exist in the registry.
+REGISTRY_BASE_URL = https://raw.githubusercontent.com/open-telemetry/opentelemetry.io/main/content/en/registry
+CONTRIB_REPO_URL = https://github.com/open-telemetry/opentelemetry-go-contrib/tree/main
+
+# Mac OS Catalina 10.5.x doesn't support 386. Hence skip 386 test
+SKIP_386_TEST = false
+UNAME_S := $(shell uname -s)
+ifeq ($(UNAME_S),Darwin)
+	SW_VERS := $(shell sw_vers -productVersion)
+	ifeq ($(shell echo $(SW_VERS) | egrep '^(10.1[5-9]|1[1-9]|[2-9])'), $(SW_VERS))
+		SKIP_386_TEST = true
+	endif
+endif
+
+
+GOTEST_MIN = go test -v -timeout 30s
+GOTEST = $(GOTEST_MIN) -race
+GOTEST_WITH_COVERAGE = $(GOTEST) -coverprofile=coverage.out -covermode=atomic -coverpkg=./...
+
+.DEFAULT_GOAL := precommit
+
+.PHONY: precommit
+
+TOOLS_DIR := $(abspath ./.tools)
+
+$(TOOLS_DIR)/golangci-lint: $(TOOLS_MOD_DIR)/go.mod $(TOOLS_MOD_DIR)/go.sum $(TOOLS_MOD_DIR)/tools.go
+	cd $(TOOLS_MOD_DIR) && \
+	go build -o $(TOOLS_DIR)/golangci-lint github.com/golangci/golangci-lint/cmd/golangci-lint
+
+$(TOOLS_DIR)/misspell: $(TOOLS_MOD_DIR)/go.mod $(TOOLS_MOD_DIR)/go.sum $(TOOLS_MOD_DIR)/tools.go
+	cd $(TOOLS_MOD_DIR) && \
+	go build -o $(TOOLS_DIR)/misspell github.com/client9/misspell/cmd/misspell
+
+$(TOOLS_DIR)/stringer: $(TOOLS_MOD_DIR)/go.mod $(TOOLS_MOD_DIR)/go.sum $(TOOLS_MOD_DIR)/tools.go
+	cd $(TOOLS_MOD_DIR) && \
+	go build -o $(TOOLS_DIR)/stringer golang.org/x/tools/cmd/stringer
+
+precommit: dependabot-check license-check generate build lint test
+
+.PHONY: test-with-coverage
+test-with-coverage:
+	set -e; \
+	printf "" > coverage.txt; \
+	for dir in $(ALL_COVERAGE_MOD_DIRS); do \
+	  echo "go test ./... + coverage in $${dir}"; \
+	  (cd "$${dir}" && \
+	    $(GOTEST_WITH_COVERAGE) ./... && \
+	    go tool cover -html=coverage.out -o coverage.html); \
+	  [ -f "$${dir}/coverage.out" ] && cat "$${dir}/coverage.out" >> coverage.txt; \
+	done; \
+	sed -i.bak -e '2,$$ { /^mode: /d; }' coverage.txt && rm coverage.txt.bak
+
+.PHONY: ci
+ci: precommit check-clean-work-tree test-with-coverage test-386
+
+.PHONY: test-gocql
+test-gocql:
+	@if ./tools/should_build.sh gocql; then \
+	  set -e; \
+	  docker run --name cass-integ --rm -p 9042:9042 -d cassandra:3; \
+	  CMD=cassandra IMG_NAME=cass-integ ./tools/wait.sh; \
+	  (cd instrumentation/github.com/gocql/gocql/otelgocql && \
+	    $(GOTEST_WITH_COVERAGE) . && \
+	    go tool cover -html=coverage.out -o coverage.html); \
+	  docker stop cass-integ; \
+	fi
+
+.PHONY: test-mongo-driver
+test-mongo-driver:
+	@if ./tools/should_build.sh mongo-driver; then \
+	  set -e; \
+	  docker run --name mongo-integ --rm -p 27017:27017 -d mongo; \
+	  CMD=mongo IMG_NAME=mongo-integ ./tools/wait.sh; \
+	  (cd instrumentation/go.mongodb.org/mongo-driver/mongo/otelmongo && \
+	    $(GOTEST_WITH_COVERAGE) . && \
+	    go tool cover -html=coverage.out -o coverage.html); \
+	  docker stop mongo-integ; \
+	fi
+
+.PHONY: test-gomemcache
+test-gomemcache:
+	@if ./tools/should_build.sh gomemcache; then \
+	  set -e; \
+	  docker run --name gomemcache-integ --rm -p 11211:11211 -d memcached; \
+	  CMD=gomemcache IMG_NAME=gomemcache-integ  ./tools/wait.sh; \
+	  (cd instrumentation/github.com/bradfitz/gomemcache/memcache/otelmemcache && \
+	    $(GOTEST_WITH_COVERAGE) . && \
+	    go tool cover -html=coverage.out -o coverage.html); \
+	  docker stop gomemcache-integ ; \
+	fi
+
+.PHONY: check-clean-work-tree
+check-clean-work-tree:
+	@if ! git diff --quiet; then \
+	  echo; \
+	  echo 'Working tree is not clean, did you forget to run "make precommit"?'; \
+	  echo; \
+	  git status; \
+	  exit 1; \
+	fi
+
+.PHONY: build
+build:
+	# TODO: Fix this on windows.
+	set -e; for dir in $(ALL_GO_MOD_DIRS); do \
+	  echo "compiling all packages in $${dir}"; \
+	  (cd "$${dir}" && \
+	    go build ./... && \
+	    go test -run xxxxxMatchNothingxxxxx ./... >/dev/null); \
+	done
+
+.PHONY: test
+test:
+	set -e; for dir in $(ALL_GO_MOD_DIRS); do \
+	  echo "go test ./... + race in $${dir}"; \
+	  (cd "$${dir}" && \
+	    $(GOTEST) ./...); \
+	done
+
+.PHONY: test-386
+test-386:
+	if [ $(SKIP_386_TEST) = true ] ; then \
+		echo "skipping the test for GOARCH 386 as it is not supported on the current OS"; \
+  else \
+    set -e; for dir in $(ALL_GO_MOD_DIRS); do \
+        echo "go test ./... GOARCH 386 in $${dir}"; \
+        (cd "$${dir}" && \
+          GOARCH=386 $(GOTEST_MIN) ./...); \
+	  done; \
+	fi
+
+.PHONY: lint
+lint: $(TOOLS_DIR)/golangci-lint $(TOOLS_DIR)/misspell
+	set -e; for dir in $(ALL_GO_MOD_DIRS); do \
+	  echo "golangci-lint in $${dir}"; \
+	  (cd "$${dir}" && \
+	    $(TOOLS_DIR)/golangci-lint run --fix && \
+	    $(TOOLS_DIR)/golangci-lint run); \
+	done
+	$(TOOLS_DIR)/misspell -w $(ALL_DOCS)
+	set -e; for dir in $(ALL_GO_MOD_DIRS) $(TOOLS_MOD_DIR); do \
+	  echo "go mod tidy in $${dir}"; \
+	  (cd "$${dir}" && \
+	    go mod tidy); \
+	done
+
+.PHONY: generate
+generate: $(TOOLS_DIR)/stringer
+	PATH="$(TOOLS_DIR):$${PATH}" go generate ./...
+
+.PHONY: license-check
+license-check:
+	@licRes=$$(for f in $$(find . -type f \( -iname '*.go' -o -iname '*.sh' \) ! -path './vendor/*' ! -path './exporters/otlp/internal/opentelemetry-proto/*') ; do \
+	           awk '/Copyright The OpenTelemetry Authors|generated|GENERATED/ && NR<=3 { found=1; next } END { if (!found) print FILENAME }' $$f; \
+	   done); \
+	   if [ -n "$${licRes}" ]; then \
+	           echo "license header checking failed:"; echo "$${licRes}"; \
+	           exit 1; \
+	   fi
+
+.PHONY: registry-links-check
+registry-links-check:
+	@checkRes=$$( \
+		for f in $$( find ./instrumentation ./exporters ./detectors ! -path './instrumentation/net/*' -type f -name 'go.mod' -exec dirname {} \; | egrep -v '/example|/utils' | sort ) \
+			./instrumentation/net/http; do \
+			TYPE="instrumentation"; \
+			if $$(echo "$$f" | grep -q "exporters"); then \
+				TYPE="exporter"; \
+			fi; \
+			if $$(echo "$$f" | grep -q "detectors"); then \
+				TYPE="detector"; \
+			fi; \
+			NAME=$$(echo "$$f" | sed -e 's/.*\///' -e 's/.*otel//'); \
+			LINK=$(CONTRIB_REPO_URL)/$$(echo "$$f" | sed -e 's/..//' -e 's/\/otel.*$$//'); \
+			if ! $$(curl -s $(REGISTRY_BASE_URL)/$${TYPE}-go-$${NAME}.md | grep -q "$${LINK}"); then \
+				echo "$$f"; \
+			fi \
+		done; \
+	); \
+	if [ -n "$$checkRes" ]; then \
+		echo "WARNING: registry link check failed for the following packages:"; echo "$${checkRes}"; \
+	fi
+
+.PHONY: dependabot-check
+dependabot-check:
+	@result=$$( \
+		for f in $$( find . -type f -name go.mod -exec dirname {} \; | sed 's/^.\/\?/\//' ); \
+			do grep -q "$$f" .github/dependabot.yml \
+			|| echo "$$f"; \
+		done; \
+	); \
+	if [ -n "$$result" ]; then \
+		echo "missing go.mod dependabot check:"; echo "$$result"; \
+		exit 1; \
+	fi
diff --git a/vendor/go.opentelemetry.io/contrib/README.md b/vendor/go.opentelemetry.io/contrib/README.md
new file mode 100644
index 000000000..5bc581352
--- /dev/null
+++ b/vendor/go.opentelemetry.io/contrib/README.md
@@ -0,0 +1,40 @@
+# OpenTelemetry-Go Contrib
+
+[![build_and_test](https://github.com/open-telemetry/opentelemetry-go-contrib/workflows/build_and_test/badge.svg)](https://github.com/open-telemetry/opentelemetry-go-contrib/actions?query=workflow%3Abuild_and_test+branch%3Amain)
+[![codecov.io](https://codecov.io/gh/open-telemetry/opentelemetry-go-contrib/coverage.svg?branch=main)](https://app.codecov.io/gh/open-telemetry/opentelemetry-go-contrib?branch=main)
+[![Docs](https://godoc.org/go.opentelemetry.io/contrib?status.svg)](https://pkg.go.dev/go.opentelemetry.io/contrib)
+[![Go Report Card](https://goreportcard.com/badge/go.opentelemetry.io/contrib)](https://goreportcard.com/report/go.opentelemetry.io/contrib)
+[![Slack](https://img.shields.io/badge/slack-@cncf/otel--go-brightgreen.svg?logo=slack)](https://cloud-native.slack.com/archives/C01NPAXACKT)
+
+Collection of 3rd-party instrumentation and exporters for [OpenTelemetry-Go](https://github.com/open-telemetry/opentelemetry-go).
+
+## Contents
+
+- [Instrumentation](./instrumentation/): Packages providing OpenTelemetry instrumentation for 3rd-party libraries.
+- [Exporters](./exporters/): Packages providing OpenTelemetry exporters for 3rd-party telemetry systems.
+- [Propagators](./propagators/): Packages providing OpenTelemetry context propagators for 3rd-party propagation formats.
+- [Detectors](./detectors/): Packages providing OpenTelemetry resource detectors for 3rd-party cloud computing environments.
+
+## Project Status
+
+This project is currently in a pre-GA phase. Our progress towards a GA release
+candidate is tracked in [this project
+board](https://github.com/orgs/open-telemetry/projects/5).
+
+### Compatibility
+
+This project is tested on the following systems.
+
+| OS      | Go Version | Architecture |
+| ------- | ---------- | ------------ |
+| Ubuntu  | 1.16       | amd64        |
+| Ubuntu  | 1.15       | amd64        |
+| Ubuntu  | 1.16       | 386          |
+| Ubuntu  | 1.15       | 386          |
+
+While this project should work for other systems, no compatibility guarantees
+are made for those systems currently.
+
+## Contributing
+
+For information on how to contribute, consult [the contributing guidelines](./CONTRIBUTING.md)
diff --git a/vendor/go.opentelemetry.io/contrib/RELEASING.md b/vendor/go.opentelemetry.io/contrib/RELEASING.md
new file mode 100644
index 000000000..f7fd359c4
--- /dev/null
+++ b/vendor/go.opentelemetry.io/contrib/RELEASING.md
@@ -0,0 +1,96 @@
+# Release Process
+
+There are two types of release for the `go.opentelemetry.io/contrib` repo
+and submodules.
+
+1. **Case 1** A release due to changes independent of the
+`go.opentelemetry.io/otel` module, e.g. perhaps a critical bug fix in
+one of the contrib modules.
+
+2. **Case 2** A release due to a breaking API change in
+`go.opentelemetry.io/otel` which all modules in this repo
+depend on.
+
+## Pre-Release
+
+Update go.mod for submodules to depend on the upcoming new release of
+the module in this repo, `go.opentelemetry.io/contrib`.  Decide on the
+next version of the semantic tag to apply to the contrib
+module based on whether you fall into Case 1 or Case 2.
+
+### Case 1
+
+If the changes are all internal to this repo, then the new tag will
+most often be a patch or minor version upgrade to the existing tag on
+this module. Let's call this `<new_contrib_tag>`.
+
+### Case 2
+
+If a new release is required due to breaking changes in
+`go.opentelemetry.io/otel`, then the new semantic tag for this repo
+should be bumped to match the `go.opentelemetry.io/otel` new tag.
+Let's call this `<new_otel_tag>`. The script checks that
+`go.opentelemetry.io/otel@v<new_otel_tag>` is a valid tag, so you need
+to wait until that tag has been pushed in the main repo.
+
+In nearly all cases, `<new_contrib_tag>` should be the same as
+`<new_otel_tag>`.
+
+1. Run `pre_release.sh` script to create a branch `pre_release_<new_contrib_tag>`.
+   The script will also run `go mod tidy` and `make ci`.
+
+   * **Case 1** `./pre_release.sh -t <new_contrib_tag>`
+   * **Case 2** `./pre_release.sh -o <new_otel_tag> [-t <new_contrib_tag>]`
+
+2. If you used `-o <new_otel_tag>` to rewrite the modules to depend on
+   a new version of `go.opentelemetry.io/otel`, there will likely be
+   breaking changes that require fixes to the files in this
+   `contrib` repo.  Make the appropriate fixes to address any API
+   breaks and run through the
+
+        ```
+        git commit -m "fixes due to API changes"
+        make precommit
+        ```
+
+   cycle until everything passes
+
+4. Push the changes to upstream.
+
+    ```
+    git diff main
+    git push
+    ```
+
+5. Create a PR on github and merge the PR once approved.
+
+
+### Tag
+Now create a `<new_contrib_tag>` on the commit hash of the changes made in pre-release step,
+
+1. Run the tag.sh script.
+
+    ```
+    ./tag.sh <new_contrib_tag> <commit-hash>
+    ```
+2. Push tags upstream. Make sure you push upstream for all the sub-module tags as well.
+
+    ```
+    git push upstream <new_contrib_tag>
+    git push upstream <submodules-path/new_contrib_tag>
+    ...
+    ```
+
+## Release
+Now create a release for the new `<new_contrib_tag>` on github.
+The release body should include all the release notes in the Changelog for this release.
+Additionally, the `tag.sh` script generates commit logs since last release which can be used to suppliment the release notes.
+
+<!-- ## Verify Examples -->
+<!-- After releasing run following script to verify that examples build outside of the otel repo. -->
+<!-- The script copies examples into a different directory and builds them. -->
+
+<!-- ``` -->
+<!-- ./verify_examples.sh -->
+<!-- ``` -->
+
diff --git a/vendor/go.opentelemetry.io/contrib/contrib.go b/vendor/go.opentelemetry.io/contrib/contrib.go
new file mode 100644
index 000000000..2d7247cb9
--- /dev/null
+++ b/vendor/go.opentelemetry.io/contrib/contrib.go
@@ -0,0 +1,28 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package contrib contains common values used across all
+// instrumentation, exporter, and detector contributions.
+package contrib // import "go.opentelemetry.io/contrib"
+
+// Version is the current release version of OpenTelemetry Contrib in use.
+func Version() string {
+	return "0.21.0"
+	// This string is updated by the pre_release.sh script during release
+}
+
+// SemVersion is the semantic version to be supplied to tracer/meter creation.
+func SemVersion() string {
+	return "semver:" + Version()
+}
diff --git a/vendor/go.opentelemetry.io/contrib/doc.go b/vendor/go.opentelemetry.io/contrib/doc.go
new file mode 100644
index 000000000..6c55ff6a2
--- /dev/null
+++ b/vendor/go.opentelemetry.io/contrib/doc.go
@@ -0,0 +1,20 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// This package provides all of its functionality through its
+// submodules. The submodules in the exporters directory provide
+// implementations for trace and metric exporters for third-party
+// collectors, and submodules in the instrumentation directory provide the
+// instrumentation for the popular go libraries.
+package contrib
diff --git a/vendor/go.opentelemetry.io/contrib/go.mod b/vendor/go.opentelemetry.io/contrib/go.mod
new file mode 100644
index 000000000..e59b22fa9
--- /dev/null
+++ b/vendor/go.opentelemetry.io/contrib/go.mod
@@ -0,0 +1,3 @@
+module go.opentelemetry.io/contrib
+
+go 1.15
diff --git a/vendor/go.opentelemetry.io/contrib/go.sum b/vendor/go.opentelemetry.io/contrib/go.sum
new file mode 100644
index 000000000..e69de29bb
diff --git a/vendor/go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc/LICENSE b/vendor/go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc/LICENSE
new file mode 100644
index 000000000..261eeb9e9
--- /dev/null
+++ b/vendor/go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc/LICENSE
@@ -0,0 +1,201 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
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+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
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+      direction or management of such entity, whether by contract or
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+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
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+      form, that is based on (or derived from) the Work and for which the
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+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
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+      to that Work or Derivative Works thereof, that is intentionally
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+      the conditions stated in this License.
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+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
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+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
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+      whether in tort (including negligence), contract, or otherwise,
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+      on Your own behalf and on Your sole responsibility, not on behalf
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+
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+
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+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
diff --git a/vendor/go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc/go.mod b/vendor/go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc/go.mod
new file mode 100644
index 000000000..7a0e7e338
--- /dev/null
+++ b/vendor/go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc/go.mod
@@ -0,0 +1,16 @@
+module go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc
+
+go 1.15
+
+replace go.opentelemetry.io/contrib => ../../../../
+
+require (
+	github.com/golang/protobuf v1.5.2
+	github.com/stretchr/testify v1.7.0
+	go.opentelemetry.io/contrib v0.21.0
+	go.opentelemetry.io/otel v1.0.0-RC1
+	go.opentelemetry.io/otel/oteltest v1.0.0-RC1
+	go.opentelemetry.io/otel/trace v1.0.0-RC1
+	go.uber.org/goleak v1.1.10
+	google.golang.org/grpc v1.38.0
+)
diff --git a/vendor/go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc/go.sum b/vendor/go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc/go.sum
new file mode 100644
index 000000000..ae370f589
--- /dev/null
+++ b/vendor/go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc/go.sum
@@ -0,0 +1,121 @@
+cloud.google.com/go v0.26.0 h1:e0WKqKTd5BnrG8aKH3J3h+QvEIQtSUcf2n5UZ5ZgLtQ=
+cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
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+go.uber.org/goleak v1.1.10 h1:z+mqJhf6ss6BSfSM671tgKyZBFPTTJM+HLxnhPC3wu0=
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diff --git a/vendor/go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc/grpctrace.go b/vendor/go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc/grpctrace.go
new file mode 100644
index 000000000..3575298cb
--- /dev/null
+++ b/vendor/go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc/grpctrace.go
@@ -0,0 +1,130 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package otelgrpc
+
+import (
+	"context"
+
+	"google.golang.org/grpc/metadata"
+
+	"go.opentelemetry.io/otel"
+	"go.opentelemetry.io/otel/attribute"
+	"go.opentelemetry.io/otel/baggage"
+	"go.opentelemetry.io/otel/propagation"
+	"go.opentelemetry.io/otel/trace"
+)
+
+const (
+	// instrumentationName is the name of this instrumentation package.
+	instrumentationName = "go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc"
+	// GRPCStatusCodeKey is convention for numeric status code of a gRPC request.
+	GRPCStatusCodeKey = attribute.Key("rpc.grpc.status_code")
+)
+
+// config is a group of options for this instrumentation.
+type config struct {
+	Propagators    propagation.TextMapPropagator
+	TracerProvider trace.TracerProvider
+}
+
+// Option applies an option value for a config.
+type Option interface {
+	Apply(*config)
+}
+
+// newConfig returns a config configured with all the passed Options.
+func newConfig(opts []Option) *config {
+	c := &config{
+		Propagators:    otel.GetTextMapPropagator(),
+		TracerProvider: otel.GetTracerProvider(),
+	}
+	for _, o := range opts {
+		o.Apply(c)
+	}
+	return c
+}
+
+type propagatorsOption struct{ p propagation.TextMapPropagator }
+
+func (o propagatorsOption) Apply(c *config) {
+	c.Propagators = o.p
+}
+
+// WithPropagators returns an Option to use the Propagators when extracting
+// and injecting trace context from requests.
+func WithPropagators(p propagation.TextMapPropagator) Option {
+	return propagatorsOption{p: p}
+}
+
+type tracerProviderOption struct{ tp trace.TracerProvider }
+
+func (o tracerProviderOption) Apply(c *config) {
+	c.TracerProvider = o.tp
+}
+
+// WithTracerProvider returns an Option to use the TracerProvider when
+// creating a Tracer.
+func WithTracerProvider(tp trace.TracerProvider) Option {
+	return tracerProviderOption{tp: tp}
+}
+
+type metadataSupplier struct {
+	metadata *metadata.MD
+}
+
+// assert that metadataSupplier implements the TextMapCarrier interface
+var _ propagation.TextMapCarrier = &metadataSupplier{}
+
+func (s *metadataSupplier) Get(key string) string {
+	values := s.metadata.Get(key)
+	if len(values) == 0 {
+		return ""
+	}
+	return values[0]
+}
+
+func (s *metadataSupplier) Set(key string, value string) {
+	s.metadata.Set(key, value)
+}
+
+func (s *metadataSupplier) Keys() []string {
+	out := make([]string, 0, len(*s.metadata))
+	for key := range *s.metadata {
+		out = append(out, key)
+	}
+	return out
+}
+
+// Inject injects correlation context and span context into the gRPC
+// metadata object. This function is meant to be used on outgoing
+// requests.
+func Inject(ctx context.Context, metadata *metadata.MD, opts ...Option) {
+	c := newConfig(opts)
+	c.Propagators.Inject(ctx, &metadataSupplier{
+		metadata: metadata,
+	})
+}
+
+// Extract returns the correlation context and span context that
+// another service encoded in the gRPC metadata object with Inject.
+// This function is meant to be used on incoming requests.
+func Extract(ctx context.Context, metadata *metadata.MD, opts ...Option) (baggage.Baggage, trace.SpanContext) {
+	c := newConfig(opts)
+	ctx = c.Propagators.Extract(ctx, &metadataSupplier{
+		metadata: metadata,
+	})
+
+	return baggage.FromContext(ctx), trace.SpanContextFromContext(ctx)
+}
diff --git a/vendor/go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc/interceptor.go b/vendor/go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc/interceptor.go
new file mode 100644
index 000000000..211749763
--- /dev/null
+++ b/vendor/go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc/interceptor.go
@@ -0,0 +1,499 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package otelgrpc
+
+// gRPC tracing middleware
+// https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/trace/semantic_conventions/rpc.md
+import (
+	"context"
+	"io"
+	"net"
+	"strings"
+
+	"github.com/golang/protobuf/proto" // nolint:staticcheck
+
+	"google.golang.org/grpc"
+	grpc_codes "google.golang.org/grpc/codes"
+	"google.golang.org/grpc/metadata"
+	"google.golang.org/grpc/peer"
+	"google.golang.org/grpc/status"
+
+	"go.opentelemetry.io/otel/attribute"
+	"go.opentelemetry.io/otel/baggage"
+	"go.opentelemetry.io/otel/codes"
+	semconv "go.opentelemetry.io/otel/semconv/v1.4.0"
+	"go.opentelemetry.io/otel/trace"
+
+	otelcontrib "go.opentelemetry.io/contrib"
+)
+
+type messageType attribute.KeyValue
+
+// Event adds an event of the messageType to the span associated with the
+// passed context with id and size (if message is a proto message).
+func (m messageType) Event(ctx context.Context, id int, message interface{}) {
+	span := trace.SpanFromContext(ctx)
+	if p, ok := message.(proto.Message); ok {
+		span.AddEvent("message", trace.WithAttributes(
+			attribute.KeyValue(m),
+			RPCMessageIDKey.Int(id),
+			RPCMessageUncompressedSizeKey.Int(proto.Size(p)),
+		))
+	} else {
+		span.AddEvent("message", trace.WithAttributes(
+			attribute.KeyValue(m),
+			RPCMessageIDKey.Int(id),
+		))
+	}
+}
+
+var (
+	messageSent     = messageType(RPCMessageTypeSent)
+	messageReceived = messageType(RPCMessageTypeReceived)
+)
+
+// UnaryClientInterceptor returns a grpc.UnaryClientInterceptor suitable
+// for use in a grpc.Dial call.
+func UnaryClientInterceptor(opts ...Option) grpc.UnaryClientInterceptor {
+	return func(
+		ctx context.Context,
+		method string,
+		req, reply interface{},
+		cc *grpc.ClientConn,
+		invoker grpc.UnaryInvoker,
+		callOpts ...grpc.CallOption,
+	) error {
+		requestMetadata, _ := metadata.FromOutgoingContext(ctx)
+		metadataCopy := requestMetadata.Copy()
+
+		tracer := newConfig(opts).TracerProvider.Tracer(
+			instrumentationName,
+			trace.WithInstrumentationVersion(otelcontrib.SemVersion()),
+		)
+
+		name, attr := spanInfo(method, cc.Target())
+		var span trace.Span
+		ctx, span = tracer.Start(
+			ctx,
+			name,
+			trace.WithSpanKind(trace.SpanKindClient),
+			trace.WithAttributes(attr...),
+		)
+		defer span.End()
+
+		Inject(ctx, &metadataCopy, opts...)
+		ctx = metadata.NewOutgoingContext(ctx, metadataCopy)
+
+		messageSent.Event(ctx, 1, req)
+
+		err := invoker(ctx, method, req, reply, cc, callOpts...)
+
+		messageReceived.Event(ctx, 1, reply)
+
+		if err != nil {
+			s, _ := status.FromError(err)
+			span.SetStatus(codes.Error, s.Message())
+			span.SetAttributes(statusCodeAttr(s.Code()))
+		} else {
+			span.SetAttributes(statusCodeAttr(grpc_codes.OK))
+		}
+
+		return err
+	}
+}
+
+type streamEventType int
+
+type streamEvent struct {
+	Type streamEventType
+	Err  error
+}
+
+const (
+	closeEvent streamEventType = iota
+	receiveEndEvent
+	errorEvent
+)
+
+// clientStream  wraps around the embedded grpc.ClientStream, and intercepts the RecvMsg and
+// SendMsg method call.
+type clientStream struct {
+	grpc.ClientStream
+
+	desc       *grpc.StreamDesc
+	events     chan streamEvent
+	eventsDone chan struct{}
+	finished   chan error
+
+	receivedMessageID int
+	sentMessageID     int
+}
+
+var _ = proto.Marshal
+
+func (w *clientStream) RecvMsg(m interface{}) error {
+	err := w.ClientStream.RecvMsg(m)
+
+	if err == nil && !w.desc.ServerStreams {
+		w.sendStreamEvent(receiveEndEvent, nil)
+	} else if err == io.EOF {
+		w.sendStreamEvent(receiveEndEvent, nil)
+	} else if err != nil {
+		w.sendStreamEvent(errorEvent, err)
+	} else {
+		w.receivedMessageID++
+		messageReceived.Event(w.Context(), w.receivedMessageID, m)
+	}
+
+	return err
+}
+
+func (w *clientStream) SendMsg(m interface{}) error {
+	err := w.ClientStream.SendMsg(m)
+
+	w.sentMessageID++
+	messageSent.Event(w.Context(), w.sentMessageID, m)
+
+	if err != nil {
+		w.sendStreamEvent(errorEvent, err)
+	}
+
+	return err
+}
+
+func (w *clientStream) Header() (metadata.MD, error) {
+	md, err := w.ClientStream.Header()
+
+	if err != nil {
+		w.sendStreamEvent(errorEvent, err)
+	}
+
+	return md, err
+}
+
+func (w *clientStream) CloseSend() error {
+	err := w.ClientStream.CloseSend()
+
+	if err != nil {
+		w.sendStreamEvent(errorEvent, err)
+	} else {
+		w.sendStreamEvent(closeEvent, nil)
+	}
+
+	return err
+}
+
+const (
+	clientClosedState byte = 1 << iota
+	receiveEndedState
+)
+
+func wrapClientStream(s grpc.ClientStream, desc *grpc.StreamDesc) *clientStream {
+	events := make(chan streamEvent)
+	eventsDone := make(chan struct{})
+	finished := make(chan error)
+
+	go func() {
+		defer close(eventsDone)
+
+		// Both streams have to be closed
+		state := byte(0)
+
+		for event := range events {
+			switch event.Type {
+			case closeEvent:
+				state |= clientClosedState
+			case receiveEndEvent:
+				state |= receiveEndedState
+			case errorEvent:
+				finished <- event.Err
+				return
+			}
+
+			if state == clientClosedState|receiveEndedState {
+				finished <- nil
+				return
+			}
+		}
+	}()
+
+	return &clientStream{
+		ClientStream: s,
+		desc:         desc,
+		events:       events,
+		eventsDone:   eventsDone,
+		finished:     finished,
+	}
+}
+
+func (w *clientStream) sendStreamEvent(eventType streamEventType, err error) {
+	select {
+	case <-w.eventsDone:
+	case w.events <- streamEvent{Type: eventType, Err: err}:
+	}
+}
+
+// StreamClientInterceptor returns a grpc.StreamClientInterceptor suitable
+// for use in a grpc.Dial call.
+func StreamClientInterceptor(opts ...Option) grpc.StreamClientInterceptor {
+	return func(
+		ctx context.Context,
+		desc *grpc.StreamDesc,
+		cc *grpc.ClientConn,
+		method string,
+		streamer grpc.Streamer,
+		callOpts ...grpc.CallOption,
+	) (grpc.ClientStream, error) {
+		requestMetadata, _ := metadata.FromOutgoingContext(ctx)
+		metadataCopy := requestMetadata.Copy()
+
+		tracer := newConfig(opts).TracerProvider.Tracer(
+			instrumentationName,
+			trace.WithInstrumentationVersion(otelcontrib.SemVersion()),
+		)
+
+		name, attr := spanInfo(method, cc.Target())
+		var span trace.Span
+		ctx, span = tracer.Start(
+			ctx,
+			name,
+			trace.WithSpanKind(trace.SpanKindClient),
+			trace.WithAttributes(attr...),
+		)
+
+		Inject(ctx, &metadataCopy, opts...)
+		ctx = metadata.NewOutgoingContext(ctx, metadataCopy)
+
+		s, err := streamer(ctx, desc, cc, method, callOpts...)
+		if err != nil {
+			grpcStatus, _ := status.FromError(err)
+			span.SetStatus(codes.Error, grpcStatus.Message())
+			span.SetAttributes(statusCodeAttr(grpcStatus.Code()))
+			span.End()
+			return s, err
+		}
+		stream := wrapClientStream(s, desc)
+
+		go func() {
+			err := <-stream.finished
+
+			if err != nil {
+				s, _ := status.FromError(err)
+				span.SetStatus(codes.Error, s.Message())
+				span.SetAttributes(statusCodeAttr(s.Code()))
+			} else {
+				span.SetAttributes(statusCodeAttr(grpc_codes.OK))
+			}
+
+			span.End()
+		}()
+
+		return stream, nil
+	}
+}
+
+// UnaryServerInterceptor returns a grpc.UnaryServerInterceptor suitable
+// for use in a grpc.NewServer call.
+func UnaryServerInterceptor(opts ...Option) grpc.UnaryServerInterceptor {
+	return func(
+		ctx context.Context,
+		req interface{},
+		info *grpc.UnaryServerInfo,
+		handler grpc.UnaryHandler,
+	) (interface{}, error) {
+		requestMetadata, _ := metadata.FromIncomingContext(ctx)
+		metadataCopy := requestMetadata.Copy()
+
+		bags, spanCtx := Extract(ctx, &metadataCopy, opts...)
+		ctx = baggage.ContextWithBaggage(ctx, bags)
+
+		tracer := newConfig(opts).TracerProvider.Tracer(
+			instrumentationName,
+			trace.WithInstrumentationVersion(otelcontrib.SemVersion()),
+		)
+
+		name, attr := spanInfo(info.FullMethod, peerFromCtx(ctx))
+		ctx, span := tracer.Start(
+			trace.ContextWithRemoteSpanContext(ctx, spanCtx),
+			name,
+			trace.WithSpanKind(trace.SpanKindServer),
+			trace.WithAttributes(attr...),
+		)
+		defer span.End()
+
+		messageReceived.Event(ctx, 1, req)
+
+		resp, err := handler(ctx, req)
+		if err != nil {
+			s, _ := status.FromError(err)
+			span.SetStatus(codes.Error, s.Message())
+			span.SetAttributes(statusCodeAttr(s.Code()))
+			messageSent.Event(ctx, 1, s.Proto())
+		} else {
+			span.SetAttributes(statusCodeAttr(grpc_codes.OK))
+			messageSent.Event(ctx, 1, resp)
+		}
+
+		return resp, err
+	}
+}
+
+// serverStream wraps around the embedded grpc.ServerStream, and intercepts the RecvMsg and
+// SendMsg method call.
+type serverStream struct {
+	grpc.ServerStream
+	ctx context.Context
+
+	receivedMessageID int
+	sentMessageID     int
+}
+
+func (w *serverStream) Context() context.Context {
+	return w.ctx
+}
+
+func (w *serverStream) RecvMsg(m interface{}) error {
+	err := w.ServerStream.RecvMsg(m)
+
+	if err == nil {
+		w.receivedMessageID++
+		messageReceived.Event(w.Context(), w.receivedMessageID, m)
+	}
+
+	return err
+}
+
+func (w *serverStream) SendMsg(m interface{}) error {
+	err := w.ServerStream.SendMsg(m)
+
+	w.sentMessageID++
+	messageSent.Event(w.Context(), w.sentMessageID, m)
+
+	return err
+}
+
+func wrapServerStream(ctx context.Context, ss grpc.ServerStream) *serverStream {
+	return &serverStream{
+		ServerStream: ss,
+		ctx:          ctx,
+	}
+}
+
+// StreamServerInterceptor returns a grpc.StreamServerInterceptor suitable
+// for use in a grpc.NewServer call.
+func StreamServerInterceptor(opts ...Option) grpc.StreamServerInterceptor {
+	return func(
+		srv interface{},
+		ss grpc.ServerStream,
+		info *grpc.StreamServerInfo,
+		handler grpc.StreamHandler,
+	) error {
+		ctx := ss.Context()
+
+		requestMetadata, _ := metadata.FromIncomingContext(ctx)
+		metadataCopy := requestMetadata.Copy()
+
+		bags, spanCtx := Extract(ctx, &metadataCopy, opts...)
+		ctx = baggage.ContextWithBaggage(ctx, bags)
+
+		tracer := newConfig(opts).TracerProvider.Tracer(
+			instrumentationName,
+			trace.WithInstrumentationVersion(otelcontrib.SemVersion()),
+		)
+
+		name, attr := spanInfo(info.FullMethod, peerFromCtx(ctx))
+		ctx, span := tracer.Start(
+			trace.ContextWithRemoteSpanContext(ctx, spanCtx),
+			name,
+			trace.WithSpanKind(trace.SpanKindServer),
+			trace.WithAttributes(attr...),
+		)
+		defer span.End()
+
+		err := handler(srv, wrapServerStream(ctx, ss))
+
+		if err != nil {
+			s, _ := status.FromError(err)
+			span.SetStatus(codes.Error, s.Message())
+			span.SetAttributes(statusCodeAttr(s.Code()))
+		} else {
+			span.SetAttributes(statusCodeAttr(grpc_codes.OK))
+		}
+
+		return err
+	}
+}
+
+// spanInfo returns a span name and all appropriate attributes from the gRPC
+// method and peer address.
+func spanInfo(fullMethod, peerAddress string) (string, []attribute.KeyValue) {
+	attrs := []attribute.KeyValue{RPCSystemGRPC}
+	name, mAttrs := parseFullMethod(fullMethod)
+	attrs = append(attrs, mAttrs...)
+	attrs = append(attrs, peerAttr(peerAddress)...)
+	return name, attrs
+}
+
+// peerAttr returns attributes about the peer address.
+func peerAttr(addr string) []attribute.KeyValue {
+	host, port, err := net.SplitHostPort(addr)
+	if err != nil {
+		return []attribute.KeyValue(nil)
+	}
+
+	if host == "" {
+		host = "127.0.0.1"
+	}
+
+	return []attribute.KeyValue{
+		semconv.NetPeerIPKey.String(host),
+		semconv.NetPeerPortKey.String(port),
+	}
+}
+
+// peerFromCtx returns a peer address from a context, if one exists.
+func peerFromCtx(ctx context.Context) string {
+	p, ok := peer.FromContext(ctx)
+	if !ok {
+		return ""
+	}
+	return p.Addr.String()
+}
+
+// parseFullMethod returns a span name following the OpenTelemetry semantic
+// conventions as well as all applicable span attribute.KeyValue attributes based
+// on a gRPC's FullMethod.
+func parseFullMethod(fullMethod string) (string, []attribute.KeyValue) {
+	name := strings.TrimLeft(fullMethod, "/")
+	parts := strings.SplitN(name, "/", 2)
+	if len(parts) != 2 {
+		// Invalid format, does not follow `/package.service/method`.
+		return name, []attribute.KeyValue(nil)
+	}
+
+	var attrs []attribute.KeyValue
+	if service := parts[0]; service != "" {
+		attrs = append(attrs, semconv.RPCServiceKey.String(service))
+	}
+	if method := parts[1]; method != "" {
+		attrs = append(attrs, semconv.RPCMethodKey.String(method))
+	}
+	return name, attrs
+}
+
+// statusCodeAttr returns status code attribute based on given gRPC code
+func statusCodeAttr(c grpc_codes.Code) attribute.KeyValue {
+	return GRPCStatusCodeKey.Int64(int64(c))
+}
diff --git a/vendor/go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc/semconv.go b/vendor/go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc/semconv.go
new file mode 100644
index 000000000..1646ef851
--- /dev/null
+++ b/vendor/go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc/semconv.go
@@ -0,0 +1,52 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package otelgrpc
+
+import (
+	"go.opentelemetry.io/otel/attribute"
+	semconv "go.opentelemetry.io/otel/semconv/v1.4.0"
+)
+
+// Semantic conventions for attribute keys for gRPC.
+const (
+	// Name of message transmitted or received.
+	RPCNameKey = attribute.Key("name")
+
+	// Type of message transmitted or received.
+	RPCMessageTypeKey = attribute.Key("message.type")
+
+	// Identifier of message transmitted or received.
+	RPCMessageIDKey = attribute.Key("message.id")
+
+	// The compressed size of the message transmitted or received in bytes.
+	RPCMessageCompressedSizeKey = attribute.Key("message.compressed_size")
+
+	// The uncompressed size of the message transmitted or received in
+	// bytes.
+	RPCMessageUncompressedSizeKey = attribute.Key("message.uncompressed_size")
+)
+
+// Semantic conventions for common RPC attributes.
+var (
+	// Semantic convention for gRPC as the remoting system.
+	RPCSystemGRPC = semconv.RPCSystemKey.String("grpc")
+
+	// Semantic convention for a message named message.
+	RPCNameMessage = RPCNameKey.String("message")
+
+	// Semantic conventions for RPC message types.
+	RPCMessageTypeSent     = RPCMessageTypeKey.String("SENT")
+	RPCMessageTypeReceived = RPCMessageTypeKey.String("RECEIVED")
+)
diff --git a/vendor/go.opentelemetry.io/contrib/pre_release.sh b/vendor/go.opentelemetry.io/contrib/pre_release.sh
new file mode 100644
index 000000000..971e86b4d
--- /dev/null
+++ b/vendor/go.opentelemetry.io/contrib/pre_release.sh
@@ -0,0 +1,158 @@
+#!/usr/bin/env bash
+
+# Copyright The OpenTelemetry Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+#
+# This script is used for
+# a) creating a new tagged release of go.opentelemetry.io/contrib
+# b) bumping the referenced version of go.opentelemetry.io/otel
+#
+# The options can be used together or individually.
+#
+set -e
+
+declare CONTRIB_TAG
+declare OTEL_TAG
+
+help() {
+   printf "\n"
+   printf "Usage: %s [-o otel_tag] [-t tag]\n" "$0"
+   printf "\t-o Otel release tag. Update all go.mod to reference go.opentelemetry.io/otel <otel_tag>.\n"
+   printf "\t-t New Contrib unreleased tag. Update all go.mod files with this tag.\n"
+   exit 1 # Exit script after printing help
+}
+
+while getopts "t:o:" opt
+do
+   case "$opt" in
+      t ) CONTRIB_TAG="$OPTARG" ;;
+      o ) OTEL_TAG="$OPTARG" ;;
+      ? ) help ;; # Print help
+   esac
+done
+
+declare -r SEMVER_REGEX="^v(0|[1-9][0-9]*)\\.(0|[1-9][0-9]*)\\.(0|[1-9][0-9]*)(\\-[0-9A-Za-z-]+(\\.[0-9A-Za-z-]+)*)?(\\+[0-9A-Za-z-]+(\\.[0-9A-Za-z-]+)*)?$"
+
+validate_tag() {
+    local tag_=$1
+    if [[ "${tag_}" =~ ${SEMVER_REGEX} ]]; then
+	    printf "%s is valid semver tag.\n" "${tag_}"
+    else
+	    printf "%s is not a valid semver tag.\n" "${tag_}"
+	    return 1
+    fi
+}
+
+# Print help in case parameters are empty
+if [[ -z "$CONTRIB_TAG" && -z "$OTEL_TAG" ]]
+then
+    printf "At least one of '-o' or '-t' must be specified.\n"
+    help
+fi
+
+
+## Validate tags first
+if [ -n "${OTEL_TAG}" ]; then
+    validate_tag "${OTEL_TAG}" || exit $?
+
+    # check that OTEL_TAG is a currently released tag for go.opentelemetry.io/otel
+    TMPDIR=$(mktemp -d "/tmp/otel-contrib.XXXXXX") || exit 1
+    trap "rm -fr ${TMPDIR}" EXIT
+    (cd "${TMPDIR}" && go mod init tagtest)
+    # requires go 1.14 for support of '-modfile'
+    if ! go get -modfile="${TMPDIR}/go.mod" -d -v "go.opentelemetry.io/otel@${OTEL_TAG}"; then
+        printf "go.opentelemetry.io/otel %s does not exist. Please supply a valid tag\n" "${OTEL_TAG}"
+        exit 1
+    fi
+fi
+if [ -n "${CONTRIB_TAG}" ]; then
+    validate_tag "${CONTRIB_TAG}" || exit $?
+    TAG_FOUND=$(git tag --list "${CONTRIB_TAG}")
+    if [[ ${TAG_FOUND} = "${CONTRIB_TAG}" ]] ; then
+        printf "Tag %s already exists in this repo\n" "${CONTRIB_TAG}"
+        exit 1
+    fi
+else
+    CONTRIB_TAG=${OTEL_TAG}  # if contrib_tag not specified, but OTEL_TAG is, then set it to OTEL_TAG
+fi
+
+# Get version for contrib.go
+OTEL_CONTRIB_VERSION=$(echo "${CONTRIB_TAG}" | egrep -o "${SEMVER_REGEX}")
+# Strip leading v
+OTEL_CONTRIB_VERSION="${OTEL_CONTRIB_VERSION#v}"
+
+cd "$(dirname "$0")"
+
+if ! git diff --quiet; then \
+    printf "Working tree is not clean, can't proceed\n"
+    git status
+    git diff
+    exit 1
+fi
+
+# Update contrib.go version definition
+cp contrib.go contrib.go.bak
+sed "s/\(return \"\)[0-9]*\.[0-9]*\.[0-9]*\"/\1${OTEL_CONTRIB_VERSION}\"/" ./contrib.go.bak > ./contrib.go
+rm -f ./contrib.go.bak
+
+declare -r BRANCH_NAME=pre_release_${CONTRIB_TAG}
+
+patch_gomods() {
+    local pkg_=$1
+    local tag_=$2
+    # now do the same for all the directories underneath
+    PACKAGE_DIRS=$(find . -mindepth 2 -type f -name 'go.mod' -exec dirname {} \; | egrep -v 'tools' | sed 's|^\.\/||' | sort)
+    # quote any '.' characters in the pkg name
+    local quoted_pkg_=${pkg_//./\\.}
+    for dir in $PACKAGE_DIRS; do
+	    cp "${dir}/go.mod" "${dir}/go.mod.bak"
+	    sed "s|${quoted_pkg_}\([^ ]*\) v[0-9][0-9]*\.[0-9][0-9]*\.[0-9][0-9]*[^0-9]*.*$|${pkg_}\1 ${tag_}|" "${dir}/go.mod.bak" >"${dir}/go.mod"
+	    rm -f "${dir}/go.mod.bak"
+    done
+}
+
+# branch off from existing main
+git checkout -b "${BRANCH_NAME}" main
+
+# Update go.mods
+if [ -n "${OTEL_TAG}" ]; then
+    # first update the top most module
+    go get "go.opentelemetry.io/otel@${OTEL_TAG}"
+    patch_gomods go.opentelemetry.io/otel "${OTEL_TAG}"
+fi
+
+if [ -n "${CONTRIB_TAG}" ]; then
+    patch_gomods go.opentelemetry.io/contrib "${CONTRIB_TAG}"
+fi
+
+git diff
+# Run lint to update go.sum
+make lint
+
+# Add changes and commit.
+git add .
+make ci
+# Check whether registry links are up to date
+make registry-links-check
+
+declare COMMIT_MSG=""
+if [ -n "${OTEL_TAG}" ]; then
+    COMMIT_MSG+="Bumping otel version to ${OTEL_TAG}"
+fi
+COMMIT_MSG+=".  Prepare for releasing ${CONTRIB_TAG}"
+git commit -m "${COMMIT_MSG}"
+
+printf "Now run following to verify the changes.\ngit diff main\n"
+printf "\nThen push the changes to upstream\n"
diff --git a/vendor/go.opentelemetry.io/contrib/tag.sh b/vendor/go.opentelemetry.io/contrib/tag.sh
new file mode 100644
index 000000000..2a0ef1d26
--- /dev/null
+++ b/vendor/go.opentelemetry.io/contrib/tag.sh
@@ -0,0 +1,178 @@
+#!/usr/bin/env bash
+
+# Copyright The OpenTelemetry Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+readonly PROGNAME=$(basename "$0")
+readonly PROGDIR=$(readlink -m "$(dirname "$0")")
+
+readonly EXCLUDE_PACKAGES="tools"
+readonly SEMVER_REGEX="v(0|[1-9][0-9]*)\\.(0|[1-9][0-9]*)\\.(0|[1-9][0-9]*)(\\-[0-9A-Za-z-]+(\\.[0-9A-Za-z-]+)*)?(\\+[0-9A-Za-z-]+(\\.[0-9A-Za-z-]+)*)?"
+
+usage() {
+    cat <<- EOF
+Usage: $PROGNAME [OPTIONS] SEMVER_TAG COMMIT_HASH
+
+Creates git tag for all Go packages in project.
+
+OPTIONS:
+  -h --help        Show this help.
+
+ARGUMENTS:
+  SEMVER_TAG       Semantic version to tag with.
+  COMMIT_HASH      Git commit hash to tag.
+EOF
+}
+
+cmdline() {
+    local arg commit
+
+    for arg
+    do
+        local delim=""
+        case "$arg" in
+            # Translate long form options to short form.
+            --help)           args="${args}-h ";;
+            # Pass through for everything else.
+            *) [[ "${arg:0:1}" == "-" ]] || delim="\""
+                args="${args}${delim}${arg}${delim} ";;
+        esac
+    done
+
+    # Reset and process short form options.
+    eval set -- "$args"
+
+    while getopts "h" OPTION
+    do
+         case $OPTION in
+         h)
+             usage
+             exit 0
+             ;;
+         *)
+             echo "unknown option: $OPTION"
+             usage
+             exit 1
+             ;;
+        esac
+    done
+
+    # Positional arguments.
+    shift $((OPTIND-1))
+    readonly TAG="$1"
+    if [ -z "$TAG" ]
+    then
+        echo "missing SEMVER_TAG"
+        usage
+        exit 1
+    fi
+    if [[ ! "$TAG" =~ $SEMVER_REGEX ]]
+    then
+        printf "invalid semantic version: %s\n" "$TAG"
+        exit 2
+    fi
+    if [[ "$( git tag --list "$TAG" )" ]]
+    then
+        printf "tag already exists: %s\n" "$TAG"
+        exit 2
+    fi
+
+    shift
+    commit="$1"
+    if [ -z "$commit" ]
+    then
+        echo "missing COMMIT_HASH"
+        usage
+        exit 1
+    fi
+    # Verify rev is for a commit and unify hashes into a complete SHA1.
+    readonly SHA="$( git rev-parse --quiet --verify "${commit}^{commit}" )"
+    if [ -z "$SHA" ]
+    then
+        printf "invalid commit hash: %s\n" "$commit"
+        exit 2
+    fi
+    if [ "$( git merge-base "$SHA" HEAD )" != "$SHA" ]
+    then
+        printf "commit '%s' not found on this branch\n" "$commit"
+        exit 2
+    fi
+}
+
+package_dirs() {
+    # Return a list of package directories in the form:
+    #
+    #  package/directory/a
+    #  package/directory/b
+    #  deeper/package/directory/a
+    #  ...
+    #
+    # Making sure to exclude any packages in the EXCLUDE_PACKAGES regexp.
+    find . -mindepth 2 -type f -name 'go.mod' -exec dirname {} \; \
+        | grep -E -v "$EXCLUDE_PACKAGES" \
+        | sed 's/^\.\///' \
+        | sort
+}
+
+git_tag() {
+    local tag="$1"
+    local commit="$2"
+
+    git tag -a "$tag" -s -m "Version $tag" "$commit"
+}
+
+previous_version() {
+    local current="$1"
+
+    # Requires git > 2.0
+    git tag -l --sort=v:refname \
+        | grep -E "^${SEMVER_REGEX}$" \
+        | grep -v "$current" \
+        | tail -1
+}
+
+print_changes() {
+    local tag="$1"
+    local previous
+
+    previous="$( previous_version "$tag" )"
+    if [ -n "$previous" ]
+    then
+        printf "\nRaw changes made between %s and %s\n" "$previous" "$tag"
+        printf "======================================\n"
+        git --no-pager log --pretty=oneline "${previous}..$tag"
+    fi
+}
+
+main() {
+    local dir
+
+    cmdline "$@"
+
+    cd "$PROGDIR" || exit 3
+
+    # Create tag for root package.
+    git_tag "$TAG" "$SHA"
+    printf "created tag: %s\n" "$TAG"
+
+    # Create tag for all sub-packages.
+    for dir in $( package_dirs )
+    do
+        git_tag "${dir}/$TAG" "$SHA"
+        printf "created tag: %s\n" "${dir}/$TAG"
+    done
+
+    print_changes "$TAG"
+}
+main "$@"
diff --git a/vendor/go.opentelemetry.io/otel/.gitattributes b/vendor/go.opentelemetry.io/otel/.gitattributes
new file mode 100644
index 000000000..314766e91
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/.gitattributes
@@ -0,0 +1,3 @@
+* text=auto eol=lf
+*.{cmd,[cC][mM][dD]} text eol=crlf
+*.{bat,[bB][aA][tT]} text eol=crlf
diff --git a/vendor/go.opentelemetry.io/otel/.gitignore b/vendor/go.opentelemetry.io/otel/.gitignore
new file mode 100644
index 000000000..f798ce8fb
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/.gitignore
@@ -0,0 +1,20 @@
+.DS_Store
+Thumbs.db
+
+.tools/
+.idea/
+.vscode/
+*.iml
+*.so
+coverage.*
+
+gen/
+
+/example/jaeger/jaeger
+/example/namedtracer/namedtracer
+/example/opencensus/opencensus
+/example/passthrough/passthrough
+/example/prometheus/prometheus
+/example/prom-collector/prom-collector
+/example/zipkin/zipkin
+/example/otel-collector/otel-collector
diff --git a/vendor/go.opentelemetry.io/otel/.gitmodules b/vendor/go.opentelemetry.io/otel/.gitmodules
new file mode 100644
index 000000000..38a1f5698
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "opentelemetry-proto"]
+	path = exporters/otlp/internal/opentelemetry-proto
+	url = https://github.com/open-telemetry/opentelemetry-proto
diff --git a/vendor/go.opentelemetry.io/otel/.golangci.yml b/vendor/go.opentelemetry.io/otel/.golangci.yml
new file mode 100644
index 000000000..d40bdedc3
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/.golangci.yml
@@ -0,0 +1,32 @@
+# See https://github.com/golangci/golangci-lint#config-file
+run:
+  issues-exit-code: 1 #Default
+  tests: true #Default
+
+linters:
+  enable:
+    - misspell
+    - goimports
+    - revive
+    - gofmt
+
+issues:
+  exclude-rules:
+    # helpers in tests often (rightfully) pass a *testing.T as their first argument
+    - path: _test\.go
+      text: "context.Context should be the first parameter of a function"
+      linters:
+        - revive
+    # Yes, they are, but it's okay in a test
+    - path: _test\.go
+      text: "exported func.*returns unexported type.*which can be annoying to use"
+      linters:
+        - revive
+
+linters-settings:
+  misspell:
+    locale: US
+    ignore-words:
+      - cancelled
+  goimports:
+    local-prefixes: go.opentelemetry.io
diff --git a/vendor/go.opentelemetry.io/otel/.markdown-link.json b/vendor/go.opentelemetry.io/otel/.markdown-link.json
new file mode 100644
index 000000000..f222ad89c
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/.markdown-link.json
@@ -0,0 +1,16 @@
+{
+    "ignorePatterns": [
+        {
+            "pattern": "^http(s)?://localhost"
+        }
+    ],
+    "replacementPatterns": [
+        {
+            "pattern": "^/registry",
+            "replacement": "https://opentelemetry.io/registry"
+        }
+    ],
+    "retryOn429": true,
+    "retryCount": 5,
+    "fallbackRetryDelay": "30s"
+}
diff --git a/vendor/go.opentelemetry.io/otel/.markdownlint.yaml b/vendor/go.opentelemetry.io/otel/.markdownlint.yaml
new file mode 100644
index 000000000..3202496c3
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/.markdownlint.yaml
@@ -0,0 +1,29 @@
+# Default state for all rules
+default: true
+
+# ul-style
+MD004: false
+
+# hard-tabs
+MD010: false
+
+# line-length
+MD013: false
+
+# no-duplicate-header
+MD024:
+  siblings_only: true
+
+#single-title
+MD025: false
+
+# ol-prefix
+MD029:
+  style: ordered
+
+# no-inline-html
+MD033: false
+
+# fenced-code-language
+MD040: false
+
diff --git a/vendor/go.opentelemetry.io/otel/CHANGELOG.md b/vendor/go.opentelemetry.io/otel/CHANGELOG.md
new file mode 100644
index 000000000..27ff1bbb2
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/CHANGELOG.md
@@ -0,0 +1,1448 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
+
+This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [Unreleased]
+
+### Added
+
+### Changed
+
+### Deprecated
+
+### Removed
+
+### Fixed
+
+### Security
+
+## [1.0.0-RC1] / 0.21.0 - 2021-06-18
+
+With this release we are introducing a split in module versions.  The tracing API and SDK are entering the `v1.0.0` Release Candidate phase with `v1.0.0-RC1`
+while the experimental metrics API and SDK continue with `v0.x` releases at `v0.21.0`.  Modules at major version 1 or greater will not depend on modules
+with major version 0.
+
+### Added
+
+- Adds `otlpgrpc.WithRetry`option for configuring the retry policy for transient errors on the otlp/gRPC exporter. (#1832)
+  - The following status codes are defined as transient errors:
+      | gRPC Status Code | Description |
+      | ---------------- | ----------- |
+      | 1  | Cancelled |
+      | 4  | Deadline Exceeded |
+      | 8  | Resource Exhausted |
+      | 10 | Aborted |
+      | 10 | Out of Range |
+      | 14 | Unavailable |
+      | 15 | Data Loss |
+- Added `Status` type to the `go.opentelemetry.io/otel/sdk/trace` package to represent the status of a span. (#1874)
+- Added `SpanStub` type and its associated functions to the `go.opentelemetry.io/otel/sdk/trace/tracetest` package.
+  This type can be used as a testing replacement for the `SpanSnapshot` that was removed from the `go.opentelemetry.io/otel/sdk/trace` package. (#1873)
+- Adds support for scheme in `OTEL_EXPORTER_OTLP_ENDPOINT` according to the spec. (#1886)
+- Adds `trace.WithSchemaURL` option for configuring the tracer with a Schema URL. (#1889)
+- Added an example of using OpenTelemetry Go as a trace context forwarder. (#1912)
+- `ParseTraceState` is added to the `go.opentelemetry.io/otel/trace` package.
+  It can be used to decode a `TraceState` from a `tracestate` header string value. (#1937)
+- Added `Len` method to the `TraceState` type in the `go.opentelemetry.io/otel/trace` package.
+  This method returns the number of list-members the `TraceState` holds. (#1937)
+- Creates package `go.opentelemetry.io/otel/exporters/otlp/otlptrace` that defines a trace exporter that uses a `otlptrace.Client` to send data.
+  Creates package `go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc` implementing a gRPC `otlptrace.Client` and offers convenience functions, `NewExportPipeline` and `InstallNewPipeline`, to setup and install a `otlptrace.Exporter` in tracing .(#1922)
+- Added `Baggage`, `Member`, and `Property` types to the `go.opentelemetry.io/otel/baggage` package along with their related functions. (#1967)
+- Added `ContextWithBaggage`, `ContextWithoutBaggage`, and `FromContext` functions to the `go.opentelemetry.io/otel/baggage` package.
+  These functions replace the `Set`, `Value`, `ContextWithValue`, `ContextWithoutValue`, and `ContextWithEmpty` functions from that package and directly work with the new `Baggage` type. (#1967)
+- The `OTEL_SERVICE_NAME` environment variable is the preferred source for `service.name`, used by the environment resource detector if a service name is present both there and in `OTEL_RESOURCE_ATTRIBUTES`. (#1969)
+- Creates package `go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp` implementing an HTTP `otlptrace.Client` and offers convenience functions, `NewExportPipeline` and `InstallNewPipeline`, to setup and install a `otlptrace.Exporter` in tracing. (#1963)
+- Changes `go.opentelemetry.io/otel/sdk/resource.NewWithAttributes` to require a schema URL. The old function is still available as `resource.NewSchemaless`. This is a breaking change. (#1938)
+- Several builtin resource detectors now correctly populate the schema URL. (#1938)
+- Creates package `go.opentelemetry.io/otel/exporters/otlp/otlpmetric` that defines a metrics exporter that uses a `otlpmetric.Client` to send data.
+- Creates package `go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc` implementing a gRPC `otlpmetric.Client` and offers convenience functions, `New` and `NewUnstarted`, to create an `otlpmetric.Exporter`.(#1991)
+- Added `go.opentelemetry.io/otel/exporters/stdout/stdouttrace` exporter. (#2005)
+- Added `go.opentelemetry.io/otel/exporters/stdout/stdoutmetric` exporter. (#2005)
+- Added a `TracerProvider()` method to the `"go.opentelemetry.io/otel/trace".Span` interface. This can be used to obtain a `TracerProvider` from a given span that utilizes the same trace processing pipeline.  (#2009)
+
+### Changed
+
+- Make `NewSplitDriver` from `go.opentelemetry.io/otel/exporters/otlp` take variadic arguments instead of a `SplitConfig` item.
+  `NewSplitDriver` now automatically implements an internal `noopDriver` for `SplitConfig` fields that are not initialized. (#1798)
+- `resource.New()` now creates a Resource without builtin detectors. Previous behavior is now achieved by using `WithBuiltinDetectors` Option. (#1810)
+- Move the `Event` type from the `go.opentelemetry.io/otel` package to the `go.opentelemetry.io/otel/sdk/trace` package. (#1846)
+- CI builds validate against last two versions of Go, dropping 1.14 and adding 1.16. (#1865)
+- BatchSpanProcessor now report export failures when calling `ForceFlush()` method. (#1860)
+- `Set.Encoded(Encoder)` no longer caches the result of an encoding. (#1855)
+- Renamed `CloudZoneKey` to `CloudAvailabilityZoneKey` in Resource semantic conventions according to spec. (#1871)
+- The `StatusCode` and `StatusMessage` methods of the `ReadOnlySpan` interface and the `Span` produced by the `go.opentelemetry.io/otel/sdk/trace` package have been replaced with a single `Status` method.
+  This method returns the status of a span using the new `Status` type. (#1874)
+- Updated `ExportSpans` method of the`SpanExporter` interface type to accept `ReadOnlySpan`s instead of the removed `SpanSnapshot`.
+  This brings the export interface into compliance with the specification in that it now accepts an explicitly immutable type instead of just an implied one. (#1873)
+- Unembed `SpanContext` in `Link`. (#1877)
+- Generate Semantic conventions from the specification YAML. (#1891)
+- Spans created by the global `Tracer` obtained from `go.opentelemetry.io/otel`, prior to a functioning `TracerProvider` being set, now propagate the span context from their parent if one exists. (#1901)
+- The `"go.opentelemetry.io/otel".Tracer` function now accepts tracer options. (#1902)
+- Move the `go.opentelemetry.io/otel/unit` package to `go.opentelemetry.io/otel/metric/unit`. (#1903)
+- Changed `go.opentelemetry.io/otel/trace.TracerConfig` to conform to the [Contributing guidelines](CONTRIBUTING.md#config.) (#1921)
+- Changed `go.opentelemetry.io/otel/trace.SpanConfig` to conform to the [Contributing guidelines](CONTRIBUTING.md#config). (#1921)
+- Changed `span.End()` now only accepts Options that are allowed at `End()`. (#1921)
+- Changed `go.opentelemetry.io/otel/metric.InstrumentConfig` to conform to the [Contributing guidelines](CONTRIBUTING.md#config). (#1921)
+- Changed `go.opentelemetry.io/otel/metric.MeterConfig` to conform to the [Contributing guidelines](CONTRIBUTING.md#config). (#1921)
+- Refactored option types according to the contribution style guide. (#1882)
+- Move the `go.opentelemetry.io/otel/trace.TraceStateFromKeyValues` function to the `go.opentelemetry.io/otel/oteltest` package.
+  This function is preserved for testing purposes where it may be useful to create a `TraceState` from `attribute.KeyValue`s, but it is not intended for production use.
+  The new `ParseTraceState` function should be used to create a `TraceState`. (#1931)
+- Updated `MarshalJSON` method of the `go.opentelemetry.io/otel/trace.TraceState` type to marshal the type into the string representation of the `TraceState`. (#1931)
+- The `TraceState.Delete` method from the `go.opentelemetry.io/otel/trace` package no longer returns an error in addition to a `TraceState`. (#1931)
+- Updated `Get` method of the `TraceState` type from the `go.opentelemetry.io/otel/trace` package to accept a `string` instead of an `attribute.Key` type. (#1931)
+- Updated `Insert` method of the `TraceState` type from the `go.opentelemetry.io/otel/trace` package to accept a pair of `string`s instead of an `attribute.KeyValue` type. (#1931)
+- Updated `Delete` method of the `TraceState` type from the `go.opentelemetry.io/otel/trace` package to accept a `string` instead of an `attribute.Key` type. (#1931)
+- Renamed `NewExporter` to `New` in the `go.opentelemetry.io/otel/exporters/stdout` package. (#1985)
+- Renamed `NewExporter` to `New` in the `go.opentelemetry.io/otel/exporters/metric/prometheus` package. (#1985)
+- Renamed `NewExporter` to `New` in the `go.opentelemetry.io/otel/exporters/trace/jaeger` package. (#1985)
+- Renamed `NewExporter` to `New` in the `go.opentelemetry.io/otel/exporters/trace/zipkin` package. (#1985)
+- Renamed `NewExporter` to `New` in the `go.opentelemetry.io/otel/exporters/otlp` package. (#1985)
+- Renamed `NewUnstartedExporter` to `NewUnstarted` in the `go.opentelemetry.io/otel/exporters/otlp` package. (#1985)
+- The `go.opentelemetry.io/otel/semconv` package has been moved to `go.opentelemetry.io/otel/semconv/v1.4.0` to allow for multiple [telemetry schema](https://github.com/open-telemetry/oteps/blob/main/text/0152-telemetry-schemas.md) versions to be used concurrently. (#1987)
+- Metrics test helpers in `go.opentelemetry.io/otel/oteltest` have been moved to `go.opentelemetry.io/otel/metric/metrictest`. (#1988)
+
+### Deprecated
+
+- The `go.opentelemetry.io/otel/exporters/metric/prometheus` is deprecated, use `go.opentelemetry.io/otel/exporters/prometheus` instead. (#1993)
+- The `go.opentelemetry.io/otel/exporters/trace/jaeger` is deprecated, use `go.opentelemetry.io/otel/exporters/jaeger` instead. (#1993)
+- The `go.opentelemetry.io/otel/exporters/trace/zipkin` is deprecated, use `go.opentelemetry.io/otel/exporters/zipkin` instead. (#1993)
+
+### Removed
+
+- Removed `resource.WithoutBuiltin()`. Use `resource.New()`. (#1810)
+- Unexported types `resource.FromEnv`, `resource.Host`, and `resource.TelemetrySDK`, Use the corresponding `With*()` to use individually. (#1810)
+- Removed the `Tracer` and `IsRecording` method from the `ReadOnlySpan` in the `go.opentelemetry.io/otel/sdk/trace`.
+  The `Tracer` method is not a required to be included in this interface and given the mutable nature of the tracer that is associated with a span, this method is not appropriate.
+  The `IsRecording` method returns if the span is recording or not.
+  A read-only span value does not need to know if updates to it will be recorded or not.
+  By definition, it cannot be updated so there is no point in communicating if an update is recorded. (#1873)
+- Removed the `SpanSnapshot` type from the `go.opentelemetry.io/otel/sdk/trace` package.
+  The use of this type has been replaced with the use of the explicitly immutable `ReadOnlySpan` type.
+  When a concrete representation of a read-only span is needed for testing, the newly added `SpanStub` in the `go.opentelemetry.io/otel/sdk/trace/tracetest` package should be used. (#1873)
+- Removed the `Tracer` method from the `Span` interface in the `go.opentelemetry.io/otel/trace` package.
+  Using the same tracer that created a span introduces the error where an instrumentation library's `Tracer` is used by other code instead of their own.
+  The `"go.opentelemetry.io/otel".Tracer` function or a `TracerProvider` should be used to acquire a library specific `Tracer` instead. (#1900)
+  - The `TracerProvider()` method on the `Span` interface may also be used to obtain a `TracerProvider` using the same trace processing pipeline. (#2009)
+- The `http.url` attribute generated by `HTTPClientAttributesFromHTTPRequest` will no longer include username or password information. (#1919)
+- Removed `IsEmpty` method of the `TraceState` type in the `go.opentelemetry.io/otel/trace` package in favor of using the added `TraceState.Len` method. (#1931)
+- Removed `Set`, `Value`, `ContextWithValue`, `ContextWithoutValue`, and `ContextWithEmpty` functions in the `go.opentelemetry.io/otel/baggage` package.
+  Handling of baggage is now done using the added `Baggage` type and related context functions (`ContextWithBaggage`, `ContextWithoutBaggage`, and `FromContext`) in that package. (#1967)
+- The `InstallNewPipeline` and `NewExportPipeline` creation functions in all the exporters (prometheus, otlp, stdout, jaeger, and zipkin) have been removed.
+  These functions were deemed premature attempts to provide convenience that did not achieve this aim. (#1985)
+- The `go.opentelemetry.io/otel/exporters/otlp` exporter has been removed.  Use `go.opentelemetry.io/otel/exporters/otlp/otlptrace` instead. (#1990)
+- The `go.opentelemetry.io/otel/exporters/stdout` exporter has been removed.  Use `go.opentelemetry.io/otel/exporters/stdout/stdouttrace` or `go.opentelemetry.io/otel/exporters/stdout/stdoutmetric` instead. (#2005)
+
+### Fixed
+
+- Only report errors from the `"go.opentelemetry.io/otel/sdk/resource".Environment` function when they are not `nil`. (#1850, #1851)
+- The `Shutdown` method of the simple `SpanProcessor` in the `go.opentelemetry.io/otel/sdk/trace` package now honors the context deadline or cancellation. (#1616, #1856)
+- BatchSpanProcessor now drops span batches that failed to be exported. (#1860)
+- Use `http://localhost:14268/api/traces` as default Jaeger collector endpoint instead of `http://localhost:14250`. (#1898)
+- Allow trailing and leading whitespace in the parsing of a `tracestate` header. (#1931)
+- Add logic to determine if the channel is closed to fix Jaeger exporter test panic with close closed channel. (#1870, #1973)
+- Avoid transport security when OTLP endpoint is a Unix socket. (#2001)
+
+### Security
+
+## [0.20.0] - 2021-04-23
+
+### Added
+
+- The OTLP exporter now has two new convenience functions, `NewExportPipeline` and `InstallNewPipeline`, setup and install the exporter in tracing and metrics pipelines. (#1373)
+- Adds semantic conventions for exceptions. (#1492)
+- Added Jaeger Environment variables: `OTEL_EXPORTER_JAEGER_AGENT_HOST`, `OTEL_EXPORTER_JAEGER_AGENT_PORT`
+  These environment variables can be used to override Jaeger agent hostname and port (#1752)
+- Option `ExportTimeout` was added to batch span processor. (#1755)
+- `trace.TraceFlags` is now a defined type over `byte` and `WithSampled(bool) TraceFlags` and `IsSampled() bool` methods have been added to it. (#1770)
+- The `Event` and `Link` struct types from the `go.opentelemetry.io/otel` package now include a `DroppedAttributeCount` field to record the number of attributes that were not recorded due to configured limits being reached. (#1771)
+- The Jaeger exporter now reports dropped attributes for a Span event in the exported log. (#1771)
+- Adds test to check BatchSpanProcessor ignores `OnEnd` and `ForceFlush` post `Shutdown`. (#1772)
+- Extract resource attributes from the `OTEL_RESOURCE_ATTRIBUTES` environment variable and merge them with the `resource.Default` resource as well as resources provided to the `TracerProvider` and metric `Controller`. (#1785)
+- Added `WithOSType` resource configuration option to set OS (Operating System) type resource attribute (`os.type`). (#1788)
+- Added `WithProcess*` resource configuration options to set Process resource attributes. (#1788)
+  - `process.pid`
+  - `process.executable.name`
+  - `process.executable.path`
+  - `process.command_args`
+  - `process.owner`
+  - `process.runtime.name`
+  - `process.runtime.version`
+  - `process.runtime.description`
+- Adds `k8s.node.name` and `k8s.node.uid` attribute keys to the `semconv` package. (#1789)
+- Added support for configuring OTLP/HTTP and OTLP/gRPC Endpoints, TLS Certificates, Headers, Compression and Timeout via Environment Variables. (#1758, #1769 and #1811)
+  - `OTEL_EXPORTER_OTLP_ENDPOINT`
+  - `OTEL_EXPORTER_OTLP_TRACES_ENDPOINT`
+  - `OTEL_EXPORTER_OTLP_METRICS_ENDPOINT`
+  - `OTEL_EXPORTER_OTLP_HEADERS`
+  - `OTEL_EXPORTER_OTLP_TRACES_HEADERS`
+  - `OTEL_EXPORTER_OTLP_METRICS_HEADERS`
+  - `OTEL_EXPORTER_OTLP_COMPRESSION`
+  - `OTEL_EXPORTER_OTLP_TRACES_COMPRESSION`
+  - `OTEL_EXPORTER_OTLP_METRICS_COMPRESSION`
+  - `OTEL_EXPORTER_OTLP_TIMEOUT`
+  - `OTEL_EXPORTER_OTLP_TRACES_TIMEOUT`
+  - `OTEL_EXPORTER_OTLP_METRICS_TIMEOUT`
+  - `OTEL_EXPORTER_OTLP_CERTIFICATE`
+  - `OTEL_EXPORTER_OTLP_TRACES_CERTIFICATE`
+  - `OTEL_EXPORTER_OTLP_METRICS_CERTIFICATE`
+- Adds `otlpgrpc.WithTimeout` option for configuring timeout to the otlp/gRPC exporter. (#1821)
+- Adds `jaeger.WithMaxPacketSize` option for configuring maximum UDP packet size used when connecting to the Jaeger agent. (#1853)
+
+### Fixed
+
+- The `Span.IsRecording` implementation from `go.opentelemetry.io/otel/sdk/trace` always returns false when not being sampled. (#1750)
+- The Jaeger exporter now correctly sets tags for the Span status code and message.
+  This means it uses the correct tag keys (`"otel.status_code"`, `"otel.status_description"`) and does not set the status message as a tag unless it is set on the span. (#1761)
+- The Jaeger exporter now correctly records Span event's names using the `"event"` key for a tag.
+  Additionally, this tag is overridden, as specified in the OTel specification, if the event contains an attribute with that key. (#1768)
+- Zipkin Exporter: Ensure mapping between OTel and Zipkin span data complies with the specification. (#1688)
+- Fixed typo for default service name in Jaeger Exporter. (#1797)
+- Fix flaky OTLP for the reconnnection of the client connection. (#1527, #1814)
+- Fix Jaeger exporter dropping of span batches that exceed the UDP packet size limit.
+  Instead, the exporter now splits the batch into smaller sendable batches. (#1828)
+
+### Changed
+
+- Span `RecordError` now records an `exception` event to comply with the semantic convention specification. (#1492)
+- Jaeger exporter was updated to use thrift v0.14.1. (#1712)
+- Migrate from using internally built and maintained version of the OTLP to the one hosted at `go.opentelemetry.io/proto/otlp`. (#1713)
+- Migrate from using `github.com/gogo/protobuf` to `google.golang.org/protobuf` to match `go.opentelemetry.io/proto/otlp`. (#1713)
+- The storage of a local or remote Span in a `context.Context` using its SpanContext is unified to store just the current Span.
+  The Span's SpanContext can now self-identify as being remote or not.
+  This means that `"go.opentelemetry.io/otel/trace".ContextWithRemoteSpanContext` will now overwrite any existing current Span, not just existing remote Spans, and make it the current Span in a `context.Context`. (#1731)
+- Improve OTLP/gRPC exporter connection errors. (#1737)
+- Information about a parent span context in a `"go.opentelemetry.io/otel/export/trace".SpanSnapshot` is unified in a new `Parent` field.
+  The existing `ParentSpanID` and `HasRemoteParent` fields are removed in favor of this. (#1748)
+- The `ParentContext` field of the `"go.opentelemetry.io/otel/sdk/trace".SamplingParameters` is updated to hold a `context.Context` containing the parent span.
+  This changes it to make `SamplingParameters` conform with the OpenTelemetry specification. (#1749)
+- Updated Jaeger Environment Variables: `JAEGER_ENDPOINT`, `JAEGER_USER`, `JAEGER_PASSWORD`
+  to `OTEL_EXPORTER_JAEGER_ENDPOINT`, `OTEL_EXPORTER_JAEGER_USER`, `OTEL_EXPORTER_JAEGER_PASSWORD` in compliance with OTel specification. (#1752)
+- Modify `BatchSpanProcessor.ForceFlush` to abort after timeout/cancellation. (#1757)
+- The `DroppedAttributeCount` field of the `Span` in the `go.opentelemetry.io/otel` package now only represents the number of attributes dropped for the span itself.
+  It no longer is a conglomerate of itself, events, and link attributes that have been dropped. (#1771)
+- Make `ExportSpans` in Jaeger Exporter honor context deadline. (#1773)
+- Modify Zipkin Exporter default service name, use default resource's serviceName instead of empty. (#1777)
+- The `go.opentelemetry.io/otel/sdk/export/trace` package is merged into the `go.opentelemetry.io/otel/sdk/trace` package. (#1778)
+- The prometheus.InstallNewPipeline example is moved from comment to example test (#1796)
+- The convenience functions for the stdout exporter have been updated to return the `TracerProvider` implementation and enable the shutdown of the exporter. (#1800)
+- Replace the flush function returned from the Jaeger exporter's convenience creation functions (`InstallNewPipeline` and `NewExportPipeline`) with the `TracerProvider` implementation they create.
+  This enables the caller to shutdown and flush using the related `TracerProvider` methods. (#1822)
+- Updated the Jaeger exporter to have a default endpoint, `http://localhost:14250`, for the collector. (#1824)
+- Changed the function `WithCollectorEndpoint` in the Jaeger exporter to no longer accept an endpoint as an argument.
+  The endpoint can be passed with the `CollectorEndpointOption` using the `WithEndpoint` function or by setting the `OTEL_EXPORTER_JAEGER_ENDPOINT` environment variable value appropriately. (#1824)
+- The Jaeger exporter no longer batches exported spans itself, instead it relies on the SDK's `BatchSpanProcessor` for this functionality. (#1830)
+- The Jaeger exporter creation functions (`NewRawExporter`, `NewExportPipeline`, and `InstallNewPipeline`) no longer accept the removed `Option` type as a variadic argument. (#1830)
+
+### Removed
+
+- Removed Jaeger Environment variables: `JAEGER_SERVICE_NAME`, `JAEGER_DISABLED`, `JAEGER_TAGS`
+  These environment variables will no longer be used to override values of the Jaeger exporter (#1752)
+- No longer set the links for a `Span` in `go.opentelemetry.io/otel/sdk/trace` that is configured to be a new root.
+  This is unspecified behavior that the OpenTelemetry community plans to standardize in the future.
+  To prevent backwards incompatible changes when it is specified, these links are removed. (#1726)
+- Setting error status while recording error with Span from oteltest package. (#1729)
+- The concept of a remote and local Span stored in a context is unified to just the current Span.
+  Because of this `"go.opentelemetry.io/otel/trace".RemoteSpanContextFromContext` is removed as it is no longer needed.
+  Instead, `"go.opentelemetry.io/otel/trace".SpanContextFromContex` can be used to return the current Span.
+  If needed, that Span's `SpanContext.IsRemote()` can then be used to determine if it is remote or not. (#1731)
+- The `HasRemoteParent` field of the `"go.opentelemetry.io/otel/sdk/trace".SamplingParameters` is removed.
+  This field is redundant to the information returned from the `Remote` method of the `SpanContext` held in the `ParentContext` field. (#1749)
+- The `trace.FlagsDebug` and `trace.FlagsDeferred` constants have been removed and will be localized to the B3 propagator. (#1770)
+- Remove `Process` configuration, `WithProcessFromEnv` and `ProcessFromEnv`, and type from the Jaeger exporter package.
+  The information that could be configured in the `Process` struct should be configured in a `Resource` instead. (#1776, #1804)
+- Remove the `WithDisabled` option from the Jaeger exporter.
+  To disable the exporter unregister it from the `TracerProvider` or use a no-operation `TracerProvider`. (#1806)
+- Removed the functions `CollectorEndpointFromEnv` and `WithCollectorEndpointOptionFromEnv` from the Jaeger exporter.
+  These functions for retrieving specific environment variable values are redundant of other internal functions and
+  are not intended for end user use. (#1824)
+- Removed the Jaeger exporter `WithSDKOptions` `Option`.
+  This option was used to set SDK options for the exporter creation convenience functions.
+  These functions are provided as a way to easily setup or install the exporter with what are deemed reasonable SDK settings for common use cases.
+  If the SDK needs to be configured differently, the `NewRawExporter` function and direct setup of the SDK with the desired settings should be used. (#1825)
+- The `WithBufferMaxCount` and `WithBatchMaxCount` `Option`s from the Jaeger exporter are removed.
+  The exporter no longer batches exports, instead relying on the SDK's `BatchSpanProcessor` for this functionality. (#1830)
+- The Jaeger exporter `Option` type is removed.
+  The type is no longer used by the exporter to configure anything.
+  All the previous configurations these options provided were duplicates of SDK configuration.
+  They have been removed in favor of using the SDK configuration and focuses the exporter configuration to be only about the endpoints it will send telemetry to. (#1830)
+
+## [0.19.0] - 2021-03-18
+
+### Added
+
+- Added `Marshaler` config option to `otlphttp` to enable otlp over json or protobufs. (#1586)
+- A `ForceFlush` method to the `"go.opentelemetry.io/otel/sdk/trace".TracerProvider` to flush all registered `SpanProcessor`s. (#1608)
+- Added `WithSampler` and `WithSpanLimits` to tracer provider. (#1633, #1702)
+- `"go.opentelemetry.io/otel/trace".SpanContext` now has a `remote` property, and `IsRemote()` predicate, that is true when the `SpanContext` has been extracted from remote context data. (#1701)
+- A `Valid` method to the `"go.opentelemetry.io/otel/attribute".KeyValue` type. (#1703)
+
+### Changed
+
+- `trace.SpanContext` is now immutable and has no exported fields. (#1573)
+  - `trace.NewSpanContext()` can be used in conjunction with the `trace.SpanContextConfig` struct to initialize a new `SpanContext` where all values are known.
+- Update the `ForceFlush` method signature to the `"go.opentelemetry.io/otel/sdk/trace".SpanProcessor` to accept a `context.Context` and return an error. (#1608)
+- Update the `Shutdown` method to the `"go.opentelemetry.io/otel/sdk/trace".TracerProvider` return an error on shutdown failure. (#1608)
+- The SimpleSpanProcessor will now shut down the enclosed `SpanExporter` and gracefully ignore subsequent calls to `OnEnd` after `Shutdown` is called. (#1612)
+- `"go.opentelemetry.io/sdk/metric/controller.basic".WithPusher` is replaced with `WithExporter` to provide consistent naming across project. (#1656)
+- Added non-empty string check for trace `Attribute` keys. (#1659)
+- Add `description` to SpanStatus only when `StatusCode` is set to error. (#1662)
+- Jaeger exporter falls back to `resource.Default`'s `service.name` if the exported Span does not have one. (#1673)
+- Jaeger exporter populates Jaeger's Span Process from Resource. (#1673)
+- Renamed the `LabelSet` method of `"go.opentelemetry.io/otel/sdk/resource".Resource` to `Set`. (#1692)
+- Changed `WithSDK` to `WithSDKOptions` to accept variadic arguments of `TracerProviderOption` type in `go.opentelemetry.io/otel/exporters/trace/jaeger` package. (#1693)
+- Changed `WithSDK` to `WithSDKOptions` to accept variadic arguments of `TracerProviderOption` type in `go.opentelemetry.io/otel/exporters/trace/zipkin` package. (#1693)
+
+### Removed
+
+- Removed `serviceName` parameter from Zipkin exporter and uses resource instead. (#1549)
+- Removed `WithConfig` from tracer provider to avoid overriding configuration. (#1633)
+- Removed the exported `SimpleSpanProcessor` and `BatchSpanProcessor` structs.
+   These are now returned as a SpanProcessor interface from their respective constructors. (#1638)
+- Removed `WithRecord()` from `trace.SpanOption` when creating a span. (#1660)
+- Removed setting status to `Error` while recording an error as a span event in `RecordError`. (#1663)
+- Removed `jaeger.WithProcess` configuration option. (#1673)
+- Removed `ApplyConfig` method from `"go.opentelemetry.io/otel/sdk/trace".TracerProvider` and the now unneeded `Config` struct. (#1693)
+
+### Fixed
+
+- Jaeger Exporter: Ensure mapping between OTEL and Jaeger span data complies with the specification. (#1626)
+- `SamplingResult.TraceState` is correctly propagated to a newly created span's `SpanContext`. (#1655)
+- The `otel-collector` example now correctly flushes metric events prior to shutting down the exporter. (#1678)
+- Do not set span status message in `SpanStatusFromHTTPStatusCode` if it can be inferred from `http.status_code`. (#1681)
+- Synchronization issues in global trace delegate implementation. (#1686)
+- Reduced excess memory usage by global `TracerProvider`. (#1687)
+
+## [0.18.0] - 2021-03-03
+
+### Added
+
+- Added `resource.Default()` for use with meter and tracer providers. (#1507)
+- `AttributePerEventCountLimit` and `AttributePerLinkCountLimit` for `SpanLimits`. (#1535)
+- Added `Keys()` method to `propagation.TextMapCarrier` and `propagation.HeaderCarrier` to adapt `http.Header` to this interface. (#1544)
+- Added `code` attributes to `go.opentelemetry.io/otel/semconv` package. (#1558)
+- Compatibility testing suite in the CI system for the following systems. (#1567)
+   | OS      | Go Version | Architecture |
+   | ------- | ---------- | ------------ |
+   | Ubuntu  | 1.15       | amd64        |
+   | Ubuntu  | 1.14       | amd64        |
+   | Ubuntu  | 1.15       | 386          |
+   | Ubuntu  | 1.14       | 386          |
+   | MacOS   | 1.15       | amd64        |
+   | MacOS   | 1.14       | amd64        |
+   | Windows | 1.15       | amd64        |
+   | Windows | 1.14       | amd64        |
+   | Windows | 1.15       | 386          |
+   | Windows | 1.14       | 386          |
+
+### Changed
+
+- Replaced interface `oteltest.SpanRecorder` with its existing implementation
+  `StandardSpanRecorder`. (#1542)
+- Default span limit values to 128. (#1535)
+- Rename `MaxEventsPerSpan`, `MaxAttributesPerSpan` and `MaxLinksPerSpan` to `EventCountLimit`, `AttributeCountLimit` and `LinkCountLimit`, and move these fields into `SpanLimits`. (#1535)
+- Renamed the `otel/label` package to `otel/attribute`. (#1541)
+- Vendor the Jaeger exporter's dependency on Apache Thrift. (#1551)
+- Parallelize the CI linting and testing. (#1567)
+- Stagger timestamps in exact aggregator tests. (#1569)
+- Changed all examples to use `WithBatchTimeout(5 * time.Second)` rather than `WithBatchTimeout(5)`. (#1621)
+- Prevent end-users from implementing some interfaces (#1575)
+
+  ```
+      "otel/exporters/otlp/otlphttp".Option
+      "otel/exporters/stdout".Option
+      "otel/oteltest".Option
+      "otel/trace".TracerOption
+      "otel/trace".SpanOption
+      "otel/trace".EventOption
+      "otel/trace".LifeCycleOption
+      "otel/trace".InstrumentationOption
+      "otel/sdk/resource".Option
+      "otel/sdk/trace".ParentBasedSamplerOption
+      "otel/sdk/trace".ReadOnlySpan
+      "otel/sdk/trace".ReadWriteSpan
+  ```
+
+### Removed
+
+- Removed attempt to resample spans upon changing the span name with `span.SetName()`. (#1545)
+- The `test-benchmark` is no longer a dependency of the `precommit` make target. (#1567)
+- Removed the `test-386` make target.
+   This was replaced with a full compatibility testing suite (i.e. multi OS/arch) in the CI system. (#1567)
+
+### Fixed
+
+- The sequential timing check of timestamps in the stdout exporter are now setup explicitly to be sequential (#1571). (#1572)
+- Windows build of Jaeger tests now compiles with OS specific functions (#1576). (#1577)
+- The sequential timing check of timestamps of go.opentelemetry.io/otel/sdk/metric/aggregator/lastvalue are now setup explicitly to be sequential (#1578). (#1579)
+- Validate tracestate header keys with vendors according to the W3C TraceContext specification (#1475). (#1581)
+- The OTLP exporter includes related labels for translations of a GaugeArray (#1563). (#1570)
+
+## [0.17.0] - 2021-02-12
+
+### Changed
+
+- Rename project default branch from `master` to `main`. (#1505)
+- Reverse order in which `Resource` attributes are merged, per change in spec. (#1501)
+- Add tooling to maintain "replace" directives in go.mod files automatically. (#1528)
+- Create new modules: otel/metric, otel/trace, otel/oteltest, otel/sdk/export/metric, otel/sdk/metric (#1528)
+- Move metric-related public global APIs from otel to otel/metric/global. (#1528)
+
+## Fixed
+
+- Fixed otlpgrpc reconnection issue.
+- The example code in the README.md of `go.opentelemetry.io/otel/exporters/otlp` is moved to a compiled example test and used the new `WithAddress` instead of `WithEndpoint`. (#1513)
+- The otel-collector example now uses the default OTLP receiver port of the collector.
+
+## [0.16.0] - 2021-01-13
+
+### Added
+
+- Add the `ReadOnlySpan` and `ReadWriteSpan` interfaces to provide better control for accessing span data. (#1360)
+- `NewGRPCDriver` function returns a `ProtocolDriver` that maintains a single gRPC connection to the collector. (#1369)
+- Added documentation about the project's versioning policy. (#1388)
+- Added `NewSplitDriver` for OTLP exporter that allows sending traces and metrics to different endpoints. (#1418)
+- Added codeql worfklow to GitHub Actions (#1428)
+- Added Gosec workflow to GitHub Actions (#1429)
+- Add new HTTP driver for OTLP exporter in `exporters/otlp/otlphttp`. Currently it only supports the binary protobuf payloads. (#1420)
+- Add an OpenCensus exporter bridge. (#1444)
+
+### Changed
+
+- Rename `internal/testing` to `internal/internaltest`. (#1449)
+- Rename `export.SpanData` to `export.SpanSnapshot` and use it only for exporting spans. (#1360)
+- Store the parent's full `SpanContext` rather than just its span ID in the `span` struct. (#1360)
+- Improve span duration accuracy. (#1360)
+- Migrated CI/CD from CircleCI to GitHub Actions (#1382)
+- Remove duplicate checkout from GitHub Actions workflow (#1407)
+- Metric `array` aggregator renamed `exact` to match its `aggregation.Kind` (#1412)
+- Metric `exact` aggregator includes per-point timestamps (#1412)
+- Metric stdout exporter uses MinMaxSumCount aggregator for ValueRecorder instruments (#1412)
+- `NewExporter` from `exporters/otlp` now takes a `ProtocolDriver` as a parameter. (#1369)
+- Many OTLP Exporter options became gRPC ProtocolDriver options. (#1369)
+- Unify endpoint API that related to OTel exporter. (#1401)
+- Optimize metric histogram aggregator to re-use its slice of buckets. (#1435)
+- Metric aggregator Count() and histogram Bucket.Counts are consistently `uint64`. (1430)
+- Histogram aggregator accepts functional options, uses default boundaries if none given. (#1434)
+- `SamplingResult` now passed a `Tracestate` from the parent `SpanContext` (#1432)
+- Moved gRPC driver for OTLP exporter to `exporters/otlp/otlpgrpc`. (#1420)
+- The `TraceContext` propagator now correctly propagates `TraceState` through the `SpanContext`. (#1447)
+- Metric Push and Pull Controller components are combined into a single "basic" Controller:
+  - `WithExporter()` and `Start()` to configure Push behavior
+  - `Start()` is optional; use `Collect()` and `ForEach()` for Pull behavior
+  - `Start()` and `Stop()` accept Context. (#1378)
+- The `Event` type is moved from the `otel/sdk/export/trace` package to the `otel/trace` API package. (#1452)
+
+### Removed
+
+- Remove `errUninitializedSpan` as its only usage is now obsolete. (#1360)
+- Remove Metric export functionality related to quantiles and summary data points: this is not specified (#1412)
+- Remove DDSketch metric aggregator; our intention is to re-introduce this as an option of the histogram aggregator after [new OTLP histogram data types](https://github.com/open-telemetry/opentelemetry-proto/pull/226) are released (#1412)
+
+### Fixed
+
+- `BatchSpanProcessor.Shutdown()` will now shutdown underlying `export.SpanExporter`. (#1443)
+
+## [0.15.0] - 2020-12-10
+
+### Added
+
+- The `WithIDGenerator` `TracerProviderOption` is added to the `go.opentelemetry.io/otel/trace` package to configure an `IDGenerator` for the `TracerProvider`. (#1363)
+
+### Changed
+
+- The Zipkin exporter now uses the Span status code to determine. (#1328)
+- `NewExporter` and `Start` functions in `go.opentelemetry.io/otel/exporters/otlp` now receive `context.Context` as a first parameter. (#1357)
+- Move the OpenCensus example into `example` directory. (#1359)
+- Moved the SDK's `internal.IDGenerator` interface in to the `sdk/trace` package to enable support for externally-defined ID generators. (#1363)
+- Bump `github.com/google/go-cmp` from 0.5.3 to 0.5.4 (#1374)
+- Bump `github.com/golangci/golangci-lint` in `/internal/tools` (#1375)
+
+### Fixed
+
+- Metric SDK `SumObserver` and `UpDownSumObserver` instruments correctness fixes. (#1381)
+
+## [0.14.0] - 2020-11-19
+
+### Added
+
+- An `EventOption` and the related `NewEventConfig` function are added to the `go.opentelemetry.io/otel` package to configure Span events. (#1254)
+- A `TextMapPropagator` and associated `TextMapCarrier` are added to the `go.opentelemetry.io/otel/oteltest` package to test `TextMap` type propagators and their use. (#1259)
+- `SpanContextFromContext` returns `SpanContext` from context. (#1255)
+- `TraceState` has been added to `SpanContext`. (#1340)
+- `DeploymentEnvironmentKey` added to `go.opentelemetry.io/otel/semconv` package. (#1323)
+- Add an OpenCensus to OpenTelemetry tracing bridge. (#1305)
+- Add a parent context argument to `SpanProcessor.OnStart` to follow the specification. (#1333)
+- Add missing tests for `sdk/trace/attributes_map.go`. (#1337)
+
+### Changed
+
+- Move the `go.opentelemetry.io/otel/api/trace` package into `go.opentelemetry.io/otel/trace` with the following changes. (#1229) (#1307)
+  - `ID` has been renamed to `TraceID`.
+  - `IDFromHex` has been renamed to `TraceIDFromHex`.
+  - `EmptySpanContext` is removed.
+- Move the `go.opentelemetry.io/otel/api/trace/tracetest` package into `go.opentelemetry.io/otel/oteltest`. (#1229)
+- OTLP Exporter updates:
+  - supports OTLP v0.6.0 (#1230, #1354)
+  - supports configurable aggregation temporality (default: Cumulative, optional: Stateless). (#1296)
+- The Sampler is now called on local child spans. (#1233)
+- The `Kind` type from the `go.opentelemetry.io/otel/api/metric` package was renamed to `InstrumentKind` to more specifically describe what it is and avoid semantic ambiguity. (#1240)
+- The `MetricKind` method of the `Descriptor` type in the `go.opentelemetry.io/otel/api/metric` package was renamed to `Descriptor.InstrumentKind`.
+   This matches the returned type and fixes misuse of the term metric. (#1240)
+- Move test harness from the `go.opentelemetry.io/otel/api/apitest` package into `go.opentelemetry.io/otel/oteltest`. (#1241)
+- Move the `go.opentelemetry.io/otel/api/metric/metrictest` package into `go.opentelemetry.io/oteltest` as part of #964. (#1252)
+- Move the `go.opentelemetry.io/otel/api/metric` package into `go.opentelemetry.io/otel/metric` as part of #1303. (#1321)
+- Move the `go.opentelemetry.io/otel/api/metric/registry` package into `go.opentelemetry.io/otel/metric/registry` as a part of #1303. (#1316)
+- Move the `Number` type (together with related functions) from `go.opentelemetry.io/otel/api/metric` package into `go.opentelemetry.io/otel/metric/number` as a part of #1303. (#1316)
+- The function signature of the Span `AddEvent` method in `go.opentelemetry.io/otel` is updated to no longer take an unused context and instead take a required name and a variable number of `EventOption`s. (#1254)
+- The function signature of the Span `RecordError` method in `go.opentelemetry.io/otel` is updated to no longer take an unused context and instead take a required error value and a variable number of `EventOption`s. (#1254)
+- Move the `go.opentelemetry.io/otel/api/global` package to `go.opentelemetry.io/otel`. (#1262) (#1330)
+- Move the `Version` function from `go.opentelemetry.io/otel/sdk` to `go.opentelemetry.io/otel`. (#1330)
+- Rename correlation context header from `"otcorrelations"` to `"baggage"` to match the OpenTelemetry specification. (#1267)
+- Fix `Code.UnmarshalJSON` to work with valid JSON only. (#1276)
+- The `resource.New()` method changes signature to support builtin attributes and functional options, including `telemetry.sdk.*` and
+  `host.name` semantic conventions; the former method is renamed `resource.NewWithAttributes`. (#1235)
+- The Prometheus exporter now exports non-monotonic counters (i.e. `UpDownCounter`s) as gauges. (#1210)
+- Correct the `Span.End` method documentation in the `otel` API to state updates are not allowed on a span after it has ended. (#1310)
+- Updated span collection limits for attribute, event and link counts to 1000 (#1318)
+- Renamed `semconv.HTTPUrlKey` to `semconv.HTTPURLKey`. (#1338)
+
+### Removed
+
+- The `ErrInvalidHexID`, `ErrInvalidTraceIDLength`, `ErrInvalidSpanIDLength`, `ErrInvalidSpanIDLength`, or `ErrNilSpanID` from the `go.opentelemetry.io/otel` package are unexported now. (#1243)
+- The `AddEventWithTimestamp` method on the `Span` interface in `go.opentelemetry.io/otel` is removed due to its redundancy.
+   It is replaced by using the `AddEvent` method with a `WithTimestamp` option. (#1254)
+- The `MockSpan` and `MockTracer` types are removed from `go.opentelemetry.io/otel/oteltest`.
+   `Tracer` and `Span` from the same module should be used in their place instead. (#1306)
+- `WorkerCount` option is removed from `go.opentelemetry.io/otel/exporters/otlp`. (#1350)
+- Remove the following labels types: INT32, UINT32, UINT64 and FLOAT32. (#1314)
+
+### Fixed
+
+- Rename `MergeItererator` to `MergeIterator` in the `go.opentelemetry.io/otel/label` package. (#1244)
+- The `go.opentelemetry.io/otel/api/global` packages global TextMapPropagator now delegates functionality to a globally set delegate for all previously returned propagators. (#1258)
+- Fix condition in `label.Any`. (#1299)
+- Fix global `TracerProvider` to pass options to its configured provider. (#1329)
+- Fix missing handler for `ExactKind` aggregator in OTLP metrics transformer (#1309)
+
+## [0.13.0] - 2020-10-08
+
+### Added
+
+- OTLP Metric exporter supports Histogram aggregation. (#1209)
+- The `Code` struct from the `go.opentelemetry.io/otel/codes` package now supports JSON marshaling and unmarshaling as well as implements the `Stringer` interface. (#1214)
+- A Baggage API to implement the OpenTelemetry specification. (#1217)
+- Add Shutdown method to sdk/trace/provider, shutdown processors in the order they were registered. (#1227)
+
+### Changed
+
+- Set default propagator to no-op propagator. (#1184)
+- The `HTTPSupplier`, `HTTPExtractor`, `HTTPInjector`, and `HTTPPropagator` from the `go.opentelemetry.io/otel/api/propagation` package were replaced with unified `TextMapCarrier` and `TextMapPropagator` in the `go.opentelemetry.io/otel/propagation` package. (#1212) (#1325)
+- The `New` function from the `go.opentelemetry.io/otel/api/propagation` package was replaced with `NewCompositeTextMapPropagator` in the `go.opentelemetry.io/otel` package. (#1212)
+- The status codes of the `go.opentelemetry.io/otel/codes` package have been updated to match the latest OpenTelemetry specification.
+   They now are `Unset`, `Error`, and `Ok`.
+   They no longer track the gRPC codes. (#1214)
+- The `StatusCode` field of the `SpanData` struct in the `go.opentelemetry.io/otel/sdk/export/trace` package now uses the codes package from this package instead of the gRPC project. (#1214)
+- Move the `go.opentelemetry.io/otel/api/baggage` package into `go.opentelemetry.io/otel/baggage`. (#1217) (#1325)
+- A `Shutdown` method of `SpanProcessor` and all its implementations receives a context and returns an error. (#1264)
+
+### Fixed
+
+- Copies of data from arrays and slices passed to `go.opentelemetry.io/otel/label.ArrayValue()` are now used in the returned `Value` instead of using the mutable data itself. (#1226)
+
+### Removed
+
+- The `ExtractHTTP` and `InjectHTTP` functions from the `go.opentelemetry.io/otel/api/propagation` package were removed. (#1212)
+- The `Propagators` interface from the `go.opentelemetry.io/otel/api/propagation` package was removed to conform to the OpenTelemetry specification.
+   The explicit `TextMapPropagator` type can be used in its place as this is the `Propagator` type the specification defines. (#1212)
+- The `SetAttribute` method of the `Span` from the `go.opentelemetry.io/otel/api/trace` package was removed given its redundancy with the `SetAttributes` method. (#1216)
+- The internal implementation of Baggage storage is removed in favor of using the new Baggage API functionality. (#1217)
+- Remove duplicate hostname key `HostHostNameKey` in Resource semantic conventions. (#1219)
+- Nested array/slice support has been removed. (#1226)
+
+## [0.12.0] - 2020-09-24
+
+### Added
+
+- A `SpanConfigure` function in `go.opentelemetry.io/otel/api/trace` to create a new `SpanConfig` from `SpanOption`s. (#1108)
+- In the `go.opentelemetry.io/otel/api/trace` package, `NewTracerConfig` was added to construct new `TracerConfig`s.
+   This addition was made to conform with our project option conventions. (#1155)
+- Instrumentation library information was added to the Zipkin exporter. (#1119)
+- The `SpanProcessor` interface now has a `ForceFlush()` method. (#1166)
+- More semantic conventions for k8s as resource attributes. (#1167)
+
+### Changed
+
+- Add reconnecting udp connection type to Jaeger exporter.
+   This change adds a new optional implementation of the udp conn interface used to detect changes to an agent's host dns record.
+   It then adopts the new destination address to ensure the exporter doesn't get stuck. This change was ported from jaegertracing/jaeger-client-go#520. (#1063)
+- Replace `StartOption` and `EndOption` in `go.opentelemetry.io/otel/api/trace` with `SpanOption`.
+   This change is matched by replacing the `StartConfig` and `EndConfig` with a unified `SpanConfig`. (#1108)
+- Replace the `LinkedTo` span option in `go.opentelemetry.io/otel/api/trace` with `WithLinks`.
+   This is be more consistent with our other option patterns, i.e. passing the item to be configured directly instead of its component parts, and provides a cleaner function signature. (#1108)
+- The `go.opentelemetry.io/otel/api/trace` `TracerOption` was changed to an interface to conform to project option conventions. (#1109)
+- Move the `B3` and `TraceContext` from within the `go.opentelemetry.io/otel/api/trace` package to their own `go.opentelemetry.io/otel/propagators` package.
+    This removal of the propagators is reflective of the OpenTelemetry specification for these propagators as well as cleans up the `go.opentelemetry.io/otel/api/trace` API. (#1118)
+- Rename Jaeger tags used for instrumentation library information to reflect changes in OpenTelemetry specification. (#1119)
+- Rename `ProbabilitySampler` to `TraceIDRatioBased` and change semantics to ignore parent span sampling status. (#1115)
+- Move `tools` package under `internal`. (#1141)
+- Move `go.opentelemetry.io/otel/api/correlation` package to `go.opentelemetry.io/otel/api/baggage`. (#1142)
+   The `correlation.CorrelationContext` propagator has been renamed `baggage.Baggage`.  Other exported functions and types are unchanged.
+- Rename `ParentOrElse` sampler to `ParentBased` and allow setting samplers depending on parent span. (#1153)
+- In the `go.opentelemetry.io/otel/api/trace` package, `SpanConfigure` was renamed to `NewSpanConfig`. (#1155)
+- Change `dependabot.yml` to add a `Skip Changelog` label to dependabot-sourced PRs. (#1161)
+- The [configuration style guide](https://github.com/open-telemetry/opentelemetry-go/blob/master/CONTRIBUTING.md#config) has been updated to
+   recommend the use of `newConfig()` instead of `configure()`. (#1163)
+- The `otlp.Config` type has been unexported and changed to `otlp.config`, along with its initializer. (#1163)
+- Ensure exported interface types include parameter names and update the
+   Style Guide to reflect this styling rule. (#1172)
+- Don't consider unset environment variable for resource detection to be an error. (#1170)
+- Rename `go.opentelemetry.io/otel/api/metric.ConfigureInstrument` to `NewInstrumentConfig` and
+  `go.opentelemetry.io/otel/api/metric.ConfigureMeter` to `NewMeterConfig`.
+- ValueObserver instruments use LastValue aggregator by default. (#1165)
+- OTLP Metric exporter supports LastValue aggregation. (#1165)
+- Move the `go.opentelemetry.io/otel/api/unit` package to `go.opentelemetry.io/otel/unit`. (#1185)
+- Rename `Provider` to `MeterProvider` in the `go.opentelemetry.io/otel/api/metric` package. (#1190)
+- Rename `NoopProvider` to `NoopMeterProvider` in the `go.opentelemetry.io/otel/api/metric` package. (#1190)
+- Rename `NewProvider` to `NewMeterProvider` in the `go.opentelemetry.io/otel/api/metric/metrictest` package. (#1190)
+- Rename `Provider` to `MeterProvider` in the `go.opentelemetry.io/otel/api/metric/registry` package. (#1190)
+- Rename `NewProvider` to `NewMeterProvider` in the `go.opentelemetry.io/otel/api/metri/registryc` package. (#1190)
+- Rename `Provider` to `TracerProvider` in the `go.opentelemetry.io/otel/api/trace` package. (#1190)
+- Rename `NoopProvider` to `NoopTracerProvider` in the `go.opentelemetry.io/otel/api/trace` package. (#1190)
+- Rename `Provider` to `TracerProvider` in the `go.opentelemetry.io/otel/api/trace/tracetest` package. (#1190)
+- Rename `NewProvider` to `NewTracerProvider` in the `go.opentelemetry.io/otel/api/trace/tracetest` package. (#1190)
+- Rename `WrapperProvider` to `WrapperTracerProvider` in the `go.opentelemetry.io/otel/bridge/opentracing` package. (#1190)
+- Rename `NewWrapperProvider` to `NewWrapperTracerProvider` in the `go.opentelemetry.io/otel/bridge/opentracing` package. (#1190)
+- Rename `Provider` method of the pull controller to `MeterProvider` in the `go.opentelemetry.io/otel/sdk/metric/controller/pull` package. (#1190)
+- Rename `Provider` method of the push controller to `MeterProvider` in the `go.opentelemetry.io/otel/sdk/metric/controller/push` package. (#1190)
+- Rename `ProviderOptions` to `TracerProviderConfig` in the `go.opentelemetry.io/otel/sdk/trace` package. (#1190)
+- Rename `ProviderOption` to `TracerProviderOption` in the `go.opentelemetry.io/otel/sdk/trace` package. (#1190)
+- Rename `Provider` to `TracerProvider` in the `go.opentelemetry.io/otel/sdk/trace` package. (#1190)
+- Rename `NewProvider` to `NewTracerProvider` in the `go.opentelemetry.io/otel/sdk/trace` package. (#1190)
+- Renamed `SamplingDecision` values to comply with OpenTelemetry specification change. (#1192)
+- Renamed Zipkin attribute names from `ot.status_code & ot.status_description` to `otel.status_code & otel.status_description`. (#1201)
+- The default SDK now invokes registered `SpanProcessor`s in the order they were registered with the `TracerProvider`. (#1195)
+- Add test of spans being processed by the `SpanProcessor`s in the order they were registered. (#1203)
+
+### Removed
+
+- Remove the B3 propagator from `go.opentelemetry.io/otel/propagators`. It is now located in the
+   `go.opentelemetry.io/contrib/propagators/` module. (#1191)
+- Remove the semantic convention for HTTP status text, `HTTPStatusTextKey` from package `go.opentelemetry.io/otel/semconv`. (#1194)
+
+### Fixed
+
+- Zipkin example no longer mentions `ParentSampler`, corrected to `ParentBased`. (#1171)
+- Fix missing shutdown processor in otel-collector example. (#1186)
+- Fix missing shutdown processor in basic and namedtracer examples. (#1197)
+
+## [0.11.0] - 2020-08-24
+
+### Added
+
+- Support for exporting array-valued attributes via OTLP. (#992)
+- `Noop` and `InMemory` `SpanBatcher` implementations to help with testing integrations. (#994)
+- Support for filtering metric label sets. (#1047)
+- A dimensionality-reducing metric Processor. (#1057)
+- Integration tests for more OTel Collector Attribute types. (#1062)
+- A new `WithSpanProcessor` `ProviderOption` is added to the `go.opentelemetry.io/otel/sdk/trace` package to create a `Provider` and automatically register the `SpanProcessor`. (#1078)
+
+### Changed
+
+- Rename `sdk/metric/processor/test` to `sdk/metric/processor/processortest`. (#1049)
+- Rename `sdk/metric/controller/test` to `sdk/metric/controller/controllertest`. (#1049)
+- Rename `api/testharness` to `api/apitest`. (#1049)
+- Rename `api/trace/testtrace` to `api/trace/tracetest`. (#1049)
+- Change Metric Processor to merge multiple observations. (#1024)
+- The `go.opentelemetry.io/otel/bridge/opentracing` bridge package has been made into its own module.
+   This removes the package dependencies of this bridge from the rest of the OpenTelemetry based project. (#1038)
+- Renamed `go.opentelemetry.io/otel/api/standard` package to `go.opentelemetry.io/otel/semconv` to avoid the ambiguous and generic name `standard` and better describe the package as containing OpenTelemetry semantic conventions. (#1016)
+- The environment variable used for resource detection has been changed from `OTEL_RESOURCE_LABELS` to `OTEL_RESOURCE_ATTRIBUTES` (#1042)
+- Replace `WithSyncer` with `WithBatcher` in examples. (#1044)
+- Replace the `google.golang.org/grpc/codes` dependency in the API with an equivalent `go.opentelemetry.io/otel/codes` package. (#1046)
+- Merge the `go.opentelemetry.io/otel/api/label` and `go.opentelemetry.io/otel/api/kv` into the new `go.opentelemetry.io/otel/label` package. (#1060)
+- Unify Callback Function Naming.
+   Rename `*Callback` with `*Func`. (#1061)
+- CI builds validate against last two versions of Go, dropping 1.13 and adding 1.15. (#1064)
+- The `go.opentelemetry.io/otel/sdk/export/trace` interfaces `SpanSyncer` and `SpanBatcher` have been replaced with a specification compliant `Exporter` interface.
+   This interface still supports the export of `SpanData`, but only as a slice.
+   Implementation are also required now to return any error from `ExportSpans` if one occurs as well as implement a `Shutdown` method for exporter clean-up. (#1078)
+- The `go.opentelemetry.io/otel/sdk/trace` `NewBatchSpanProcessor` function no longer returns an error.
+   If a `nil` exporter is passed as an argument to this function, instead of it returning an error, it now returns a `BatchSpanProcessor` that handles the export of `SpanData` by not taking any action. (#1078)
+- The `go.opentelemetry.io/otel/sdk/trace` `NewProvider` function to create a `Provider` no longer returns an error, instead only a `*Provider`.
+   This change is related to `NewBatchSpanProcessor` not returning an error which was the only error this function would return. (#1078)
+
+### Removed
+
+- Duplicate, unused API sampler interface. (#999)
+   Use the [`Sampler` interface](https://github.com/open-telemetry/opentelemetry-go/blob/v0.11.0/sdk/trace/sampling.go) provided by the SDK instead.
+- The `grpctrace` instrumentation was moved to the `go.opentelemetry.io/contrib` repository and out of this repository.
+   This move includes moving the `grpc` example to the `go.opentelemetry.io/contrib` as well. (#1027)
+- The `WithSpan` method of the `Tracer` interface.
+   The functionality this method provided was limited compared to what a user can provide themselves.
+   It was removed with the understanding that if there is sufficient user need it can be added back based on actual user usage. (#1043)
+- The `RegisterSpanProcessor` and `UnregisterSpanProcessor` functions.
+   These were holdovers from an approach prior to the TracerProvider design. They were not used anymore. (#1077)
+- The `oterror` package. (#1026)
+- The `othttp` and `httptrace` instrumentations were moved to `go.opentelemetry.io/contrib`. (#1032)
+
+### Fixed
+
+- The `semconv.HTTPServerMetricAttributesFromHTTPRequest()` function no longer generates the high-cardinality `http.request.content.length` label. (#1031)
+- Correct instrumentation version tag in Jaeger exporter. (#1037)
+- The SDK span will now set an error event if the `End` method is called during a panic (i.e. it was deferred). (#1043)
+- Move internally generated protobuf code from the `go.opentelemetry.io/otel` to the OTLP exporter to reduce dependency overhead. (#1050)
+- The `otel-collector` example referenced outdated collector processors. (#1006)
+
+## [0.10.0] - 2020-07-29
+
+This release migrates the default OpenTelemetry SDK into its own Go module, decoupling the SDK from the API and reducing dependencies for instrumentation packages.
+
+### Added
+
+- The Zipkin exporter now has `NewExportPipeline` and `InstallNewPipeline` constructor functions to match the common pattern.
+    These function build a new exporter with default SDK options and register the exporter with the `global` package respectively. (#944)
+- Add propagator option for gRPC instrumentation. (#986)
+- The `testtrace` package now tracks the `trace.SpanKind` for each span. (#987)
+
+### Changed
+
+- Replace the `RegisterGlobal` `Option` in the Jaeger exporter with an `InstallNewPipeline` constructor function.
+   This matches the other exporter constructor patterns and will register a new exporter after building it with default configuration. (#944)
+- The trace (`go.opentelemetry.io/otel/exporters/trace/stdout`) and metric (`go.opentelemetry.io/otel/exporters/metric/stdout`) `stdout` exporters are now merged into a single exporter at `go.opentelemetry.io/otel/exporters/stdout`.
+   This new exporter was made into its own Go module to follow the pattern of all exporters and decouple it from the `go.opentelemetry.io/otel` module. (#956, #963)
+- Move the `go.opentelemetry.io/otel/exporters/test` test package to `go.opentelemetry.io/otel/sdk/export/metric/metrictest`. (#962)
+- The `go.opentelemetry.io/otel/api/kv/value` package was merged into the parent `go.opentelemetry.io/otel/api/kv` package. (#968)
+  - `value.Bool` was replaced with `kv.BoolValue`.
+  - `value.Int64` was replaced with `kv.Int64Value`.
+  - `value.Uint64` was replaced with `kv.Uint64Value`.
+  - `value.Float64` was replaced with `kv.Float64Value`.
+  - `value.Int32` was replaced with `kv.Int32Value`.
+  - `value.Uint32` was replaced with `kv.Uint32Value`.
+  - `value.Float32` was replaced with `kv.Float32Value`.
+  - `value.String` was replaced with `kv.StringValue`.
+  - `value.Int` was replaced with `kv.IntValue`.
+  - `value.Uint` was replaced with `kv.UintValue`.
+  - `value.Array` was replaced with `kv.ArrayValue`.
+- Rename `Infer` to `Any` in the `go.opentelemetry.io/otel/api/kv` package. (#972)
+- Change `othttp` to use the `httpsnoop` package to wrap the `ResponseWriter` so that optional interfaces (`http.Hijacker`, `http.Flusher`, etc.) that are implemented by the original `ResponseWriter`are also implemented by the wrapped `ResponseWriter`. (#979)
+- Rename `go.opentelemetry.io/otel/sdk/metric/aggregator/test` package to `go.opentelemetry.io/otel/sdk/metric/aggregator/aggregatortest`. (#980)
+- Make the SDK into its own Go module called `go.opentelemetry.io/otel/sdk`. (#985)
+- Changed the default trace `Sampler` from `AlwaysOn` to `ParentOrElse(AlwaysOn)`. (#989)
+
+### Removed
+
+- The `IndexedAttribute` function from the `go.opentelemetry.io/otel/api/label` package was removed in favor of `IndexedLabel` which it was synonymous with. (#970)
+
+### Fixed
+
+- Bump github.com/golangci/golangci-lint from 1.28.3 to 1.29.0 in /tools. (#953)
+- Bump github.com/google/go-cmp from 0.5.0 to 0.5.1. (#957)
+- Use `global.Handle` for span export errors in the OTLP exporter. (#946)
+- Correct Go language formatting in the README documentation. (#961)
+- Remove default SDK dependencies from the `go.opentelemetry.io/otel/api` package. (#977)
+- Remove default SDK dependencies from the `go.opentelemetry.io/otel/instrumentation` package. (#983)
+- Move documented examples for `go.opentelemetry.io/otel/instrumentation/grpctrace` interceptors into Go example tests. (#984)
+
+## [0.9.0] - 2020-07-20
+
+### Added
+
+- A new Resource Detector interface is included to allow resources to be automatically detected and included. (#939)
+- A Detector to automatically detect resources from an environment variable. (#939)
+- Github action to generate protobuf Go bindings locally in `internal/opentelemetry-proto-gen`. (#938)
+- OTLP .proto files from `open-telemetry/opentelemetry-proto` imported as a git submodule under `internal/opentelemetry-proto`.
+   References to `github.com/open-telemetry/opentelemetry-proto` changed to `go.opentelemetry.io/otel/internal/opentelemetry-proto-gen`. (#942)
+
+### Changed
+
+- Non-nil value `struct`s for key-value pairs will be marshalled using JSON rather than `Sprintf`. (#948)
+
+### Removed
+
+- Removed dependency on `github.com/open-telemetry/opentelemetry-collector`. (#943)
+
+## [0.8.0] - 2020-07-09
+
+### Added
+
+- The `B3Encoding` type to represent the B3 encoding(s) the B3 propagator can inject.
+   A value for HTTP supported encodings (Multiple Header: `MultipleHeader`, Single Header: `SingleHeader`) are included. (#882)
+- The `FlagsDeferred` trace flag to indicate if the trace sampling decision has been deferred. (#882)
+- The `FlagsDebug` trace flag to indicate if the trace is a debug trace. (#882)
+- Add `peer.service` semantic attribute. (#898)
+- Add database-specific semantic attributes. (#899)
+- Add semantic convention for `faas.coldstart` and `container.id`. (#909)
+- Add http content size semantic conventions. (#905)
+- Include `http.request_content_length` in HTTP request basic attributes. (#905)
+- Add semantic conventions for operating system process resource attribute keys. (#919)
+- The Jaeger exporter now has a `WithBatchMaxCount` option to specify the maximum number of spans sent in a batch. (#931)
+
+### Changed
+
+- Update `CONTRIBUTING.md` to ask for updates to `CHANGELOG.md` with each pull request. (#879)
+- Use lowercase header names for B3 Multiple Headers. (#881)
+- The B3 propagator `SingleHeader` field has been replaced with `InjectEncoding`.
+   This new field can be set to combinations of the `B3Encoding` bitmasks and will inject trace information in these encodings.
+   If no encoding is set, the propagator will default to `MultipleHeader` encoding. (#882)
+- The B3 propagator now extracts from either HTTP encoding of B3 (Single Header or Multiple Header) based on what is contained in the header.
+   Preference is given to Single Header encoding with Multiple Header being the fallback if Single Header is not found or is invalid.
+   This behavior change is made to dynamically support all correctly encoded traces received instead of having to guess the expected encoding prior to receiving. (#882)
+- Extend semantic conventions for RPC. (#900)
+- To match constant naming conventions in the `api/standard` package, the `FaaS*` key names are appended with a suffix of `Key`. (#920)
+  - `"api/standard".FaaSName` -> `FaaSNameKey`
+  - `"api/standard".FaaSID` -> `FaaSIDKey`
+  - `"api/standard".FaaSVersion` -> `FaaSVersionKey`
+  - `"api/standard".FaaSInstance` -> `FaaSInstanceKey`
+
+### Removed
+
+- The `FlagsUnused` trace flag is removed.
+   The purpose of this flag was to act as the inverse of `FlagsSampled`, the inverse of `FlagsSampled` is used instead. (#882)
+- The B3 header constants (`B3SingleHeader`, `B3DebugFlagHeader`, `B3TraceIDHeader`, `B3SpanIDHeader`, `B3SampledHeader`, `B3ParentSpanIDHeader`) are removed.
+   If B3 header keys are needed [the authoritative OpenZipkin package constants](https://pkg.go.dev/github.com/openzipkin/zipkin-go@v0.2.2/propagation/b3?tab=doc#pkg-constants) should be used instead. (#882)
+
+### Fixed
+
+- The B3 Single Header name is now correctly `b3` instead of the previous `X-B3`. (#881)
+- The B3 propagator now correctly supports sampling only values (`b3: 0`, `b3: 1`, or `b3: d`) for a Single B3 Header. (#882)
+- The B3 propagator now propagates the debug flag.
+   This removes the behavior of changing the debug flag into a set sampling bit.
+   Instead, this now follow the B3 specification and omits the `X-B3-Sampling` header. (#882)
+- The B3 propagator now tracks "unset" sampling state (meaning "defer the decision") and does not set the `X-B3-Sampling` header when injecting. (#882)
+- Bump github.com/itchyny/gojq from 0.10.3 to 0.10.4 in /tools. (#883)
+- Bump github.com/opentracing/opentracing-go from v1.1.1-0.20190913142402-a7454ce5950e to v1.2.0. (#885)
+- The tracing time conversion for OTLP spans is now correctly set to `UnixNano`. (#896)
+- Ensure span status is not set to `Unknown` when no HTTP status code is provided as it is assumed to be `200 OK`. (#908)
+- Ensure `httptrace.clientTracer` closes `http.headers` span. (#912)
+- Prometheus exporter will not apply stale updates or forget inactive metrics. (#903)
+- Add test for api.standard `HTTPClientAttributesFromHTTPRequest`. (#905)
+- Bump github.com/golangci/golangci-lint from 1.27.0 to 1.28.1 in /tools. (#901, #913)
+- Update otel-colector example to use the v0.5.0 collector. (#915)
+- The `grpctrace` instrumentation uses a span name conforming to the OpenTelemetry semantic conventions (does not contain a leading slash (`/`)). (#922)
+- The `grpctrace` instrumentation includes an `rpc.method` attribute now set to the gRPC method name. (#900, #922)
+- The `grpctrace` instrumentation `rpc.service` attribute now contains the package name if one exists.
+   This is in accordance with OpenTelemetry semantic conventions. (#922)
+- Correlation Context extractor will no longer insert an empty map into the returned context when no valid values are extracted. (#923)
+- Bump google.golang.org/api from 0.28.0 to 0.29.0 in /exporters/trace/jaeger. (#925)
+- Bump github.com/itchyny/gojq from 0.10.4 to 0.11.0 in /tools. (#926)
+- Bump github.com/golangci/golangci-lint from 1.28.1 to 1.28.2 in /tools. (#930)
+
+## [0.7.0] - 2020-06-26
+
+This release implements the v0.5.0 version of the OpenTelemetry specification.
+
+### Added
+
+- The othttp instrumentation now includes default metrics. (#861)
+- This CHANGELOG file to track all changes in the project going forward.
+- Support for array type attributes. (#798)
+- Apply transitive dependabot go.mod dependency updates as part of a new automatic Github workflow. (#844)
+- Timestamps are now passed to exporters for each export. (#835)
+- Add new `Accumulation` type to metric SDK to transport telemetry from `Accumulator`s to `Processor`s.
+   This replaces the prior `Record` `struct` use for this purpose. (#835)
+- New dependabot integration to automate package upgrades. (#814)
+- `Meter` and `Tracer` implementations accept instrumentation version version as an optional argument.
+   This instrumentation version is passed on to exporters. (#811) (#805) (#802)
+- The OTLP exporter includes the instrumentation version in telemetry it exports. (#811)
+- Environment variables for Jaeger exporter are supported. (#796)
+- New `aggregation.Kind` in the export metric API. (#808)
+- New example that uses OTLP and the collector. (#790)
+- Handle errors in the span `SetName` during span initialization. (#791)
+- Default service config to enable retries for retry-able failed requests in the OTLP exporter and an option to override this default. (#777)
+- New `go.opentelemetry.io/otel/api/oterror` package to uniformly support error handling and definitions for the project. (#778)
+- New `global` default implementation of the `go.opentelemetry.io/otel/api/oterror.Handler` interface to be used to handle errors prior to an user defined `Handler`.
+   There is also functionality for the user to register their `Handler` as well as a convenience function `Handle` to handle an error with this global `Handler`(#778)
+- Options to specify propagators for httptrace and grpctrace instrumentation. (#784)
+- The required `application/json` header for the Zipkin exporter is included in all exports. (#774)
+- Integrate HTTP semantics helpers from the contrib repository into the `api/standard` package. #769
+
+### Changed
+
+- Rename `Integrator` to `Processor` in the metric SDK. (#863)
+- Rename `AggregationSelector` to `AggregatorSelector`. (#859)
+- Rename `SynchronizedCopy` to `SynchronizedMove`. (#858)
+- Rename `simple` integrator to `basic` integrator. (#857)
+- Merge otlp collector examples. (#841)
+- Change the metric SDK to support cumulative, delta, and pass-through exporters directly.
+   With these changes, cumulative and delta specific exporters are able to request the correct kind of aggregation from the SDK. (#840)
+- The `Aggregator.Checkpoint` API is renamed to `SynchronizedCopy` and adds an argument, a different `Aggregator` into which the copy is stored. (#812)
+- The `export.Aggregator` contract is that `Update()` and `SynchronizedCopy()` are synchronized with each other.
+   All the aggregation interfaces (`Sum`, `LastValue`, ...) are not meant to be synchronized, as the caller is expected to synchronize aggregators at a higher level after the `Accumulator`.
+   Some of the `Aggregators` used unnecessary locking and that has been cleaned up. (#812)
+- Use of `metric.Number` was replaced by `int64` now that we use `sync.Mutex` in the `MinMaxSumCount` and `Histogram` `Aggregators`. (#812)
+- Replace `AlwaysParentSample` with `ParentSample(fallback)` to match the OpenTelemetry v0.5.0 specification. (#810)
+- Rename `sdk/export/metric/aggregator` to `sdk/export/metric/aggregation`. #808
+- Send configured headers with every request in the OTLP exporter, instead of just on connection creation. (#806)
+- Update error handling for any one off error handlers, replacing, instead, with the `global.Handle` function. (#791)
+- Rename `plugin` directory to `instrumentation` to match the OpenTelemetry specification. (#779)
+- Makes the argument order to Histogram and DDSketch `New()` consistent. (#781)
+
+### Removed
+
+- `Uint64NumberKind` and related functions from the API. (#864)
+- Context arguments from `Aggregator.Checkpoint` and `Integrator.Process` as they were unused. (#803)
+- `SpanID` is no longer included in parameters for sampling decision to match the OpenTelemetry specification. (#775)
+
+### Fixed
+
+- Upgrade OTLP exporter to opentelemetry-proto matching the opentelemetry-collector v0.4.0 release. (#866)
+- Allow changes to `go.sum` and `go.mod` when running dependabot tidy-up. (#871)
+- Bump github.com/stretchr/testify from 1.4.0 to 1.6.1. (#824)
+- Bump github.com/prometheus/client_golang from 1.7.0 to 1.7.1 in /exporters/metric/prometheus. (#867)
+- Bump google.golang.org/grpc from 1.29.1 to 1.30.0 in /exporters/trace/jaeger. (#853)
+- Bump google.golang.org/grpc from 1.29.1 to 1.30.0 in /exporters/trace/zipkin. (#854)
+- Bumps github.com/golang/protobuf from 1.3.2 to 1.4.2 (#848)
+- Bump github.com/stretchr/testify from 1.4.0 to 1.6.1 in /exporters/otlp (#817)
+- Bump github.com/golangci/golangci-lint from 1.25.1 to 1.27.0 in /tools (#828)
+- Bump github.com/prometheus/client_golang from 1.5.0 to 1.7.0 in /exporters/metric/prometheus (#838)
+- Bump github.com/stretchr/testify from 1.4.0 to 1.6.1 in /exporters/trace/jaeger (#829)
+- Bump github.com/benbjohnson/clock from 1.0.0 to 1.0.3 (#815)
+- Bump github.com/stretchr/testify from 1.4.0 to 1.6.1 in /exporters/trace/zipkin (#823)
+- Bump github.com/itchyny/gojq from 0.10.1 to 0.10.3 in /tools (#830)
+- Bump github.com/stretchr/testify from 1.4.0 to 1.6.1 in /exporters/metric/prometheus (#822)
+- Bump google.golang.org/grpc from 1.27.1 to 1.29.1 in /exporters/trace/zipkin (#820)
+- Bump google.golang.org/grpc from 1.27.1 to 1.29.1 in /exporters/trace/jaeger (#831)
+- Bump github.com/google/go-cmp from 0.4.0 to 0.5.0 (#836)
+- Bump github.com/google/go-cmp from 0.4.0 to 0.5.0 in /exporters/trace/jaeger (#837)
+- Bump github.com/google/go-cmp from 0.4.0 to 0.5.0 in /exporters/otlp (#839)
+- Bump google.golang.org/api from 0.20.0 to 0.28.0 in /exporters/trace/jaeger (#843)
+- Set span status from HTTP status code in the othttp instrumentation. (#832)
+- Fixed typo in push controller comment. (#834)
+- The `Aggregator` testing has been updated and cleaned. (#812)
+- `metric.Number(0)` expressions are replaced by `0` where possible. (#812)
+- Fixed `global` `handler_test.go` test failure. #804
+- Fixed `BatchSpanProcessor.Shutdown` to wait until all spans are processed. (#766)
+- Fixed OTLP example's accidental early close of exporter. (#807)
+- Ensure zipkin exporter reads and closes response body. (#788)
+- Update instrumentation to use `api/standard` keys instead of custom keys. (#782)
+- Clean up tools and RELEASING documentation. (#762)
+
+## [0.6.0] - 2020-05-21
+
+### Added
+
+- Support for `Resource`s in the prometheus exporter. (#757)
+- New pull controller. (#751)
+- New `UpDownSumObserver` instrument. (#750)
+- OpenTelemetry collector demo. (#711)
+- New `SumObserver` instrument. (#747)
+- New `UpDownCounter` instrument. (#745)
+- New timeout `Option` and configuration function `WithTimeout` to the push controller. (#742)
+- New `api/standards` package to implement semantic conventions and standard key-value generation. (#731)
+
+### Changed
+
+- Rename `Register*` functions in the metric API to `New*` for all `Observer` instruments. (#761)
+- Use `[]float64` for histogram boundaries, not `[]metric.Number`. (#758)
+- Change OTLP example to use exporter as a trace `Syncer` instead of as an unneeded `Batcher`. (#756)
+- Replace `WithResourceAttributes()` with `WithResource()` in the trace SDK. (#754)
+- The prometheus exporter now uses the new pull controller. (#751)
+- Rename `ScheduleDelayMillis` to `BatchTimeout` in the trace `BatchSpanProcessor`.(#752)
+- Support use of synchronous instruments in asynchronous callbacks (#725)
+- Move `Resource` from the `Export` method parameter into the metric export `Record`. (#739)
+- Rename `Observer` instrument to `ValueObserver`. (#734)
+- The push controller now has a method (`Provider()`) to return a `metric.Provider` instead of the old `Meter` method that acted as a `metric.Provider`. (#738)
+- Replace `Measure` instrument by `ValueRecorder` instrument. (#732)
+- Rename correlation context header from `"Correlation-Context"` to `"otcorrelations"` to match the OpenTelemetry specification. (#727)
+
+### Fixed
+
+- Ensure gRPC `ClientStream` override methods do not panic in grpctrace package. (#755)
+- Disable parts of `BatchSpanProcessor` test until a fix is found. (#743)
+- Fix `string` case in `kv` `Infer` function. (#746)
+- Fix panic in grpctrace client interceptors. (#740)
+- Refactor the `api/metrics` push controller and add `CheckpointSet` synchronization. (#737)
+- Rewrite span batch process queue batching logic. (#719)
+- Remove the push controller named Meter map. (#738)
+- Fix Histogram aggregator initial state (fix #735). (#736)
+- Ensure golang alpine image is running `golang-1.14` for examples. (#733)
+- Added test for grpctrace `UnaryInterceptorClient`. (#695)
+- Rearrange `api/metric` code layout. (#724)
+
+## [0.5.0] - 2020-05-13
+
+### Added
+
+- Batch `Observer` callback support. (#717)
+- Alias `api` types to root package of project. (#696)
+- Create basic `othttp.Transport` for simple client instrumentation. (#678)
+- `SetAttribute(string, interface{})` to the trace API. (#674)
+- Jaeger exporter option that allows user to specify custom http client. (#671)
+- `Stringer` and `Infer` methods to `key`s. (#662)
+
+### Changed
+
+- Rename `NewKey` in the `kv` package to just `Key`. (#721)
+- Move `core` and `key` to `kv` package. (#720)
+- Make the metric API `Meter` a `struct` so the abstract `MeterImpl` can be passed and simplify implementation. (#709)
+- Rename SDK `Batcher` to `Integrator` to match draft OpenTelemetry SDK specification. (#710)
+- Rename SDK `Ungrouped` integrator to `simple.Integrator` to match draft OpenTelemetry SDK specification. (#710)
+- Rename SDK `SDK` `struct` to `Accumulator` to match draft OpenTelemetry SDK specification. (#710)
+- Move `Number` from `core` to `api/metric` package. (#706)
+- Move `SpanContext` from `core` to `trace` package. (#692)
+- Change traceparent header from `Traceparent` to `traceparent` to implement the W3C specification. (#681)
+
+### Fixed
+
+- Update tooling to run generators in all submodules. (#705)
+- gRPC interceptor regexp to match methods without a service name. (#683)
+- Use a `const` for padding 64-bit B3 trace IDs. (#701)
+- Update `mockZipkin` listen address from `:0` to `127.0.0.1:0`. (#700)
+- Left-pad 64-bit B3 trace IDs with zero. (#698)
+- Propagate at least the first W3C tracestate header. (#694)
+- Remove internal `StateLocker` implementation. (#688)
+- Increase instance size CI system uses. (#690)
+- Add a `key` benchmark and use reflection in `key.Infer()`. (#679)
+- Fix internal `global` test by using `global.Meter` with `RecordBatch()`. (#680)
+- Reimplement histogram using mutex instead of `StateLocker`. (#669)
+- Switch `MinMaxSumCount` to a mutex lock implementation instead of `StateLocker`. (#667)
+- Update documentation to not include any references to `WithKeys`. (#672)
+- Correct misspelling. (#668)
+- Fix clobbering of the span context if extraction fails. (#656)
+- Bump `golangci-lint` and work around the corrupting bug. (#666) (#670)
+
+## [0.4.3] - 2020-04-24
+
+### Added
+
+- `Dockerfile` and `docker-compose.yml` to run example code. (#635)
+- New `grpctrace` package that provides gRPC client and server interceptors for both unary and stream connections. (#621)
+- New `api/label` package, providing common label set implementation. (#651)
+- Support for JSON marshaling of `Resources`. (#654)
+- `TraceID` and `SpanID` implementations for `Stringer` interface. (#642)
+- `RemoteAddrKey` in the othttp plugin to include the HTTP client address in top-level spans. (#627)
+- `WithSpanFormatter` option to the othttp plugin. (#617)
+- Updated README to include section for compatible libraries and include reference to the contrib repository. (#612)
+- The prometheus exporter now supports exporting histograms. (#601)
+- A `String` method to the `Resource` to return a hashable identifier for a now unique resource. (#613)
+- An `Iter` method to the `Resource` to return an array `AttributeIterator`. (#613)
+- An `Equal` method to the `Resource` test the equivalence of resources. (#613)
+- An iterable structure (`AttributeIterator`) for `Resource` attributes.
+
+### Changed
+
+- zipkin export's `NewExporter` now requires a `serviceName` argument to ensure this needed values is provided. (#644)
+- Pass `Resources` through the metrics export pipeline. (#659)
+
+### Removed
+
+- `WithKeys` option from the metric API. (#639)
+
+### Fixed
+
+- Use the `label.Set.Equivalent` value instead of an encoding in the batcher. (#658)
+- Correct typo `trace.Exporter` to `trace.SpanSyncer` in comments. (#653)
+- Use type names for return values in jaeger exporter. (#648)
+- Increase the visibility of the `api/key` package by updating comments and fixing usages locally. (#650)
+- `Checkpoint` only after `Update`; Keep records in the `sync.Map` longer. (#647)
+- Do not cache `reflect.ValueOf()` in metric Labels. (#649)
+- Batch metrics exported from the OTLP exporter based on `Resource` and labels. (#626)
+- Add error wrapping to the prometheus exporter. (#631)
+- Update the OTLP exporter batching of traces to use a unique `string` representation of an associated `Resource` as the batching key. (#623)
+- Update OTLP `SpanData` transform to only include the `ParentSpanID` if one exists. (#614)
+- Update `Resource` internal representation to uniquely and reliably identify resources. (#613)
+- Check return value from `CheckpointSet.ForEach` in prometheus exporter. (#622)
+- Ensure spans created by httptrace client tracer reflect operation structure. (#618)
+- Create a new recorder rather than reuse when multiple observations in same epoch for asynchronous instruments. #610
+- The default port the OTLP exporter uses to connect to the OpenTelemetry collector is updated to match the one the collector listens on by default. (#611)
+
+## [0.4.2] - 2020-03-31
+
+### Fixed
+
+- Fix `pre_release.sh` to update version in `sdk/opentelemetry.go`. (#607)
+- Fix time conversion from internal to OTLP in OTLP exporter. (#606)
+
+## [0.4.1] - 2020-03-31
+
+### Fixed
+
+- Update `tag.sh` to create signed tags. (#604)
+
+## [0.4.0] - 2020-03-30
+
+### Added
+
+- New API package `api/metric/registry` that exposes a `MeterImpl` wrapper for use by SDKs to generate unique instruments. (#580)
+- Script to verify examples after a new release. (#579)
+
+### Removed
+
+- The dogstatsd exporter due to lack of support.
+   This additionally removes support for statsd. (#591)
+- `LabelSet` from the metric API.
+   This is replaced by a `[]core.KeyValue` slice. (#595)
+- `Labels` from the metric API's `Meter` interface. (#595)
+
+### Changed
+
+- The metric `export.Labels` became an interface which the SDK implements and the `export` package provides a simple, immutable implementation of this interface intended for testing purposes. (#574)
+- Renamed `internal/metric.Meter` to `MeterImpl`. (#580)
+- Renamed `api/global/internal.obsImpl` to `asyncImpl`. (#580)
+
+### Fixed
+
+- Corrected missing return in mock span. (#582)
+- Update License header for all source files to match CNCF guidelines and include a test to ensure it is present. (#586) (#596)
+- Update to v0.3.0 of the OTLP in the OTLP exporter. (#588)
+- Update pre-release script to be compatible between GNU and BSD based systems. (#592)
+- Add a `RecordBatch` benchmark. (#594)
+- Moved span transforms of the OTLP exporter to the internal package. (#593)
+- Build both go-1.13 and go-1.14 in circleci to test for all supported versions of Go. (#569)
+- Removed unneeded allocation on empty labels in OLTP exporter. (#597)
+- Update `BatchedSpanProcessor` to process the queue until no data but respect max batch size. (#599)
+- Update project documentation godoc.org links to pkg.go.dev. (#602)
+
+## [0.3.0] - 2020-03-21
+
+This is a first official beta release, which provides almost fully complete metrics, tracing, and context propagation functionality.
+There is still a possibility of breaking changes.
+
+### Added
+
+- Add `Observer` metric instrument. (#474)
+- Add global `Propagators` functionality to enable deferred initialization for propagators registered before the first Meter SDK is installed. (#494)
+- Simplified export setup pipeline for the jaeger exporter to match other exporters. (#459)
+- The zipkin trace exporter. (#495)
+- The OTLP exporter to export metric and trace telemetry to the OpenTelemetry collector. (#497) (#544) (#545)
+- Add `StatusMessage` field to the trace `Span`. (#524)
+- Context propagation in OpenTracing bridge in terms of OpenTelemetry context propagation. (#525)
+- The `Resource` type was added to the SDK. (#528)
+- The global API now supports a `Tracer` and `Meter` function as shortcuts to getting a global `*Provider` and calling these methods directly. (#538)
+- The metric API now defines a generic `MeterImpl` interface to support general purpose `Meter` construction.
+   Additionally, `SyncImpl` and `AsyncImpl` are added to support general purpose instrument construction. (#560)
+- A metric `Kind` is added to represent the `MeasureKind`, `ObserverKind`, and `CounterKind`. (#560)
+- Scripts to better automate the release process. (#576)
+
+### Changed
+
+- Default to to use `AlwaysSampler` instead of `ProbabilitySampler` to match OpenTelemetry specification. (#506)
+- Renamed `AlwaysSampleSampler` to `AlwaysOnSampler` in the trace API. (#511)
+- Renamed `NeverSampleSampler` to `AlwaysOffSampler` in the trace API. (#511)
+- The `Status` field of the `Span` was changed to `StatusCode` to disambiguate with the added `StatusMessage`. (#524)
+- Updated the trace `Sampler` interface conform to the OpenTelemetry specification. (#531)
+- Rename metric API `Options` to `Config`. (#541)
+- Rename metric `Counter` aggregator to be `Sum`. (#541)
+- Unify metric options into `Option` from instrument specific options. (#541)
+- The trace API's `TraceProvider` now support `Resource`s. (#545)
+- Correct error in zipkin module name. (#548)
+- The jaeger trace exporter now supports `Resource`s. (#551)
+- Metric SDK now supports `Resource`s.
+   The `WithResource` option was added to configure a `Resource` on creation and the `Resource` method was added to the metric `Descriptor` to return the associated `Resource`. (#552)
+- Replace `ErrNoLastValue` and `ErrEmptyDataSet` by `ErrNoData` in the metric SDK. (#557)
+- The stdout trace exporter now supports `Resource`s. (#558)
+- The metric `Descriptor` is now included at the API instead of the SDK. (#560)
+- Replace `Ordered` with an iterator in `export.Labels`. (#567)
+
+### Removed
+
+- The vendor specific Stackdriver. It is now hosted on 3rd party vendor infrastructure. (#452)
+- The `Unregister` method for metric observers as it is not in the OpenTelemetry specification. (#560)
+- `GetDescriptor` from the metric SDK. (#575)
+- The `Gauge` instrument from the metric API. (#537)
+
+### Fixed
+
+- Make histogram aggregator checkpoint consistent. (#438)
+- Update README with import instructions and how to build and test. (#505)
+- The default label encoding was updated to be unique. (#508)
+- Use `NewRoot` in the othttp plugin for public endpoints. (#513)
+- Fix data race in `BatchedSpanProcessor`. (#518)
+- Skip test-386 for Mac OS 10.15.x (Catalina and upwards). #521
+- Use a variable-size array to represent ordered labels in maps. (#523)
+- Update the OTLP protobuf and update changed import path. (#532)
+- Use `StateLocker` implementation in `MinMaxSumCount`. (#546)
+- Eliminate goroutine leak in histogram stress test. (#547)
+- Update OTLP exporter with latest protobuf. (#550)
+- Add filters to the othttp plugin. (#556)
+- Provide an implementation of the `Header*` filters that do not depend on Go 1.14. (#565)
+- Encode labels once during checkpoint.
+   The checkpoint function is executed in a single thread so we can do the encoding lazily before passing the encoded version of labels to the exporter.
+   This is a cheap and quick way to avoid encoding the labels on every collection interval. (#572)
+- Run coverage over all packages in `COVERAGE_MOD_DIR`. (#573)
+
+## [0.2.3] - 2020-03-04
+
+### Added
+
+- `RecordError` method on `Span`s in the trace API to Simplify adding error events to spans. (#473)
+- Configurable push frequency for exporters setup pipeline. (#504)
+
+### Changed
+
+- Rename the `exporter` directory to `exporters`.
+   The `go.opentelemetry.io/otel/exporter/trace/jaeger` package was mistakenly released with a `v1.0.0` tag instead of `v0.1.0`.
+   This resulted in all subsequent releases not becoming the default latest.
+   A consequence of this was that all `go get`s pulled in the incompatible `v0.1.0` release of that package when pulling in more recent packages from other otel packages.
+   Renaming the `exporter` directory to `exporters` fixes this issue by renaming the package and therefore clearing any existing dependency tags.
+   Consequentially, this action also renames *all* exporter packages. (#502)
+
+### Removed
+
+- The `CorrelationContextHeader` constant in the `correlation` package is no longer exported. (#503)
+
+## [0.2.2] - 2020-02-27
+
+### Added
+
+- `HTTPSupplier` interface in the propagation API to specify methods to retrieve and store a single value for a key to be associated with a carrier. (#467)
+- `HTTPExtractor` interface in the propagation API to extract information from an `HTTPSupplier` into a context. (#467)
+- `HTTPInjector` interface in the propagation API to inject information into an `HTTPSupplier.` (#467)
+- `Config` and configuring `Option` to the propagator API. (#467)
+- `Propagators` interface in the propagation API to contain the set of injectors and extractors for all supported carrier formats. (#467)
+- `HTTPPropagator` interface in the propagation API to inject and extract from an `HTTPSupplier.` (#467)
+- `WithInjectors` and `WithExtractors` functions to the propagator API to configure injectors and extractors to use. (#467)
+- `ExtractHTTP` and `InjectHTTP` functions to apply configured HTTP extractors and injectors to a passed context. (#467)
+- Histogram aggregator. (#433)
+- `DefaultPropagator` function and have it return `trace.TraceContext` as the default context propagator. (#456)
+- `AlwaysParentSample` sampler to the trace API. (#455)
+- `WithNewRoot` option function to the trace API to specify the created span should be considered a root span. (#451)
+
+### Changed
+
+- Renamed `WithMap` to `ContextWithMap` in the correlation package. (#481)
+- Renamed `FromContext` to `MapFromContext` in the correlation package. (#481)
+- Move correlation context propagation to correlation package. (#479)
+- Do not default to putting remote span context into links. (#480)
+- `Tracer.WithSpan` updated to accept `StartOptions`. (#472)
+- Renamed `MetricKind` to `Kind` to not stutter in the type usage. (#432)
+- Renamed the `export` package to `metric` to match directory structure. (#432)
+- Rename the `api/distributedcontext` package to `api/correlation`. (#444)
+- Rename the `api/propagators` package to `api/propagation`. (#444)
+- Move the propagators from the `propagators` package into the `trace` API package. (#444)
+- Update `Float64Gauge`, `Int64Gauge`, `Float64Counter`, `Int64Counter`, `Float64Measure`, and `Int64Measure` metric methods to use value receivers instead of pointers. (#462)
+- Moved all dependencies of tools package to a tools directory. (#466)
+
+### Removed
+
+- Binary propagators. (#467)
+- NOOP propagator. (#467)
+
+### Fixed
+
+- Upgraded `github.com/golangci/golangci-lint` from `v1.21.0` to `v1.23.6` in `tools/`. (#492)
+- Fix a possible nil-dereference crash (#478)
+- Correct comments for `InstallNewPipeline` in the stdout exporter. (#483)
+- Correct comments for `InstallNewPipeline` in the dogstatsd exporter. (#484)
+- Correct comments for `InstallNewPipeline` in the prometheus exporter. (#482)
+- Initialize `onError` based on `Config` in prometheus exporter. (#486)
+- Correct module name in prometheus exporter README. (#475)
+- Removed tracer name prefix from span names. (#430)
+- Fix `aggregator_test.go` import package comment. (#431)
+- Improved detail in stdout exporter. (#436)
+- Fix a dependency issue (generate target should depend on stringer, not lint target) in Makefile. (#442)
+- Reorders the Makefile targets within `precommit` target so we generate files and build the code before doing linting, so we can get much nicer errors about syntax errors from the compiler. (#442)
+- Reword function documentation in gRPC plugin. (#446)
+- Send the `span.kind` tag to Jaeger from the jaeger exporter. (#441)
+- Fix `metadataSupplier` in the jaeger exporter to overwrite the header if existing instead of appending to it. (#441)
+- Upgraded to Go 1.13 in CI. (#465)
+- Correct opentelemetry.io URL in trace SDK documentation. (#464)
+- Refactored reference counting logic in SDK determination of stale records. (#468)
+- Add call to `runtime.Gosched` in instrument `acquireHandle` logic to not block the collector. (#469)
+
+## [0.2.1.1] - 2020-01-13
+
+### Fixed
+
+- Use stateful batcher on Prometheus exporter fixing regresion introduced in #395. (#428)
+
+## [0.2.1] - 2020-01-08
+
+### Added
+
+- Global meter forwarding implementation.
+   This enables deferred initialization for metric instruments registered before the first Meter SDK is installed. (#392)
+- Global trace forwarding implementation.
+   This enables deferred initialization for tracers registered before the first Trace SDK is installed. (#406)
+- Standardize export pipeline creation in all exporters. (#395)
+- A testing, organization, and comments for 64-bit field alignment. (#418)
+- Script to tag all modules in the project. (#414)
+
+### Changed
+
+- Renamed `propagation` package to `propagators`. (#362)
+- Renamed `B3Propagator` propagator to `B3`. (#362)
+- Renamed `TextFormatPropagator` propagator to `TextFormat`. (#362)
+- Renamed `BinaryPropagator` propagator to `Binary`. (#362)
+- Renamed `BinaryFormatPropagator` propagator to `BinaryFormat`. (#362)
+- Renamed `NoopTextFormatPropagator` propagator to `NoopTextFormat`. (#362)
+- Renamed `TraceContextPropagator` propagator to `TraceContext`. (#362)
+- Renamed `SpanOption` to `StartOption` in the trace API. (#369)
+- Renamed `StartOptions` to `StartConfig` in the trace API. (#369)
+- Renamed `EndOptions` to `EndConfig` in the trace API. (#369)
+- `Number` now has a pointer receiver for its methods. (#375)
+- Renamed `CurrentSpan` to `SpanFromContext` in the trace API. (#379)
+- Renamed `SetCurrentSpan` to `ContextWithSpan` in the trace API. (#379)
+- Renamed `Message` in Event to `Name` in the trace API. (#389)
+- Prometheus exporter no longer aggregates metrics, instead it only exports them. (#385)
+- Renamed `HandleImpl` to `BoundInstrumentImpl` in the metric API. (#400)
+- Renamed `Float64CounterHandle` to `Float64CounterBoundInstrument` in the metric API. (#400)
+- Renamed `Int64CounterHandle` to `Int64CounterBoundInstrument` in the metric API. (#400)
+- Renamed `Float64GaugeHandle` to `Float64GaugeBoundInstrument` in the metric API. (#400)
+- Renamed `Int64GaugeHandle` to `Int64GaugeBoundInstrument` in the metric API. (#400)
+- Renamed `Float64MeasureHandle` to `Float64MeasureBoundInstrument` in the metric API. (#400)
+- Renamed `Int64MeasureHandle` to `Int64MeasureBoundInstrument` in the metric API. (#400)
+- Renamed `Release` method for bound instruments in the metric API to `Unbind`. (#400)
+- Renamed `AcquireHandle` method for bound instruments in the metric API to `Bind`. (#400)
+- Renamed the `File` option in the stdout exporter to `Writer`. (#404)
+- Renamed all `Options` to `Config` for all metric exports where this wasn't already the case.
+
+### Fixed
+
+- Aggregator import path corrected. (#421)
+- Correct links in README. (#368)
+- The README was updated to match latest code changes in its examples. (#374)
+- Don't capitalize error statements. (#375)
+- Fix ignored errors. (#375)
+- Fix ambiguous variable naming. (#375)
+- Removed unnecessary type casting. (#375)
+- Use named parameters. (#375)
+- Updated release schedule. (#378)
+- Correct http-stackdriver example module name. (#394)
+- Removed the `http.request` span in `httptrace` package. (#397)
+- Add comments in the metrics SDK (#399)
+- Initialize checkpoint when creating ddsketch aggregator to prevent panic when merging into a empty one. (#402) (#403)
+- Add documentation of compatible exporters in the README. (#405)
+- Typo fix. (#408)
+- Simplify span check logic in SDK tracer implementation. (#419)
+
+## [0.2.0] - 2019-12-03
+
+### Added
+
+- Unary gRPC tracing example. (#351)
+- Prometheus exporter. (#334)
+- Dogstatsd metrics exporter. (#326)
+
+### Changed
+
+- Rename `MaxSumCount` aggregation to `MinMaxSumCount` and add the `Min` interface for this aggregation. (#352)
+- Rename `GetMeter` to `Meter`. (#357)
+- Rename `HTTPTraceContextPropagator` to `TraceContextPropagator`. (#355)
+- Rename `HTTPB3Propagator` to `B3Propagator`. (#355)
+- Rename `HTTPTraceContextPropagator` to `TraceContextPropagator`. (#355)
+- Move `/global` package to `/api/global`. (#356)
+- Rename `GetTracer` to `Tracer`. (#347)
+
+### Removed
+
+- `SetAttribute` from the `Span` interface in the trace API. (#361)
+- `AddLink` from the `Span` interface in the trace API. (#349)
+- `Link` from the `Span` interface in the trace API. (#349)
+
+### Fixed
+
+- Exclude example directories from coverage report. (#365)
+- Lint make target now implements automatic fixes with `golangci-lint` before a second run to report the remaining issues. (#360)
+- Drop `GO111MODULE` environment variable in Makefile as Go 1.13 is the project specified minimum version and this is environment variable is not needed for that version of Go. (#359)
+- Run the race checker for all test. (#354)
+- Redundant commands in the Makefile are removed. (#354)
+- Split the `generate` and `lint` targets of the Makefile. (#354)
+- Renames `circle-ci` target to more generic `ci` in Makefile. (#354)
+- Add example Prometheus binary to gitignore. (#358)
+- Support negative numbers with the `MaxSumCount`. (#335)
+- Resolve race conditions in `push_test.go` identified in #339. (#340)
+- Use `/usr/bin/env bash` as a shebang in scripts rather than `/bin/bash`. (#336)
+- Trace benchmark now tests both `AlwaysSample` and `NeverSample`.
+   Previously it was testing `AlwaysSample` twice. (#325)
+- Trace benchmark now uses a `[]byte` for `TraceID` to fix failing test. (#325)
+- Added a trace benchmark to test variadic functions in `setAttribute` vs `setAttributes` (#325)
+- The `defaultkeys` batcher was only using the encoded label set as its map key while building a checkpoint.
+   This allowed distinct label sets through, but any metrics sharing a label set could be overwritten or merged incorrectly.
+   This was corrected. (#333)
+
+## [0.1.2] - 2019-11-18
+
+### Fixed
+
+- Optimized the `simplelru` map for attributes to reduce the number of allocations. (#328)
+- Removed unnecessary unslicing of parameters that are already a slice. (#324)
+
+## [0.1.1] - 2019-11-18
+
+This release contains a Metrics SDK with stdout exporter and supports basic aggregations such as counter, gauges, array, maxsumcount, and ddsketch.
+
+### Added
+
+- Metrics stdout export pipeline. (#265)
+- Array aggregation for raw measure metrics. (#282)
+- The core.Value now have a `MarshalJSON` method. (#281)
+
+### Removed
+
+- `WithService`, `WithResources`, and `WithComponent` methods of tracers. (#314)
+- Prefix slash in `Tracer.Start()` for the Jaeger example. (#292)
+
+### Changed
+
+- Allocation in LabelSet construction to reduce GC overhead. (#318)
+- `trace.WithAttributes` to append values instead of replacing (#315)
+- Use a formula for tolerance in sampling tests. (#298)
+- Move export types into trace and metric-specific sub-directories. (#289)
+- `SpanKind` back to being based on an `int` type. (#288)
+
+### Fixed
+
+- URL to OpenTelemetry website in README. (#323)
+- Name of othttp default tracer. (#321)
+- `ExportSpans` for the stackdriver exporter now handles `nil` context. (#294)
+- CI modules cache to correctly restore/save from/to the cache. (#316)
+- Fix metric SDK race condition between `LoadOrStore` and the assignment `rec.recorder = i.meter.exporter.AggregatorFor(rec)`. (#293)
+- README now reflects the new code structure introduced with these changes. (#291)
+- Make the basic example work. (#279)
+
+## [0.1.0] - 2019-11-04
+
+This is the first release of open-telemetry go library.
+It contains api and sdk for trace and meter.
+
+### Added
+
+- Initial OpenTelemetry trace and metric API prototypes.
+- Initial OpenTelemetry trace, metric, and export SDK packages.
+- A wireframe bridge to support compatibility with OpenTracing.
+- Example code for a basic, http-stackdriver, http, jaeger, and named tracer setup.
+- Exporters for Jaeger, Stackdriver, and stdout.
+- Propagators for binary, B3, and trace-context protocols.
+- Project information and guidelines in the form of a README and CONTRIBUTING.
+- Tools to build the project and a Makefile to automate the process.
+- Apache-2.0 license.
+- CircleCI build CI manifest files.
+- CODEOWNERS file to track owners of this project.
+
+[Unreleased]: https://github.com/open-telemetry/opentelemetry-go/compare/v1.0.0-RC1...HEAD
+[1.0.0-RC1]: https://github.com/open-telemetry/opentelemetry-go/releases/tag/v1.0.0-RC1
+[0.20.0]: https://github.com/open-telemetry/opentelemetry-go/releases/tag/v0.20.0
+[0.19.0]: https://github.com/open-telemetry/opentelemetry-go/releases/tag/v0.19.0
+[0.18.0]: https://github.com/open-telemetry/opentelemetry-go/releases/tag/v0.18.0
+[0.17.0]: https://github.com/open-telemetry/opentelemetry-go/releases/tag/v0.17.0
+[0.16.0]: https://github.com/open-telemetry/opentelemetry-go/releases/tag/v0.16.0
+[0.15.0]: https://github.com/open-telemetry/opentelemetry-go/releases/tag/v0.15.0
+[0.14.0]: https://github.com/open-telemetry/opentelemetry-go/releases/tag/v0.14.0
+[0.13.0]: https://github.com/open-telemetry/opentelemetry-go/releases/tag/v0.13.0
+[0.12.0]: https://github.com/open-telemetry/opentelemetry-go/releases/tag/v0.12.0
+[0.11.0]: https://github.com/open-telemetry/opentelemetry-go/releases/tag/v0.11.0
+[0.10.0]: https://github.com/open-telemetry/opentelemetry-go/releases/tag/v0.10.0
+[0.9.0]: https://github.com/open-telemetry/opentelemetry-go/releases/tag/v0.9.0
+[0.8.0]: https://github.com/open-telemetry/opentelemetry-go/releases/tag/v0.8.0
+[0.7.0]: https://github.com/open-telemetry/opentelemetry-go/releases/tag/v0.7.0
+[0.6.0]: https://github.com/open-telemetry/opentelemetry-go/releases/tag/v0.6.0
+[0.5.0]: https://github.com/open-telemetry/opentelemetry-go/releases/tag/v0.5.0
+[0.4.3]: https://github.com/open-telemetry/opentelemetry-go/releases/tag/v0.4.3
+[0.4.2]: https://github.com/open-telemetry/opentelemetry-go/releases/tag/v0.4.2
+[0.4.1]: https://github.com/open-telemetry/opentelemetry-go/releases/tag/v0.4.1
+[0.4.0]: https://github.com/open-telemetry/opentelemetry-go/releases/tag/v0.4.0
+[0.3.0]: https://github.com/open-telemetry/opentelemetry-go/releases/tag/v0.3.0
+[0.2.3]: https://github.com/open-telemetry/opentelemetry-go/releases/tag/v0.2.3
+[0.2.2]: https://github.com/open-telemetry/opentelemetry-go/releases/tag/v0.2.2
+[0.2.1.1]: https://github.com/open-telemetry/opentelemetry-go/releases/tag/v0.2.1.1
+[0.2.1]: https://github.com/open-telemetry/opentelemetry-go/releases/tag/v0.2.1
+[0.2.0]: https://github.com/open-telemetry/opentelemetry-go/releases/tag/v0.2.0
+[0.1.2]: https://github.com/open-telemetry/opentelemetry-go/releases/tag/v0.1.2
+[0.1.1]: https://github.com/open-telemetry/opentelemetry-go/releases/tag/v0.1.1
+[0.1.0]: https://github.com/open-telemetry/opentelemetry-go/releases/tag/v0.1.0
diff --git a/vendor/go.opentelemetry.io/otel/CODEOWNERS b/vendor/go.opentelemetry.io/otel/CODEOWNERS
new file mode 100644
index 000000000..0fa3b2c4a
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/CODEOWNERS
@@ -0,0 +1,17 @@
+#####################################################
+#
+# List of approvers for this repository
+#
+#####################################################
+#
+# Learn about membership in OpenTelemetry community:
+#  https://github.com/open-telemetry/community/blob/main/community-membership.md
+#
+#
+# Learn about CODEOWNERS file format:
+#  https://help.github.com/en/articles/about-code-owners
+#
+
+* @jmacd @MrAlias @Aneurysm9 @evantorrie @XSAM @dashpole @paivagustavo @MadVikingGod
+
+CODEOWNERS @MrAlias @Aneurysm9
diff --git a/vendor/go.opentelemetry.io/otel/CONTRIBUTING.md b/vendor/go.opentelemetry.io/otel/CONTRIBUTING.md
new file mode 100644
index 000000000..d631339a5
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/CONTRIBUTING.md
@@ -0,0 +1,473 @@
+# Contributing to opentelemetry-go
+
+The Go special interest group (SIG) meets regularly. See the
+OpenTelemetry
+[community](https://github.com/open-telemetry/community#golang-sdk)
+repo for information on this and other language SIGs.
+
+See the [public meeting
+notes](https://docs.google.com/document/d/1A63zSWX0x2CyCK_LoNhmQC4rqhLpYXJzXbEPDUQ2n6w/edit#heading=h.9tngw7jdwd6b)
+for a summary description of past meetings. To request edit access,
+join the meeting or get in touch on
+[Slack](https://cloud-native.slack.com/archives/C01NPAXACKT).
+
+## Development
+
+You can view and edit the source code by cloning this repository:
+
+```sh
+git clone https://github.com/open-telemetry/opentelemetry-go.git
+```
+
+Run `make test` to run the tests instead of `go test`.
+
+There are some generated files checked into the repo. To make sure
+that the generated files are up-to-date, run `make` (or `make
+precommit` - the `precommit` target is the default).
+
+The `precommit` target also fixes the formatting of the code and
+checks the status of the go module files.
+
+If after running `make precommit` the output of `git status` contains
+`nothing to commit, working tree clean` then it means that everything
+is up-to-date and properly formatted.
+
+## Pull Requests
+
+### How to Send Pull Requests
+
+Everyone is welcome to contribute code to `opentelemetry-go` via
+GitHub pull requests (PRs).
+
+To create a new PR, fork the project in GitHub and clone the upstream
+repo:
+
+```sh
+go get -d go.opentelemetry.io/otel
+```
+
+(This may print some warning about "build constraints exclude all Go
+files", just ignore it.)
+
+This will put the project in `${GOPATH}/src/go.opentelemetry.io/otel`. You
+can alternatively use `git` directly with:
+
+```sh
+git clone https://github.com/open-telemetry/opentelemetry-go
+```
+
+(Note that `git clone` is *not* using the `go.opentelemetry.io/otel` name -
+that name is a kind of a redirector to GitHub that `go get` can
+understand, but `git` does not.)
+
+This would put the project in the `opentelemetry-go` directory in
+current working directory.
+
+Enter the newly created directory and add your fork as a new remote:
+
+```sh
+git remote add <YOUR_FORK> git@github.com:<YOUR_GITHUB_USERNAME>/opentelemetry-go
+```
+
+Check out a new branch, make modifications, run linters and tests, update
+`CHANGELOG.md`, and push the branch to your fork:
+
+```sh
+git checkout -b <YOUR_BRANCH_NAME>
+# edit files
+# update changelog
+make precommit
+git add -p
+git commit
+git push <YOUR_FORK> <YOUR_BRANCH_NAME>
+```
+
+Open a pull request against the main `opentelemetry-go` repo. Be sure to add the pull
+request ID to the entry you added to `CHANGELOG.md`.
+
+### How to Receive Comments
+
+* If the PR is not ready for review, please put `[WIP]` in the title,
+  tag it as `work-in-progress`, or mark it as
+  [`draft`](https://github.blog/2019-02-14-introducing-draft-pull-requests/).
+* Make sure CLA is signed and CI is clear.
+
+### How to Get PRs Merged
+
+A PR is considered to be **ready to merge** when:
+
+* It has received two approvals from Collaborators/Maintainers (at
+  different companies). This is not enforced through technical means
+  and a PR may be **ready to merge** with a single approval if the change
+  and its approach have been discussed and consensus reached.
+* Feedback has been addressed.
+* Any substantive changes to your PR will require that you clear any prior
+  Approval reviews, this includes changes resulting from other feedback. Unless
+  the approver explicitly stated that their approval will persist across
+  changes it should be assumed that the PR needs their review again. Other
+  project members (e.g. approvers, maintainers) can help with this if there are
+  any questions or if you forget to clear reviews.
+* It has been open for review for at least one working day. This gives
+  people reasonable time to review.
+* Trivial changes (typo, cosmetic, doc, etc.) do not have to wait for
+  one day and may be merged with a single Maintainer's approval.
+* `CHANGELOG.md` has been updated to reflect what has been
+  added, changed, removed, or fixed.
+* Urgent fix can take exception as long as it has been actively
+  communicated.
+
+Any Maintainer can merge the PR once it is **ready to merge**.
+
+## Design Choices
+
+As with other OpenTelemetry clients, opentelemetry-go follows the
+[opentelemetry-specification](https://github.com/open-telemetry/opentelemetry-specification).
+
+It's especially valuable to read through the [library
+guidelines](https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/library-guidelines.md).
+
+### Focus on Capabilities, Not Structure Compliance
+
+OpenTelemetry is an evolving specification, one where the desires and
+use cases are clear, but the method to satisfy those uses cases are
+not.
+
+As such, Contributions should provide functionality and behavior that
+conforms to the specification, but the interface and structure is
+flexible.
+
+It is preferable to have contributions follow the idioms of the
+language rather than conform to specific API names or argument
+patterns in the spec.
+
+For a deeper discussion, see
+[this](https://github.com/open-telemetry/opentelemetry-specification/issues/165).
+
+## Style Guide
+
+One of the primary goals of this project is that it is actually used by
+developers. With this goal in mind the project strives to build
+user-friendly and idiomatic Go code adhering to the Go community's best
+practices.
+
+For a non-comprehensive but foundational overview of these best practices
+the [Effective Go](https://golang.org/doc/effective_go.html) documentation
+is an excellent starting place.
+
+As a convenience for developers building this project the `make precommit`
+will format, lint, validate, and in some cases fix the changes you plan to
+submit. This check will need to pass for your changes to be able to be
+merged.
+
+In addition to idiomatic Go, the project has adopted certain standards for
+implementations of common patterns. These standards should be followed as a
+default, and if they are not followed documentation needs to be included as
+to the reasons why.
+
+### Configuration
+
+When creating an instantiation function for a complex `type T struct`, it is
+useful to allow variable number of options to be applied. However, the strong
+type system of Go restricts the function design options. There are a few ways
+to solve this problem, but we have landed on the following design.
+
+#### `config`
+
+Configuration should be held in a `struct` named `config`, or prefixed with
+specific type name this Configuration applies to if there are multiple
+`config` in the package. This type must contain configuration options.
+
+```go
+// config contains configuration options for a thing.
+type config struct {
+	// options ...
+}
+```
+
+In general the `config` type will not need to be used externally to the
+package and should be unexported. If, however, it is expected that the user
+will likely want to build custom options for the configuration, the `config`
+should be exported. Please, include in the documentation for the `config`
+how the user can extend the configuration.
+
+It is important that internal `config` are not shared across package boundaries.
+Meaning a `config` from one package should not be directly used by another. The
+one exception is the API packages.  The configs from the base API, eg.
+`go.opentelemetry.io/otel/trace.TracerConfig` and
+`go.opentelemetry.io/otel/metric.InstrumentConfig`, are intended to be consumed
+by the SDK therefor it is expected that these are exported.
+
+When a config is exported we want to maintain forward and backward
+compatibility, to achieve this no fields should be exported but should
+instead be accessed by methods.
+
+Optionally, it is common to include a `newConfig` function (with the same
+naming scheme). This function wraps any defaults setting and looping over
+all options to create a configured `config`.
+
+```go
+// newConfig returns an appropriately configured config.
+func newConfig([]Option) config {
+	// Set default values for config.
+	config := config{/* […] */}
+	for _, option := range options {
+		option.apply(&config)
+	}
+	// Preform any validation here.
+	return config
+}
+```
+
+If validation of the `config` options is also preformed this can return an
+error as well that is expected to be handled by the instantiation function
+or propagated to the user.
+
+Given the design goal of not having the user need to work with the `config`,
+the `newConfig` function should also be unexported.
+
+#### `Option`
+
+To set the value of the options a `config` contains, a corresponding
+`Option` interface type should be used.
+
+```go
+type Option interface {
+	apply(*config)
+}
+```
+
+Having `apply` unexported makes sure that it will not be used externally.
+Moreover, the interface becomes sealed so the user cannot easily implement
+the interface on its own.
+
+The name of the interface should be prefixed in the same way the
+corresponding `config` is (if at all).
+
+#### Options
+
+All user configurable options for a `config` must have a related unexported
+implementation of the `Option` interface and an exported configuration
+function that wraps this implementation.
+
+The wrapping function name should be prefixed with `With*` (or in the
+special case of a boolean options `Without*`) and should have the following
+function signature.
+
+```go
+func With*(…) Option { … }
+```
+
+##### `bool` Options
+
+```go
+type defaultFalseOption bool
+
+func (o defaultFalseOption) apply(c *config) {
+	c.Bool = bool(o)
+}
+
+// WithOption sets a T to have an option included.
+func WithOption() Option {
+	return defaultFalseOption(true)
+}
+```
+
+```go
+type defaultTrueOption bool
+
+func (o defaultTrueOption) apply(c *config) {
+	c.Bool = bool(o)
+}
+
+// WithoutOption sets a T to have Bool option excluded.
+func WithoutOption() Option {
+	return defaultTrueOption(false)
+}
+```
+
+##### Declared Type Options
+
+```go
+type myTypeOption struct {
+	MyType MyType
+}
+
+func (o myTypeOption) apply(c *config) {
+	c.MyType = o.MyType
+}
+
+// WithMyType sets T to have include MyType.
+func WithMyType(t MyType) Option {
+	return myTypeOption{t}
+}
+```
+
+##### Functional Options
+
+```go
+type optionFunc func(*config)
+
+func (fn optionFunc) apply(c *config) {
+	fn(c)
+}
+
+// WithMyType sets t as MyType.
+func WithMyType(t MyType) Option {
+	return optionFunc(func(c *config) {
+		c.MyType = t
+	})
+}
+```
+
+#### Instantiation
+
+Using this configuration pattern to configure instantiation with a `NewT`
+function.
+
+```go
+func NewT(options ...Option) T {…}
+```
+
+Any required parameters can be declared before the variadic `options`.
+
+#### Dealing with Overlap
+
+Sometimes there are multiple complex `struct` that share common
+configuration and also have distinct configuration. To avoid repeated
+portions of `config`s, a common `config` can be used with the union of
+options being handled with the `Option` interface.
+
+For example.
+
+```go
+// config holds options for all animals.
+type config struct {
+	Weight      float64
+	Color       string
+	MaxAltitude float64
+}
+
+// DogOption apply Dog specific options.
+type DogOption interface {
+	applyDog(*config)
+}
+
+// BirdOption apply Bird specific options.
+type BirdOption interface {
+	applyBird(*config)
+}
+
+// Option apply options for all animals.
+type Option interface {
+	BirdOption
+	DogOption
+}
+
+type weightOption float64
+func (o weightOption) applyDog(c *config)  { c.Weight = float64(o) }
+func (o weightOption) applyBird(c *config) { c.Weight = float64(o) }
+func WithWeight(w float64) Option          { return weightOption(w) }
+
+type furColorOption string
+func (o furColorOption) applyDog(c *config) { c.Color = string(o) }
+func WithFurColor(c string) DogOption       { return furColorOption(c) }
+
+type maxAltitudeOption float64
+func (o maxAltitudeOption) applyBird(c *config) { c.MaxAltitude = float64(o) }
+func WithMaxAltitude(a float64) BirdOption      { return maxAltitudeOption(a) }
+
+func NewDog(name string, o ...DogOption) Dog    {…}
+func NewBird(name string, o ...BirdOption) Bird {…}
+```
+
+### Interfaces
+
+To allow other developers to better comprehend the code, it is important
+to ensure it is sufficiently documented. One simple measure that contributes
+to this aim is self-documenting by naming method parameters. Therefore,
+where appropriate, methods of every exported interface type should have
+their parameters appropriately named.
+
+#### Interface Stability
+
+All exported stable interfaces that include the following warning in their
+doumentation are allowed to be extended with additional methods.
+
+> Warning: methods may be added to this interface in minor releases.
+
+Otherwise, stable interfaces MUST NOT be modified.
+
+If new functionality is needed for an interface that cannot be changed it MUST
+be added by including an additional interface. That added interface can be a
+simple interface for the specific functionality that you want to add or it can
+be a super-set of the original interface. For example, if you wanted to a
+`Close` method to the `Exporter` interface:
+
+```go
+type Exporter interface {
+	Export()
+}
+```
+
+A new interface, `Closer`, can be added:
+
+```go
+type Closer interface {
+	Close()
+}
+```
+
+Code that is passed the `Exporter` interface can now check to see if the passed
+value also satisfies the new interface. E.g.
+
+```go
+func caller(e Exporter) {
+	/* ... */
+	if c, ok := e.(Closer); ok {
+		c.Close()
+	}
+	/* ... */
+}
+```
+
+Alternatively, a new type that is the super-set of an `Exporter` can be created.
+
+```go
+type ClosingExporter struct {
+	Exporter
+	Close()
+}
+```
+
+This new type can be used similar to the simple interface above in that a
+passed `Exporter` type can be asserted to satisfy the `ClosingExporter` type
+and the `Close` method called.
+
+This super-set approach can be useful if there is explicit behavior that needs
+to be coupled with the original type and passed as a unified type to a new
+function, but, because of this coupling, it also limits the applicability of
+the added functionality. If there exist other interfaces where this
+functionality should be added, each one will need their own super-set
+interfaces and will duplicate the pattern. For this reason, the simple targeted
+interface that defines the specific functionality should be preferred.
+
+## Approvers and Maintainers
+
+Approvers:
+
+- [Evan Torrie](https://github.com/evantorrie), Verizon Media
+- [Josh MacDonald](https://github.com/jmacd), LightStep
+- [Sam Xie](https://github.com/XSAM)
+- [David Ashpole](https://github.com/dashpole), Google
+- [Gustavo Silva Paiva](https://github.com/paivagustavo), LightStep
+- [Aaron Clawson](https://github.com/MadVikingGod)
+
+Maintainers:
+
+- [Anthony Mirabella](https://github.com/Aneurysm9), AWS
+- [Tyler Yahn](https://github.com/MrAlias), Splunk
+
+### Become an Approver or a Maintainer
+
+See the [community membership document in OpenTelemetry community
+repo](https://github.com/open-telemetry/community/blob/main/community-membership.md).
diff --git a/vendor/go.opentelemetry.io/otel/LICENSE b/vendor/go.opentelemetry.io/otel/LICENSE
new file mode 100644
index 000000000..261eeb9e9
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/LICENSE
@@ -0,0 +1,201 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
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+   3. Grant of Patent License. Subject to the terms and conditions of
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+      (except as stated in this section) patent license to make, have made,
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+      Contribution(s) alone or by combination of their Contribution(s)
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+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
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+      (d) If the Work includes a "NOTICE" text file as part of its
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+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
diff --git a/vendor/go.opentelemetry.io/otel/Makefile b/vendor/go.opentelemetry.io/otel/Makefile
new file mode 100644
index 000000000..7df5424e2
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/Makefile
@@ -0,0 +1,183 @@
+# Copyright The OpenTelemetry Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+EXAMPLES := $(shell ./get_main_pkgs.sh ./example)
+TOOLS_MOD_DIR := ./internal/tools
+
+# All source code and documents. Used in spell check.
+ALL_DOCS := $(shell find . -name '*.md' -type f | sort)
+# All directories with go.mod files related to opentelemetry library. Used for building, testing and linting.
+ALL_GO_MOD_DIRS := $(filter-out $(TOOLS_MOD_DIR), $(shell find . -type f -name 'go.mod' -exec dirname {} \; | egrep -v '^./example' | sort)) $(shell find ./example -type f -name 'go.mod' -exec dirname {} \; | sort)
+ALL_COVERAGE_MOD_DIRS := $(shell find . -type f -name 'go.mod' -exec dirname {} \; | egrep -v '^./example|^$(TOOLS_MOD_DIR)' | sort)
+
+GO = go
+TIMEOUT = 60
+
+.DEFAULT_GOAL := precommit
+
+.PHONY: precommit ci
+precommit: dependabot-check license-check lint build examples test-default
+ci: precommit check-clean-work-tree test-coverage
+
+# Tools
+
+TOOLS = $(CURDIR)/.tools
+
+$(TOOLS):
+	@mkdir -p $@
+$(TOOLS)/%: | $(TOOLS)
+	cd $(TOOLS_MOD_DIR) && \
+	$(GO) build -o $@ $(PACKAGE)
+
+SEMCONVGEN = $(TOOLS)/semconv-gen
+$(TOOLS)/semconv-gen: PACKAGE=go.opentelemetry.io/otel/$(TOOLS_MOD_DIR)/semconv-gen
+
+CROSSLINK = $(TOOLS)/crosslink
+$(TOOLS)/crosslink: PACKAGE=go.opentelemetry.io/otel/$(TOOLS_MOD_DIR)/crosslink
+
+GOLANGCI_LINT = $(TOOLS)/golangci-lint
+$(TOOLS)/golangci-lint: PACKAGE=github.com/golangci/golangci-lint/cmd/golangci-lint
+
+MISSPELL = $(TOOLS)/misspell
+$(TOOLS)/misspell: PACKAGE= github.com/client9/misspell/cmd/misspell
+
+STRINGER = $(TOOLS)/stringer
+$(TOOLS)/stringer: PACKAGE=golang.org/x/tools/cmd/stringer
+
+$(TOOLS)/gojq: PACKAGE=github.com/itchyny/gojq/cmd/gojq
+
+.PHONY: tools
+tools: $(CROSSLINK) $(GOLANGCI_LINT) $(MISSPELL) $(STRINGER) $(TOOLS)/gojq $(SEMCONVGEN)
+
+
+# Build
+
+.PHONY: examples generate build
+examples:
+	@set -e; for dir in $(EXAMPLES); do \
+	  echo "$(GO) build $${dir}/..."; \
+	  (cd "$${dir}" && \
+	   $(GO) build .); \
+	done
+
+generate: $(STRINGER)
+	set -e; for dir in $(ALL_GO_MOD_DIRS); do \
+	  echo "$(GO) generate $${dir}/..."; \
+	  (cd "$${dir}" && \
+	    PATH="$(TOOLS):$${PATH}" $(GO) generate ./...); \
+	done
+
+build: generate
+	# Build all package code including testing code.
+	set -e; for dir in $(ALL_GO_MOD_DIRS); do \
+	  echo "$(GO) build $${dir}/..."; \
+	  (cd "$${dir}" && \
+	    $(GO) build ./... && \
+		$(GO) list ./... \
+		  | grep -v third_party \
+		  | xargs $(GO) test -vet=off -run xxxxxMatchNothingxxxxx >/dev/null); \
+	done
+
+# Tests
+
+TEST_TARGETS := test-default test-bench test-short test-verbose test-race
+.PHONY: $(TEST_TARGETS) test
+test-default: ARGS=-v -race
+test-bench:   ARGS=-run=xxxxxMatchNothingxxxxx -test.benchtime=1ms -bench=.
+test-short:   ARGS=-short
+test-verbose: ARGS=-v
+test-race:    ARGS=-race
+$(TEST_TARGETS): test
+test:
+	@set -e; for dir in $(ALL_GO_MOD_DIRS); do \
+	  echo "$(GO) test -timeout $(TIMEOUT)s $(ARGS) $${dir}/..."; \
+	  (cd "$${dir}" && \
+	    $(GO) list ./... \
+		  | grep -v third_party \
+		  | xargs $(GO) test -timeout $(TIMEOUT)s $(ARGS)); \
+	done
+
+COVERAGE_MODE    = atomic
+COVERAGE_PROFILE = coverage.out
+.PHONY: test-coverage
+test-coverage:
+	@set -e; \
+	printf "" > coverage.txt; \
+	for dir in $(ALL_COVERAGE_MOD_DIRS); do \
+	  echo "$(GO) test -coverpkg=./... -covermode=$(COVERAGE_MODE) -coverprofile="$(COVERAGE_PROFILE)" $${dir}/..."; \
+	  (cd "$${dir}" && \
+	    $(GO) list ./... \
+	    | grep -v third_party \
+	    | xargs $(GO) test -coverpkg=./... -covermode=$(COVERAGE_MODE) -coverprofile="$(COVERAGE_PROFILE)" && \
+	  $(GO) tool cover -html=coverage.out -o coverage.html); \
+	  [ -f "$${dir}/coverage.out" ] && cat "$${dir}/coverage.out" >> coverage.txt; \
+	done; \
+	sed -i.bak -e '2,$$ { /^mode: /d; }' coverage.txt
+
+.PHONY: lint
+lint: misspell lint-modules | $(GOLANGCI_LINT)
+	set -e; for dir in $(ALL_GO_MOD_DIRS); do \
+	  echo "golangci-lint in $${dir}"; \
+	  (cd "$${dir}" && \
+	    $(GOLANGCI_LINT) run --fix && \
+	    $(GOLANGCI_LINT) run); \
+	done
+
+.PHONY: misspell
+misspell: | $(MISSPELL)
+	$(MISSPELL) -w $(ALL_DOCS)
+
+.PHONY: lint-modules
+lint-modules: | $(CROSSLINK)
+	set -e; for dir in $(ALL_GO_MOD_DIRS) $(TOOLS_MOD_DIR); do \
+	  echo "$(GO) mod tidy in $${dir}"; \
+	  (cd "$${dir}" && \
+	    $(GO) mod tidy); \
+	done
+	echo "cross-linking all go modules"
+	$(CROSSLINK)
+
+.PHONY: license-check
+license-check:
+	@licRes=$$(for f in $$(find . -type f \( -iname '*.go' -o -iname '*.sh' \) ! -path '**/third_party/*') ; do \
+	           awk '/Copyright The OpenTelemetry Authors|generated|GENERATED/ && NR<=3 { found=1; next } END { if (!found) print FILENAME }' $$f; \
+	   done); \
+	   if [ -n "$${licRes}" ]; then \
+	           echo "license header checking failed:"; echo "$${licRes}"; \
+	           exit 1; \
+	   fi
+
+.PHONY: dependabot-check
+dependabot-check:
+	@result=$$( \
+		for f in $$( find . -type f -name go.mod -exec dirname {} \; | sed 's/^.//' ); \
+			do grep -q "directory: \+$$f" .github/dependabot.yml \
+			|| echo "$$f"; \
+		done; \
+	); \
+	if [ -n "$$result" ]; then \
+		echo "missing go.mod dependabot check:"; echo "$$result"; \
+		echo "new modules need to be added to the .github/dependabot.yml file"; \
+		exit 1; \
+	fi
+
+.PHONY: check-clean-work-tree
+check-clean-work-tree:
+	@if ! git diff --quiet; then \
+	  echo; \
+	  echo 'Working tree is not clean, did you forget to run "make precommit"?'; \
+	  echo; \
+	  git status; \
+	  exit 1; \
+	fi
diff --git a/vendor/go.opentelemetry.io/otel/README.md b/vendor/go.opentelemetry.io/otel/README.md
new file mode 100644
index 000000000..a4852f9f1
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/README.md
@@ -0,0 +1,106 @@
+# OpenTelemetry-Go
+
+[![CI](https://github.com/open-telemetry/opentelemetry-go/workflows/ci/badge.svg)](https://github.com/open-telemetry/opentelemetry-go/actions?query=workflow%3Aci+branch%3Amain)
+[![codecov.io](https://codecov.io/gh/open-telemetry/opentelemetry-go/coverage.svg?branch=main)](https://app.codecov.io/gh/open-telemetry/opentelemetry-go?branch=main)
+[![PkgGoDev](https://pkg.go.dev/badge/go.opentelemetry.io/otel)](https://pkg.go.dev/go.opentelemetry.io/otel)
+[![Go Report Card](https://goreportcard.com/badge/go.opentelemetry.io/otel)](https://goreportcard.com/report/go.opentelemetry.io/otel)
+[![Slack](https://img.shields.io/badge/slack-@cncf/otel--go-brightgreen.svg?logo=slack)](https://cloud-native.slack.com/archives/C01NPAXACKT)
+
+OpenTelemetry-Go is the [Go](https://golang.org/) implementation of [OpenTelemetry](https://opentelemetry.io/).
+It provides a set of APIs to directly measure performance and behavior of your software and send this data to observability platforms.
+
+## Project Status
+
+**Warning**: this project is currently in a pre-GA phase. Backwards
+incompatible changes may be introduced in subsequent minor version releases as
+we work to track the evolving OpenTelemetry specification and user feedback.
+
+Our progress towards a GA release candidate is tracked in [this project
+board](https://github.com/orgs/open-telemetry/projects/5). This release
+candidate will follow semantic versioning and will be released with a major
+version greater than zero.
+
+Progress and status specific to this repository is tracked in our local
+[project boards](https://github.com/open-telemetry/opentelemetry-go/projects)
+and
+[milestones](https://github.com/open-telemetry/opentelemetry-go/milestones).
+
+Project versioning information and stability guarantees can be found in the
+[versioning documentation](./VERSIONING.md).
+
+| Signal | Status |
+| --- | --- |
+| Traces | Stable [release](https://github.com/orgs/open-telemetry/projects/5) is primary focus |
+| Metrics | Development paused [1] |
+| Logs | Frozen [2] |
+
+- [1]: The development of the metrics API and SDK has paused due to limited development resources, prioritization of a stable Traces release, and instability of the official overall design from the OpenTelemetry specification.
+   Pull Requests for metrics related issues are not being accepted currently outside of security vulnerability mitigations.
+- [2]: The Logs signal development is halted for this project while we develop both Traces and Metrics.
+   No Logs Pull Requests are currently being accepted.
+
+### Compatibility
+
+This project is tested on the following systems.
+
+| OS      | Go Version | Architecture |
+| ------- | ---------- | ------------ |
+| Ubuntu  | 1.16       | amd64        |
+| Ubuntu  | 1.15       | amd64        |
+| Ubuntu  | 1.16       | 386          |
+| Ubuntu  | 1.15       | 386          |
+| MacOS   | 1.16       | amd64        |
+| MacOS   | 1.15       | amd64        |
+| Windows | 1.16       | amd64        |
+| Windows | 1.15       | amd64        |
+| Windows | 1.16       | 386          |
+| Windows | 1.15       | 386          |
+
+While this project should work for other systems, no compatibility guarantees
+are made for those systems currently.
+
+## Getting Started
+
+You can find a getting started guide on [opentelemetry.io](https://opentelemetry.io/docs/go/getting-started/).
+
+OpenTelemetry's goal is to provide a single set of APIs to capture distributed
+traces and metrics from your application and send them to an observability
+platform. This project allows you to do just that for applications written in
+Go. There are two steps to this process: instrument your application, and
+configure an exporter.
+
+### Instrumentation
+
+To start capturing distributed traces and metric events from your application
+it first needs to be instrumented. The easiest way to do this is by using an
+instrumentation library for your code. Be sure to check out [the officially
+supported instrumentation
+libraries](https://github.com/open-telemetry/opentelemetry-go-contrib/tree/main/instrumentation).
+
+If you need to extend the telemetry an instrumentation library provides or want
+to build your own instrumentation for your application directly you will need
+to use the
+[go.opentelemetry.io/otel/api](https://pkg.go.dev/go.opentelemetry.io/otel/api)
+package. The included [examples](./example/) are a good way to see some
+practical uses of this process.
+
+### Export
+
+Now that your application is instrumented to collect telemetry, it needs an
+export pipeline to send that telemetry to an observability platform.
+
+All officially supported exporters for the OpenTelemetry project are contained in the [exporters directory](./exporters).
+
+| Exporter                              | Metrics | Traces |
+| :-----------------------------------: | :-----: | :----: |
+| [Jaeger](./exporters/jaeger/)         |         | ✓      |
+| [OTLP](./exporters/otlp/)             | ✓       | ✓      |
+| [Prometheus](./exporters/prometheus/) | ✓       |        |
+| [stdout](./exporters/stdout/)         | ✓       | ✓      |
+| [Zipkin](./exporters/zipkin/)         |         | ✓      |
+
+Additionally, OpenTelemetry community supported exporters can be found in the [contrib repository](https://github.com/open-telemetry/opentelemetry-go-contrib/tree/main/exporters).
+
+## Contributing
+
+See the [contributing documentation](CONTRIBUTING.md).
diff --git a/vendor/go.opentelemetry.io/otel/RELEASING.md b/vendor/go.opentelemetry.io/otel/RELEASING.md
new file mode 100644
index 000000000..215e5c872
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/RELEASING.md
@@ -0,0 +1,120 @@
+# Release Process
+
+## Semantic Convention Generation
+
+If a new version of the OpenTelemetry Specification has been released it will be necessary to generate a new
+semantic convention package from the YAML definitions in the specification repository. There is a utility in
+`internal/tools/semconv-gen` that can be used to generate the a package with the name matching the specification
+version number under the `semconv` package. This will ideally be done soon after the specification release is
+tagged. Make sure that the specification repo contains a checkout of the the latest tagged release so that the
+generated files match the released semantic conventions.
+
+There are currently two categories of semantic conventions that must be generated, `resource` and `trace`.
+
+```
+cd internal/tools/semconv-gen
+go run generator.go -i /path/to/specification/repo/semantic_conventions/resource
+go run generator.go -i /path/to/specification/repo/semantic_conventions/trace
+```
+
+Using default values for all options other than `input` will result in using the `template.j2` template to
+generate `resource.go` and `trace.go` in `/path/to/otelgo/repo/semconv/<version>`.
+
+There are several ancillary files that are not generated and should be copied into the new package from the
+prior package, with updates made as appropriate to canonical import path statements and constant values.
+These files include:
+
+* doc.go
+* exception.go
+* http(_test)?.go
+* schema.go
+
+Uses of the previous schema version in this repository should be updated to use the newly generated version.
+No tooling for this exists at present, so use find/replace in your editor of choice or craft a `grep | sed`
+pipeline if you like living on the edge.
+
+## Pre-Release
+
+Update go.mod for submodules to depend on the new release which will happen in the next step.
+
+1. Run the pre-release script. It creates a branch `pre_release_<new tag>` that will contain all release changes.
+
+    ```
+    ./pre_release.sh -t <new tag>
+    ```
+
+2. Verify the changes.
+
+    ```
+    git diff main
+    ```
+
+    This should have changed the version for all modules to be `<new tag>`.
+
+3. Update the [Changelog](./CHANGELOG.md).
+   - Make sure all relevant changes for this release are included and are in language that non-contributors to the project can understand.
+       To verify this, you can look directly at the commits since the `<last tag>`.
+
+       ```
+       git --no-pager log --pretty=oneline "<last tag>..HEAD"
+       ```
+
+   - Move all the `Unreleased` changes into a new section following the title scheme (`[<new tag>] - <date of release>`).
+   - Update all the appropriate links at the bottom.
+
+4. Push the changes to upstream and create a Pull Request on GitHub.
+    Be sure to include the curated changes from the [Changelog](./CHANGELOG.md) in the description.
+
+## Tag
+
+Once the Pull Request with all the version changes has been approved and merged it is time to tag the merged commit.
+
+***IMPORTANT***: It is critical you use the same tag that you used in the Pre-Release step!
+Failure to do so will leave things in a broken state.
+
+***IMPORTANT***: [There is currently no way to remove an incorrectly tagged version of a Go module](https://github.com/golang/go/issues/34189).
+It is critical you make sure the version you push upstream is correct.
+[Failure to do so will lead to minor emergencies and tough to work around](https://github.com/open-telemetry/opentelemetry-go/issues/331).
+
+1. Run the tag.sh script using the `<commit-hash>` of the commit on the main branch for the merged Pull Request.
+
+    ```
+    ./tag.sh <new tag> <commit-hash>
+    ```
+
+2. Push tags to the upstream remote (not your fork: `github.com/open-telemetry/opentelemetry-go.git`).
+    Make sure you push all sub-modules as well.
+
+    ```
+    git push upstream <new tag>
+    git push upstream <submodules-path/new tag>
+    ...
+    ```
+
+## Release
+
+Finally create a Release for the new `<new tag>` on GitHub.
+The release body should include all the release notes from the Changelog for this release.
+Additionally, the `tag.sh` script generates commit logs since last release which can be used to supplement the release notes.
+
+## Verify Examples
+
+After releasing verify that examples build outside of the repository.
+
+```
+./verify_examples.sh
+```
+
+The script copies examples into a different directory removes any `replace` declarations in `go.mod` and builds them.
+This ensures they build with the published release, not the local copy.
+
+## Post-Release
+
+### Contrib Repository
+
+Once verified be sure to [make a release for the `contrib` repository](https://github.com/open-telemetry/opentelemetry-go-contrib/blob/main/RELEASING.md) that uses this release.
+
+### Website Documentation
+
+Update [the documentation](./website_docs) for [the OpenTelemetry website](https://opentelemetry.io/docs/go/).
+Importantly, bump any package versions referenced to be the latest one you just released and ensure all code examples still compile and are accurate.
diff --git a/vendor/go.opentelemetry.io/otel/VERSIONING.md b/vendor/go.opentelemetry.io/otel/VERSIONING.md
new file mode 100644
index 000000000..fba712f62
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/VERSIONING.md
@@ -0,0 +1,224 @@
+# Versioning
+
+This document describes the versioning policy for this repository. This policy
+is designed so the following goals can be achieved.
+
+**Users are provided a codebase of value that is stable and secure.**
+
+## Policy
+
+* Versioning of this project will be idiomatic of a Go project using [Go
+  modules](https://github.com/golang/go/wiki/Modules).
+  * [Semantic import
+    versioning](https://github.com/golang/go/wiki/Modules#semantic-import-versioning)
+    will be used.
+    * Versions will comply with [semver
+      2.0](https://semver.org/spec/v2.0.0.html) with the following exceptions.
+      * New methods may be added to exported API interfaces. All exported
+        interfaces that fall within this exception will include the following
+        paragraph in their public documentation.
+
+        > Warning: methods may be added to this interface in minor releases.
+
+    * If a module is version `v2` or higher, the major version of the module
+      must be included as a `/vN` at the end of the module paths used in
+      `go.mod` files (e.g., `module go.opentelemetry.io/otel/v2`, `require
+      go.opentelemetry.io/otel/v2 v2.0.1`) and in the package import path
+      (e.g., `import "go.opentelemetry.io/otel/v2/trace"`). This includes the
+      paths used in `go get` commands (e.g., `go get
+      go.opentelemetry.io/otel/v2@v2.0.1`.  Note there is both a `/v2` and a
+      `@v2.0.1` in that example. One way to think about it is that the module
+      name now includes the `/v2`, so include `/v2` whenever you are using the
+      module name).
+    * If a module is version `v0` or `v1`, do not include the major version in
+      either the module path or the import path.
+  * Modules will be used to encapsulate signals and components.
+    * Experimental modules still under active development will be versioned at
+      `v0` to imply the stability guarantee defined by
+      [semver](https://semver.org/spec/v2.0.0.html#spec-item-4).
+
+      > Major version zero (0.y.z) is for initial development. Anything MAY
+      > change at any time. The public API SHOULD NOT be considered stable.
+
+    * Mature modules for which we guarantee a stable public API will be versioned
+      with a major version greater than `v0`.
+      * The decision to make a module stable will be made on a case-by-case
+        basis by the maintainers of this project.
+    * Experimental modules will start their versioning at `v0.0.0` and will
+      increment their minor version when backwards incompatible changes are
+      released and increment their patch version when backwards compatible
+      changes are released.
+    * All stable modules that use the same major version number will use the
+      same entire version number.
+      * Stable modules may be released with an incremented minor or patch
+        version even though that module has not been changed, but rather so
+        that it will remain at the same version as other stable modules that
+        did undergo change.
+      * When an experimental module becomes stable a new stable module version
+        will be released and will include this now stable module. The new
+        stable module version will be an increment of the minor version number
+        and will be applied to all existing stable modules as well as the newly
+        stable module being released.
+* Versioning of the associated [contrib
+  repository](https://github.com/open-telemetry/opentelemetry-go-contrib) of
+  this project will be idiomatic of a Go project using [Go
+  modules](https://github.com/golang/go/wiki/Modules).
+  * [Semantic import
+    versioning](https://github.com/golang/go/wiki/Modules#semantic-import-versioning)
+    will be used.
+    * Versions will comply with [semver 2.0](https://semver.org/spec/v2.0.0.html).
+    * If a module is version `v2` or higher, the
+      major version of the module must be included as a `/vN` at the end of the
+      module paths used in `go.mod` files (e.g., `module
+      go.opentelemetry.io/contrib/instrumentation/host/v2`, `require
+      go.opentelemetry.io/contrib/instrumentation/host/v2 v2.0.1`) and in the
+      package import path (e.g., `import
+      "go.opentelemetry.io/contrib/instrumentation/host/v2"`). This includes
+      the paths used in `go get` commands (e.g., `go get
+      go.opentelemetry.io/contrib/instrumentation/host/v2@v2.0.1`.  Note there
+      is both a `/v2` and a `@v2.0.1` in that example. One way to think about
+      it is that the module name now includes the `/v2`, so include `/v2`
+      whenever you are using the module name).
+    * If a module is version `v0` or `v1`, do not include the major version
+      in either the module path or the import path.
+  * In addition to public APIs, telemetry produced by stable instrumentation
+    will remain stable and backwards compatible. This is to avoid breaking
+    alerts and dashboard.
+  * Modules will be used to encapsulate instrumentation, detectors, exporters,
+    propagators, and any other independent sets of related components.
+    * Experimental modules still under active development will be versioned at
+      `v0` to imply the stability guarantee defined by
+      [semver](https://semver.org/spec/v2.0.0.html#spec-item-4).
+
+      > Major version zero (0.y.z) is for initial development. Anything MAY
+      > change at any time. The public API SHOULD NOT be considered stable.
+
+    * Mature modules for which we guarantee a stable public API and telemetry will
+      be versioned with a major version greater than `v0`.
+    * Experimental modules will start their versioning at `v0.0.0` and will
+      increment their minor version when backwards incompatible changes are
+      released and increment their patch version when backwards compatible
+      changes are released.
+    * Stable contrib modules cannot depend on experimental modules from this
+      project.
+    * All stable contrib modules of the same major version with this project
+      will use the same entire version as this project.
+      * Stable modules may be released with an incremented minor or patch
+        version even though that module's code has not been changed. Instead
+        the only change that will have been included is to have updated that
+        modules dependency on this project's stable APIs.
+      * When an experimental module in contrib becomes stable a new stable
+        module version will be released and will include this now stable
+        module. The new stable module version will be an increment of the minor
+        version number and will be applied to all existing stable contrib
+        modules, this project's modules, and the newly stable module being
+        released.
+  * Contrib modules will be kept up to date with this project's releases.
+    * Due to the dependency contrib modules will implicitly have on this
+      project's modules the release of stable contrib modules to match the
+      released version number will be staggered after this project's release.
+      There is no explicit time guarantee for how long after this projects
+      release the contrib release will be. Effort should be made to keep them
+      as close in time as possible.
+    * No additional stable release in this project can be made until the
+      contrib repository has a matching stable release.
+    * No release can be made in the contrib repository after this project's
+      stable release except for a stable release of the contrib repository.
+* GitHub releases will be made for all releases.
+* Go modules will be made available at Go package mirrors.
+
+## Example Versioning Lifecycle
+
+To better understand the implementation of the above policy the following
+example is provided. This project is simplified to include only the following
+modules and their versions:
+
+* `otel`: `v0.14.0`
+* `otel/trace`: `v0.14.0`
+* `otel/metric`: `v0.14.0`
+* `otel/baggage`: `v0.14.0`
+* `otel/sdk/trace`: `v0.14.0`
+* `otel/sdk/metric`: `v0.14.0`
+
+These modules have been developed to a point where the `otel/trace`,
+`otel/baggage`, and `otel/sdk/trace` modules have reached a point that they
+should be considered for a stable release. The `otel/metric` and
+`otel/sdk/metric` are still under active development and the `otel` module
+depends on both `otel/trace` and `otel/metric`.
+
+The `otel` package is refactored to remove its dependencies on `otel/metric` so
+it can be released as stable as well. With that done the following release
+candidates are made:
+
+* `otel`: `v1.0.0-rc.1`
+* `otel/trace`: `v1.0.0-rc.1`
+* `otel/baggage`: `v1.0.0-rc.1`
+* `otel/sdk/trace`: `v1.0.0-rc.1`
+
+The `otel/metric` and `otel/sdk/metric` modules remain at `v0.14.0`.
+
+A few minor issues are discovered in the `otel/trace` package. These issues are
+resolved with some minor, but backwards incompatible, changes and are released
+as a second release candidate:
+
+* `otel`: `v1.0.0-rc.2`
+* `otel/trace`: `v1.0.0-rc.2`
+* `otel/baggage`: `v1.0.0-rc.2`
+* `otel/sdk/trace`: `v1.0.0-rc.2`
+
+Notice that all module version numbers are incremented to adhere to our
+versioning policy.
+
+After these release candidates have been evaluated to satisfaction, they are
+released as version `v1.0.0`.
+
+* `otel`: `v1.0.0`
+* `otel/trace`: `v1.0.0`
+* `otel/baggage`: `v1.0.0`
+* `otel/sdk/trace`: `v1.0.0`
+
+Since both the `go` utility and the Go module system support [the semantic
+versioning definition of
+precedence](https://semver.org/spec/v2.0.0.html#spec-item-11), this release
+will correctly be interpreted as the successor to the previous release
+candidates.
+
+Active development of this project continues. The `otel/metric` module now has
+backwards incompatible changes to its API that need to be released and the
+`otel/baggage` module has a minor bug fix that needs to be released. The
+following release is made:
+
+* `otel`: `v1.0.1`
+* `otel/trace`: `v1.0.1`
+* `otel/metric`: `v0.15.0`
+* `otel/baggage`: `v1.0.1`
+* `otel/sdk/trace`: `v1.0.1`
+* `otel/sdk/metric`: `v0.15.0`
+
+Notice that, again, all stable module versions are incremented in unison and
+the `otel/sdk/metric` package, which depends on the `otel/metric` package, also
+bumped its version. This bump of the `otel/sdk/metric` package makes sense
+given their coupling, though it is not explicitly required by our versioning
+policy.
+
+As we progress, the `otel/metric` and `otel/sdk/metric` packages have reached a
+point where they should be evaluated for stability. The `otel` module is
+reintegrated with the `otel/metric` package and the following release is made:
+
+* `otel`: `v1.1.0-rc.1`
+* `otel/trace`: `v1.1.0-rc.1`
+* `otel/metric`: `v1.1.0-rc.1`
+* `otel/baggage`: `v1.1.0-rc.1`
+* `otel/sdk/trace`: `v1.1.0-rc.1`
+* `otel/sdk/metric`: `v1.1.0-rc.1`
+
+All the modules are evaluated and determined to a viable stable release. They
+are then released as version `v1.1.0` (the minor version is incremented to
+indicate the addition of new signal).
+
+* `otel`: `v1.1.0`
+* `otel/trace`: `v1.1.0`
+* `otel/metric`: `v1.1.0`
+* `otel/baggage`: `v1.1.0`
+* `otel/sdk/trace`: `v1.1.0`
+* `otel/sdk/metric`: `v1.1.0`
diff --git a/vendor/go.opentelemetry.io/otel/attribute/doc.go b/vendor/go.opentelemetry.io/otel/attribute/doc.go
new file mode 100644
index 000000000..42d090052
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/attribute/doc.go
@@ -0,0 +1,19 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// package attribute provides key and value attributes.
+//
+// This package is currently in a Release Candidate phase. Backwards incompatible changes
+// may be introduced prior to v1.0.0, but we believe the current API is ready to stabilize.
+package attribute // import "go.opentelemetry.io/otel/attribute"
diff --git a/vendor/go.opentelemetry.io/otel/attribute/encoder.go b/vendor/go.opentelemetry.io/otel/attribute/encoder.go
new file mode 100644
index 000000000..8b940f78d
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/attribute/encoder.go
@@ -0,0 +1,150 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package attribute // import "go.opentelemetry.io/otel/attribute"
+
+import (
+	"bytes"
+	"sync"
+	"sync/atomic"
+)
+
+type (
+	// Encoder is a mechanism for serializing a label set into a
+	// specific string representation that supports caching, to
+	// avoid repeated serialization. An example could be an
+	// exporter encoding the label set into a wire representation.
+	Encoder interface {
+		// Encode returns the serialized encoding of the label
+		// set using its Iterator.  This result may be cached
+		// by a attribute.Set.
+		Encode(iterator Iterator) string
+
+		// ID returns a value that is unique for each class of
+		// label encoder.  Label encoders allocate these using
+		// `NewEncoderID`.
+		ID() EncoderID
+	}
+
+	// EncoderID is used to identify distinct Encoder
+	// implementations, for caching encoded results.
+	EncoderID struct {
+		value uint64
+	}
+
+	// defaultLabelEncoder uses a sync.Pool of buffers to reduce
+	// the number of allocations used in encoding labels.  This
+	// implementation encodes a comma-separated list of key=value,
+	// with '/'-escaping of '=', ',', and '\'.
+	defaultLabelEncoder struct {
+		// pool is a pool of labelset builders.  The buffers in this
+		// pool grow to a size that most label encodings will not
+		// allocate new memory.
+		pool sync.Pool // *bytes.Buffer
+	}
+)
+
+// escapeChar is used to ensure uniqueness of the label encoding where
+// keys or values contain either '=' or ','.  Since there is no parser
+// needed for this encoding and its only requirement is to be unique,
+// this choice is arbitrary.  Users will see these in some exporters
+// (e.g., stdout), so the backslash ('\') is used as a conventional choice.
+const escapeChar = '\\'
+
+var (
+	_ Encoder = &defaultLabelEncoder{}
+
+	// encoderIDCounter is for generating IDs for other label
+	// encoders.
+	encoderIDCounter uint64
+
+	defaultEncoderOnce     sync.Once
+	defaultEncoderID       = NewEncoderID()
+	defaultEncoderInstance *defaultLabelEncoder
+)
+
+// NewEncoderID returns a unique label encoder ID. It should be
+// called once per each type of label encoder. Preferably in init() or
+// in var definition.
+func NewEncoderID() EncoderID {
+	return EncoderID{value: atomic.AddUint64(&encoderIDCounter, 1)}
+}
+
+// DefaultEncoder returns a label encoder that encodes labels
+// in such a way that each escaped label's key is followed by an equal
+// sign and then by an escaped label's value. All key-value pairs are
+// separated by a comma.
+//
+// Escaping is done by prepending a backslash before either a
+// backslash, equal sign or a comma.
+func DefaultEncoder() Encoder {
+	defaultEncoderOnce.Do(func() {
+		defaultEncoderInstance = &defaultLabelEncoder{
+			pool: sync.Pool{
+				New: func() interface{} {
+					return &bytes.Buffer{}
+				},
+			},
+		}
+	})
+	return defaultEncoderInstance
+}
+
+// Encode is a part of an implementation of the LabelEncoder
+// interface.
+func (d *defaultLabelEncoder) Encode(iter Iterator) string {
+	buf := d.pool.Get().(*bytes.Buffer)
+	defer d.pool.Put(buf)
+	buf.Reset()
+
+	for iter.Next() {
+		i, keyValue := iter.IndexedLabel()
+		if i > 0 {
+			_, _ = buf.WriteRune(',')
+		}
+		copyAndEscape(buf, string(keyValue.Key))
+
+		_, _ = buf.WriteRune('=')
+
+		if keyValue.Value.Type() == STRING {
+			copyAndEscape(buf, keyValue.Value.AsString())
+		} else {
+			_, _ = buf.WriteString(keyValue.Value.Emit())
+		}
+	}
+	return buf.String()
+}
+
+// ID is a part of an implementation of the LabelEncoder interface.
+func (*defaultLabelEncoder) ID() EncoderID {
+	return defaultEncoderID
+}
+
+// copyAndEscape escapes `=`, `,` and its own escape character (`\`),
+// making the default encoding unique.
+func copyAndEscape(buf *bytes.Buffer, val string) {
+	for _, ch := range val {
+		switch ch {
+		case '=', ',', escapeChar:
+			buf.WriteRune(escapeChar)
+		}
+		buf.WriteRune(ch)
+	}
+}
+
+// Valid returns true if this encoder ID was allocated by
+// `NewEncoderID`.  Invalid encoder IDs will not be cached.
+func (id EncoderID) Valid() bool {
+	return id.value != 0
+}
diff --git a/vendor/go.opentelemetry.io/otel/attribute/iterator.go b/vendor/go.opentelemetry.io/otel/attribute/iterator.go
new file mode 100644
index 000000000..e03aabb62
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/attribute/iterator.go
@@ -0,0 +1,143 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package attribute // import "go.opentelemetry.io/otel/attribute"
+
+// Iterator allows iterating over the set of labels in order,
+// sorted by key.
+type Iterator struct {
+	storage *Set
+	idx     int
+}
+
+// MergeIterator supports iterating over two sets of labels while
+// eliminating duplicate values from the combined set.  The first
+// iterator value takes precedence.
+type MergeIterator struct {
+	one     oneIterator
+	two     oneIterator
+	current KeyValue
+}
+
+type oneIterator struct {
+	iter  Iterator
+	done  bool
+	label KeyValue
+}
+
+// Next moves the iterator to the next position. Returns false if there
+// are no more labels.
+func (i *Iterator) Next() bool {
+	i.idx++
+	return i.idx < i.Len()
+}
+
+// Label returns current KeyValue. Must be called only after Next returns
+// true.
+func (i *Iterator) Label() KeyValue {
+	kv, _ := i.storage.Get(i.idx)
+	return kv
+}
+
+// Attribute is a synonym for Label().
+func (i *Iterator) Attribute() KeyValue {
+	return i.Label()
+}
+
+// IndexedLabel returns current index and attribute. Must be called only
+// after Next returns true.
+func (i *Iterator) IndexedLabel() (int, KeyValue) {
+	return i.idx, i.Label()
+}
+
+// Len returns a number of labels in the iterator's `*Set`.
+func (i *Iterator) Len() int {
+	return i.storage.Len()
+}
+
+// ToSlice is a convenience function that creates a slice of labels
+// from the passed iterator. The iterator is set up to start from the
+// beginning before creating the slice.
+func (i *Iterator) ToSlice() []KeyValue {
+	l := i.Len()
+	if l == 0 {
+		return nil
+	}
+	i.idx = -1
+	slice := make([]KeyValue, 0, l)
+	for i.Next() {
+		slice = append(slice, i.Label())
+	}
+	return slice
+}
+
+// NewMergeIterator returns a MergeIterator for merging two label sets
+// Duplicates are resolved by taking the value from the first set.
+func NewMergeIterator(s1, s2 *Set) MergeIterator {
+	mi := MergeIterator{
+		one: makeOne(s1.Iter()),
+		two: makeOne(s2.Iter()),
+	}
+	return mi
+}
+
+func makeOne(iter Iterator) oneIterator {
+	oi := oneIterator{
+		iter: iter,
+	}
+	oi.advance()
+	return oi
+}
+
+func (oi *oneIterator) advance() {
+	if oi.done = !oi.iter.Next(); !oi.done {
+		oi.label = oi.iter.Label()
+	}
+}
+
+// Next returns true if there is another label available.
+func (m *MergeIterator) Next() bool {
+	if m.one.done && m.two.done {
+		return false
+	}
+	if m.one.done {
+		m.current = m.two.label
+		m.two.advance()
+		return true
+	}
+	if m.two.done {
+		m.current = m.one.label
+		m.one.advance()
+		return true
+	}
+	if m.one.label.Key == m.two.label.Key {
+		m.current = m.one.label // first iterator label value wins
+		m.one.advance()
+		m.two.advance()
+		return true
+	}
+	if m.one.label.Key < m.two.label.Key {
+		m.current = m.one.label
+		m.one.advance()
+		return true
+	}
+	m.current = m.two.label
+	m.two.advance()
+	return true
+}
+
+// Label returns the current value after Next() returns true.
+func (m *MergeIterator) Label() KeyValue {
+	return m.current
+}
diff --git a/vendor/go.opentelemetry.io/otel/attribute/key.go b/vendor/go.opentelemetry.io/otel/attribute/key.go
new file mode 100644
index 000000000..492c438a9
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/attribute/key.go
@@ -0,0 +1,102 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package attribute // import "go.opentelemetry.io/otel/attribute"
+
+// Key represents the key part in key-value pairs. It's a string. The
+// allowed character set in the key depends on the use of the key.
+type Key string
+
+// Bool creates a KeyValue instance with a BOOL Value.
+//
+// If creating both key and a bool value at the same time, then
+// instead of calling Key(name).Bool(value) consider using a
+// convenience function provided by the api/key package -
+// key.Bool(name, value).
+func (k Key) Bool(v bool) KeyValue {
+	return KeyValue{
+		Key:   k,
+		Value: BoolValue(v),
+	}
+}
+
+// Int64 creates a KeyValue instance with an INT64 Value.
+//
+// If creating both key and an int64 value at the same time, then
+// instead of calling Key(name).Int64(value) consider using a
+// convenience function provided by the api/key package -
+// key.Int64(name, value).
+func (k Key) Int64(v int64) KeyValue {
+	return KeyValue{
+		Key:   k,
+		Value: Int64Value(v),
+	}
+}
+
+// Float64 creates a KeyValue instance with a FLOAT64 Value.
+//
+// If creating both key and a float64 value at the same time, then
+// instead of calling Key(name).Float64(value) consider using a
+// convenience function provided by the api/key package -
+// key.Float64(name, value).
+func (k Key) Float64(v float64) KeyValue {
+	return KeyValue{
+		Key:   k,
+		Value: Float64Value(v),
+	}
+}
+
+// String creates a KeyValue instance with a STRING Value.
+//
+// If creating both key and a string value at the same time, then
+// instead of calling Key(name).String(value) consider using a
+// convenience function provided by the api/key package -
+// key.String(name, value).
+func (k Key) String(v string) KeyValue {
+	return KeyValue{
+		Key:   k,
+		Value: StringValue(v),
+	}
+}
+
+// Int creates a KeyValue instance with an INT64 Value.
+//
+// If creating both key and an int value at the same time, then
+// instead of calling Key(name).Int(value) consider using a
+// convenience function provided by the api/key package -
+// key.Int(name, value).
+func (k Key) Int(v int) KeyValue {
+	return KeyValue{
+		Key:   k,
+		Value: IntValue(v),
+	}
+}
+
+// Defined returns true for non-empty keys.
+func (k Key) Defined() bool {
+	return len(k) != 0
+}
+
+// Array creates a KeyValue instance with a ARRAY Value.
+//
+// If creating both key and a array value at the same time, then
+// instead of calling Key(name).String(value) consider using a
+// convenience function provided by the api/key package -
+// key.Array(name, value).
+func (k Key) Array(v interface{}) KeyValue {
+	return KeyValue{
+		Key:   k,
+		Value: ArrayValue(v),
+	}
+}
diff --git a/vendor/go.opentelemetry.io/otel/attribute/kv.go b/vendor/go.opentelemetry.io/otel/attribute/kv.go
new file mode 100644
index 000000000..2fcc8863f
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/attribute/kv.go
@@ -0,0 +1,108 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package attribute // import "go.opentelemetry.io/otel/attribute"
+
+import (
+	"encoding/json"
+	"fmt"
+	"reflect"
+)
+
+// KeyValue holds a key and value pair.
+type KeyValue struct {
+	Key   Key
+	Value Value
+}
+
+// Valid returns if kv is a valid OpenTelemetry attribute.
+func (kv KeyValue) Valid() bool {
+	return kv.Key != "" && kv.Value.Type() != INVALID
+}
+
+// Bool creates a new key-value pair with a passed name and a bool
+// value.
+func Bool(k string, v bool) KeyValue {
+	return Key(k).Bool(v)
+}
+
+// Int64 creates a new key-value pair with a passed name and an int64
+// value.
+func Int64(k string, v int64) KeyValue {
+	return Key(k).Int64(v)
+}
+
+// Float64 creates a new key-value pair with a passed name and a float64
+// value.
+func Float64(k string, v float64) KeyValue {
+	return Key(k).Float64(v)
+}
+
+// String creates a new key-value pair with a passed name and a string
+// value.
+func String(k, v string) KeyValue {
+	return Key(k).String(v)
+}
+
+// Stringer creates a new key-value pair with a passed name and a string
+// value generated by the passed Stringer interface.
+func Stringer(k string, v fmt.Stringer) KeyValue {
+	return Key(k).String(v.String())
+}
+
+// Int creates a new key-value pair instance with a passed name and
+// either an int32 or an int64 value, depending on whether the int
+// type is 32 or 64 bits wide.
+func Int(k string, v int) KeyValue {
+	return Key(k).Int(v)
+}
+
+// Array creates a new key-value pair with a passed name and a array.
+// Only arrays of primitive type are supported.
+func Array(k string, v interface{}) KeyValue {
+	return Key(k).Array(v)
+}
+
+// Any creates a new key-value pair instance with a passed name and
+// automatic type inference. This is slower, and not type-safe.
+func Any(k string, value interface{}) KeyValue {
+	if value == nil {
+		return String(k, "<nil>")
+	}
+
+	if stringer, ok := value.(fmt.Stringer); ok {
+		return String(k, stringer.String())
+	}
+
+	rv := reflect.ValueOf(value)
+
+	switch rv.Kind() {
+	case reflect.Array, reflect.Slice:
+		return Array(k, value)
+	case reflect.Bool:
+		return Bool(k, rv.Bool())
+	case reflect.Int, reflect.Int8, reflect.Int16:
+		return Int(k, int(rv.Int()))
+	case reflect.Int64:
+		return Int64(k, rv.Int())
+	case reflect.Float64:
+		return Float64(k, rv.Float())
+	case reflect.String:
+		return String(k, rv.String())
+	}
+	if b, err := json.Marshal(value); b != nil && err == nil {
+		return String(k, string(b))
+	}
+	return String(k, fmt.Sprint(value))
+}
diff --git a/vendor/go.opentelemetry.io/otel/attribute/set.go b/vendor/go.opentelemetry.io/otel/attribute/set.go
new file mode 100644
index 000000000..bd591894d
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/attribute/set.go
@@ -0,0 +1,426 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package attribute // import "go.opentelemetry.io/otel/attribute"
+
+import (
+	"encoding/json"
+	"reflect"
+	"sort"
+)
+
+type (
+	// Set is the representation for a distinct label set.  It
+	// manages an immutable set of labels, with an internal cache
+	// for storing label encodings.
+	//
+	// This type supports the `Equivalent` method of comparison
+	// using values of type `Distinct`.
+	//
+	// This type is used to implement:
+	// 1. Metric labels
+	// 2. Resource sets
+	// 3. Correlation map (TODO)
+	Set struct {
+		equivalent Distinct
+	}
+
+	// Distinct wraps a variable-size array of `KeyValue`,
+	// constructed with keys in sorted order.  This can be used as
+	// a map key or for equality checking between Sets.
+	Distinct struct {
+		iface interface{}
+	}
+
+	// Filter supports removing certain labels from label sets.
+	// When the filter returns true, the label will be kept in
+	// the filtered label set.  When the filter returns false, the
+	// label is excluded from the filtered label set, and the
+	// label instead appears in the `removed` list of excluded labels.
+	Filter func(KeyValue) bool
+
+	// Sortable implements `sort.Interface`, used for sorting
+	// `KeyValue`.  This is an exported type to support a
+	// memory optimization.  A pointer to one of these is needed
+	// for the call to `sort.Stable()`, which the caller may
+	// provide in order to avoid an allocation.  See
+	// `NewSetWithSortable()`.
+	Sortable []KeyValue
+)
+
+var (
+	// keyValueType is used in `computeDistinctReflect`.
+	keyValueType = reflect.TypeOf(KeyValue{})
+
+	// emptySet is returned for empty label sets.
+	emptySet = &Set{
+		equivalent: Distinct{
+			iface: [0]KeyValue{},
+		},
+	}
+)
+
+// EmptySet returns a reference to a Set with no elements.
+//
+// This is a convenience provided for optimized calling utility.
+func EmptySet() *Set {
+	return emptySet
+}
+
+// reflect abbreviates `reflect.ValueOf`.
+func (d Distinct) reflect() reflect.Value {
+	return reflect.ValueOf(d.iface)
+}
+
+// Valid returns true if this value refers to a valid `*Set`.
+func (d Distinct) Valid() bool {
+	return d.iface != nil
+}
+
+// Len returns the number of labels in this set.
+func (l *Set) Len() int {
+	if l == nil || !l.equivalent.Valid() {
+		return 0
+	}
+	return l.equivalent.reflect().Len()
+}
+
+// Get returns the KeyValue at ordered position `idx` in this set.
+func (l *Set) Get(idx int) (KeyValue, bool) {
+	if l == nil {
+		return KeyValue{}, false
+	}
+	value := l.equivalent.reflect()
+
+	if idx >= 0 && idx < value.Len() {
+		// Note: The Go compiler successfully avoids an allocation for
+		// the interface{} conversion here:
+		return value.Index(idx).Interface().(KeyValue), true
+	}
+
+	return KeyValue{}, false
+}
+
+// Value returns the value of a specified key in this set.
+func (l *Set) Value(k Key) (Value, bool) {
+	if l == nil {
+		return Value{}, false
+	}
+	rValue := l.equivalent.reflect()
+	vlen := rValue.Len()
+
+	idx := sort.Search(vlen, func(idx int) bool {
+		return rValue.Index(idx).Interface().(KeyValue).Key >= k
+	})
+	if idx >= vlen {
+		return Value{}, false
+	}
+	keyValue := rValue.Index(idx).Interface().(KeyValue)
+	if k == keyValue.Key {
+		return keyValue.Value, true
+	}
+	return Value{}, false
+}
+
+// HasValue tests whether a key is defined in this set.
+func (l *Set) HasValue(k Key) bool {
+	if l == nil {
+		return false
+	}
+	_, ok := l.Value(k)
+	return ok
+}
+
+// Iter returns an iterator for visiting the labels in this set.
+func (l *Set) Iter() Iterator {
+	return Iterator{
+		storage: l,
+		idx:     -1,
+	}
+}
+
+// ToSlice returns the set of labels belonging to this set, sorted,
+// where keys appear no more than once.
+func (l *Set) ToSlice() []KeyValue {
+	iter := l.Iter()
+	return iter.ToSlice()
+}
+
+// Equivalent returns a value that may be used as a map key.  The
+// Distinct type guarantees that the result will equal the equivalent
+// Distinct value of any label set with the same elements as this,
+// where sets are made unique by choosing the last value in the input
+// for any given key.
+func (l *Set) Equivalent() Distinct {
+	if l == nil || !l.equivalent.Valid() {
+		return emptySet.equivalent
+	}
+	return l.equivalent
+}
+
+// Equals returns true if the argument set is equivalent to this set.
+func (l *Set) Equals(o *Set) bool {
+	return l.Equivalent() == o.Equivalent()
+}
+
+// Encoded returns the encoded form of this set, according to
+// `encoder`.
+func (l *Set) Encoded(encoder Encoder) string {
+	if l == nil || encoder == nil {
+		return ""
+	}
+
+	return encoder.Encode(l.Iter())
+}
+
+func empty() Set {
+	return Set{
+		equivalent: emptySet.equivalent,
+	}
+}
+
+// NewSet returns a new `Set`.  See the documentation for
+// `NewSetWithSortableFiltered` for more details.
+//
+// Except for empty sets, this method adds an additional allocation
+// compared with calls that include a `*Sortable`.
+func NewSet(kvs ...KeyValue) Set {
+	// Check for empty set.
+	if len(kvs) == 0 {
+		return empty()
+	}
+	s, _ := NewSetWithSortableFiltered(kvs, new(Sortable), nil)
+	return s
+}
+
+// NewSetWithSortable returns a new `Set`.  See the documentation for
+// `NewSetWithSortableFiltered` for more details.
+//
+// This call includes a `*Sortable` option as a memory optimization.
+func NewSetWithSortable(kvs []KeyValue, tmp *Sortable) Set {
+	// Check for empty set.
+	if len(kvs) == 0 {
+		return empty()
+	}
+	s, _ := NewSetWithSortableFiltered(kvs, tmp, nil)
+	return s
+}
+
+// NewSetWithFiltered returns a new `Set`.  See the documentation for
+// `NewSetWithSortableFiltered` for more details.
+//
+// This call includes a `Filter` to include/exclude label keys from
+// the return value.  Excluded keys are returned as a slice of label
+// values.
+func NewSetWithFiltered(kvs []KeyValue, filter Filter) (Set, []KeyValue) {
+	// Check for empty set.
+	if len(kvs) == 0 {
+		return empty(), nil
+	}
+	return NewSetWithSortableFiltered(kvs, new(Sortable), filter)
+}
+
+// NewSetWithSortableFiltered returns a new `Set`.
+//
+// Duplicate keys are eliminated by taking the last value.  This
+// re-orders the input slice so that unique last-values are contiguous
+// at the end of the slice.
+//
+// This ensures the following:
+//
+// - Last-value-wins semantics
+// - Caller sees the reordering, but doesn't lose values
+// - Repeated call preserve last-value wins.
+//
+// Note that methods are defined on `*Set`, although this returns `Set`.
+// Callers can avoid memory allocations by:
+//
+// - allocating a `Sortable` for use as a temporary in this method
+// - allocating a `Set` for storing the return value of this
+//   constructor.
+//
+// The result maintains a cache of encoded labels, by attribute.EncoderID.
+// This value should not be copied after its first use.
+//
+// The second `[]KeyValue` return value is a list of labels that were
+// excluded by the Filter (if non-nil).
+func NewSetWithSortableFiltered(kvs []KeyValue, tmp *Sortable, filter Filter) (Set, []KeyValue) {
+	// Check for empty set.
+	if len(kvs) == 0 {
+		return empty(), nil
+	}
+
+	*tmp = kvs
+
+	// Stable sort so the following de-duplication can implement
+	// last-value-wins semantics.
+	sort.Stable(tmp)
+
+	*tmp = nil
+
+	position := len(kvs) - 1
+	offset := position - 1
+
+	// The requirements stated above require that the stable
+	// result be placed in the end of the input slice, while
+	// overwritten values are swapped to the beginning.
+	//
+	// De-duplicate with last-value-wins semantics.  Preserve
+	// duplicate values at the beginning of the input slice.
+	for ; offset >= 0; offset-- {
+		if kvs[offset].Key == kvs[position].Key {
+			continue
+		}
+		position--
+		kvs[offset], kvs[position] = kvs[position], kvs[offset]
+	}
+	if filter != nil {
+		return filterSet(kvs[position:], filter)
+	}
+	return Set{
+		equivalent: computeDistinct(kvs[position:]),
+	}, nil
+}
+
+// filterSet reorders `kvs` so that included keys are contiguous at
+// the end of the slice, while excluded keys precede the included keys.
+func filterSet(kvs []KeyValue, filter Filter) (Set, []KeyValue) {
+	var excluded []KeyValue
+
+	// Move labels that do not match the filter so
+	// they're adjacent before calling computeDistinct().
+	distinctPosition := len(kvs)
+
+	// Swap indistinct keys forward and distinct keys toward the
+	// end of the slice.
+	offset := len(kvs) - 1
+	for ; offset >= 0; offset-- {
+		if filter(kvs[offset]) {
+			distinctPosition--
+			kvs[offset], kvs[distinctPosition] = kvs[distinctPosition], kvs[offset]
+			continue
+		}
+	}
+	excluded = kvs[:distinctPosition]
+
+	return Set{
+		equivalent: computeDistinct(kvs[distinctPosition:]),
+	}, excluded
+}
+
+// Filter returns a filtered copy of this `Set`.  See the
+// documentation for `NewSetWithSortableFiltered` for more details.
+func (l *Set) Filter(re Filter) (Set, []KeyValue) {
+	if re == nil {
+		return Set{
+			equivalent: l.equivalent,
+		}, nil
+	}
+
+	// Note: This could be refactored to avoid the temporary slice
+	// allocation, if it proves to be expensive.
+	return filterSet(l.ToSlice(), re)
+}
+
+// computeDistinct returns a `Distinct` using either the fixed- or
+// reflect-oriented code path, depending on the size of the input.
+// The input slice is assumed to already be sorted and de-duplicated.
+func computeDistinct(kvs []KeyValue) Distinct {
+	iface := computeDistinctFixed(kvs)
+	if iface == nil {
+		iface = computeDistinctReflect(kvs)
+	}
+	return Distinct{
+		iface: iface,
+	}
+}
+
+// computeDistinctFixed computes a `Distinct` for small slices.  It
+// returns nil if the input is too large for this code path.
+func computeDistinctFixed(kvs []KeyValue) interface{} {
+	switch len(kvs) {
+	case 1:
+		ptr := new([1]KeyValue)
+		copy((*ptr)[:], kvs)
+		return *ptr
+	case 2:
+		ptr := new([2]KeyValue)
+		copy((*ptr)[:], kvs)
+		return *ptr
+	case 3:
+		ptr := new([3]KeyValue)
+		copy((*ptr)[:], kvs)
+		return *ptr
+	case 4:
+		ptr := new([4]KeyValue)
+		copy((*ptr)[:], kvs)
+		return *ptr
+	case 5:
+		ptr := new([5]KeyValue)
+		copy((*ptr)[:], kvs)
+		return *ptr
+	case 6:
+		ptr := new([6]KeyValue)
+		copy((*ptr)[:], kvs)
+		return *ptr
+	case 7:
+		ptr := new([7]KeyValue)
+		copy((*ptr)[:], kvs)
+		return *ptr
+	case 8:
+		ptr := new([8]KeyValue)
+		copy((*ptr)[:], kvs)
+		return *ptr
+	case 9:
+		ptr := new([9]KeyValue)
+		copy((*ptr)[:], kvs)
+		return *ptr
+	case 10:
+		ptr := new([10]KeyValue)
+		copy((*ptr)[:], kvs)
+		return *ptr
+	default:
+		return nil
+	}
+}
+
+// computeDistinctReflect computes a `Distinct` using reflection,
+// works for any size input.
+func computeDistinctReflect(kvs []KeyValue) interface{} {
+	at := reflect.New(reflect.ArrayOf(len(kvs), keyValueType)).Elem()
+	for i, keyValue := range kvs {
+		*(at.Index(i).Addr().Interface().(*KeyValue)) = keyValue
+	}
+	return at.Interface()
+}
+
+// MarshalJSON returns the JSON encoding of the `*Set`.
+func (l *Set) MarshalJSON() ([]byte, error) {
+	return json.Marshal(l.equivalent.iface)
+}
+
+// Len implements `sort.Interface`.
+func (l *Sortable) Len() int {
+	return len(*l)
+}
+
+// Swap implements `sort.Interface`.
+func (l *Sortable) Swap(i, j int) {
+	(*l)[i], (*l)[j] = (*l)[j], (*l)[i]
+}
+
+// Less implements `sort.Interface`.
+func (l *Sortable) Less(i, j int) bool {
+	return (*l)[i].Key < (*l)[j].Key
+}
diff --git a/vendor/go.opentelemetry.io/otel/attribute/type_string.go b/vendor/go.opentelemetry.io/otel/attribute/type_string.go
new file mode 100644
index 000000000..1f2c7dccf
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/attribute/type_string.go
@@ -0,0 +1,28 @@
+// Code generated by "stringer -type=Type"; DO NOT EDIT.
+
+package attribute
+
+import "strconv"
+
+func _() {
+	// An "invalid array index" compiler error signifies that the constant values have changed.
+	// Re-run the stringer command to generate them again.
+	var x [1]struct{}
+	_ = x[INVALID-0]
+	_ = x[BOOL-1]
+	_ = x[INT64-2]
+	_ = x[FLOAT64-3]
+	_ = x[STRING-4]
+	_ = x[ARRAY-5]
+}
+
+const _Type_name = "INVALIDBOOLINT64FLOAT64STRINGARRAY"
+
+var _Type_index = [...]uint8{0, 7, 11, 16, 23, 29, 34}
+
+func (i Type) String() string {
+	if i < 0 || i >= Type(len(_Type_index)-1) {
+		return "Type(" + strconv.FormatInt(int64(i), 10) + ")"
+	}
+	return _Type_name[_Type_index[i]:_Type_index[i+1]]
+}
diff --git a/vendor/go.opentelemetry.io/otel/attribute/value.go b/vendor/go.opentelemetry.io/otel/attribute/value.go
new file mode 100644
index 000000000..7b979409e
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/attribute/value.go
@@ -0,0 +1,204 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package attribute // import "go.opentelemetry.io/otel/attribute"
+
+import (
+	"encoding/json"
+	"fmt"
+	"reflect"
+	"strconv"
+
+	"go.opentelemetry.io/otel/internal"
+)
+
+//go:generate stringer -type=Type
+
+// Type describes the type of the data Value holds.
+type Type int
+
+// Value represents the value part in key-value pairs.
+type Value struct {
+	vtype    Type
+	numeric  uint64
+	stringly string
+	// TODO Lazy value type?
+
+	array interface{}
+}
+
+const (
+	// INVALID is used for a Value with no value set.
+	INVALID Type = iota
+	// BOOL is a boolean Type Value.
+	BOOL
+	// INT64 is a 64-bit signed integral Type Value.
+	INT64
+	// FLOAT64 is a 64-bit floating point Type Value.
+	FLOAT64
+	// STRING is a string Type Value.
+	STRING
+	// ARRAY is an array Type Value used to store 1-dimensional slices or
+	// arrays of bool, int, int32, int64, uint, uint32, uint64, float,
+	// float32, float64, or string types.
+	ARRAY
+)
+
+// BoolValue creates a BOOL Value.
+func BoolValue(v bool) Value {
+	return Value{
+		vtype:   BOOL,
+		numeric: internal.BoolToRaw(v),
+	}
+}
+
+// Int64Value creates an INT64 Value.
+func Int64Value(v int64) Value {
+	return Value{
+		vtype:   INT64,
+		numeric: internal.Int64ToRaw(v),
+	}
+}
+
+// Float64Value creates a FLOAT64 Value.
+func Float64Value(v float64) Value {
+	return Value{
+		vtype:   FLOAT64,
+		numeric: internal.Float64ToRaw(v),
+	}
+}
+
+// StringValue creates a STRING Value.
+func StringValue(v string) Value {
+	return Value{
+		vtype:    STRING,
+		stringly: v,
+	}
+}
+
+// IntValue creates an INT64 Value.
+func IntValue(v int) Value {
+	return Int64Value(int64(v))
+}
+
+// ArrayValue creates an ARRAY value from an array or slice.
+// Only arrays or slices of bool, int, int64, float, float64, or string types are allowed.
+// Specifically, arrays  and slices can not contain other arrays, slices, structs, or non-standard
+// types. If the passed value is not an array or slice of these types an
+// INVALID value is returned.
+func ArrayValue(v interface{}) Value {
+	switch reflect.TypeOf(v).Kind() {
+	case reflect.Array, reflect.Slice:
+		// get array type regardless of dimensions
+		typ := reflect.TypeOf(v).Elem()
+		kind := typ.Kind()
+		switch kind {
+		case reflect.Bool, reflect.Int, reflect.Int64,
+			reflect.Float64, reflect.String:
+			val := reflect.ValueOf(v)
+			length := val.Len()
+			frozen := reflect.Indirect(reflect.New(reflect.ArrayOf(length, typ)))
+			reflect.Copy(frozen, val)
+			return Value{
+				vtype: ARRAY,
+				array: frozen.Interface(),
+			}
+		default:
+			return Value{vtype: INVALID}
+		}
+	}
+	return Value{vtype: INVALID}
+}
+
+// Type returns a type of the Value.
+func (v Value) Type() Type {
+	return v.vtype
+}
+
+// AsBool returns the bool value. Make sure that the Value's type is
+// BOOL.
+func (v Value) AsBool() bool {
+	return internal.RawToBool(v.numeric)
+}
+
+// AsInt64 returns the int64 value. Make sure that the Value's type is
+// INT64.
+func (v Value) AsInt64() int64 {
+	return internal.RawToInt64(v.numeric)
+}
+
+// AsFloat64 returns the float64 value. Make sure that the Value's
+// type is FLOAT64.
+func (v Value) AsFloat64() float64 {
+	return internal.RawToFloat64(v.numeric)
+}
+
+// AsString returns the string value. Make sure that the Value's type
+// is STRING.
+func (v Value) AsString() string {
+	return v.stringly
+}
+
+// AsArray returns the array Value as an interface{}.
+func (v Value) AsArray() interface{} {
+	return v.array
+}
+
+type unknownValueType struct{}
+
+// AsInterface returns Value's data as interface{}.
+func (v Value) AsInterface() interface{} {
+	switch v.Type() {
+	case ARRAY:
+		return v.AsArray()
+	case BOOL:
+		return v.AsBool()
+	case INT64:
+		return v.AsInt64()
+	case FLOAT64:
+		return v.AsFloat64()
+	case STRING:
+		return v.stringly
+	}
+	return unknownValueType{}
+}
+
+// Emit returns a string representation of Value's data.
+func (v Value) Emit() string {
+	switch v.Type() {
+	case ARRAY:
+		return fmt.Sprint(v.array)
+	case BOOL:
+		return strconv.FormatBool(v.AsBool())
+	case INT64:
+		return strconv.FormatInt(v.AsInt64(), 10)
+	case FLOAT64:
+		return fmt.Sprint(v.AsFloat64())
+	case STRING:
+		return v.stringly
+	default:
+		return "unknown"
+	}
+}
+
+// MarshalJSON returns the JSON encoding of the Value.
+func (v Value) MarshalJSON() ([]byte, error) {
+	var jsonVal struct {
+		Type  string
+		Value interface{}
+	}
+	jsonVal.Type = v.Type().String()
+	jsonVal.Value = v.AsInterface()
+	return json.Marshal(jsonVal)
+}
diff --git a/vendor/go.opentelemetry.io/otel/baggage/baggage.go b/vendor/go.opentelemetry.io/otel/baggage/baggage.go
new file mode 100644
index 000000000..8de2bc9df
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/baggage/baggage.go
@@ -0,0 +1,509 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package baggage
+
+import (
+	"errors"
+	"fmt"
+	"net/url"
+	"regexp"
+	"strings"
+
+	"go.opentelemetry.io/otel/internal/baggage"
+)
+
+const (
+	maxMembers               = 180
+	maxBytesPerMembers       = 4096
+	maxBytesPerBaggageString = 8192
+
+	listDelimiter     = ","
+	keyValueDelimiter = "="
+	propertyDelimiter = ";"
+
+	keyDef      = `([\x21\x23-\x27\x2A\x2B\x2D\x2E\x30-\x39\x41-\x5a\x5e-\x7a\x7c\x7e]+)`
+	valueDef    = `([\x21\x23-\x2b\x2d-\x3a\x3c-\x5B\x5D-\x7e]*)`
+	keyValueDef = `\s*` + keyDef + `\s*` + keyValueDelimiter + `\s*` + valueDef + `\s*`
+)
+
+var (
+	keyRe      = regexp.MustCompile(`^` + keyDef + `$`)
+	valueRe    = regexp.MustCompile(`^` + valueDef + `$`)
+	propertyRe = regexp.MustCompile(`^(?:\s*` + keyDef + `\s*|` + keyValueDef + `)$`)
+)
+
+var (
+	errInvalidKey      = errors.New("invalid key")
+	errInvalidValue    = errors.New("invalid value")
+	errInvalidProperty = errors.New("invalid baggage list-member property")
+	errInvalidMember   = errors.New("invalid baggage list-member")
+	errMemberNumber    = errors.New("too many list-members in baggage-string")
+	errMemberBytes     = errors.New("list-member too large")
+	errBaggageBytes    = errors.New("baggage-string too large")
+)
+
+// Property is an additional metadata entry for a baggage list-member.
+type Property struct {
+	key, value string
+
+	// hasValue indicates if a zero-value value means the property does not
+	// have a value or if it was the zero-value.
+	hasValue bool
+}
+
+func NewKeyProperty(key string) (Property, error) {
+	p := Property{}
+	if !keyRe.MatchString(key) {
+		return p, fmt.Errorf("%w: %q", errInvalidKey, key)
+	}
+	p.key = key
+	return p, nil
+}
+
+func NewKeyValueProperty(key, value string) (Property, error) {
+	p := Property{}
+	if !keyRe.MatchString(key) {
+		return p, fmt.Errorf("%w: %q", errInvalidKey, key)
+	}
+	if !valueRe.MatchString(value) {
+		return p, fmt.Errorf("%w: %q", errInvalidValue, value)
+	}
+	p.key = key
+	p.value = value
+	p.hasValue = true
+	return p, nil
+}
+
+// parseProperty attempts to decode a Property from the passed string. It
+// returns an error if the input is invalid according to the W3C Baggage
+// specification.
+func parseProperty(property string) (Property, error) {
+	p := Property{}
+	if property == "" {
+		return p, nil
+	}
+
+	match := propertyRe.FindStringSubmatch(property)
+	if len(match) != 4 {
+		return p, fmt.Errorf("%w: %q", errInvalidProperty, property)
+	}
+
+	if match[1] != "" {
+		p.key = match[1]
+	} else {
+		p.key = match[2]
+		p.value = match[3]
+		p.hasValue = true
+	}
+	return p, nil
+}
+
+// validate ensures p conforms to the W3C Baggage specification, returning an
+// error otherwise.
+func (p Property) validate() error {
+	errFunc := func(err error) error {
+		return fmt.Errorf("invalid property: %w", err)
+	}
+
+	if !keyRe.MatchString(p.key) {
+		return errFunc(fmt.Errorf("%w: %q", errInvalidKey, p.key))
+	}
+	if p.hasValue && !valueRe.MatchString(p.value) {
+		return errFunc(fmt.Errorf("%w: %q", errInvalidValue, p.value))
+	}
+	if !p.hasValue && p.value != "" {
+		return errFunc(errors.New("inconsistent value"))
+	}
+	return nil
+}
+
+// Key returns the Property key.
+func (p Property) Key() string {
+	return p.key
+}
+
+// Value returns the Property value. Additionally a boolean value is returned
+// indicating if the returned value is the empty if the Property has a value
+// that is empty or if the value is not set.
+func (p Property) Value() (string, bool) {
+	return p.value, p.hasValue
+}
+
+// String encodes Property into a string compliant with the W3C Baggage
+// specification.
+func (p Property) String() string {
+	if p.hasValue {
+		return fmt.Sprintf("%s%s%v", p.key, keyValueDelimiter, p.value)
+	}
+	return p.key
+}
+
+type properties []Property
+
+func fromInternalProperties(iProps []baggage.Property) properties {
+	if len(iProps) == 0 {
+		return nil
+	}
+
+	props := make(properties, len(iProps))
+	for i, p := range iProps {
+		props[i] = Property{
+			key:      p.Key,
+			value:    p.Value,
+			hasValue: p.HasValue,
+		}
+	}
+	return props
+}
+
+func (p properties) asInternal() []baggage.Property {
+	if len(p) == 0 {
+		return nil
+	}
+
+	iProps := make([]baggage.Property, len(p))
+	for i, prop := range p {
+		iProps[i] = baggage.Property{
+			Key:      prop.key,
+			Value:    prop.value,
+			HasValue: prop.hasValue,
+		}
+	}
+	return iProps
+}
+
+func (p properties) Copy() properties {
+	if len(p) == 0 {
+		return nil
+	}
+
+	props := make(properties, len(p))
+	copy(props, p)
+	return props
+}
+
+// validate ensures each Property in p conforms to the W3C Baggage
+// specification, returning an error otherwise.
+func (p properties) validate() error {
+	for _, prop := range p {
+		if err := prop.validate(); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// String encodes properties into a string compliant with the W3C Baggage
+// specification.
+func (p properties) String() string {
+	props := make([]string, len(p))
+	for i, prop := range p {
+		props[i] = prop.String()
+	}
+	return strings.Join(props, propertyDelimiter)
+}
+
+// Member is a list-member of a baggage-string as defined by the W3C Baggage
+// specification.
+type Member struct {
+	key, value string
+	properties properties
+}
+
+// NewMember returns a new Member from the passed arguments. An error is
+// returned if the created Member would be invalid according to the W3C
+// Baggage specification.
+func NewMember(key, value string, props ...Property) (Member, error) {
+	m := Member{key: key, value: value, properties: properties(props).Copy()}
+	if err := m.validate(); err != nil {
+		return Member{}, err
+	}
+
+	return m, nil
+}
+
+// parseMember attempts to decode a Member from the passed string. It returns
+// an error if the input is invalid according to the W3C Baggage
+// specification.
+func parseMember(member string) (Member, error) {
+	if n := len(member); n > maxBytesPerMembers {
+		return Member{}, fmt.Errorf("%w: %d", errMemberBytes, n)
+	}
+
+	var (
+		key, value string
+		props      properties
+	)
+
+	parts := strings.SplitN(member, propertyDelimiter, 2)
+	switch len(parts) {
+	case 2:
+		// Parse the member properties.
+		for _, pStr := range strings.Split(parts[1], propertyDelimiter) {
+			p, err := parseProperty(pStr)
+			if err != nil {
+				return Member{}, err
+			}
+			props = append(props, p)
+		}
+		fallthrough
+	case 1:
+		// Parse the member key/value pair.
+
+		// Take into account a value can contain equal signs (=).
+		kv := strings.SplitN(parts[0], keyValueDelimiter, 2)
+		if len(kv) != 2 {
+			return Member{}, fmt.Errorf("%w: %q", errInvalidMember, member)
+		}
+		// "Leading and trailing whitespaces are allowed but MUST be trimmed
+		// when converting the header into a data structure."
+		key, value = strings.TrimSpace(kv[0]), strings.TrimSpace(kv[1])
+		if !keyRe.MatchString(key) {
+			return Member{}, fmt.Errorf("%w: %q", errInvalidKey, key)
+		}
+		if !valueRe.MatchString(value) {
+			return Member{}, fmt.Errorf("%w: %q", errInvalidValue, value)
+		}
+	default:
+		// This should never happen unless a developer has changed the string
+		// splitting somehow. Panic instead of failing silently and allowing
+		// the bug to slip past the CI checks.
+		panic("failed to parse baggage member")
+	}
+
+	return Member{key: key, value: value, properties: props}, nil
+}
+
+// validate ensures m conforms to the W3C Baggage specification, returning an
+// error otherwise.
+func (m Member) validate() error {
+	if !keyRe.MatchString(m.key) {
+		return fmt.Errorf("%w: %q", errInvalidKey, m.key)
+	}
+	if !valueRe.MatchString(m.value) {
+		return fmt.Errorf("%w: %q", errInvalidValue, m.value)
+	}
+	return m.properties.validate()
+}
+
+// Key returns the Member key.
+func (m Member) Key() string { return m.key }
+
+// Value returns the Member value.
+func (m Member) Value() string { return m.value }
+
+// Properties returns a copy of the Member properties.
+func (m Member) Properties() []Property { return m.properties.Copy() }
+
+// String encodes Member into a string compliant with the W3C Baggage
+// specification.
+func (m Member) String() string {
+	// A key is just an ASCII string, but a value is URL encoded UTF-8.
+	s := fmt.Sprintf("%s%s%s", m.key, keyValueDelimiter, url.QueryEscape(m.value))
+	if len(m.properties) > 0 {
+		s = fmt.Sprintf("%s%s%s", s, propertyDelimiter, m.properties.String())
+	}
+	return s
+}
+
+// Baggage is a list of baggage members representing the baggage-string as
+// defined by the W3C Baggage specification.
+type Baggage struct { //nolint:golint
+	list baggage.List
+}
+
+// New returns a new valid Baggage. It returns an error if the passed members
+// are invalid according to the W3C Baggage specification or if it results in
+// a Baggage exceeding limits set in that specification.
+func New(members ...Member) (Baggage, error) {
+	if len(members) == 0 {
+		return Baggage{}, nil
+	}
+
+	b := make(baggage.List)
+	for _, m := range members {
+		if err := m.validate(); err != nil {
+			return Baggage{}, err
+		}
+		// OpenTelemetry resolves duplicates by last-one-wins.
+		b[m.key] = baggage.Item{
+			Value:      m.value,
+			Properties: m.properties.asInternal(),
+		}
+	}
+
+	// Check member numbers after deduplicating.
+	if len(b) > maxMembers {
+		return Baggage{}, errMemberNumber
+	}
+
+	bag := Baggage{b}
+	if n := len(bag.String()); n > maxBytesPerBaggageString {
+		return Baggage{}, fmt.Errorf("%w: %d", errBaggageBytes, n)
+	}
+
+	return bag, nil
+}
+
+// Parse attempts to decode a baggage-string from the passed string. It
+// returns an error if the input is invalid according to the W3C Baggage
+// specification.
+//
+// If there are duplicate list-members contained in baggage, the last one
+// defined (reading left-to-right) will be the only one kept. This diverges
+// from the W3C Baggage specification which allows duplicate list-members, but
+// conforms to the OpenTelemetry Baggage specification.
+func Parse(bStr string) (Baggage, error) {
+	if bStr == "" {
+		return Baggage{}, nil
+	}
+
+	if n := len(bStr); n > maxBytesPerBaggageString {
+		return Baggage{}, fmt.Errorf("%w: %d", errBaggageBytes, n)
+	}
+
+	b := make(baggage.List)
+	for _, memberStr := range strings.Split(bStr, listDelimiter) {
+		m, err := parseMember(memberStr)
+		if err != nil {
+			return Baggage{}, err
+		}
+		// OpenTelemetry resolves duplicates by last-one-wins.
+		b[m.key] = baggage.Item{
+			Value:      m.value,
+			Properties: m.properties.asInternal(),
+		}
+	}
+
+	// OpenTelemetry does not allow for duplicate list-members, but the W3C
+	// specification does. Now that we have deduplicated, ensure the baggage
+	// does not exceed list-member limits.
+	if len(b) > maxMembers {
+		return Baggage{}, errMemberNumber
+	}
+
+	return Baggage{b}, nil
+}
+
+// Member returns the baggage list-member identified by key.
+//
+// If there is no list-member matching the passed key the returned Member will
+// be a zero-value Member.
+func (b Baggage) Member(key string) Member {
+	v, ok := b.list[key]
+	if !ok {
+		// We do not need to worry about distiguising between the situation
+		// where a zero-valued Member is included in the Baggage because a
+		// zero-valued Member is invalid according to the W3C Baggage
+		// specification (it has an empty key).
+		return Member{}
+	}
+
+	return Member{
+		key:        key,
+		value:      v.Value,
+		properties: fromInternalProperties(v.Properties),
+	}
+}
+
+// Members returns all the baggage list-members.
+// The order of the returned list-members does not have significance.
+func (b Baggage) Members() []Member {
+	if len(b.list) == 0 {
+		return nil
+	}
+
+	members := make([]Member, 0, len(b.list))
+	for k, v := range b.list {
+		members = append(members, Member{
+			key:        k,
+			value:      v.Value,
+			properties: fromInternalProperties(v.Properties),
+		})
+	}
+	return members
+}
+
+// SetMember returns a copy the Baggage with the member included. If the
+// baggage contains a Member with the same key the existing Member is
+// replaced.
+//
+// If member is invalid according to the W3C Baggage specification, an error
+// is returned with the original Baggage.
+func (b Baggage) SetMember(member Member) (Baggage, error) {
+	if err := member.validate(); err != nil {
+		return b, fmt.Errorf("%w: %s", errInvalidMember, err)
+	}
+
+	n := len(b.list)
+	if _, ok := b.list[member.key]; !ok {
+		n++
+	}
+	list := make(baggage.List, n)
+
+	for k, v := range b.list {
+		// Do not copy if we are just going to overwrite.
+		if k == member.key {
+			continue
+		}
+		list[k] = v
+	}
+
+	list[member.key] = baggage.Item{
+		Value:      member.value,
+		Properties: member.properties.asInternal(),
+	}
+
+	return Baggage{list: list}, nil
+}
+
+// DeleteMember returns a copy of the Baggage with the list-member identified
+// by key removed.
+func (b Baggage) DeleteMember(key string) Baggage {
+	n := len(b.list)
+	if _, ok := b.list[key]; ok {
+		n--
+	}
+	list := make(baggage.List, n)
+
+	for k, v := range b.list {
+		if k == key {
+			continue
+		}
+		list[k] = v
+	}
+
+	return Baggage{list: list}
+}
+
+// Len returns the number of list-members in the Baggage.
+func (b Baggage) Len() int {
+	return len(b.list)
+}
+
+// String encodes Baggage into a string compliant with the W3C Baggage
+// specification. The returned string will be invalid if the Baggage contains
+// any invalid list-members.
+func (b Baggage) String() string {
+	members := make([]string, 0, len(b.list))
+	for k, v := range b.list {
+		members = append(members, Member{
+			key:        k,
+			value:      v.Value,
+			properties: fromInternalProperties(v.Properties),
+		}.String())
+	}
+	return strings.Join(members, listDelimiter)
+}
diff --git a/vendor/go.opentelemetry.io/otel/baggage/context.go b/vendor/go.opentelemetry.io/otel/baggage/context.go
new file mode 100644
index 000000000..24b34b756
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/baggage/context.go
@@ -0,0 +1,39 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package baggage // import "go.opentelemetry.io/otel/baggage"
+
+import (
+	"context"
+
+	"go.opentelemetry.io/otel/internal/baggage"
+)
+
+// ContextWithBaggage returns a copy of parent with baggage.
+func ContextWithBaggage(parent context.Context, b Baggage) context.Context {
+	// Delegate so any hooks for the OpenTracing bridge are handled.
+	return baggage.ContextWithList(parent, b.list)
+}
+
+// ContextWithoutBaggage returns a copy of parent with no baggage.
+func ContextWithoutBaggage(parent context.Context) context.Context {
+	// Delegate so any hooks for the OpenTracing bridge are handled.
+	return baggage.ContextWithList(parent, nil)
+}
+
+// FromContext returns the baggage contained in ctx.
+func FromContext(ctx context.Context) Baggage {
+	// Delegate so any hooks for the OpenTracing bridge are handled.
+	return Baggage{list: baggage.ListFromContext(ctx)}
+}
diff --git a/vendor/go.opentelemetry.io/otel/baggage/doc.go b/vendor/go.opentelemetry.io/otel/baggage/doc.go
new file mode 100644
index 000000000..188e53f40
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/baggage/doc.go
@@ -0,0 +1,23 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+/*
+Package baggage provides functionality for storing and retrieving
+baggage items in Go context. For propagating the baggage, see the
+go.opentelemetry.io/otel/propagation package.
+
+This package is currently in a Release Candidate phase. Backwards incompatible changes
+may be introduced prior to v1.0.0, but we believe the current API is ready to stabilize.
+*/
+package baggage // import "go.opentelemetry.io/otel/baggage"
diff --git a/vendor/go.opentelemetry.io/otel/codes/codes.go b/vendor/go.opentelemetry.io/otel/codes/codes.go
new file mode 100644
index 000000000..064a9279f
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/codes/codes.go
@@ -0,0 +1,106 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package codes // import "go.opentelemetry.io/otel/codes"
+
+import (
+	"encoding/json"
+	"fmt"
+	"strconv"
+)
+
+const (
+	// Unset is the default status code.
+	Unset Code = 0
+	// Error indicates the operation contains an error.
+	Error Code = 1
+	// Ok indicates operation has been validated by an Application developers
+	// or Operator to have completed successfully, or contain no error.
+	Ok Code = 2
+
+	maxCode = 3
+)
+
+// Code is an 32-bit representation of a status state.
+type Code uint32
+
+var codeToStr = map[Code]string{
+	Unset: "Unset",
+	Error: "Error",
+	Ok:    "Ok",
+}
+
+var strToCode = map[string]Code{
+	`"Unset"`: Unset,
+	`"Error"`: Error,
+	`"Ok"`:    Ok,
+}
+
+// String returns the Code as a string.
+func (c Code) String() string {
+	return codeToStr[c]
+}
+
+// UnmarshalJSON unmarshals b into the Code.
+//
+// This is based on the functionality in the gRPC codes package:
+// https://github.com/grpc/grpc-go/blob/bb64fee312b46ebee26be43364a7a966033521b1/codes/codes.go#L218-L244
+func (c *Code) UnmarshalJSON(b []byte) error {
+	// From json.Unmarshaler: By convention, to approximate the behavior of
+	// Unmarshal itself, Unmarshalers implement UnmarshalJSON([]byte("null")) as
+	// a no-op.
+	if string(b) == "null" {
+		return nil
+	}
+	if c == nil {
+		return fmt.Errorf("nil receiver passed to UnmarshalJSON")
+	}
+
+	var x interface{}
+	if err := json.Unmarshal(b, &x); err != nil {
+		return err
+	}
+	switch x.(type) {
+	case string:
+		if jc, ok := strToCode[string(b)]; ok {
+			*c = jc
+			return nil
+		}
+		return fmt.Errorf("invalid code: %q", string(b))
+	case float64:
+		if ci, err := strconv.ParseUint(string(b), 10, 32); err == nil {
+			if ci >= maxCode {
+				return fmt.Errorf("invalid code: %q", ci)
+			}
+
+			*c = Code(ci)
+			return nil
+		}
+		return fmt.Errorf("invalid code: %q", string(b))
+	default:
+		return fmt.Errorf("invalid code: %q", string(b))
+	}
+}
+
+// MarshalJSON returns c as the JSON encoding of c.
+func (c *Code) MarshalJSON() ([]byte, error) {
+	if c == nil {
+		return []byte("null"), nil
+	}
+	str, ok := codeToStr[*c]
+	if !ok {
+		return nil, fmt.Errorf("invalid code: %d", *c)
+	}
+	return []byte(fmt.Sprintf("%q", str)), nil
+}
diff --git a/vendor/go.opentelemetry.io/otel/codes/doc.go b/vendor/go.opentelemetry.io/otel/codes/doc.go
new file mode 100644
index 000000000..7b60f983c
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/codes/doc.go
@@ -0,0 +1,24 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+/*
+Package codes defines the canonical error codes used by OpenTelemetry.
+
+This package is currently in a Release Candidate phase. Backwards incompatible changes
+may be introduced prior to v1.0.0, but we believe the current API is ready to stabilize.
+
+It conforms to [the OpenTelemetry
+specification](https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/trace/api.md#statuscanonicalcode).
+*/
+package codes // import "go.opentelemetry.io/otel/codes"
diff --git a/vendor/go.opentelemetry.io/otel/doc.go b/vendor/go.opentelemetry.io/otel/doc.go
new file mode 100644
index 000000000..484749420
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/doc.go
@@ -0,0 +1,37 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+/*
+Package otel provides global access to the OpenTelemetry API. The subpackages of
+the otel package provide an implementation of the OpenTelemetry API.
+
+This package is currently in a Release Candidate phase. Backwards incompatible changes
+may be introduced prior to v1.0.0, but we believe the current API is ready to stabilize.
+
+The provided API is used to instrument code and measure data about that code's
+performance and operation. The measured data, by default, is not processed or
+transmitted anywhere. An implementation of the OpenTelemetry SDK, like the
+default SDK implementation (go.opentelemetry.io/otel/sdk), and associated
+exporters are used to process and transport this data.
+
+To read the getting started guide, see https://opentelemetry.io/docs/go/getting-started/.
+
+To read more about tracing, see go.opentelemetry.io/otel/trace.
+
+To read more about metrics, see go.opentelemetry.io/otel/metric.
+
+To read more about propagation, see go.opentelemetry.io/otel/propagation and
+go.opentelemetry.io/otel/baggage.
+*/
+package otel // import "go.opentelemetry.io/otel"
diff --git a/vendor/go.opentelemetry.io/otel/error_handler.go b/vendor/go.opentelemetry.io/otel/error_handler.go
new file mode 100644
index 000000000..a51b2dee4
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/error_handler.go
@@ -0,0 +1,27 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package otel // import "go.opentelemetry.io/otel"
+
+// ErrorHandler handles irremediable events.
+type ErrorHandler interface {
+	// DO NOT CHANGE: any modification will not be backwards compatible and
+	// must never be done outside of a new major release.
+
+	// Handle handles any error deemed irremediable by an OpenTelemetry
+	// component.
+	Handle(error)
+	// DO NOT CHANGE: any modification will not be backwards compatible and
+	// must never be done outside of a new major release.
+}
diff --git a/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/LICENSE b/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/LICENSE
new file mode 100644
index 000000000..261eeb9e9
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/LICENSE
@@ -0,0 +1,201 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
diff --git a/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/clients.go b/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/clients.go
new file mode 100644
index 000000000..dbb40cf58
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/clients.go
@@ -0,0 +1,54 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package otlptrace // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace"
+
+import (
+	"context"
+
+	tracepb "go.opentelemetry.io/proto/otlp/trace/v1"
+)
+
+// Client manages connections to the collector, handles the
+// transformation of data into wire format, and the transmission of that
+// data to the collector.
+type Client interface {
+	// DO NOT CHANGE: any modification will not be backwards compatible and
+	// must never be done outside of a new major release.
+
+	// Start should establish connection(s) to endpoint(s). It is
+	// called just once by the exporter, so the implementation
+	// does not need to worry about idempotence and locking.
+	Start(ctx context.Context) error
+	// DO NOT CHANGE: any modification will not be backwards compatible and
+	// must never be done outside of a new major release.
+
+	// Stop should close the connections. The function is called
+	// only once by the exporter, so the implementation does not
+	// need to worry about idempotence, but it may be called
+	// concurrently with UploadTraces, so proper
+	// locking is required. The function serves as a
+	// synchronization point - after the function returns, the
+	// process of closing connections is assumed to be finished.
+	Stop(ctx context.Context) error
+	// DO NOT CHANGE: any modification will not be backwards compatible and
+	// must never be done outside of a new major release.
+
+	// UploadTraces should transform the passed traces to the wire
+	// format and send it to the collector. May be called
+	// concurrently.
+	UploadTraces(ctx context.Context, protoSpans []*tracepb.ResourceSpans) error
+	// DO NOT CHANGE: any modification will not be backwards compatible and
+	// must never be done outside of a new major release.
+}
diff --git a/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/exporter.go b/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/exporter.go
new file mode 100644
index 000000000..d795db912
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/exporter.go
@@ -0,0 +1,103 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package otlptrace // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace"
+
+import (
+	"context"
+	"errors"
+	"sync"
+
+	"go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/tracetransform"
+
+	tracesdk "go.opentelemetry.io/otel/sdk/trace"
+)
+
+var (
+	errAlreadyStarted = errors.New("already started")
+)
+
+// Exporter exports trace data in the OTLP wire format.
+type Exporter struct {
+	client Client
+
+	mu      sync.RWMutex
+	started bool
+
+	startOnce sync.Once
+	stopOnce  sync.Once
+}
+
+// ExportSpans exports a batch of spans.
+func (e *Exporter) ExportSpans(ctx context.Context, ss []tracesdk.ReadOnlySpan) error {
+	protoSpans := tracetransform.Spans(ss)
+	if len(protoSpans) == 0 {
+		return nil
+	}
+
+	return e.client.UploadTraces(ctx, protoSpans)
+}
+
+// Start establishes a connection to the receiving endpoint.
+func (e *Exporter) Start(ctx context.Context) error {
+	var err = errAlreadyStarted
+	e.startOnce.Do(func() {
+		e.mu.Lock()
+		e.started = true
+		e.mu.Unlock()
+		err = e.client.Start(ctx)
+	})
+
+	return err
+}
+
+// Shutdown flushes all exports and closes all connections to the receiving endpoint.
+func (e *Exporter) Shutdown(ctx context.Context) error {
+	e.mu.RLock()
+	started := e.started
+	e.mu.RUnlock()
+
+	if !started {
+		return nil
+	}
+
+	var err error
+
+	e.stopOnce.Do(func() {
+		err = e.client.Stop(ctx)
+		e.mu.Lock()
+		e.started = false
+		e.mu.Unlock()
+	})
+
+	return err
+}
+
+var _ tracesdk.SpanExporter = (*Exporter)(nil)
+
+// New constructs a new Exporter and starts it.
+func New(ctx context.Context, client Client) (*Exporter, error) {
+	exp := NewUnstarted(client)
+	if err := exp.Start(ctx); err != nil {
+		return nil, err
+	}
+	return exp, nil
+}
+
+// NewUnstarted constructs a new Exporter and does not start it.
+func NewUnstarted(client Client) *Exporter {
+	return &Exporter{
+		client: client,
+	}
+}
diff --git a/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/go.mod b/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/go.mod
new file mode 100644
index 000000000..26f2ef360
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/go.mod
@@ -0,0 +1,81 @@
+module go.opentelemetry.io/otel/exporters/otlp/otlptrace
+
+go 1.15
+
+require (
+	github.com/cenkalti/backoff/v4 v4.1.1
+	github.com/google/go-cmp v0.5.6
+	github.com/stretchr/testify v1.7.0
+	go.opentelemetry.io/otel v1.0.0-RC1
+	go.opentelemetry.io/otel/oteltest v1.0.0-RC1
+	go.opentelemetry.io/otel/sdk v1.0.0-RC1
+	go.opentelemetry.io/otel/trace v1.0.0-RC1
+	go.opentelemetry.io/proto/otlp v0.9.0
+	google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013
+	google.golang.org/grpc v1.38.0
+	google.golang.org/protobuf v1.26.0
+)
+
+replace go.opentelemetry.io/otel => ../../..
+
+replace go.opentelemetry.io/otel/sdk => ../../../sdk
+
+replace go.opentelemetry.io/otel/metric => ../../../metric
+
+replace go.opentelemetry.io/otel/oteltest => ../../../oteltest
+
+replace go.opentelemetry.io/otel/trace => ../../../trace
+
+replace go.opentelemetry.io/otel/bridge/opencensus => ../../../bridge/opencensus
+
+replace go.opentelemetry.io/otel/bridge/opentracing => ../../../bridge/opentracing
+
+replace go.opentelemetry.io/otel/example/jaeger => ../../../example/jaeger
+
+replace go.opentelemetry.io/otel/example/namedtracer => ../../../example/namedtracer
+
+replace go.opentelemetry.io/otel/example/opencensus => ../../../example/opencensus
+
+replace go.opentelemetry.io/otel/example/otel-collector => ../../../example/otel-collector
+
+replace go.opentelemetry.io/otel/example/prom-collector => ../../../example/prom-collector
+
+replace go.opentelemetry.io/otel/example/prometheus => ../../../example/prometheus
+
+replace go.opentelemetry.io/otel/example/zipkin => ../../../example/zipkin
+
+replace go.opentelemetry.io/otel/exporters/prometheus => ../../prometheus
+
+replace go.opentelemetry.io/otel/exporters/otlp/otlptrace => ./
+
+replace go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc => ./otlptracegrpc
+
+replace go.opentelemetry.io/otel/exporters/jaeger => ../../jaeger
+
+replace go.opentelemetry.io/otel/exporters/zipkin => ../../zipkin
+
+replace go.opentelemetry.io/otel/internal/tools => ../../../internal/tools
+
+replace go.opentelemetry.io/otel/sdk/export/metric => ../../../sdk/export/metric
+
+replace go.opentelemetry.io/otel/sdk/metric => ../../../sdk/metric
+
+replace go.opentelemetry.io/otel/example/passthrough => ../../../example/passthrough
+
+replace go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp => ./otlptracehttp
+
+replace go.opentelemetry.io/otel/internal/metric => ../../../internal/metric
+
+replace go.opentelemetry.io/otel/exporters/metric/prometheus => ../../metric/prometheus
+
+replace go.opentelemetry.io/otel/exporters/trace/jaeger => ../../trace/jaeger
+
+replace go.opentelemetry.io/otel/exporters/trace/zipkin => ../../trace/zipkin
+
+replace go.opentelemetry.io/otel/exporters/otlp/otlpmetric => ../otlpmetric
+
+replace go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc => ../otlpmetric/otlpmetricgrpc
+
+replace go.opentelemetry.io/otel/exporters/stdout/stdoutmetric => ../../stdout/stdoutmetric
+
+replace go.opentelemetry.io/otel/exporters/stdout/stdouttrace => ../../stdout/stdouttrace
diff --git a/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/go.sum b/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/go.sum
new file mode 100644
index 000000000..a40bb40cf
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/go.sum
@@ -0,0 +1,123 @@
+cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
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diff --git a/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/connection/connection.go b/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/connection/connection.go
new file mode 100644
index 000000000..0c6f89fa4
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/connection/connection.go
@@ -0,0 +1,429 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package connection
+
+import (
+	"context"
+	"fmt"
+	"math/rand"
+	"sync"
+	"sync/atomic"
+	"time"
+	"unsafe"
+
+	"github.com/cenkalti/backoff/v4"
+	"google.golang.org/genproto/googleapis/rpc/errdetails"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
+
+	"google.golang.org/grpc/encoding/gzip"
+
+	"go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/otlpconfig"
+
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/metadata"
+)
+
+type Connection struct {
+	// Ensure pointer is 64-bit aligned for atomic operations on both 32 and 64 bit machines.
+	lastConnectErrPtr unsafe.Pointer
+
+	// mu protects the Connection as it is accessed by the
+	// exporter goroutines and background Connection goroutine
+	mu sync.Mutex
+	cc *grpc.ClientConn
+
+	// these fields are read-only after constructor is finished
+	cfg                  otlpconfig.Config
+	SCfg                 otlpconfig.SignalConfig
+	metadata             metadata.MD
+	newConnectionHandler func(cc *grpc.ClientConn)
+
+	// these channels are created once
+	disconnectedCh             chan bool
+	backgroundConnectionDoneCh chan struct{}
+	stopCh                     chan struct{}
+
+	// this is for tests, so they can replace the closing
+	// routine without a worry of modifying some global variable
+	// or changing it back to original after the test is done
+	closeBackgroundConnectionDoneCh func(ch chan struct{})
+}
+
+func NewConnection(cfg otlpconfig.Config, sCfg otlpconfig.SignalConfig, handler func(cc *grpc.ClientConn)) *Connection {
+	c := new(Connection)
+	c.newConnectionHandler = handler
+	c.cfg = cfg
+	c.SCfg = sCfg
+	if len(c.SCfg.Headers) > 0 {
+		c.metadata = metadata.New(c.SCfg.Headers)
+	}
+	c.closeBackgroundConnectionDoneCh = func(ch chan struct{}) {
+		close(ch)
+	}
+	return c
+}
+
+func (c *Connection) StartConnection(ctx context.Context) error {
+	c.stopCh = make(chan struct{})
+	c.disconnectedCh = make(chan bool, 1)
+	c.backgroundConnectionDoneCh = make(chan struct{})
+
+	if err := c.connect(ctx); err == nil {
+		c.setStateConnected()
+	} else {
+		c.SetStateDisconnected(err)
+	}
+	go c.indefiniteBackgroundConnection()
+
+	// TODO: proper error handling when initializing connections.
+	// We can report permanent errors, e.g., invalid settings.
+	return nil
+}
+
+func (c *Connection) LastConnectError() error {
+	errPtr := (*error)(atomic.LoadPointer(&c.lastConnectErrPtr))
+	if errPtr == nil {
+		return nil
+	}
+	return *errPtr
+}
+
+func (c *Connection) saveLastConnectError(err error) {
+	var errPtr *error
+	if err != nil {
+		errPtr = &err
+	}
+	atomic.StorePointer(&c.lastConnectErrPtr, unsafe.Pointer(errPtr))
+}
+
+func (c *Connection) SetStateDisconnected(err error) {
+	c.saveLastConnectError(err)
+	select {
+	case c.disconnectedCh <- true:
+	default:
+	}
+	c.newConnectionHandler(nil)
+}
+
+func (c *Connection) setStateConnected() {
+	c.saveLastConnectError(nil)
+}
+
+func (c *Connection) Connected() bool {
+	return c.LastConnectError() == nil
+}
+
+const defaultConnReattemptPeriod = 10 * time.Second
+
+func (c *Connection) indefiniteBackgroundConnection() {
+	defer func() {
+		c.closeBackgroundConnectionDoneCh(c.backgroundConnectionDoneCh)
+	}()
+
+	connReattemptPeriod := c.cfg.ReconnectionPeriod
+	if connReattemptPeriod <= 0 {
+		connReattemptPeriod = defaultConnReattemptPeriod
+	}
+
+	// No strong seeding required, nano time can
+	// already help with pseudo uniqueness.
+	rng := rand.New(rand.NewSource(time.Now().UnixNano() + rand.Int63n(1024)))
+
+	// maxJitterNanos: 70% of the connectionReattemptPeriod
+	maxJitterNanos := int64(0.7 * float64(connReattemptPeriod))
+
+	for {
+		// Otherwise these will be the normal scenarios to enable
+		// reconnection if we trip out.
+		// 1. If we've stopped, return entirely
+		// 2. Otherwise block until we are disconnected, and
+		//    then retry connecting
+		select {
+		case <-c.stopCh:
+			return
+
+		case <-c.disconnectedCh:
+			// Quickly check if we haven't stopped at the
+			// same time.
+			select {
+			case <-c.stopCh:
+				return
+
+			default:
+			}
+
+			// Normal scenario that we'll wait for
+		}
+
+		if err := c.connect(context.Background()); err == nil {
+			c.setStateConnected()
+		} else {
+			// this code is unreachable in most cases
+			// c.connect does not establish Connection
+			c.SetStateDisconnected(err)
+		}
+
+		// Apply some jitter to avoid lockstep retrials of other
+		// collector-exporters. Lockstep retrials could result in an
+		// innocent DDOS, by clogging the machine's resources and network.
+		jitter := time.Duration(rng.Int63n(maxJitterNanos))
+		select {
+		case <-c.stopCh:
+			return
+		case <-time.After(connReattemptPeriod + jitter):
+		}
+	}
+}
+
+func (c *Connection) connect(ctx context.Context) error {
+	cc, err := c.dialToCollector(ctx)
+	if err != nil {
+		return err
+	}
+	c.setConnection(cc)
+	c.newConnectionHandler(cc)
+	return nil
+}
+
+// setConnection sets cc as the client Connection and returns true if
+// the Connection state changed.
+func (c *Connection) setConnection(cc *grpc.ClientConn) bool {
+	c.mu.Lock()
+	defer c.mu.Unlock()
+
+	// If previous clientConn is same as the current then just return.
+	// This doesn't happen right now as this func is only called with new ClientConn.
+	// It is more about future-proofing.
+	if c.cc == cc {
+		return false
+	}
+
+	// If the previous clientConn was non-nil, close it
+	if c.cc != nil {
+		_ = c.cc.Close()
+	}
+	c.cc = cc
+	return true
+}
+
+func (c *Connection) dialToCollector(ctx context.Context) (*grpc.ClientConn, error) {
+	dialOpts := []grpc.DialOption{}
+	if c.cfg.ServiceConfig != "" {
+		dialOpts = append(dialOpts, grpc.WithDefaultServiceConfig(c.cfg.ServiceConfig))
+	}
+	if c.SCfg.GRPCCredentials != nil {
+		dialOpts = append(dialOpts, grpc.WithTransportCredentials(c.SCfg.GRPCCredentials))
+	} else if c.SCfg.Insecure {
+		dialOpts = append(dialOpts, grpc.WithInsecure())
+	}
+	if c.SCfg.Compression == otlpconfig.GzipCompression {
+		dialOpts = append(dialOpts, grpc.WithDefaultCallOptions(grpc.UseCompressor(gzip.Name)))
+	}
+	if len(c.cfg.DialOptions) != 0 {
+		dialOpts = append(dialOpts, c.cfg.DialOptions...)
+	}
+
+	ctx, cancel := c.ContextWithStop(ctx)
+	defer cancel()
+	ctx = c.ContextWithMetadata(ctx)
+	return grpc.DialContext(ctx, c.SCfg.Endpoint, dialOpts...)
+}
+
+func (c *Connection) ContextWithMetadata(ctx context.Context) context.Context {
+	if c.metadata.Len() > 0 {
+		return metadata.NewOutgoingContext(ctx, c.metadata)
+	}
+	return ctx
+}
+
+func (c *Connection) Shutdown(ctx context.Context) error {
+	close(c.stopCh)
+	// Ensure that the backgroundConnector returns
+	select {
+	case <-c.backgroundConnectionDoneCh:
+	case <-ctx.Done():
+		return ctx.Err()
+	}
+
+	c.mu.Lock()
+	cc := c.cc
+	c.cc = nil
+	c.mu.Unlock()
+
+	if cc != nil {
+		return cc.Close()
+	}
+
+	return nil
+}
+
+func (c *Connection) ContextWithStop(ctx context.Context) (context.Context, context.CancelFunc) {
+	// Unify the parent context Done signal with the Connection's
+	// stop channel.
+	ctx, cancel := context.WithCancel(ctx)
+	go func(ctx context.Context, cancel context.CancelFunc) {
+		select {
+		case <-ctx.Done():
+			// Nothing to do, either cancelled or deadline
+			// happened.
+		case <-c.stopCh:
+			cancel()
+		}
+	}(ctx, cancel)
+	return ctx, cancel
+}
+
+func (c *Connection) DoRequest(ctx context.Context, fn func(context.Context) error) error {
+	expBackoff := newExponentialBackoff(c.cfg.RetrySettings)
+
+	for {
+		err := fn(ctx)
+		if err == nil {
+			// request succeeded.
+			return nil
+		}
+
+		if !c.cfg.RetrySettings.Enabled {
+			return err
+		}
+
+		// We have an error, check gRPC status code.
+		st := status.Convert(err)
+		if st.Code() == codes.OK {
+			// Not really an error, still success.
+			return nil
+		}
+
+		// Now, this is this a real error.
+
+		if !shouldRetry(st.Code()) {
+			// It is not a retryable error, we should not retry.
+			return err
+		}
+
+		// Need to retry.
+
+		throttle := getThrottleDuration(st)
+
+		backoffDelay := expBackoff.NextBackOff()
+		if backoffDelay == backoff.Stop {
+			// throw away the batch
+			err = fmt.Errorf("max elapsed time expired: %w", err)
+			return err
+		}
+
+		var delay time.Duration
+
+		if backoffDelay > throttle {
+			delay = backoffDelay
+		} else {
+			if expBackoff.GetElapsedTime()+throttle > expBackoff.MaxElapsedTime {
+				err = fmt.Errorf("max elapsed time expired when respecting server throttle: %w", err)
+				return err
+			}
+
+			// Respect server throttling.
+			delay = throttle
+		}
+
+		// back-off, but get interrupted when shutting down or request is cancelled or timed out.
+		err = func() error {
+			dt := time.NewTimer(delay)
+			defer dt.Stop()
+
+			select {
+			case <-ctx.Done():
+				return ctx.Err()
+			case <-c.stopCh:
+				return fmt.Errorf("interrupted due to shutdown: %w", err)
+			case <-dt.C:
+			}
+
+			return nil
+		}()
+
+		if err != nil {
+			return err
+		}
+
+	}
+}
+
+func shouldRetry(code codes.Code) bool {
+	switch code {
+	case codes.OK:
+		// Success. This function should not be called for this code, the best we
+		// can do is tell the caller not to retry.
+		return false
+
+	case codes.Canceled,
+		codes.DeadlineExceeded,
+		codes.ResourceExhausted,
+		codes.Aborted,
+		codes.OutOfRange,
+		codes.Unavailable,
+		codes.DataLoss:
+		// These are retryable errors.
+		return true
+
+	case codes.Unknown,
+		codes.InvalidArgument,
+		codes.Unauthenticated,
+		codes.PermissionDenied,
+		codes.NotFound,
+		codes.AlreadyExists,
+		codes.FailedPrecondition,
+		codes.Unimplemented,
+		codes.Internal:
+		// These are fatal errors, don't retry.
+		return false
+
+	default:
+		// Don't retry on unknown codes.
+		return false
+	}
+}
+
+func getThrottleDuration(status *status.Status) time.Duration {
+	// See if throttling information is available.
+	for _, detail := range status.Details() {
+		if t, ok := detail.(*errdetails.RetryInfo); ok {
+			if t.RetryDelay.Seconds > 0 || t.RetryDelay.Nanos > 0 {
+				// We are throttled. Wait before retrying as requested by the server.
+				return time.Duration(t.RetryDelay.Seconds)*time.Second + time.Duration(t.RetryDelay.Nanos)*time.Nanosecond
+			}
+			return 0
+		}
+	}
+	return 0
+}
+
+func newExponentialBackoff(rs otlpconfig.RetrySettings) *backoff.ExponentialBackOff {
+	// Do not use NewExponentialBackOff since it calls Reset and the code here must
+	// call Reset after changing the InitialInterval (this saves an unnecessary call to Now).
+	expBackoff := &backoff.ExponentialBackOff{
+		InitialInterval:     rs.InitialInterval,
+		RandomizationFactor: backoff.DefaultRandomizationFactor,
+		Multiplier:          backoff.DefaultMultiplier,
+		MaxInterval:         rs.MaxInterval,
+		MaxElapsedTime:      rs.MaxElapsedTime,
+		Stop:                backoff.Stop,
+		Clock:               backoff.SystemClock,
+	}
+	expBackoff.Reset()
+
+	return expBackoff
+}
diff --git a/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/otlpconfig/envconfig.go b/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/otlpconfig/envconfig.go
new file mode 100644
index 000000000..942d57596
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/otlpconfig/envconfig.go
@@ -0,0 +1,195 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package otlpconfig
+
+import (
+	"crypto/tls"
+	"fmt"
+	"io/ioutil"
+	"net/url"
+	"os"
+	"regexp"
+	"strconv"
+	"strings"
+	"time"
+
+	"go.opentelemetry.io/otel"
+)
+
+var httpSchemeRegexp = regexp.MustCompile(`(?i)^(http://|https://)`)
+
+func ApplyGRPCEnvConfigs(cfg *Config) {
+	e := EnvOptionsReader{
+		GetEnv:   os.Getenv,
+		ReadFile: ioutil.ReadFile,
+	}
+
+	e.ApplyGRPCEnvConfigs(cfg)
+}
+
+func ApplyHTTPEnvConfigs(cfg *Config) {
+	e := EnvOptionsReader{
+		GetEnv:   os.Getenv,
+		ReadFile: ioutil.ReadFile,
+	}
+
+	e.ApplyHTTPEnvConfigs(cfg)
+}
+
+type EnvOptionsReader struct {
+	GetEnv   func(string) string
+	ReadFile func(filename string) ([]byte, error)
+}
+
+func (e *EnvOptionsReader) ApplyHTTPEnvConfigs(cfg *Config) {
+	opts := e.GetOptionsFromEnv()
+	for _, opt := range opts {
+		opt.ApplyHTTPOption(cfg)
+	}
+}
+
+func (e *EnvOptionsReader) ApplyGRPCEnvConfigs(cfg *Config) {
+	opts := e.GetOptionsFromEnv()
+	for _, opt := range opts {
+		opt.ApplyGRPCOption(cfg)
+	}
+}
+
+func (e *EnvOptionsReader) GetOptionsFromEnv() []GenericOption {
+	var opts []GenericOption
+
+	// Endpoint
+	if v, ok := e.getEnvValue("ENDPOINT"); ok {
+		if isInsecureEndpoint(v) {
+			opts = append(opts, WithInsecure())
+		} else {
+			opts = append(opts, WithSecure())
+		}
+
+		opts = append(opts, WithEndpoint(trimSchema(v)))
+	}
+	if v, ok := e.getEnvValue("TRACES_ENDPOINT"); ok {
+		if isInsecureEndpoint(v) {
+			opts = append(opts, WithInsecure())
+		} else {
+			opts = append(opts, WithSecure())
+		}
+
+		opts = append(opts, WithEndpoint(trimSchema(v)))
+	}
+
+	// Certificate File
+	if path, ok := e.getEnvValue("CERTIFICATE"); ok {
+		if tls, err := e.readTLSConfig(path); err == nil {
+			opts = append(opts, WithTLSClientConfig(tls))
+		} else {
+			otel.Handle(fmt.Errorf("failed to configure otlp exporter certificate '%s': %w", path, err))
+		}
+	}
+	if path, ok := e.getEnvValue("TRACES_CERTIFICATE"); ok {
+		if tls, err := e.readTLSConfig(path); err == nil {
+			opts = append(opts, WithTLSClientConfig(tls))
+		} else {
+			otel.Handle(fmt.Errorf("failed to configure otlp traces exporter certificate '%s': %w", path, err))
+		}
+	}
+
+	// Headers
+	if h, ok := e.getEnvValue("HEADERS"); ok {
+		opts = append(opts, WithHeaders(stringToHeader(h)))
+	}
+	if h, ok := e.getEnvValue("TRACES_HEADERS"); ok {
+		opts = append(opts, WithHeaders(stringToHeader(h)))
+	}
+
+	// Compression
+	if c, ok := e.getEnvValue("COMPRESSION"); ok {
+		opts = append(opts, WithCompression(stringToCompression(c)))
+	}
+	if c, ok := e.getEnvValue("TRACES_COMPRESSION"); ok {
+		opts = append(opts, WithCompression(stringToCompression(c)))
+	}
+	// Timeout
+	if t, ok := e.getEnvValue("TIMEOUT"); ok {
+		if d, err := strconv.Atoi(t); err == nil {
+			opts = append(opts, WithTimeout(time.Duration(d)*time.Millisecond))
+		}
+	}
+	if t, ok := e.getEnvValue("TRACES_TIMEOUT"); ok {
+		if d, err := strconv.Atoi(t); err == nil {
+			opts = append(opts, WithTimeout(time.Duration(d)*time.Millisecond))
+		}
+	}
+
+	return opts
+}
+
+func isInsecureEndpoint(endpoint string) bool {
+	return strings.HasPrefix(strings.ToLower(endpoint), "http://") || strings.HasPrefix(strings.ToLower(endpoint), "unix://")
+}
+
+func trimSchema(endpoint string) string {
+	return httpSchemeRegexp.ReplaceAllString(endpoint, "")
+}
+
+// getEnvValue gets an OTLP environment variable value of the specified key using the GetEnv function.
+// This function already prepends the OTLP prefix to all key lookup.
+func (e *EnvOptionsReader) getEnvValue(key string) (string, bool) {
+	v := strings.TrimSpace(e.GetEnv(fmt.Sprintf("OTEL_EXPORTER_OTLP_%s", key)))
+	return v, v != ""
+}
+
+func (e *EnvOptionsReader) readTLSConfig(path string) (*tls.Config, error) {
+	b, err := e.ReadFile(path)
+	if err != nil {
+		return nil, err
+	}
+	return CreateTLSConfig(b)
+}
+
+func stringToCompression(value string) Compression {
+	switch value {
+	case "gzip":
+		return GzipCompression
+	}
+
+	return NoCompression
+}
+
+func stringToHeader(value string) map[string]string {
+	headersPairs := strings.Split(value, ",")
+	headers := make(map[string]string)
+
+	for _, header := range headersPairs {
+		nameValue := strings.SplitN(header, "=", 2)
+		if len(nameValue) < 2 {
+			continue
+		}
+		name, err := url.QueryUnescape(nameValue[0])
+		if err != nil {
+			continue
+		}
+		trimmedName := strings.TrimSpace(name)
+		value, err := url.QueryUnescape(nameValue[1])
+		if err != nil {
+			continue
+		}
+		trimmedValue := strings.TrimSpace(value)
+
+		headers[trimmedName] = trimmedValue
+	}
+
+	return headers
+}
diff --git a/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/otlpconfig/options.go b/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/otlpconfig/options.go
new file mode 100644
index 000000000..ef6a22bee
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/otlpconfig/options.go
@@ -0,0 +1,270 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package otlpconfig // import "go.opentelemetry.io/otel/exporters/otlp/internal/otlpconfig"
+
+import (
+	"crypto/tls"
+	"fmt"
+	"time"
+
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/credentials"
+)
+
+const (
+	// DefaultMaxAttempts describes how many times the driver
+	// should retry the sending of the payload in case of a
+	// retryable error.
+	DefaultMaxAttempts int = 5
+	// DefaultTracesPath is a default URL path for endpoint that
+	// receives spans.
+	DefaultTracesPath string = "/v1/traces"
+	// DefaultBackoff is a default base backoff time used in the
+	// exponential backoff strategy.
+	DefaultBackoff time.Duration = 300 * time.Millisecond
+	// DefaultTimeout is a default max waiting time for the backend to process
+	// each span batch.
+	DefaultTimeout time.Duration = 10 * time.Second
+)
+
+var (
+	// defaultRetrySettings is a default settings for the retry policy.
+	defaultRetrySettings = RetrySettings{
+		Enabled:         true,
+		InitialInterval: 5 * time.Second,
+		MaxInterval:     30 * time.Second,
+		MaxElapsedTime:  time.Minute,
+	}
+)
+
+type (
+	SignalConfig struct {
+		Endpoint    string
+		Insecure    bool
+		TLSCfg      *tls.Config
+		Headers     map[string]string
+		Compression Compression
+		Timeout     time.Duration
+		URLPath     string
+
+		// gRPC configurations
+		GRPCCredentials credentials.TransportCredentials
+	}
+
+	Config struct {
+		// Signal specific configurations
+		Traces SignalConfig
+
+		// HTTP configurations
+		MaxAttempts int
+		Backoff     time.Duration
+
+		// gRPC configurations
+		ReconnectionPeriod time.Duration
+		ServiceConfig      string
+		DialOptions        []grpc.DialOption
+		RetrySettings      RetrySettings
+	}
+)
+
+func NewDefaultConfig() Config {
+	c := Config{
+		Traces: SignalConfig{
+			Endpoint:    fmt.Sprintf("%s:%d", DefaultCollectorHost, DefaultCollectorPort),
+			URLPath:     DefaultTracesPath,
+			Compression: NoCompression,
+			Timeout:     DefaultTimeout,
+		},
+		MaxAttempts:   DefaultMaxAttempts,
+		Backoff:       DefaultBackoff,
+		RetrySettings: defaultRetrySettings,
+	}
+
+	return c
+}
+
+type (
+	// GenericOption applies an option to the HTTP or gRPC driver.
+	GenericOption interface {
+		ApplyHTTPOption(*Config)
+		ApplyGRPCOption(*Config)
+
+		// A private method to prevent users implementing the
+		// interface and so future additions to it will not
+		// violate compatibility.
+		private()
+	}
+
+	// HTTPOption applies an option to the HTTP driver.
+	HTTPOption interface {
+		ApplyHTTPOption(*Config)
+
+		// A private method to prevent users implementing the
+		// interface and so future additions to it will not
+		// violate compatibility.
+		private()
+	}
+
+	// GRPCOption applies an option to the gRPC driver.
+	GRPCOption interface {
+		ApplyGRPCOption(*Config)
+
+		// A private method to prevent users implementing the
+		// interface and so future additions to it will not
+		// violate compatibility.
+		private()
+	}
+)
+
+// genericOption is an option that applies the same logic
+// for both gRPC and HTTP.
+type genericOption struct {
+	fn func(*Config)
+}
+
+func (g *genericOption) ApplyGRPCOption(cfg *Config) {
+	g.fn(cfg)
+}
+
+func (g *genericOption) ApplyHTTPOption(cfg *Config) {
+	g.fn(cfg)
+}
+
+func (genericOption) private() {}
+
+func newGenericOption(fn func(cfg *Config)) GenericOption {
+	return &genericOption{fn: fn}
+}
+
+// splitOption is an option that applies different logics
+// for gRPC and HTTP.
+type splitOption struct {
+	httpFn func(*Config)
+	grpcFn func(*Config)
+}
+
+func (g *splitOption) ApplyGRPCOption(cfg *Config) {
+	g.grpcFn(cfg)
+}
+
+func (g *splitOption) ApplyHTTPOption(cfg *Config) {
+	g.httpFn(cfg)
+}
+
+func (splitOption) private() {}
+
+func newSplitOption(httpFn func(cfg *Config), grpcFn func(cfg *Config)) GenericOption {
+	return &splitOption{httpFn: httpFn, grpcFn: grpcFn}
+}
+
+// httpOption is an option that is only applied to the HTTP driver.
+type httpOption struct {
+	fn func(*Config)
+}
+
+func (h *httpOption) ApplyHTTPOption(cfg *Config) {
+	h.fn(cfg)
+}
+
+func (httpOption) private() {}
+
+func NewHTTPOption(fn func(cfg *Config)) HTTPOption {
+	return &httpOption{fn: fn}
+}
+
+// grpcOption is an option that is only applied to the gRPC driver.
+type grpcOption struct {
+	fn func(*Config)
+}
+
+func (h *grpcOption) ApplyGRPCOption(cfg *Config) {
+	h.fn(cfg)
+}
+
+func (grpcOption) private() {}
+
+func NewGRPCOption(fn func(cfg *Config)) GRPCOption {
+	return &grpcOption{fn: fn}
+}
+
+// Generic Options
+
+func WithEndpoint(endpoint string) GenericOption {
+	return newGenericOption(func(cfg *Config) {
+		cfg.Traces.Endpoint = endpoint
+	})
+}
+
+func WithCompression(compression Compression) GenericOption {
+	return newGenericOption(func(cfg *Config) {
+		cfg.Traces.Compression = compression
+	})
+}
+
+func WithURLPath(urlPath string) GenericOption {
+	return newGenericOption(func(cfg *Config) {
+		cfg.Traces.URLPath = urlPath
+	})
+}
+
+func WithRetry(settings RetrySettings) GenericOption {
+	return newGenericOption(func(cfg *Config) {
+		cfg.RetrySettings = settings
+	})
+}
+
+func WithTLSClientConfig(tlsCfg *tls.Config) GenericOption {
+	return newSplitOption(func(cfg *Config) {
+		cfg.Traces.TLSCfg = tlsCfg.Clone()
+	}, func(cfg *Config) {
+		cfg.Traces.GRPCCredentials = credentials.NewTLS(tlsCfg)
+	})
+}
+
+func WithInsecure() GenericOption {
+	return newGenericOption(func(cfg *Config) {
+		cfg.Traces.Insecure = true
+	})
+}
+
+func WithSecure() GenericOption {
+	return newGenericOption(func(cfg *Config) {
+		cfg.Traces.Insecure = false
+	})
+}
+
+func WithHeaders(headers map[string]string) GenericOption {
+	return newGenericOption(func(cfg *Config) {
+		cfg.Traces.Headers = headers
+	})
+}
+
+func WithTimeout(duration time.Duration) GenericOption {
+	return newGenericOption(func(cfg *Config) {
+		cfg.Traces.Timeout = duration
+	})
+}
+
+func WithMaxAttempts(maxAttempts int) GenericOption {
+	return newGenericOption(func(cfg *Config) {
+		cfg.MaxAttempts = maxAttempts
+	})
+}
+
+func WithBackoff(duration time.Duration) GenericOption {
+	return newGenericOption(func(cfg *Config) {
+		cfg.Backoff = duration
+	})
+}
diff --git a/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/otlpconfig/optiontypes.go b/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/otlpconfig/optiontypes.go
new file mode 100644
index 000000000..baec669cf
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/otlpconfig/optiontypes.go
@@ -0,0 +1,64 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package otlpconfig // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/otlpconfig"
+
+import "time"
+
+const (
+	// DefaultCollectorPort is the port the Exporter will attempt connect to
+	// if no collector port is provided.
+	DefaultCollectorPort uint16 = 4317
+	// DefaultCollectorHost is the host address the Exporter will attempt
+	// connect to if no collector address is provided.
+	DefaultCollectorHost string = "localhost"
+)
+
+// Compression describes the compression used for payloads sent to the
+// collector.
+type Compression int
+
+const (
+	// NoCompression tells the driver to send payloads without
+	// compression.
+	NoCompression Compression = iota
+	// GzipCompression tells the driver to send payloads after
+	// compressing them with gzip.
+	GzipCompression
+)
+
+// Marshaler describes the kind of message format sent to the collector
+type Marshaler int
+
+const (
+	// MarshalProto tells the driver to send using the protobuf binary format.
+	MarshalProto Marshaler = iota
+	// MarshalJSON tells the driver to send using json format.
+	MarshalJSON
+)
+
+// RetrySettings defines configuration for retrying batches in case of export failure
+// using an exponential backoff.
+type RetrySettings struct {
+	// Enabled indicates whether to not retry sending batches in case of export failure.
+	Enabled bool
+	// InitialInterval the time to wait after the first failure before retrying.
+	InitialInterval time.Duration
+	// MaxInterval is the upper bound on backoff interval. Once this value is reached the delay between
+	// consecutive retries will always be `MaxInterval`.
+	MaxInterval time.Duration
+	// MaxElapsedTime is the maximum amount of time (including retries) spent trying to send a request/batch.
+	// Once this value is reached, the data is discarded.
+	MaxElapsedTime time.Duration
+}
diff --git a/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/otlpconfig/tls.go b/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/otlpconfig/tls.go
new file mode 100644
index 000000000..19fdb2f6b
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/otlpconfig/tls.go
@@ -0,0 +1,34 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package otlpconfig
+
+import (
+	"crypto/tls"
+	"crypto/x509"
+	"errors"
+)
+
+// CreateTLSConfig creates a tls.Config from a raw certificate bytes
+// to verify a server certificate.
+func CreateTLSConfig(certBytes []byte) (*tls.Config, error) {
+	cp := x509.NewCertPool()
+	if ok := cp.AppendCertsFromPEM(certBytes); !ok {
+		return nil, errors.New("failed to append certificate to the cert pool")
+	}
+
+	return &tls.Config{
+		RootCAs: cp,
+	}, nil
+}
diff --git a/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/tracetransform/attribute.go b/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/tracetransform/attribute.go
new file mode 100644
index 000000000..2bf8ccecc
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/tracetransform/attribute.go
@@ -0,0 +1,141 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package tracetransform
+
+import (
+	"reflect"
+
+	"go.opentelemetry.io/otel/attribute"
+	commonpb "go.opentelemetry.io/proto/otlp/common/v1"
+
+	"go.opentelemetry.io/otel/sdk/resource"
+)
+
+// Attributes transforms a slice of KeyValues into a slice of OTLP attribute key-values.
+func Attributes(attrs []attribute.KeyValue) []*commonpb.KeyValue {
+	if len(attrs) == 0 {
+		return nil
+	}
+
+	out := make([]*commonpb.KeyValue, 0, len(attrs))
+	for _, kv := range attrs {
+		out = append(out, toAttribute(kv))
+	}
+	return out
+}
+
+// ResourceAttributes transforms a Resource into a slice of OTLP attribute key-values.
+func ResourceAttributes(resource *resource.Resource) []*commonpb.KeyValue {
+	if resource.Len() == 0 {
+		return nil
+	}
+
+	out := make([]*commonpb.KeyValue, 0, resource.Len())
+	for iter := resource.Iter(); iter.Next(); {
+		out = append(out, toAttribute(iter.Attribute()))
+	}
+
+	return out
+}
+
+func toAttribute(v attribute.KeyValue) *commonpb.KeyValue {
+	result := &commonpb.KeyValue{
+		Key:   string(v.Key),
+		Value: new(commonpb.AnyValue),
+	}
+	switch v.Value.Type() {
+	case attribute.BOOL:
+		result.Value.Value = &commonpb.AnyValue_BoolValue{
+			BoolValue: v.Value.AsBool(),
+		}
+	case attribute.INT64:
+		result.Value.Value = &commonpb.AnyValue_IntValue{
+			IntValue: v.Value.AsInt64(),
+		}
+	case attribute.FLOAT64:
+		result.Value.Value = &commonpb.AnyValue_DoubleValue{
+			DoubleValue: v.Value.AsFloat64(),
+		}
+	case attribute.STRING:
+		result.Value.Value = &commonpb.AnyValue_StringValue{
+			StringValue: v.Value.AsString(),
+		}
+	case attribute.ARRAY:
+		result.Value.Value = &commonpb.AnyValue_ArrayValue{
+			ArrayValue: &commonpb.ArrayValue{
+				Values: arrayValues(v),
+			},
+		}
+	default:
+		result.Value.Value = &commonpb.AnyValue_StringValue{
+			StringValue: "INVALID",
+		}
+	}
+	return result
+}
+
+func arrayValues(kv attribute.KeyValue) []*commonpb.AnyValue {
+	a := kv.Value.AsArray()
+	aType := reflect.TypeOf(a)
+	var valueFunc func(reflect.Value) *commonpb.AnyValue
+	switch aType.Elem().Kind() {
+	case reflect.Bool:
+		valueFunc = func(v reflect.Value) *commonpb.AnyValue {
+			return &commonpb.AnyValue{
+				Value: &commonpb.AnyValue_BoolValue{
+					BoolValue: v.Bool(),
+				},
+			}
+		}
+	case reflect.Int, reflect.Int64:
+		valueFunc = func(v reflect.Value) *commonpb.AnyValue {
+			return &commonpb.AnyValue{
+				Value: &commonpb.AnyValue_IntValue{
+					IntValue: v.Int(),
+				},
+			}
+		}
+	case reflect.Uintptr:
+		valueFunc = func(v reflect.Value) *commonpb.AnyValue {
+			return &commonpb.AnyValue{
+				Value: &commonpb.AnyValue_IntValue{
+					IntValue: int64(v.Uint()),
+				},
+			}
+		}
+	case reflect.Float64:
+		valueFunc = func(v reflect.Value) *commonpb.AnyValue {
+			return &commonpb.AnyValue{
+				Value: &commonpb.AnyValue_DoubleValue{
+					DoubleValue: v.Float(),
+				},
+			}
+		}
+	case reflect.String:
+		valueFunc = func(v reflect.Value) *commonpb.AnyValue {
+			return &commonpb.AnyValue{
+				Value: &commonpb.AnyValue_StringValue{
+					StringValue: v.String(),
+				},
+			}
+		}
+	}
+
+	results := make([]*commonpb.AnyValue, aType.Len())
+	for i, aValue := 0, reflect.ValueOf(a); i < aValue.Len(); i++ {
+		results[i] = valueFunc(aValue.Index(i))
+	}
+	return results
+}
diff --git a/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/tracetransform/instrumentation.go b/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/tracetransform/instrumentation.go
new file mode 100644
index 000000000..81875a575
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/tracetransform/instrumentation.go
@@ -0,0 +1,31 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package tracetransform
+
+import (
+	commonpb "go.opentelemetry.io/proto/otlp/common/v1"
+
+	"go.opentelemetry.io/otel/sdk/instrumentation"
+)
+
+func InstrumentationLibrary(il instrumentation.Library) *commonpb.InstrumentationLibrary {
+	if il == (instrumentation.Library{}) {
+		return nil
+	}
+	return &commonpb.InstrumentationLibrary{
+		Name:    il.Name,
+		Version: il.Version,
+	}
+}
diff --git a/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/tracetransform/resource.go b/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/tracetransform/resource.go
new file mode 100644
index 000000000..018d0fb25
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/tracetransform/resource.go
@@ -0,0 +1,29 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package tracetransform
+
+import (
+	resourcepb "go.opentelemetry.io/proto/otlp/resource/v1"
+
+	"go.opentelemetry.io/otel/sdk/resource"
+)
+
+// Resource transforms a Resource into an OTLP Resource.
+func Resource(r *resource.Resource) *resourcepb.Resource {
+	if r == nil {
+		return nil
+	}
+	return &resourcepb.Resource{Attributes: ResourceAttributes(r)}
+}
diff --git a/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/tracetransform/span.go b/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/tracetransform/span.go
new file mode 100644
index 000000000..5e455204a
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/tracetransform/span.go
@@ -0,0 +1,218 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package tracetransform
+
+import (
+	"go.opentelemetry.io/otel/attribute"
+	"go.opentelemetry.io/otel/codes"
+	tracepb "go.opentelemetry.io/proto/otlp/trace/v1"
+
+	"go.opentelemetry.io/otel/sdk/instrumentation"
+	tracesdk "go.opentelemetry.io/otel/sdk/trace"
+	"go.opentelemetry.io/otel/trace"
+)
+
+const (
+	maxEventsPerSpan = 128
+)
+
+// Spans transforms a slice of OpenTelemetry spans into a slice of OTLP
+// ResourceSpans.
+func Spans(sdl []tracesdk.ReadOnlySpan) []*tracepb.ResourceSpans {
+	if len(sdl) == 0 {
+		return nil
+	}
+
+	rsm := make(map[attribute.Distinct]*tracepb.ResourceSpans)
+
+	type ilsKey struct {
+		r  attribute.Distinct
+		il instrumentation.Library
+	}
+	ilsm := make(map[ilsKey]*tracepb.InstrumentationLibrarySpans)
+
+	var resources int
+	for _, sd := range sdl {
+		if sd == nil {
+			continue
+		}
+
+		rKey := sd.Resource().Equivalent()
+		iKey := ilsKey{
+			r:  rKey,
+			il: sd.InstrumentationLibrary(),
+		}
+		ils, iOk := ilsm[iKey]
+		if !iOk {
+			// Either the resource or instrumentation library were unknown.
+			ils = &tracepb.InstrumentationLibrarySpans{
+				InstrumentationLibrary: InstrumentationLibrary(sd.InstrumentationLibrary()),
+				Spans:                  []*tracepb.Span{},
+			}
+		}
+		ils.Spans = append(ils.Spans, span(sd))
+		ilsm[iKey] = ils
+
+		rs, rOk := rsm[rKey]
+		if !rOk {
+			resources++
+			// The resource was unknown.
+			rs = &tracepb.ResourceSpans{
+				Resource:                    Resource(sd.Resource()),
+				InstrumentationLibrarySpans: []*tracepb.InstrumentationLibrarySpans{ils},
+			}
+			rsm[rKey] = rs
+			continue
+		}
+
+		// The resource has been seen before. Check if the instrumentation
+		// library lookup was unknown because if so we need to add it to the
+		// ResourceSpans. Otherwise, the instrumentation library has already
+		// been seen and the append we did above will be included it in the
+		// InstrumentationLibrarySpans reference.
+		if !iOk {
+			rs.InstrumentationLibrarySpans = append(rs.InstrumentationLibrarySpans, ils)
+		}
+	}
+
+	// Transform the categorized map into a slice
+	rss := make([]*tracepb.ResourceSpans, 0, resources)
+	for _, rs := range rsm {
+		rss = append(rss, rs)
+	}
+	return rss
+}
+
+// span transforms a Span into an OTLP span.
+func span(sd tracesdk.ReadOnlySpan) *tracepb.Span {
+	if sd == nil {
+		return nil
+	}
+
+	tid := sd.SpanContext().TraceID()
+	sid := sd.SpanContext().SpanID()
+
+	s := &tracepb.Span{
+		TraceId:                tid[:],
+		SpanId:                 sid[:],
+		TraceState:             sd.SpanContext().TraceState().String(),
+		Status:                 status(sd.Status().Code, sd.Status().Description),
+		StartTimeUnixNano:      uint64(sd.StartTime().UnixNano()),
+		EndTimeUnixNano:        uint64(sd.EndTime().UnixNano()),
+		Links:                  links(sd.Links()),
+		Kind:                   spanKind(sd.SpanKind()),
+		Name:                   sd.Name(),
+		Attributes:             Attributes(sd.Attributes()),
+		Events:                 spanEvents(sd.Events()),
+		DroppedAttributesCount: uint32(sd.DroppedAttributes()),
+		DroppedEventsCount:     uint32(sd.DroppedEvents()),
+		DroppedLinksCount:      uint32(sd.DroppedLinks()),
+	}
+
+	if psid := sd.Parent().SpanID(); psid.IsValid() {
+		s.ParentSpanId = psid[:]
+	}
+
+	return s
+}
+
+// status transform a span code and message into an OTLP span status.
+func status(status codes.Code, message string) *tracepb.Status {
+	var c tracepb.Status_StatusCode
+	switch status {
+	case codes.Error:
+		c = tracepb.Status_STATUS_CODE_ERROR
+	default:
+		c = tracepb.Status_STATUS_CODE_OK
+	}
+	return &tracepb.Status{
+		Code:    c,
+		Message: message,
+	}
+}
+
+// links transforms span Links to OTLP span links.
+func links(links []trace.Link) []*tracepb.Span_Link {
+	if len(links) == 0 {
+		return nil
+	}
+
+	sl := make([]*tracepb.Span_Link, 0, len(links))
+	for _, otLink := range links {
+		// This redefinition is necessary to prevent otLink.*ID[:] copies
+		// being reused -- in short we need a new otLink per iteration.
+		otLink := otLink
+
+		tid := otLink.SpanContext.TraceID()
+		sid := otLink.SpanContext.SpanID()
+
+		sl = append(sl, &tracepb.Span_Link{
+			TraceId:    tid[:],
+			SpanId:     sid[:],
+			Attributes: Attributes(otLink.Attributes),
+		})
+	}
+	return sl
+}
+
+// spanEvents transforms span Events to an OTLP span events.
+func spanEvents(es []tracesdk.Event) []*tracepb.Span_Event {
+	if len(es) == 0 {
+		return nil
+	}
+
+	evCount := len(es)
+	if evCount > maxEventsPerSpan {
+		evCount = maxEventsPerSpan
+	}
+	events := make([]*tracepb.Span_Event, 0, evCount)
+	nEvents := 0
+
+	// Transform message events
+	for _, e := range es {
+		if nEvents >= maxEventsPerSpan {
+			break
+		}
+		nEvents++
+		events = append(events,
+			&tracepb.Span_Event{
+				Name:         e.Name,
+				TimeUnixNano: uint64(e.Time.UnixNano()),
+				Attributes:   Attributes(e.Attributes),
+				// TODO (rghetia) : Add Drop Counts when supported.
+			},
+		)
+	}
+
+	return events
+}
+
+// spanKind transforms a SpanKind to an OTLP span kind.
+func spanKind(kind trace.SpanKind) tracepb.Span_SpanKind {
+	switch kind {
+	case trace.SpanKindInternal:
+		return tracepb.Span_SPAN_KIND_INTERNAL
+	case trace.SpanKindClient:
+		return tracepb.Span_SPAN_KIND_CLIENT
+	case trace.SpanKindServer:
+		return tracepb.Span_SPAN_KIND_SERVER
+	case trace.SpanKindProducer:
+		return tracepb.Span_SPAN_KIND_PRODUCER
+	case trace.SpanKindConsumer:
+		return tracepb.Span_SPAN_KIND_CONSUMER
+	default:
+		return tracepb.Span_SPAN_KIND_UNSPECIFIED
+	}
+}
diff --git a/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/LICENSE b/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/LICENSE
new file mode 100644
index 000000000..261eeb9e9
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/LICENSE
@@ -0,0 +1,201 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
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+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
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+      Work and such Derivative Works in Source or Object form.
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+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
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+      or a Contribution incorporated within the Work constitutes direct
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+
+   4. Redistribution. You may reproduce and distribute copies of the
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+      meet the following conditions:
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+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
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+          stating that You changed the files; and
+
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+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
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+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
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+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
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+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
diff --git a/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/client.go b/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/client.go
new file mode 100644
index 000000000..b17b9291c
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/client.go
@@ -0,0 +1,110 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package otlptracegrpc // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc"
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"sync"
+
+	"go.opentelemetry.io/otel/exporters/otlp/otlptrace"
+	"go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/connection"
+
+	"go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/otlpconfig"
+
+	"google.golang.org/grpc"
+
+	coltracepb "go.opentelemetry.io/proto/otlp/collector/trace/v1"
+	tracepb "go.opentelemetry.io/proto/otlp/trace/v1"
+)
+
+type client struct {
+	connection *connection.Connection
+
+	lock         sync.Mutex
+	tracesClient coltracepb.TraceServiceClient
+}
+
+var _ otlptrace.Client = (*client)(nil)
+
+var (
+	errNoClient = errors.New("no client")
+)
+
+// NewClient creates a new gRPC trace client.
+func NewClient(opts ...Option) otlptrace.Client {
+	cfg := otlpconfig.NewDefaultConfig()
+	otlpconfig.ApplyGRPCEnvConfigs(&cfg)
+	for _, opt := range opts {
+		opt.applyGRPCOption(&cfg)
+	}
+
+	c := &client{}
+	c.connection = connection.NewConnection(cfg, cfg.Traces, c.handleNewConnection)
+
+	return c
+}
+
+func (c *client) handleNewConnection(cc *grpc.ClientConn) {
+	c.lock.Lock()
+	defer c.lock.Unlock()
+	if cc != nil {
+		c.tracesClient = coltracepb.NewTraceServiceClient(cc)
+	} else {
+		c.tracesClient = nil
+	}
+}
+
+// Start establishes a connection to the collector.
+func (c *client) Start(ctx context.Context) error {
+	return c.connection.StartConnection(ctx)
+}
+
+// Stop shuts down the connection to the collector.
+func (c *client) Stop(ctx context.Context) error {
+	return c.connection.Shutdown(ctx)
+}
+
+// UploadTraces sends a batch of spans to the collector.
+func (c *client) UploadTraces(ctx context.Context, protoSpans []*tracepb.ResourceSpans) error {
+	if !c.connection.Connected() {
+		return fmt.Errorf("traces exporter is disconnected from the server %s: %w", c.connection.SCfg.Endpoint, c.connection.LastConnectError())
+	}
+
+	ctx, cancel := c.connection.ContextWithStop(ctx)
+	defer cancel()
+	ctx, tCancel := context.WithTimeout(ctx, c.connection.SCfg.Timeout)
+	defer tCancel()
+
+	ctx = c.connection.ContextWithMetadata(ctx)
+	err := func() error {
+		c.lock.Lock()
+		defer c.lock.Unlock()
+		if c.tracesClient == nil {
+			return errNoClient
+		}
+		return c.connection.DoRequest(ctx, func(ctx context.Context) error {
+			_, err := c.tracesClient.Export(ctx, &coltracepb.ExportTraceServiceRequest{
+				ResourceSpans: protoSpans,
+			})
+			return err
+		})
+	}()
+	if err != nil {
+		c.connection.SetStateDisconnected(err)
+	}
+	return err
+}
diff --git a/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/exporter.go b/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/exporter.go
new file mode 100644
index 000000000..89af41002
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/exporter.go
@@ -0,0 +1,31 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package otlptracegrpc // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc"
+
+import (
+	"context"
+
+	"go.opentelemetry.io/otel/exporters/otlp/otlptrace"
+)
+
+// New constructs a new Exporter and starts it.
+func New(ctx context.Context, opts ...Option) (*otlptrace.Exporter, error) {
+	return otlptrace.New(ctx, NewClient(opts...))
+}
+
+// NewUnstarted constructs a new Exporter and does not start it.
+func NewUnstarted(opts ...Option) *otlptrace.Exporter {
+	return otlptrace.NewUnstarted(NewClient(opts...))
+}
diff --git a/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/go.mod b/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/go.mod
new file mode 100644
index 000000000..ed492b735
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/go.mod
@@ -0,0 +1,78 @@
+module go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc
+
+go 1.15
+
+require (
+	github.com/stretchr/testify v1.7.0
+	go.opentelemetry.io/otel v1.0.0-RC1
+	go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.0.0-RC1
+	go.opentelemetry.io/otel/sdk v1.0.0-RC1
+	go.opentelemetry.io/proto/otlp v0.9.0
+	google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013
+	google.golang.org/grpc v1.38.0
+	google.golang.org/protobuf v1.26.0
+)
+
+replace go.opentelemetry.io/otel => ../../../..
+
+replace go.opentelemetry.io/otel/sdk => ../../../../sdk
+
+replace go.opentelemetry.io/otel/exporters/otlp/otlptrace => ../
+
+replace go.opentelemetry.io/otel/metric => ../../../../metric
+
+replace go.opentelemetry.io/otel/oteltest => ../../../../oteltest
+
+replace go.opentelemetry.io/otel/trace => ../../../../trace
+
+replace go.opentelemetry.io/otel/bridge/opencensus => ../../../../bridge/opencensus
+
+replace go.opentelemetry.io/otel/bridge/opentracing => ../../../../bridge/opentracing
+
+replace go.opentelemetry.io/otel/example/jaeger => ../../../../example/jaeger
+
+replace go.opentelemetry.io/otel/example/namedtracer => ../../../../example/namedtracer
+
+replace go.opentelemetry.io/otel/example/opencensus => ../../../../example/opencensus
+
+replace go.opentelemetry.io/otel/example/otel-collector => ../../../../example/otel-collector
+
+replace go.opentelemetry.io/otel/example/prom-collector => ../../../../example/prom-collector
+
+replace go.opentelemetry.io/otel/example/prometheus => ../../../../example/prometheus
+
+replace go.opentelemetry.io/otel/example/zipkin => ../../../../example/zipkin
+
+replace go.opentelemetry.io/otel/exporters/prometheus => ../../../prometheus
+
+replace go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc => ./
+
+replace go.opentelemetry.io/otel/exporters/jaeger => ../../../jaeger
+
+replace go.opentelemetry.io/otel/exporters/zipkin => ../../../zipkin
+
+replace go.opentelemetry.io/otel/internal/tools => ../../../../internal/tools
+
+replace go.opentelemetry.io/otel/sdk/export/metric => ../../../../sdk/export/metric
+
+replace go.opentelemetry.io/otel/sdk/metric => ../../../../sdk/metric
+
+replace go.opentelemetry.io/otel/example/passthrough => ../../../../example/passthrough
+
+replace go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp => ../otlptracehttp
+
+replace go.opentelemetry.io/otel/internal/metric => ../../../../internal/metric
+
+replace go.opentelemetry.io/otel/exporters/metric/prometheus => ../../../metric/prometheus
+
+replace go.opentelemetry.io/otel/exporters/trace/jaeger => ../../../trace/jaeger
+
+replace go.opentelemetry.io/otel/exporters/trace/zipkin => ../../../trace/zipkin
+
+replace go.opentelemetry.io/otel/exporters/otlp/otlpmetric => ../../otlpmetric
+
+replace go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc => ../../otlpmetric/otlpmetricgrpc
+
+replace go.opentelemetry.io/otel/exporters/stdout/stdoutmetric => ../../../stdout/stdoutmetric
+
+replace go.opentelemetry.io/otel/exporters/stdout/stdouttrace => ../../../stdout/stdouttrace
diff --git a/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/go.sum b/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/go.sum
new file mode 100644
index 000000000..a40bb40cf
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/go.sum
@@ -0,0 +1,123 @@
+cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/antihax/optional v1.0.0/go.mod h1:uupD/76wgC+ih3iEmQUL+0Ugr19nfwCT1kdvxnR2qWY=
+github.com/cenkalti/backoff/v4 v4.1.1 h1:G2HAfAmvm/GcKan2oOQpBXOd2tT2G57ZnZGWa1PxPBQ=
+github.com/cenkalti/backoff/v4 v4.1.1/go.mod h1:scbssz8iZGpm3xbr14ovlUdkxfGXNInqkPWOWmG2CLw=
+github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
+github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
+github.com/cncf/udpa/go v0.0.0-20191209042840-269d4d468f6f/go.mod h1:M8M6+tZqaGXZJjfX53e64911xZQV5JYwmTeXPW+k8Sc=
+github.com/cncf/udpa/go v0.0.0-20201120205902-5459f2c99403/go.mod h1:WmhPx2Nbnhtbo57+VJT5O0JRkEi1Wbu0z5j0R8u5Hbk=
+github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/envoyproxy/go-control-plane v0.9.0/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
+github.com/envoyproxy/go-control-plane v0.9.1-0.20191026205805-5f8ba28d4473/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
+github.com/envoyproxy/go-control-plane v0.9.4/go.mod h1:6rpuAdCZL397s3pYoYcLgu1mIlRU8Am5FuJP05cCM98=
+github.com/envoyproxy/go-control-plane v0.9.9-0.20210217033140-668b12f5399d/go.mod h1:cXg6YxExXjJnVBQHBLXeUAgxn2UodCpnH306RInaBQk=
+github.com/envoyproxy/protoc-gen-validate v0.1.0/go.mod h1:iSmxcyjqTsJpI2R4NaDN7+kN2VEUnK/pcBlmesArF7c=
+github.com/ghodss/yaml v1.0.0/go.mod h1:4dBDuWmgqj2HViK6kFavaiC9ZROes6MMH2rRYeMEF04=
+github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
+github.com/golang/mock v1.1.1/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfbm0A=
+github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
+github.com/golang/protobuf v1.3.2/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
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diff --git a/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/options.go b/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/options.go
new file mode 100644
index 000000000..2a483f7d8
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/options.go
@@ -0,0 +1,132 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package otlptracegrpc // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc"
+
+import (
+	"fmt"
+	"time"
+
+	"go.opentelemetry.io/otel"
+	"go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/otlpconfig"
+
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/credentials"
+)
+
+// Option applies an option to the gRPC driver.
+type Option interface {
+	applyGRPCOption(*otlpconfig.Config)
+}
+
+// RetrySettings defines configuration for retrying batches in case of export failure
+// using an exponential backoff.
+type RetrySettings otlpconfig.RetrySettings
+
+type wrappedOption struct {
+	otlpconfig.GRPCOption
+}
+
+func (w wrappedOption) applyGRPCOption(cfg *otlpconfig.Config) {
+	w.ApplyGRPCOption(cfg)
+}
+
+// WithInsecure disables client transport security for the exporter's gRPC connection
+// just like grpc.WithInsecure() https://pkg.go.dev/google.golang.org/grpc#WithInsecure
+// does. Note, by default, client security is required unless WithInsecure is used.
+func WithInsecure() Option {
+	return wrappedOption{otlpconfig.WithInsecure()}
+}
+
+// WithEndpoint allows one to set the endpoint that the exporter will
+// connect to the collector on. If unset, it will instead try to use
+// connect to DefaultCollectorHost:DefaultCollectorPort.
+func WithEndpoint(endpoint string) Option {
+	return wrappedOption{otlpconfig.WithEndpoint(endpoint)}
+}
+
+// WithReconnectionPeriod allows one to set the delay between next connection attempt
+// after failing to connect with the collector.
+func WithReconnectionPeriod(rp time.Duration) Option {
+	return wrappedOption{otlpconfig.NewGRPCOption(func(cfg *otlpconfig.Config) {
+		cfg.ReconnectionPeriod = rp
+	})}
+}
+
+func compressorToCompression(compressor string) otlpconfig.Compression {
+	switch compressor {
+	case "gzip":
+		return otlpconfig.GzipCompression
+	}
+
+	otel.Handle(fmt.Errorf("invalid compression type: '%s', using no compression as default", compressor))
+	return otlpconfig.NoCompression
+}
+
+// WithCompressor will set the compressor for the gRPC client to use when sending requests.
+// It is the responsibility of the caller to ensure that the compressor set has been registered
+// with google.golang.org/grpc/encoding. This can be done by encoding.RegisterCompressor. Some
+// compressors auto-register on import, such as gzip, which can be registered by calling
+// `import _ "google.golang.org/grpc/encoding/gzip"`.
+func WithCompressor(compressor string) Option {
+	return wrappedOption{otlpconfig.WithCompression(compressorToCompression(compressor))}
+}
+
+// WithHeaders will send the provided headers with gRPC requests.
+func WithHeaders(headers map[string]string) Option {
+	return wrappedOption{otlpconfig.WithHeaders(headers)}
+}
+
+// WithTLSCredentials allows the connection to use TLS credentials
+// when talking to the server. It takes in grpc.TransportCredentials instead
+// of say a Certificate file or a tls.Certificate, because the retrieving of
+// these credentials can be done in many ways e.g. plain file, in code tls.Config
+// or by certificate rotation, so it is up to the caller to decide what to use.
+func WithTLSCredentials(creds credentials.TransportCredentials) Option {
+	return wrappedOption{otlpconfig.NewGRPCOption(func(cfg *otlpconfig.Config) {
+		cfg.Traces.GRPCCredentials = creds
+	})}
+}
+
+// WithServiceConfig defines the default gRPC service config used.
+func WithServiceConfig(serviceConfig string) Option {
+	return wrappedOption{otlpconfig.NewGRPCOption(func(cfg *otlpconfig.Config) {
+		cfg.ServiceConfig = serviceConfig
+	})}
+}
+
+// WithDialOption opens support to any grpc.DialOption to be used. If it conflicts
+// with some other configuration the GRPC specified via the collector the ones here will
+// take preference since they are set last.
+func WithDialOption(opts ...grpc.DialOption) Option {
+	return wrappedOption{otlpconfig.NewGRPCOption(func(cfg *otlpconfig.Config) {
+		cfg.DialOptions = opts
+	})}
+}
+
+// WithTimeout tells the driver the max waiting time for the backend to process
+// each spans batch. If unset, the default will be 10 seconds.
+func WithTimeout(duration time.Duration) Option {
+	return wrappedOption{otlpconfig.WithTimeout(duration)}
+}
+
+// WithRetry configures the retry policy for transient errors that may occurs when
+// exporting traces. An exponential back-off algorithm is used to
+// ensure endpoints are not overwhelmed with retries. If unset, the default
+// ensure endpoints are not overwhelmed with retries. If unset, the default
+// retry policy will retry after 5 seconds and increase exponentially after each
+// error for a total of 1 minute.
+func WithRetry(settings RetrySettings) Option {
+	return wrappedOption{otlpconfig.WithRetry(otlpconfig.RetrySettings(settings))}
+}
diff --git a/vendor/go.opentelemetry.io/otel/get_main_pkgs.sh b/vendor/go.opentelemetry.io/otel/get_main_pkgs.sh
new file mode 100644
index 000000000..9a58fb1d3
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/get_main_pkgs.sh
@@ -0,0 +1,41 @@
+#!/usr/bin/env bash
+
+# Copyright The OpenTelemetry Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+set -euo pipefail
+
+top_dir='.'
+if [[ $# -gt 0 ]]; then
+    top_dir="${1}"
+fi
+
+p=$(pwd)
+mod_dirs=()
+
+# Note `mapfile` does not exist in older bash versions:
+# https://stackoverflow.com/questions/41475261/need-alternative-to-readarray-mapfile-for-script-on-older-version-of-bash
+
+while IFS= read -r line; do
+    mod_dirs+=("$line")
+done < <(find "${top_dir}" -type f -name 'go.mod' -exec dirname {} \; | sort)
+
+for mod_dir in "${mod_dirs[@]}"; do
+    cd "${mod_dir}"
+
+    while IFS= read -r line; do
+        echo ".${line#${p}}"
+    done < <(go list --find -f '{{.Name}}|{{.Dir}}' ./... | grep '^main|' | cut -f 2- -d '|')
+    cd "${p}"
+done
diff --git a/vendor/go.opentelemetry.io/otel/go.mod b/vendor/go.opentelemetry.io/otel/go.mod
new file mode 100644
index 000000000..bcf7a924e
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/go.mod
@@ -0,0 +1,74 @@
+module go.opentelemetry.io/otel
+
+go 1.15
+
+require (
+	github.com/google/go-cmp v0.5.6
+	github.com/stretchr/testify v1.7.0
+	go.opentelemetry.io/otel/oteltest v1.0.0-RC1
+	go.opentelemetry.io/otel/trace v1.0.0-RC1
+)
+
+replace go.opentelemetry.io/otel => ./
+
+replace go.opentelemetry.io/otel/bridge/opencensus => ./bridge/opencensus
+
+replace go.opentelemetry.io/otel/bridge/opentracing => ./bridge/opentracing
+
+replace go.opentelemetry.io/otel/example/jaeger => ./example/jaeger
+
+replace go.opentelemetry.io/otel/example/namedtracer => ./example/namedtracer
+
+replace go.opentelemetry.io/otel/example/opencensus => ./example/opencensus
+
+replace go.opentelemetry.io/otel/example/otel-collector => ./example/otel-collector
+
+replace go.opentelemetry.io/otel/example/prom-collector => ./example/prom-collector
+
+replace go.opentelemetry.io/otel/example/prometheus => ./example/prometheus
+
+replace go.opentelemetry.io/otel/example/zipkin => ./example/zipkin
+
+replace go.opentelemetry.io/otel/exporters/prometheus => ./exporters/prometheus
+
+replace go.opentelemetry.io/otel/exporters/jaeger => ./exporters/jaeger
+
+replace go.opentelemetry.io/otel/exporters/zipkin => ./exporters/zipkin
+
+replace go.opentelemetry.io/otel/internal/tools => ./internal/tools
+
+replace go.opentelemetry.io/otel/sdk => ./sdk
+
+replace go.opentelemetry.io/otel/internal/metric => ./internal/metric
+
+replace go.opentelemetry.io/otel/metric => ./metric
+
+replace go.opentelemetry.io/otel/oteltest => ./oteltest
+
+replace go.opentelemetry.io/otel/sdk/export/metric => ./sdk/export/metric
+
+replace go.opentelemetry.io/otel/sdk/metric => ./sdk/metric
+
+replace go.opentelemetry.io/otel/trace => ./trace
+
+replace go.opentelemetry.io/otel/example/passthrough => ./example/passthrough
+
+replace go.opentelemetry.io/otel/exporters/otlp/otlptrace => ./exporters/otlp/otlptrace
+
+replace go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc => ./exporters/otlp/otlptrace/otlptracegrpc
+
+replace go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp => ./exporters/otlp/otlptrace/otlptracehttp
+
+replace go.opentelemetry.io/otel/exporters/metric/prometheus => ./exporters/metric/prometheus
+
+replace go.opentelemetry.io/otel/exporters/trace/jaeger => ./exporters/trace/jaeger
+
+replace go.opentelemetry.io/otel/exporters/trace/zipkin => ./exporters/trace/zipkin
+
+replace go.opentelemetry.io/otel/exporters/otlp/otlpmetric => ./exporters/otlp/otlpmetric
+
+replace go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc => ./exporters/otlp/otlpmetric/otlpmetricgrpc
+
+replace go.opentelemetry.io/otel/exporters/stdout/stdoutmetric => ./exporters/stdout/stdoutmetric
+
+replace go.opentelemetry.io/otel/exporters/stdout/stdouttrace => ./exporters/stdout/stdouttrace
diff --git a/vendor/go.opentelemetry.io/otel/go.sum b/vendor/go.opentelemetry.io/otel/go.sum
new file mode 100644
index 000000000..f212493d5
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/go.sum
@@ -0,0 +1,15 @@
+github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/google/go-cmp v0.5.6 h1:BKbKCqvP6I+rmFHt06ZmyQtvB8xAkWdhFyr0ZUNZcxQ=
+github.com/google/go-cmp v0.5.6/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
+github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
+golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
diff --git a/vendor/go.opentelemetry.io/otel/handler.go b/vendor/go.opentelemetry.io/otel/handler.go
new file mode 100644
index 000000000..27e1caa30
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/handler.go
@@ -0,0 +1,89 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package otel // import "go.opentelemetry.io/otel"
+
+import (
+	"log"
+	"os"
+	"sync"
+	"sync/atomic"
+)
+
+var (
+	// globalErrorHandler provides an ErrorHandler that can be used
+	// throughout an OpenTelemetry instrumented project. When a user
+	// specified ErrorHandler is registered (`SetErrorHandler`) all calls to
+	// `Handle` and will be delegated to the registered ErrorHandler.
+	globalErrorHandler = &loggingErrorHandler{
+		l: log.New(os.Stderr, "", log.LstdFlags),
+	}
+
+	// delegateErrorHandlerOnce ensures that a user provided ErrorHandler is
+	// only ever registered once.
+	delegateErrorHandlerOnce sync.Once
+
+	// Comiple time check that loggingErrorHandler implements ErrorHandler.
+	_ ErrorHandler = (*loggingErrorHandler)(nil)
+)
+
+// loggingErrorHandler logs all errors to STDERR.
+type loggingErrorHandler struct {
+	delegate atomic.Value
+
+	l *log.Logger
+}
+
+// setDelegate sets the ErrorHandler delegate if one is not already set.
+func (h *loggingErrorHandler) setDelegate(d ErrorHandler) {
+	if h.delegate.Load() != nil {
+		// Delegate already registered
+		return
+	}
+	h.delegate.Store(d)
+}
+
+// Handle implements ErrorHandler.
+func (h *loggingErrorHandler) Handle(err error) {
+	if d := h.delegate.Load(); d != nil {
+		d.(ErrorHandler).Handle(err)
+		return
+	}
+	h.l.Print(err)
+}
+
+// GetErrorHandler returns the global ErrorHandler instance. If no ErrorHandler
+// instance has been set (`SetErrorHandler`), the default ErrorHandler which
+// logs errors to STDERR is returned.
+func GetErrorHandler() ErrorHandler {
+	return globalErrorHandler
+}
+
+// SetErrorHandler sets the global ErrorHandler to be h.
+func SetErrorHandler(h ErrorHandler) {
+	delegateErrorHandlerOnce.Do(func() {
+		current := GetErrorHandler()
+		if current == h {
+			return
+		}
+		if internalHandler, ok := current.(*loggingErrorHandler); ok {
+			internalHandler.setDelegate(h)
+		}
+	})
+}
+
+// Handle is a convience function for ErrorHandler().Handle(err)
+func Handle(err error) {
+	GetErrorHandler().Handle(err)
+}
diff --git a/vendor/go.opentelemetry.io/otel/internal/baggage/baggage.go b/vendor/go.opentelemetry.io/otel/internal/baggage/baggage.go
new file mode 100644
index 000000000..87d0af405
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/internal/baggage/baggage.go
@@ -0,0 +1,43 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+/*
+Package baggage provides base types and functionality to store and retrieve
+baggage in Go context. This package exists because the OpenTracing bridge to
+OpenTelemetry needs to synchronize state whenever baggage for a context is
+modified and that context contains an OpenTracing span. If it were not for
+this need this package would not need to exist and the
+`go.opentelemetry.io/otel/baggage` package would be the singular place where
+W3C baggage is handled.
+*/
+package baggage
+
+// List is the collection of baggage members. The W3C allows for duplicates,
+// but OpenTelemetry does not, therefore, this is represented as a map.
+type List map[string]Item
+
+// Item is the value and metadata properties part of a list-member.
+type Item struct {
+	Value      string
+	Properties []Property
+}
+
+// Property is a metadata entry for a list-member.
+type Property struct {
+	Key, Value string
+
+	// HasValue indicates if a zero-value value means the property does not
+	// have a value or if it was the zero-value.
+	HasValue bool
+}
diff --git a/vendor/go.opentelemetry.io/otel/internal/baggage/context.go b/vendor/go.opentelemetry.io/otel/internal/baggage/context.go
new file mode 100644
index 000000000..7d8694e8c
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/internal/baggage/context.go
@@ -0,0 +1,95 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package baggage
+
+import "context"
+
+type baggageContextKeyType int
+
+const baggageKey baggageContextKeyType = iota
+
+// SetHookFunc is a callback called when storing baggage in the context.
+type SetHookFunc func(context.Context, List) context.Context
+
+// GetHookFunc is a callback called when getting baggage from the context.
+type GetHookFunc func(context.Context, List) List
+
+type baggageState struct {
+	list List
+
+	setHook SetHookFunc
+	getHook GetHookFunc
+}
+
+// ContextWithSetHook returns a copy of parent with hook configured to be
+// invoked every time ContextWithBaggage is called.
+//
+// Passing nil SetHookFunc creates a context with no set hook to call.
+func ContextWithSetHook(parent context.Context, hook SetHookFunc) context.Context {
+	var s baggageState
+	switch v := parent.Value(baggageKey).(type) {
+	case baggageState:
+		s = v
+	}
+
+	s.setHook = hook
+	return context.WithValue(parent, baggageKey, s)
+}
+
+// ContextWithGetHook returns a copy of parent with hook configured to be
+// invoked every time FromContext is called.
+//
+// Passing nil GetHookFunc creates a context with no get hook to call.
+func ContextWithGetHook(parent context.Context, hook GetHookFunc) context.Context {
+	var s baggageState
+	switch v := parent.Value(baggageKey).(type) {
+	case baggageState:
+		s = v
+	}
+
+	s.getHook = hook
+	return context.WithValue(parent, baggageKey, s)
+}
+
+// ContextWithList returns a copy of parent with baggage. Passing nil list
+// returns a context without any baggage.
+func ContextWithList(parent context.Context, list List) context.Context {
+	var s baggageState
+	switch v := parent.Value(baggageKey).(type) {
+	case baggageState:
+		s = v
+	}
+
+	s.list = list
+	ctx := context.WithValue(parent, baggageKey, s)
+	if s.setHook != nil {
+		ctx = s.setHook(ctx, list)
+	}
+
+	return ctx
+}
+
+// ListFromContext returns the baggage contained in ctx.
+func ListFromContext(ctx context.Context) List {
+	switch v := ctx.Value(baggageKey).(type) {
+	case baggageState:
+		if v.getHook != nil {
+			return v.getHook(ctx, v.list)
+		}
+		return v.list
+	default:
+		return nil
+	}
+}
diff --git a/vendor/go.opentelemetry.io/otel/internal/global/propagator.go b/vendor/go.opentelemetry.io/otel/internal/global/propagator.go
new file mode 100644
index 000000000..1c8b8589b
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/internal/global/propagator.go
@@ -0,0 +1,82 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package global
+
+import (
+	"context"
+	"sync"
+
+	"go.opentelemetry.io/otel/propagation"
+)
+
+// textMapPropagator is a default TextMapPropagator that delegates calls to a
+// registered delegate if one is set, otherwise it defaults to delegating the
+// calls to a the default no-op propagation.TextMapPropagator.
+type textMapPropagator struct {
+	mtx      sync.Mutex
+	once     sync.Once
+	delegate propagation.TextMapPropagator
+	noop     propagation.TextMapPropagator
+}
+
+// Compile-time guarantee that textMapPropagator implements the
+// propagation.TextMapPropagator interface.
+var _ propagation.TextMapPropagator = (*textMapPropagator)(nil)
+
+func newTextMapPropagator() *textMapPropagator {
+	return &textMapPropagator{
+		noop: propagation.NewCompositeTextMapPropagator(),
+	}
+}
+
+// SetDelegate sets a delegate propagation.TextMapPropagator that all calls are
+// forwarded to. Delegation can only be performed once, all subsequent calls
+// perform no delegation.
+func (p *textMapPropagator) SetDelegate(delegate propagation.TextMapPropagator) {
+	if delegate == nil {
+		return
+	}
+
+	p.mtx.Lock()
+	p.once.Do(func() { p.delegate = delegate })
+	p.mtx.Unlock()
+}
+
+// effectiveDelegate returns the current delegate of p if one is set,
+// otherwise the default noop TextMapPropagator is returned. This method
+// can be called concurrently.
+func (p *textMapPropagator) effectiveDelegate() propagation.TextMapPropagator {
+	p.mtx.Lock()
+	defer p.mtx.Unlock()
+	if p.delegate != nil {
+		return p.delegate
+	}
+	return p.noop
+}
+
+// Inject set cross-cutting concerns from the Context into the carrier.
+func (p *textMapPropagator) Inject(ctx context.Context, carrier propagation.TextMapCarrier) {
+	p.effectiveDelegate().Inject(ctx, carrier)
+}
+
+// Extract reads cross-cutting concerns from the carrier into a Context.
+func (p *textMapPropagator) Extract(ctx context.Context, carrier propagation.TextMapCarrier) context.Context {
+	return p.effectiveDelegate().Extract(ctx, carrier)
+}
+
+// Fields returns the keys whose values are set with Inject.
+func (p *textMapPropagator) Fields() []string {
+	return p.effectiveDelegate().Fields()
+}
diff --git a/vendor/go.opentelemetry.io/otel/internal/global/state.go b/vendor/go.opentelemetry.io/otel/internal/global/state.go
new file mode 100644
index 000000000..c55345576
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/internal/global/state.go
@@ -0,0 +1,106 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package global
+
+import (
+	"sync"
+	"sync/atomic"
+
+	"go.opentelemetry.io/otel/propagation"
+	"go.opentelemetry.io/otel/trace"
+)
+
+type (
+	tracerProviderHolder struct {
+		tp trace.TracerProvider
+	}
+
+	propagatorsHolder struct {
+		tm propagation.TextMapPropagator
+	}
+)
+
+var (
+	globalTracer      = defaultTracerValue()
+	globalPropagators = defaultPropagatorsValue()
+
+	delegateTraceOnce             sync.Once
+	delegateTextMapPropagatorOnce sync.Once
+)
+
+// TracerProvider is the internal implementation for global.TracerProvider.
+func TracerProvider() trace.TracerProvider {
+	return globalTracer.Load().(tracerProviderHolder).tp
+}
+
+// SetTracerProvider is the internal implementation for global.SetTracerProvider.
+func SetTracerProvider(tp trace.TracerProvider) {
+	delegateTraceOnce.Do(func() {
+		current := TracerProvider()
+		if current == tp {
+			// Setting the provider to the prior default is nonsense, panic.
+			// Panic is acceptable because we are likely still early in the
+			// process lifetime.
+			panic("invalid TracerProvider, the global instance cannot be reinstalled")
+		} else if def, ok := current.(*tracerProvider); ok {
+			def.setDelegate(tp)
+		}
+
+	})
+	globalTracer.Store(tracerProviderHolder{tp: tp})
+}
+
+// TextMapPropagator is the internal implementation for global.TextMapPropagator.
+func TextMapPropagator() propagation.TextMapPropagator {
+	return globalPropagators.Load().(propagatorsHolder).tm
+}
+
+// SetTextMapPropagator is the internal implementation for global.SetTextMapPropagator.
+func SetTextMapPropagator(p propagation.TextMapPropagator) {
+	// For the textMapPropagator already returned by TextMapPropagator
+	// delegate to p.
+	delegateTextMapPropagatorOnce.Do(func() {
+		if current := TextMapPropagator(); current == p {
+			// Setting the provider to the prior default is nonsense, panic.
+			// Panic is acceptable because we are likely still early in the
+			// process lifetime.
+			panic("invalid TextMapPropagator, the global instance cannot be reinstalled")
+		} else if def, ok := current.(*textMapPropagator); ok {
+			def.SetDelegate(p)
+		}
+	})
+	// Return p when subsequent calls to TextMapPropagator are made.
+	globalPropagators.Store(propagatorsHolder{tm: p})
+}
+
+func defaultTracerValue() *atomic.Value {
+	v := &atomic.Value{}
+	v.Store(tracerProviderHolder{tp: &tracerProvider{}})
+	return v
+}
+
+func defaultPropagatorsValue() *atomic.Value {
+	v := &atomic.Value{}
+	v.Store(propagatorsHolder{tm: newTextMapPropagator()})
+	return v
+}
+
+// ResetForTest restores the initial global state, for testing purposes.
+func ResetForTest() {
+	globalTracer = defaultTracerValue()
+	globalPropagators = defaultPropagatorsValue()
+	delegateTraceOnce = sync.Once{}
+	delegateTextMapPropagatorOnce = sync.Once{}
+}
diff --git a/vendor/go.opentelemetry.io/otel/internal/global/trace.go b/vendor/go.opentelemetry.io/otel/internal/global/trace.go
new file mode 100644
index 000000000..24fd2a6e4
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/internal/global/trace.go
@@ -0,0 +1,191 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package global
+
+/*
+This file contains the forwarding implementation of the TracerProvider used as
+the default global instance. Prior to initialization of an SDK, Tracers
+returned by the global TracerProvider will provide no-op functionality. This
+means that all Span created prior to initialization are no-op Spans.
+
+Once an SDK has been initialized, all provided no-op Tracers are swapped for
+Tracers provided by the SDK defined TracerProvider. However, any Span started
+prior to this initialization does not change its behavior. Meaning, the Span
+remains a no-op Span.
+
+The implementation to track and swap Tracers locks all new Tracer creation
+until the swap is complete. This assumes that this operation is not
+performance-critical. If that assumption is incorrect, be sure to configure an
+SDK prior to any Tracer creation.
+*/
+
+import (
+	"context"
+	"sync"
+	"sync/atomic"
+
+	"go.opentelemetry.io/otel/attribute"
+	"go.opentelemetry.io/otel/codes"
+	"go.opentelemetry.io/otel/trace"
+)
+
+// tracerProvider is a placeholder for a configured SDK TracerProvider.
+//
+// All TracerProvider functionality is forwarded to a delegate once
+// configured.
+type tracerProvider struct {
+	mtx      sync.Mutex
+	tracers  map[il]*tracer
+	delegate trace.TracerProvider
+}
+
+// Compile-time guarantee that tracerProvider implements the TracerProvider
+// interface.
+var _ trace.TracerProvider = &tracerProvider{}
+
+// setDelegate configures p to delegate all TracerProvider functionality to
+// provider.
+//
+// All Tracers provided prior to this function call are switched out to be
+// Tracers provided by provider.
+//
+// It is guaranteed by the caller that this happens only once.
+func (p *tracerProvider) setDelegate(provider trace.TracerProvider) {
+	p.mtx.Lock()
+	defer p.mtx.Unlock()
+
+	p.delegate = provider
+
+	if len(p.tracers) == 0 {
+		return
+	}
+
+	for _, t := range p.tracers {
+		t.setDelegate(provider)
+	}
+
+	p.tracers = nil
+}
+
+// Tracer implements TracerProvider.
+func (p *tracerProvider) Tracer(name string, opts ...trace.TracerOption) trace.Tracer {
+	p.mtx.Lock()
+	defer p.mtx.Unlock()
+
+	if p.delegate != nil {
+		return p.delegate.Tracer(name, opts...)
+	}
+
+	// At this moment it is guaranteed that no sdk is installed, save the tracer in the tracers map.
+
+	key := il{
+		name:    name,
+		version: trace.NewTracerConfig(opts...).InstrumentationVersion(),
+	}
+
+	if p.tracers == nil {
+		p.tracers = make(map[il]*tracer)
+	}
+
+	if val, ok := p.tracers[key]; ok {
+		return val
+	}
+
+	t := &tracer{name: name, opts: opts, provider: p}
+	p.tracers[key] = t
+	return t
+}
+
+type il struct {
+	name    string
+	version string
+}
+
+// tracer is a placeholder for a trace.Tracer.
+//
+// All Tracer functionality is forwarded to a delegate once configured.
+// Otherwise, all functionality is forwarded to a NoopTracer.
+type tracer struct {
+	name     string
+	opts     []trace.TracerOption
+	provider *tracerProvider
+
+	delegate atomic.Value
+}
+
+// Compile-time guarantee that tracer implements the trace.Tracer interface.
+var _ trace.Tracer = &tracer{}
+
+// setDelegate configures t to delegate all Tracer functionality to Tracers
+// created by provider.
+//
+// All subsequent calls to the Tracer methods will be passed to the delegate.
+//
+// It is guaranteed by the caller that this happens only once.
+func (t *tracer) setDelegate(provider trace.TracerProvider) {
+	t.delegate.Store(provider.Tracer(t.name, t.opts...))
+}
+
+// Start implements trace.Tracer by forwarding the call to t.delegate if
+// set, otherwise it forwards the call to a NoopTracer.
+func (t *tracer) Start(ctx context.Context, name string, opts ...trace.SpanStartOption) (context.Context, trace.Span) {
+	delegate := t.delegate.Load()
+	if delegate != nil {
+		return delegate.(trace.Tracer).Start(ctx, name, opts...)
+	}
+
+	s := nonRecordingSpan{sc: trace.SpanContextFromContext(ctx), tracer: t}
+	ctx = trace.ContextWithSpan(ctx, s)
+	return ctx, s
+}
+
+// nonRecordingSpan is a minimal implementation of a Span that wraps a
+// SpanContext. It performs no operations other than to return the wrapped
+// SpanContext.
+type nonRecordingSpan struct {
+	sc     trace.SpanContext
+	tracer *tracer
+}
+
+var _ trace.Span = nonRecordingSpan{}
+
+// SpanContext returns the wrapped SpanContext.
+func (s nonRecordingSpan) SpanContext() trace.SpanContext { return s.sc }
+
+// IsRecording always returns false.
+func (nonRecordingSpan) IsRecording() bool { return false }
+
+// SetStatus does nothing.
+func (nonRecordingSpan) SetStatus(codes.Code, string) {}
+
+// SetError does nothing.
+func (nonRecordingSpan) SetError(bool) {}
+
+// SetAttributes does nothing.
+func (nonRecordingSpan) SetAttributes(...attribute.KeyValue) {}
+
+// End does nothing.
+func (nonRecordingSpan) End(...trace.SpanEndOption) {}
+
+// RecordError does nothing.
+func (nonRecordingSpan) RecordError(error, ...trace.EventOption) {}
+
+// AddEvent does nothing.
+func (nonRecordingSpan) AddEvent(string, ...trace.EventOption) {}
+
+// SetName does nothing.
+func (nonRecordingSpan) SetName(string) {}
+
+func (s nonRecordingSpan) TracerProvider() trace.TracerProvider { return s.tracer.provider }
diff --git a/vendor/go.opentelemetry.io/otel/internal/rawhelpers.go b/vendor/go.opentelemetry.io/otel/internal/rawhelpers.go
new file mode 100644
index 000000000..0d806b1c8
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/internal/rawhelpers.go
@@ -0,0 +1,55 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package internal
+
+import (
+	"math"
+	"unsafe"
+)
+
+func BoolToRaw(b bool) uint64 {
+	if b {
+		return 1
+	}
+	return 0
+}
+
+func RawToBool(r uint64) bool {
+	return r != 0
+}
+
+func Int64ToRaw(i int64) uint64 {
+	return uint64(i)
+}
+
+func RawToInt64(r uint64) int64 {
+	return int64(r)
+}
+
+func Float64ToRaw(f float64) uint64 {
+	return math.Float64bits(f)
+}
+
+func RawToFloat64(r uint64) float64 {
+	return math.Float64frombits(r)
+}
+
+func RawPtrToFloat64Ptr(r *uint64) *float64 {
+	return (*float64)(unsafe.Pointer(r))
+}
+
+func RawPtrToInt64Ptr(r *uint64) *int64 {
+	return (*int64)(unsafe.Pointer(r))
+}
diff --git a/vendor/go.opentelemetry.io/otel/pre_release.sh b/vendor/go.opentelemetry.io/otel/pre_release.sh
new file mode 100644
index 000000000..0de22169c
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/pre_release.sh
@@ -0,0 +1,95 @@
+#!/bin/bash
+
+# Copyright The OpenTelemetry Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+set -e
+
+help()
+{
+   printf "\n"
+   printf "Usage: $0 -t tag\n"
+   printf "\t-t Unreleased tag. Update all go.mod with this tag.\n"
+   exit 1 # Exit script after printing help
+}
+
+while getopts "t:" opt
+do
+   case "$opt" in
+      t ) TAG="$OPTARG" ;;
+      ? ) help ;; # Print help
+   esac
+done
+
+# Print help in case parameters are empty
+if [ -z "$TAG" ]
+then
+   printf "Tag is missing\n";
+   help
+fi
+
+# Validate semver
+SEMVER_REGEX="^v(0|[1-9][0-9]*)\\.(0|[1-9][0-9]*)\\.(0|[1-9][0-9]*)(\\-[0-9A-Za-z-]+(\\.[0-9A-Za-z-]+)*)?(\\+[0-9A-Za-z-]+(\\.[0-9A-Za-z-]+)*)?$"
+if [[ "${TAG}" =~ ${SEMVER_REGEX} ]]; then
+	printf "${TAG} is valid semver tag.\n"
+else
+	printf "${TAG} is not a valid semver tag.\n"
+	exit -1
+fi
+
+TAG_FOUND=`git tag --list ${TAG}`
+if [[ ${TAG_FOUND} = ${TAG} ]] ; then
+        printf "Tag ${TAG} already exists\n"
+        exit -1
+fi
+
+# Get version for version.go
+OTEL_VERSION=$(echo "${TAG}" | grep -o '^v[0-9]\+\.[0-9]\+\.[0-9]\+')
+# Strip leading v
+OTEL_VERSION="${OTEL_VERSION#v}"
+
+cd $(dirname $0)
+
+if ! git diff --quiet; then \
+	printf "Working tree is not clean, can't proceed with the release process\n"
+	git status
+	git diff
+	exit 1
+fi
+
+# Update version.go
+cp ./version.go ./version.go.bak
+sed "s/\(return \"\)[0-9]*\.[0-9]*\.[0-9]*\"/\1${OTEL_VERSION}\"/" ./version.go.bak >./version.go
+rm -f ./version.go.bak
+
+# Update go.mod
+git checkout -b pre_release_${TAG} main
+PACKAGE_DIRS=$(find . -mindepth 2 -type f -name 'go.mod' -exec dirname {} \; | egrep -v 'tools' | sed 's/^\.\///' | sort)
+
+for dir in $PACKAGE_DIRS; do
+	cp "${dir}/go.mod" "${dir}/go.mod.bak"
+	sed "s/opentelemetry.io\/otel\([^ ]*\) v[0-9]*\.[0-9]*\.[0-9]/opentelemetry.io\/otel\1 ${TAG}/" "${dir}/go.mod.bak" >"${dir}/go.mod"
+	rm -f "${dir}/go.mod.bak"
+done
+
+# Run lint to update go.sum
+make lint
+
+# Add changes and commit.
+git add .
+make ci
+git commit -m "Prepare for releasing $TAG"
+
+printf "Now run following to verify the changes.\ngit diff main\n"
+printf "\nThen push the changes to upstream\n"
diff --git a/vendor/go.opentelemetry.io/otel/propagation.go b/vendor/go.opentelemetry.io/otel/propagation.go
new file mode 100644
index 000000000..d29aaa32c
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/propagation.go
@@ -0,0 +1,31 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package otel // import "go.opentelemetry.io/otel"
+
+import (
+	"go.opentelemetry.io/otel/internal/global"
+	"go.opentelemetry.io/otel/propagation"
+)
+
+// GetTextMapPropagator returns the global TextMapPropagator. If none has been
+// set, a No-Op TextMapPropagator is returned.
+func GetTextMapPropagator() propagation.TextMapPropagator {
+	return global.TextMapPropagator()
+}
+
+// SetTextMapPropagator sets propagator as the global TextMapPropagator.
+func SetTextMapPropagator(propagator propagation.TextMapPropagator) {
+	global.SetTextMapPropagator(propagator)
+}
diff --git a/vendor/go.opentelemetry.io/otel/propagation/baggage.go b/vendor/go.opentelemetry.io/otel/propagation/baggage.go
new file mode 100644
index 000000000..16afed531
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/propagation/baggage.go
@@ -0,0 +1,58 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package propagation // import "go.opentelemetry.io/otel/propagation"
+
+import (
+	"context"
+
+	"go.opentelemetry.io/otel/baggage"
+)
+
+const baggageHeader = "baggage"
+
+// Baggage is a propagator that supports the W3C Baggage format.
+//
+// This propagates user-defined baggage associated with a trace. The complete
+// specification is defined at https://w3c.github.io/baggage/.
+type Baggage struct{}
+
+var _ TextMapPropagator = Baggage{}
+
+// Inject sets baggage key-values from ctx into the carrier.
+func (b Baggage) Inject(ctx context.Context, carrier TextMapCarrier) {
+	bStr := baggage.FromContext(ctx).String()
+	if bStr != "" {
+		carrier.Set(baggageHeader, bStr)
+	}
+}
+
+// Extract returns a copy of parent with the baggage from the carrier added.
+func (b Baggage) Extract(parent context.Context, carrier TextMapCarrier) context.Context {
+	bStr := carrier.Get(baggageHeader)
+	if bStr == "" {
+		return parent
+	}
+
+	bag, err := baggage.Parse(bStr)
+	if err != nil {
+		return parent
+	}
+	return baggage.ContextWithBaggage(parent, bag)
+}
+
+// Fields returns the keys who's values are set with Inject.
+func (b Baggage) Fields() []string {
+	return []string{baggageHeader}
+}
diff --git a/vendor/go.opentelemetry.io/otel/propagation/doc.go b/vendor/go.opentelemetry.io/otel/propagation/doc.go
new file mode 100644
index 000000000..7d56873a9
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/propagation/doc.go
@@ -0,0 +1,27 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+/*
+Package propagation contains OpenTelemetry context propagators.
+
+This package is currently in a Release Candidate phase. Backwards incompatible changes
+may be introduced prior to v1.0.0, but we believe the current API is ready to stabilize.
+
+OpenTelemetry propagators are used to extract and inject context data from and
+into messages exchanged by applications. The propagator supported by this
+package is the W3C Trace Context encoding
+(https://www.w3.org/TR/trace-context/), and W3C Baggage
+(https://w3c.github.io/baggage/).
+*/
+package propagation // import "go.opentelemetry.io/otel/propagation"
diff --git a/vendor/go.opentelemetry.io/otel/propagation/propagation.go b/vendor/go.opentelemetry.io/otel/propagation/propagation.go
new file mode 100644
index 000000000..9fb6de66c
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/propagation/propagation.go
@@ -0,0 +1,127 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package propagation // import "go.opentelemetry.io/otel/propagation"
+
+import (
+	"context"
+	"net/http"
+)
+
+// TextMapCarrier is the storage medium used by a TextMapPropagator.
+type TextMapCarrier interface {
+	// DO NOT CHANGE: any modification will not be backwards compatible and
+	// must never be done outside of a new major release.
+
+	// Get returns the value associated with the passed key.
+	Get(key string) string
+	// DO NOT CHANGE: any modification will not be backwards compatible and
+	// must never be done outside of a new major release.
+
+	// Set stores the key-value pair.
+	Set(key string, value string)
+	// DO NOT CHANGE: any modification will not be backwards compatible and
+	// must never be done outside of a new major release.
+
+	// Keys lists the keys stored in this carrier.
+	Keys() []string
+	// DO NOT CHANGE: any modification will not be backwards compatible and
+	// must never be done outside of a new major release.
+}
+
+// HeaderCarrier adapts http.Header to satisfy the TextMapCarrier interface.
+type HeaderCarrier http.Header
+
+// Get returns the value associated with the passed key.
+func (hc HeaderCarrier) Get(key string) string {
+	return http.Header(hc).Get(key)
+}
+
+// Set stores the key-value pair.
+func (hc HeaderCarrier) Set(key string, value string) {
+	http.Header(hc).Set(key, value)
+}
+
+// Keys lists the keys stored in this carrier.
+func (hc HeaderCarrier) Keys() []string {
+	keys := make([]string, 0, len(hc))
+	for k := range hc {
+		keys = append(keys, k)
+	}
+	return keys
+}
+
+// TextMapPropagator propagates cross-cutting concerns as key-value text
+// pairs within a carrier that travels in-band across process boundaries.
+type TextMapPropagator interface {
+	// DO NOT CHANGE: any modification will not be backwards compatible and
+	// must never be done outside of a new major release.
+
+	// Inject set cross-cutting concerns from the Context into the carrier.
+	Inject(ctx context.Context, carrier TextMapCarrier)
+	// DO NOT CHANGE: any modification will not be backwards compatible and
+	// must never be done outside of a new major release.
+
+	// Extract reads cross-cutting concerns from the carrier into a Context.
+	Extract(ctx context.Context, carrier TextMapCarrier) context.Context
+	// DO NOT CHANGE: any modification will not be backwards compatible and
+	// must never be done outside of a new major release.
+
+	// Fields returns the keys who's values are set with Inject.
+	Fields() []string
+	// DO NOT CHANGE: any modification will not be backwards compatible and
+	// must never be done outside of a new major release.
+}
+
+type compositeTextMapPropagator []TextMapPropagator
+
+func (p compositeTextMapPropagator) Inject(ctx context.Context, carrier TextMapCarrier) {
+	for _, i := range p {
+		i.Inject(ctx, carrier)
+	}
+}
+
+func (p compositeTextMapPropagator) Extract(ctx context.Context, carrier TextMapCarrier) context.Context {
+	for _, i := range p {
+		ctx = i.Extract(ctx, carrier)
+	}
+	return ctx
+}
+
+func (p compositeTextMapPropagator) Fields() []string {
+	unique := make(map[string]struct{})
+	for _, i := range p {
+		for _, k := range i.Fields() {
+			unique[k] = struct{}{}
+		}
+	}
+
+	fields := make([]string, 0, len(unique))
+	for k := range unique {
+		fields = append(fields, k)
+	}
+	return fields
+}
+
+// NewCompositeTextMapPropagator returns a unified TextMapPropagator from the
+// group of passed TextMapPropagator. This allows different cross-cutting
+// concerns to be propagates in a unified manner.
+//
+// The returned TextMapPropagator will inject and extract cross-cutting
+// concerns in the order the TextMapPropagators were provided. Additionally,
+// the Fields method will return a de-duplicated slice of the keys that are
+// set with the Inject method.
+func NewCompositeTextMapPropagator(p ...TextMapPropagator) TextMapPropagator {
+	return compositeTextMapPropagator(p)
+}
diff --git a/vendor/go.opentelemetry.io/otel/propagation/trace_context.go b/vendor/go.opentelemetry.io/otel/propagation/trace_context.go
new file mode 100644
index 000000000..445f81f73
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/propagation/trace_context.go
@@ -0,0 +1,157 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package propagation // import "go.opentelemetry.io/otel/propagation"
+
+import (
+	"context"
+	"encoding/hex"
+	"fmt"
+	"regexp"
+
+	"go.opentelemetry.io/otel/trace"
+)
+
+const (
+	supportedVersion  = 0
+	maxVersion        = 254
+	traceparentHeader = "traceparent"
+	tracestateHeader  = "tracestate"
+)
+
+// TraceContext is a propagator that supports the W3C Trace Context format
+// (https://www.w3.org/TR/trace-context/)
+//
+// This propagator will propagate the traceparent and tracestate headers to
+// guarantee traces are not broken. It is up to the users of this propagator
+// to choose if they want to participate in a trace by modifying the
+// traceparent header and relevant parts of the tracestate header containing
+// their proprietary information.
+type TraceContext struct{}
+
+var _ TextMapPropagator = TraceContext{}
+var traceCtxRegExp = regexp.MustCompile("^(?P<version>[0-9a-f]{2})-(?P<traceID>[a-f0-9]{32})-(?P<spanID>[a-f0-9]{16})-(?P<traceFlags>[a-f0-9]{2})(?:-.*)?$")
+
+// Inject set tracecontext from the Context into the carrier.
+func (tc TraceContext) Inject(ctx context.Context, carrier TextMapCarrier) {
+	sc := trace.SpanContextFromContext(ctx)
+	if !sc.IsValid() {
+		return
+	}
+
+	carrier.Set(tracestateHeader, sc.TraceState().String())
+
+	// Clear all flags other than the trace-context supported sampling bit.
+	flags := sc.TraceFlags() & trace.FlagsSampled
+
+	h := fmt.Sprintf("%.2x-%s-%s-%s",
+		supportedVersion,
+		sc.TraceID(),
+		sc.SpanID(),
+		flags)
+	carrier.Set(traceparentHeader, h)
+}
+
+// Extract reads tracecontext from the carrier into a returned Context.
+//
+// The returned Context will be a copy of ctx and contain the extracted
+// tracecontext as the remote SpanContext. If the extracted tracecontext is
+// invalid, the passed ctx will be returned directly instead.
+func (tc TraceContext) Extract(ctx context.Context, carrier TextMapCarrier) context.Context {
+	sc := tc.extract(carrier)
+	if !sc.IsValid() {
+		return ctx
+	}
+	return trace.ContextWithRemoteSpanContext(ctx, sc)
+}
+
+func (tc TraceContext) extract(carrier TextMapCarrier) trace.SpanContext {
+	h := carrier.Get(traceparentHeader)
+	if h == "" {
+		return trace.SpanContext{}
+	}
+
+	matches := traceCtxRegExp.FindStringSubmatch(h)
+
+	if len(matches) == 0 {
+		return trace.SpanContext{}
+	}
+
+	if len(matches) < 5 { // four subgroups plus the overall match
+		return trace.SpanContext{}
+	}
+
+	if len(matches[1]) != 2 {
+		return trace.SpanContext{}
+	}
+	ver, err := hex.DecodeString(matches[1])
+	if err != nil {
+		return trace.SpanContext{}
+	}
+	version := int(ver[0])
+	if version > maxVersion {
+		return trace.SpanContext{}
+	}
+
+	if version == 0 && len(matches) != 5 { // four subgroups plus the overall match
+		return trace.SpanContext{}
+	}
+
+	if len(matches[2]) != 32 {
+		return trace.SpanContext{}
+	}
+
+	var scc trace.SpanContextConfig
+
+	scc.TraceID, err = trace.TraceIDFromHex(matches[2][:32])
+	if err != nil {
+		return trace.SpanContext{}
+	}
+
+	if len(matches[3]) != 16 {
+		return trace.SpanContext{}
+	}
+	scc.SpanID, err = trace.SpanIDFromHex(matches[3])
+	if err != nil {
+		return trace.SpanContext{}
+	}
+
+	if len(matches[4]) != 2 {
+		return trace.SpanContext{}
+	}
+	opts, err := hex.DecodeString(matches[4])
+	if err != nil || len(opts) < 1 || (version == 0 && opts[0] > 2) {
+		return trace.SpanContext{}
+	}
+	// Clear all flags other than the trace-context supported sampling bit.
+	scc.TraceFlags = trace.TraceFlags(opts[0]) & trace.FlagsSampled
+
+	// Ignore the error returned here. Failure to parse tracestate MUST NOT
+	// affect the parsing of traceparent according to the W3C tracecontext
+	// specification.
+	scc.TraceState, _ = trace.ParseTraceState(carrier.Get(tracestateHeader))
+	scc.Remote = true
+
+	sc := trace.NewSpanContext(scc)
+	if !sc.IsValid() {
+		return trace.SpanContext{}
+	}
+
+	return sc
+}
+
+// Fields returns the keys who's values are set with Inject.
+func (tc TraceContext) Fields() []string {
+	return []string{traceparentHeader, tracestateHeader}
+}
diff --git a/vendor/go.opentelemetry.io/otel/sdk/LICENSE b/vendor/go.opentelemetry.io/otel/sdk/LICENSE
new file mode 100644
index 000000000..261eeb9e9
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/sdk/LICENSE
@@ -0,0 +1,201 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
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+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
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+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
diff --git a/vendor/go.opentelemetry.io/otel/sdk/instrumentation/library.go b/vendor/go.opentelemetry.io/otel/sdk/instrumentation/library.go
new file mode 100644
index 000000000..2c2c9923e
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/sdk/instrumentation/library.go
@@ -0,0 +1,36 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+/*
+Package instrumentation provides an instrumentation library structure to be
+passed to both the OpenTelemetry Tracer and Meter components.
+
+This package is currently in a Release Candidate phase. Backwards incompatible changes
+may be introduced prior to v1.0.0, but we believe the current API is ready to stabilize.
+
+For more information see
+[this](https://github.com/open-telemetry/oteps/blob/main/text/0083-component.md).
+*/
+package instrumentation // import "go.opentelemetry.io/otel/sdk/instrumentation"
+
+// Library represents the instrumentation library.
+type Library struct {
+	// Name is the name of the instrumentation library. This should be the
+	// Go package name of that library.
+	Name string
+	// Version is the version of the instrumentation library.
+	Version string
+	// SchemaURL of the telemetry emitted by the library.
+	SchemaURL string
+}
diff --git a/vendor/go.opentelemetry.io/otel/sdk/internal/internal.go b/vendor/go.opentelemetry.io/otel/sdk/internal/internal.go
new file mode 100644
index 000000000..84a02306e
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/sdk/internal/internal.go
@@ -0,0 +1,37 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package internal // import "go.opentelemetry.io/otel/sdk/internal"
+
+import (
+	"fmt"
+	"time"
+
+	"go.opentelemetry.io/otel"
+)
+
+// UserAgent is the user agent to be added to the outgoing
+// requests from the exporters.
+var UserAgent = fmt.Sprintf("opentelemetry-go/%s", otel.Version())
+
+// MonotonicEndTime returns the end time at present
+// but offset from start, monotonically.
+//
+// The monotonic clock is used in subtractions hence
+// the duration since start added back to start gives
+// end as a monotonic time.
+// See https://golang.org/pkg/time/#hdr-Monotonic_Clocks
+func MonotonicEndTime(start time.Time) time.Time {
+	return start.Add(time.Since(start))
+}
diff --git a/vendor/go.opentelemetry.io/otel/sdk/internal/sanitize.go b/vendor/go.opentelemetry.io/otel/sdk/internal/sanitize.go
new file mode 100644
index 000000000..e6d8b7d59
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/sdk/internal/sanitize.go
@@ -0,0 +1,50 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package internal
+
+import (
+	"strings"
+	"unicode"
+)
+
+const labelKeySizeLimit = 100
+
+// Sanitize returns a string that is trunacated to 100 characters if it's too
+// long, and replaces non-alphanumeric characters to underscores.
+func Sanitize(s string) string {
+	if len(s) == 0 {
+		return s
+	}
+	if len(s) > labelKeySizeLimit {
+		s = s[:labelKeySizeLimit]
+	}
+	s = strings.Map(sanitizeRune, s)
+	if unicode.IsDigit(rune(s[0])) {
+		s = "key_" + s
+	}
+	if s[0] == '_' {
+		s = "key" + s
+	}
+	return s
+}
+
+// converts anything that is not a letter or digit to an underscore
+func sanitizeRune(r rune) rune {
+	if unicode.IsLetter(r) || unicode.IsDigit(r) {
+		return r
+	}
+	// Everything else turns into an underscore
+	return '_'
+}
diff --git a/vendor/go.opentelemetry.io/otel/sdk/resource/auto.go b/vendor/go.opentelemetry.io/otel/sdk/resource/auto.go
new file mode 100644
index 000000000..a5eaa7e5d
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/sdk/resource/auto.go
@@ -0,0 +1,72 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package resource // import "go.opentelemetry.io/otel/sdk/resource"
+
+import (
+	"context"
+	"errors"
+	"fmt"
+)
+
+var (
+	// ErrPartialResource is returned by a detector when complete source
+	// information for a Resource is unavailable or the source information
+	// contains invalid values that are omitted from the returned Resource.
+	ErrPartialResource = errors.New("partial resource")
+)
+
+// Detector detects OpenTelemetry resource information
+type Detector interface {
+	// DO NOT CHANGE: any modification will not be backwards compatible and
+	// must never be done outside of a new major release.
+
+	// Detect returns an initialized Resource based on gathered information.
+	// If the source information to construct a Resource contains invalid
+	// values, a Resource is returned with the valid parts of the source
+	// information used for initialization along with an appropriately
+	// wrapped ErrPartialResource error.
+	Detect(ctx context.Context) (*Resource, error)
+	// DO NOT CHANGE: any modification will not be backwards compatible and
+	// must never be done outside of a new major release.
+}
+
+// Detect calls all input detectors sequentially and merges each result with the previous one.
+// It returns the merged error too.
+func Detect(ctx context.Context, detectors ...Detector) (*Resource, error) {
+	var autoDetectedRes *Resource
+	var errInfo []string
+	for _, detector := range detectors {
+		if detector == nil {
+			continue
+		}
+		res, err := detector.Detect(ctx)
+		if err != nil {
+			errInfo = append(errInfo, err.Error())
+			if !errors.Is(err, ErrPartialResource) {
+				continue
+			}
+		}
+		autoDetectedRes, err = Merge(autoDetectedRes, res)
+		if err != nil {
+			errInfo = append(errInfo, err.Error())
+		}
+	}
+
+	var aggregatedError error
+	if len(errInfo) > 0 {
+		aggregatedError = fmt.Errorf("detecting resources: %s", errInfo)
+	}
+	return autoDetectedRes, aggregatedError
+}
diff --git a/vendor/go.opentelemetry.io/otel/sdk/resource/builtin.go b/vendor/go.opentelemetry.io/otel/sdk/resource/builtin.go
new file mode 100644
index 000000000..b3365ad3c
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/sdk/resource/builtin.go
@@ -0,0 +1,107 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package resource // import "go.opentelemetry.io/otel/sdk/resource"
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"path/filepath"
+
+	"go.opentelemetry.io/otel"
+	"go.opentelemetry.io/otel/attribute"
+	semconv "go.opentelemetry.io/otel/semconv/v1.4.0"
+)
+
+type (
+	// telemetrySDK is a Detector that provides information about
+	// the OpenTelemetry SDK used.  This Detector is included as a
+	// builtin. If these resource attributes are not wanted, use
+	// the WithTelemetrySDK(nil) or WithoutBuiltin() options to
+	// explicitly disable them.
+	telemetrySDK struct{}
+
+	// host is a Detector that provides information about the host
+	// being run on. This Detector is included as a builtin. If
+	// these resource attributes are not wanted, use the
+	// WithHost(nil) or WithoutBuiltin() options to explicitly
+	// disable them.
+	host struct{}
+
+	stringDetector struct {
+		schemaURL string
+		K         attribute.Key
+		F         func() (string, error)
+	}
+
+	defaultServiceNameDetector struct{}
+)
+
+var (
+	_ Detector = telemetrySDK{}
+	_ Detector = host{}
+	_ Detector = stringDetector{}
+	_ Detector = defaultServiceNameDetector{}
+)
+
+// Detect returns a *Resource that describes the OpenTelemetry SDK used.
+func (telemetrySDK) Detect(context.Context) (*Resource, error) {
+	return NewWithAttributes(
+		semconv.SchemaURL,
+		semconv.TelemetrySDKNameKey.String("opentelemetry"),
+		semconv.TelemetrySDKLanguageKey.String("go"),
+		semconv.TelemetrySDKVersionKey.String(otel.Version()),
+	), nil
+}
+
+// Detect returns a *Resource that describes the host being run on.
+func (host) Detect(ctx context.Context) (*Resource, error) {
+	return StringDetector(semconv.SchemaURL, semconv.HostNameKey, os.Hostname).Detect(ctx)
+}
+
+// StringDetector returns a Detector that will produce a *Resource
+// containing the string as a value corresponding to k. The resulting Resource
+// will have the specified schemaURL.
+func StringDetector(schemaURL string, k attribute.Key, f func() (string, error)) Detector {
+	return stringDetector{schemaURL: schemaURL, K: k, F: f}
+}
+
+// Detect implements Detector.
+func (sd stringDetector) Detect(ctx context.Context) (*Resource, error) {
+	value, err := sd.F()
+	if err != nil {
+		return nil, fmt.Errorf("%s: %w", string(sd.K), err)
+	}
+	a := sd.K.String(value)
+	if !a.Valid() {
+		return nil, fmt.Errorf("invalid attribute: %q -> %q", a.Key, a.Value.Emit())
+	}
+	return NewWithAttributes(sd.schemaURL, sd.K.String(value)), nil
+}
+
+// Detect implements Detector
+func (defaultServiceNameDetector) Detect(ctx context.Context) (*Resource, error) {
+	return StringDetector(
+		semconv.SchemaURL,
+		semconv.ServiceNameKey,
+		func() (string, error) {
+			executable, err := os.Executable()
+			if err != nil {
+				return "unknown_service:go", nil
+			}
+			return "unknown_service:" + filepath.Base(executable), nil
+		},
+	).Detect(ctx)
+}
diff --git a/vendor/go.opentelemetry.io/otel/sdk/resource/config.go b/vendor/go.opentelemetry.io/otel/sdk/resource/config.go
new file mode 100644
index 000000000..2606de7bb
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/sdk/resource/config.go
@@ -0,0 +1,94 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package resource // import "go.opentelemetry.io/otel/sdk/resource"
+
+import (
+	"context"
+
+	"go.opentelemetry.io/otel/attribute"
+)
+
+// config contains configuration for Resource creation.
+type config struct {
+	// detectors that will be evaluated.
+	detectors []Detector
+	// SchemaURL to associate with the Resource.
+	schemaURL string
+}
+
+// Option is the interface that applies a configuration option.
+type Option interface {
+	// apply sets the Option value of a config.
+	apply(*config)
+}
+
+// WithAttributes adds attributes to the configured Resource.
+func WithAttributes(attributes ...attribute.KeyValue) Option {
+	return WithDetectors(detectAttributes{attributes})
+}
+
+type detectAttributes struct {
+	attributes []attribute.KeyValue
+}
+
+func (d detectAttributes) Detect(context.Context) (*Resource, error) {
+	return NewSchemaless(d.attributes...), nil
+}
+
+// WithDetectors adds detectors to be evaluated for the configured resource.
+func WithDetectors(detectors ...Detector) Option {
+	return detectorsOption{detectors: detectors}
+}
+
+type detectorsOption struct {
+	detectors []Detector
+}
+
+func (o detectorsOption) apply(cfg *config) {
+	cfg.detectors = append(cfg.detectors, o.detectors...)
+}
+
+// WithBuiltinDetectors adds the built detectors to the configured resource.
+func WithBuiltinDetectors() Option {
+	return WithDetectors(telemetrySDK{},
+		host{},
+		fromEnv{})
+}
+
+// WithFromEnv adds attributes from environment variables to the configured resource.
+func WithFromEnv() Option {
+	return WithDetectors(fromEnv{})
+}
+
+// WithHost adds attributes from the host to the configured resource.
+func WithHost() Option {
+	return WithDetectors(host{})
+}
+
+// WithTelemetrySDK adds TelemetrySDK version info to the configured resource.
+func WithTelemetrySDK() Option {
+	return WithDetectors(telemetrySDK{})
+}
+
+// WithSchemaURL sets the schema URL for the configured resource.
+func WithSchemaURL(schemaURL string) Option {
+	return schemaURLOption(schemaURL)
+}
+
+type schemaURLOption string
+
+func (o schemaURLOption) apply(cfg *config) {
+	cfg.schemaURL = string(o)
+}
diff --git a/vendor/go.opentelemetry.io/otel/sdk/resource/doc.go b/vendor/go.opentelemetry.io/otel/sdk/resource/doc.go
new file mode 100644
index 000000000..846d65bb1
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/sdk/resource/doc.go
@@ -0,0 +1,31 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package resource provides detecting and representing resources.
+//
+// This package is currently in a Release Candidate phase. Backwards incompatible changes
+// may be introduced prior to v1.0.0, but we believe the current API is ready to stabilize.
+//
+// The fundamental struct is a Resource which holds identifying information
+// about the entities for which telemetry is exported.
+//
+// To automatically construct Resources from an environment a Detector
+// interface is defined. Implementations of this interface can be passed to
+// the Detect function to generate a Resource from the merged information.
+//
+// To load a user defined Resource from the environment variable
+// OTEL_RESOURCE_ATTRIBUTES the FromEnv Detector can be used. It will interpret
+// the value as a list of comma delimited key/value pairs
+// (e.g. `<key1>=<value1>,<key2>=<value2>,...`).
+package resource // import "go.opentelemetry.io/otel/sdk/resource"
diff --git a/vendor/go.opentelemetry.io/otel/sdk/resource/env.go b/vendor/go.opentelemetry.io/otel/sdk/resource/env.go
new file mode 100644
index 000000000..dd6d518ba
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/sdk/resource/env.go
@@ -0,0 +1,96 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package resource // import "go.opentelemetry.io/otel/sdk/resource"
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"strings"
+
+	"go.opentelemetry.io/otel/attribute"
+	semconv "go.opentelemetry.io/otel/semconv/v1.4.0"
+)
+
+const (
+	// resourceAttrKey is the environment variable name OpenTelemetry Resource information will be read from.
+	resourceAttrKey = "OTEL_RESOURCE_ATTRIBUTES"
+
+	// svcNameKey is the environment variable name that Service Name information will be read from.
+	svcNameKey = "OTEL_SERVICE_NAME"
+)
+
+var (
+	// errMissingValue is returned when a resource value is missing.
+	errMissingValue = fmt.Errorf("%w: missing value", ErrPartialResource)
+)
+
+// fromEnv is a Detector that implements the Detector and collects
+// resources from environment.  This Detector is included as a
+// builtin.
+type fromEnv struct{}
+
+// compile time assertion that FromEnv implements Detector interface
+var _ Detector = fromEnv{}
+
+// Detect collects resources from environment
+func (fromEnv) Detect(context.Context) (*Resource, error) {
+	attrs := strings.TrimSpace(os.Getenv(resourceAttrKey))
+	svcName := strings.TrimSpace(os.Getenv(svcNameKey))
+
+	if attrs == "" && svcName == "" {
+		return Empty(), nil
+	}
+
+	var res *Resource
+
+	if svcName != "" {
+		res = NewSchemaless(semconv.ServiceNameKey.String(svcName))
+	}
+
+	r2, err := constructOTResources(attrs)
+
+	// Ensure that the resource with the service name from OTEL_SERVICE_NAME
+	// takes precedence, if it was defined.
+	res, err2 := Merge(r2, res)
+
+	if err == nil {
+		err = err2
+	} else if err2 != nil {
+		err = fmt.Errorf("detecting resources: %s", []string{err.Error(), err2.Error()})
+	}
+
+	return res, err
+}
+
+func constructOTResources(s string) (*Resource, error) {
+	pairs := strings.Split(s, ",")
+	attrs := []attribute.KeyValue{}
+	var invalid []string
+	for _, p := range pairs {
+		field := strings.SplitN(p, "=", 2)
+		if len(field) != 2 {
+			invalid = append(invalid, p)
+			continue
+		}
+		k, v := strings.TrimSpace(field[0]), strings.TrimSpace(field[1])
+		attrs = append(attrs, attribute.String(k, v))
+	}
+	var err error
+	if len(invalid) > 0 {
+		err = fmt.Errorf("%w: %v", errMissingValue, invalid)
+	}
+	return NewSchemaless(attrs...), err
+}
diff --git a/vendor/go.opentelemetry.io/otel/sdk/resource/os.go b/vendor/go.opentelemetry.io/otel/sdk/resource/os.go
new file mode 100644
index 000000000..5d267231a
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/sdk/resource/os.go
@@ -0,0 +1,40 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package resource // import "go.opentelemetry.io/otel/sdk/resource"
+
+import (
+	"context"
+	"strings"
+
+	semconv "go.opentelemetry.io/otel/semconv/v1.4.0"
+)
+
+type osTypeDetector struct{}
+
+// Detect returns a *Resource that describes the operating system type the
+// service is running on.
+func (osTypeDetector) Detect(ctx context.Context) (*Resource, error) {
+	osType := runtimeOS()
+
+	return NewWithAttributes(
+		semconv.SchemaURL,
+		semconv.OSTypeKey.String(strings.ToLower(osType)),
+	), nil
+}
+
+// WithOSType adds an attribute with the operating system type to the configured Resource.
+func WithOSType() Option {
+	return WithDetectors(osTypeDetector{})
+}
diff --git a/vendor/go.opentelemetry.io/otel/sdk/resource/process.go b/vendor/go.opentelemetry.io/otel/sdk/resource/process.go
new file mode 100644
index 000000000..171406ec5
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/sdk/resource/process.go
@@ -0,0 +1,238 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package resource // import "go.opentelemetry.io/otel/sdk/resource"
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"os/user"
+	"path/filepath"
+	"runtime"
+
+	semconv "go.opentelemetry.io/otel/semconv/v1.4.0"
+)
+
+type pidProvider func() int
+type executablePathProvider func() (string, error)
+type commandArgsProvider func() []string
+type ownerProvider func() (*user.User, error)
+type runtimeNameProvider func() string
+type runtimeVersionProvider func() string
+type runtimeOSProvider func() string
+type runtimeArchProvider func() string
+
+var (
+	defaultPidProvider            pidProvider            = os.Getpid
+	defaultExecutablePathProvider executablePathProvider = os.Executable
+	defaultCommandArgsProvider    commandArgsProvider    = func() []string { return os.Args }
+	defaultOwnerProvider          ownerProvider          = user.Current
+	defaultRuntimeNameProvider    runtimeNameProvider    = func() string { return runtime.Compiler }
+	defaultRuntimeVersionProvider runtimeVersionProvider = runtime.Version
+	defaultRuntimeOSProvider      runtimeOSProvider      = func() string { return runtime.GOOS }
+	defaultRuntimeArchProvider    runtimeArchProvider    = func() string { return runtime.GOARCH }
+)
+
+var (
+	pid            = defaultPidProvider
+	executablePath = defaultExecutablePathProvider
+	commandArgs    = defaultCommandArgsProvider
+	owner          = defaultOwnerProvider
+	runtimeName    = defaultRuntimeNameProvider
+	runtimeVersion = defaultRuntimeVersionProvider
+	runtimeOS      = defaultRuntimeOSProvider
+	runtimeArch    = defaultRuntimeArchProvider
+)
+
+func setDefaultOSProviders() {
+	setOSProviders(
+		defaultPidProvider,
+		defaultExecutablePathProvider,
+		defaultCommandArgsProvider,
+	)
+}
+
+func setOSProviders(
+	pidProvider pidProvider,
+	executablePathProvider executablePathProvider,
+	commandArgsProvider commandArgsProvider,
+) {
+	pid = pidProvider
+	executablePath = executablePathProvider
+	commandArgs = commandArgsProvider
+}
+
+func setDefaultRuntimeProviders() {
+	setRuntimeProviders(
+		defaultRuntimeNameProvider,
+		defaultRuntimeVersionProvider,
+		defaultRuntimeOSProvider,
+		defaultRuntimeArchProvider,
+	)
+}
+
+func setRuntimeProviders(
+	runtimeNameProvider runtimeNameProvider,
+	runtimeVersionProvider runtimeVersionProvider,
+	runtimeOSProvider runtimeOSProvider,
+	runtimeArchProvider runtimeArchProvider,
+) {
+	runtimeName = runtimeNameProvider
+	runtimeVersion = runtimeVersionProvider
+	runtimeOS = runtimeOSProvider
+	runtimeArch = runtimeArchProvider
+}
+
+func setDefaultUserProviders() {
+	setUserProviders(defaultOwnerProvider)
+}
+
+func setUserProviders(ownerProvider ownerProvider) {
+	owner = ownerProvider
+}
+
+type processPIDDetector struct{}
+type processExecutableNameDetector struct{}
+type processExecutablePathDetector struct{}
+type processCommandArgsDetector struct{}
+type processOwnerDetector struct{}
+type processRuntimeNameDetector struct{}
+type processRuntimeVersionDetector struct{}
+type processRuntimeDescriptionDetector struct{}
+
+// Detect returns a *Resource that describes the process identifier (PID) of the
+// executing process.
+func (processPIDDetector) Detect(ctx context.Context) (*Resource, error) {
+	return NewWithAttributes(semconv.SchemaURL, semconv.ProcessPIDKey.Int(pid())), nil
+}
+
+// Detect returns a *Resource that describes the name of the process executable.
+func (processExecutableNameDetector) Detect(ctx context.Context) (*Resource, error) {
+	executableName := filepath.Base(commandArgs()[0])
+
+	return NewWithAttributes(semconv.SchemaURL, semconv.ProcessExecutableNameKey.String(executableName)), nil
+}
+
+// Detect returns a *Resource that describes the full path of the process executable.
+func (processExecutablePathDetector) Detect(ctx context.Context) (*Resource, error) {
+	executablePath, err := executablePath()
+	if err != nil {
+		return nil, err
+	}
+
+	return NewWithAttributes(semconv.SchemaURL, semconv.ProcessExecutablePathKey.String(executablePath)), nil
+}
+
+// Detect returns a *Resource that describes all the command arguments as received
+// by the process.
+func (processCommandArgsDetector) Detect(ctx context.Context) (*Resource, error) {
+	return NewWithAttributes(semconv.SchemaURL, semconv.ProcessCommandArgsKey.Array(commandArgs())), nil
+}
+
+// Detect returns a *Resource that describes the username of the user that owns the
+// process.
+func (processOwnerDetector) Detect(ctx context.Context) (*Resource, error) {
+	owner, err := owner()
+	if err != nil {
+		return nil, err
+	}
+
+	return NewWithAttributes(semconv.SchemaURL, semconv.ProcessOwnerKey.String(owner.Username)), nil
+}
+
+// Detect returns a *Resource that describes the name of the compiler used to compile
+// this process image.
+func (processRuntimeNameDetector) Detect(ctx context.Context) (*Resource, error) {
+	return NewWithAttributes(semconv.SchemaURL, semconv.ProcessRuntimeNameKey.String(runtimeName())), nil
+}
+
+// Detect returns a *Resource that describes the version of the runtime of this process.
+func (processRuntimeVersionDetector) Detect(ctx context.Context) (*Resource, error) {
+	return NewWithAttributes(semconv.SchemaURL, semconv.ProcessRuntimeVersionKey.String(runtimeVersion())), nil
+}
+
+// Detect returns a *Resource that describes the runtime of this process.
+func (processRuntimeDescriptionDetector) Detect(ctx context.Context) (*Resource, error) {
+	runtimeDescription := fmt.Sprintf(
+		"go version %s %s/%s", runtimeVersion(), runtimeOS(), runtimeArch())
+
+	return NewWithAttributes(
+		semconv.SchemaURL,
+		semconv.ProcessRuntimeDescriptionKey.String(runtimeDescription),
+	), nil
+}
+
+// WithProcessPID adds an attribute with the process identifier (PID) to the
+// configured Resource.
+func WithProcessPID() Option {
+	return WithDetectors(processPIDDetector{})
+}
+
+// WithProcessExecutableName adds an attribute with the name of the process
+// executable to the configured Resource.
+func WithProcessExecutableName() Option {
+	return WithDetectors(processExecutableNameDetector{})
+}
+
+// WithProcessExecutablePath adds an attribute with the full path to the process
+// executable to the configured Resource.
+func WithProcessExecutablePath() Option {
+	return WithDetectors(processExecutablePathDetector{})
+}
+
+// WithProcessCommandArgs adds an attribute with all the command arguments (including
+// the command/executable itself) as received by the process the configured Resource.
+func WithProcessCommandArgs() Option {
+	return WithDetectors(processCommandArgsDetector{})
+}
+
+// WithProcessOwner adds an attribute with the username of the user that owns the process
+// to the configured Resource.
+func WithProcessOwner() Option {
+	return WithDetectors(processOwnerDetector{})
+}
+
+// WithProcessRuntimeName adds an attribute with the name of the runtime of this
+// process to the configured Resource.
+func WithProcessRuntimeName() Option {
+	return WithDetectors(processRuntimeNameDetector{})
+}
+
+// WithProcessRuntimeVersion adds an attribute with the version of the runtime of
+// this process to the configured Resource.
+func WithProcessRuntimeVersion() Option {
+	return WithDetectors(processRuntimeVersionDetector{})
+}
+
+// WithProcessRuntimeDescription adds an attribute with an additional description
+// about the runtime of the process to the configured Resource.
+func WithProcessRuntimeDescription() Option {
+	return WithDetectors(processRuntimeDescriptionDetector{})
+}
+
+// WithProcess adds all the Process attributes to the configured Resource.
+// See individual WithProcess* functions to configure specific attributes.
+func WithProcess() Option {
+	return WithDetectors(
+		processPIDDetector{},
+		processExecutableNameDetector{},
+		processExecutablePathDetector{},
+		processCommandArgsDetector{},
+		processOwnerDetector{},
+		processRuntimeNameDetector{},
+		processRuntimeVersionDetector{},
+		processRuntimeDescriptionDetector{},
+	)
+}
diff --git a/vendor/go.opentelemetry.io/otel/sdk/resource/resource.go b/vendor/go.opentelemetry.io/otel/sdk/resource/resource.go
new file mode 100644
index 000000000..94b11c6c0
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/sdk/resource/resource.go
@@ -0,0 +1,256 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package resource // import "go.opentelemetry.io/otel/sdk/resource"
+
+import (
+	"context"
+	"errors"
+	"fmt"
+
+	"go.opentelemetry.io/otel"
+	"go.opentelemetry.io/otel/attribute"
+)
+
+// Resource describes an entity about which identifying information
+// and metadata is exposed.  Resource is an immutable object,
+// equivalent to a map from key to unique value.
+//
+// Resources should be passed and stored as pointers
+// (`*resource.Resource`).  The `nil` value is equivalent to an empty
+// Resource.
+type Resource struct {
+	attrs     attribute.Set
+	schemaURL string
+}
+
+var (
+	emptyResource Resource
+
+	defaultResource = func(r *Resource, err error) *Resource {
+		if err != nil {
+			otel.Handle(err)
+		}
+		return r
+	}(Detect(context.Background(), defaultServiceNameDetector{}, fromEnv{}, telemetrySDK{}))
+)
+
+var (
+	errMergeConflictSchemaURL = errors.New("cannot merge resource due to conflicting Schema URL")
+)
+
+// New returns a Resource combined from the user-provided detectors.
+func New(ctx context.Context, opts ...Option) (*Resource, error) {
+	cfg := config{}
+	for _, opt := range opts {
+		opt.apply(&cfg)
+	}
+
+	resource, err := Detect(ctx, cfg.detectors...)
+
+	var err2 error
+	resource, err2 = Merge(resource, &Resource{schemaURL: cfg.schemaURL})
+	if err == nil {
+		err = err2
+	} else if err2 != nil {
+		err = fmt.Errorf("detecting resources: %s", []string{err.Error(), err2.Error()})
+	}
+
+	return resource, err
+}
+
+// NewWithAttributes creates a resource from attrs and associates the resource with a
+// schema URL. If attrs contains duplicate keys, the last value will be used. If attrs
+// contains any invalid items those items will be dropped. The attrs are assumed to be
+// in a schema identified by schemaURL.
+func NewWithAttributes(schemaURL string, attrs ...attribute.KeyValue) *Resource {
+	resource := NewSchemaless(attrs...)
+	resource.schemaURL = schemaURL
+	return resource
+}
+
+// NewSchemaless creates a resource from attrs. If attrs contains duplicate keys,
+// the last value will be used. If attrs contains any invalid items those items will
+// be dropped. The resource will not be associated with a schema URL. If the schema
+// of the attrs is known use NewWithAttributes instead.
+func NewSchemaless(attrs ...attribute.KeyValue) *Resource {
+	if len(attrs) == 0 {
+		return &emptyResource
+	}
+
+	// Ensure attributes comply with the specification:
+	// https://github.com/open-telemetry/opentelemetry-specification/blob/v1.0.1/specification/common/common.md#attributes
+	s, _ := attribute.NewSetWithFiltered(attrs, func(kv attribute.KeyValue) bool {
+		return kv.Valid()
+	})
+
+	// If attrs only contains invalid entries do not allocate a new resource.
+	if s.Len() == 0 {
+		return &emptyResource
+	}
+
+	return &Resource{attrs: s} //nolint
+}
+
+// String implements the Stringer interface and provides a
+// human-readable form of the resource.
+//
+// Avoid using this representation as the key in a map of resources,
+// use Equivalent() as the key instead.
+func (r *Resource) String() string {
+	if r == nil {
+		return ""
+	}
+	return r.attrs.Encoded(attribute.DefaultEncoder())
+}
+
+// Attributes returns a copy of attributes from the resource in a sorted order.
+// To avoid allocating a new slice, use an iterator.
+func (r *Resource) Attributes() []attribute.KeyValue {
+	if r == nil {
+		r = Empty()
+	}
+	return r.attrs.ToSlice()
+}
+
+func (r *Resource) SchemaURL() string {
+	return r.schemaURL
+}
+
+// Iter returns an interator of the Resource attributes.
+// This is ideal to use if you do not want a copy of the attributes.
+func (r *Resource) Iter() attribute.Iterator {
+	if r == nil {
+		r = Empty()
+	}
+	return r.attrs.Iter()
+}
+
+// Equal returns true when a Resource is equivalent to this Resource.
+func (r *Resource) Equal(eq *Resource) bool {
+	if r == nil {
+		r = Empty()
+	}
+	if eq == nil {
+		eq = Empty()
+	}
+	return r.Equivalent() == eq.Equivalent()
+}
+
+// Merge creates a new resource by combining resource a and b.
+//
+// If there are common keys between resource a and b, then the value
+// from resource b will overwrite the value from resource a, even
+// if resource b's value is empty.
+//
+// The SchemaURL of the resources will be merged according to the spec rules:
+// https://github.com/open-telemetry/opentelemetry-specification/blob/bad49c714a62da5493f2d1d9bafd7ebe8c8ce7eb/specification/resource/sdk.md#merge
+// If the resources have different non-empty schemaURL an empty resource and an error
+// will be returned.
+func Merge(a, b *Resource) (*Resource, error) {
+	if a == nil && b == nil {
+		return Empty(), nil
+	}
+	if a == nil {
+		return b, nil
+	}
+	if b == nil {
+		return a, nil
+	}
+
+	// Merge the schema URL.
+	var schemaURL string
+	if a.schemaURL == "" {
+		schemaURL = b.schemaURL
+	} else if b.schemaURL == "" {
+		schemaURL = a.schemaURL
+	} else if a.schemaURL == b.schemaURL {
+		schemaURL = a.schemaURL
+	} else {
+		return Empty(), errMergeConflictSchemaURL
+	}
+
+	// Note: 'b' attributes will overwrite 'a' with last-value-wins in attribute.Key()
+	// Meaning this is equivalent to: append(a.Attributes(), b.Attributes()...)
+	mi := attribute.NewMergeIterator(b.Set(), a.Set())
+	combine := make([]attribute.KeyValue, 0, a.Len()+b.Len())
+	for mi.Next() {
+		combine = append(combine, mi.Label())
+	}
+	merged := NewWithAttributes(schemaURL, combine...)
+	return merged, nil
+}
+
+// Empty returns an instance of Resource with no attributes.  It is
+// equivalent to a `nil` Resource.
+func Empty() *Resource {
+	return &emptyResource
+}
+
+// Default returns an instance of Resource with a default
+// "service.name" and OpenTelemetrySDK attributes
+func Default() *Resource {
+	return defaultResource
+}
+
+// Environment returns an instance of Resource with attributes
+// extracted from the OTEL_RESOURCE_ATTRIBUTES environment variable.
+func Environment() *Resource {
+	detector := &fromEnv{}
+	resource, err := detector.Detect(context.Background())
+	if err != nil {
+		otel.Handle(err)
+	}
+	return resource
+}
+
+// Equivalent returns an object that can be compared for equality
+// between two resources.  This value is suitable for use as a key in
+// a map.
+func (r *Resource) Equivalent() attribute.Distinct {
+	return r.Set().Equivalent()
+}
+
+// Set returns the equivalent *attribute.Set of this resources attributes.
+func (r *Resource) Set() *attribute.Set {
+	if r == nil {
+		r = Empty()
+	}
+	return &r.attrs
+}
+
+// MarshalJSON encodes the resource attributes as a JSON list of { "Key":
+// "...", "Value": ... } pairs in order sorted by key.
+func (r *Resource) MarshalJSON() ([]byte, error) {
+	if r == nil {
+		r = Empty()
+	}
+	return r.attrs.MarshalJSON()
+}
+
+// Len returns the number of unique key-values in this Resource.
+func (r *Resource) Len() int {
+	if r == nil {
+		return 0
+	}
+	return r.attrs.Len()
+}
+
+// Encoded returns an encoded representation of the resource.
+func (r *Resource) Encoded(enc attribute.Encoder) string {
+	if r == nil {
+		return ""
+	}
+	return r.attrs.Encoded(enc)
+}
diff --git a/vendor/go.opentelemetry.io/otel/sdk/trace/attributesmap.go b/vendor/go.opentelemetry.io/otel/sdk/trace/attributesmap.go
new file mode 100644
index 000000000..b891c8178
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/sdk/trace/attributesmap.go
@@ -0,0 +1,91 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package trace // import "go.opentelemetry.io/otel/sdk/trace"
+
+import (
+	"container/list"
+
+	"go.opentelemetry.io/otel/attribute"
+)
+
+// attributesMap is a capped map of attributes, holding the most recent attributes.
+// Eviction is done via a LRU method, the oldest entry is removed to create room for a new entry.
+// Updates are allowed and they refresh the usage of the key.
+//
+// This is based from https://github.com/hashicorp/golang-lru/blob/master/simplelru/lru.go
+// With a subset of the its operations and specific for holding attribute.KeyValue
+type attributesMap struct {
+	attributes   map[attribute.Key]*list.Element
+	evictList    *list.List
+	droppedCount int
+	capacity     int
+}
+
+func newAttributesMap(capacity int) *attributesMap {
+	lm := &attributesMap{
+		attributes: make(map[attribute.Key]*list.Element),
+		evictList:  list.New(),
+		capacity:   capacity,
+	}
+	return lm
+}
+
+func (am *attributesMap) add(kv attribute.KeyValue) {
+	// Check for existing item
+	if ent, ok := am.attributes[kv.Key]; ok {
+		am.evictList.MoveToFront(ent)
+		ent.Value = &kv
+		return
+	}
+
+	// Add new item
+	entry := am.evictList.PushFront(&kv)
+	am.attributes[kv.Key] = entry
+
+	// Verify size not exceeded
+	if am.evictList.Len() > am.capacity {
+		am.removeOldest()
+		am.droppedCount++
+	}
+}
+
+// toKeyValue copies the attributesMap into a slice of attribute.KeyValue and
+// returns it. If the map is empty, a nil is returned.
+// TODO: Is it more efficient to return a pointer to the slice?
+func (am *attributesMap) toKeyValue() []attribute.KeyValue {
+	len := am.evictList.Len()
+	if len == 0 {
+		return nil
+	}
+
+	attributes := make([]attribute.KeyValue, 0, len)
+	for ent := am.evictList.Back(); ent != nil; ent = ent.Prev() {
+		if value, ok := ent.Value.(*attribute.KeyValue); ok {
+			attributes = append(attributes, *value)
+		}
+	}
+
+	return attributes
+}
+
+// removeOldest removes the oldest item from the cache.
+func (am *attributesMap) removeOldest() {
+	ent := am.evictList.Back()
+	if ent != nil {
+		am.evictList.Remove(ent)
+		kv := ent.Value.(*attribute.KeyValue)
+		delete(am.attributes, kv.Key)
+	}
+}
diff --git a/vendor/go.opentelemetry.io/otel/sdk/trace/batch_span_processor.go b/vendor/go.opentelemetry.io/otel/sdk/trace/batch_span_processor.go
new file mode 100644
index 000000000..db873c16f
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/sdk/trace/batch_span_processor.go
@@ -0,0 +1,334 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package trace // import "go.opentelemetry.io/otel/sdk/trace"
+
+import (
+	"context"
+	"runtime"
+	"sync"
+	"sync/atomic"
+	"time"
+
+	"go.opentelemetry.io/otel"
+)
+
+// Defaults for BatchSpanProcessorOptions.
+const (
+	DefaultMaxQueueSize       = 2048
+	DefaultBatchTimeout       = 5000 * time.Millisecond
+	DefaultExportTimeout      = 30000 * time.Millisecond
+	DefaultMaxExportBatchSize = 512
+)
+
+type BatchSpanProcessorOption func(o *BatchSpanProcessorOptions)
+
+type BatchSpanProcessorOptions struct {
+	// MaxQueueSize is the maximum queue size to buffer spans for delayed processing. If the
+	// queue gets full it drops the spans. Use BlockOnQueueFull to change this behavior.
+	// The default value of MaxQueueSize is 2048.
+	MaxQueueSize int
+
+	// BatchTimeout is the maximum duration for constructing a batch. Processor
+	// forcefully sends available spans when timeout is reached.
+	// The default value of BatchTimeout is 5000 msec.
+	BatchTimeout time.Duration
+
+	// ExportTimeout specifies the maximum duration for exporting spans. If the timeout
+	// is reached, the export will be cancelled.
+	// The default value of ExportTimeout is 30000 msec.
+	ExportTimeout time.Duration
+
+	// MaxExportBatchSize is the maximum number of spans to process in a single batch.
+	// If there are more than one batch worth of spans then it processes multiple batches
+	// of spans one batch after the other without any delay.
+	// The default value of MaxExportBatchSize is 512.
+	MaxExportBatchSize int
+
+	// BlockOnQueueFull blocks onEnd() and onStart() method if the queue is full
+	// AND if BlockOnQueueFull is set to true.
+	// Blocking option should be used carefully as it can severely affect the performance of an
+	// application.
+	BlockOnQueueFull bool
+}
+
+// batchSpanProcessor is a SpanProcessor that batches asynchronously-received
+// spans and sends them to a trace.Exporter when complete.
+type batchSpanProcessor struct {
+	e SpanExporter
+	o BatchSpanProcessorOptions
+
+	queue   chan ReadOnlySpan
+	dropped uint32
+
+	batch      []ReadOnlySpan
+	batchMutex sync.Mutex
+	timer      *time.Timer
+	stopWait   sync.WaitGroup
+	stopOnce   sync.Once
+	stopCh     chan struct{}
+}
+
+var _ SpanProcessor = (*batchSpanProcessor)(nil)
+
+// NewBatchSpanProcessor creates a new SpanProcessor that will send completed
+// span batches to the exporter with the supplied options.
+//
+// If the exporter is nil, the span processor will preform no action.
+func NewBatchSpanProcessor(exporter SpanExporter, options ...BatchSpanProcessorOption) SpanProcessor {
+	o := BatchSpanProcessorOptions{
+		BatchTimeout:       DefaultBatchTimeout,
+		ExportTimeout:      DefaultExportTimeout,
+		MaxQueueSize:       DefaultMaxQueueSize,
+		MaxExportBatchSize: DefaultMaxExportBatchSize,
+	}
+	for _, opt := range options {
+		opt(&o)
+	}
+	bsp := &batchSpanProcessor{
+		e:      exporter,
+		o:      o,
+		batch:  make([]ReadOnlySpan, 0, o.MaxExportBatchSize),
+		timer:  time.NewTimer(o.BatchTimeout),
+		queue:  make(chan ReadOnlySpan, o.MaxQueueSize),
+		stopCh: make(chan struct{}),
+	}
+
+	bsp.stopWait.Add(1)
+	go func() {
+		defer bsp.stopWait.Done()
+		bsp.processQueue()
+		bsp.drainQueue()
+	}()
+
+	return bsp
+}
+
+// OnStart method does nothing.
+func (bsp *batchSpanProcessor) OnStart(parent context.Context, s ReadWriteSpan) {}
+
+// OnEnd method enqueues a ReadOnlySpan for later processing.
+func (bsp *batchSpanProcessor) OnEnd(s ReadOnlySpan) {
+	// Do not enqueue spans if we are just going to drop them.
+	if bsp.e == nil {
+		return
+	}
+	bsp.enqueue(s)
+}
+
+// Shutdown flushes the queue and waits until all spans are processed.
+// It only executes once. Subsequent call does nothing.
+func (bsp *batchSpanProcessor) Shutdown(ctx context.Context) error {
+	var err error
+	bsp.stopOnce.Do(func() {
+		wait := make(chan struct{})
+		go func() {
+			close(bsp.stopCh)
+			bsp.stopWait.Wait()
+			if bsp.e != nil {
+				if err := bsp.e.Shutdown(ctx); err != nil {
+					otel.Handle(err)
+				}
+			}
+			close(wait)
+		}()
+		// Wait until the wait group is done or the context is cancelled
+		select {
+		case <-wait:
+		case <-ctx.Done():
+			err = ctx.Err()
+		}
+	})
+	return err
+}
+
+// ForceFlush exports all ended spans that have not yet been exported.
+func (bsp *batchSpanProcessor) ForceFlush(ctx context.Context) error {
+	var err error
+	if bsp.e != nil {
+		wait := make(chan error)
+		go func() {
+			wait <- bsp.exportSpans(ctx)
+			close(wait)
+		}()
+		// Wait until the export is finished or the context is cancelled/timed out
+		select {
+		case err = <-wait:
+		case <-ctx.Done():
+			err = ctx.Err()
+		}
+	}
+	return err
+}
+
+func WithMaxQueueSize(size int) BatchSpanProcessorOption {
+	return func(o *BatchSpanProcessorOptions) {
+		o.MaxQueueSize = size
+	}
+}
+
+func WithMaxExportBatchSize(size int) BatchSpanProcessorOption {
+	return func(o *BatchSpanProcessorOptions) {
+		o.MaxExportBatchSize = size
+	}
+}
+
+func WithBatchTimeout(delay time.Duration) BatchSpanProcessorOption {
+	return func(o *BatchSpanProcessorOptions) {
+		o.BatchTimeout = delay
+	}
+}
+
+func WithExportTimeout(timeout time.Duration) BatchSpanProcessorOption {
+	return func(o *BatchSpanProcessorOptions) {
+		o.ExportTimeout = timeout
+	}
+}
+
+func WithBlocking() BatchSpanProcessorOption {
+	return func(o *BatchSpanProcessorOptions) {
+		o.BlockOnQueueFull = true
+	}
+}
+
+// exportSpans is a subroutine of processing and draining the queue.
+func (bsp *batchSpanProcessor) exportSpans(ctx context.Context) error {
+	bsp.timer.Reset(bsp.o.BatchTimeout)
+
+	bsp.batchMutex.Lock()
+	defer bsp.batchMutex.Unlock()
+
+	if bsp.o.ExportTimeout > 0 {
+		var cancel context.CancelFunc
+		ctx, cancel = context.WithTimeout(ctx, bsp.o.ExportTimeout)
+		defer cancel()
+	}
+
+	if l := len(bsp.batch); l > 0 {
+		err := bsp.e.ExportSpans(ctx, bsp.batch)
+
+		// A new batch is always created after exporting, even if the batch failed to be exported.
+		//
+		// It is up to the exporter to implement any type of retry logic if a batch is failing
+		// to be exported, since it is specific to the protocol and backend being sent to.
+		bsp.batch = bsp.batch[:0]
+
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// processQueue removes spans from the `queue` channel until processor
+// is shut down. It calls the exporter in batches of up to MaxExportBatchSize
+// waiting up to BatchTimeout to form a batch.
+func (bsp *batchSpanProcessor) processQueue() {
+	defer bsp.timer.Stop()
+
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+	for {
+		select {
+		case <-bsp.stopCh:
+			return
+		case <-bsp.timer.C:
+			if err := bsp.exportSpans(ctx); err != nil {
+				otel.Handle(err)
+			}
+		case sd := <-bsp.queue:
+			bsp.batchMutex.Lock()
+			bsp.batch = append(bsp.batch, sd)
+			shouldExport := len(bsp.batch) >= bsp.o.MaxExportBatchSize
+			bsp.batchMutex.Unlock()
+			if shouldExport {
+				if !bsp.timer.Stop() {
+					<-bsp.timer.C
+				}
+				if err := bsp.exportSpans(ctx); err != nil {
+					otel.Handle(err)
+				}
+			}
+		}
+	}
+}
+
+// drainQueue awaits the any caller that had added to bsp.stopWait
+// to finish the enqueue, then exports the final batch.
+func (bsp *batchSpanProcessor) drainQueue() {
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+	for {
+		select {
+		case sd := <-bsp.queue:
+			if sd == nil {
+				if err := bsp.exportSpans(ctx); err != nil {
+					otel.Handle(err)
+				}
+				return
+			}
+
+			bsp.batchMutex.Lock()
+			bsp.batch = append(bsp.batch, sd)
+			shouldExport := len(bsp.batch) == bsp.o.MaxExportBatchSize
+			bsp.batchMutex.Unlock()
+
+			if shouldExport {
+				if err := bsp.exportSpans(ctx); err != nil {
+					otel.Handle(err)
+				}
+			}
+		default:
+			close(bsp.queue)
+		}
+	}
+}
+
+func (bsp *batchSpanProcessor) enqueue(sd ReadOnlySpan) {
+	if !sd.SpanContext().IsSampled() {
+		return
+	}
+
+	// This ensures the bsp.queue<- below does not panic as the
+	// processor shuts down.
+	defer func() {
+		x := recover()
+		switch err := x.(type) {
+		case nil:
+			return
+		case runtime.Error:
+			if err.Error() == "send on closed channel" {
+				return
+			}
+		}
+		panic(x)
+	}()
+
+	select {
+	case <-bsp.stopCh:
+		return
+	default:
+	}
+
+	if bsp.o.BlockOnQueueFull {
+		bsp.queue <- sd
+		return
+	}
+
+	select {
+	case bsp.queue <- sd:
+	default:
+		atomic.AddUint32(&bsp.dropped, 1)
+	}
+}
diff --git a/vendor/go.opentelemetry.io/otel/sdk/trace/config.go b/vendor/go.opentelemetry.io/otel/sdk/trace/config.go
new file mode 100644
index 000000000..61a304392
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/sdk/trace/config.go
@@ -0,0 +1,68 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package trace // import "go.opentelemetry.io/otel/sdk/trace"
+
+// SpanLimits represents the limits of a span.
+type SpanLimits struct {
+	// AttributeCountLimit is the maximum allowed span attribute count.
+	AttributeCountLimit int
+
+	// EventCountLimit is the maximum allowed span event count.
+	EventCountLimit int
+
+	// LinkCountLimit is the maximum allowed span link count.
+	LinkCountLimit int
+
+	// AttributePerEventCountLimit is the maximum allowed attribute per span event count.
+	AttributePerEventCountLimit int
+
+	// AttributePerLinkCountLimit is the maximum allowed attribute per span link count.
+	AttributePerLinkCountLimit int
+}
+
+func (sl *SpanLimits) ensureDefault() {
+	if sl.EventCountLimit <= 0 {
+		sl.EventCountLimit = DefaultEventCountLimit
+	}
+	if sl.AttributeCountLimit <= 0 {
+		sl.AttributeCountLimit = DefaultAttributeCountLimit
+	}
+	if sl.LinkCountLimit <= 0 {
+		sl.LinkCountLimit = DefaultLinkCountLimit
+	}
+	if sl.AttributePerEventCountLimit <= 0 {
+		sl.AttributePerEventCountLimit = DefaultAttributePerEventCountLimit
+	}
+	if sl.AttributePerLinkCountLimit <= 0 {
+		sl.AttributePerLinkCountLimit = DefaultAttributePerLinkCountLimit
+	}
+}
+
+const (
+	// DefaultAttributeCountLimit is the default maximum allowed span attribute count.
+	DefaultAttributeCountLimit = 128
+
+	// DefaultEventCountLimit is the default maximum allowed span event count.
+	DefaultEventCountLimit = 128
+
+	// DefaultLinkCountLimit is the default maximum allowed span link count.
+	DefaultLinkCountLimit = 128
+
+	// DefaultAttributePerEventCountLimit is the default maximum allowed attribute per span event count.
+	DefaultAttributePerEventCountLimit = 128
+
+	// DefaultAttributePerLinkCountLimit is the default maximum allowed attribute per span link count.
+	DefaultAttributePerLinkCountLimit = 128
+)
diff --git a/vendor/go.opentelemetry.io/otel/sdk/trace/doc.go b/vendor/go.opentelemetry.io/otel/sdk/trace/doc.go
new file mode 100644
index 000000000..70212916f
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/sdk/trace/doc.go
@@ -0,0 +1,24 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+/*
+Package trace contains support for OpenTelemetry distributed tracing.
+
+This package is currently in a Release Candidate phase. Backwards incompatible changes
+may be introduced prior to v1.0.0, but we believe the current API is ready to stabilize.
+
+The following assumes a basic familiarity with OpenTelemetry concepts.
+See https://opentelemetry.io.
+*/
+package trace // import "go.opentelemetry.io/otel/sdk/trace"
diff --git a/vendor/go.opentelemetry.io/otel/sdk/trace/event.go b/vendor/go.opentelemetry.io/otel/sdk/trace/event.go
new file mode 100644
index 000000000..4eb556c53
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/sdk/trace/event.go
@@ -0,0 +1,37 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package trace
+
+import (
+	"time"
+
+	"go.opentelemetry.io/otel/attribute"
+)
+
+// Event is a thing that happened during a Span's lifetime.
+type Event struct {
+	// Name is the name of this event
+	Name string
+
+	// Attributes describe the aspects of the event.
+	Attributes []attribute.KeyValue
+
+	// DroppedAttributeCount is the number of attributes that were not
+	// recorded due to configured limits being reached.
+	DroppedAttributeCount int
+
+	// Time at which this event was recorded.
+	Time time.Time
+}
diff --git a/vendor/go.opentelemetry.io/otel/sdk/trace/evictedqueue.go b/vendor/go.opentelemetry.io/otel/sdk/trace/evictedqueue.go
new file mode 100644
index 000000000..3c5817a6a
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/sdk/trace/evictedqueue.go
@@ -0,0 +1,38 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package trace // import "go.opentelemetry.io/otel/sdk/trace"
+
+type evictedQueue struct {
+	queue        []interface{}
+	capacity     int
+	droppedCount int
+}
+
+func newEvictedQueue(capacity int) *evictedQueue {
+	eq := &evictedQueue{
+		capacity: capacity,
+		queue:    make([]interface{}, 0),
+	}
+
+	return eq
+}
+
+func (eq *evictedQueue) add(value interface{}) {
+	if len(eq.queue) == eq.capacity {
+		eq.queue = eq.queue[1:]
+		eq.droppedCount++
+	}
+	eq.queue = append(eq.queue, value)
+}
diff --git a/vendor/go.opentelemetry.io/otel/sdk/trace/id_generator.go b/vendor/go.opentelemetry.io/otel/sdk/trace/id_generator.go
new file mode 100644
index 000000000..c9e2802ac
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/sdk/trace/id_generator.go
@@ -0,0 +1,77 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package trace // import "go.opentelemetry.io/otel/sdk/trace"
+
+import (
+	"context"
+	crand "crypto/rand"
+	"encoding/binary"
+	"math/rand"
+	"sync"
+
+	"go.opentelemetry.io/otel/trace"
+)
+
+// IDGenerator allows custom generators for TraceID and SpanID.
+type IDGenerator interface {
+	// DO NOT CHANGE: any modification will not be backwards compatible and
+	// must never be done outside of a new major release.
+
+	// NewIDs returns a new trace and span ID.
+	NewIDs(ctx context.Context) (trace.TraceID, trace.SpanID)
+	// DO NOT CHANGE: any modification will not be backwards compatible and
+	// must never be done outside of a new major release.
+
+	// NewSpanID returns a ID for a new span in the trace with traceID.
+	NewSpanID(ctx context.Context, traceID trace.TraceID) trace.SpanID
+	// DO NOT CHANGE: any modification will not be backwards compatible and
+	// must never be done outside of a new major release.
+}
+
+type randomIDGenerator struct {
+	sync.Mutex
+	randSource *rand.Rand
+}
+
+var _ IDGenerator = &randomIDGenerator{}
+
+// NewSpanID returns a non-zero span ID from a randomly-chosen sequence.
+func (gen *randomIDGenerator) NewSpanID(ctx context.Context, traceID trace.TraceID) trace.SpanID {
+	gen.Lock()
+	defer gen.Unlock()
+	sid := trace.SpanID{}
+	gen.randSource.Read(sid[:])
+	return sid
+}
+
+// NewIDs returns a non-zero trace ID and a non-zero span ID from a
+// randomly-chosen sequence.
+func (gen *randomIDGenerator) NewIDs(ctx context.Context) (trace.TraceID, trace.SpanID) {
+	gen.Lock()
+	defer gen.Unlock()
+	tid := trace.TraceID{}
+	gen.randSource.Read(tid[:])
+	sid := trace.SpanID{}
+	gen.randSource.Read(sid[:])
+	return tid, sid
+}
+
+func defaultIDGenerator() IDGenerator {
+	gen := &randomIDGenerator{}
+	var rngSeed int64
+	_ = binary.Read(crand.Reader, binary.LittleEndian, &rngSeed)
+	gen.randSource = rand.New(rand.NewSource(rngSeed))
+	return gen
+}
diff --git a/vendor/go.opentelemetry.io/otel/sdk/trace/provider.go b/vendor/go.opentelemetry.io/otel/sdk/trace/provider.go
new file mode 100644
index 000000000..3a32445bc
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/sdk/trace/provider.go
@@ -0,0 +1,345 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package trace // import "go.opentelemetry.io/otel/sdk/trace"
+
+import (
+	"context"
+	"fmt"
+	"sync"
+	"sync/atomic"
+
+	"go.opentelemetry.io/otel"
+	"go.opentelemetry.io/otel/trace"
+
+	"go.opentelemetry.io/otel/sdk/instrumentation"
+	"go.opentelemetry.io/otel/sdk/resource"
+)
+
+const (
+	defaultTracerName = "go.opentelemetry.io/otel/sdk/tracer"
+)
+
+// tracerProviderConfig
+type tracerProviderConfig struct {
+	// processors contains collection of SpanProcessors that are processing pipeline
+	// for spans in the trace signal.
+	// SpanProcessors registered with a TracerProvider and are called at the start
+	// and end of a Span's lifecycle, and are called in the order they are
+	// registered.
+	processors []SpanProcessor
+
+	// sampler is the default sampler used when creating new spans.
+	sampler Sampler
+
+	// idGenerator is used to generate all Span and Trace IDs when needed.
+	idGenerator IDGenerator
+
+	// spanLimits defines the attribute, event, and link limits for spans.
+	spanLimits SpanLimits
+
+	// resource contains attributes representing an entity that produces telemetry.
+	resource *resource.Resource
+}
+
+type TracerProvider struct {
+	mu             sync.Mutex
+	namedTracer    map[instrumentation.Library]*tracer
+	spanProcessors atomic.Value
+	sampler        Sampler
+	idGenerator    IDGenerator
+	spanLimits     SpanLimits
+	resource       *resource.Resource
+}
+
+var _ trace.TracerProvider = &TracerProvider{}
+
+// NewTracerProvider returns a new and configured TracerProvider.
+//
+// By default the returned TracerProvider is configured with:
+//  - a ParentBased(AlwaysSample) Sampler
+//  - a random number IDGenerator
+//  - the resource.Default() Resource
+//  - the default SpanLimits.
+//
+// The passed opts are used to override these default values and configure the
+// returned TracerProvider appropriately.
+func NewTracerProvider(opts ...TracerProviderOption) *TracerProvider {
+	o := &tracerProviderConfig{}
+
+	for _, opt := range opts {
+		opt.apply(o)
+	}
+
+	ensureValidTracerProviderConfig(o)
+
+	tp := &TracerProvider{
+		namedTracer: make(map[instrumentation.Library]*tracer),
+		sampler:     o.sampler,
+		idGenerator: o.idGenerator,
+		spanLimits:  o.spanLimits,
+		resource:    o.resource,
+	}
+
+	for _, sp := range o.processors {
+		tp.RegisterSpanProcessor(sp)
+	}
+
+	return tp
+}
+
+// Tracer returns a Tracer with the given name and options. If a Tracer for
+// the given name and options does not exist it is created, otherwise the
+// existing Tracer is returned.
+//
+// If name is empty, DefaultTracerName is used instead.
+//
+// This method is safe to be called concurrently.
+func (p *TracerProvider) Tracer(name string, opts ...trace.TracerOption) trace.Tracer {
+	c := trace.NewTracerConfig(opts...)
+
+	p.mu.Lock()
+	defer p.mu.Unlock()
+	if name == "" {
+		name = defaultTracerName
+	}
+	il := instrumentation.Library{
+		Name:      name,
+		Version:   c.InstrumentationVersion(),
+		SchemaURL: c.SchemaURL(),
+	}
+	t, ok := p.namedTracer[il]
+	if !ok {
+		t = &tracer{
+			provider:               p,
+			instrumentationLibrary: il,
+		}
+		p.namedTracer[il] = t
+	}
+	return t
+}
+
+// RegisterSpanProcessor adds the given SpanProcessor to the list of SpanProcessors
+func (p *TracerProvider) RegisterSpanProcessor(s SpanProcessor) {
+	p.mu.Lock()
+	defer p.mu.Unlock()
+	new := spanProcessorStates{}
+	if old, ok := p.spanProcessors.Load().(spanProcessorStates); ok {
+		new = append(new, old...)
+	}
+	newSpanSync := &spanProcessorState{
+		sp:    s,
+		state: &sync.Once{},
+	}
+	new = append(new, newSpanSync)
+	p.spanProcessors.Store(new)
+}
+
+// UnregisterSpanProcessor removes the given SpanProcessor from the list of SpanProcessors
+func (p *TracerProvider) UnregisterSpanProcessor(s SpanProcessor) {
+	p.mu.Lock()
+	defer p.mu.Unlock()
+	spss := spanProcessorStates{}
+	old, ok := p.spanProcessors.Load().(spanProcessorStates)
+	if !ok || len(old) == 0 {
+		return
+	}
+	spss = append(spss, old...)
+
+	// stop the span processor if it is started and remove it from the list
+	var stopOnce *spanProcessorState
+	var idx int
+	for i, sps := range spss {
+		if sps.sp == s {
+			stopOnce = sps
+			idx = i
+		}
+	}
+	if stopOnce != nil {
+		stopOnce.state.Do(func() {
+			if err := s.Shutdown(context.Background()); err != nil {
+				otel.Handle(err)
+			}
+		})
+	}
+	if len(spss) > 1 {
+		copy(spss[idx:], spss[idx+1:])
+	}
+	spss[len(spss)-1] = nil
+	spss = spss[:len(spss)-1]
+
+	p.spanProcessors.Store(spss)
+}
+
+// ForceFlush immediately exports all spans that have not yet been exported for
+// all the registered span processors.
+func (p *TracerProvider) ForceFlush(ctx context.Context) error {
+	spss, ok := p.spanProcessors.Load().(spanProcessorStates)
+	if !ok {
+		return fmt.Errorf("failed to load span processors")
+	}
+	if len(spss) == 0 {
+		return nil
+	}
+
+	for _, sps := range spss {
+		select {
+		case <-ctx.Done():
+			return ctx.Err()
+		default:
+		}
+
+		if err := sps.sp.ForceFlush(ctx); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// Shutdown shuts down the span processors in the order they were registered.
+func (p *TracerProvider) Shutdown(ctx context.Context) error {
+	spss, ok := p.spanProcessors.Load().(spanProcessorStates)
+	if !ok {
+		return fmt.Errorf("failed to load span processors")
+	}
+	if len(spss) == 0 {
+		return nil
+	}
+
+	for _, sps := range spss {
+		select {
+		case <-ctx.Done():
+			return ctx.Err()
+		default:
+		}
+
+		var err error
+		sps.state.Do(func() {
+			err = sps.sp.Shutdown(ctx)
+		})
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+type TracerProviderOption interface {
+	apply(*tracerProviderConfig)
+}
+
+type traceProviderOptionFunc func(*tracerProviderConfig)
+
+func (fn traceProviderOptionFunc) apply(cfg *tracerProviderConfig) {
+	fn(cfg)
+}
+
+// WithSyncer registers the exporter with the TracerProvider using a
+// SimpleSpanProcessor.
+//
+// This is not recommended for production use. The synchronous nature of the
+// SimpleSpanProcessor that will wrap the exporter make it good for testing,
+// debugging, or showing examples of other feature, but it will be slow and
+// have a high computation resource usage overhead. The WithBatcher option is
+// recommended for production use instead.
+func WithSyncer(e SpanExporter) TracerProviderOption {
+	return WithSpanProcessor(NewSimpleSpanProcessor(e))
+}
+
+// WithBatcher registers the exporter with the TracerProvider using a
+// BatchSpanProcessor configured with the passed opts.
+func WithBatcher(e SpanExporter, opts ...BatchSpanProcessorOption) TracerProviderOption {
+	return WithSpanProcessor(NewBatchSpanProcessor(e, opts...))
+}
+
+// WithSpanProcessor registers the SpanProcessor with a TracerProvider.
+func WithSpanProcessor(sp SpanProcessor) TracerProviderOption {
+	return traceProviderOptionFunc(func(cfg *tracerProviderConfig) {
+		cfg.processors = append(cfg.processors, sp)
+	})
+}
+
+// WithResource returns a TracerProviderOption that will configure the
+// Resource r as a TracerProvider's Resource. The configured Resource is
+// referenced by all the Tracers the TracerProvider creates. It represents the
+// entity producing telemetry.
+//
+// If this option is not used, the TracerProvider will use the
+// resource.Default() Resource by default.
+func WithResource(r *resource.Resource) TracerProviderOption {
+	return traceProviderOptionFunc(func(cfg *tracerProviderConfig) {
+		var err error
+		cfg.resource, err = resource.Merge(resource.Environment(), r)
+		if err != nil {
+			otel.Handle(err)
+		}
+	})
+}
+
+// WithIDGenerator returns a TracerProviderOption that will configure the
+// IDGenerator g as a TracerProvider's IDGenerator. The configured IDGenerator
+// is used by the Tracers the TracerProvider creates to generate new Span and
+// Trace IDs.
+//
+// If this option is not used, the TracerProvider will use a random number
+// IDGenerator by default.
+func WithIDGenerator(g IDGenerator) TracerProviderOption {
+	return traceProviderOptionFunc(func(cfg *tracerProviderConfig) {
+		if g != nil {
+			cfg.idGenerator = g
+		}
+	})
+}
+
+// WithSampler returns a TracerProviderOption that will configure the Sampler
+// s as a TracerProvider's Sampler. The configured Sampler is used by the
+// Tracers the TracerProvider creates to make their sampling decisions for the
+// Spans they create.
+//
+// If this option is not used, the TracerProvider will use a
+// ParentBased(AlwaysSample) Sampler by default.
+func WithSampler(s Sampler) TracerProviderOption {
+	return traceProviderOptionFunc(func(cfg *tracerProviderConfig) {
+		if s != nil {
+			cfg.sampler = s
+		}
+	})
+}
+
+// WithSpanLimits returns a TracerProviderOption that will configure the
+// SpanLimits sl as a TracerProvider's SpanLimits. The configured SpanLimits
+// are used used by the Tracers the TracerProvider and the Spans they create
+// to limit tracing resources used.
+//
+// If this option is not used, the TracerProvider will use the default
+// SpanLimits.
+func WithSpanLimits(sl SpanLimits) TracerProviderOption {
+	return traceProviderOptionFunc(func(cfg *tracerProviderConfig) {
+		cfg.spanLimits = sl
+	})
+}
+
+// ensureValidTracerProviderConfig ensures that given TracerProviderConfig is valid.
+func ensureValidTracerProviderConfig(cfg *tracerProviderConfig) {
+	if cfg.sampler == nil {
+		cfg.sampler = ParentBased(AlwaysSample())
+	}
+	if cfg.idGenerator == nil {
+		cfg.idGenerator = defaultIDGenerator()
+	}
+	cfg.spanLimits.ensureDefault()
+	if cfg.resource == nil {
+		cfg.resource = resource.Default()
+	}
+}
diff --git a/vendor/go.opentelemetry.io/otel/sdk/trace/sampling.go b/vendor/go.opentelemetry.io/otel/sdk/trace/sampling.go
new file mode 100644
index 000000000..849248638
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/sdk/trace/sampling.go
@@ -0,0 +1,288 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package trace // import "go.opentelemetry.io/otel/sdk/trace"
+
+import (
+	"context"
+	"encoding/binary"
+	"fmt"
+
+	"go.opentelemetry.io/otel/attribute"
+	"go.opentelemetry.io/otel/trace"
+)
+
+// Sampler decides whether a trace should be sampled and exported.
+type Sampler interface {
+	// DO NOT CHANGE: any modification will not be backwards compatible and
+	// must never be done outside of a new major release.
+
+	// ShouldSample returns a SamplingResult based on a decision made from the
+	// passed parameters.
+	ShouldSample(parameters SamplingParameters) SamplingResult
+	// DO NOT CHANGE: any modification will not be backwards compatible and
+	// must never be done outside of a new major release.
+
+	// Description returns information describing the Sampler.
+	Description() string
+	// DO NOT CHANGE: any modification will not be backwards compatible and
+	// must never be done outside of a new major release.
+}
+
+// SamplingParameters contains the values passed to a Sampler.
+type SamplingParameters struct {
+	ParentContext context.Context
+	TraceID       trace.TraceID
+	Name          string
+	Kind          trace.SpanKind
+	Attributes    []attribute.KeyValue
+	Links         []trace.Link
+}
+
+// SamplingDecision indicates whether a span is dropped, recorded and/or sampled.
+type SamplingDecision uint8
+
+// Valid sampling decisions
+const (
+	// Drop will not record the span and all attributes/events will be dropped
+	Drop SamplingDecision = iota
+
+	// Record indicates the span's `IsRecording() == true`, but `Sampled` flag
+	// *must not* be set
+	RecordOnly
+
+	// RecordAndSample has span's `IsRecording() == true` and `Sampled` flag
+	// *must* be set
+	RecordAndSample
+)
+
+// SamplingResult conveys a SamplingDecision, set of Attributes and a Tracestate.
+type SamplingResult struct {
+	Decision   SamplingDecision
+	Attributes []attribute.KeyValue
+	Tracestate trace.TraceState
+}
+
+type traceIDRatioSampler struct {
+	traceIDUpperBound uint64
+	description       string
+}
+
+func (ts traceIDRatioSampler) ShouldSample(p SamplingParameters) SamplingResult {
+	psc := trace.SpanContextFromContext(p.ParentContext)
+	x := binary.BigEndian.Uint64(p.TraceID[0:8]) >> 1
+	if x < ts.traceIDUpperBound {
+		return SamplingResult{
+			Decision:   RecordAndSample,
+			Tracestate: psc.TraceState(),
+		}
+	}
+	return SamplingResult{
+		Decision:   Drop,
+		Tracestate: psc.TraceState(),
+	}
+}
+
+func (ts traceIDRatioSampler) Description() string {
+	return ts.description
+}
+
+// TraceIDRatioBased samples a given fraction of traces. Fractions >= 1 will
+// always sample. Fractions < 0 are treated as zero. To respect the
+// parent trace's `SampledFlag`, the `TraceIDRatioBased` sampler should be used
+// as a delegate of a `Parent` sampler.
+//nolint:revive // revive complains about stutter of `trace.TraceIDRatioBased`
+func TraceIDRatioBased(fraction float64) Sampler {
+	if fraction >= 1 {
+		return AlwaysSample()
+	}
+
+	if fraction <= 0 {
+		fraction = 0
+	}
+
+	return &traceIDRatioSampler{
+		traceIDUpperBound: uint64(fraction * (1 << 63)),
+		description:       fmt.Sprintf("TraceIDRatioBased{%g}", fraction),
+	}
+}
+
+type alwaysOnSampler struct{}
+
+func (as alwaysOnSampler) ShouldSample(p SamplingParameters) SamplingResult {
+	return SamplingResult{
+		Decision:   RecordAndSample,
+		Tracestate: trace.SpanContextFromContext(p.ParentContext).TraceState(),
+	}
+}
+
+func (as alwaysOnSampler) Description() string {
+	return "AlwaysOnSampler"
+}
+
+// AlwaysSample returns a Sampler that samples every trace.
+// Be careful about using this sampler in a production application with
+// significant traffic: a new trace will be started and exported for every
+// request.
+func AlwaysSample() Sampler {
+	return alwaysOnSampler{}
+}
+
+type alwaysOffSampler struct{}
+
+func (as alwaysOffSampler) ShouldSample(p SamplingParameters) SamplingResult {
+	return SamplingResult{
+		Decision:   Drop,
+		Tracestate: trace.SpanContextFromContext(p.ParentContext).TraceState(),
+	}
+}
+
+func (as alwaysOffSampler) Description() string {
+	return "AlwaysOffSampler"
+}
+
+// NeverSample returns a Sampler that samples no traces.
+func NeverSample() Sampler {
+	return alwaysOffSampler{}
+}
+
+// ParentBased returns a composite sampler which behaves differently,
+// based on the parent of the span. If the span has no parent,
+// the root(Sampler) is used to make sampling decision. If the span has
+// a parent, depending on whether the parent is remote and whether it
+// is sampled, one of the following samplers will apply:
+// - remoteParentSampled(Sampler) (default: AlwaysOn)
+// - remoteParentNotSampled(Sampler) (default: AlwaysOff)
+// - localParentSampled(Sampler) (default: AlwaysOn)
+// - localParentNotSampled(Sampler) (default: AlwaysOff)
+func ParentBased(root Sampler, samplers ...ParentBasedSamplerOption) Sampler {
+	return parentBased{
+		root:   root,
+		config: configureSamplersForParentBased(samplers),
+	}
+}
+
+type parentBased struct {
+	root   Sampler
+	config samplerConfig
+}
+
+func configureSamplersForParentBased(samplers []ParentBasedSamplerOption) samplerConfig {
+	c := samplerConfig{
+		remoteParentSampled:    AlwaysSample(),
+		remoteParentNotSampled: NeverSample(),
+		localParentSampled:     AlwaysSample(),
+		localParentNotSampled:  NeverSample(),
+	}
+
+	for _, so := range samplers {
+		so.apply(&c)
+	}
+
+	return c
+}
+
+// samplerConfig is a group of options for parentBased sampler.
+type samplerConfig struct {
+	remoteParentSampled, remoteParentNotSampled Sampler
+	localParentSampled, localParentNotSampled   Sampler
+}
+
+// ParentBasedSamplerOption configures the sampler for a particular sampling case.
+type ParentBasedSamplerOption interface {
+	apply(*samplerConfig)
+}
+
+// WithRemoteParentSampled sets the sampler for the case of sampled remote parent.
+func WithRemoteParentSampled(s Sampler) ParentBasedSamplerOption {
+	return remoteParentSampledOption{s}
+}
+
+type remoteParentSampledOption struct {
+	s Sampler
+}
+
+func (o remoteParentSampledOption) apply(config *samplerConfig) {
+	config.remoteParentSampled = o.s
+}
+
+// WithRemoteParentNotSampled sets the sampler for the case of remote parent
+// which is not sampled.
+func WithRemoteParentNotSampled(s Sampler) ParentBasedSamplerOption {
+	return remoteParentNotSampledOption{s}
+}
+
+type remoteParentNotSampledOption struct {
+	s Sampler
+}
+
+func (o remoteParentNotSampledOption) apply(config *samplerConfig) {
+	config.remoteParentNotSampled = o.s
+}
+
+// WithLocalParentSampled sets the sampler for the case of sampled local parent.
+func WithLocalParentSampled(s Sampler) ParentBasedSamplerOption {
+	return localParentSampledOption{s}
+}
+
+type localParentSampledOption struct {
+	s Sampler
+}
+
+func (o localParentSampledOption) apply(config *samplerConfig) {
+	config.localParentSampled = o.s
+}
+
+// WithLocalParentNotSampled sets the sampler for the case of local parent
+// which is not sampled.
+func WithLocalParentNotSampled(s Sampler) ParentBasedSamplerOption {
+	return localParentNotSampledOption{s}
+}
+
+type localParentNotSampledOption struct {
+	s Sampler
+}
+
+func (o localParentNotSampledOption) apply(config *samplerConfig) {
+	config.localParentNotSampled = o.s
+}
+
+func (pb parentBased) ShouldSample(p SamplingParameters) SamplingResult {
+	psc := trace.SpanContextFromContext(p.ParentContext)
+	if psc.IsValid() {
+		if psc.IsRemote() {
+			if psc.IsSampled() {
+				return pb.config.remoteParentSampled.ShouldSample(p)
+			}
+			return pb.config.remoteParentNotSampled.ShouldSample(p)
+		}
+
+		if psc.IsSampled() {
+			return pb.config.localParentSampled.ShouldSample(p)
+		}
+		return pb.config.localParentNotSampled.ShouldSample(p)
+	}
+	return pb.root.ShouldSample(p)
+}
+
+func (pb parentBased) Description() string {
+	return fmt.Sprintf("ParentBased{root:%s,remoteParentSampled:%s,"+
+		"remoteParentNotSampled:%s,localParentSampled:%s,localParentNotSampled:%s}",
+		pb.root.Description(),
+		pb.config.remoteParentSampled.Description(),
+		pb.config.remoteParentNotSampled.Description(),
+		pb.config.localParentSampled.Description(),
+		pb.config.localParentNotSampled.Description(),
+	)
+}
diff --git a/vendor/go.opentelemetry.io/otel/sdk/trace/simple_span_processor.go b/vendor/go.opentelemetry.io/otel/sdk/trace/simple_span_processor.go
new file mode 100644
index 000000000..9dc87f893
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/sdk/trace/simple_span_processor.go
@@ -0,0 +1,103 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package trace // import "go.opentelemetry.io/otel/sdk/trace"
+
+import (
+	"context"
+	"sync"
+
+	"go.opentelemetry.io/otel"
+)
+
+// simpleSpanProcessor is a SpanProcessor that synchronously sends all
+// completed Spans to a trace.Exporter immediately.
+type simpleSpanProcessor struct {
+	exporterMu sync.RWMutex
+	exporter   SpanExporter
+	stopOnce   sync.Once
+}
+
+var _ SpanProcessor = (*simpleSpanProcessor)(nil)
+
+// NewSimpleSpanProcessor returns a new SpanProcessor that will synchronously
+// send completed spans to the exporter immediately.
+//
+// This SpanProcessor is not recommended for production use. The synchronous
+// nature of this SpanProcessor make it good for testing, debugging, or
+// showing examples of other feature, but it will be slow and have a high
+// computation resource usage overhead. The BatchSpanProcessor is recommended
+// for production use instead.
+func NewSimpleSpanProcessor(exporter SpanExporter) SpanProcessor {
+	ssp := &simpleSpanProcessor{
+		exporter: exporter,
+	}
+	return ssp
+}
+
+// OnStart does nothing.
+func (ssp *simpleSpanProcessor) OnStart(context.Context, ReadWriteSpan) {}
+
+// OnEnd immediately exports a ReadOnlySpan.
+func (ssp *simpleSpanProcessor) OnEnd(s ReadOnlySpan) {
+	ssp.exporterMu.RLock()
+	defer ssp.exporterMu.RUnlock()
+
+	if ssp.exporter != nil && s.SpanContext().TraceFlags().IsSampled() {
+		if err := ssp.exporter.ExportSpans(context.Background(), []ReadOnlySpan{s}); err != nil {
+			otel.Handle(err)
+		}
+	}
+}
+
+// Shutdown shuts down the exporter this SimpleSpanProcessor exports to.
+func (ssp *simpleSpanProcessor) Shutdown(ctx context.Context) error {
+	var err error
+	ssp.stopOnce.Do(func() {
+		stopFunc := func(exp SpanExporter) (<-chan error, func()) {
+			done := make(chan error)
+			return done, func() { done <- exp.Shutdown(ctx) }
+		}
+
+		// The exporter field of the simpleSpanProcessor needs to be zeroed to
+		// signal it is shut down, meaning all subsequent calls to OnEnd will
+		// be gracefully ignored. This needs to be done synchronously to avoid
+		// any race condition.
+		//
+		// A closure is used to keep reference to the exporter and then the
+		// field is zeroed. This ensures the simpleSpanProcessor is shut down
+		// before the exporter. This order is important as it avoids a
+		// potential deadlock. If the exporter shut down operation generates a
+		// span, that span would need to be exported. Meaning, OnEnd would be
+		// called and try acquiring the lock that is held here.
+		ssp.exporterMu.Lock()
+		done, shutdown := stopFunc(ssp.exporter)
+		ssp.exporter = nil
+		ssp.exporterMu.Unlock()
+
+		go shutdown()
+
+		select {
+		case err = <-done:
+		case <-ctx.Done():
+			err = ctx.Err()
+		}
+	})
+	return err
+}
+
+// ForceFlush does nothing as there is no data to flush.
+func (ssp *simpleSpanProcessor) ForceFlush(context.Context) error {
+	return nil
+}
diff --git a/vendor/go.opentelemetry.io/otel/sdk/trace/snapshot.go b/vendor/go.opentelemetry.io/otel/sdk/trace/snapshot.go
new file mode 100644
index 000000000..847617a38
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/sdk/trace/snapshot.go
@@ -0,0 +1,138 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package trace
+
+import (
+	"time"
+
+	"go.opentelemetry.io/otel/attribute"
+	"go.opentelemetry.io/otel/sdk/instrumentation"
+	"go.opentelemetry.io/otel/sdk/resource"
+	"go.opentelemetry.io/otel/trace"
+)
+
+// snapshot is an record of a spans state at a particular checkpointed time.
+// It is used as a read-only representation of that state.
+type snapshot struct {
+	name                   string
+	spanContext            trace.SpanContext
+	parent                 trace.SpanContext
+	spanKind               trace.SpanKind
+	startTime              time.Time
+	endTime                time.Time
+	attributes             []attribute.KeyValue
+	events                 []Event
+	links                  []trace.Link
+	status                 Status
+	childSpanCount         int
+	droppedAttributeCount  int
+	droppedEventCount      int
+	droppedLinkCount       int
+	resource               *resource.Resource
+	instrumentationLibrary instrumentation.Library
+}
+
+var _ ReadOnlySpan = snapshot{}
+
+func (s snapshot) private() {}
+
+// Name returns the name of the span.
+func (s snapshot) Name() string {
+	return s.name
+}
+
+// SpanContext returns the unique SpanContext that identifies the span.
+func (s snapshot) SpanContext() trace.SpanContext {
+	return s.spanContext
+}
+
+// Parent returns the unique SpanContext that identifies the parent of the
+// span if one exists. If the span has no parent the returned SpanContext
+// will be invalid.
+func (s snapshot) Parent() trace.SpanContext {
+	return s.parent
+}
+
+// SpanKind returns the role the span plays in a Trace.
+func (s snapshot) SpanKind() trace.SpanKind {
+	return s.spanKind
+}
+
+// StartTime returns the time the span started recording.
+func (s snapshot) StartTime() time.Time {
+	return s.startTime
+}
+
+// EndTime returns the time the span stopped recording. It will be zero if
+// the span has not ended.
+func (s snapshot) EndTime() time.Time {
+	return s.endTime
+}
+
+// Attributes returns the defining attributes of the span.
+func (s snapshot) Attributes() []attribute.KeyValue {
+	return s.attributes
+}
+
+// Links returns all the links the span has to other spans.
+func (s snapshot) Links() []trace.Link {
+	return s.links
+}
+
+// Events returns all the events that occurred within in the spans
+// lifetime.
+func (s snapshot) Events() []Event {
+	return s.events
+}
+
+// Status returns the spans status.
+func (s snapshot) Status() Status {
+	return s.status
+}
+
+// InstrumentationLibrary returns information about the instrumentation
+// library that created the span.
+func (s snapshot) InstrumentationLibrary() instrumentation.Library {
+	return s.instrumentationLibrary
+}
+
+// Resource returns information about the entity that produced the span.
+func (s snapshot) Resource() *resource.Resource {
+	return s.resource
+}
+
+// DroppedAttributes returns the number of attributes dropped by the span
+// due to limits being reached.
+func (s snapshot) DroppedAttributes() int {
+	return s.droppedAttributeCount
+}
+
+// DroppedLinks returns the number of links dropped by the span due to limits
+// being reached.
+func (s snapshot) DroppedLinks() int {
+	return s.droppedLinkCount
+}
+
+// DroppedEvents returns the number of events dropped by the span due to
+// limits being reached.
+func (s snapshot) DroppedEvents() int {
+	return s.droppedEventCount
+}
+
+// ChildSpanCount returns the count of spans that consider the span a
+// direct parent.
+func (s snapshot) ChildSpanCount() int {
+	return s.childSpanCount
+}
diff --git a/vendor/go.opentelemetry.io/otel/sdk/trace/span.go b/vendor/go.opentelemetry.io/otel/sdk/trace/span.go
new file mode 100644
index 000000000..349ab4a96
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/sdk/trace/span.go
@@ -0,0 +1,641 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package trace // import "go.opentelemetry.io/otel/sdk/trace"
+
+import (
+	"context"
+	"fmt"
+	"reflect"
+	"sync"
+	"time"
+
+	"go.opentelemetry.io/otel/attribute"
+	"go.opentelemetry.io/otel/codes"
+	semconv "go.opentelemetry.io/otel/semconv/v1.4.0"
+	"go.opentelemetry.io/otel/trace"
+
+	"go.opentelemetry.io/otel/sdk/instrumentation"
+	"go.opentelemetry.io/otel/sdk/internal"
+	"go.opentelemetry.io/otel/sdk/resource"
+)
+
+// ReadOnlySpan allows reading information from the data structure underlying a
+// trace.Span. It is used in places where reading information from a span is
+// necessary but changing the span isn't necessary or allowed.
+//
+// Warning: methods may be added to this interface in minor releases.
+type ReadOnlySpan interface {
+	// Name returns the name of the span.
+	Name() string
+	// SpanContext returns the unique SpanContext that identifies the span.
+	SpanContext() trace.SpanContext
+	// Parent returns the unique SpanContext that identifies the parent of the
+	// span if one exists. If the span has no parent the returned SpanContext
+	// will be invalid.
+	Parent() trace.SpanContext
+	// SpanKind returns the role the span plays in a Trace.
+	SpanKind() trace.SpanKind
+	// StartTime returns the time the span started recording.
+	StartTime() time.Time
+	// EndTime returns the time the span stopped recording. It will be zero if
+	// the span has not ended.
+	EndTime() time.Time
+	// Attributes returns the defining attributes of the span.
+	Attributes() []attribute.KeyValue
+	// Links returns all the links the span has to other spans.
+	Links() []trace.Link
+	// Events returns all the events that occurred within in the spans
+	// lifetime.
+	Events() []Event
+	// Status returns the spans status.
+	Status() Status
+	// InstrumentationLibrary returns information about the instrumentation
+	// library that created the span.
+	InstrumentationLibrary() instrumentation.Library
+	// Resource returns information about the entity that produced the span.
+	Resource() *resource.Resource
+	// DroppedAttributes returns the number of attributes dropped by the span
+	// due to limits being reached.
+	DroppedAttributes() int
+	// DroppedLinks returns the number of links dropped by the span due to
+	// limits being reached.
+	DroppedLinks() int
+	// DroppedEvents returns the number of events dropped by the span due to
+	// limits being reached.
+	DroppedEvents() int
+	// ChildSpanCount returns the count of spans that consider the span a
+	// direct parent.
+	ChildSpanCount() int
+
+	// A private method to prevent users implementing the
+	// interface and so future additions to it will not
+	// violate compatibility.
+	private()
+}
+
+// ReadWriteSpan exposes the same methods as trace.Span and in addition allows
+// reading information from the underlying data structure.
+// This interface exposes the union of the methods of trace.Span (which is a
+// "write-only" span) and ReadOnlySpan. New methods for writing or reading span
+// information should be added under trace.Span or ReadOnlySpan, respectively.
+//
+// Warning: methods may be added to this interface in minor releases.
+type ReadWriteSpan interface {
+	trace.Span
+	ReadOnlySpan
+}
+
+// span is an implementation of the OpenTelemetry Span API representing the
+// individual component of a trace.
+type span struct {
+	// mu protects the contents of this span.
+	mu sync.Mutex
+
+	// parent holds the parent span of this span as a trace.SpanContext.
+	parent trace.SpanContext
+
+	// spanKind represents the kind of this span as a trace.SpanKind.
+	spanKind trace.SpanKind
+
+	// name is the name of this span.
+	name string
+
+	// startTime is the time at which this span was started.
+	startTime time.Time
+
+	// endTime is the time at which this span was ended. It contains the zero
+	// value of time.Time until the span is ended.
+	endTime time.Time
+
+	// status is the status of this span.
+	status Status
+
+	// childSpanCount holds the number of child spans created for this span.
+	childSpanCount int
+
+	// resource contains attributes representing an entity that produced this
+	// span.
+	resource *resource.Resource
+
+	// instrumentationLibrary defines the instrumentation library used to
+	// provide instrumentation.
+	instrumentationLibrary instrumentation.Library
+
+	// spanContext holds the SpanContext of this span.
+	spanContext trace.SpanContext
+
+	// attributes are capped at configured limit. When the capacity is reached
+	// an oldest entry is removed to create room for a new entry.
+	attributes *attributesMap
+
+	// events are stored in FIFO queue capped by configured limit.
+	events *evictedQueue
+
+	// links are stored in FIFO queue capped by configured limit.
+	links *evictedQueue
+
+	// executionTracerTaskEnd ends the execution tracer span.
+	executionTracerTaskEnd func()
+
+	// tracer is the SDK tracer that created this span.
+	tracer *tracer
+
+	// spanLimits holds the limits to this span.
+	spanLimits SpanLimits
+}
+
+var _ trace.Span = &span{}
+
+// SpanContext returns the SpanContext of this span.
+func (s *span) SpanContext() trace.SpanContext {
+	if s == nil {
+		return trace.SpanContext{}
+	}
+	return s.spanContext
+}
+
+// IsRecording returns if this span is being recorded. If this span has ended
+// this will return false.
+func (s *span) IsRecording() bool {
+	if s == nil {
+		return false
+	}
+	s.mu.Lock()
+	defer s.mu.Unlock()
+
+	return !s.startTime.IsZero() && s.endTime.IsZero()
+}
+
+// SetStatus sets the status of the Span in the form of a code and a
+// description, overriding previous values set. The description is only
+// included in the set status when the code is for an error. If this span is
+// not being recorded than this method does nothing.
+func (s *span) SetStatus(code codes.Code, description string) {
+	if !s.IsRecording() {
+		return
+	}
+
+	status := Status{Code: code}
+	if code == codes.Error {
+		status.Description = description
+	}
+
+	s.mu.Lock()
+	s.status = status
+	s.mu.Unlock()
+}
+
+// SetAttributes sets attributes of this span.
+//
+// If a key from attributes already exists the value associated with that key
+// will be overwritten with the value contained in attributes.
+//
+// If this span is not being recorded than this method does nothing.
+func (s *span) SetAttributes(attributes ...attribute.KeyValue) {
+	if !s.IsRecording() {
+		return
+	}
+	s.copyToCappedAttributes(attributes...)
+}
+
+// End ends the span. This method does nothing if the span is already ended or
+// is not being recorded.
+//
+// The only SpanOption currently supported is WithTimestamp which will set the
+// end time for a Span's life-cycle.
+//
+// If this method is called while panicking an error event is added to the
+// Span before ending it and the panic is continued.
+func (s *span) End(options ...trace.SpanEndOption) {
+	// Do not start by checking if the span is being recorded which requires
+	// acquiring a lock. Make a minimal check that the span is not nil.
+	if s == nil {
+		return
+	}
+
+	// Store the end time as soon as possible to avoid artificially increasing
+	// the span's duration in case some operation below takes a while.
+	et := internal.MonotonicEndTime(s.startTime)
+
+	// Do relative expensive check now that we have an end time and see if we
+	// need to do any more processing.
+	if !s.IsRecording() {
+		return
+	}
+
+	if recovered := recover(); recovered != nil {
+		// Record but don't stop the panic.
+		defer panic(recovered)
+		s.addEvent(
+			semconv.ExceptionEventName,
+			trace.WithAttributes(
+				semconv.ExceptionTypeKey.String(typeStr(recovered)),
+				semconv.ExceptionMessageKey.String(fmt.Sprint(recovered)),
+			),
+		)
+	}
+
+	if s.executionTracerTaskEnd != nil {
+		s.executionTracerTaskEnd()
+	}
+
+	config := trace.NewSpanEndConfig(options...)
+
+	s.mu.Lock()
+	// Setting endTime to non-zero marks the span as ended and not recording.
+	if config.Timestamp().IsZero() {
+		s.endTime = et
+	} else {
+		s.endTime = config.Timestamp()
+	}
+	s.mu.Unlock()
+
+	sps, ok := s.tracer.provider.spanProcessors.Load().(spanProcessorStates)
+	mustExportOrProcess := ok && len(sps) > 0
+	if mustExportOrProcess {
+		for _, sp := range sps {
+			sp.sp.OnEnd(s.snapshot())
+		}
+	}
+}
+
+// RecordError will record err as a span event for this span. An additional call to
+// SetStatus is required if the Status of the Span should be set to Error, this method
+// does not change the Span status. If this span is not being recorded or err is nil
+// than this method does nothing.
+func (s *span) RecordError(err error, opts ...trace.EventOption) {
+	if s == nil || err == nil || !s.IsRecording() {
+		return
+	}
+
+	opts = append(opts, trace.WithAttributes(
+		semconv.ExceptionTypeKey.String(typeStr(err)),
+		semconv.ExceptionMessageKey.String(err.Error()),
+	))
+	s.addEvent(semconv.ExceptionEventName, opts...)
+}
+
+func typeStr(i interface{}) string {
+	t := reflect.TypeOf(i)
+	if t.PkgPath() == "" && t.Name() == "" {
+		// Likely a builtin type.
+		return t.String()
+	}
+	return fmt.Sprintf("%s.%s", t.PkgPath(), t.Name())
+}
+
+// AddEvent adds an event with the provided name and options. If this span is
+// not being recorded than this method does nothing.
+func (s *span) AddEvent(name string, o ...trace.EventOption) {
+	if !s.IsRecording() {
+		return
+	}
+	s.addEvent(name, o...)
+}
+
+func (s *span) addEvent(name string, o ...trace.EventOption) {
+	c := trace.NewEventConfig(o...)
+
+	// Discard over limited attributes
+	attributes := c.Attributes()
+	var discarded int
+	if len(attributes) > s.spanLimits.AttributePerEventCountLimit {
+		discarded = len(attributes) - s.spanLimits.AttributePerEventCountLimit
+		attributes = attributes[:s.spanLimits.AttributePerEventCountLimit]
+	}
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	s.events.add(Event{
+		Name:                  name,
+		Attributes:            attributes,
+		DroppedAttributeCount: discarded,
+		Time:                  c.Timestamp(),
+	})
+}
+
+// SetName sets the name of this span. If this span is not being recorded than
+// this method does nothing.
+func (s *span) SetName(name string) {
+	if !s.IsRecording() {
+		return
+	}
+
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	s.name = name
+}
+
+// Name returns the name of this span.
+func (s *span) Name() string {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	return s.name
+}
+
+// Name returns the SpanContext of this span's parent span.
+func (s *span) Parent() trace.SpanContext {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	return s.parent
+}
+
+// SpanKind returns the SpanKind of this span.
+func (s *span) SpanKind() trace.SpanKind {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	return s.spanKind
+}
+
+// StartTime returns the time this span started.
+func (s *span) StartTime() time.Time {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	return s.startTime
+}
+
+// EndTime returns the time this span ended. For spans that have not yet
+// ended, the returned value will be the zero value of time.Time.
+func (s *span) EndTime() time.Time {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	return s.endTime
+}
+
+// Attributes returns the attributes of this span.
+func (s *span) Attributes() []attribute.KeyValue {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	if s.attributes.evictList.Len() == 0 {
+		return []attribute.KeyValue{}
+	}
+	return s.attributes.toKeyValue()
+}
+
+// Links returns the links of this span.
+func (s *span) Links() []trace.Link {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	if len(s.links.queue) == 0 {
+		return []trace.Link{}
+	}
+	return s.interfaceArrayToLinksArray()
+}
+
+// Events returns the events of this span.
+func (s *span) Events() []Event {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	if len(s.events.queue) == 0 {
+		return []Event{}
+	}
+	return s.interfaceArrayToEventArray()
+}
+
+// Status returns the status of this span.
+func (s *span) Status() Status {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	return s.status
+}
+
+// InstrumentationLibrary returns the instrumentation.Library associated with
+// the Tracer that created this span.
+func (s *span) InstrumentationLibrary() instrumentation.Library {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	return s.instrumentationLibrary
+}
+
+// Resource returns the Resource associated with the Tracer that created this
+// span.
+func (s *span) Resource() *resource.Resource {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	return s.resource
+}
+
+func (s *span) addLink(link trace.Link) {
+	if !s.IsRecording() {
+		return
+	}
+	s.mu.Lock()
+	defer s.mu.Unlock()
+
+	// Discard over limited attributes
+	if len(link.Attributes) > s.spanLimits.AttributePerLinkCountLimit {
+		link.DroppedAttributeCount = len(link.Attributes) - s.spanLimits.AttributePerLinkCountLimit
+		link.Attributes = link.Attributes[:s.spanLimits.AttributePerLinkCountLimit]
+	}
+
+	s.links.add(link)
+}
+
+// DroppedAttributes returns the number of attributes dropped by the span
+// due to limits being reached.
+func (s *span) DroppedAttributes() int {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	return s.attributes.droppedCount
+}
+
+// DroppedLinks returns the number of links dropped by the span due to limits
+// being reached.
+func (s *span) DroppedLinks() int {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	return s.links.droppedCount
+}
+
+// DroppedEvents returns the number of events dropped by the span due to
+// limits being reached.
+func (s *span) DroppedEvents() int {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	return s.events.droppedCount
+}
+
+// ChildSpanCount returns the count of spans that consider the span a
+// direct parent.
+func (s *span) ChildSpanCount() int {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	return s.childSpanCount
+}
+
+// TracerProvider returns a trace.TracerProvider that can be used to generate
+// additional Spans on the same telemetry pipeline as the current Span.
+func (s *span) TracerProvider() trace.TracerProvider {
+	return s.tracer.provider
+}
+
+// snapshot creates a read-only copy of the current state of the span.
+func (s *span) snapshot() ReadOnlySpan {
+	var sd snapshot
+	s.mu.Lock()
+	defer s.mu.Unlock()
+
+	sd.endTime = s.endTime
+	sd.instrumentationLibrary = s.instrumentationLibrary
+	sd.name = s.name
+	sd.parent = s.parent
+	sd.resource = s.resource
+	sd.spanContext = s.spanContext
+	sd.spanKind = s.spanKind
+	sd.startTime = s.startTime
+	sd.status = s.status
+	sd.childSpanCount = s.childSpanCount
+
+	if s.attributes.evictList.Len() > 0 {
+		sd.attributes = s.attributes.toKeyValue()
+		sd.droppedAttributeCount = s.attributes.droppedCount
+	}
+	if len(s.events.queue) > 0 {
+		sd.events = s.interfaceArrayToEventArray()
+		sd.droppedEventCount = s.events.droppedCount
+	}
+	if len(s.links.queue) > 0 {
+		sd.links = s.interfaceArrayToLinksArray()
+		sd.droppedLinkCount = s.links.droppedCount
+	}
+	return &sd
+}
+
+func (s *span) interfaceArrayToLinksArray() []trace.Link {
+	linkArr := make([]trace.Link, 0)
+	for _, value := range s.links.queue {
+		linkArr = append(linkArr, value.(trace.Link))
+	}
+	return linkArr
+}
+
+func (s *span) interfaceArrayToEventArray() []Event {
+	eventArr := make([]Event, 0)
+	for _, value := range s.events.queue {
+		eventArr = append(eventArr, value.(Event))
+	}
+	return eventArr
+}
+
+func (s *span) copyToCappedAttributes(attributes ...attribute.KeyValue) {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	for _, a := range attributes {
+		// Ensure attributes conform to the specification:
+		// https://github.com/open-telemetry/opentelemetry-specification/blob/v1.0.1/specification/common/common.md#attributes
+		if a.Valid() {
+			s.attributes.add(a)
+		}
+	}
+}
+
+func (s *span) addChild() {
+	if !s.IsRecording() {
+		return
+	}
+	s.mu.Lock()
+	s.childSpanCount++
+	s.mu.Unlock()
+}
+
+func (*span) private() {}
+
+func startSpanInternal(ctx context.Context, tr *tracer, name string, o *trace.SpanConfig) *span {
+	span := &span{}
+
+	provider := tr.provider
+
+	// If told explicitly to make this a new root use a zero value SpanContext
+	// as a parent which contains an invalid trace ID and is not remote.
+	var psc trace.SpanContext
+	if !o.NewRoot() {
+		psc = trace.SpanContextFromContext(ctx)
+	}
+
+	// If there is a valid parent trace ID, use it to ensure the continuity of
+	// the trace. Always generate a new span ID so other components can rely
+	// on a unique span ID, even if the Span is non-recording.
+	var tid trace.TraceID
+	var sid trace.SpanID
+	if !psc.TraceID().IsValid() {
+		tid, sid = provider.idGenerator.NewIDs(ctx)
+	} else {
+		tid = psc.TraceID()
+		sid = provider.idGenerator.NewSpanID(ctx, tid)
+	}
+
+	spanLimits := provider.spanLimits
+	span.attributes = newAttributesMap(spanLimits.AttributeCountLimit)
+	span.events = newEvictedQueue(spanLimits.EventCountLimit)
+	span.links = newEvictedQueue(spanLimits.LinkCountLimit)
+	span.spanLimits = spanLimits
+
+	samplingResult := provider.sampler.ShouldSample(SamplingParameters{
+		ParentContext: ctx,
+		TraceID:       tid,
+		Name:          name,
+		Kind:          o.SpanKind(),
+		Attributes:    o.Attributes(),
+		Links:         o.Links(),
+	})
+
+	scc := trace.SpanContextConfig{
+		TraceID:    tid,
+		SpanID:     sid,
+		TraceState: samplingResult.Tracestate,
+	}
+	if isSampled(samplingResult) {
+		scc.TraceFlags = psc.TraceFlags() | trace.FlagsSampled
+	} else {
+		scc.TraceFlags = psc.TraceFlags() &^ trace.FlagsSampled
+	}
+	span.spanContext = trace.NewSpanContext(scc)
+
+	if !isRecording(samplingResult) {
+		return span
+	}
+
+	startTime := o.Timestamp()
+	if startTime.IsZero() {
+		startTime = time.Now()
+	}
+	span.startTime = startTime
+
+	span.spanKind = trace.ValidateSpanKind(o.SpanKind())
+	span.name = name
+	span.parent = psc
+	span.resource = provider.resource
+	span.instrumentationLibrary = tr.instrumentationLibrary
+
+	span.SetAttributes(samplingResult.Attributes...)
+
+	return span
+}
+
+func isRecording(s SamplingResult) bool {
+	return s.Decision == RecordOnly || s.Decision == RecordAndSample
+}
+
+func isSampled(s SamplingResult) bool {
+	return s.Decision == RecordAndSample
+}
+
+// Status is the classified state of a Span.
+type Status struct {
+	// Code is an identifier of a Spans state classification.
+	Code codes.Code
+	// Message is a user hint about why that status was set. It is only
+	// applicable when Code is Error.
+	Description string
+}
diff --git a/vendor/go.opentelemetry.io/otel/sdk/trace/span_exporter.go b/vendor/go.opentelemetry.io/otel/sdk/trace/span_exporter.go
new file mode 100644
index 000000000..9fb3d6eac
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/sdk/trace/span_exporter.go
@@ -0,0 +1,47 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package trace // import "go.opentelemetry.io/otel/sdk/trace"
+
+import "context"
+
+// SpanExporter handles the delivery of spans to external receivers. This is
+// the final component in the trace export pipeline.
+type SpanExporter interface {
+	// DO NOT CHANGE: any modification will not be backwards compatible and
+	// must never be done outside of a new major release.
+
+	// ExportSpans exports a batch of spans.
+	//
+	// This function is called synchronously, so there is no concurrency
+	// safety requirement. However, due to the synchronous calling pattern,
+	// it is critical that all timeouts and cancellations contained in the
+	// passed context must be honored.
+	//
+	// Any retry logic must be contained in this function. The SDK that
+	// calls this function will not implement any retry logic. All errors
+	// returned by this function are considered unrecoverable and will be
+	// reported to a configured error Handler.
+	ExportSpans(ctx context.Context, spans []ReadOnlySpan) error
+	// DO NOT CHANGE: any modification will not be backwards compatible and
+	// must never be done outside of a new major release.
+
+	// Shutdown notifies the exporter of a pending halt to operations. The
+	// exporter is expected to preform any cleanup or synchronization it
+	// requires while honoring all timeouts and cancellations contained in
+	// the passed context.
+	Shutdown(ctx context.Context) error
+	// DO NOT CHANGE: any modification will not be backwards compatible and
+	// must never be done outside of a new major release.
+}
diff --git a/vendor/go.opentelemetry.io/otel/sdk/trace/span_processor.go b/vendor/go.opentelemetry.io/otel/sdk/trace/span_processor.go
new file mode 100644
index 000000000..b649a2ff0
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/sdk/trace/span_processor.go
@@ -0,0 +1,67 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package trace // import "go.opentelemetry.io/otel/sdk/trace"
+
+import (
+	"context"
+	"sync"
+)
+
+// SpanProcessor is a processing pipeline for spans in the trace signal.
+// SpanProcessors registered with a TracerProvider and are called at the start
+// and end of a Span's lifecycle, and are called in the order they are
+// registered.
+type SpanProcessor interface {
+	// DO NOT CHANGE: any modification will not be backwards compatible and
+	// must never be done outside of a new major release.
+
+	// OnStart is called when a span is started. It is called synchronously
+	// and should not block.
+	OnStart(parent context.Context, s ReadWriteSpan)
+	// DO NOT CHANGE: any modification will not be backwards compatible and
+	// must never be done outside of a new major release.
+
+	// OnEnd is called when span is finished. It is called synchronously and
+	// hence not block.
+	OnEnd(s ReadOnlySpan)
+	// DO NOT CHANGE: any modification will not be backwards compatible and
+	// must never be done outside of a new major release.
+
+	// Shutdown is called when the SDK shuts down. Any cleanup or release of
+	// resources held by the processor should be done in this call.
+	//
+	// Calls to OnStart, OnEnd, or ForceFlush after this has been called
+	// should be ignored.
+	//
+	// All timeouts and cancellations contained in ctx must be honored, this
+	// should not block indefinitely.
+	Shutdown(ctx context.Context) error
+	// DO NOT CHANGE: any modification will not be backwards compatible and
+	// must never be done outside of a new major release.
+
+	// ForceFlush exports all ended spans to the configured Exporter that have not yet
+	// been exported.  It should only be called when absolutely necessary, such as when
+	// using a FaaS provider that may suspend the process after an invocation, but before
+	// the Processor can export the completed spans.
+	ForceFlush(ctx context.Context) error
+	// DO NOT CHANGE: any modification will not be backwards compatible and
+	// must never be done outside of a new major release.
+}
+
+type spanProcessorState struct {
+	sp    SpanProcessor
+	state *sync.Once
+}
+type spanProcessorStates []*spanProcessorState
diff --git a/vendor/go.opentelemetry.io/otel/sdk/trace/tracer.go b/vendor/go.opentelemetry.io/otel/sdk/trace/tracer.go
new file mode 100644
index 000000000..0c692fc81
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/sdk/trace/tracer.go
@@ -0,0 +1,75 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package trace // import "go.opentelemetry.io/otel/sdk/trace"
+
+import (
+	"context"
+	rt "runtime/trace"
+
+	"go.opentelemetry.io/otel/trace"
+
+	"go.opentelemetry.io/otel/sdk/instrumentation"
+)
+
+type tracer struct {
+	provider               *TracerProvider
+	instrumentationLibrary instrumentation.Library
+}
+
+var _ trace.Tracer = &tracer{}
+
+// Start starts a Span and returns it along with a context containing it.
+//
+// The Span is created with the provided name and as a child of any existing
+// span context found in the passed context. The created Span will be
+// configured appropriately by any SpanOption passed. Any Timestamp option
+// passed will be used as the start time of the Span's life-cycle.
+func (tr *tracer) Start(ctx context.Context, name string, options ...trace.SpanStartOption) (context.Context, trace.Span) {
+	config := trace.NewSpanStartConfig(options...)
+
+	// For local spans created by this SDK, track child span count.
+	if p := trace.SpanFromContext(ctx); p != nil {
+		if sdkSpan, ok := p.(*span); ok {
+			sdkSpan.addChild()
+		}
+	}
+
+	span := startSpanInternal(ctx, tr, name, config)
+	for _, l := range config.Links() {
+		span.addLink(l)
+	}
+	span.SetAttributes(config.Attributes()...)
+
+	span.tracer = tr
+
+	if span.IsRecording() {
+		sps, _ := tr.provider.spanProcessors.Load().(spanProcessorStates)
+		for _, sp := range sps {
+			sp.sp.OnStart(ctx, span)
+		}
+	}
+
+	ctx, span.executionTracerTaskEnd = func(ctx context.Context) (context.Context, func()) {
+		if !rt.IsEnabled() {
+			// Avoid additional overhead if
+			// runtime/trace is not enabled.
+			return ctx, func() {}
+		}
+		nctx, task := rt.NewTask(ctx, name)
+		return nctx, task.End
+	}(ctx)
+
+	return trace.ContextWithSpan(ctx, span), span
+}
diff --git a/vendor/go.opentelemetry.io/otel/semconv/v1.4.0/doc.go b/vendor/go.opentelemetry.io/otel/semconv/v1.4.0/doc.go
new file mode 100644
index 000000000..90184a9f3
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/semconv/v1.4.0/doc.go
@@ -0,0 +1,23 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package semconv implements OpenTelemetry semantic conventions.
+//
+// This package is currently in a Release Candidate phase. Backwards incompatible changes
+// may be introduced prior to v1.0.0, but we believe the current API is ready to stabilize.
+//
+// OpenTelemetry semantic conventions are agreed standardized naming
+// patterns for OpenTelemetry things. This package represents the conventions
+// as of the v1.4.0 version of the OpenTelemetry specification.
+package semconv // import "go.opentelemetry.io/otel/semconv/v1.4.0"
diff --git a/vendor/go.opentelemetry.io/otel/semconv/v1.4.0/exception.go b/vendor/go.opentelemetry.io/otel/semconv/v1.4.0/exception.go
new file mode 100644
index 000000000..ee13cfdbd
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/semconv/v1.4.0/exception.go
@@ -0,0 +1,20 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package semconv
+
+const (
+	// ExceptionEventName is the name of the Span event representing an exception.
+	ExceptionEventName = "exception"
+)
diff --git a/vendor/go.opentelemetry.io/otel/semconv/v1.4.0/http.go b/vendor/go.opentelemetry.io/otel/semconv/v1.4.0/http.go
new file mode 100644
index 000000000..569e3c645
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/semconv/v1.4.0/http.go
@@ -0,0 +1,311 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package semconv // import "go.opentelemetry.io/otel/semconv/v1.4.0"
+
+import (
+	"fmt"
+	"net"
+	"net/http"
+	"strconv"
+	"strings"
+
+	"go.opentelemetry.io/otel/attribute"
+	"go.opentelemetry.io/otel/codes"
+)
+
+// HTTP scheme attributes.
+var (
+	HTTPSchemeHTTP  = HTTPSchemeKey.String("http")
+	HTTPSchemeHTTPS = HTTPSchemeKey.String("https")
+)
+
+// NetAttributesFromHTTPRequest generates attributes of the net
+// namespace as specified by the OpenTelemetry specification for a
+// span.  The network parameter is a string that net.Dial function
+// from standard library can understand.
+func NetAttributesFromHTTPRequest(network string, request *http.Request) []attribute.KeyValue {
+	attrs := []attribute.KeyValue{}
+
+	switch network {
+	case "tcp", "tcp4", "tcp6":
+		attrs = append(attrs, NetTransportTCP)
+	case "udp", "udp4", "udp6":
+		attrs = append(attrs, NetTransportUDP)
+	case "ip", "ip4", "ip6":
+		attrs = append(attrs, NetTransportIP)
+	case "unix", "unixgram", "unixpacket":
+		attrs = append(attrs, NetTransportUnix)
+	default:
+		attrs = append(attrs, NetTransportOther)
+	}
+
+	peerName, peerIP, peerPort := "", "", 0
+	{
+		hostPart := request.RemoteAddr
+		portPart := ""
+		if idx := strings.LastIndex(hostPart, ":"); idx >= 0 {
+			hostPart = request.RemoteAddr[:idx]
+			portPart = request.RemoteAddr[idx+1:]
+		}
+		if hostPart != "" {
+			if ip := net.ParseIP(hostPart); ip != nil {
+				peerIP = ip.String()
+			} else {
+				peerName = hostPart
+			}
+
+			if portPart != "" {
+				numPort, err := strconv.ParseUint(portPart, 10, 16)
+				if err == nil {
+					peerPort = (int)(numPort)
+				} else {
+					peerName, peerIP = "", ""
+				}
+			}
+		}
+	}
+	if peerName != "" {
+		attrs = append(attrs, NetPeerNameKey.String(peerName))
+	}
+	if peerIP != "" {
+		attrs = append(attrs, NetPeerIPKey.String(peerIP))
+	}
+	if peerPort != 0 {
+		attrs = append(attrs, NetPeerPortKey.Int(peerPort))
+	}
+
+	hostIP, hostName, hostPort := "", "", 0
+	for _, someHost := range []string{request.Host, request.Header.Get("Host"), request.URL.Host} {
+		hostPart := ""
+		if idx := strings.LastIndex(someHost, ":"); idx >= 0 {
+			strPort := someHost[idx+1:]
+			numPort, err := strconv.ParseUint(strPort, 10, 16)
+			if err == nil {
+				hostPort = (int)(numPort)
+			}
+			hostPart = someHost[:idx]
+		} else {
+			hostPart = someHost
+		}
+		if hostPart != "" {
+			ip := net.ParseIP(hostPart)
+			if ip != nil {
+				hostIP = ip.String()
+			} else {
+				hostName = hostPart
+			}
+			break
+		} else {
+			hostPort = 0
+		}
+	}
+	if hostIP != "" {
+		attrs = append(attrs, NetHostIPKey.String(hostIP))
+	}
+	if hostName != "" {
+		attrs = append(attrs, NetHostNameKey.String(hostName))
+	}
+	if hostPort != 0 {
+		attrs = append(attrs, NetHostPortKey.Int(hostPort))
+	}
+
+	return attrs
+}
+
+// EndUserAttributesFromHTTPRequest generates attributes of the
+// enduser namespace as specified by the OpenTelemetry specification
+// for a span.
+func EndUserAttributesFromHTTPRequest(request *http.Request) []attribute.KeyValue {
+	if username, _, ok := request.BasicAuth(); ok {
+		return []attribute.KeyValue{EnduserIDKey.String(username)}
+	}
+	return nil
+}
+
+// HTTPClientAttributesFromHTTPRequest generates attributes of the
+// http namespace as specified by the OpenTelemetry specification for
+// a span on the client side.
+func HTTPClientAttributesFromHTTPRequest(request *http.Request) []attribute.KeyValue {
+	attrs := []attribute.KeyValue{}
+
+	if request.Method != "" {
+		attrs = append(attrs, HTTPMethodKey.String(request.Method))
+	} else {
+		attrs = append(attrs, HTTPMethodKey.String(http.MethodGet))
+	}
+
+	// remove any username/password info that may be in the URL
+	// before adding it to the attributes
+	userinfo := request.URL.User
+	request.URL.User = nil
+
+	attrs = append(attrs, HTTPURLKey.String(request.URL.String()))
+
+	// restore any username/password info that was removed
+	request.URL.User = userinfo
+
+	return append(attrs, httpCommonAttributesFromHTTPRequest(request)...)
+}
+
+func httpCommonAttributesFromHTTPRequest(request *http.Request) []attribute.KeyValue {
+	attrs := []attribute.KeyValue{}
+	if ua := request.UserAgent(); ua != "" {
+		attrs = append(attrs, HTTPUserAgentKey.String(ua))
+	}
+	if request.ContentLength > 0 {
+		attrs = append(attrs, HTTPRequestContentLengthKey.Int64(request.ContentLength))
+	}
+
+	return append(attrs, httpBasicAttributesFromHTTPRequest(request)...)
+}
+
+func httpBasicAttributesFromHTTPRequest(request *http.Request) []attribute.KeyValue {
+	// as these attributes are used by HTTPServerMetricAttributesFromHTTPRequest, they should be low-cardinality
+	attrs := []attribute.KeyValue{}
+
+	if request.TLS != nil {
+		attrs = append(attrs, HTTPSchemeHTTPS)
+	} else {
+		attrs = append(attrs, HTTPSchemeHTTP)
+	}
+
+	if request.Host != "" {
+		attrs = append(attrs, HTTPHostKey.String(request.Host))
+	}
+
+	flavor := ""
+	if request.ProtoMajor == 1 {
+		flavor = fmt.Sprintf("1.%d", request.ProtoMinor)
+	} else if request.ProtoMajor == 2 {
+		flavor = "2"
+	}
+	if flavor != "" {
+		attrs = append(attrs, HTTPFlavorKey.String(flavor))
+	}
+
+	return attrs
+}
+
+// HTTPServerMetricAttributesFromHTTPRequest generates low-cardinality attributes
+// to be used with server-side HTTP metrics.
+func HTTPServerMetricAttributesFromHTTPRequest(serverName string, request *http.Request) []attribute.KeyValue {
+	attrs := []attribute.KeyValue{}
+	if serverName != "" {
+		attrs = append(attrs, HTTPServerNameKey.String(serverName))
+	}
+	return append(attrs, httpBasicAttributesFromHTTPRequest(request)...)
+}
+
+// HTTPServerAttributesFromHTTPRequest generates attributes of the
+// http namespace as specified by the OpenTelemetry specification for
+// a span on the server side. Currently, only basic authentication is
+// supported.
+func HTTPServerAttributesFromHTTPRequest(serverName, route string, request *http.Request) []attribute.KeyValue {
+	attrs := []attribute.KeyValue{
+		HTTPMethodKey.String(request.Method),
+		HTTPTargetKey.String(request.RequestURI),
+	}
+
+	if serverName != "" {
+		attrs = append(attrs, HTTPServerNameKey.String(serverName))
+	}
+	if route != "" {
+		attrs = append(attrs, HTTPRouteKey.String(route))
+	}
+	if values, ok := request.Header["X-Forwarded-For"]; ok && len(values) > 0 {
+		attrs = append(attrs, HTTPClientIPKey.String(values[0]))
+	}
+
+	return append(attrs, httpCommonAttributesFromHTTPRequest(request)...)
+}
+
+// HTTPAttributesFromHTTPStatusCode generates attributes of the http
+// namespace as specified by the OpenTelemetry specification for a
+// span.
+func HTTPAttributesFromHTTPStatusCode(code int) []attribute.KeyValue {
+	attrs := []attribute.KeyValue{
+		HTTPStatusCodeKey.Int(code),
+	}
+	return attrs
+}
+
+type codeRange struct {
+	fromInclusive int
+	toInclusive   int
+}
+
+func (r codeRange) contains(code int) bool {
+	return r.fromInclusive <= code && code <= r.toInclusive
+}
+
+var validRangesPerCategory = map[int][]codeRange{
+	1: {
+		{http.StatusContinue, http.StatusEarlyHints},
+	},
+	2: {
+		{http.StatusOK, http.StatusAlreadyReported},
+		{http.StatusIMUsed, http.StatusIMUsed},
+	},
+	3: {
+		{http.StatusMultipleChoices, http.StatusUseProxy},
+		{http.StatusTemporaryRedirect, http.StatusPermanentRedirect},
+	},
+	4: {
+		{http.StatusBadRequest, http.StatusTeapot}, // yes, teapot is so useful…
+		{http.StatusMisdirectedRequest, http.StatusUpgradeRequired},
+		{http.StatusPreconditionRequired, http.StatusTooManyRequests},
+		{http.StatusRequestHeaderFieldsTooLarge, http.StatusRequestHeaderFieldsTooLarge},
+		{http.StatusUnavailableForLegalReasons, http.StatusUnavailableForLegalReasons},
+	},
+	5: {
+		{http.StatusInternalServerError, http.StatusLoopDetected},
+		{http.StatusNotExtended, http.StatusNetworkAuthenticationRequired},
+	},
+}
+
+// SpanStatusFromHTTPStatusCode generates a status code and a message
+// as specified by the OpenTelemetry specification for a span.
+func SpanStatusFromHTTPStatusCode(code int) (codes.Code, string) {
+	spanCode, valid := validateHTTPStatusCode(code)
+	if !valid {
+		return spanCode, fmt.Sprintf("Invalid HTTP status code %d", code)
+	}
+	return spanCode, ""
+}
+
+// Validates the HTTP status code and returns corresponding span status code.
+// If the `code` is not a valid HTTP status code, returns span status Error
+// and false.
+func validateHTTPStatusCode(code int) (codes.Code, bool) {
+	category := code / 100
+	ranges, ok := validRangesPerCategory[category]
+	if !ok {
+		return codes.Error, false
+	}
+	ok = false
+	for _, crange := range ranges {
+		ok = crange.contains(code)
+		if ok {
+			break
+		}
+	}
+	if !ok {
+		return codes.Error, false
+	}
+	if category > 0 && category < 4 {
+		return codes.Unset, true
+	}
+	return codes.Error, true
+}
diff --git a/vendor/go.opentelemetry.io/otel/semconv/v1.4.0/resource.go b/vendor/go.opentelemetry.io/otel/semconv/v1.4.0/resource.go
new file mode 100644
index 000000000..d774ed07c
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/semconv/v1.4.0/resource.go
@@ -0,0 +1,825 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated from semantic convention specification. DO NOT EDIT.
+
+package semconv // import "go.opentelemetry.io/otel/semconv/v1.4.0"
+
+import "go.opentelemetry.io/otel/attribute"
+
+// A cloud environment (e.g. GCP, Azure, AWS)
+const (
+	// Name of the cloud provider.
+	//
+	// Type: Enum
+	// Required: No
+	// Examples: 'gcp'
+	CloudProviderKey = attribute.Key("cloud.provider")
+	// The cloud account ID the resource is assigned to.
+	//
+	// Type: string
+	// Required: No
+	// Examples: '111111111111', 'opentelemetry'
+	CloudAccountIDKey = attribute.Key("cloud.account.id")
+	// The geographical region the resource is running. Refer to your provider's docs
+	// to see the available regions, for example [AWS
+	// regions](https://aws.amazon.com/about-aws/global-infrastructure/regions_az/),
+	// [Azure regions](https://azure.microsoft.com/en-us/global-
+	// infrastructure/geographies/), or [Google Cloud
+	// regions](https://cloud.google.com/about/locations).
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'us-central1', 'us-east-1'
+	CloudRegionKey = attribute.Key("cloud.region")
+	// Cloud regions often have multiple, isolated locations known as zones to
+	// increase availability. Availability zone represents the zone where the resource
+	// is running.
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'us-east-1c'
+	// Note: Availability zones are called "zones" on Google Cloud.
+	CloudAvailabilityZoneKey = attribute.Key("cloud.availability_zone")
+	// The cloud platform in use.
+	//
+	// Type: Enum
+	// Required: No
+	// Examples: 'aws_ec2', 'azure_vm', 'gcp_compute_engine'
+	// Note: The prefix of the service SHOULD match the one specified in
+	// `cloud.provider`.
+	CloudPlatformKey = attribute.Key("cloud.platform")
+)
+
+var (
+	// Amazon Web Services
+	CloudProviderAWS = CloudProviderKey.String("aws")
+	// Microsoft Azure
+	CloudProviderAzure = CloudProviderKey.String("azure")
+	// Google Cloud Platform
+	CloudProviderGCP = CloudProviderKey.String("gcp")
+)
+
+var (
+	// AWS Elastic Compute Cloud
+	CloudPlatformAWSEC2 = CloudPlatformKey.String("aws_ec2")
+	// AWS Elastic Container Service
+	CloudPlatformAWSECS = CloudPlatformKey.String("aws_ecs")
+	// AWS Elastic Kubernetes Service
+	CloudPlatformAWSEKS = CloudPlatformKey.String("aws_eks")
+	// AWS Lambda
+	CloudPlatformAWSLambda = CloudPlatformKey.String("aws_lambda")
+	// AWS Elastic Beanstalk
+	CloudPlatformAWSElasticBeanstalk = CloudPlatformKey.String("aws_elastic_beanstalk")
+	// Azure Virtual Machines
+	CloudPlatformAzureVM = CloudPlatformKey.String("azure_vm")
+	// Azure Container Instances
+	CloudPlatformAzureContainerInstances = CloudPlatformKey.String("azure_container_instances")
+	// Azure Kubernetes Service
+	CloudPlatformAzureAKS = CloudPlatformKey.String("azure_aks")
+	// Azure Functions
+	CloudPlatformAzureFunctions = CloudPlatformKey.String("azure_functions")
+	// Azure App Service
+	CloudPlatformAzureAppService = CloudPlatformKey.String("azure_app_service")
+	// Google Cloud Compute Engine (GCE)
+	CloudPlatformGCPComputeEngine = CloudPlatformKey.String("gcp_compute_engine")
+	// Google Cloud Run
+	CloudPlatformGCPCloudRun = CloudPlatformKey.String("gcp_cloud_run")
+	// Google Cloud Kubernetes Engine (GKE)
+	CloudPlatformGCPKubernetesEngine = CloudPlatformKey.String("gcp_kubernetes_engine")
+	// Google Cloud Functions (GCF)
+	CloudPlatformGCPCloudFunctions = CloudPlatformKey.String("gcp_cloud_functions")
+	// Google Cloud App Engine (GAE)
+	CloudPlatformGCPAppEngine = CloudPlatformKey.String("gcp_app_engine")
+)
+
+// Resources used by AWS Elastic Container Service (ECS).
+const (
+	// The Amazon Resource Name (ARN) of an [ECS container instance](https://docs.aws.
+	// amazon.com/AmazonECS/latest/developerguide/ECS_instances.html).
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'arn:aws:ecs:us-
+	// west-1:123456789123:container/32624152-9086-4f0e-acae-1a75b14fe4d9'
+	AWSECSContainerARNKey = attribute.Key("aws.ecs.container.arn")
+	// The ARN of an [ECS cluster](https://docs.aws.amazon.com/AmazonECS/latest/develo
+	// perguide/clusters.html).
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'arn:aws:ecs:us-west-2:123456789123:cluster/my-cluster'
+	AWSECSClusterARNKey = attribute.Key("aws.ecs.cluster.arn")
+	// The [launch type](https://docs.aws.amazon.com/AmazonECS/latest/developerguide/l
+	// aunch_types.html) for an ECS task.
+	//
+	// Type: Enum
+	// Required: No
+	// Examples: 'ec2', 'fargate'
+	AWSECSLaunchtypeKey = attribute.Key("aws.ecs.launchtype")
+	// The ARN of an [ECS task definition](https://docs.aws.amazon.com/AmazonECS/lates
+	// t/developerguide/task_definitions.html).
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'arn:aws:ecs:us-
+	// west-1:123456789123:task/10838bed-421f-43ef-870a-f43feacbbb5b'
+	AWSECSTaskARNKey = attribute.Key("aws.ecs.task.arn")
+	// The task definition family this task definition is a member of.
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'opentelemetry-family'
+	AWSECSTaskFamilyKey = attribute.Key("aws.ecs.task.family")
+	// The revision for this task definition.
+	//
+	// Type: string
+	// Required: No
+	// Examples: '8', '26'
+	AWSECSTaskRevisionKey = attribute.Key("aws.ecs.task.revision")
+)
+
+var (
+	// ec2
+	AWSECSLaunchtypeEC2 = AWSECSLaunchtypeKey.String("ec2")
+	// fargate
+	AWSECSLaunchtypeFargate = AWSECSLaunchtypeKey.String("fargate")
+)
+
+// Resources used by AWS Elastic Kubernetes Service (EKS).
+const (
+	// The ARN of an EKS cluster.
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'arn:aws:ecs:us-west-2:123456789123:cluster/my-cluster'
+	AWSEKSClusterARNKey = attribute.Key("aws.eks.cluster.arn")
+)
+
+// Resources specific to Amazon Web Services.
+const (
+	// The name(s) of the AWS log group(s) an application is writing to.
+	//
+	// Type: string[]
+	// Required: No
+	// Examples: '/aws/lambda/my-function', 'opentelemetry-service'
+	// Note: Multiple log groups must be supported for cases like multi-container
+	// applications, where a single application has sidecar containers, and each write
+	// to their own log group.
+	AWSLogGroupNamesKey = attribute.Key("aws.log.group.names")
+	// The Amazon Resource Name(s) (ARN) of the AWS log group(s).
+	//
+	// Type: string[]
+	// Required: No
+	// Examples: 'arn:aws:logs:us-west-1:123456789012:log-group:/aws/my/group:*'
+	// Note: See the [log group ARN format
+	// documentation](https://docs.aws.amazon.com/AmazonCloudWatch/latest/logs/iam-
+	// access-control-overview-cwl.html#CWL_ARN_Format).
+	AWSLogGroupARNsKey = attribute.Key("aws.log.group.arns")
+	// The name(s) of the AWS log stream(s) an application is writing to.
+	//
+	// Type: string[]
+	// Required: No
+	// Examples: 'logs/main/10838bed-421f-43ef-870a-f43feacbbb5b'
+	AWSLogStreamNamesKey = attribute.Key("aws.log.stream.names")
+	// The ARN(s) of the AWS log stream(s).
+	//
+	// Type: string[]
+	// Required: No
+	// Examples: 'arn:aws:logs:us-west-1:123456789012:log-group:/aws/my/group:log-
+	// stream:logs/main/10838bed-421f-43ef-870a-f43feacbbb5b'
+	// Note: See the [log stream ARN format
+	// documentation](https://docs.aws.amazon.com/AmazonCloudWatch/latest/logs/iam-
+	// access-control-overview-cwl.html#CWL_ARN_Format). One log group can contain
+	// several log streams, so these ARNs necessarily identify both a log group and a
+	// log stream.
+	AWSLogStreamARNsKey = attribute.Key("aws.log.stream.arns")
+)
+
+// A container instance.
+const (
+	// Container name.
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'opentelemetry-autoconf'
+	ContainerNameKey = attribute.Key("container.name")
+	// Container ID. Usually a UUID, as for example used to [identify Docker
+	// containers](https://docs.docker.com/engine/reference/run/#container-
+	// identification). The UUID might be abbreviated.
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'a3bf90e006b2'
+	ContainerIDKey = attribute.Key("container.id")
+	// The container runtime managing this container.
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'docker', 'containerd', 'rkt'
+	ContainerRuntimeKey = attribute.Key("container.runtime")
+	// Name of the image the container was built on.
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'gcr.io/opentelemetry/operator'
+	ContainerImageNameKey = attribute.Key("container.image.name")
+	// Container image tag.
+	//
+	// Type: string
+	// Required: No
+	// Examples: '0.1'
+	ContainerImageTagKey = attribute.Key("container.image.tag")
+)
+
+// The software deployment.
+const (
+	// Name of the [deployment
+	// environment](https://en.wikipedia.org/wiki/Deployment_environment) (aka
+	// deployment tier).
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'staging', 'production'
+	DeploymentEnvironmentKey = attribute.Key("deployment.environment")
+)
+
+// The device on which the process represented by this resource is running.
+const (
+	// A unique identifier representing the device
+	//
+	// Type: string
+	// Required: No
+	// Examples: '2ab2916d-a51f-4ac8-80ee-45ac31a28092'
+	// Note: The device identifier MUST only be defined using the values outlined
+	// below. This value is not an advertising identifier and MUST NOT be used as
+	// such. On iOS (Swift or Objective-C), this value MUST be equal to the [vendor id
+	// entifier](https://developer.apple.com/documentation/uikit/uidevice/1620059-iden
+	// tifierforvendor). On Android (Java or Kotlin), this value MUST be equal to the
+	// Firebase Installation ID or a globally unique UUID which is persisted across
+	// sessions in your application. More information can be found
+	// [here](https://developer.android.com/training/articles/user-data-ids) on best
+	// practices and exact implementation details. Caution should be taken when
+	// storing personal data or anything which can identify a user. GDPR and data
+	// protection laws may apply, ensure you do your own due diligence.
+	DeviceIDKey = attribute.Key("device.id")
+	// The model identifier for the device
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'iPhone3,4', 'SM-G920F'
+	// Note: It's recommended this value represents a machine readable version of the
+	// model identifier rather than the market or consumer-friendly name of the
+	// device.
+	DeviceModelIdentifierKey = attribute.Key("device.model.identifier")
+	// The marketing name for the device model
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'iPhone 6s Plus', 'Samsung Galaxy S6'
+	// Note: It's recommended this value represents a human readable version of the
+	// device model rather than a machine readable alternative.
+	DeviceModelNameKey = attribute.Key("device.model.name")
+)
+
+// A serverless instance.
+const (
+	// The name of the function being executed.
+	//
+	// Type: string
+	// Required: Always
+	// Examples: 'my-function'
+	FaaSNameKey = attribute.Key("faas.name")
+	// The unique ID of the function being executed.
+	//
+	// Type: string
+	// Required: Always
+	// Examples: 'arn:aws:lambda:us-west-2:123456789012:function:my-function'
+	// Note: For example, in AWS Lambda this field corresponds to the
+	// [ARN](https://docs.aws.amazon.com/general/latest/gr/aws-arns-and-
+	// namespaces.html) value, in GCP to the URI of the resource, and in Azure to the
+	// [FunctionDirectory](https://github.com/Azure/azure-functions-
+	// host/wiki/Retrieving-information-about-the-currently-running-function) field.
+	FaaSIDKey = attribute.Key("faas.id")
+	// The version string of the function being executed as defined in [Version
+	// Attributes](../../resource/semantic_conventions/README.md#version-attributes).
+	//
+	// Type: string
+	// Required: No
+	// Examples: '2.0.0'
+	FaaSVersionKey = attribute.Key("faas.version")
+	// The execution environment ID as a string.
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'my-function:instance-0001'
+	FaaSInstanceKey = attribute.Key("faas.instance")
+	// The amount of memory available to the serverless function in MiB.
+	//
+	// Type: int
+	// Required: No
+	// Examples: 128
+	// Note: It's recommended to set this attribute since e.g. too little memory can
+	// easily stop a Java AWS Lambda function from working correctly. On AWS Lambda,
+	// the environment variable `AWS_LAMBDA_FUNCTION_MEMORY_SIZE` provides this
+	// information.
+	FaaSMaxMemoryKey = attribute.Key("faas.max_memory")
+)
+
+// A host is defined as a general computing instance.
+const (
+	// Unique host ID. For Cloud, this must be the instance_id assigned by the cloud
+	// provider.
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'opentelemetry-test'
+	HostIDKey = attribute.Key("host.id")
+	// Name of the host. On Unix systems, it may contain what the hostname command
+	// returns, or the fully qualified hostname, or another name specified by the
+	// user.
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'opentelemetry-test'
+	HostNameKey = attribute.Key("host.name")
+	// Type of host. For Cloud, this must be the machine type.
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'n1-standard-1'
+	HostTypeKey = attribute.Key("host.type")
+	// The CPU architecture the host system is running on.
+	//
+	// Type: Enum
+	// Required: No
+	HostArchKey = attribute.Key("host.arch")
+	// Name of the VM image or OS install the host was instantiated from.
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'infra-ami-eks-worker-node-7d4ec78312', 'CentOS-8-x86_64-1905'
+	HostImageNameKey = attribute.Key("host.image.name")
+	// VM image ID. For Cloud, this value is from the provider.
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'ami-07b06b442921831e5'
+	HostImageIDKey = attribute.Key("host.image.id")
+	// The version string of the VM image as defined in [Version
+	// Attributes](README.md#version-attributes).
+	//
+	// Type: string
+	// Required: No
+	// Examples: '0.1'
+	HostImageVersionKey = attribute.Key("host.image.version")
+)
+
+var (
+	// AMD64
+	HostArchAMD64 = HostArchKey.String("amd64")
+	// ARM32
+	HostArchARM32 = HostArchKey.String("arm32")
+	// ARM64
+	HostArchARM64 = HostArchKey.String("arm64")
+	// Itanium
+	HostArchIA64 = HostArchKey.String("ia64")
+	// 32-bit PowerPC
+	HostArchPPC32 = HostArchKey.String("ppc32")
+	// 64-bit PowerPC
+	HostArchPPC64 = HostArchKey.String("ppc64")
+	// 32-bit x86
+	HostArchX86 = HostArchKey.String("x86")
+)
+
+// A Kubernetes Cluster.
+const (
+	// The name of the cluster.
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'opentelemetry-cluster'
+	K8SClusterNameKey = attribute.Key("k8s.cluster.name")
+)
+
+// A Kubernetes Node object.
+const (
+	// The name of the Node.
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'node-1'
+	K8SNodeNameKey = attribute.Key("k8s.node.name")
+	// The UID of the Node.
+	//
+	// Type: string
+	// Required: No
+	// Examples: '1eb3a0c6-0477-4080-a9cb-0cb7db65c6a2'
+	K8SNodeUIDKey = attribute.Key("k8s.node.uid")
+)
+
+// A Kubernetes Namespace.
+const (
+	// The name of the namespace that the pod is running in.
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'default'
+	K8SNamespaceNameKey = attribute.Key("k8s.namespace.name")
+)
+
+// A Kubernetes Pod object.
+const (
+	// The UID of the Pod.
+	//
+	// Type: string
+	// Required: No
+	// Examples: '275ecb36-5aa8-4c2a-9c47-d8bb681b9aff'
+	K8SPodUIDKey = attribute.Key("k8s.pod.uid")
+	// The name of the Pod.
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'opentelemetry-pod-autoconf'
+	K8SPodNameKey = attribute.Key("k8s.pod.name")
+)
+
+// A container in a [PodTemplate](https://kubernetes.io/docs/concepts/workloads/pods/#pod-templates).
+const (
+	// The name of the Container in a Pod template.
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'redis'
+	K8SContainerNameKey = attribute.Key("k8s.container.name")
+)
+
+// A Kubernetes ReplicaSet object.
+const (
+	// The UID of the ReplicaSet.
+	//
+	// Type: string
+	// Required: No
+	// Examples: '275ecb36-5aa8-4c2a-9c47-d8bb681b9aff'
+	K8SReplicasetUIDKey = attribute.Key("k8s.replicaset.uid")
+	// The name of the ReplicaSet.
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'opentelemetry'
+	K8SReplicasetNameKey = attribute.Key("k8s.replicaset.name")
+)
+
+// A Kubernetes Deployment object.
+const (
+	// The UID of the Deployment.
+	//
+	// Type: string
+	// Required: No
+	// Examples: '275ecb36-5aa8-4c2a-9c47-d8bb681b9aff'
+	K8SDeploymentUIDKey = attribute.Key("k8s.deployment.uid")
+	// The name of the Deployment.
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'opentelemetry'
+	K8SDeploymentNameKey = attribute.Key("k8s.deployment.name")
+)
+
+// A Kubernetes StatefulSet object.
+const (
+	// The UID of the StatefulSet.
+	//
+	// Type: string
+	// Required: No
+	// Examples: '275ecb36-5aa8-4c2a-9c47-d8bb681b9aff'
+	K8SStatefulsetUIDKey = attribute.Key("k8s.statefulset.uid")
+	// The name of the StatefulSet.
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'opentelemetry'
+	K8SStatefulsetNameKey = attribute.Key("k8s.statefulset.name")
+)
+
+// A Kubernetes DaemonSet object.
+const (
+	// The UID of the DaemonSet.
+	//
+	// Type: string
+	// Required: No
+	// Examples: '275ecb36-5aa8-4c2a-9c47-d8bb681b9aff'
+	K8SDaemonsetUIDKey = attribute.Key("k8s.daemonset.uid")
+	// The name of the DaemonSet.
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'opentelemetry'
+	K8SDaemonsetNameKey = attribute.Key("k8s.daemonset.name")
+)
+
+// A Kubernetes Job object.
+const (
+	// The UID of the Job.
+	//
+	// Type: string
+	// Required: No
+	// Examples: '275ecb36-5aa8-4c2a-9c47-d8bb681b9aff'
+	K8SJobUIDKey = attribute.Key("k8s.job.uid")
+	// The name of the Job.
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'opentelemetry'
+	K8SJobNameKey = attribute.Key("k8s.job.name")
+)
+
+// A Kubernetes CronJob object.
+const (
+	// The UID of the CronJob.
+	//
+	// Type: string
+	// Required: No
+	// Examples: '275ecb36-5aa8-4c2a-9c47-d8bb681b9aff'
+	K8SCronJobUIDKey = attribute.Key("k8s.cronjob.uid")
+	// The name of the CronJob.
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'opentelemetry'
+	K8SCronJobNameKey = attribute.Key("k8s.cronjob.name")
+)
+
+// The operating system (OS) on which the process represented by this resource is running.
+const (
+	// The operating system type.
+	//
+	// Type: Enum
+	// Required: Always
+	OSTypeKey = attribute.Key("os.type")
+	// Human readable (not intended to be parsed) OS version information, like e.g.
+	// reported by `ver` or `lsb_release -a` commands.
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'Microsoft Windows [Version 10.0.18363.778]', 'Ubuntu 18.04.1 LTS'
+	OSDescriptionKey = attribute.Key("os.description")
+	// Human readable operating system name.
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'iOS', 'Android', 'Ubuntu'
+	OSNameKey = attribute.Key("os.name")
+	// The version string of the operating system as defined in [Version
+	// Attributes](../../resource/semantic_conventions/README.md#version-attributes).
+	//
+	// Type: string
+	// Required: No
+	// Examples: '14.2.1', '18.04.1'
+	OSVersionKey = attribute.Key("os.version")
+)
+
+var (
+	// Microsoft Windows
+	OSTypeWindows = OSTypeKey.String("windows")
+	// Linux
+	OSTypeLinux = OSTypeKey.String("linux")
+	// Apple Darwin
+	OSTypeDarwin = OSTypeKey.String("darwin")
+	// FreeBSD
+	OSTypeFreeBSD = OSTypeKey.String("freebsd")
+	// NetBSD
+	OSTypeNetBSD = OSTypeKey.String("netbsd")
+	// OpenBSD
+	OSTypeOpenBSD = OSTypeKey.String("openbsd")
+	// DragonFly BSD
+	OSTypeDragonflyBSD = OSTypeKey.String("dragonflybsd")
+	// HP-UX (Hewlett Packard Unix)
+	OSTypeHPUX = OSTypeKey.String("hpux")
+	// AIX (Advanced Interactive eXecutive)
+	OSTypeAIX = OSTypeKey.String("aix")
+	// Oracle Solaris
+	OSTypeSolaris = OSTypeKey.String("solaris")
+	// IBM z/OS
+	OSTypeZOS = OSTypeKey.String("z_os")
+)
+
+// An operating system process.
+const (
+	// Process identifier (PID).
+	//
+	// Type: int
+	// Required: No
+	// Examples: 1234
+	ProcessPIDKey = attribute.Key("process.pid")
+	// The name of the process executable. On Linux based systems, can be set to the
+	// `Name` in `proc/[pid]/status`. On Windows, can be set to the base name of
+	// `GetProcessImageFileNameW`.
+	//
+	// Type: string
+	// Required: See below
+	// Examples: 'otelcol'
+	ProcessExecutableNameKey = attribute.Key("process.executable.name")
+	// The full path to the process executable. On Linux based systems, can be set to
+	// the target of `proc/[pid]/exe`. On Windows, can be set to the result of
+	// `GetProcessImageFileNameW`.
+	//
+	// Type: string
+	// Required: See below
+	// Examples: '/usr/bin/cmd/otelcol'
+	ProcessExecutablePathKey = attribute.Key("process.executable.path")
+	// The command used to launch the process (i.e. the command name). On Linux based
+	// systems, can be set to the zeroth string in `proc/[pid]/cmdline`. On Windows,
+	// can be set to the first parameter extracted from `GetCommandLineW`.
+	//
+	// Type: string
+	// Required: See below
+	// Examples: 'cmd/otelcol'
+	ProcessCommandKey = attribute.Key("process.command")
+	// The full command used to launch the process as a single string representing the
+	// full command. On Windows, can be set to the result of `GetCommandLineW`. Do not
+	// set this if you have to assemble it just for monitoring; use
+	// `process.command_args` instead.
+	//
+	// Type: string
+	// Required: See below
+	// Examples: 'C:\\cmd\\otecol --config="my directory\\config.yaml"'
+	ProcessCommandLineKey = attribute.Key("process.command_line")
+	// All the command arguments (including the command/executable itself) as received
+	// by the process. On Linux-based systems (and some other Unixoid systems
+	// supporting procfs), can be set according to the list of null-delimited strings
+	// extracted from `proc/[pid]/cmdline`. For libc-based executables, this would be
+	// the full argv vector passed to `main`.
+	//
+	// Type: string[]
+	// Required: See below
+	// Examples: 'cmd/otecol', '--config=config.yaml'
+	ProcessCommandArgsKey = attribute.Key("process.command_args")
+	// The username of the user that owns the process.
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'root'
+	ProcessOwnerKey = attribute.Key("process.owner")
+)
+
+// The single (language) runtime instance which is monitored.
+const (
+	// The name of the runtime of this process. For compiled native binaries, this
+	// SHOULD be the name of the compiler.
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'OpenJDK Runtime Environment'
+	ProcessRuntimeNameKey = attribute.Key("process.runtime.name")
+	// The version of the runtime of this process, as returned by the runtime without
+	// modification.
+	//
+	// Type: string
+	// Required: No
+	// Examples: '14.0.2'
+	ProcessRuntimeVersionKey = attribute.Key("process.runtime.version")
+	// An additional description about the runtime of the process, for example a
+	// specific vendor customization of the runtime environment.
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'Eclipse OpenJ9 Eclipse OpenJ9 VM openj9-0.21.0'
+	ProcessRuntimeDescriptionKey = attribute.Key("process.runtime.description")
+)
+
+// A service instance.
+const (
+	// Logical name of the service.
+	//
+	// Type: string
+	// Required: Always
+	// Examples: 'shoppingcart'
+	// Note: MUST be the same for all instances of horizontally scaled services. If
+	// the value was not specified, SDKs MUST fallback to `unknown_service:`
+	// concatenated with [`process.executable.name`](process.md#process), e.g.
+	// `unknown_service:bash`. If `process.executable.name` is not available, the
+	// value MUST be set to `unknown_service`.
+	ServiceNameKey = attribute.Key("service.name")
+	// A namespace for `service.name`.
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'Shop'
+	// Note: A string value having a meaning that helps to distinguish a group of
+	// services, for example the team name that owns a group of services.
+	// `service.name` is expected to be unique within the same namespace. If
+	// `service.namespace` is not specified in the Resource then `service.name` is
+	// expected to be unique for all services that have no explicit namespace defined
+	// (so the empty/unspecified namespace is simply one more valid namespace). Zero-
+	// length namespace string is assumed equal to unspecified namespace.
+	ServiceNamespaceKey = attribute.Key("service.namespace")
+	// The string ID of the service instance.
+	//
+	// Type: string
+	// Required: No
+	// Examples: '627cc493-f310-47de-96bd-71410b7dec09'
+	// Note: MUST be unique for each instance of the same
+	// `service.namespace,service.name` pair (in other words
+	// `service.namespace,service.name,service.instance.id` triplet MUST be globally
+	// unique). The ID helps to distinguish instances of the same service that exist
+	// at the same time (e.g. instances of a horizontally scaled service). It is
+	// preferable for the ID to be persistent and stay the same for the lifetime of
+	// the service instance, however it is acceptable that the ID is ephemeral and
+	// changes during important lifetime events for the service (e.g. service
+	// restarts). If the service has no inherent unique ID that can be used as the
+	// value of this attribute it is recommended to generate a random Version 1 or
+	// Version 4 RFC 4122 UUID (services aiming for reproducible UUIDs may also use
+	// Version 5, see RFC 4122 for more recommendations).
+	ServiceInstanceIDKey = attribute.Key("service.instance.id")
+	// The version string of the service API or implementation.
+	//
+	// Type: string
+	// Required: No
+	// Examples: '2.0.0'
+	ServiceVersionKey = attribute.Key("service.version")
+)
+
+// The telemetry SDK used to capture data recorded by the instrumentation libraries.
+const (
+	// The name of the telemetry SDK as defined above.
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'opentelemetry'
+	TelemetrySDKNameKey = attribute.Key("telemetry.sdk.name")
+	// The language of the telemetry SDK.
+	//
+	// Type: Enum
+	// Required: No
+	TelemetrySDKLanguageKey = attribute.Key("telemetry.sdk.language")
+	// The version string of the telemetry SDK.
+	//
+	// Type: string
+	// Required: No
+	// Examples: '1.2.3'
+	TelemetrySDKVersionKey = attribute.Key("telemetry.sdk.version")
+	// The version string of the auto instrumentation agent, if used.
+	//
+	// Type: string
+	// Required: No
+	// Examples: '1.2.3'
+	TelemetryAutoVersionKey = attribute.Key("telemetry.auto.version")
+)
+
+var (
+	// cpp
+	TelemetrySDKLanguageCpp = TelemetrySDKLanguageKey.String("cpp")
+	// dotnet
+	TelemetrySDKLanguageDotnet = TelemetrySDKLanguageKey.String("dotnet")
+	// erlang
+	TelemetrySDKLanguageErlang = TelemetrySDKLanguageKey.String("erlang")
+	// go
+	TelemetrySDKLanguageGo = TelemetrySDKLanguageKey.String("go")
+	// java
+	TelemetrySDKLanguageJava = TelemetrySDKLanguageKey.String("java")
+	// nodejs
+	TelemetrySDKLanguageNodejs = TelemetrySDKLanguageKey.String("nodejs")
+	// php
+	TelemetrySDKLanguagePHP = TelemetrySDKLanguageKey.String("php")
+	// python
+	TelemetrySDKLanguagePython = TelemetrySDKLanguageKey.String("python")
+	// ruby
+	TelemetrySDKLanguageRuby = TelemetrySDKLanguageKey.String("ruby")
+	// webjs
+	TelemetrySDKLanguageWebjs = TelemetrySDKLanguageKey.String("webjs")
+)
+
+// Resource describing the packaged software running the application code. Web engines are typically executed using process.runtime.
+const (
+	// The name of the web engine.
+	//
+	// Type: string
+	// Required: Always
+	// Examples: 'WildFly'
+	WebEngineNameKey = attribute.Key("webengine.name")
+	// The version of the web engine.
+	//
+	// Type: string
+	// Required: No
+	// Examples: '21.0.0'
+	WebEngineVersionKey = attribute.Key("webengine.version")
+	// Additional description of the web engine (e.g. detailed version and edition
+	// information).
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'WildFly Full 21.0.0.Final (WildFly Core 13.0.1.Final) - 2.2.2.Final'
+	WebEngineDescriptionKey = attribute.Key("webengine.description")
+)
diff --git a/vendor/go.opentelemetry.io/otel/semconv/v1.4.0/schema.go b/vendor/go.opentelemetry.io/otel/semconv/v1.4.0/schema.go
new file mode 100644
index 000000000..41079980e
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/semconv/v1.4.0/schema.go
@@ -0,0 +1,20 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package semconv
+
+// SchemaURL is the schema URL that matches the version of the semantic conventions
+// that this package defines. Semconv packages starting from v1.4.0 must declare
+// non-empty schema URL in the form https://opentelemetry.io/schemas/<version>
+const SchemaURL = "https://opentelemetry.io/schemas/v1.4.0"
diff --git a/vendor/go.opentelemetry.io/otel/semconv/v1.4.0/trace.go b/vendor/go.opentelemetry.io/otel/semconv/v1.4.0/trace.go
new file mode 100644
index 000000000..378282e08
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/semconv/v1.4.0/trace.go
@@ -0,0 +1,1261 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated from semantic convention specification. DO NOT EDIT.
+
+package semconv // import "go.opentelemetry.io/otel/semconv/v1.4.0"
+
+import "go.opentelemetry.io/otel/attribute"
+
+// This document defines the attributes used to perform database client calls.
+const (
+	// An identifier for the database management system (DBMS) product being used. See
+	// below for a list of well-known identifiers.
+	//
+	// Type: Enum
+	// Required: Always
+	DBSystemKey = attribute.Key("db.system")
+	// The connection string used to connect to the database. It is recommended to
+	// remove embedded credentials.
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'Server=(localdb)\\v11.0;Integrated Security=true;'
+	DBConnectionStringKey = attribute.Key("db.connection_string")
+	// Username for accessing the database.
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'readonly_user', 'reporting_user'
+	DBUserKey = attribute.Key("db.user")
+	// The fully-qualified class name of the [Java Database Connectivity
+	// (JDBC)](https://docs.oracle.com/javase/8/docs/technotes/guides/jdbc/) driver
+	// used to connect.
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'org.postgresql.Driver',
+	// 'com.microsoft.sqlserver.jdbc.SQLServerDriver'
+	DBJDBCDriverClassnameKey = attribute.Key("db.jdbc.driver_classname")
+	// If no [tech-specific attribute](#call-level-attributes-for-specific-
+	// technologies) is defined, this attribute is used to report the name of the
+	// database being accessed. For commands that switch the database, this should be
+	// set to the target database (even if the command fails).
+	//
+	// Type: string
+	// Required: Required, if applicable and no more-specific attribute is defined.
+	// Examples: 'customers', 'main'
+	// Note: In some SQL databases, the database name to be used is called "schema
+	// name".
+	DBNameKey = attribute.Key("db.name")
+	// The database statement being executed.
+	//
+	// Type: string
+	// Required: Required if applicable and not explicitly disabled via
+	// instrumentation configuration.
+	// Examples: 'SELECT * FROM wuser_table', 'SET mykey "WuValue"'
+	// Note: The value may be sanitized to exclude sensitive information.
+	DBStatementKey = attribute.Key("db.statement")
+	// The name of the operation being executed, e.g. the [MongoDB command
+	// name](https://docs.mongodb.com/manual/reference/command/#database-operations)
+	// such as `findAndModify`, or the SQL keyword.
+	//
+	// Type: string
+	// Required: Required, if `db.statement` is not applicable.
+	// Examples: 'findAndModify', 'HMSET', 'SELECT'
+	// Note: When setting this to an SQL keyword, it is not recommended to attempt any
+	// client-side parsing of `db.statement` just to get this property, but it should
+	// be set if the operation name is provided by the library being instrumented. If
+	// the SQL statement has an ambiguous operation, or performs more than one
+	// operation, this value may be omitted.
+	DBOperationKey = attribute.Key("db.operation")
+)
+
+var (
+	// Some other SQL database. Fallback only. See notes
+	DBSystemOtherSQL = DBSystemKey.String("other_sql")
+	// Microsoft SQL Server
+	DBSystemMSSQL = DBSystemKey.String("mssql")
+	// MySQL
+	DBSystemMySQL = DBSystemKey.String("mysql")
+	// Oracle Database
+	DBSystemOracle = DBSystemKey.String("oracle")
+	// IBM DB2
+	DBSystemDB2 = DBSystemKey.String("db2")
+	// PostgreSQL
+	DBSystemPostgreSQL = DBSystemKey.String("postgresql")
+	// Amazon Redshift
+	DBSystemRedshift = DBSystemKey.String("redshift")
+	// Apache Hive
+	DBSystemHive = DBSystemKey.String("hive")
+	// Cloudscape
+	DBSystemCloudscape = DBSystemKey.String("cloudscape")
+	// HyperSQL DataBase
+	DBSystemHSQLDB = DBSystemKey.String("hsqldb")
+	// Progress Database
+	DBSystemProgress = DBSystemKey.String("progress")
+	// SAP MaxDB
+	DBSystemMaxDB = DBSystemKey.String("maxdb")
+	// SAP HANA
+	DBSystemHanaDB = DBSystemKey.String("hanadb")
+	// Ingres
+	DBSystemIngres = DBSystemKey.String("ingres")
+	// FirstSQL
+	DBSystemFirstSQL = DBSystemKey.String("firstsql")
+	// EnterpriseDB
+	DBSystemEDB = DBSystemKey.String("edb")
+	// InterSystems Caché
+	DBSystemCache = DBSystemKey.String("cache")
+	// Adabas (Adaptable Database System)
+	DBSystemAdabas = DBSystemKey.String("adabas")
+	// Firebird
+	DBSystemFirebird = DBSystemKey.String("firebird")
+	// Apache Derby
+	DBSystemDerby = DBSystemKey.String("derby")
+	// FileMaker
+	DBSystemFilemaker = DBSystemKey.String("filemaker")
+	// Informix
+	DBSystemInformix = DBSystemKey.String("informix")
+	// InstantDB
+	DBSystemInstantDB = DBSystemKey.String("instantdb")
+	// InterBase
+	DBSystemInterbase = DBSystemKey.String("interbase")
+	// MariaDB
+	DBSystemMariaDB = DBSystemKey.String("mariadb")
+	// Netezza
+	DBSystemNetezza = DBSystemKey.String("netezza")
+	// Pervasive PSQL
+	DBSystemPervasive = DBSystemKey.String("pervasive")
+	// PointBase
+	DBSystemPointbase = DBSystemKey.String("pointbase")
+	// SQLite
+	DBSystemSqlite = DBSystemKey.String("sqlite")
+	// Sybase
+	DBSystemSybase = DBSystemKey.String("sybase")
+	// Teradata
+	DBSystemTeradata = DBSystemKey.String("teradata")
+	// Vertica
+	DBSystemVertica = DBSystemKey.String("vertica")
+	// H2
+	DBSystemH2 = DBSystemKey.String("h2")
+	// ColdFusion IMQ
+	DBSystemColdfusion = DBSystemKey.String("coldfusion")
+	// Apache Cassandra
+	DBSystemCassandra = DBSystemKey.String("cassandra")
+	// Apache HBase
+	DBSystemHBase = DBSystemKey.String("hbase")
+	// MongoDB
+	DBSystemMongoDB = DBSystemKey.String("mongodb")
+	// Redis
+	DBSystemRedis = DBSystemKey.String("redis")
+	// Couchbase
+	DBSystemCouchbase = DBSystemKey.String("couchbase")
+	// CouchDB
+	DBSystemCouchDB = DBSystemKey.String("couchdb")
+	// Microsoft Azure Cosmos DB
+	DBSystemCosmosDB = DBSystemKey.String("cosmosdb")
+	// Amazon DynamoDB
+	DBSystemDynamoDB = DBSystemKey.String("dynamodb")
+	// Neo4j
+	DBSystemNeo4j = DBSystemKey.String("neo4j")
+	// Apache Geode
+	DBSystemGeode = DBSystemKey.String("geode")
+	// Elasticsearch
+	DBSystemElasticsearch = DBSystemKey.String("elasticsearch")
+	// Memcached
+	DBSystemMemcached = DBSystemKey.String("memcached")
+	// CockroachDB
+	DBSystemCockroachdb = DBSystemKey.String("cockroachdb")
+)
+
+// Connection-level attributes for Microsoft SQL Server
+const (
+	// The Microsoft SQL Server [instance name](https://docs.microsoft.com/en-
+	// us/sql/connect/jdbc/building-the-connection-url?view=sql-server-ver15)
+	// connecting to. This name is used to determine the port of a named instance.
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'MSSQLSERVER'
+	// Note: If setting a `db.mssql.instance_name`, `net.peer.port` is no longer
+	// required (but still recommended if non-standard).
+	DBMSSQLInstanceNameKey = attribute.Key("db.mssql.instance_name")
+)
+
+// Call-level attributes for Cassandra
+const (
+	// The name of the keyspace being accessed. To be used instead of the generic
+	// `db.name` attribute.
+	//
+	// Type: string
+	// Required: Always
+	// Examples: 'mykeyspace'
+	DBCassandraKeyspaceKey = attribute.Key("db.cassandra.keyspace")
+	// The fetch size used for paging, i.e. how many rows will be returned at once.
+	//
+	// Type: int
+	// Required: No
+	// Examples: 5000
+	DBCassandraPageSizeKey = attribute.Key("db.cassandra.page_size")
+	// The consistency level of the query. Based on consistency values from
+	// [CQL](https://docs.datastax.com/en/cassandra-
+	// oss/3.0/cassandra/dml/dmlConfigConsistency.html).
+	//
+	// Type: Enum
+	// Required: No
+	DBCassandraConsistencyLevelKey = attribute.Key("db.cassandra.consistency_level")
+	// The name of the primary table that the operation is acting upon, including the
+	// schema name (if applicable).
+	//
+	// Type: string
+	// Required: Recommended if available.
+	// Examples: 'mytable'
+	// Note: This mirrors the db.sql.table attribute but references cassandra rather
+	// than sql. It is not recommended to attempt any client-side parsing of
+	// `db.statement` just to get this property, but it should be set if it is
+	// provided by the library being instrumented. If the operation is acting upon an
+	// anonymous table, or more than one table, this value MUST NOT be set.
+	DBCassandraTableKey = attribute.Key("db.cassandra.table")
+	// Whether or not the query is idempotent.
+	//
+	// Type: boolean
+	// Required: No
+	DBCassandraIdempotenceKey = attribute.Key("db.cassandra.idempotence")
+	// The number of times a query was speculatively executed. Not set or `0` if the
+	// query was not executed speculatively.
+	//
+	// Type: int
+	// Required: No
+	// Examples: 0, 2
+	DBCassandraSpeculativeExecutionCountKey = attribute.Key("db.cassandra.speculative_execution_count")
+	// The ID of the coordinating node for a query.
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'be13faa2-8574-4d71-926d-27f16cf8a7af'
+	DBCassandraCoordinatorIDKey = attribute.Key("db.cassandra.coordinator.id")
+	// The data center of the coordinating node for a query.
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'us-west-2'
+	DBCassandraCoordinatorDCKey = attribute.Key("db.cassandra.coordinator.dc")
+)
+
+var (
+	// all
+	DBCassandraConsistencyLevelAll = DBCassandraConsistencyLevelKey.String("all")
+	// each_quorum
+	DBCassandraConsistencyLevelEachQuorum = DBCassandraConsistencyLevelKey.String("each_quorum")
+	// quorum
+	DBCassandraConsistencyLevelQuorum = DBCassandraConsistencyLevelKey.String("quorum")
+	// local_quorum
+	DBCassandraConsistencyLevelLocalQuorum = DBCassandraConsistencyLevelKey.String("local_quorum")
+	// one
+	DBCassandraConsistencyLevelOne = DBCassandraConsistencyLevelKey.String("one")
+	// two
+	DBCassandraConsistencyLevelTwo = DBCassandraConsistencyLevelKey.String("two")
+	// three
+	DBCassandraConsistencyLevelThree = DBCassandraConsistencyLevelKey.String("three")
+	// local_one
+	DBCassandraConsistencyLevelLocalOne = DBCassandraConsistencyLevelKey.String("local_one")
+	// any
+	DBCassandraConsistencyLevelAny = DBCassandraConsistencyLevelKey.String("any")
+	// serial
+	DBCassandraConsistencyLevelSerial = DBCassandraConsistencyLevelKey.String("serial")
+	// local_serial
+	DBCassandraConsistencyLevelLocalSerial = DBCassandraConsistencyLevelKey.String("local_serial")
+)
+
+// Call-level attributes for Apache HBase
+const (
+	// The [HBase namespace](https://hbase.apache.org/book.html#_namespace) being
+	// accessed. To be used instead of the generic `db.name` attribute.
+	//
+	// Type: string
+	// Required: Always
+	// Examples: 'default'
+	DBHBaseNamespaceKey = attribute.Key("db.hbase.namespace")
+)
+
+// Call-level attributes for Redis
+const (
+	// The index of the database being accessed as used in the [`SELECT`
+	// command](https://redis.io/commands/select), provided as an integer. To be used
+	// instead of the generic `db.name` attribute.
+	//
+	// Type: int
+	// Required: Required, if other than the default database (`0`).
+	// Examples: 0, 1, 15
+	DBRedisDBIndexKey = attribute.Key("db.redis.database_index")
+)
+
+// Call-level attributes for MongoDB
+const (
+	// The collection being accessed within the database stated in `db.name`.
+	//
+	// Type: string
+	// Required: Always
+	// Examples: 'customers', 'products'
+	DBMongoDBCollectionKey = attribute.Key("db.mongodb.collection")
+)
+
+// Call-level attrbiutes for SQL databases
+const (
+	// The name of the primary table that the operation is acting upon, including the
+	// schema name (if applicable).
+	//
+	// Type: string
+	// Required: Recommended if available.
+	// Examples: 'public.users', 'customers'
+	// Note: It is not recommended to attempt any client-side parsing of
+	// `db.statement` just to get this property, but it should be set if it is
+	// provided by the library being instrumented. If the operation is acting upon an
+	// anonymous table, or more than one table, this value MUST NOT be set.
+	DBSQLTableKey = attribute.Key("db.sql.table")
+)
+
+// This document defines the attributes used to report a single exception associated with a span.
+const (
+	// The type of the exception (its fully-qualified class name, if applicable). The
+	// dynamic type of the exception should be preferred over the static type in
+	// languages that support it.
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'java.net.ConnectException', 'OSError'
+	ExceptionTypeKey = attribute.Key("exception.type")
+	// The exception message.
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'Division by zero', "Can't convert 'int' object to str implicitly"
+	ExceptionMessageKey = attribute.Key("exception.message")
+	// A stacktrace as a string in the natural representation for the language
+	// runtime. The representation is to be determined and documented by each language
+	// SIG.
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'Exception in thread "main" java.lang.RuntimeException: Test
+	// exception\\n at '
+	//  'com.example.GenerateTrace.methodB(GenerateTrace.java:13)\\n at '
+	//  'com.example.GenerateTrace.methodA(GenerateTrace.java:9)\\n at '
+	//  'com.example.GenerateTrace.main(GenerateTrace.java:5)'
+	ExceptionStacktraceKey = attribute.Key("exception.stacktrace")
+	// SHOULD be set to true if the exception event is recorded at a point where it is
+	// known that the exception is escaping the scope of the span.
+	//
+	// Type: boolean
+	// Required: No
+	// Note: An exception is considered to have escaped (or left) the scope of a span,
+	// if that span is ended while the exception is still logically "in flight".
+	// This may be actually "in flight" in some languages (e.g. if the exception
+	// is passed to a Context manager's `__exit__` method in Python) but will
+	// usually be caught at the point of recording the exception in most languages.
+
+	// It is usually not possible to determine at the point where an exception is
+	// thrown
+	// whether it will escape the scope of a span.
+	// However, it is trivial to know that an exception
+	// will escape, if one checks for an active exception just before ending the span,
+	// as done in the [example above](#exception-end-example).
+
+	// It follows that an exception may still escape the scope of the span
+	// even if the `exception.escaped` attribute was not set or set to false,
+	// since the event might have been recorded at a time where it was not
+	// clear whether the exception will escape.
+	ExceptionEscapedKey = attribute.Key("exception.escaped")
+)
+
+// This semantic convention describes an instance of a function that runs without provisioning or managing of servers (also known as serverless functions or Function as a Service (FaaS)) with spans.
+const (
+	// Type of the trigger on which the function is executed.
+	//
+	// Type: Enum
+	// Required: On FaaS instances, faas.trigger MUST be set on incoming invocations.
+	// Clients invoking FaaS instances MUST set `faas.trigger` on outgoing
+	// invocations, if it is known to the client. This is, for example, not the case,
+	// when the transport layer is abstracted in a FaaS client framework without
+	// access to its configuration.
+	FaaSTriggerKey = attribute.Key("faas.trigger")
+	// The execution ID of the current function execution.
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'af9d5aa4-a685-4c5f-a22b-444f80b3cc28'
+	FaaSExecutionKey = attribute.Key("faas.execution")
+)
+
+var (
+	// A response to some data source operation such as a database or filesystem read/write
+	FaaSTriggerDatasource = FaaSTriggerKey.String("datasource")
+	// To provide an answer to an inbound HTTP request
+	FaaSTriggerHTTP = FaaSTriggerKey.String("http")
+	// A function is set to be executed when messages are sent to a messaging system
+	FaaSTriggerPubsub = FaaSTriggerKey.String("pubsub")
+	// A function is scheduled to be executed regularly
+	FaaSTriggerTimer = FaaSTriggerKey.String("timer")
+	// If none of the others apply
+	FaaSTriggerOther = FaaSTriggerKey.String("other")
+)
+
+// Semantic Convention for FaaS triggered as a response to some data source operation such as a database or filesystem read/write.
+const (
+	// The name of the source on which the triggering operation was performed. For
+	// example, in Cloud Storage or S3 corresponds to the bucket name, and in Cosmos
+	// DB to the database name.
+	//
+	// Type: string
+	// Required: Always
+	// Examples: 'myBucketName', 'myDBName'
+	FaaSDocumentCollectionKey = attribute.Key("faas.document.collection")
+	// Describes the type of the operation that was performed on the data.
+	//
+	// Type: Enum
+	// Required: Always
+	FaaSDocumentOperationKey = attribute.Key("faas.document.operation")
+	// A string containing the time when the data was accessed in the [ISO
+	// 8601](https://www.iso.org/iso-8601-date-and-time-format.html) format expressed
+	// in [UTC](https://www.w3.org/TR/NOTE-datetime).
+	//
+	// Type: string
+	// Required: Always
+	// Examples: '2020-01-23T13:47:06Z'
+	FaaSDocumentTimeKey = attribute.Key("faas.document.time")
+	// The document name/table subjected to the operation. For example, in Cloud
+	// Storage or S3 is the name of the file, and in Cosmos DB the table name.
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'myFile.txt', 'myTableName'
+	FaaSDocumentNameKey = attribute.Key("faas.document.name")
+)
+
+var (
+	// When a new object is created
+	FaaSDocumentOperationInsert = FaaSDocumentOperationKey.String("insert")
+	// When an object is modified
+	FaaSDocumentOperationEdit = FaaSDocumentOperationKey.String("edit")
+	// When an object is deleted
+	FaaSDocumentOperationDelete = FaaSDocumentOperationKey.String("delete")
+)
+
+// Semantic Convention for FaaS scheduled to be executed regularly.
+const (
+	// A string containing the function invocation time in the [ISO
+	// 8601](https://www.iso.org/iso-8601-date-and-time-format.html) format expressed
+	// in [UTC](https://www.w3.org/TR/NOTE-datetime).
+	//
+	// Type: string
+	// Required: Always
+	// Examples: '2020-01-23T13:47:06Z'
+	FaaSTimeKey = attribute.Key("faas.time")
+	// A string containing the schedule period as [Cron Expression](https://docs.oracl
+	// e.com/cd/E12058_01/doc/doc.1014/e12030/cron_expressions.htm).
+	//
+	// Type: string
+	// Required: No
+	// Examples: '0/5 * * * ? *'
+	FaaSCronKey = attribute.Key("faas.cron")
+)
+
+// Contains additional attributes for incoming FaaS spans.
+const (
+	// A boolean that is true if the serverless function is executed for the first
+	// time (aka cold-start).
+	//
+	// Type: boolean
+	// Required: No
+	FaaSColdstartKey = attribute.Key("faas.coldstart")
+)
+
+// Contains additional attributes for outgoing FaaS spans.
+const (
+	// The name of the invoked function.
+	//
+	// Type: string
+	// Required: Always
+	// Examples: 'my-function'
+	// Note: SHOULD be equal to the `faas.name` resource attribute of the invoked
+	// function.
+	FaaSInvokedNameKey = attribute.Key("faas.invoked_name")
+	// The cloud provider of the invoked function.
+	//
+	// Type: Enum
+	// Required: Always
+	// Examples: 'aws'
+	// Note: SHOULD be equal to the `cloud.provider` resource attribute of the invoked
+	// function.
+	FaaSInvokedProviderKey = attribute.Key("faas.invoked_provider")
+	// The cloud region of the invoked function.
+	//
+	// Type: string
+	// Required: For some cloud providers, like AWS or GCP, the region in which a
+	// function is hosted is essential to uniquely identify the function and also part
+	// of its endpoint. Since it's part of the endpoint being called, the region is
+	// always known to clients. In these cases, `faas.invoked_region` MUST be set
+	// accordingly. If the region is unknown to the client or not required for
+	// identifying the invoked function, setting `faas.invoked_region` is optional.
+	// Examples: 'eu-central-1'
+	// Note: SHOULD be equal to the `cloud.region` resource attribute of the invoked
+	// function.
+	FaaSInvokedRegionKey = attribute.Key("faas.invoked_region")
+)
+
+var (
+	// Amazon Web Services
+	FaaSInvokedProviderAWS = FaaSInvokedProviderKey.String("aws")
+	// Microsoft Azure
+	FaaSInvokedProviderAzure = FaaSInvokedProviderKey.String("azure")
+	// Google Cloud Platform
+	FaaSInvokedProviderGCP = FaaSInvokedProviderKey.String("gcp")
+)
+
+// These attributes may be used for any network related operation.
+const (
+	// Transport protocol used. See note below.
+	//
+	// Type: Enum
+	// Required: No
+	// Examples: 'ip_tcp'
+	NetTransportKey = attribute.Key("net.transport")
+	// Remote address of the peer (dotted decimal for IPv4 or
+	// [RFC5952](https://tools.ietf.org/html/rfc5952) for IPv6)
+	//
+	// Type: string
+	// Required: No
+	// Examples: '127.0.0.1'
+	NetPeerIPKey = attribute.Key("net.peer.ip")
+	// Remote port number.
+	//
+	// Type: int
+	// Required: No
+	// Examples: 80, 8080, 443
+	NetPeerPortKey = attribute.Key("net.peer.port")
+	// Remote hostname or similar, see note below.
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'example.com'
+	NetPeerNameKey = attribute.Key("net.peer.name")
+	// Like `net.peer.ip` but for the host IP. Useful in case of a multi-IP host.
+	//
+	// Type: string
+	// Required: No
+	// Examples: '192.168.0.1'
+	NetHostIPKey = attribute.Key("net.host.ip")
+	// Like `net.peer.port` but for the host port.
+	//
+	// Type: int
+	// Required: No
+	// Examples: 35555
+	NetHostPortKey = attribute.Key("net.host.port")
+	// Local hostname or similar, see note below.
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'localhost'
+	NetHostNameKey = attribute.Key("net.host.name")
+)
+
+var (
+	// ip_tcp
+	NetTransportTCP = NetTransportKey.String("ip_tcp")
+	// ip_udp
+	NetTransportUDP = NetTransportKey.String("ip_udp")
+	// Another IP-based protocol
+	NetTransportIP = NetTransportKey.String("ip")
+	// Unix Domain socket. See below
+	NetTransportUnix = NetTransportKey.String("unix")
+	// Named or anonymous pipe. See note below
+	NetTransportPipe = NetTransportKey.String("pipe")
+	// In-process communication
+	NetTransportInProc = NetTransportKey.String("inproc")
+	// Something else (non IP-based)
+	NetTransportOther = NetTransportKey.String("other")
+)
+
+// Operations that access some remote service.
+const (
+	// The [`service.name`](../../resource/semantic_conventions/README.md#service) of
+	// the remote service. SHOULD be equal to the actual `service.name` resource
+	// attribute of the remote service if any.
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'AuthTokenCache'
+	PeerServiceKey = attribute.Key("peer.service")
+)
+
+// These attributes may be used for any operation with an authenticated and/or authorized enduser.
+const (
+	// Username or client_id extracted from the access token or
+	// [Authorization](https://tools.ietf.org/html/rfc7235#section-4.2) header in the
+	// inbound request from outside the system.
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'username'
+	EnduserIDKey = attribute.Key("enduser.id")
+	// Actual/assumed role the client is making the request under extracted from token
+	// or application security context.
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'admin'
+	EnduserRoleKey = attribute.Key("enduser.role")
+	// Scopes or granted authorities the client currently possesses extracted from
+	// token or application security context. The value would come from the scope
+	// associated with an [OAuth 2.0 Access
+	// Token](https://tools.ietf.org/html/rfc6749#section-3.3) or an attribute value
+	// in a [SAML 2.0 Assertion](http://docs.oasis-
+	// open.org/security/saml/Post2.0/sstc-saml-tech-overview-2.0.html).
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'read:message, write:files'
+	EnduserScopeKey = attribute.Key("enduser.scope")
+)
+
+// These attributes may be used for any operation to store information about a thread that started a span.
+const (
+	// Current "managed" thread ID (as opposed to OS thread ID).
+	//
+	// Type: int
+	// Required: No
+	// Examples: 42
+	ThreadIDKey = attribute.Key("thread.id")
+	// Current thread name.
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'main'
+	ThreadNameKey = attribute.Key("thread.name")
+)
+
+// These attributes allow to report this unit of code and therefore to provide more context about the span.
+const (
+	// The method or function name, or equivalent (usually rightmost part of the code
+	// unit's name).
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'serveRequest'
+	CodeFunctionKey = attribute.Key("code.function")
+	// The "namespace" within which `code.function` is defined. Usually the qualified
+	// class or module name, such that `code.namespace` + some separator +
+	// `code.function` form a unique identifier for the code unit.
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'com.example.MyHTTPService'
+	CodeNamespaceKey = attribute.Key("code.namespace")
+	// The source code file name that identifies the code unit as uniquely as possible
+	// (preferably an absolute file path).
+	//
+	// Type: string
+	// Required: No
+	// Examples: '/usr/local/MyApplication/content_root/app/index.php'
+	CodeFilepathKey = attribute.Key("code.filepath")
+	// The line number in `code.filepath` best representing the operation. It SHOULD
+	// point within the code unit named in `code.function`.
+	//
+	// Type: int
+	// Required: No
+	// Examples: 42
+	CodeLineNumberKey = attribute.Key("code.lineno")
+)
+
+// This document defines semantic conventions for HTTP client and server Spans.
+const (
+	// HTTP request method.
+	//
+	// Type: string
+	// Required: Always
+	// Examples: 'GET', 'POST', 'HEAD'
+	HTTPMethodKey = attribute.Key("http.method")
+	// Full HTTP request URL in the form `scheme://host[:port]/path?query[#fragment]`.
+	// Usually the fragment is not transmitted over HTTP, but if it is known, it
+	// should be included nevertheless.
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'https://www.foo.bar/search?q=OpenTelemetry#SemConv'
+	// Note: `http.url` MUST NOT contain credentials passed via URL in form of
+	// `https://username:password@www.example.com/`. In such case the attribute's
+	// value should be `https://www.example.com/`.
+	HTTPURLKey = attribute.Key("http.url")
+	// The full request target as passed in a HTTP request line or equivalent.
+	//
+	// Type: string
+	// Required: No
+	// Examples: '/path/12314/?q=ddds#123'
+	HTTPTargetKey = attribute.Key("http.target")
+	// The value of the [HTTP host
+	// header](https://tools.ietf.org/html/rfc7230#section-5.4). When the header is
+	// empty or not present, this attribute should be the same.
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'www.example.org'
+	HTTPHostKey = attribute.Key("http.host")
+	// The URI scheme identifying the used protocol.
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'http', 'https'
+	HTTPSchemeKey = attribute.Key("http.scheme")
+	// [HTTP response status code](https://tools.ietf.org/html/rfc7231#section-6).
+	//
+	// Type: int
+	// Required: If and only if one was received/sent.
+	// Examples: 200
+	HTTPStatusCodeKey = attribute.Key("http.status_code")
+	// Kind of HTTP protocol used.
+	//
+	// Type: Enum
+	// Required: No
+	// Examples: '1.0'
+	// Note: If `net.transport` is not specified, it can be assumed to be `IP.TCP`
+	// except if `http.flavor` is `QUIC`, in which case `IP.UDP` is assumed.
+	HTTPFlavorKey = attribute.Key("http.flavor")
+	// Value of the [HTTP User-
+	// Agent](https://tools.ietf.org/html/rfc7231#section-5.5.3) header sent by the
+	// client.
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'CERN-LineMode/2.15 libwww/2.17b3'
+	HTTPUserAgentKey = attribute.Key("http.user_agent")
+	// The size of the request payload body in bytes. This is the number of bytes
+	// transferred excluding headers and is often, but not always, present as the
+	// [Content-Length](https://tools.ietf.org/html/rfc7230#section-3.3.2) header. For
+	// requests using transport encoding, this should be the compressed size.
+	//
+	// Type: int
+	// Required: No
+	// Examples: 3495
+	HTTPRequestContentLengthKey = attribute.Key("http.request_content_length")
+	// The size of the uncompressed request payload body after transport decoding. Not
+	// set if transport encoding not used.
+	//
+	// Type: int
+	// Required: No
+	// Examples: 5493
+	HTTPRequestContentLengthUncompressedKey = attribute.Key("http.request_content_length_uncompressed")
+	// The size of the response payload body in bytes. This is the number of bytes
+	// transferred excluding headers and is often, but not always, present as the
+	// [Content-Length](https://tools.ietf.org/html/rfc7230#section-3.3.2) header. For
+	// requests using transport encoding, this should be the compressed size.
+	//
+	// Type: int
+	// Required: No
+	// Examples: 3495
+	HTTPResponseContentLengthKey = attribute.Key("http.response_content_length")
+	// The size of the uncompressed response payload body after transport decoding.
+	// Not set if transport encoding not used.
+	//
+	// Type: int
+	// Required: No
+	// Examples: 5493
+	HTTPResponseContentLengthUncompressedKey = attribute.Key("http.response_content_length_uncompressed")
+)
+
+var (
+	// HTTP 1.0
+	HTTPFlavorHTTP10 = HTTPFlavorKey.String("1.0")
+	// HTTP 1.1
+	HTTPFlavorHTTP11 = HTTPFlavorKey.String("1.1")
+	// HTTP 2
+	HTTPFlavorHTTP20 = HTTPFlavorKey.String("2.0")
+	// SPDY protocol
+	HTTPFlavorSPDY = HTTPFlavorKey.String("SPDY")
+	// QUIC protocol
+	HTTPFlavorQUIC = HTTPFlavorKey.String("QUIC")
+)
+
+// Semantic Convention for HTTP Server
+const (
+	// The primary server name of the matched virtual host. This should be obtained
+	// via configuration. If no such configuration can be obtained, this attribute
+	// MUST NOT be set ( `net.host.name` should be used instead).
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'example.com'
+	// Note: `http.url` is usually not readily available on the server side but would
+	// have to be assembled in a cumbersome and sometimes lossy process from other
+	// information (see e.g. open-telemetry/opentelemetry-python/pull/148). It is thus
+	// preferred to supply the raw data that is available.
+	HTTPServerNameKey = attribute.Key("http.server_name")
+	// The matched route (path template).
+	//
+	// Type: string
+	// Required: No
+	// Examples: '/users/:userID?'
+	HTTPRouteKey = attribute.Key("http.route")
+	// The IP address of the original client behind all proxies, if known (e.g. from
+	// [X-Forwarded-For](https://developer.mozilla.org/en-
+	// US/docs/Web/HTTP/Headers/X-Forwarded-For)).
+	//
+	// Type: string
+	// Required: No
+	// Examples: '83.164.160.102'
+	// Note: This is not necessarily the same as `net.peer.ip`, which would identify
+	// the network-level peer, which may be a proxy.
+	HTTPClientIPKey = attribute.Key("http.client_ip")
+)
+
+// Attributes that exist for multiple DynamoDB request types.
+const (
+	// The keys in the `RequestItems` object field.
+	//
+	// Type: string[]
+	// Required: No
+	// Examples: 'Users', 'Cats'
+	AWSDynamoDBTableNamesKey = attribute.Key("aws.dynamodb.table_names")
+	// The JSON-serialized value of each item in the `ConsumedCapacity` response
+	// field.
+	//
+	// Type: string[]
+	// Required: No
+	// Examples: '{ "CapacityUnits": number, "GlobalSecondaryIndexes": { "string" : {
+	// "CapacityUnits": number, "ReadCapacityUnits": number, "WriteCapacityUnits":
+	// number } }, "LocalSecondaryIndexes": { "string" : { "CapacityUnits": number,
+	// "ReadCapacityUnits": number, "WriteCapacityUnits": number } },
+	// "ReadCapacityUnits": number, "Table": { "CapacityUnits": number,
+	// "ReadCapacityUnits": number, "WriteCapacityUnits": number }, "TableName":
+	// "string", "WriteCapacityUnits": number }'
+	AWSDynamoDBConsumedCapacityKey = attribute.Key("aws.dynamodb.consumed_capacity")
+	// The JSON-serialized value of the `ItemCollectionMetrics` response field.
+	//
+	// Type: string
+	// Required: No
+	// Examples: '{ "string" : [ { "ItemCollectionKey": { "string" : { "B": blob,
+	// "BOOL": boolean, "BS": [ blob ], "L": [ "AttributeValue" ], "M": { "string" :
+	// "AttributeValue" }, "N": "string", "NS": [ "string" ], "NULL": boolean, "S":
+	// "string", "SS": [ "string" ] } }, "SizeEstimateRangeGB": [ number ] } ] }'
+	AWSDynamoDBItemCollectionMetricsKey = attribute.Key("aws.dynamodb.item_collection_metrics")
+	// The value of the `ProvisionedThroughput.ReadCapacityUnits` request parameter.
+	//
+	// Type: double
+	// Required: No
+	// Examples: 1.0, 2.0
+	AWSDynamoDBProvisionedReadCapacityKey = attribute.Key("aws.dynamodb.provisioned_read_capacity")
+	// The value of the `ProvisionedThroughput.WriteCapacityUnits` request parameter.
+	//
+	// Type: double
+	// Required: No
+	// Examples: 1.0, 2.0
+	AWSDynamoDBProvisionedWriteCapacityKey = attribute.Key("aws.dynamodb.provisioned_write_capacity")
+	// The value of the `ConsistentRead` request parameter.
+	//
+	// Type: boolean
+	// Required: No
+	AWSDynamoDBConsistentReadKey = attribute.Key("aws.dynamodb.consistent_read")
+	// The value of the `ProjectionExpression` request parameter.
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'Title', 'Title, Price, Color', 'Title, Description, RelatedItems,
+	// ProductReviews'
+	AWSDynamoDBProjectionKey = attribute.Key("aws.dynamodb.projection")
+	// The value of the `Limit` request parameter.
+	//
+	// Type: int
+	// Required: No
+	// Examples: 10
+	AWSDynamoDBLimitKey = attribute.Key("aws.dynamodb.limit")
+	// The value of the `AttributesToGet` request parameter.
+	//
+	// Type: string[]
+	// Required: No
+	// Examples: 'lives', 'id'
+	AWSDynamoDBAttributesToGetKey = attribute.Key("aws.dynamodb.attributes_to_get")
+	// The value of the `IndexName` request parameter.
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'name_to_group'
+	AWSDynamoDBIndexNameKey = attribute.Key("aws.dynamodb.index_name")
+	// The value of the `Select` request parameter.
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'ALL_ATTRIBUTES', 'COUNT'
+	AWSDynamoDBSelectKey = attribute.Key("aws.dynamodb.select")
+)
+
+// DynamoDB.CreateTable
+const (
+	// The JSON-serialized value of each item of the `GlobalSecondaryIndexes` request
+	// field
+	//
+	// Type: string[]
+	// Required: No
+	// Examples: '{ "IndexName": "string", "KeySchema": [ { "AttributeName": "string",
+	// "KeyType": "string" } ], "Projection": { "NonKeyAttributes": [ "string" ],
+	// "ProjectionType": "string" }, "ProvisionedThroughput": { "ReadCapacityUnits":
+	// number, "WriteCapacityUnits": number } }'
+	AWSDynamoDBGlobalSecondaryIndexesKey = attribute.Key("aws.dynamodb.global_secondary_indexes")
+	// The JSON-serialized value of each item of the `LocalSecondaryIndexes` request
+	// field.
+	//
+	// Type: string[]
+	// Required: No
+	// Examples: '{ "IndexArn": "string", "IndexName": "string", "IndexSizeBytes":
+	// number, "ItemCount": number, "KeySchema": [ { "AttributeName": "string",
+	// "KeyType": "string" } ], "Projection": { "NonKeyAttributes": [ "string" ],
+	// "ProjectionType": "string" } }'
+	AWSDynamoDBLocalSecondaryIndexesKey = attribute.Key("aws.dynamodb.local_secondary_indexes")
+)
+
+// DynamoDB.ListTables
+const (
+	// The value of the `ExclusiveStartTableName` request parameter.
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'Users', 'CatsTable'
+	AWSDynamoDBExclusiveStartTableKey = attribute.Key("aws.dynamodb.exclusive_start_table")
+	// The the number of items in the `TableNames` response parameter.
+	//
+	// Type: int
+	// Required: No
+	// Examples: 20
+	AWSDynamoDBTableCountKey = attribute.Key("aws.dynamodb.table_count")
+)
+
+// DynamoDB.Query
+const (
+	// The value of the `ScanIndexForward` request parameter.
+	//
+	// Type: boolean
+	// Required: No
+	AWSDynamoDBScanForwardKey = attribute.Key("aws.dynamodb.scan_forward")
+)
+
+// DynamoDB.Scan
+const (
+	// The value of the `Segment` request parameter.
+	//
+	// Type: int
+	// Required: No
+	// Examples: 10
+	AWSDynamoDBSegmentKey = attribute.Key("aws.dynamodb.segment")
+	// The value of the `TotalSegments` request parameter.
+	//
+	// Type: int
+	// Required: No
+	// Examples: 100
+	AWSDynamoDBTotalSegmentsKey = attribute.Key("aws.dynamodb.total_segments")
+	// The value of the `Count` response parameter.
+	//
+	// Type: int
+	// Required: No
+	// Examples: 10
+	AWSDynamoDBCountKey = attribute.Key("aws.dynamodb.count")
+	// The value of the `ScannedCount` response parameter.
+	//
+	// Type: int
+	// Required: No
+	// Examples: 50
+	AWSDynamoDBScannedCountKey = attribute.Key("aws.dynamodb.scanned_count")
+)
+
+// DynamoDB.UpdateTable
+const (
+	// The JSON-serialized value of each item in the `AttributeDefinitions` request
+	// field.
+	//
+	// Type: string[]
+	// Required: No
+	// Examples: '{ "AttributeName": "string", "AttributeType": "string" }'
+	AWSDynamoDBAttributeDefinitionsKey = attribute.Key("aws.dynamodb.attribute_definitions")
+	// The JSON-serialized value of each item in the the `GlobalSecondaryIndexUpdates`
+	// request field.
+	//
+	// Type: string[]
+	// Required: No
+	// Examples: '{ "Create": { "IndexName": "string", "KeySchema": [ {
+	// "AttributeName": "string", "KeyType": "string" } ], "Projection": {
+	// "NonKeyAttributes": [ "string" ], "ProjectionType": "string" },
+	// "ProvisionedThroughput": { "ReadCapacityUnits": number, "WriteCapacityUnits":
+	// number } }'
+	AWSDynamoDBGlobalSecondaryIndexUpdatesKey = attribute.Key("aws.dynamodb.global_secondary_index_updates")
+)
+
+// This document defines the attributes used in messaging systems.
+const (
+	// A string identifying the messaging system.
+	//
+	// Type: string
+	// Required: Always
+	// Examples: 'kafka', 'rabbitmq', 'activemq', 'AmazonSQS'
+	MessagingSystemKey = attribute.Key("messaging.system")
+	// The message destination name. This might be equal to the span name but is
+	// required nevertheless.
+	//
+	// Type: string
+	// Required: Always
+	// Examples: 'MyQueue', 'MyTopic'
+	MessagingDestinationKey = attribute.Key("messaging.destination")
+	// The kind of message destination
+	//
+	// Type: Enum
+	// Required: Required only if the message destination is either a `queue` or
+	// `topic`.
+	MessagingDestinationKindKey = attribute.Key("messaging.destination_kind")
+	// A boolean that is true if the message destination is temporary.
+	//
+	// Type: boolean
+	// Required: If missing, it is assumed to be false.
+	MessagingTempDestinationKey = attribute.Key("messaging.temp_destination")
+	// The name of the transport protocol.
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'AMQP', 'MQTT'
+	MessagingProtocolKey = attribute.Key("messaging.protocol")
+	// The version of the transport protocol.
+	//
+	// Type: string
+	// Required: No
+	// Examples: '0.9.1'
+	MessagingProtocolVersionKey = attribute.Key("messaging.protocol_version")
+	// Connection string.
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'tibjmsnaming://localhost:7222',
+	// 'https://queue.amazonaws.com/80398EXAMPLE/MyQueue'
+	MessagingURLKey = attribute.Key("messaging.url")
+	// A value used by the messaging system as an identifier for the message,
+	// represented as a string.
+	//
+	// Type: string
+	// Required: No
+	// Examples: '452a7c7c7c7048c2f887f61572b18fc2'
+	MessagingMessageIDKey = attribute.Key("messaging.message_id")
+	// The [conversation ID](#conversations) identifying the conversation to which the
+	// message belongs, represented as a string. Sometimes called "Correlation ID".
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'MyConversationId'
+	MessagingConversationIDKey = attribute.Key("messaging.conversation_id")
+	// The (uncompressed) size of the message payload in bytes. Also use this
+	// attribute if it is unknown whether the compressed or uncompressed payload size
+	// is reported.
+	//
+	// Type: int
+	// Required: No
+	// Examples: 2738
+	MessagingMessagePayloadSizeBytesKey = attribute.Key("messaging.message_payload_size_bytes")
+	// The compressed size of the message payload in bytes.
+	//
+	// Type: int
+	// Required: No
+	// Examples: 2048
+	MessagingMessagePayloadCompressedSizeBytesKey = attribute.Key("messaging.message_payload_compressed_size_bytes")
+)
+
+var (
+	// A message sent to a queue
+	MessagingDestinationKindQueue = MessagingDestinationKindKey.String("queue")
+	// A message sent to a topic
+	MessagingDestinationKindTopic = MessagingDestinationKindKey.String("topic")
+)
+
+// Semantic convention for a consumer of messages received from a messaging system
+const (
+	// A string identifying the kind of message consumption as defined in the
+	// [Operation names](#operation-names) section above. If the operation is "send",
+	// this attribute MUST NOT be set, since the operation can be inferred from the
+	// span kind in that case.
+	//
+	// Type: Enum
+	// Required: No
+	MessagingOperationKey = attribute.Key("messaging.operation")
+)
+
+var (
+	// receive
+	MessagingOperationReceive = MessagingOperationKey.String("receive")
+	// process
+	MessagingOperationProcess = MessagingOperationKey.String("process")
+)
+
+// Attributes for RabbitMQ
+const (
+	// RabbitMQ message routing key.
+	//
+	// Type: string
+	// Required: Unless it is empty.
+	// Examples: 'myKey'
+	MessagingRabbitmqRoutingKeyKey = attribute.Key("messaging.rabbitmq.routing_key")
+)
+
+// Attributes for Apache Kafka
+const (
+	// Message keys in Kafka are used for grouping alike messages to ensure they're
+	// processed on the same partition. They differ from `messaging.message_id` in
+	// that they're not unique. If the key is `null`, the attribute MUST NOT be set.
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'myKey'
+	// Note: If the key type is not string, it's string representation has to be
+	// supplied for the attribute. If the key has no unambiguous, canonical string
+	// form, don't include its value.
+	MessagingKafkaMessageKeyKey = attribute.Key("messaging.kafka.message_key")
+	// Name of the Kafka Consumer Group that is handling the message. Only applies to
+	// consumers, not producers.
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'my-group'
+	MessagingKafkaConsumerGroupKey = attribute.Key("messaging.kafka.consumer_group")
+	// Client ID for the Consumer or Producer that is handling the message.
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'client-5'
+	MessagingKafkaClientIDKey = attribute.Key("messaging.kafka.client_id")
+	// Partition the message is sent to.
+	//
+	// Type: int
+	// Required: No
+	// Examples: 2
+	MessagingKafkaPartitionKey = attribute.Key("messaging.kafka.partition")
+	// A boolean that is true if the message is a tombstone.
+	//
+	// Type: boolean
+	// Required: If missing, it is assumed to be false.
+	MessagingKafkaTombstoneKey = attribute.Key("messaging.kafka.tombstone")
+)
+
+// This document defines semantic conventions for remote procedure calls.
+const (
+	// A string identifying the remoting system.
+	//
+	// Type: string
+	// Required: Always
+	// Examples: 'grpc', 'java_rmi', 'wcf'
+	RPCSystemKey = attribute.Key("rpc.system")
+	// The full name of the service being called, including its package name, if
+	// applicable.
+	//
+	// Type: string
+	// Required: No, but recommended
+	// Examples: 'myservice.EchoService'
+	RPCServiceKey = attribute.Key("rpc.service")
+	// The name of the method being called, must be equal to the $method part in the
+	// span name.
+	//
+	// Type: string
+	// Required: No, but recommended
+	// Examples: 'exampleMethod'
+	RPCMethodKey = attribute.Key("rpc.method")
+)
+
+// Tech-specific attributes for gRPC.
+const (
+	// The [numeric status
+	// code](https://github.com/grpc/grpc/blob/v1.33.2/doc/statuscodes.md) of the gRPC
+	// request.
+	//
+	// Type: Enum
+	// Required: Always
+	// Examples: 0, 1, 16
+	RPCGRPCStatusCodeKey = attribute.Key("rpc.grpc.status_code")
+)
+
+var (
+	// OK
+	RPCGRPCStatusCodeOk = RPCGRPCStatusCodeKey.Int(0)
+	// CANCELLED
+	RPCGRPCStatusCodeCancelled = RPCGRPCStatusCodeKey.Int(1)
+	// UNKNOWN
+	RPCGRPCStatusCodeUnknown = RPCGRPCStatusCodeKey.Int(2)
+	// INVALID_ARGUMENT
+	RPCGRPCStatusCodeInvalidArgument = RPCGRPCStatusCodeKey.Int(3)
+	// DEADLINE_EXCEEDED
+	RPCGRPCStatusCodeDeadlineExceeded = RPCGRPCStatusCodeKey.Int(4)
+	// NOT_FOUND
+	RPCGRPCStatusCodeNotFound = RPCGRPCStatusCodeKey.Int(5)
+	// ALREADY_EXISTS
+	RPCGRPCStatusCodeAlreadyExists = RPCGRPCStatusCodeKey.Int(6)
+	// PERMISSION_DENIED
+	RPCGRPCStatusCodePermissionDenied = RPCGRPCStatusCodeKey.Int(7)
+	// RESOURCE_EXHAUSTED
+	RPCGRPCStatusCodeResourceExhausted = RPCGRPCStatusCodeKey.Int(8)
+	// FAILED_PRECONDITION
+	RPCGRPCStatusCodeFailedPrecondition = RPCGRPCStatusCodeKey.Int(9)
+	// ABORTED
+	RPCGRPCStatusCodeAborted = RPCGRPCStatusCodeKey.Int(10)
+	// OUT_OF_RANGE
+	RPCGRPCStatusCodeOutOfRange = RPCGRPCStatusCodeKey.Int(11)
+	// UNIMPLEMENTED
+	RPCGRPCStatusCodeUnimplemented = RPCGRPCStatusCodeKey.Int(12)
+	// INTERNAL
+	RPCGRPCStatusCodeInternal = RPCGRPCStatusCodeKey.Int(13)
+	// UNAVAILABLE
+	RPCGRPCStatusCodeUnavailable = RPCGRPCStatusCodeKey.Int(14)
+	// DATA_LOSS
+	RPCGRPCStatusCodeDataLoss = RPCGRPCStatusCodeKey.Int(15)
+	// UNAUTHENTICATED
+	RPCGRPCStatusCodeUnauthenticated = RPCGRPCStatusCodeKey.Int(16)
+)
+
+// Tech-specific attributes for [JSON RPC](https://www.jsonrpc.org/).
+const (
+	// Protocol version as in `jsonrpc` property of request/response. Since JSON-RPC
+	// 1.0 does not specify this, the value can be omitted.
+	//
+	// Type: string
+	// Required: If missing, it is assumed to be "1.0".
+	// Examples: '2.0', '1.0'
+	RPCJsonrpcVersionKey = attribute.Key("rpc.jsonrpc.version")
+	// `method` property from request. Unlike `rpc.method`, this may not relate to the
+	// actual method being called. Useful for client-side traces since client does not
+	// know what will be called on the server.
+	//
+	// Type: string
+	// Required: Always
+	// Examples: 'users.create', 'get_users'
+	RPCJsonrpcMethodKey = attribute.Key("rpc.jsonrpc.method")
+	// `id` property of request or response. Since protocol allows id to be int,
+	// string, `null` or missing (for notifications), value is expected to be cast to
+	// string for simplicity. Use empty string in case of `null` value. Omit entirely
+	// if this is a notification.
+	//
+	// Type: string
+	// Required: No
+	// Examples: '10', 'request-7', ''
+	RPCJsonrpcRequestIDKey = attribute.Key("rpc.jsonrpc.request_id")
+	// `error.code` property of response if it is an error response.
+	//
+	// Type: int
+	// Required: If missing, response is assumed to be successful.
+	// Examples: -32700, 100
+	RPCJsonrpcErrorCodeKey = attribute.Key("rpc.jsonrpc.error_code")
+	// `error.message` property of response if it is an error response.
+	//
+	// Type: string
+	// Required: No
+	// Examples: 'Parse error', 'User already exists'
+	RPCJsonrpcErrorMessageKey = attribute.Key("rpc.jsonrpc.error_message")
+)
diff --git a/vendor/go.opentelemetry.io/otel/tag.sh b/vendor/go.opentelemetry.io/otel/tag.sh
new file mode 100644
index 000000000..70767c703
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/tag.sh
@@ -0,0 +1,178 @@
+#!/usr/bin/env bash
+
+# Copyright The OpenTelemetry Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+readonly PROGNAME=$(basename "$0")
+readonly PROGDIR=$(readlink -m "$(dirname "$0")")
+
+readonly EXCLUDE_PACKAGES="internal/tools"
+readonly SEMVER_REGEX="v(0|[1-9][0-9]*)\\.(0|[1-9][0-9]*)\\.(0|[1-9][0-9]*)(\\-[0-9A-Za-z-]+(\\.[0-9A-Za-z-]+)*)?(\\+[0-9A-Za-z-]+(\\.[0-9A-Za-z-]+)*)?"
+
+usage() {
+    cat <<- EOF
+Usage: $PROGNAME [OPTIONS] SEMVER_TAG COMMIT_HASH
+
+Creates git tag for all Go packages in project.
+
+OPTIONS:
+  -h --help        Show this help.
+
+ARGUMENTS:
+  SEMVER_TAG       Semantic version to tag with.
+  COMMIT_HASH      Git commit hash to tag.
+EOF
+}
+
+cmdline() {
+    local arg commit
+
+    for arg
+    do
+        local delim=""
+        case "$arg" in
+            # Translate long form options to short form.
+            --help)           args="${args}-h ";;
+            # Pass through for everything else.
+            *) [[ "${arg:0:1}" == "-" ]] || delim="\""
+                args="${args}${delim}${arg}${delim} ";;
+        esac
+    done
+
+    # Reset and process short form options.
+    eval set -- "$args"
+
+    while getopts "h" OPTION
+    do
+         case $OPTION in
+         h)
+             usage
+             exit 0
+             ;;
+         *)
+             echo "unknown option: $OPTION"
+             usage
+             exit 1
+             ;;
+        esac
+    done
+
+    # Positional arguments.
+    shift $((OPTIND-1))
+    readonly TAG="$1"
+    if [ -z "$TAG" ]
+    then
+        echo "missing SEMVER_TAG"
+        usage
+        exit 1
+    fi
+    if [[ ! "$TAG" =~ $SEMVER_REGEX ]]
+    then
+        printf "invalid semantic version: %s\n" "$TAG"
+        exit 2
+    fi
+    if [[ "$( git tag --list "$TAG" )" ]]
+    then
+        printf "tag already exists: %s\n" "$TAG"
+        exit 2
+    fi
+
+    shift
+    commit="$1"
+    if [ -z "$commit" ]
+    then
+        echo "missing COMMIT_HASH"
+        usage
+        exit 1
+    fi
+    # Verify rev is for a commit and unify hashes into a complete SHA1.
+    readonly SHA="$( git rev-parse --quiet --verify "${commit}^{commit}" )"
+    if [ -z "$SHA" ]
+    then
+        printf "invalid commit hash: %s\n" "$commit"
+        exit 2
+    fi
+    if [ "$( git merge-base "$SHA" HEAD )" != "$SHA" ]
+    then
+        printf "commit '%s' not found on this branch\n" "$commit"
+        exit 2
+    fi
+}
+
+package_dirs() {
+    # Return a list of package directories in the form:
+    #
+    #  package/directory/a
+    #  package/directory/b
+    #  deeper/package/directory/a
+    #  ...
+    #
+    # Making sure to exclude any packages in the EXCLUDE_PACKAGES regexp.
+    find . -mindepth 2 -type f -name 'go.mod' -exec dirname {} \; \
+        | grep -E -v "$EXCLUDE_PACKAGES" \
+        | sed 's/^\.\///' \
+        | sort
+}
+
+git_tag() {
+    local tag="$1"
+    local commit="$2"
+
+    git tag -a "$tag" -s -m "Version $tag" "$commit"
+}
+
+previous_version() {
+    local current="$1"
+
+    # Requires git > 2.0
+    git tag -l --sort=v:refname \
+        | grep -E "^${SEMVER_REGEX}$" \
+        | grep -v "$current" \
+        | tail -1
+}
+
+print_changes() {
+    local tag="$1"
+    local previous
+
+    previous="$( previous_version "$tag" )"
+    if [ -n "$previous" ]
+    then
+        printf "\nRaw changes made between %s and %s\n" "$previous" "$tag"
+        printf "======================================\n"
+        git --no-pager log --pretty=oneline "${previous}..$tag"
+    fi
+}
+
+main() {
+    local dir
+
+    cmdline "$@"
+
+    cd "$PROGDIR" || exit 3
+
+    # Create tag for root package.
+    git_tag "$TAG" "$SHA"
+    printf "created tag: %s\n" "$TAG"
+
+    # Create tag for all sub-packages.
+    for dir in $( package_dirs )
+    do
+        git_tag "${dir}/$TAG" "$SHA"
+        printf "created tag: %s\n" "${dir}/$TAG"
+    done
+
+    print_changes "$TAG"
+}
+main "$@"
diff --git a/vendor/go.opentelemetry.io/otel/trace.go b/vendor/go.opentelemetry.io/otel/trace.go
new file mode 100644
index 000000000..b1e8e56bd
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/trace.go
@@ -0,0 +1,44 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package otel // import "go.opentelemetry.io/otel"
+
+import (
+	"go.opentelemetry.io/otel/internal/global"
+	"go.opentelemetry.io/otel/trace"
+)
+
+// Tracer creates a named tracer that implements Tracer interface.
+// If the name is an empty string then provider uses default name.
+//
+// This is short for GetTracerProvider().Tracer(name, opts...)
+func Tracer(name string, opts ...trace.TracerOption) trace.Tracer {
+	return GetTracerProvider().Tracer(name, opts...)
+}
+
+// GetTracerProvider returns the registered global trace provider.
+// If none is registered then an instance of NoopTracerProvider is returned.
+//
+// Use the trace provider to create a named tracer. E.g.
+//     tracer := global.GetTracerProvider().Tracer("example.com/foo")
+// or
+//     tracer := global.Tracer("example.com/foo")
+func GetTracerProvider() trace.TracerProvider {
+	return global.TracerProvider()
+}
+
+// SetTracerProvider registers `tp` as the global trace provider.
+func SetTracerProvider(tp trace.TracerProvider) {
+	global.SetTracerProvider(tp)
+}
diff --git a/vendor/go.opentelemetry.io/otel/trace/LICENSE b/vendor/go.opentelemetry.io/otel/trace/LICENSE
new file mode 100644
index 000000000..261eeb9e9
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/trace/LICENSE
@@ -0,0 +1,201 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
diff --git a/vendor/go.opentelemetry.io/otel/trace/config.go b/vendor/go.opentelemetry.io/otel/trace/config.go
new file mode 100644
index 000000000..0ecb4dcb8
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/trace/config.go
@@ -0,0 +1,268 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package trace // import "go.opentelemetry.io/otel/trace"
+
+import (
+	"time"
+
+	"go.opentelemetry.io/otel/attribute"
+)
+
+// TracerConfig is a group of options for a Tracer.
+type TracerConfig struct {
+	instrumentationVersion string
+	// Schema URL of the telemetry emitted by the Tracer.
+	schemaURL string
+}
+
+// InstrumentationVersion returns the version of the library providing instrumentation.
+func (t *TracerConfig) InstrumentationVersion() string {
+	return t.instrumentationVersion
+}
+
+// SchemaURL returns the Schema URL of the telemetry emitted by the Tracer.
+func (t *TracerConfig) SchemaURL() string {
+	return t.schemaURL
+}
+
+// NewTracerConfig applies all the options to a returned TracerConfig.
+func NewTracerConfig(options ...TracerOption) *TracerConfig {
+	config := new(TracerConfig)
+	for _, option := range options {
+		option.apply(config)
+	}
+	return config
+}
+
+// TracerOption applies an option to a TracerConfig.
+type TracerOption interface {
+	apply(*TracerConfig)
+}
+
+type tracerOptionFunc func(*TracerConfig)
+
+func (fn tracerOptionFunc) apply(cfg *TracerConfig) {
+	fn(cfg)
+}
+
+// SpanConfig is a group of options for a Span.
+type SpanConfig struct {
+	attributes []attribute.KeyValue
+	timestamp  time.Time
+	links      []Link
+	newRoot    bool
+	spanKind   SpanKind
+}
+
+// Attributes describe the associated qualities of a Span.
+func (cfg *SpanConfig) Attributes() []attribute.KeyValue {
+	return cfg.attributes
+}
+
+// Timestamp is a time in a Span life-cycle.
+func (cfg *SpanConfig) Timestamp() time.Time {
+	return cfg.timestamp
+}
+
+// Links are the associations a Span has with other Spans.
+func (cfg *SpanConfig) Links() []Link {
+	return cfg.links
+}
+
+// NewRoot identifies a Span as the root Span for a new trace. This is
+// commonly used when an existing trace crosses trust boundaries and the
+// remote parent span context should be ignored for security.
+func (cfg *SpanConfig) NewRoot() bool {
+	return cfg.newRoot
+}
+
+// SpanKind is the role a Span has in a trace.
+func (cfg *SpanConfig) SpanKind() SpanKind {
+	return cfg.spanKind
+}
+
+// NewSpanStartConfig applies all the options to a returned SpanConfig.
+// No validation is performed on the returned SpanConfig (e.g. no uniqueness
+// checking or bounding of data), it is left to the SDK to perform this
+// action.
+func NewSpanStartConfig(options ...SpanStartOption) *SpanConfig {
+	c := new(SpanConfig)
+	for _, option := range options {
+		option.applySpanStart(c)
+	}
+	return c
+}
+
+// NewSpanEndConfig applies all the options to a returned SpanConfig.
+// No validation is performed on the returned SpanConfig (e.g. no uniqueness
+// checking or bounding of data), it is left to the SDK to perform this
+// action.
+func NewSpanEndConfig(options ...SpanEndOption) *SpanConfig {
+	c := new(SpanConfig)
+	for _, option := range options {
+		option.applySpanEnd(c)
+	}
+	return c
+}
+
+// SpanStartOption applies an option to a SpanConfig. These options are applicable
+// only when the span is created
+type SpanStartOption interface {
+	applySpanStart(*SpanConfig)
+}
+
+type spanOptionFunc func(*SpanConfig)
+
+func (fn spanOptionFunc) applySpanStart(cfg *SpanConfig) {
+	fn(cfg)
+}
+
+// SpanEndOption applies an option to a SpanConfig. These options are
+// applicable only when the span is ended.
+type SpanEndOption interface {
+	applySpanEnd(*SpanConfig)
+}
+
+// EventConfig is a group of options for an Event.
+type EventConfig struct {
+	attributes []attribute.KeyValue
+	timestamp  time.Time
+}
+
+// Attributes describe the associated qualities of an Event.
+func (cfg *EventConfig) Attributes() []attribute.KeyValue {
+	return cfg.attributes
+}
+
+// Timestamp is a time in an Event life-cycle.
+func (cfg *EventConfig) Timestamp() time.Time {
+	return cfg.timestamp
+}
+
+// NewEventConfig applies all the EventOptions to a returned SpanConfig. If no
+// timestamp option is passed, the returned SpanConfig will have a Timestamp
+// set to the call time, otherwise no validation is performed on the returned
+// SpanConfig.
+func NewEventConfig(options ...EventOption) *EventConfig {
+	c := new(EventConfig)
+	for _, option := range options {
+		option.applyEvent(c)
+	}
+	if c.timestamp.IsZero() {
+		c.timestamp = time.Now()
+	}
+	return c
+}
+
+// EventOption applies span event options to an EventConfig.
+type EventOption interface {
+	applyEvent(*EventConfig)
+}
+
+// SpanOption are options that can be used at both the beginning and end of a span.
+type SpanOption interface {
+	SpanStartOption
+	SpanEndOption
+}
+
+// SpanStartEventOption are options that can be used at the start of a span, or with an event.
+type SpanStartEventOption interface {
+	SpanStartOption
+	EventOption
+}
+
+type attributeOption []attribute.KeyValue
+
+func (o attributeOption) applySpan(c *SpanConfig) {
+	c.attributes = append(c.attributes, []attribute.KeyValue(o)...)
+}
+func (o attributeOption) applySpanStart(c *SpanConfig) { o.applySpan(c) }
+func (o attributeOption) applyEvent(c *EventConfig) {
+	c.attributes = append(c.attributes, []attribute.KeyValue(o)...)
+}
+
+var _ SpanStartEventOption = attributeOption{}
+
+// WithAttributes adds the attributes related to a span life-cycle event.
+// These attributes are used to describe the work a Span represents when this
+// option is provided to a Span's start or end events. Otherwise, these
+// attributes provide additional information about the event being recorded
+// (e.g. error, state change, processing progress, system event).
+//
+// If multiple of these options are passed the attributes of each successive
+// option will extend the attributes instead of overwriting. There is no
+// guarantee of uniqueness in the resulting attributes.
+func WithAttributes(attributes ...attribute.KeyValue) SpanStartEventOption {
+	return attributeOption(attributes)
+}
+
+// SpanEventOption are options that can be used with an event or a span.
+type SpanEventOption interface {
+	SpanOption
+	EventOption
+}
+
+type timestampOption time.Time
+
+func (o timestampOption) applySpan(c *SpanConfig)      { c.timestamp = time.Time(o) }
+func (o timestampOption) applySpanStart(c *SpanConfig) { o.applySpan(c) }
+func (o timestampOption) applySpanEnd(c *SpanConfig)   { o.applySpan(c) }
+func (o timestampOption) applyEvent(c *EventConfig)    { c.timestamp = time.Time(o) }
+
+var _ SpanEventOption = timestampOption{}
+
+// WithTimestamp sets the time of a Span or Event life-cycle moment (e.g.
+// started, stopped, errored).
+func WithTimestamp(t time.Time) SpanEventOption {
+	return timestampOption(t)
+}
+
+// WithLinks adds links to a Span. The links are added to the existing Span
+// links, i.e. this does not overwrite.
+func WithLinks(links ...Link) SpanStartOption {
+	return spanOptionFunc(func(cfg *SpanConfig) {
+		cfg.links = append(cfg.links, links...)
+	})
+}
+
+// WithNewRoot specifies that the Span should be treated as a root Span. Any
+// existing parent span context will be ignored when defining the Span's trace
+// identifiers.
+func WithNewRoot() SpanStartOption {
+	return spanOptionFunc(func(cfg *SpanConfig) {
+		cfg.newRoot = true
+	})
+}
+
+// WithSpanKind sets the SpanKind of a Span.
+func WithSpanKind(kind SpanKind) SpanStartOption {
+	return spanOptionFunc(func(cfg *SpanConfig) {
+		cfg.spanKind = kind
+	})
+}
+
+// WithInstrumentationVersion sets the instrumentation version.
+func WithInstrumentationVersion(version string) TracerOption {
+	return tracerOptionFunc(func(cfg *TracerConfig) {
+		cfg.instrumentationVersion = version
+	})
+}
+
+// WithSchemaURL sets the schema URL for the Tracer.
+func WithSchemaURL(schemaURL string) TracerOption {
+	return tracerOptionFunc(func(cfg *TracerConfig) {
+		cfg.schemaURL = schemaURL
+	})
+}
diff --git a/vendor/go.opentelemetry.io/otel/trace/context.go b/vendor/go.opentelemetry.io/otel/trace/context.go
new file mode 100644
index 000000000..76f9a083c
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/trace/context.go
@@ -0,0 +1,61 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package trace // import "go.opentelemetry.io/otel/trace"
+
+import "context"
+
+type traceContextKeyType int
+
+const currentSpanKey traceContextKeyType = iota
+
+// ContextWithSpan returns a copy of parent with span set as the current Span.
+func ContextWithSpan(parent context.Context, span Span) context.Context {
+	return context.WithValue(parent, currentSpanKey, span)
+}
+
+// ContextWithSpanContext returns a copy of parent with sc as the current
+// Span. The Span implementation that wraps sc is non-recording and performs
+// no operations other than to return sc as the SpanContext from the
+// SpanContext method.
+func ContextWithSpanContext(parent context.Context, sc SpanContext) context.Context {
+	return ContextWithSpan(parent, nonRecordingSpan{sc: sc})
+}
+
+// ContextWithRemoteSpanContext returns a copy of parent with rsc set explicly
+// as a remote SpanContext and as the current Span. The Span implementation
+// that wraps rsc is non-recording and performs no operations other than to
+// return rsc as the SpanContext from the SpanContext method.
+func ContextWithRemoteSpanContext(parent context.Context, rsc SpanContext) context.Context {
+	return ContextWithSpanContext(parent, rsc.WithRemote(true))
+}
+
+// SpanFromContext returns the current Span from ctx.
+//
+// If no Span is currently set in ctx an implementation of a Span that
+// performs no operations is returned.
+func SpanFromContext(ctx context.Context) Span {
+	if ctx == nil {
+		return noopSpan{}
+	}
+	if span, ok := ctx.Value(currentSpanKey).(Span); ok {
+		return span
+	}
+	return noopSpan{}
+}
+
+// SpanContextFromContext returns the current Span's SpanContext.
+func SpanContextFromContext(ctx context.Context) SpanContext {
+	return SpanFromContext(ctx).SpanContext()
+}
diff --git a/vendor/go.opentelemetry.io/otel/trace/doc.go b/vendor/go.opentelemetry.io/otel/trace/doc.go
new file mode 100644
index 000000000..5cc505002
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/trace/doc.go
@@ -0,0 +1,69 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+/*
+Package trace provides an implementation of the tracing part of the
+OpenTelemetry API.
+
+This package is currently in a Release Candidate phase. Backwards incompatible changes
+may be introduced prior to v1.0.0, but we believe the current API is ready to stabilize.
+
+To participate in distributed traces a Span needs to be created for the
+operation being performed as part of a traced workflow. It its simplest form:
+
+	var tracer trace.Tracer
+
+	func init() {
+		tracer = otel.Tracer("instrumentation/package/name")
+	}
+
+	func operation(ctx context.Context) {
+		var span trace.Span
+		ctx, span = tracer.Start(ctx, "operation")
+		defer span.End()
+		// ...
+	}
+
+A Tracer is unique to the instrumentation and is used to create Spans.
+Instrumentation should be designed to accept a TracerProvider from which it
+can create its own unique Tracer. Alternatively, the registered global
+TracerProvider from the go.opentelemetry.io/otel package can be used as
+a default.
+
+	const (
+		name    = "instrumentation/package/name"
+		version = "0.1.0"
+	)
+
+	type Instrumentation struct {
+		tracer trace.Tracer
+	}
+
+	func NewInstrumentation(tp trace.TracerProvider) *Instrumentation {
+		if tp == nil {
+			tp = otel.TracerProvider()
+		}
+		return &Instrumentation{
+			tracer: tp.Tracer(name, trace.WithInstrumentationVersion(version)),
+		}
+	}
+
+	func operation(ctx context.Context, inst *Instrumentation) {
+		var span trace.Span
+		ctx, span = inst.tracer.Start(ctx, "operation")
+		defer span.End()
+		// ...
+	}
+*/
+package trace // import "go.opentelemetry.io/otel/trace"
diff --git a/vendor/go.opentelemetry.io/otel/trace/go.mod b/vendor/go.opentelemetry.io/otel/trace/go.mod
new file mode 100644
index 000000000..49bea6d3b
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/trace/go.mod
@@ -0,0 +1,73 @@
+module go.opentelemetry.io/otel/trace
+
+go 1.15
+
+replace go.opentelemetry.io/otel => ../
+
+replace go.opentelemetry.io/otel/bridge/opencensus => ../bridge/opencensus
+
+replace go.opentelemetry.io/otel/bridge/opentracing => ../bridge/opentracing
+
+replace go.opentelemetry.io/otel/example/jaeger => ../example/jaeger
+
+replace go.opentelemetry.io/otel/example/namedtracer => ../example/namedtracer
+
+replace go.opentelemetry.io/otel/example/opencensus => ../example/opencensus
+
+replace go.opentelemetry.io/otel/example/otel-collector => ../example/otel-collector
+
+replace go.opentelemetry.io/otel/example/prom-collector => ../example/prom-collector
+
+replace go.opentelemetry.io/otel/example/prometheus => ../example/prometheus
+
+replace go.opentelemetry.io/otel/example/zipkin => ../example/zipkin
+
+replace go.opentelemetry.io/otel/exporters/prometheus => ../exporters/prometheus
+
+replace go.opentelemetry.io/otel/exporters/jaeger => ../exporters/jaeger
+
+replace go.opentelemetry.io/otel/exporters/zipkin => ../exporters/zipkin
+
+replace go.opentelemetry.io/otel/internal/tools => ../internal/tools
+
+replace go.opentelemetry.io/otel/metric => ../metric
+
+replace go.opentelemetry.io/otel/oteltest => ../oteltest
+
+replace go.opentelemetry.io/otel/sdk => ../sdk
+
+replace go.opentelemetry.io/otel/sdk/export/metric => ../sdk/export/metric
+
+replace go.opentelemetry.io/otel/sdk/metric => ../sdk/metric
+
+replace go.opentelemetry.io/otel/trace => ./
+
+require (
+	github.com/google/go-cmp v0.5.6
+	github.com/stretchr/testify v1.7.0
+	go.opentelemetry.io/otel v1.0.0-RC1
+)
+
+replace go.opentelemetry.io/otel/example/passthrough => ../example/passthrough
+
+replace go.opentelemetry.io/otel/exporters/otlp/otlptrace => ../exporters/otlp/otlptrace
+
+replace go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc => ../exporters/otlp/otlptrace/otlptracegrpc
+
+replace go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp => ../exporters/otlp/otlptrace/otlptracehttp
+
+replace go.opentelemetry.io/otel/internal/metric => ../internal/metric
+
+replace go.opentelemetry.io/otel/exporters/metric/prometheus => ../exporters/metric/prometheus
+
+replace go.opentelemetry.io/otel/exporters/trace/jaeger => ../exporters/trace/jaeger
+
+replace go.opentelemetry.io/otel/exporters/trace/zipkin => ../exporters/trace/zipkin
+
+replace go.opentelemetry.io/otel/exporters/otlp/otlpmetric => ../exporters/otlp/otlpmetric
+
+replace go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc => ../exporters/otlp/otlpmetric/otlpmetricgrpc
+
+replace go.opentelemetry.io/otel/exporters/stdout/stdoutmetric => ../exporters/stdout/stdoutmetric
+
+replace go.opentelemetry.io/otel/exporters/stdout/stdouttrace => ../exporters/stdout/stdouttrace
diff --git a/vendor/go.opentelemetry.io/otel/trace/go.sum b/vendor/go.opentelemetry.io/otel/trace/go.sum
new file mode 100644
index 000000000..f212493d5
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/trace/go.sum
@@ -0,0 +1,15 @@
+github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/google/go-cmp v0.5.6 h1:BKbKCqvP6I+rmFHt06ZmyQtvB8xAkWdhFyr0ZUNZcxQ=
+github.com/google/go-cmp v0.5.6/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
+github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
+golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
diff --git a/vendor/go.opentelemetry.io/otel/trace/nonrecording.go b/vendor/go.opentelemetry.io/otel/trace/nonrecording.go
new file mode 100644
index 000000000..88fcb8161
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/trace/nonrecording.go
@@ -0,0 +1,27 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package trace // import "go.opentelemetry.io/otel/trace"
+
+// nonRecordingSpan is a minimal implementation of a Span that wraps a
+// SpanContext. It performs no operations other than to return the wrapped
+// SpanContext.
+type nonRecordingSpan struct {
+	noopSpan
+
+	sc SpanContext
+}
+
+// SpanContext returns the wrapped SpanContext.
+func (s nonRecordingSpan) SpanContext() SpanContext { return s.sc }
diff --git a/vendor/go.opentelemetry.io/otel/trace/noop.go b/vendor/go.opentelemetry.io/otel/trace/noop.go
new file mode 100644
index 000000000..ad9a9fc5b
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/trace/noop.go
@@ -0,0 +1,89 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package trace // import "go.opentelemetry.io/otel/trace"
+
+import (
+	"context"
+
+	"go.opentelemetry.io/otel/attribute"
+	"go.opentelemetry.io/otel/codes"
+)
+
+// NewNoopTracerProvider returns an implementation of TracerProvider that
+// performs no operations. The Tracer and Spans created from the returned
+// TracerProvider also perform no operations.
+func NewNoopTracerProvider() TracerProvider {
+	return noopTracerProvider{}
+}
+
+type noopTracerProvider struct{}
+
+var _ TracerProvider = noopTracerProvider{}
+
+// Tracer returns noop implementation of Tracer.
+func (p noopTracerProvider) Tracer(string, ...TracerOption) Tracer {
+	return noopTracer{}
+}
+
+// noopTracer is an implementation of Tracer that preforms no operations.
+type noopTracer struct{}
+
+var _ Tracer = noopTracer{}
+
+// Start carries forward a non-recording Span, if one is present in the context, otherwise it
+// creates a no-op Span.
+func (t noopTracer) Start(ctx context.Context, name string, _ ...SpanStartOption) (context.Context, Span) {
+	span := SpanFromContext(ctx)
+	if _, ok := span.(nonRecordingSpan); !ok {
+		// span is likely already a noopSpan, but let's be sure
+		span = noopSpan{}
+	}
+	return ContextWithSpan(ctx, span), span
+}
+
+// noopSpan is an implementation of Span that preforms no operations.
+type noopSpan struct{}
+
+var _ Span = noopSpan{}
+
+// SpanContext returns an empty span context.
+func (noopSpan) SpanContext() SpanContext { return SpanContext{} }
+
+// IsRecording always returns false.
+func (noopSpan) IsRecording() bool { return false }
+
+// SetStatus does nothing.
+func (noopSpan) SetStatus(codes.Code, string) {}
+
+// SetError does nothing.
+func (noopSpan) SetError(bool) {}
+
+// SetAttributes does nothing.
+func (noopSpan) SetAttributes(...attribute.KeyValue) {}
+
+// End does nothing.
+func (noopSpan) End(...SpanEndOption) {}
+
+// RecordError does nothing.
+func (noopSpan) RecordError(error, ...EventOption) {}
+
+// AddEvent does nothing.
+func (noopSpan) AddEvent(string, ...EventOption) {}
+
+// SetName does nothing.
+func (noopSpan) SetName(string) {}
+
+// TracerProvider returns a no-op TracerProvider
+func (noopSpan) TracerProvider() TracerProvider { return noopTracerProvider{} }
diff --git a/vendor/go.opentelemetry.io/otel/trace/trace.go b/vendor/go.opentelemetry.io/otel/trace/trace.go
new file mode 100644
index 000000000..15eb4673b
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/trace/trace.go
@@ -0,0 +1,515 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package trace // import "go.opentelemetry.io/otel/trace"
+
+import (
+	"bytes"
+	"context"
+	"encoding/hex"
+	"encoding/json"
+
+	"go.opentelemetry.io/otel/attribute"
+	"go.opentelemetry.io/otel/codes"
+)
+
+const (
+	// FlagsSampled is a bitmask with the sampled bit set. A SpanContext
+	// with the sampling bit set means the span is sampled.
+	FlagsSampled = TraceFlags(0x01)
+
+	errInvalidHexID errorConst = "trace-id and span-id can only contain [0-9a-f] characters, all lowercase"
+
+	errInvalidTraceIDLength errorConst = "hex encoded trace-id must have length equals to 32"
+	errNilTraceID           errorConst = "trace-id can't be all zero"
+
+	errInvalidSpanIDLength errorConst = "hex encoded span-id must have length equals to 16"
+	errNilSpanID           errorConst = "span-id can't be all zero"
+)
+
+type errorConst string
+
+func (e errorConst) Error() string {
+	return string(e)
+}
+
+// TraceID is a unique identity of a trace.
+// nolint:revive // revive complains about stutter of `trace.TraceID`.
+type TraceID [16]byte
+
+var nilTraceID TraceID
+var _ json.Marshaler = nilTraceID
+
+// IsValid checks whether the trace TraceID is valid. A valid trace ID does
+// not consist of zeros only.
+func (t TraceID) IsValid() bool {
+	return !bytes.Equal(t[:], nilTraceID[:])
+}
+
+// MarshalJSON implements a custom marshal function to encode TraceID
+// as a hex string.
+func (t TraceID) MarshalJSON() ([]byte, error) {
+	return json.Marshal(t.String())
+}
+
+// String returns the hex string representation form of a TraceID
+func (t TraceID) String() string {
+	return hex.EncodeToString(t[:])
+}
+
+// SpanID is a unique identity of a span in a trace.
+type SpanID [8]byte
+
+var nilSpanID SpanID
+var _ json.Marshaler = nilSpanID
+
+// IsValid checks whether the SpanID is valid. A valid SpanID does not consist
+// of zeros only.
+func (s SpanID) IsValid() bool {
+	return !bytes.Equal(s[:], nilSpanID[:])
+}
+
+// MarshalJSON implements a custom marshal function to encode SpanID
+// as a hex string.
+func (s SpanID) MarshalJSON() ([]byte, error) {
+	return json.Marshal(s.String())
+}
+
+// String returns the hex string representation form of a SpanID
+func (s SpanID) String() string {
+	return hex.EncodeToString(s[:])
+}
+
+// TraceIDFromHex returns a TraceID from a hex string if it is compliant with
+// the W3C trace-context specification.  See more at
+// https://www.w3.org/TR/trace-context/#trace-id
+// nolint:revive // revive complains about stutter of `trace.TraceIDFromHex`.
+func TraceIDFromHex(h string) (TraceID, error) {
+	t := TraceID{}
+	if len(h) != 32 {
+		return t, errInvalidTraceIDLength
+	}
+
+	if err := decodeHex(h, t[:]); err != nil {
+		return t, err
+	}
+
+	if !t.IsValid() {
+		return t, errNilTraceID
+	}
+	return t, nil
+}
+
+// SpanIDFromHex returns a SpanID from a hex string if it is compliant
+// with the w3c trace-context specification.
+// See more at https://www.w3.org/TR/trace-context/#parent-id
+func SpanIDFromHex(h string) (SpanID, error) {
+	s := SpanID{}
+	if len(h) != 16 {
+		return s, errInvalidSpanIDLength
+	}
+
+	if err := decodeHex(h, s[:]); err != nil {
+		return s, err
+	}
+
+	if !s.IsValid() {
+		return s, errNilSpanID
+	}
+	return s, nil
+}
+
+func decodeHex(h string, b []byte) error {
+	for _, r := range h {
+		switch {
+		case 'a' <= r && r <= 'f':
+			continue
+		case '0' <= r && r <= '9':
+			continue
+		default:
+			return errInvalidHexID
+		}
+	}
+
+	decoded, err := hex.DecodeString(h)
+	if err != nil {
+		return err
+	}
+
+	copy(b, decoded)
+	return nil
+}
+
+// TraceFlags contains flags that can be set on a SpanContext
+type TraceFlags byte //nolint:revive // revive complains about stutter of `trace.TraceFlags`.
+
+// IsSampled returns if the sampling bit is set in the TraceFlags.
+func (tf TraceFlags) IsSampled() bool {
+	return tf&FlagsSampled == FlagsSampled
+}
+
+// WithSampled sets the sampling bit in a new copy of the TraceFlags.
+func (tf TraceFlags) WithSampled(sampled bool) TraceFlags {
+	if sampled {
+		return tf | FlagsSampled
+	}
+
+	return tf &^ FlagsSampled
+}
+
+// MarshalJSON implements a custom marshal function to encode TraceFlags
+// as a hex string.
+func (tf TraceFlags) MarshalJSON() ([]byte, error) {
+	return json.Marshal(tf.String())
+}
+
+// String returns the hex string representation form of TraceFlags
+func (tf TraceFlags) String() string {
+	return hex.EncodeToString([]byte{byte(tf)}[:])
+}
+
+// SpanContextConfig contains mutable fields usable for constructing
+// an immutable SpanContext.
+type SpanContextConfig struct {
+	TraceID    TraceID
+	SpanID     SpanID
+	TraceFlags TraceFlags
+	TraceState TraceState
+	Remote     bool
+}
+
+// NewSpanContext constructs a SpanContext using values from the provided
+// SpanContextConfig.
+func NewSpanContext(config SpanContextConfig) SpanContext {
+	return SpanContext{
+		traceID:    config.TraceID,
+		spanID:     config.SpanID,
+		traceFlags: config.TraceFlags,
+		traceState: config.TraceState,
+		remote:     config.Remote,
+	}
+}
+
+// SpanContext contains identifying trace information about a Span.
+type SpanContext struct {
+	traceID    TraceID
+	spanID     SpanID
+	traceFlags TraceFlags
+	traceState TraceState
+	remote     bool
+}
+
+var _ json.Marshaler = SpanContext{}
+
+// IsValid returns if the SpanContext is valid. A valid span context has a
+// valid TraceID and SpanID.
+func (sc SpanContext) IsValid() bool {
+	return sc.HasTraceID() && sc.HasSpanID()
+}
+
+// IsRemote indicates whether the SpanContext represents a remotely-created Span.
+func (sc SpanContext) IsRemote() bool {
+	return sc.remote
+}
+
+// WithRemote returns a copy of sc with the Remote property set to remote.
+func (sc SpanContext) WithRemote(remote bool) SpanContext {
+	return SpanContext{
+		traceID:    sc.traceID,
+		spanID:     sc.spanID,
+		traceFlags: sc.traceFlags,
+		traceState: sc.traceState,
+		remote:     remote,
+	}
+}
+
+// TraceID returns the TraceID from the SpanContext.
+func (sc SpanContext) TraceID() TraceID {
+	return sc.traceID
+}
+
+// HasTraceID checks if the SpanContext has a valid TraceID.
+func (sc SpanContext) HasTraceID() bool {
+	return sc.traceID.IsValid()
+}
+
+// WithTraceID returns a new SpanContext with the TraceID replaced.
+func (sc SpanContext) WithTraceID(traceID TraceID) SpanContext {
+	return SpanContext{
+		traceID:    traceID,
+		spanID:     sc.spanID,
+		traceFlags: sc.traceFlags,
+		traceState: sc.traceState,
+		remote:     sc.remote,
+	}
+}
+
+// SpanID returns the SpanID from the SpanContext.
+func (sc SpanContext) SpanID() SpanID {
+	return sc.spanID
+}
+
+// HasSpanID checks if the SpanContext has a valid SpanID.
+func (sc SpanContext) HasSpanID() bool {
+	return sc.spanID.IsValid()
+}
+
+// WithSpanID returns a new SpanContext with the SpanID replaced.
+func (sc SpanContext) WithSpanID(spanID SpanID) SpanContext {
+	return SpanContext{
+		traceID:    sc.traceID,
+		spanID:     spanID,
+		traceFlags: sc.traceFlags,
+		traceState: sc.traceState,
+		remote:     sc.remote,
+	}
+}
+
+// TraceFlags returns the flags from the SpanContext.
+func (sc SpanContext) TraceFlags() TraceFlags {
+	return sc.traceFlags
+}
+
+// IsSampled returns if the sampling bit is set in the SpanContext's TraceFlags.
+func (sc SpanContext) IsSampled() bool {
+	return sc.traceFlags.IsSampled()
+}
+
+// WithTraceFlags returns a new SpanContext with the TraceFlags replaced.
+func (sc SpanContext) WithTraceFlags(flags TraceFlags) SpanContext {
+	return SpanContext{
+		traceID:    sc.traceID,
+		spanID:     sc.spanID,
+		traceFlags: flags,
+		traceState: sc.traceState,
+		remote:     sc.remote,
+	}
+}
+
+// TraceState returns the TraceState from the SpanContext.
+func (sc SpanContext) TraceState() TraceState {
+	return sc.traceState
+}
+
+// WithTraceState returns a new SpanContext with the TraceState replaced.
+func (sc SpanContext) WithTraceState(state TraceState) SpanContext {
+	return SpanContext{
+		traceID:    sc.traceID,
+		spanID:     sc.spanID,
+		traceFlags: sc.traceFlags,
+		traceState: state,
+		remote:     sc.remote,
+	}
+}
+
+// Equal is a predicate that determines whether two SpanContext values are equal.
+func (sc SpanContext) Equal(other SpanContext) bool {
+	return sc.traceID == other.traceID &&
+		sc.spanID == other.spanID &&
+		sc.traceFlags == other.traceFlags &&
+		sc.traceState.String() == other.traceState.String() &&
+		sc.remote == other.remote
+}
+
+// MarshalJSON implements a custom marshal function to encode a SpanContext.
+func (sc SpanContext) MarshalJSON() ([]byte, error) {
+	return json.Marshal(SpanContextConfig{
+		TraceID:    sc.traceID,
+		SpanID:     sc.spanID,
+		TraceFlags: sc.traceFlags,
+		TraceState: sc.traceState,
+		Remote:     sc.remote,
+	})
+}
+
+// Span is the individual component of a trace. It represents a single named
+// and timed operation of a workflow that is traced. A Tracer is used to
+// create a Span and it is then up to the operation the Span represents to
+// properly end the Span when the operation itself ends.
+//
+// Warning: methods may be added to this interface in minor releases.
+type Span interface {
+	// End completes the Span. The Span is considered complete and ready to be
+	// delivered through the rest of the telemetry pipeline after this method
+	// is called. Therefore, updates to the Span are not allowed after this
+	// method has been called.
+	End(options ...SpanEndOption)
+
+	// AddEvent adds an event with the provided name and options.
+	AddEvent(name string, options ...EventOption)
+
+	// IsRecording returns the recording state of the Span. It will return
+	// true if the Span is active and events can be recorded.
+	IsRecording() bool
+
+	// RecordError will record err as an exception span event for this span. An
+	// additional call to SetStatus is required if the Status of the Span should
+	// be set to Error, as this method does not change the Span status. If this
+	// span is not being recorded or err is nil then this method does nothing.
+	RecordError(err error, options ...EventOption)
+
+	// SpanContext returns the SpanContext of the Span. The returned SpanContext
+	// is usable even after the End method has been called for the Span.
+	SpanContext() SpanContext
+
+	// SetStatus sets the status of the Span in the form of a code and a
+	// description, overriding previous values set. The description is only
+	// included in a status when the code is for an error.
+	SetStatus(code codes.Code, description string)
+
+	// SetName sets the Span name.
+	SetName(name string)
+
+	// SetAttributes sets kv as attributes of the Span. If a key from kv
+	// already exists for an attribute of the Span it will be overwritten with
+	// the value contained in kv.
+	SetAttributes(kv ...attribute.KeyValue)
+
+	// TracerProvider returns a TracerProvider that can be used to generate
+	// additional Spans on the same telemetry pipeline as the current Span.
+	TracerProvider() TracerProvider
+}
+
+// Link is the relationship between two Spans. The relationship can be within
+// the same Trace or across different Traces.
+//
+// For example, a Link is used in the following situations:
+//
+//   1. Batch Processing: A batch of operations may contain operations
+//      associated with one or more traces/spans. Since there can only be one
+//      parent SpanContext, a Link is used to keep reference to the
+//      SpanContext of all operations in the batch.
+//   2. Public Endpoint: A SpanContext for an in incoming client request on a
+//      public endpoint should be considered untrusted. In such a case, a new
+//      trace with its own identity and sampling decision needs to be created,
+//      but this new trace needs to be related to the original trace in some
+//      form. A Link is used to keep reference to the original SpanContext and
+//      track the relationship.
+type Link struct {
+	// SpanContext of the linked Span.
+	SpanContext SpanContext
+
+	// Attributes describe the aspects of the link.
+	Attributes []attribute.KeyValue
+
+	// DroppedAttributeCount is the number of attributes that were not
+	// recorded due to configured limits being reached.
+	DroppedAttributeCount int
+}
+
+// SpanKind is the role a Span plays in a Trace.
+type SpanKind int
+
+// As a convenience, these match the proto definition, see
+// https://github.com/open-telemetry/opentelemetry-proto/blob/30d237e1ff3ab7aa50e0922b5bebdd93505090af/opentelemetry/proto/trace/v1/trace.proto#L101-L129
+//
+// The unspecified value is not a valid `SpanKind`. Use `ValidateSpanKind()`
+// to coerce a span kind to a valid value.
+const (
+	// SpanKindUnspecified is an unspecified SpanKind and is not a valid
+	// SpanKind. SpanKindUnspecified should be replaced with SpanKindInternal
+	// if it is received.
+	SpanKindUnspecified SpanKind = 0
+	// SpanKindInternal is a SpanKind for a Span that represents an internal
+	// operation within an application.
+	SpanKindInternal SpanKind = 1
+	// SpanKindServer is a SpanKind for a Span that represents the operation
+	// of handling a request from a client.
+	SpanKindServer SpanKind = 2
+	// SpanKindClient is a SpanKind for a Span that represents the operation
+	// of client making a request to a server.
+	SpanKindClient SpanKind = 3
+	// SpanKindProducer is a SpanKind for a Span that represents the operation
+	// of a producer sending a message to a message broker. Unlike
+	// SpanKindClient and SpanKindServer, there is often no direct
+	// relationship between this kind of Span and a SpanKindConsumer kind. A
+	// SpanKindProducer Span will end once the message is accepted by the
+	// message broker which might not overlap with the processing of that
+	// message.
+	SpanKindProducer SpanKind = 4
+	// SpanKindConsumer is a SpanKind for a Span that represents the operation
+	// of a consumer receiving a message from a message broker. Like
+	// SpanKindProducer Spans, there is often no direct relationship between
+	// this Span and the Span that produced the message.
+	SpanKindConsumer SpanKind = 5
+)
+
+// ValidateSpanKind returns a valid span kind value.  This will coerce
+// invalid values into the default value, SpanKindInternal.
+func ValidateSpanKind(spanKind SpanKind) SpanKind {
+	switch spanKind {
+	case SpanKindInternal,
+		SpanKindServer,
+		SpanKindClient,
+		SpanKindProducer,
+		SpanKindConsumer:
+		// valid
+		return spanKind
+	default:
+		return SpanKindInternal
+	}
+}
+
+// String returns the specified name of the SpanKind in lower-case.
+func (sk SpanKind) String() string {
+	switch sk {
+	case SpanKindInternal:
+		return "internal"
+	case SpanKindServer:
+		return "server"
+	case SpanKindClient:
+		return "client"
+	case SpanKindProducer:
+		return "producer"
+	case SpanKindConsumer:
+		return "consumer"
+	default:
+		return "unspecified"
+	}
+}
+
+// Tracer is the creator of Spans.
+//
+// Warning: methods may be added to this interface in minor releases.
+type Tracer interface {
+	// Start creates a span and a context.Context containing the newly-created span.
+	//
+	// If the context.Context provided in `ctx` contains a Span then the newly-created
+	// Span will be a child of that span, otherwise it will be a root span. This behavior
+	// can be overridden by providing `WithNewRoot()` as a SpanOption, causing the
+	// newly-created Span to be a root span even if `ctx` contains a Span.
+	//
+	// When creating a Span it is recommended to provide all known span attributes using
+	// the `WithAttributes()` SpanOption as samplers will only have access to the
+	// attributes provided when a Span is created.
+	//
+	// Any Span that is created MUST also be ended. This is the responsibility of the user.
+	// Implementations of this API may leak memory or other resources if Spans are not ended.
+	Start(ctx context.Context, spanName string, opts ...SpanStartOption) (context.Context, Span)
+}
+
+// TracerProvider provides access to instrumentation Tracers.
+//
+// Warning: methods may be added to this interface in minor releases.
+type TracerProvider interface {
+	// Tracer creates an implementation of the Tracer interface.
+	// The instrumentationName must be the name of the library providing
+	// instrumentation. This name may be the same as the instrumented code
+	// only if that code provides built-in instrumentation. If the
+	// instrumentationName is empty, then a implementation defined default
+	// name will be used instead.
+	//
+	// This method must be concurrency safe.
+	Tracer(instrumentationName string, opts ...TracerOption) Tracer
+}
diff --git a/vendor/go.opentelemetry.io/otel/trace/tracestate.go b/vendor/go.opentelemetry.io/otel/trace/tracestate.go
new file mode 100644
index 000000000..f457466a2
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/trace/tracestate.go
@@ -0,0 +1,217 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package trace
+
+import (
+	"encoding/json"
+	"fmt"
+	"regexp"
+	"strings"
+)
+
+var (
+	maxListMembers = 32
+
+	listDelimiter = ","
+
+	// based on the W3C Trace Context specification, see
+	// https://www.w3.org/TR/trace-context-1/#tracestate-header
+	noTenantKeyFormat   = `[a-z][_0-9a-z\-\*\/]{0,255}`
+	withTenantKeyFormat = `[a-z0-9][_0-9a-z\-\*\/]{0,240}@[a-z][_0-9a-z\-\*\/]{0,13}`
+	valueFormat         = `[\x20-\x2b\x2d-\x3c\x3e-\x7e]{0,255}[\x21-\x2b\x2d-\x3c\x3e-\x7e]`
+
+	keyRe    = regexp.MustCompile(`^((` + noTenantKeyFormat + `)|(` + withTenantKeyFormat + `))$`)
+	valueRe  = regexp.MustCompile(`^(` + valueFormat + `)$`)
+	memberRe = regexp.MustCompile(`^\s*((` + noTenantKeyFormat + `)|(` + withTenantKeyFormat + `))=(` + valueFormat + `)\s*$`)
+
+	errInvalidKey    errorConst = "invalid tracestate key"
+	errInvalidValue  errorConst = "invalid tracestate value"
+	errInvalidMember errorConst = "invalid tracestate list-member"
+	errMemberNumber  errorConst = "too many list-members in tracestate"
+	errDuplicate     errorConst = "duplicate list-member in tracestate"
+)
+
+type member struct {
+	Key   string
+	Value string
+}
+
+func newMember(key, value string) (member, error) {
+	if !keyRe.MatchString(key) {
+		return member{}, fmt.Errorf("%w: %s", errInvalidKey, key)
+	}
+	if !valueRe.MatchString(value) {
+		return member{}, fmt.Errorf("%w: %s", errInvalidValue, value)
+	}
+	return member{Key: key, Value: value}, nil
+}
+
+func parseMemeber(m string) (member, error) {
+	matches := memberRe.FindStringSubmatch(m)
+	if len(matches) != 5 {
+		return member{}, fmt.Errorf("%w: %s", errInvalidMember, m)
+	}
+
+	return member{
+		Key:   matches[1],
+		Value: matches[4],
+	}, nil
+
+}
+
+// String encodes member into a string compliant with the W3C Trace Context
+// specification.
+func (m member) String() string {
+	return fmt.Sprintf("%s=%s", m.Key, m.Value)
+}
+
+// TraceState provides additional vendor-specific trace identification
+// information across different distributed tracing systems. It represents an
+// immutable list consisting of key/value pairs, each pair is referred to as a
+// list-member.
+//
+// TraceState conforms to the W3C Trace Context specification
+// (https://www.w3.org/TR/trace-context-1). All operations that create or copy
+// a TraceState do so by validating all input and will only produce TraceState
+// that conform to the specification. Specifically, this means that all
+// list-member's key/value pairs are valid, no duplicate list-members exist,
+// and the maximum number of list-members (32) is not exceeded.
+type TraceState struct { //nolint:revive // revive complains about stutter of `trace.TraceState`
+	// list is the members in order.
+	list []member
+}
+
+var _ json.Marshaler = TraceState{}
+
+// ParseTraceState attempts to decode a TraceState from the passed
+// string. It returns an error if the input is invalid according to the W3C
+// Trace Context specification.
+func ParseTraceState(tracestate string) (TraceState, error) {
+	if tracestate == "" {
+		return TraceState{}, nil
+	}
+
+	wrapErr := func(err error) error {
+		return fmt.Errorf("failed to parse tracestate: %w", err)
+	}
+
+	var members []member
+	found := make(map[string]struct{})
+	for _, memberStr := range strings.Split(tracestate, listDelimiter) {
+		if len(memberStr) == 0 {
+			continue
+		}
+
+		m, err := parseMemeber(memberStr)
+		if err != nil {
+			return TraceState{}, wrapErr(err)
+		}
+
+		if _, ok := found[m.Key]; ok {
+			return TraceState{}, wrapErr(errDuplicate)
+		}
+		found[m.Key] = struct{}{}
+
+		members = append(members, m)
+		if n := len(members); n > maxListMembers {
+			return TraceState{}, wrapErr(errMemberNumber)
+		}
+	}
+
+	return TraceState{list: members}, nil
+}
+
+// MarshalJSON marshals the TraceState into JSON.
+func (ts TraceState) MarshalJSON() ([]byte, error) {
+	return json.Marshal(ts.String())
+}
+
+// String encodes the TraceState into a string compliant with the W3C
+// Trace Context specification. The returned string will be invalid if the
+// TraceState contains any invalid members.
+func (ts TraceState) String() string {
+	members := make([]string, len(ts.list))
+	for i, m := range ts.list {
+		members[i] = m.String()
+	}
+	return strings.Join(members, listDelimiter)
+}
+
+// Get returns the value paired with key from the corresponding TraceState
+// list-member if it exists, otherwise an empty string is returned.
+func (ts TraceState) Get(key string) string {
+	for _, member := range ts.list {
+		if member.Key == key {
+			return member.Value
+		}
+	}
+
+	return ""
+}
+
+// Insert adds a new list-member defined by the key/value pair to the
+// TraceState. If a list-member already exists for the given key, that
+// list-member's value is updated. The new or updated list-member is always
+// moved to the beginning of the TraceState as specified by the W3C Trace
+// Context specification.
+//
+// If key or value are invalid according to the W3C Trace Context
+// specification an error is returned with the original TraceState.
+//
+// If adding a new list-member means the TraceState would have more members
+// than is allowed an error is returned instead with the original TraceState.
+func (ts TraceState) Insert(key, value string) (TraceState, error) {
+	m, err := newMember(key, value)
+	if err != nil {
+		return ts, err
+	}
+
+	cTS := ts.Delete(key)
+	if cTS.Len()+1 > maxListMembers {
+		// TODO (MrAlias): When the second version of the Trace Context
+		// specification is published this needs to not return an error.
+		// Instead it should drop the "right-most" member and insert the new
+		// member at the front.
+		//
+		// https://github.com/w3c/trace-context/pull/448
+		return ts, fmt.Errorf("failed to insert: %w", errMemberNumber)
+	}
+
+	cTS.list = append(cTS.list, member{})
+	copy(cTS.list[1:], cTS.list)
+	cTS.list[0] = m
+
+	return cTS, nil
+}
+
+// Delete returns a copy of the TraceState with the list-member identified by
+// key removed.
+func (ts TraceState) Delete(key string) TraceState {
+	members := make([]member, ts.Len())
+	copy(members, ts.list)
+	for i, member := range ts.list {
+		if member.Key == key {
+			members = append(members[:i], members[i+1:]...)
+			// TraceState should contain no duplicate members.
+			break
+		}
+	}
+	return TraceState{list: members}
+}
+
+// Len returns the number of list-members in the TraceState.
+func (ts TraceState) Len() int {
+	return len(ts.list)
+}
diff --git a/vendor/go.opentelemetry.io/otel/verify_examples.sh b/vendor/go.opentelemetry.io/otel/verify_examples.sh
new file mode 100644
index 000000000..dbb61a422
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/verify_examples.sh
@@ -0,0 +1,85 @@
+#!/bin/bash
+
+# Copyright The OpenTelemetry Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+set -euo pipefail
+
+cd $(dirname $0)
+TOOLS_DIR=$(pwd)/.tools
+
+if [ -z "${GOPATH}" ] ; then
+	printf "GOPATH is not defined.\n"
+	exit -1
+fi
+
+if [ ! -d "${GOPATH}" ] ; then
+	printf "GOPATH ${GOPATH} is invalid \n"
+	exit -1
+fi
+
+# Pre-requisites
+if ! git diff --quiet; then \
+	git status
+	printf "\n\nError: working tree is not clean\n"
+	exit -1
+fi
+
+if [ "$(git tag --contains $(git log -1 --pretty=format:"%H"))" = "" ] ; then
+	printf "$(git log -1)"
+	printf "\n\nError: HEAD is not pointing to a tagged version"
+fi
+
+make ${TOOLS_DIR}/gojq
+
+DIR_TMP="${GOPATH}/src/oteltmp/"
+rm -rf $DIR_TMP
+mkdir -p $DIR_TMP
+
+printf "Copy examples to ${DIR_TMP}\n"
+cp -a ./example ${DIR_TMP}
+
+# Update go.mod files
+printf "Update go.mod: rename module and remove replace\n"
+
+PACKAGE_DIRS=$(find . -mindepth 2 -type f -name 'go.mod' -exec dirname {} \; | egrep 'example' | sed 's/^\.\///' | sort)
+
+for dir in $PACKAGE_DIRS; do
+	printf "  Update go.mod for $dir\n"
+	(cd "${DIR_TMP}/${dir}" && \
+	 # replaces is ("mod1" "mod2" …)
+	 replaces=($(go mod edit -json | ${TOOLS_DIR}/gojq '.Replace[].Old.Path')) && \
+	 # strip double quotes
+	 replaces=("${replaces[@]%\"}") && \
+	 replaces=("${replaces[@]#\"}") && \
+	 # make an array (-dropreplace=mod1 -dropreplace=mod2 …)
+	 dropreplaces=("${replaces[@]/#/-dropreplace=}") && \
+	 go mod edit -module "oteltmp/${dir}" "${dropreplaces[@]}" && \
+	 go mod tidy)
+done
+printf "Update done:\n\n"
+
+# Build directories that contain main package. These directories are different than
+# directories that contain go.mod files.
+printf "Build examples:\n"
+EXAMPLES=$(./get_main_pkgs.sh ./example)
+for ex in $EXAMPLES; do
+	printf "  Build $ex in ${DIR_TMP}/${ex}\n"
+	(cd "${DIR_TMP}/${ex}" && \
+	 go build .)
+done
+
+# Cleanup
+printf "Remove copied files.\n"
+rm -rf $DIR_TMP
diff --git a/vendor/go.opentelemetry.io/otel/version.go b/vendor/go.opentelemetry.io/otel/version.go
new file mode 100644
index 000000000..69bb46731
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/version.go
@@ -0,0 +1,20 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package otel // import "go.opentelemetry.io/otel"
+
+// Version is the current release version of OpenTelemetry in use.
+func Version() string {
+	return "1.0.0-RC1"
+}
diff --git a/vendor/go.opentelemetry.io/otel/versions.yaml b/vendor/go.opentelemetry.io/otel/versions.yaml
new file mode 100644
index 000000000..1b6152b9b
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/versions.yaml
@@ -0,0 +1,56 @@
+# Copyright The OpenTelemetry Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+module-sets:
+  stable-v1:
+    version: v1.0.0-RC1
+    modules:
+      - go.opentelemetry.io/otel
+      - go.opentelemetry.io/otel/example/jaeger
+      - go.opentelemetry.io/otel/example/namedtracer
+      - go.opentelemetry.io/otel/example/otel-collector
+      - go.opentelemetry.io/otel/example/passthrough
+      - go.opentelemetry.io/otel/example/zipkin
+      - go.opentelemetry.io/otel/exporters/jaeger
+      - go.opentelemetry.io/otel/exporters/zipkin
+      - go.opentelemetry.io/otel/exporters/otlp/otlptrace
+      - go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc
+      - go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp
+      - go.opentelemetry.io/otel/exporters/stdout/stdouttrace
+      - go.opentelemetry.io/otel/exporters/trace/jaeger
+      - go.opentelemetry.io/otel/exporters/trace/zipkin
+      - go.opentelemetry.io/otel/oteltest
+      - go.opentelemetry.io/otel/trace
+      - go.opentelemetry.io/otel/sdk
+  experimental-metrics:
+    version: v0.21.0
+    modules:
+      - go.opentelemetry.io/otel/example/prometheus
+      - go.opentelemetry.io/otel/exporters/metric/prometheus
+      - go.opentelemetry.io/otel/exporters/otlp/otlpmetric
+      - go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc
+      - go.opentelemetry.io/otel/exporters/prometheus
+      - go.opentelemetry.io/otel/exporters/stdout/stdoutmetric
+      - go.opentelemetry.io/otel/internal/metric
+      - go.opentelemetry.io/otel/metric
+      - go.opentelemetry.io/otel/sdk/export/metric
+      - go.opentelemetry.io/otel/sdk/metric
+  bridge:
+    version: v0.21.0
+    modules:
+      - go.opentelemetry.io/otel/bridge/opencensus
+      - go.opentelemetry.io/otel/bridge/opentracing
+      - go.opentelemetry.io/otel/example/opencensus
+excluded-modules:
+  - go.opentelemetry.io/otel/internal/tools
\ No newline at end of file
diff --git a/vendor/go.opentelemetry.io/proto/otlp/LICENSE b/vendor/go.opentelemetry.io/proto/otlp/LICENSE
new file mode 100644
index 000000000..261eeb9e9
--- /dev/null
+++ b/vendor/go.opentelemetry.io/proto/otlp/LICENSE
@@ -0,0 +1,201 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
diff --git a/vendor/go.opentelemetry.io/proto/otlp/collector/trace/v1/trace_config.pb.go b/vendor/go.opentelemetry.io/proto/otlp/collector/trace/v1/trace_config.pb.go
new file mode 100644
index 000000000..07f7e9b1f
--- /dev/null
+++ b/vendor/go.opentelemetry.io/proto/otlp/collector/trace/v1/trace_config.pb.go
@@ -0,0 +1,573 @@
+// Copyright 2019, OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.23.0
+// 	protoc        v3.13.0
+// source: opentelemetry/proto/trace/v1/trace_config.proto
+
+package v1
+
+import (
+	proto "github.com/golang/protobuf/proto"
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+// This is a compile-time assertion that a sufficiently up-to-date version
+// of the legacy proto package is being used.
+const _ = proto.ProtoPackageIsVersion4
+
+// How spans should be sampled:
+// - Always off
+// - Always on
+// - Always follow the parent Span's decision (off if no parent).
+type ConstantSampler_ConstantDecision int32
+
+const (
+	ConstantSampler_ALWAYS_OFF    ConstantSampler_ConstantDecision = 0
+	ConstantSampler_ALWAYS_ON     ConstantSampler_ConstantDecision = 1
+	ConstantSampler_ALWAYS_PARENT ConstantSampler_ConstantDecision = 2
+)
+
+// Enum value maps for ConstantSampler_ConstantDecision.
+var (
+	ConstantSampler_ConstantDecision_name = map[int32]string{
+		0: "ALWAYS_OFF",
+		1: "ALWAYS_ON",
+		2: "ALWAYS_PARENT",
+	}
+	ConstantSampler_ConstantDecision_value = map[string]int32{
+		"ALWAYS_OFF":    0,
+		"ALWAYS_ON":     1,
+		"ALWAYS_PARENT": 2,
+	}
+)
+
+func (x ConstantSampler_ConstantDecision) Enum() *ConstantSampler_ConstantDecision {
+	p := new(ConstantSampler_ConstantDecision)
+	*p = x
+	return p
+}
+
+func (x ConstantSampler_ConstantDecision) String() string {
+	return protoimpl.X.EnumStringOf(x.Descriptor(), protoreflect.EnumNumber(x))
+}
+
+func (ConstantSampler_ConstantDecision) Descriptor() protoreflect.EnumDescriptor {
+	return file_opentelemetry_proto_trace_v1_trace_config_proto_enumTypes[0].Descriptor()
+}
+
+func (ConstantSampler_ConstantDecision) Type() protoreflect.EnumType {
+	return &file_opentelemetry_proto_trace_v1_trace_config_proto_enumTypes[0]
+}
+
+func (x ConstantSampler_ConstantDecision) Number() protoreflect.EnumNumber {
+	return protoreflect.EnumNumber(x)
+}
+
+// Deprecated: Use ConstantSampler_ConstantDecision.Descriptor instead.
+func (ConstantSampler_ConstantDecision) EnumDescriptor() ([]byte, []int) {
+	return file_opentelemetry_proto_trace_v1_trace_config_proto_rawDescGZIP(), []int{1, 0}
+}
+
+// Global configuration of the trace service. All fields must be specified, or
+// the default (zero) values will be used for each type.
+type TraceConfig struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// The global default sampler used to make decisions on span sampling.
+	//
+	// Types that are assignable to Sampler:
+	//	*TraceConfig_ConstantSampler
+	//	*TraceConfig_TraceIdRatioBased
+	//	*TraceConfig_RateLimitingSampler
+	Sampler isTraceConfig_Sampler `protobuf_oneof:"sampler"`
+	// The global default max number of attributes per span.
+	MaxNumberOfAttributes int64 `protobuf:"varint,4,opt,name=max_number_of_attributes,json=maxNumberOfAttributes,proto3" json:"max_number_of_attributes,omitempty"`
+	// The global default max number of annotation events per span.
+	MaxNumberOfTimedEvents int64 `protobuf:"varint,5,opt,name=max_number_of_timed_events,json=maxNumberOfTimedEvents,proto3" json:"max_number_of_timed_events,omitempty"`
+	// The global default max number of attributes per timed event.
+	MaxNumberOfAttributesPerTimedEvent int64 `protobuf:"varint,6,opt,name=max_number_of_attributes_per_timed_event,json=maxNumberOfAttributesPerTimedEvent,proto3" json:"max_number_of_attributes_per_timed_event,omitempty"`
+	// The global default max number of link entries per span.
+	MaxNumberOfLinks int64 `protobuf:"varint,7,opt,name=max_number_of_links,json=maxNumberOfLinks,proto3" json:"max_number_of_links,omitempty"`
+	// The global default max number of attributes per span.
+	MaxNumberOfAttributesPerLink int64 `protobuf:"varint,8,opt,name=max_number_of_attributes_per_link,json=maxNumberOfAttributesPerLink,proto3" json:"max_number_of_attributes_per_link,omitempty"`
+}
+
+func (x *TraceConfig) Reset() {
+	*x = TraceConfig{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_opentelemetry_proto_trace_v1_trace_config_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *TraceConfig) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*TraceConfig) ProtoMessage() {}
+
+func (x *TraceConfig) ProtoReflect() protoreflect.Message {
+	mi := &file_opentelemetry_proto_trace_v1_trace_config_proto_msgTypes[0]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use TraceConfig.ProtoReflect.Descriptor instead.
+func (*TraceConfig) Descriptor() ([]byte, []int) {
+	return file_opentelemetry_proto_trace_v1_trace_config_proto_rawDescGZIP(), []int{0}
+}
+
+func (m *TraceConfig) GetSampler() isTraceConfig_Sampler {
+	if m != nil {
+		return m.Sampler
+	}
+	return nil
+}
+
+func (x *TraceConfig) GetConstantSampler() *ConstantSampler {
+	if x, ok := x.GetSampler().(*TraceConfig_ConstantSampler); ok {
+		return x.ConstantSampler
+	}
+	return nil
+}
+
+func (x *TraceConfig) GetTraceIdRatioBased() *TraceIdRatioBased {
+	if x, ok := x.GetSampler().(*TraceConfig_TraceIdRatioBased); ok {
+		return x.TraceIdRatioBased
+	}
+	return nil
+}
+
+func (x *TraceConfig) GetRateLimitingSampler() *RateLimitingSampler {
+	if x, ok := x.GetSampler().(*TraceConfig_RateLimitingSampler); ok {
+		return x.RateLimitingSampler
+	}
+	return nil
+}
+
+func (x *TraceConfig) GetMaxNumberOfAttributes() int64 {
+	if x != nil {
+		return x.MaxNumberOfAttributes
+	}
+	return 0
+}
+
+func (x *TraceConfig) GetMaxNumberOfTimedEvents() int64 {
+	if x != nil {
+		return x.MaxNumberOfTimedEvents
+	}
+	return 0
+}
+
+func (x *TraceConfig) GetMaxNumberOfAttributesPerTimedEvent() int64 {
+	if x != nil {
+		return x.MaxNumberOfAttributesPerTimedEvent
+	}
+	return 0
+}
+
+func (x *TraceConfig) GetMaxNumberOfLinks() int64 {
+	if x != nil {
+		return x.MaxNumberOfLinks
+	}
+	return 0
+}
+
+func (x *TraceConfig) GetMaxNumberOfAttributesPerLink() int64 {
+	if x != nil {
+		return x.MaxNumberOfAttributesPerLink
+	}
+	return 0
+}
+
+type isTraceConfig_Sampler interface {
+	isTraceConfig_Sampler()
+}
+
+type TraceConfig_ConstantSampler struct {
+	ConstantSampler *ConstantSampler `protobuf:"bytes,1,opt,name=constant_sampler,json=constantSampler,proto3,oneof"`
+}
+
+type TraceConfig_TraceIdRatioBased struct {
+	TraceIdRatioBased *TraceIdRatioBased `protobuf:"bytes,2,opt,name=trace_id_ratio_based,json=traceIdRatioBased,proto3,oneof"`
+}
+
+type TraceConfig_RateLimitingSampler struct {
+	RateLimitingSampler *RateLimitingSampler `protobuf:"bytes,3,opt,name=rate_limiting_sampler,json=rateLimitingSampler,proto3,oneof"`
+}
+
+func (*TraceConfig_ConstantSampler) isTraceConfig_Sampler() {}
+
+func (*TraceConfig_TraceIdRatioBased) isTraceConfig_Sampler() {}
+
+func (*TraceConfig_RateLimitingSampler) isTraceConfig_Sampler() {}
+
+// Sampler that always makes a constant decision on span sampling.
+type ConstantSampler struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Decision ConstantSampler_ConstantDecision `protobuf:"varint,1,opt,name=decision,proto3,enum=opentelemetry.proto.trace.v1.ConstantSampler_ConstantDecision" json:"decision,omitempty"`
+}
+
+func (x *ConstantSampler) Reset() {
+	*x = ConstantSampler{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_opentelemetry_proto_trace_v1_trace_config_proto_msgTypes[1]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *ConstantSampler) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*ConstantSampler) ProtoMessage() {}
+
+func (x *ConstantSampler) ProtoReflect() protoreflect.Message {
+	mi := &file_opentelemetry_proto_trace_v1_trace_config_proto_msgTypes[1]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use ConstantSampler.ProtoReflect.Descriptor instead.
+func (*ConstantSampler) Descriptor() ([]byte, []int) {
+	return file_opentelemetry_proto_trace_v1_trace_config_proto_rawDescGZIP(), []int{1}
+}
+
+func (x *ConstantSampler) GetDecision() ConstantSampler_ConstantDecision {
+	if x != nil {
+		return x.Decision
+	}
+	return ConstantSampler_ALWAYS_OFF
+}
+
+// Sampler that tries to uniformly sample traces with a given ratio.
+// The ratio of sampling a trace is equal to that of the specified ratio.
+type TraceIdRatioBased struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// The desired ratio of sampling. Must be within [0.0, 1.0].
+	SamplingRatio float64 `protobuf:"fixed64,1,opt,name=samplingRatio,proto3" json:"samplingRatio,omitempty"`
+}
+
+func (x *TraceIdRatioBased) Reset() {
+	*x = TraceIdRatioBased{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_opentelemetry_proto_trace_v1_trace_config_proto_msgTypes[2]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *TraceIdRatioBased) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*TraceIdRatioBased) ProtoMessage() {}
+
+func (x *TraceIdRatioBased) ProtoReflect() protoreflect.Message {
+	mi := &file_opentelemetry_proto_trace_v1_trace_config_proto_msgTypes[2]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use TraceIdRatioBased.ProtoReflect.Descriptor instead.
+func (*TraceIdRatioBased) Descriptor() ([]byte, []int) {
+	return file_opentelemetry_proto_trace_v1_trace_config_proto_rawDescGZIP(), []int{2}
+}
+
+func (x *TraceIdRatioBased) GetSamplingRatio() float64 {
+	if x != nil {
+		return x.SamplingRatio
+	}
+	return 0
+}
+
+// Sampler that tries to sample with a rate per time window.
+type RateLimitingSampler struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// Rate per second.
+	Qps int64 `protobuf:"varint,1,opt,name=qps,proto3" json:"qps,omitempty"`
+}
+
+func (x *RateLimitingSampler) Reset() {
+	*x = RateLimitingSampler{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_opentelemetry_proto_trace_v1_trace_config_proto_msgTypes[3]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *RateLimitingSampler) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*RateLimitingSampler) ProtoMessage() {}
+
+func (x *RateLimitingSampler) ProtoReflect() protoreflect.Message {
+	mi := &file_opentelemetry_proto_trace_v1_trace_config_proto_msgTypes[3]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use RateLimitingSampler.ProtoReflect.Descriptor instead.
+func (*RateLimitingSampler) Descriptor() ([]byte, []int) {
+	return file_opentelemetry_proto_trace_v1_trace_config_proto_rawDescGZIP(), []int{3}
+}
+
+func (x *RateLimitingSampler) GetQps() int64 {
+	if x != nil {
+		return x.Qps
+	}
+	return 0
+}
+
+var File_opentelemetry_proto_trace_v1_trace_config_proto protoreflect.FileDescriptor
+
+var file_opentelemetry_proto_trace_v1_trace_config_proto_rawDesc = []byte{
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+	0x6f, 0x33,
+}
+
+var (
+	file_opentelemetry_proto_trace_v1_trace_config_proto_rawDescOnce sync.Once
+	file_opentelemetry_proto_trace_v1_trace_config_proto_rawDescData = file_opentelemetry_proto_trace_v1_trace_config_proto_rawDesc
+)
+
+func file_opentelemetry_proto_trace_v1_trace_config_proto_rawDescGZIP() []byte {
+	file_opentelemetry_proto_trace_v1_trace_config_proto_rawDescOnce.Do(func() {
+		file_opentelemetry_proto_trace_v1_trace_config_proto_rawDescData = protoimpl.X.CompressGZIP(file_opentelemetry_proto_trace_v1_trace_config_proto_rawDescData)
+	})
+	return file_opentelemetry_proto_trace_v1_trace_config_proto_rawDescData
+}
+
+var file_opentelemetry_proto_trace_v1_trace_config_proto_enumTypes = make([]protoimpl.EnumInfo, 1)
+var file_opentelemetry_proto_trace_v1_trace_config_proto_msgTypes = make([]protoimpl.MessageInfo, 4)
+var file_opentelemetry_proto_trace_v1_trace_config_proto_goTypes = []interface{}{
+	(ConstantSampler_ConstantDecision)(0), // 0: opentelemetry.proto.trace.v1.ConstantSampler.ConstantDecision
+	(*TraceConfig)(nil),                   // 1: opentelemetry.proto.trace.v1.TraceConfig
+	(*ConstantSampler)(nil),               // 2: opentelemetry.proto.trace.v1.ConstantSampler
+	(*TraceIdRatioBased)(nil),             // 3: opentelemetry.proto.trace.v1.TraceIdRatioBased
+	(*RateLimitingSampler)(nil),           // 4: opentelemetry.proto.trace.v1.RateLimitingSampler
+}
+var file_opentelemetry_proto_trace_v1_trace_config_proto_depIdxs = []int32{
+	2, // 0: opentelemetry.proto.trace.v1.TraceConfig.constant_sampler:type_name -> opentelemetry.proto.trace.v1.ConstantSampler
+	3, // 1: opentelemetry.proto.trace.v1.TraceConfig.trace_id_ratio_based:type_name -> opentelemetry.proto.trace.v1.TraceIdRatioBased
+	4, // 2: opentelemetry.proto.trace.v1.TraceConfig.rate_limiting_sampler:type_name -> opentelemetry.proto.trace.v1.RateLimitingSampler
+	0, // 3: opentelemetry.proto.trace.v1.ConstantSampler.decision:type_name -> opentelemetry.proto.trace.v1.ConstantSampler.ConstantDecision
+	4, // [4:4] is the sub-list for method output_type
+	4, // [4:4] is the sub-list for method input_type
+	4, // [4:4] is the sub-list for extension type_name
+	4, // [4:4] is the sub-list for extension extendee
+	0, // [0:4] is the sub-list for field type_name
+}
+
+func init() { file_opentelemetry_proto_trace_v1_trace_config_proto_init() }
+func file_opentelemetry_proto_trace_v1_trace_config_proto_init() {
+	if File_opentelemetry_proto_trace_v1_trace_config_proto != nil {
+		return
+	}
+	if !protoimpl.UnsafeEnabled {
+		file_opentelemetry_proto_trace_v1_trace_config_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*TraceConfig); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_opentelemetry_proto_trace_v1_trace_config_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*ConstantSampler); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_opentelemetry_proto_trace_v1_trace_config_proto_msgTypes[2].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*TraceIdRatioBased); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_opentelemetry_proto_trace_v1_trace_config_proto_msgTypes[3].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*RateLimitingSampler); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+	}
+	file_opentelemetry_proto_trace_v1_trace_config_proto_msgTypes[0].OneofWrappers = []interface{}{
+		(*TraceConfig_ConstantSampler)(nil),
+		(*TraceConfig_TraceIdRatioBased)(nil),
+		(*TraceConfig_RateLimitingSampler)(nil),
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_opentelemetry_proto_trace_v1_trace_config_proto_rawDesc,
+			NumEnums:      1,
+			NumMessages:   4,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_opentelemetry_proto_trace_v1_trace_config_proto_goTypes,
+		DependencyIndexes: file_opentelemetry_proto_trace_v1_trace_config_proto_depIdxs,
+		EnumInfos:         file_opentelemetry_proto_trace_v1_trace_config_proto_enumTypes,
+		MessageInfos:      file_opentelemetry_proto_trace_v1_trace_config_proto_msgTypes,
+	}.Build()
+	File_opentelemetry_proto_trace_v1_trace_config_proto = out.File
+	file_opentelemetry_proto_trace_v1_trace_config_proto_rawDesc = nil
+	file_opentelemetry_proto_trace_v1_trace_config_proto_goTypes = nil
+	file_opentelemetry_proto_trace_v1_trace_config_proto_depIdxs = nil
+}
diff --git a/vendor/go.opentelemetry.io/proto/otlp/collector/trace/v1/trace_service.pb.go b/vendor/go.opentelemetry.io/proto/otlp/collector/trace/v1/trace_service.pb.go
new file mode 100644
index 000000000..402614f1d
--- /dev/null
+++ b/vendor/go.opentelemetry.io/proto/otlp/collector/trace/v1/trace_service.pb.go
@@ -0,0 +1,252 @@
+// Copyright 2019, OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.23.0
+// 	protoc        v3.13.0
+// source: opentelemetry/proto/collector/trace/v1/trace_service.proto
+
+package v1
+
+import (
+	proto "github.com/golang/protobuf/proto"
+	v1 "go.opentelemetry.io/proto/otlp/trace/v1"
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+// This is a compile-time assertion that a sufficiently up-to-date version
+// of the legacy proto package is being used.
+const _ = proto.ProtoPackageIsVersion4
+
+type ExportTraceServiceRequest struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// An array of ResourceSpans.
+	// For data coming from a single resource this array will typically contain one
+	// element. Intermediary nodes (such as OpenTelemetry Collector) that receive
+	// data from multiple origins typically batch the data before forwarding further and
+	// in that case this array will contain multiple elements.
+	ResourceSpans []*v1.ResourceSpans `protobuf:"bytes,1,rep,name=resource_spans,json=resourceSpans,proto3" json:"resource_spans,omitempty"`
+}
+
+func (x *ExportTraceServiceRequest) Reset() {
+	*x = ExportTraceServiceRequest{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_opentelemetry_proto_collector_trace_v1_trace_service_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *ExportTraceServiceRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*ExportTraceServiceRequest) ProtoMessage() {}
+
+func (x *ExportTraceServiceRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_opentelemetry_proto_collector_trace_v1_trace_service_proto_msgTypes[0]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use ExportTraceServiceRequest.ProtoReflect.Descriptor instead.
+func (*ExportTraceServiceRequest) Descriptor() ([]byte, []int) {
+	return file_opentelemetry_proto_collector_trace_v1_trace_service_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *ExportTraceServiceRequest) GetResourceSpans() []*v1.ResourceSpans {
+	if x != nil {
+		return x.ResourceSpans
+	}
+	return nil
+}
+
+type ExportTraceServiceResponse struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+}
+
+func (x *ExportTraceServiceResponse) Reset() {
+	*x = ExportTraceServiceResponse{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_opentelemetry_proto_collector_trace_v1_trace_service_proto_msgTypes[1]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *ExportTraceServiceResponse) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*ExportTraceServiceResponse) ProtoMessage() {}
+
+func (x *ExportTraceServiceResponse) ProtoReflect() protoreflect.Message {
+	mi := &file_opentelemetry_proto_collector_trace_v1_trace_service_proto_msgTypes[1]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use ExportTraceServiceResponse.ProtoReflect.Descriptor instead.
+func (*ExportTraceServiceResponse) Descriptor() ([]byte, []int) {
+	return file_opentelemetry_proto_collector_trace_v1_trace_service_proto_rawDescGZIP(), []int{1}
+}
+
+var File_opentelemetry_proto_collector_trace_v1_trace_service_proto protoreflect.FileDescriptor
+
+var file_opentelemetry_proto_collector_trace_v1_trace_service_proto_rawDesc = []byte{
+	0x0a, 0x3a, 0x6f, 0x70, 0x65, 0x6e, 0x74, 0x65, 0x6c, 0x65, 0x6d, 0x65, 0x74, 0x72, 0x79, 0x2f,
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+	0x74, 0x6f, 0x50, 0x01, 0x5a, 0x31, 0x67, 0x6f, 0x2e, 0x6f, 0x70, 0x65, 0x6e, 0x74, 0x65, 0x6c,
+	0x65, 0x6d, 0x65, 0x74, 0x72, 0x79, 0x2e, 0x69, 0x6f, 0x2f, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x2f,
+	0x6f, 0x74, 0x6c, 0x70, 0x2f, 0x63, 0x6f, 0x6c, 0x6c, 0x65, 0x63, 0x74, 0x6f, 0x72, 0x2f, 0x74,
+	0x72, 0x61, 0x63, 0x65, 0x2f, 0x76, 0x31, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+}
+
+var (
+	file_opentelemetry_proto_collector_trace_v1_trace_service_proto_rawDescOnce sync.Once
+	file_opentelemetry_proto_collector_trace_v1_trace_service_proto_rawDescData = file_opentelemetry_proto_collector_trace_v1_trace_service_proto_rawDesc
+)
+
+func file_opentelemetry_proto_collector_trace_v1_trace_service_proto_rawDescGZIP() []byte {
+	file_opentelemetry_proto_collector_trace_v1_trace_service_proto_rawDescOnce.Do(func() {
+		file_opentelemetry_proto_collector_trace_v1_trace_service_proto_rawDescData = protoimpl.X.CompressGZIP(file_opentelemetry_proto_collector_trace_v1_trace_service_proto_rawDescData)
+	})
+	return file_opentelemetry_proto_collector_trace_v1_trace_service_proto_rawDescData
+}
+
+var file_opentelemetry_proto_collector_trace_v1_trace_service_proto_msgTypes = make([]protoimpl.MessageInfo, 2)
+var file_opentelemetry_proto_collector_trace_v1_trace_service_proto_goTypes = []interface{}{
+	(*ExportTraceServiceRequest)(nil),  // 0: opentelemetry.proto.collector.trace.v1.ExportTraceServiceRequest
+	(*ExportTraceServiceResponse)(nil), // 1: opentelemetry.proto.collector.trace.v1.ExportTraceServiceResponse
+	(*v1.ResourceSpans)(nil),           // 2: opentelemetry.proto.trace.v1.ResourceSpans
+}
+var file_opentelemetry_proto_collector_trace_v1_trace_service_proto_depIdxs = []int32{
+	2, // 0: opentelemetry.proto.collector.trace.v1.ExportTraceServiceRequest.resource_spans:type_name -> opentelemetry.proto.trace.v1.ResourceSpans
+	0, // 1: opentelemetry.proto.collector.trace.v1.TraceService.Export:input_type -> opentelemetry.proto.collector.trace.v1.ExportTraceServiceRequest
+	1, // 2: opentelemetry.proto.collector.trace.v1.TraceService.Export:output_type -> opentelemetry.proto.collector.trace.v1.ExportTraceServiceResponse
+	2, // [2:3] is the sub-list for method output_type
+	1, // [1:2] is the sub-list for method input_type
+	1, // [1:1] is the sub-list for extension type_name
+	1, // [1:1] is the sub-list for extension extendee
+	0, // [0:1] is the sub-list for field type_name
+}
+
+func init() { file_opentelemetry_proto_collector_trace_v1_trace_service_proto_init() }
+func file_opentelemetry_proto_collector_trace_v1_trace_service_proto_init() {
+	if File_opentelemetry_proto_collector_trace_v1_trace_service_proto != nil {
+		return
+	}
+	if !protoimpl.UnsafeEnabled {
+		file_opentelemetry_proto_collector_trace_v1_trace_service_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*ExportTraceServiceRequest); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_opentelemetry_proto_collector_trace_v1_trace_service_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*ExportTraceServiceResponse); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_opentelemetry_proto_collector_trace_v1_trace_service_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   2,
+			NumExtensions: 0,
+			NumServices:   1,
+		},
+		GoTypes:           file_opentelemetry_proto_collector_trace_v1_trace_service_proto_goTypes,
+		DependencyIndexes: file_opentelemetry_proto_collector_trace_v1_trace_service_proto_depIdxs,
+		MessageInfos:      file_opentelemetry_proto_collector_trace_v1_trace_service_proto_msgTypes,
+	}.Build()
+	File_opentelemetry_proto_collector_trace_v1_trace_service_proto = out.File
+	file_opentelemetry_proto_collector_trace_v1_trace_service_proto_rawDesc = nil
+	file_opentelemetry_proto_collector_trace_v1_trace_service_proto_goTypes = nil
+	file_opentelemetry_proto_collector_trace_v1_trace_service_proto_depIdxs = nil
+}
diff --git a/vendor/go.opentelemetry.io/proto/otlp/collector/trace/v1/trace_service.pb.gw.go b/vendor/go.opentelemetry.io/proto/otlp/collector/trace/v1/trace_service.pb.gw.go
new file mode 100644
index 000000000..18dff3d03
--- /dev/null
+++ b/vendor/go.opentelemetry.io/proto/otlp/collector/trace/v1/trace_service.pb.gw.go
@@ -0,0 +1,169 @@
+// Code generated by protoc-gen-grpc-gateway. DO NOT EDIT.
+// source: opentelemetry/proto/collector/trace/v1/trace_service.proto
+
+/*
+Package v1 is a reverse proxy.
+
+It translates gRPC into RESTful JSON APIs.
+*/
+package v1
+
+import (
+	"context"
+	"io"
+	"net/http"
+
+	"github.com/golang/protobuf/descriptor"
+	"github.com/golang/protobuf/proto"
+	"github.com/grpc-ecosystem/grpc-gateway/runtime"
+	"github.com/grpc-ecosystem/grpc-gateway/utilities"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/grpclog"
+	"google.golang.org/grpc/metadata"
+	"google.golang.org/grpc/status"
+)
+
+// Suppress "imported and not used" errors
+var _ codes.Code
+var _ io.Reader
+var _ status.Status
+var _ = runtime.String
+var _ = utilities.NewDoubleArray
+var _ = descriptor.ForMessage
+var _ = metadata.Join
+
+func request_TraceService_Export_0(ctx context.Context, marshaler runtime.Marshaler, client TraceServiceClient, req *http.Request, pathParams map[string]string) (proto.Message, runtime.ServerMetadata, error) {
+	var protoReq ExportTraceServiceRequest
+	var metadata runtime.ServerMetadata
+
+	newReader, berr := utilities.IOReaderFactory(req.Body)
+	if berr != nil {
+		return nil, metadata, status.Errorf(codes.InvalidArgument, "%v", berr)
+	}
+	if err := marshaler.NewDecoder(newReader()).Decode(&protoReq); err != nil && err != io.EOF {
+		return nil, metadata, status.Errorf(codes.InvalidArgument, "%v", err)
+	}
+
+	msg, err := client.Export(ctx, &protoReq, grpc.Header(&metadata.HeaderMD), grpc.Trailer(&metadata.TrailerMD))
+	return msg, metadata, err
+
+}
+
+func local_request_TraceService_Export_0(ctx context.Context, marshaler runtime.Marshaler, server TraceServiceServer, req *http.Request, pathParams map[string]string) (proto.Message, runtime.ServerMetadata, error) {
+	var protoReq ExportTraceServiceRequest
+	var metadata runtime.ServerMetadata
+
+	newReader, berr := utilities.IOReaderFactory(req.Body)
+	if berr != nil {
+		return nil, metadata, status.Errorf(codes.InvalidArgument, "%v", berr)
+	}
+	if err := marshaler.NewDecoder(newReader()).Decode(&protoReq); err != nil && err != io.EOF {
+		return nil, metadata, status.Errorf(codes.InvalidArgument, "%v", err)
+	}
+
+	msg, err := server.Export(ctx, &protoReq)
+	return msg, metadata, err
+
+}
+
+// RegisterTraceServiceHandlerServer registers the http handlers for service TraceService to "mux".
+// UnaryRPC     :call TraceServiceServer directly.
+// StreamingRPC :currently unsupported pending https://github.com/grpc/grpc-go/issues/906.
+// Note that using this registration option will cause many gRPC library features to stop working. Consider using RegisterTraceServiceHandlerFromEndpoint instead.
+func RegisterTraceServiceHandlerServer(ctx context.Context, mux *runtime.ServeMux, server TraceServiceServer) error {
+
+	mux.Handle("POST", pattern_TraceService_Export_0, func(w http.ResponseWriter, req *http.Request, pathParams map[string]string) {
+		ctx, cancel := context.WithCancel(req.Context())
+		defer cancel()
+		var stream runtime.ServerTransportStream
+		ctx = grpc.NewContextWithServerTransportStream(ctx, &stream)
+		inboundMarshaler, outboundMarshaler := runtime.MarshalerForRequest(mux, req)
+		rctx, err := runtime.AnnotateIncomingContext(ctx, mux, req)
+		if err != nil {
+			runtime.HTTPError(ctx, mux, outboundMarshaler, w, req, err)
+			return
+		}
+		resp, md, err := local_request_TraceService_Export_0(rctx, inboundMarshaler, server, req, pathParams)
+		md.HeaderMD, md.TrailerMD = metadata.Join(md.HeaderMD, stream.Header()), metadata.Join(md.TrailerMD, stream.Trailer())
+		ctx = runtime.NewServerMetadataContext(ctx, md)
+		if err != nil {
+			runtime.HTTPError(ctx, mux, outboundMarshaler, w, req, err)
+			return
+		}
+
+		forward_TraceService_Export_0(ctx, mux, outboundMarshaler, w, req, resp, mux.GetForwardResponseOptions()...)
+
+	})
+
+	return nil
+}
+
+// RegisterTraceServiceHandlerFromEndpoint is same as RegisterTraceServiceHandler but
+// automatically dials to "endpoint" and closes the connection when "ctx" gets done.
+func RegisterTraceServiceHandlerFromEndpoint(ctx context.Context, mux *runtime.ServeMux, endpoint string, opts []grpc.DialOption) (err error) {
+	conn, err := grpc.Dial(endpoint, opts...)
+	if err != nil {
+		return err
+	}
+	defer func() {
+		if err != nil {
+			if cerr := conn.Close(); cerr != nil {
+				grpclog.Infof("Failed to close conn to %s: %v", endpoint, cerr)
+			}
+			return
+		}
+		go func() {
+			<-ctx.Done()
+			if cerr := conn.Close(); cerr != nil {
+				grpclog.Infof("Failed to close conn to %s: %v", endpoint, cerr)
+			}
+		}()
+	}()
+
+	return RegisterTraceServiceHandler(ctx, mux, conn)
+}
+
+// RegisterTraceServiceHandler registers the http handlers for service TraceService to "mux".
+// The handlers forward requests to the grpc endpoint over "conn".
+func RegisterTraceServiceHandler(ctx context.Context, mux *runtime.ServeMux, conn *grpc.ClientConn) error {
+	return RegisterTraceServiceHandlerClient(ctx, mux, NewTraceServiceClient(conn))
+}
+
+// RegisterTraceServiceHandlerClient registers the http handlers for service TraceService
+// to "mux". The handlers forward requests to the grpc endpoint over the given implementation of "TraceServiceClient".
+// Note: the gRPC framework executes interceptors within the gRPC handler. If the passed in "TraceServiceClient"
+// doesn't go through the normal gRPC flow (creating a gRPC client etc.) then it will be up to the passed in
+// "TraceServiceClient" to call the correct interceptors.
+func RegisterTraceServiceHandlerClient(ctx context.Context, mux *runtime.ServeMux, client TraceServiceClient) error {
+
+	mux.Handle("POST", pattern_TraceService_Export_0, func(w http.ResponseWriter, req *http.Request, pathParams map[string]string) {
+		ctx, cancel := context.WithCancel(req.Context())
+		defer cancel()
+		inboundMarshaler, outboundMarshaler := runtime.MarshalerForRequest(mux, req)
+		rctx, err := runtime.AnnotateContext(ctx, mux, req)
+		if err != nil {
+			runtime.HTTPError(ctx, mux, outboundMarshaler, w, req, err)
+			return
+		}
+		resp, md, err := request_TraceService_Export_0(rctx, inboundMarshaler, client, req, pathParams)
+		ctx = runtime.NewServerMetadataContext(ctx, md)
+		if err != nil {
+			runtime.HTTPError(ctx, mux, outboundMarshaler, w, req, err)
+			return
+		}
+
+		forward_TraceService_Export_0(ctx, mux, outboundMarshaler, w, req, resp, mux.GetForwardResponseOptions()...)
+
+	})
+
+	return nil
+}
+
+var (
+	pattern_TraceService_Export_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1}, []string{"v1", "trace"}, "", runtime.AssumeColonVerbOpt(true)))
+)
+
+var (
+	forward_TraceService_Export_0 = runtime.ForwardResponseMessage
+)
diff --git a/vendor/go.opentelemetry.io/proto/otlp/collector/trace/v1/trace_service_grpc.pb.go b/vendor/go.opentelemetry.io/proto/otlp/collector/trace/v1/trace_service_grpc.pb.go
new file mode 100644
index 000000000..4e4c24c0c
--- /dev/null
+++ b/vendor/go.opentelemetry.io/proto/otlp/collector/trace/v1/trace_service_grpc.pb.go
@@ -0,0 +1,101 @@
+// Code generated by protoc-gen-go-grpc. DO NOT EDIT.
+
+package v1
+
+import (
+	context "context"
+	grpc "google.golang.org/grpc"
+	codes "google.golang.org/grpc/codes"
+	status "google.golang.org/grpc/status"
+)
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the grpc package it is being compiled against.
+const _ = grpc.SupportPackageIsVersion7
+
+// TraceServiceClient is the client API for TraceService service.
+//
+// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://pkg.go.dev/google.golang.org/grpc/?tab=doc#ClientConn.NewStream.
+type TraceServiceClient interface {
+	// For performance reasons, it is recommended to keep this RPC
+	// alive for the entire life of the application.
+	Export(ctx context.Context, in *ExportTraceServiceRequest, opts ...grpc.CallOption) (*ExportTraceServiceResponse, error)
+}
+
+type traceServiceClient struct {
+	cc grpc.ClientConnInterface
+}
+
+func NewTraceServiceClient(cc grpc.ClientConnInterface) TraceServiceClient {
+	return &traceServiceClient{cc}
+}
+
+func (c *traceServiceClient) Export(ctx context.Context, in *ExportTraceServiceRequest, opts ...grpc.CallOption) (*ExportTraceServiceResponse, error) {
+	out := new(ExportTraceServiceResponse)
+	err := c.cc.Invoke(ctx, "/opentelemetry.proto.collector.trace.v1.TraceService/Export", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// TraceServiceServer is the server API for TraceService service.
+// All implementations must embed UnimplementedTraceServiceServer
+// for forward compatibility
+type TraceServiceServer interface {
+	// For performance reasons, it is recommended to keep this RPC
+	// alive for the entire life of the application.
+	Export(context.Context, *ExportTraceServiceRequest) (*ExportTraceServiceResponse, error)
+	mustEmbedUnimplementedTraceServiceServer()
+}
+
+// UnimplementedTraceServiceServer must be embedded to have forward compatible implementations.
+type UnimplementedTraceServiceServer struct {
+}
+
+func (UnimplementedTraceServiceServer) Export(context.Context, *ExportTraceServiceRequest) (*ExportTraceServiceResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method Export not implemented")
+}
+func (UnimplementedTraceServiceServer) mustEmbedUnimplementedTraceServiceServer() {}
+
+// UnsafeTraceServiceServer may be embedded to opt out of forward compatibility for this service.
+// Use of this interface is not recommended, as added methods to TraceServiceServer will
+// result in compilation errors.
+type UnsafeTraceServiceServer interface {
+	mustEmbedUnimplementedTraceServiceServer()
+}
+
+func RegisterTraceServiceServer(s grpc.ServiceRegistrar, srv TraceServiceServer) {
+	s.RegisterService(&_TraceService_serviceDesc, srv)
+}
+
+func _TraceService_Export_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(ExportTraceServiceRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(TraceServiceServer).Export(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/opentelemetry.proto.collector.trace.v1.TraceService/Export",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(TraceServiceServer).Export(ctx, req.(*ExportTraceServiceRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+var _TraceService_serviceDesc = grpc.ServiceDesc{
+	ServiceName: "opentelemetry.proto.collector.trace.v1.TraceService",
+	HandlerType: (*TraceServiceServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "Export",
+			Handler:    _TraceService_Export_Handler,
+		},
+	},
+	Streams:  []grpc.StreamDesc{},
+	Metadata: "opentelemetry/proto/collector/trace/v1/trace_service.proto",
+}
diff --git a/vendor/go.opentelemetry.io/proto/otlp/common/v1/common.pb.go b/vendor/go.opentelemetry.io/proto/otlp/common/v1/common.pb.go
new file mode 100644
index 000000000..8298228d3
--- /dev/null
+++ b/vendor/go.opentelemetry.io/proto/otlp/common/v1/common.pb.go
@@ -0,0 +1,679 @@
+// Copyright 2019, OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.23.0
+// 	protoc        v3.13.0
+// source: opentelemetry/proto/common/v1/common.proto
+
+package v1
+
+import (
+	proto "github.com/golang/protobuf/proto"
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+// This is a compile-time assertion that a sufficiently up-to-date version
+// of the legacy proto package is being used.
+const _ = proto.ProtoPackageIsVersion4
+
+// AnyValue is used to represent any type of attribute value. AnyValue may contain a
+// primitive value such as a string or integer or it may contain an arbitrary nested
+// object containing arrays, key-value lists and primitives.
+type AnyValue struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// The value is one of the listed fields. It is valid for all values to be unspecified
+	// in which case this AnyValue is considered to be "null".
+	//
+	// Types that are assignable to Value:
+	//	*AnyValue_StringValue
+	//	*AnyValue_BoolValue
+	//	*AnyValue_IntValue
+	//	*AnyValue_DoubleValue
+	//	*AnyValue_ArrayValue
+	//	*AnyValue_KvlistValue
+	//	*AnyValue_BytesValue
+	Value isAnyValue_Value `protobuf_oneof:"value"`
+}
+
+func (x *AnyValue) Reset() {
+	*x = AnyValue{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_opentelemetry_proto_common_v1_common_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *AnyValue) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*AnyValue) ProtoMessage() {}
+
+func (x *AnyValue) ProtoReflect() protoreflect.Message {
+	mi := &file_opentelemetry_proto_common_v1_common_proto_msgTypes[0]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use AnyValue.ProtoReflect.Descriptor instead.
+func (*AnyValue) Descriptor() ([]byte, []int) {
+	return file_opentelemetry_proto_common_v1_common_proto_rawDescGZIP(), []int{0}
+}
+
+func (m *AnyValue) GetValue() isAnyValue_Value {
+	if m != nil {
+		return m.Value
+	}
+	return nil
+}
+
+func (x *AnyValue) GetStringValue() string {
+	if x, ok := x.GetValue().(*AnyValue_StringValue); ok {
+		return x.StringValue
+	}
+	return ""
+}
+
+func (x *AnyValue) GetBoolValue() bool {
+	if x, ok := x.GetValue().(*AnyValue_BoolValue); ok {
+		return x.BoolValue
+	}
+	return false
+}
+
+func (x *AnyValue) GetIntValue() int64 {
+	if x, ok := x.GetValue().(*AnyValue_IntValue); ok {
+		return x.IntValue
+	}
+	return 0
+}
+
+func (x *AnyValue) GetDoubleValue() float64 {
+	if x, ok := x.GetValue().(*AnyValue_DoubleValue); ok {
+		return x.DoubleValue
+	}
+	return 0
+}
+
+func (x *AnyValue) GetArrayValue() *ArrayValue {
+	if x, ok := x.GetValue().(*AnyValue_ArrayValue); ok {
+		return x.ArrayValue
+	}
+	return nil
+}
+
+func (x *AnyValue) GetKvlistValue() *KeyValueList {
+	if x, ok := x.GetValue().(*AnyValue_KvlistValue); ok {
+		return x.KvlistValue
+	}
+	return nil
+}
+
+func (x *AnyValue) GetBytesValue() []byte {
+	if x, ok := x.GetValue().(*AnyValue_BytesValue); ok {
+		return x.BytesValue
+	}
+	return nil
+}
+
+type isAnyValue_Value interface {
+	isAnyValue_Value()
+}
+
+type AnyValue_StringValue struct {
+	StringValue string `protobuf:"bytes,1,opt,name=string_value,json=stringValue,proto3,oneof"`
+}
+
+type AnyValue_BoolValue struct {
+	BoolValue bool `protobuf:"varint,2,opt,name=bool_value,json=boolValue,proto3,oneof"`
+}
+
+type AnyValue_IntValue struct {
+	IntValue int64 `protobuf:"varint,3,opt,name=int_value,json=intValue,proto3,oneof"`
+}
+
+type AnyValue_DoubleValue struct {
+	DoubleValue float64 `protobuf:"fixed64,4,opt,name=double_value,json=doubleValue,proto3,oneof"`
+}
+
+type AnyValue_ArrayValue struct {
+	ArrayValue *ArrayValue `protobuf:"bytes,5,opt,name=array_value,json=arrayValue,proto3,oneof"`
+}
+
+type AnyValue_KvlistValue struct {
+	KvlistValue *KeyValueList `protobuf:"bytes,6,opt,name=kvlist_value,json=kvlistValue,proto3,oneof"`
+}
+
+type AnyValue_BytesValue struct {
+	BytesValue []byte `protobuf:"bytes,7,opt,name=bytes_value,json=bytesValue,proto3,oneof"`
+}
+
+func (*AnyValue_StringValue) isAnyValue_Value() {}
+
+func (*AnyValue_BoolValue) isAnyValue_Value() {}
+
+func (*AnyValue_IntValue) isAnyValue_Value() {}
+
+func (*AnyValue_DoubleValue) isAnyValue_Value() {}
+
+func (*AnyValue_ArrayValue) isAnyValue_Value() {}
+
+func (*AnyValue_KvlistValue) isAnyValue_Value() {}
+
+func (*AnyValue_BytesValue) isAnyValue_Value() {}
+
+// ArrayValue is a list of AnyValue messages. We need ArrayValue as a message
+// since oneof in AnyValue does not allow repeated fields.
+type ArrayValue struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// Array of values. The array may be empty (contain 0 elements).
+	Values []*AnyValue `protobuf:"bytes,1,rep,name=values,proto3" json:"values,omitempty"`
+}
+
+func (x *ArrayValue) Reset() {
+	*x = ArrayValue{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_opentelemetry_proto_common_v1_common_proto_msgTypes[1]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *ArrayValue) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*ArrayValue) ProtoMessage() {}
+
+func (x *ArrayValue) ProtoReflect() protoreflect.Message {
+	mi := &file_opentelemetry_proto_common_v1_common_proto_msgTypes[1]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use ArrayValue.ProtoReflect.Descriptor instead.
+func (*ArrayValue) Descriptor() ([]byte, []int) {
+	return file_opentelemetry_proto_common_v1_common_proto_rawDescGZIP(), []int{1}
+}
+
+func (x *ArrayValue) GetValues() []*AnyValue {
+	if x != nil {
+		return x.Values
+	}
+	return nil
+}
+
+// KeyValueList is a list of KeyValue messages. We need KeyValueList as a message
+// since `oneof` in AnyValue does not allow repeated fields. Everywhere else where we need
+// a list of KeyValue messages (e.g. in Span) we use `repeated KeyValue` directly to
+// avoid unnecessary extra wrapping (which slows down the protocol). The 2 approaches
+// are semantically equivalent.
+type KeyValueList struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// A collection of key/value pairs of key-value pairs. The list may be empty (may
+	// contain 0 elements).
+	Values []*KeyValue `protobuf:"bytes,1,rep,name=values,proto3" json:"values,omitempty"`
+}
+
+func (x *KeyValueList) Reset() {
+	*x = KeyValueList{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_opentelemetry_proto_common_v1_common_proto_msgTypes[2]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *KeyValueList) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*KeyValueList) ProtoMessage() {}
+
+func (x *KeyValueList) ProtoReflect() protoreflect.Message {
+	mi := &file_opentelemetry_proto_common_v1_common_proto_msgTypes[2]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use KeyValueList.ProtoReflect.Descriptor instead.
+func (*KeyValueList) Descriptor() ([]byte, []int) {
+	return file_opentelemetry_proto_common_v1_common_proto_rawDescGZIP(), []int{2}
+}
+
+func (x *KeyValueList) GetValues() []*KeyValue {
+	if x != nil {
+		return x.Values
+	}
+	return nil
+}
+
+// KeyValue is a key-value pair that is used to store Span attributes, Link
+// attributes, etc.
+type KeyValue struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Key   string    `protobuf:"bytes,1,opt,name=key,proto3" json:"key,omitempty"`
+	Value *AnyValue `protobuf:"bytes,2,opt,name=value,proto3" json:"value,omitempty"`
+}
+
+func (x *KeyValue) Reset() {
+	*x = KeyValue{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_opentelemetry_proto_common_v1_common_proto_msgTypes[3]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *KeyValue) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*KeyValue) ProtoMessage() {}
+
+func (x *KeyValue) ProtoReflect() protoreflect.Message {
+	mi := &file_opentelemetry_proto_common_v1_common_proto_msgTypes[3]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use KeyValue.ProtoReflect.Descriptor instead.
+func (*KeyValue) Descriptor() ([]byte, []int) {
+	return file_opentelemetry_proto_common_v1_common_proto_rawDescGZIP(), []int{3}
+}
+
+func (x *KeyValue) GetKey() string {
+	if x != nil {
+		return x.Key
+	}
+	return ""
+}
+
+func (x *KeyValue) GetValue() *AnyValue {
+	if x != nil {
+		return x.Value
+	}
+	return nil
+}
+
+// StringKeyValue is a pair of key/value strings. This is the simpler (and faster) version
+// of KeyValue that only supports string values.
+//
+// Deprecated: Do not use.
+type StringKeyValue struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Key   string `protobuf:"bytes,1,opt,name=key,proto3" json:"key,omitempty"`
+	Value string `protobuf:"bytes,2,opt,name=value,proto3" json:"value,omitempty"`
+}
+
+func (x *StringKeyValue) Reset() {
+	*x = StringKeyValue{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_opentelemetry_proto_common_v1_common_proto_msgTypes[4]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *StringKeyValue) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*StringKeyValue) ProtoMessage() {}
+
+func (x *StringKeyValue) ProtoReflect() protoreflect.Message {
+	mi := &file_opentelemetry_proto_common_v1_common_proto_msgTypes[4]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use StringKeyValue.ProtoReflect.Descriptor instead.
+func (*StringKeyValue) Descriptor() ([]byte, []int) {
+	return file_opentelemetry_proto_common_v1_common_proto_rawDescGZIP(), []int{4}
+}
+
+func (x *StringKeyValue) GetKey() string {
+	if x != nil {
+		return x.Key
+	}
+	return ""
+}
+
+func (x *StringKeyValue) GetValue() string {
+	if x != nil {
+		return x.Value
+	}
+	return ""
+}
+
+// InstrumentationLibrary is a message representing the instrumentation library information
+// such as the fully qualified name and version.
+type InstrumentationLibrary struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// An empty instrumentation library name means the name is unknown.
+	Name    string `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty"`
+	Version string `protobuf:"bytes,2,opt,name=version,proto3" json:"version,omitempty"`
+}
+
+func (x *InstrumentationLibrary) Reset() {
+	*x = InstrumentationLibrary{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_opentelemetry_proto_common_v1_common_proto_msgTypes[5]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *InstrumentationLibrary) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*InstrumentationLibrary) ProtoMessage() {}
+
+func (x *InstrumentationLibrary) ProtoReflect() protoreflect.Message {
+	mi := &file_opentelemetry_proto_common_v1_common_proto_msgTypes[5]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use InstrumentationLibrary.ProtoReflect.Descriptor instead.
+func (*InstrumentationLibrary) Descriptor() ([]byte, []int) {
+	return file_opentelemetry_proto_common_v1_common_proto_rawDescGZIP(), []int{5}
+}
+
+func (x *InstrumentationLibrary) GetName() string {
+	if x != nil {
+		return x.Name
+	}
+	return ""
+}
+
+func (x *InstrumentationLibrary) GetVersion() string {
+	if x != nil {
+		return x.Version
+	}
+	return ""
+}
+
+var File_opentelemetry_proto_common_v1_common_proto protoreflect.FileDescriptor
+
+var file_opentelemetry_proto_common_v1_common_proto_rawDesc = []byte{
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+	0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+}
+
+var (
+	file_opentelemetry_proto_common_v1_common_proto_rawDescOnce sync.Once
+	file_opentelemetry_proto_common_v1_common_proto_rawDescData = file_opentelemetry_proto_common_v1_common_proto_rawDesc
+)
+
+func file_opentelemetry_proto_common_v1_common_proto_rawDescGZIP() []byte {
+	file_opentelemetry_proto_common_v1_common_proto_rawDescOnce.Do(func() {
+		file_opentelemetry_proto_common_v1_common_proto_rawDescData = protoimpl.X.CompressGZIP(file_opentelemetry_proto_common_v1_common_proto_rawDescData)
+	})
+	return file_opentelemetry_proto_common_v1_common_proto_rawDescData
+}
+
+var file_opentelemetry_proto_common_v1_common_proto_msgTypes = make([]protoimpl.MessageInfo, 6)
+var file_opentelemetry_proto_common_v1_common_proto_goTypes = []interface{}{
+	(*AnyValue)(nil),               // 0: opentelemetry.proto.common.v1.AnyValue
+	(*ArrayValue)(nil),             // 1: opentelemetry.proto.common.v1.ArrayValue
+	(*KeyValueList)(nil),           // 2: opentelemetry.proto.common.v1.KeyValueList
+	(*KeyValue)(nil),               // 3: opentelemetry.proto.common.v1.KeyValue
+	(*StringKeyValue)(nil),         // 4: opentelemetry.proto.common.v1.StringKeyValue
+	(*InstrumentationLibrary)(nil), // 5: opentelemetry.proto.common.v1.InstrumentationLibrary
+}
+var file_opentelemetry_proto_common_v1_common_proto_depIdxs = []int32{
+	1, // 0: opentelemetry.proto.common.v1.AnyValue.array_value:type_name -> opentelemetry.proto.common.v1.ArrayValue
+	2, // 1: opentelemetry.proto.common.v1.AnyValue.kvlist_value:type_name -> opentelemetry.proto.common.v1.KeyValueList
+	0, // 2: opentelemetry.proto.common.v1.ArrayValue.values:type_name -> opentelemetry.proto.common.v1.AnyValue
+	3, // 3: opentelemetry.proto.common.v1.KeyValueList.values:type_name -> opentelemetry.proto.common.v1.KeyValue
+	0, // 4: opentelemetry.proto.common.v1.KeyValue.value:type_name -> opentelemetry.proto.common.v1.AnyValue
+	5, // [5:5] is the sub-list for method output_type
+	5, // [5:5] is the sub-list for method input_type
+	5, // [5:5] is the sub-list for extension type_name
+	5, // [5:5] is the sub-list for extension extendee
+	0, // [0:5] is the sub-list for field type_name
+}
+
+func init() { file_opentelemetry_proto_common_v1_common_proto_init() }
+func file_opentelemetry_proto_common_v1_common_proto_init() {
+	if File_opentelemetry_proto_common_v1_common_proto != nil {
+		return
+	}
+	if !protoimpl.UnsafeEnabled {
+		file_opentelemetry_proto_common_v1_common_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*AnyValue); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_opentelemetry_proto_common_v1_common_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*ArrayValue); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_opentelemetry_proto_common_v1_common_proto_msgTypes[2].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*KeyValueList); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_opentelemetry_proto_common_v1_common_proto_msgTypes[3].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*KeyValue); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_opentelemetry_proto_common_v1_common_proto_msgTypes[4].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*StringKeyValue); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_opentelemetry_proto_common_v1_common_proto_msgTypes[5].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*InstrumentationLibrary); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+	}
+	file_opentelemetry_proto_common_v1_common_proto_msgTypes[0].OneofWrappers = []interface{}{
+		(*AnyValue_StringValue)(nil),
+		(*AnyValue_BoolValue)(nil),
+		(*AnyValue_IntValue)(nil),
+		(*AnyValue_DoubleValue)(nil),
+		(*AnyValue_ArrayValue)(nil),
+		(*AnyValue_KvlistValue)(nil),
+		(*AnyValue_BytesValue)(nil),
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_opentelemetry_proto_common_v1_common_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   6,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_opentelemetry_proto_common_v1_common_proto_goTypes,
+		DependencyIndexes: file_opentelemetry_proto_common_v1_common_proto_depIdxs,
+		MessageInfos:      file_opentelemetry_proto_common_v1_common_proto_msgTypes,
+	}.Build()
+	File_opentelemetry_proto_common_v1_common_proto = out.File
+	file_opentelemetry_proto_common_v1_common_proto_rawDesc = nil
+	file_opentelemetry_proto_common_v1_common_proto_goTypes = nil
+	file_opentelemetry_proto_common_v1_common_proto_depIdxs = nil
+}
diff --git a/vendor/go.opentelemetry.io/proto/otlp/resource/v1/resource.pb.go b/vendor/go.opentelemetry.io/proto/otlp/resource/v1/resource.pb.go
new file mode 100644
index 000000000..ac347acb2
--- /dev/null
+++ b/vendor/go.opentelemetry.io/proto/otlp/resource/v1/resource.pb.go
@@ -0,0 +1,194 @@
+// Copyright 2019, OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.23.0
+// 	protoc        v3.13.0
+// source: opentelemetry/proto/resource/v1/resource.proto
+
+package v1
+
+import (
+	proto "github.com/golang/protobuf/proto"
+	v1 "go.opentelemetry.io/proto/otlp/common/v1"
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+// This is a compile-time assertion that a sufficiently up-to-date version
+// of the legacy proto package is being used.
+const _ = proto.ProtoPackageIsVersion4
+
+// Resource information.
+type Resource struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// Set of labels that describe the resource.
+	Attributes []*v1.KeyValue `protobuf:"bytes,1,rep,name=attributes,proto3" json:"attributes,omitempty"`
+	// dropped_attributes_count is the number of dropped attributes. If the value is 0, then
+	// no attributes were dropped.
+	DroppedAttributesCount uint32 `protobuf:"varint,2,opt,name=dropped_attributes_count,json=droppedAttributesCount,proto3" json:"dropped_attributes_count,omitempty"`
+}
+
+func (x *Resource) Reset() {
+	*x = Resource{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_opentelemetry_proto_resource_v1_resource_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *Resource) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Resource) ProtoMessage() {}
+
+func (x *Resource) ProtoReflect() protoreflect.Message {
+	mi := &file_opentelemetry_proto_resource_v1_resource_proto_msgTypes[0]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Resource.ProtoReflect.Descriptor instead.
+func (*Resource) Descriptor() ([]byte, []int) {
+	return file_opentelemetry_proto_resource_v1_resource_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *Resource) GetAttributes() []*v1.KeyValue {
+	if x != nil {
+		return x.Attributes
+	}
+	return nil
+}
+
+func (x *Resource) GetDroppedAttributesCount() uint32 {
+	if x != nil {
+		return x.DroppedAttributesCount
+	}
+	return 0
+}
+
+var File_opentelemetry_proto_resource_v1_resource_proto protoreflect.FileDescriptor
+
+var file_opentelemetry_proto_resource_v1_resource_proto_rawDesc = []byte{
+	0x0a, 0x2e, 0x6f, 0x70, 0x65, 0x6e, 0x74, 0x65, 0x6c, 0x65, 0x6d, 0x65, 0x74, 0x72, 0x79, 0x2f,
+	0x70, 0x72, 0x6f, 0x74, 0x6f, 0x2f, 0x72, 0x65, 0x73, 0x6f, 0x75, 0x72, 0x63, 0x65, 0x2f, 0x76,
+	0x31, 0x2f, 0x72, 0x65, 0x73, 0x6f, 0x75, 0x72, 0x63, 0x65, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f,
+	0x12, 0x1f, 0x6f, 0x70, 0x65, 0x6e, 0x74, 0x65, 0x6c, 0x65, 0x6d, 0x65, 0x74, 0x72, 0x79, 0x2e,
+	0x70, 0x72, 0x6f, 0x74, 0x6f, 0x2e, 0x72, 0x65, 0x73, 0x6f, 0x75, 0x72, 0x63, 0x65, 0x2e, 0x76,
+	0x31, 0x1a, 0x2a, 0x6f, 0x70, 0x65, 0x6e, 0x74, 0x65, 0x6c, 0x65, 0x6d, 0x65, 0x74, 0x72, 0x79,
+	0x2f, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x2f, 0x63, 0x6f, 0x6d, 0x6d, 0x6f, 0x6e, 0x2f, 0x76, 0x31,
+	0x2f, 0x63, 0x6f, 0x6d, 0x6d, 0x6f, 0x6e, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x22, 0x8d, 0x01,
+	0x0a, 0x08, 0x52, 0x65, 0x73, 0x6f, 0x75, 0x72, 0x63, 0x65, 0x12, 0x47, 0x0a, 0x0a, 0x61, 0x74,
+	0x74, 0x72, 0x69, 0x62, 0x75, 0x74, 0x65, 0x73, 0x18, 0x01, 0x20, 0x03, 0x28, 0x0b, 0x32, 0x27,
+	0x2e, 0x6f, 0x70, 0x65, 0x6e, 0x74, 0x65, 0x6c, 0x65, 0x6d, 0x65, 0x74, 0x72, 0x79, 0x2e, 0x70,
+	0x72, 0x6f, 0x74, 0x6f, 0x2e, 0x63, 0x6f, 0x6d, 0x6d, 0x6f, 0x6e, 0x2e, 0x76, 0x31, 0x2e, 0x4b,
+	0x65, 0x79, 0x56, 0x61, 0x6c, 0x75, 0x65, 0x52, 0x0a, 0x61, 0x74, 0x74, 0x72, 0x69, 0x62, 0x75,
+	0x74, 0x65, 0x73, 0x12, 0x38, 0x0a, 0x18, 0x64, 0x72, 0x6f, 0x70, 0x70, 0x65, 0x64, 0x5f, 0x61,
+	0x74, 0x74, 0x72, 0x69, 0x62, 0x75, 0x74, 0x65, 0x73, 0x5f, 0x63, 0x6f, 0x75, 0x6e, 0x74, 0x18,
+	0x02, 0x20, 0x01, 0x28, 0x0d, 0x52, 0x16, 0x64, 0x72, 0x6f, 0x70, 0x70, 0x65, 0x64, 0x41, 0x74,
+	0x74, 0x72, 0x69, 0x62, 0x75, 0x74, 0x65, 0x73, 0x43, 0x6f, 0x75, 0x6e, 0x74, 0x42, 0x61, 0x0a,
+	0x22, 0x69, 0x6f, 0x2e, 0x6f, 0x70, 0x65, 0x6e, 0x74, 0x65, 0x6c, 0x65, 0x6d, 0x65, 0x74, 0x72,
+	0x79, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x2e, 0x72, 0x65, 0x73, 0x6f, 0x75, 0x72, 0x63, 0x65,
+	0x2e, 0x76, 0x31, 0x42, 0x0d, 0x52, 0x65, 0x73, 0x6f, 0x75, 0x72, 0x63, 0x65, 0x50, 0x72, 0x6f,
+	0x74, 0x6f, 0x50, 0x01, 0x5a, 0x2a, 0x67, 0x6f, 0x2e, 0x6f, 0x70, 0x65, 0x6e, 0x74, 0x65, 0x6c,
+	0x65, 0x6d, 0x65, 0x74, 0x72, 0x79, 0x2e, 0x69, 0x6f, 0x2f, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x2f,
+	0x6f, 0x74, 0x6c, 0x70, 0x2f, 0x72, 0x65, 0x73, 0x6f, 0x75, 0x72, 0x63, 0x65, 0x2f, 0x76, 0x31,
+	0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+}
+
+var (
+	file_opentelemetry_proto_resource_v1_resource_proto_rawDescOnce sync.Once
+	file_opentelemetry_proto_resource_v1_resource_proto_rawDescData = file_opentelemetry_proto_resource_v1_resource_proto_rawDesc
+)
+
+func file_opentelemetry_proto_resource_v1_resource_proto_rawDescGZIP() []byte {
+	file_opentelemetry_proto_resource_v1_resource_proto_rawDescOnce.Do(func() {
+		file_opentelemetry_proto_resource_v1_resource_proto_rawDescData = protoimpl.X.CompressGZIP(file_opentelemetry_proto_resource_v1_resource_proto_rawDescData)
+	})
+	return file_opentelemetry_proto_resource_v1_resource_proto_rawDescData
+}
+
+var file_opentelemetry_proto_resource_v1_resource_proto_msgTypes = make([]protoimpl.MessageInfo, 1)
+var file_opentelemetry_proto_resource_v1_resource_proto_goTypes = []interface{}{
+	(*Resource)(nil),    // 0: opentelemetry.proto.resource.v1.Resource
+	(*v1.KeyValue)(nil), // 1: opentelemetry.proto.common.v1.KeyValue
+}
+var file_opentelemetry_proto_resource_v1_resource_proto_depIdxs = []int32{
+	1, // 0: opentelemetry.proto.resource.v1.Resource.attributes:type_name -> opentelemetry.proto.common.v1.KeyValue
+	1, // [1:1] is the sub-list for method output_type
+	1, // [1:1] is the sub-list for method input_type
+	1, // [1:1] is the sub-list for extension type_name
+	1, // [1:1] is the sub-list for extension extendee
+	0, // [0:1] is the sub-list for field type_name
+}
+
+func init() { file_opentelemetry_proto_resource_v1_resource_proto_init() }
+func file_opentelemetry_proto_resource_v1_resource_proto_init() {
+	if File_opentelemetry_proto_resource_v1_resource_proto != nil {
+		return
+	}
+	if !protoimpl.UnsafeEnabled {
+		file_opentelemetry_proto_resource_v1_resource_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*Resource); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_opentelemetry_proto_resource_v1_resource_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   1,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_opentelemetry_proto_resource_v1_resource_proto_goTypes,
+		DependencyIndexes: file_opentelemetry_proto_resource_v1_resource_proto_depIdxs,
+		MessageInfos:      file_opentelemetry_proto_resource_v1_resource_proto_msgTypes,
+	}.Build()
+	File_opentelemetry_proto_resource_v1_resource_proto = out.File
+	file_opentelemetry_proto_resource_v1_resource_proto_rawDesc = nil
+	file_opentelemetry_proto_resource_v1_resource_proto_goTypes = nil
+	file_opentelemetry_proto_resource_v1_resource_proto_depIdxs = nil
+}
diff --git a/vendor/go.opentelemetry.io/proto/otlp/trace/v1/trace.pb.go b/vendor/go.opentelemetry.io/proto/otlp/trace/v1/trace.pb.go
new file mode 100644
index 000000000..3bfd4f862
--- /dev/null
+++ b/vendor/go.opentelemetry.io/proto/otlp/trace/v1/trace.pb.go
@@ -0,0 +1,1230 @@
+// Copyright 2019, OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.23.0
+// 	protoc        v3.13.0
+// source: opentelemetry/proto/trace/v1/trace.proto
+
+package v1
+
+import (
+	proto "github.com/golang/protobuf/proto"
+	v11 "go.opentelemetry.io/proto/otlp/common/v1"
+	v1 "go.opentelemetry.io/proto/otlp/resource/v1"
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+// This is a compile-time assertion that a sufficiently up-to-date version
+// of the legacy proto package is being used.
+const _ = proto.ProtoPackageIsVersion4
+
+// SpanKind is the type of span. Can be used to specify additional relationships between spans
+// in addition to a parent/child relationship.
+type Span_SpanKind int32
+
+const (
+	// Unspecified. Do NOT use as default.
+	// Implementations MAY assume SpanKind to be INTERNAL when receiving UNSPECIFIED.
+	Span_SPAN_KIND_UNSPECIFIED Span_SpanKind = 0
+	// Indicates that the span represents an internal operation within an application,
+	// as opposed to an operation happening at the boundaries. Default value.
+	Span_SPAN_KIND_INTERNAL Span_SpanKind = 1
+	// Indicates that the span covers server-side handling of an RPC or other
+	// remote network request.
+	Span_SPAN_KIND_SERVER Span_SpanKind = 2
+	// Indicates that the span describes a request to some remote service.
+	Span_SPAN_KIND_CLIENT Span_SpanKind = 3
+	// Indicates that the span describes a producer sending a message to a broker.
+	// Unlike CLIENT and SERVER, there is often no direct critical path latency relationship
+	// between producer and consumer spans. A PRODUCER span ends when the message was accepted
+	// by the broker while the logical processing of the message might span a much longer time.
+	Span_SPAN_KIND_PRODUCER Span_SpanKind = 4
+	// Indicates that the span describes consumer receiving a message from a broker.
+	// Like the PRODUCER kind, there is often no direct critical path latency relationship
+	// between producer and consumer spans.
+	Span_SPAN_KIND_CONSUMER Span_SpanKind = 5
+)
+
+// Enum value maps for Span_SpanKind.
+var (
+	Span_SpanKind_name = map[int32]string{
+		0: "SPAN_KIND_UNSPECIFIED",
+		1: "SPAN_KIND_INTERNAL",
+		2: "SPAN_KIND_SERVER",
+		3: "SPAN_KIND_CLIENT",
+		4: "SPAN_KIND_PRODUCER",
+		5: "SPAN_KIND_CONSUMER",
+	}
+	Span_SpanKind_value = map[string]int32{
+		"SPAN_KIND_UNSPECIFIED": 0,
+		"SPAN_KIND_INTERNAL":    1,
+		"SPAN_KIND_SERVER":      2,
+		"SPAN_KIND_CLIENT":      3,
+		"SPAN_KIND_PRODUCER":    4,
+		"SPAN_KIND_CONSUMER":    5,
+	}
+)
+
+func (x Span_SpanKind) Enum() *Span_SpanKind {
+	p := new(Span_SpanKind)
+	*p = x
+	return p
+}
+
+func (x Span_SpanKind) String() string {
+	return protoimpl.X.EnumStringOf(x.Descriptor(), protoreflect.EnumNumber(x))
+}
+
+func (Span_SpanKind) Descriptor() protoreflect.EnumDescriptor {
+	return file_opentelemetry_proto_trace_v1_trace_proto_enumTypes[0].Descriptor()
+}
+
+func (Span_SpanKind) Type() protoreflect.EnumType {
+	return &file_opentelemetry_proto_trace_v1_trace_proto_enumTypes[0]
+}
+
+func (x Span_SpanKind) Number() protoreflect.EnumNumber {
+	return protoreflect.EnumNumber(x)
+}
+
+// Deprecated: Use Span_SpanKind.Descriptor instead.
+func (Span_SpanKind) EnumDescriptor() ([]byte, []int) {
+	return file_opentelemetry_proto_trace_v1_trace_proto_rawDescGZIP(), []int{2, 0}
+}
+
+type Status_DeprecatedStatusCode int32
+
+const (
+	Status_DEPRECATED_STATUS_CODE_OK                  Status_DeprecatedStatusCode = 0
+	Status_DEPRECATED_STATUS_CODE_CANCELLED           Status_DeprecatedStatusCode = 1
+	Status_DEPRECATED_STATUS_CODE_UNKNOWN_ERROR       Status_DeprecatedStatusCode = 2
+	Status_DEPRECATED_STATUS_CODE_INVALID_ARGUMENT    Status_DeprecatedStatusCode = 3
+	Status_DEPRECATED_STATUS_CODE_DEADLINE_EXCEEDED   Status_DeprecatedStatusCode = 4
+	Status_DEPRECATED_STATUS_CODE_NOT_FOUND           Status_DeprecatedStatusCode = 5
+	Status_DEPRECATED_STATUS_CODE_ALREADY_EXISTS      Status_DeprecatedStatusCode = 6
+	Status_DEPRECATED_STATUS_CODE_PERMISSION_DENIED   Status_DeprecatedStatusCode = 7
+	Status_DEPRECATED_STATUS_CODE_RESOURCE_EXHAUSTED  Status_DeprecatedStatusCode = 8
+	Status_DEPRECATED_STATUS_CODE_FAILED_PRECONDITION Status_DeprecatedStatusCode = 9
+	Status_DEPRECATED_STATUS_CODE_ABORTED             Status_DeprecatedStatusCode = 10
+	Status_DEPRECATED_STATUS_CODE_OUT_OF_RANGE        Status_DeprecatedStatusCode = 11
+	Status_DEPRECATED_STATUS_CODE_UNIMPLEMENTED       Status_DeprecatedStatusCode = 12
+	Status_DEPRECATED_STATUS_CODE_INTERNAL_ERROR      Status_DeprecatedStatusCode = 13
+	Status_DEPRECATED_STATUS_CODE_UNAVAILABLE         Status_DeprecatedStatusCode = 14
+	Status_DEPRECATED_STATUS_CODE_DATA_LOSS           Status_DeprecatedStatusCode = 15
+	Status_DEPRECATED_STATUS_CODE_UNAUTHENTICATED     Status_DeprecatedStatusCode = 16
+)
+
+// Enum value maps for Status_DeprecatedStatusCode.
+var (
+	Status_DeprecatedStatusCode_name = map[int32]string{
+		0:  "DEPRECATED_STATUS_CODE_OK",
+		1:  "DEPRECATED_STATUS_CODE_CANCELLED",
+		2:  "DEPRECATED_STATUS_CODE_UNKNOWN_ERROR",
+		3:  "DEPRECATED_STATUS_CODE_INVALID_ARGUMENT",
+		4:  "DEPRECATED_STATUS_CODE_DEADLINE_EXCEEDED",
+		5:  "DEPRECATED_STATUS_CODE_NOT_FOUND",
+		6:  "DEPRECATED_STATUS_CODE_ALREADY_EXISTS",
+		7:  "DEPRECATED_STATUS_CODE_PERMISSION_DENIED",
+		8:  "DEPRECATED_STATUS_CODE_RESOURCE_EXHAUSTED",
+		9:  "DEPRECATED_STATUS_CODE_FAILED_PRECONDITION",
+		10: "DEPRECATED_STATUS_CODE_ABORTED",
+		11: "DEPRECATED_STATUS_CODE_OUT_OF_RANGE",
+		12: "DEPRECATED_STATUS_CODE_UNIMPLEMENTED",
+		13: "DEPRECATED_STATUS_CODE_INTERNAL_ERROR",
+		14: "DEPRECATED_STATUS_CODE_UNAVAILABLE",
+		15: "DEPRECATED_STATUS_CODE_DATA_LOSS",
+		16: "DEPRECATED_STATUS_CODE_UNAUTHENTICATED",
+	}
+	Status_DeprecatedStatusCode_value = map[string]int32{
+		"DEPRECATED_STATUS_CODE_OK":                  0,
+		"DEPRECATED_STATUS_CODE_CANCELLED":           1,
+		"DEPRECATED_STATUS_CODE_UNKNOWN_ERROR":       2,
+		"DEPRECATED_STATUS_CODE_INVALID_ARGUMENT":    3,
+		"DEPRECATED_STATUS_CODE_DEADLINE_EXCEEDED":   4,
+		"DEPRECATED_STATUS_CODE_NOT_FOUND":           5,
+		"DEPRECATED_STATUS_CODE_ALREADY_EXISTS":      6,
+		"DEPRECATED_STATUS_CODE_PERMISSION_DENIED":   7,
+		"DEPRECATED_STATUS_CODE_RESOURCE_EXHAUSTED":  8,
+		"DEPRECATED_STATUS_CODE_FAILED_PRECONDITION": 9,
+		"DEPRECATED_STATUS_CODE_ABORTED":             10,
+		"DEPRECATED_STATUS_CODE_OUT_OF_RANGE":        11,
+		"DEPRECATED_STATUS_CODE_UNIMPLEMENTED":       12,
+		"DEPRECATED_STATUS_CODE_INTERNAL_ERROR":      13,
+		"DEPRECATED_STATUS_CODE_UNAVAILABLE":         14,
+		"DEPRECATED_STATUS_CODE_DATA_LOSS":           15,
+		"DEPRECATED_STATUS_CODE_UNAUTHENTICATED":     16,
+	}
+)
+
+func (x Status_DeprecatedStatusCode) Enum() *Status_DeprecatedStatusCode {
+	p := new(Status_DeprecatedStatusCode)
+	*p = x
+	return p
+}
+
+func (x Status_DeprecatedStatusCode) String() string {
+	return protoimpl.X.EnumStringOf(x.Descriptor(), protoreflect.EnumNumber(x))
+}
+
+func (Status_DeprecatedStatusCode) Descriptor() protoreflect.EnumDescriptor {
+	return file_opentelemetry_proto_trace_v1_trace_proto_enumTypes[1].Descriptor()
+}
+
+func (Status_DeprecatedStatusCode) Type() protoreflect.EnumType {
+	return &file_opentelemetry_proto_trace_v1_trace_proto_enumTypes[1]
+}
+
+func (x Status_DeprecatedStatusCode) Number() protoreflect.EnumNumber {
+	return protoreflect.EnumNumber(x)
+}
+
+// Deprecated: Use Status_DeprecatedStatusCode.Descriptor instead.
+func (Status_DeprecatedStatusCode) EnumDescriptor() ([]byte, []int) {
+	return file_opentelemetry_proto_trace_v1_trace_proto_rawDescGZIP(), []int{3, 0}
+}
+
+// For the semantics of status codes see
+// https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/trace/api.md#set-status
+type Status_StatusCode int32
+
+const (
+	// The default status.
+	Status_STATUS_CODE_UNSET Status_StatusCode = 0
+	// The Span has been validated by an Application developers or Operator to have
+	// completed successfully.
+	Status_STATUS_CODE_OK Status_StatusCode = 1
+	// The Span contains an error.
+	Status_STATUS_CODE_ERROR Status_StatusCode = 2
+)
+
+// Enum value maps for Status_StatusCode.
+var (
+	Status_StatusCode_name = map[int32]string{
+		0: "STATUS_CODE_UNSET",
+		1: "STATUS_CODE_OK",
+		2: "STATUS_CODE_ERROR",
+	}
+	Status_StatusCode_value = map[string]int32{
+		"STATUS_CODE_UNSET": 0,
+		"STATUS_CODE_OK":    1,
+		"STATUS_CODE_ERROR": 2,
+	}
+)
+
+func (x Status_StatusCode) Enum() *Status_StatusCode {
+	p := new(Status_StatusCode)
+	*p = x
+	return p
+}
+
+func (x Status_StatusCode) String() string {
+	return protoimpl.X.EnumStringOf(x.Descriptor(), protoreflect.EnumNumber(x))
+}
+
+func (Status_StatusCode) Descriptor() protoreflect.EnumDescriptor {
+	return file_opentelemetry_proto_trace_v1_trace_proto_enumTypes[2].Descriptor()
+}
+
+func (Status_StatusCode) Type() protoreflect.EnumType {
+	return &file_opentelemetry_proto_trace_v1_trace_proto_enumTypes[2]
+}
+
+func (x Status_StatusCode) Number() protoreflect.EnumNumber {
+	return protoreflect.EnumNumber(x)
+}
+
+// Deprecated: Use Status_StatusCode.Descriptor instead.
+func (Status_StatusCode) EnumDescriptor() ([]byte, []int) {
+	return file_opentelemetry_proto_trace_v1_trace_proto_rawDescGZIP(), []int{3, 1}
+}
+
+// A collection of InstrumentationLibrarySpans from a Resource.
+type ResourceSpans struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// The resource for the spans in this message.
+	// If this field is not set then no resource info is known.
+	Resource *v1.Resource `protobuf:"bytes,1,opt,name=resource,proto3" json:"resource,omitempty"`
+	// A list of InstrumentationLibrarySpans that originate from a resource.
+	InstrumentationLibrarySpans []*InstrumentationLibrarySpans `protobuf:"bytes,2,rep,name=instrumentation_library_spans,json=instrumentationLibrarySpans,proto3" json:"instrumentation_library_spans,omitempty"`
+	// This schema_url applies to the data in the "resource" field. It does not apply
+	// to the data in the "instrumentation_library_spans" field which have their own
+	// schema_url field.
+	SchemaUrl string `protobuf:"bytes,3,opt,name=schema_url,json=schemaUrl,proto3" json:"schema_url,omitempty"`
+}
+
+func (x *ResourceSpans) Reset() {
+	*x = ResourceSpans{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_opentelemetry_proto_trace_v1_trace_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *ResourceSpans) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*ResourceSpans) ProtoMessage() {}
+
+func (x *ResourceSpans) ProtoReflect() protoreflect.Message {
+	mi := &file_opentelemetry_proto_trace_v1_trace_proto_msgTypes[0]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use ResourceSpans.ProtoReflect.Descriptor instead.
+func (*ResourceSpans) Descriptor() ([]byte, []int) {
+	return file_opentelemetry_proto_trace_v1_trace_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *ResourceSpans) GetResource() *v1.Resource {
+	if x != nil {
+		return x.Resource
+	}
+	return nil
+}
+
+func (x *ResourceSpans) GetInstrumentationLibrarySpans() []*InstrumentationLibrarySpans {
+	if x != nil {
+		return x.InstrumentationLibrarySpans
+	}
+	return nil
+}
+
+func (x *ResourceSpans) GetSchemaUrl() string {
+	if x != nil {
+		return x.SchemaUrl
+	}
+	return ""
+}
+
+// A collection of Spans produced by an InstrumentationLibrary.
+type InstrumentationLibrarySpans struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// The instrumentation library information for the spans in this message.
+	// Semantically when InstrumentationLibrary isn't set, it is equivalent with
+	// an empty instrumentation library name (unknown).
+	InstrumentationLibrary *v11.InstrumentationLibrary `protobuf:"bytes,1,opt,name=instrumentation_library,json=instrumentationLibrary,proto3" json:"instrumentation_library,omitempty"`
+	// A list of Spans that originate from an instrumentation library.
+	Spans []*Span `protobuf:"bytes,2,rep,name=spans,proto3" json:"spans,omitempty"`
+	// This schema_url applies to all spans and span events in the "spans" field.
+	SchemaUrl string `protobuf:"bytes,3,opt,name=schema_url,json=schemaUrl,proto3" json:"schema_url,omitempty"`
+}
+
+func (x *InstrumentationLibrarySpans) Reset() {
+	*x = InstrumentationLibrarySpans{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_opentelemetry_proto_trace_v1_trace_proto_msgTypes[1]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *InstrumentationLibrarySpans) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*InstrumentationLibrarySpans) ProtoMessage() {}
+
+func (x *InstrumentationLibrarySpans) ProtoReflect() protoreflect.Message {
+	mi := &file_opentelemetry_proto_trace_v1_trace_proto_msgTypes[1]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use InstrumentationLibrarySpans.ProtoReflect.Descriptor instead.
+func (*InstrumentationLibrarySpans) Descriptor() ([]byte, []int) {
+	return file_opentelemetry_proto_trace_v1_trace_proto_rawDescGZIP(), []int{1}
+}
+
+func (x *InstrumentationLibrarySpans) GetInstrumentationLibrary() *v11.InstrumentationLibrary {
+	if x != nil {
+		return x.InstrumentationLibrary
+	}
+	return nil
+}
+
+func (x *InstrumentationLibrarySpans) GetSpans() []*Span {
+	if x != nil {
+		return x.Spans
+	}
+	return nil
+}
+
+func (x *InstrumentationLibrarySpans) GetSchemaUrl() string {
+	if x != nil {
+		return x.SchemaUrl
+	}
+	return ""
+}
+
+// Span represents a single operation within a trace. Spans can be
+// nested to form a trace tree. Spans may also be linked to other spans
+// from the same or different trace and form graphs. Often, a trace
+// contains a root span that describes the end-to-end latency, and one
+// or more subspans for its sub-operations. A trace can also contain
+// multiple root spans, or none at all. Spans do not need to be
+// contiguous - there may be gaps or overlaps between spans in a trace.
+//
+// The next available field id is 17.
+type Span struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// A unique identifier for a trace. All spans from the same trace share
+	// the same `trace_id`. The ID is a 16-byte array. An ID with all zeroes
+	// is considered invalid.
+	//
+	// This field is semantically required. Receiver should generate new
+	// random trace_id if empty or invalid trace_id was received.
+	//
+	// This field is required.
+	TraceId []byte `protobuf:"bytes,1,opt,name=trace_id,json=traceId,proto3" json:"trace_id,omitempty"`
+	// A unique identifier for a span within a trace, assigned when the span
+	// is created. The ID is an 8-byte array. An ID with all zeroes is considered
+	// invalid.
+	//
+	// This field is semantically required. Receiver should generate new
+	// random span_id if empty or invalid span_id was received.
+	//
+	// This field is required.
+	SpanId []byte `protobuf:"bytes,2,opt,name=span_id,json=spanId,proto3" json:"span_id,omitempty"`
+	// trace_state conveys information about request position in multiple distributed tracing graphs.
+	// It is a trace_state in w3c-trace-context format: https://www.w3.org/TR/trace-context/#tracestate-header
+	// See also https://github.com/w3c/distributed-tracing for more details about this field.
+	TraceState string `protobuf:"bytes,3,opt,name=trace_state,json=traceState,proto3" json:"trace_state,omitempty"`
+	// The `span_id` of this span's parent span. If this is a root span, then this
+	// field must be empty. The ID is an 8-byte array.
+	ParentSpanId []byte `protobuf:"bytes,4,opt,name=parent_span_id,json=parentSpanId,proto3" json:"parent_span_id,omitempty"`
+	// A description of the span's operation.
+	//
+	// For example, the name can be a qualified method name or a file name
+	// and a line number where the operation is called. A best practice is to use
+	// the same display name at the same call point in an application.
+	// This makes it easier to correlate spans in different traces.
+	//
+	// This field is semantically required to be set to non-empty string.
+	// When null or empty string received - receiver may use string "name"
+	// as a replacement. There might be smarted algorithms implemented by
+	// receiver to fix the empty span name.
+	//
+	// This field is required.
+	Name string `protobuf:"bytes,5,opt,name=name,proto3" json:"name,omitempty"`
+	// Distinguishes between spans generated in a particular context. For example,
+	// two spans with the same name may be distinguished using `CLIENT` (caller)
+	// and `SERVER` (callee) to identify queueing latency associated with the span.
+	Kind Span_SpanKind `protobuf:"varint,6,opt,name=kind,proto3,enum=opentelemetry.proto.trace.v1.Span_SpanKind" json:"kind,omitempty"`
+	// start_time_unix_nano is the start time of the span. On the client side, this is the time
+	// kept by the local machine where the span execution starts. On the server side, this
+	// is the time when the server's application handler starts running.
+	// Value is UNIX Epoch time in nanoseconds since 00:00:00 UTC on 1 January 1970.
+	//
+	// This field is semantically required and it is expected that end_time >= start_time.
+	StartTimeUnixNano uint64 `protobuf:"fixed64,7,opt,name=start_time_unix_nano,json=startTimeUnixNano,proto3" json:"start_time_unix_nano,omitempty"`
+	// end_time_unix_nano is the end time of the span. On the client side, this is the time
+	// kept by the local machine where the span execution ends. On the server side, this
+	// is the time when the server application handler stops running.
+	// Value is UNIX Epoch time in nanoseconds since 00:00:00 UTC on 1 January 1970.
+	//
+	// This field is semantically required and it is expected that end_time >= start_time.
+	EndTimeUnixNano uint64 `protobuf:"fixed64,8,opt,name=end_time_unix_nano,json=endTimeUnixNano,proto3" json:"end_time_unix_nano,omitempty"`
+	// attributes is a collection of key/value pairs. The value can be a string,
+	// an integer, a double or the Boolean values `true` or `false`. Note, global attributes
+	// like server name can be set using the resource API. Examples of attributes:
+	//
+	//     "/http/user_agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.98 Safari/537.36"
+	//     "/http/server_latency": 300
+	//     "abc.com/myattribute": true
+	//     "abc.com/score": 10.239
+	Attributes []*v11.KeyValue `protobuf:"bytes,9,rep,name=attributes,proto3" json:"attributes,omitempty"`
+	// dropped_attributes_count is the number of attributes that were discarded. Attributes
+	// can be discarded because their keys are too long or because there are too many
+	// attributes. If this value is 0, then no attributes were dropped.
+	DroppedAttributesCount uint32 `protobuf:"varint,10,opt,name=dropped_attributes_count,json=droppedAttributesCount,proto3" json:"dropped_attributes_count,omitempty"`
+	// events is a collection of Event items.
+	Events []*Span_Event `protobuf:"bytes,11,rep,name=events,proto3" json:"events,omitempty"`
+	// dropped_events_count is the number of dropped events. If the value is 0, then no
+	// events were dropped.
+	DroppedEventsCount uint32 `protobuf:"varint,12,opt,name=dropped_events_count,json=droppedEventsCount,proto3" json:"dropped_events_count,omitempty"`
+	// links is a collection of Links, which are references from this span to a span
+	// in the same or different trace.
+	Links []*Span_Link `protobuf:"bytes,13,rep,name=links,proto3" json:"links,omitempty"`
+	// dropped_links_count is the number of dropped links after the maximum size was
+	// enforced. If this value is 0, then no links were dropped.
+	DroppedLinksCount uint32 `protobuf:"varint,14,opt,name=dropped_links_count,json=droppedLinksCount,proto3" json:"dropped_links_count,omitempty"`
+	// An optional final status for this span. Semantically when Status isn't set, it means
+	// span's status code is unset, i.e. assume STATUS_CODE_UNSET (code = 0).
+	Status *Status `protobuf:"bytes,15,opt,name=status,proto3" json:"status,omitempty"`
+}
+
+func (x *Span) Reset() {
+	*x = Span{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_opentelemetry_proto_trace_v1_trace_proto_msgTypes[2]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *Span) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Span) ProtoMessage() {}
+
+func (x *Span) ProtoReflect() protoreflect.Message {
+	mi := &file_opentelemetry_proto_trace_v1_trace_proto_msgTypes[2]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Span.ProtoReflect.Descriptor instead.
+func (*Span) Descriptor() ([]byte, []int) {
+	return file_opentelemetry_proto_trace_v1_trace_proto_rawDescGZIP(), []int{2}
+}
+
+func (x *Span) GetTraceId() []byte {
+	if x != nil {
+		return x.TraceId
+	}
+	return nil
+}
+
+func (x *Span) GetSpanId() []byte {
+	if x != nil {
+		return x.SpanId
+	}
+	return nil
+}
+
+func (x *Span) GetTraceState() string {
+	if x != nil {
+		return x.TraceState
+	}
+	return ""
+}
+
+func (x *Span) GetParentSpanId() []byte {
+	if x != nil {
+		return x.ParentSpanId
+	}
+	return nil
+}
+
+func (x *Span) GetName() string {
+	if x != nil {
+		return x.Name
+	}
+	return ""
+}
+
+func (x *Span) GetKind() Span_SpanKind {
+	if x != nil {
+		return x.Kind
+	}
+	return Span_SPAN_KIND_UNSPECIFIED
+}
+
+func (x *Span) GetStartTimeUnixNano() uint64 {
+	if x != nil {
+		return x.StartTimeUnixNano
+	}
+	return 0
+}
+
+func (x *Span) GetEndTimeUnixNano() uint64 {
+	if x != nil {
+		return x.EndTimeUnixNano
+	}
+	return 0
+}
+
+func (x *Span) GetAttributes() []*v11.KeyValue {
+	if x != nil {
+		return x.Attributes
+	}
+	return nil
+}
+
+func (x *Span) GetDroppedAttributesCount() uint32 {
+	if x != nil {
+		return x.DroppedAttributesCount
+	}
+	return 0
+}
+
+func (x *Span) GetEvents() []*Span_Event {
+	if x != nil {
+		return x.Events
+	}
+	return nil
+}
+
+func (x *Span) GetDroppedEventsCount() uint32 {
+	if x != nil {
+		return x.DroppedEventsCount
+	}
+	return 0
+}
+
+func (x *Span) GetLinks() []*Span_Link {
+	if x != nil {
+		return x.Links
+	}
+	return nil
+}
+
+func (x *Span) GetDroppedLinksCount() uint32 {
+	if x != nil {
+		return x.DroppedLinksCount
+	}
+	return 0
+}
+
+func (x *Span) GetStatus() *Status {
+	if x != nil {
+		return x.Status
+	}
+	return nil
+}
+
+// The Status type defines a logical error model that is suitable for different
+// programming environments, including REST APIs and RPC APIs.
+type Status struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// The deprecated status code. This is an optional field.
+	//
+	// This field is deprecated and is replaced by the `code` field below. See backward
+	// compatibility notes below. According to our stability guarantees this field
+	// will be removed in 12 months, on Oct 22, 2021. All usage of old senders and
+	// receivers that do not understand the `code` field MUST be phased out by then.
+	//
+	// Deprecated: Do not use.
+	DeprecatedCode Status_DeprecatedStatusCode `protobuf:"varint,1,opt,name=deprecated_code,json=deprecatedCode,proto3,enum=opentelemetry.proto.trace.v1.Status_DeprecatedStatusCode" json:"deprecated_code,omitempty"`
+	// A developer-facing human readable error message.
+	Message string `protobuf:"bytes,2,opt,name=message,proto3" json:"message,omitempty"`
+	// The status code.
+	Code Status_StatusCode `protobuf:"varint,3,opt,name=code,proto3,enum=opentelemetry.proto.trace.v1.Status_StatusCode" json:"code,omitempty"`
+}
+
+func (x *Status) Reset() {
+	*x = Status{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_opentelemetry_proto_trace_v1_trace_proto_msgTypes[3]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *Status) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Status) ProtoMessage() {}
+
+func (x *Status) ProtoReflect() protoreflect.Message {
+	mi := &file_opentelemetry_proto_trace_v1_trace_proto_msgTypes[3]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Status.ProtoReflect.Descriptor instead.
+func (*Status) Descriptor() ([]byte, []int) {
+	return file_opentelemetry_proto_trace_v1_trace_proto_rawDescGZIP(), []int{3}
+}
+
+// Deprecated: Do not use.
+func (x *Status) GetDeprecatedCode() Status_DeprecatedStatusCode {
+	if x != nil {
+		return x.DeprecatedCode
+	}
+	return Status_DEPRECATED_STATUS_CODE_OK
+}
+
+func (x *Status) GetMessage() string {
+	if x != nil {
+		return x.Message
+	}
+	return ""
+}
+
+func (x *Status) GetCode() Status_StatusCode {
+	if x != nil {
+		return x.Code
+	}
+	return Status_STATUS_CODE_UNSET
+}
+
+// Event is a time-stamped annotation of the span, consisting of user-supplied
+// text description and key-value pairs.
+type Span_Event struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// time_unix_nano is the time the event occurred.
+	TimeUnixNano uint64 `protobuf:"fixed64,1,opt,name=time_unix_nano,json=timeUnixNano,proto3" json:"time_unix_nano,omitempty"`
+	// name of the event.
+	// This field is semantically required to be set to non-empty string.
+	Name string `protobuf:"bytes,2,opt,name=name,proto3" json:"name,omitempty"`
+	// attributes is a collection of attribute key/value pairs on the event.
+	Attributes []*v11.KeyValue `protobuf:"bytes,3,rep,name=attributes,proto3" json:"attributes,omitempty"`
+	// dropped_attributes_count is the number of dropped attributes. If the value is 0,
+	// then no attributes were dropped.
+	DroppedAttributesCount uint32 `protobuf:"varint,4,opt,name=dropped_attributes_count,json=droppedAttributesCount,proto3" json:"dropped_attributes_count,omitempty"`
+}
+
+func (x *Span_Event) Reset() {
+	*x = Span_Event{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_opentelemetry_proto_trace_v1_trace_proto_msgTypes[4]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *Span_Event) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Span_Event) ProtoMessage() {}
+
+func (x *Span_Event) ProtoReflect() protoreflect.Message {
+	mi := &file_opentelemetry_proto_trace_v1_trace_proto_msgTypes[4]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Span_Event.ProtoReflect.Descriptor instead.
+func (*Span_Event) Descriptor() ([]byte, []int) {
+	return file_opentelemetry_proto_trace_v1_trace_proto_rawDescGZIP(), []int{2, 0}
+}
+
+func (x *Span_Event) GetTimeUnixNano() uint64 {
+	if x != nil {
+		return x.TimeUnixNano
+	}
+	return 0
+}
+
+func (x *Span_Event) GetName() string {
+	if x != nil {
+		return x.Name
+	}
+	return ""
+}
+
+func (x *Span_Event) GetAttributes() []*v11.KeyValue {
+	if x != nil {
+		return x.Attributes
+	}
+	return nil
+}
+
+func (x *Span_Event) GetDroppedAttributesCount() uint32 {
+	if x != nil {
+		return x.DroppedAttributesCount
+	}
+	return 0
+}
+
+// A pointer from the current span to another span in the same trace or in a
+// different trace. For example, this can be used in batching operations,
+// where a single batch handler processes multiple requests from different
+// traces or when the handler receives a request from a different project.
+type Span_Link struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// A unique identifier of a trace that this linked span is part of. The ID is a
+	// 16-byte array.
+	TraceId []byte `protobuf:"bytes,1,opt,name=trace_id,json=traceId,proto3" json:"trace_id,omitempty"`
+	// A unique identifier for the linked span. The ID is an 8-byte array.
+	SpanId []byte `protobuf:"bytes,2,opt,name=span_id,json=spanId,proto3" json:"span_id,omitempty"`
+	// The trace_state associated with the link.
+	TraceState string `protobuf:"bytes,3,opt,name=trace_state,json=traceState,proto3" json:"trace_state,omitempty"`
+	// attributes is a collection of attribute key/value pairs on the link.
+	Attributes []*v11.KeyValue `protobuf:"bytes,4,rep,name=attributes,proto3" json:"attributes,omitempty"`
+	// dropped_attributes_count is the number of dropped attributes. If the value is 0,
+	// then no attributes were dropped.
+	DroppedAttributesCount uint32 `protobuf:"varint,5,opt,name=dropped_attributes_count,json=droppedAttributesCount,proto3" json:"dropped_attributes_count,omitempty"`
+}
+
+func (x *Span_Link) Reset() {
+	*x = Span_Link{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_opentelemetry_proto_trace_v1_trace_proto_msgTypes[5]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *Span_Link) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Span_Link) ProtoMessage() {}
+
+func (x *Span_Link) ProtoReflect() protoreflect.Message {
+	mi := &file_opentelemetry_proto_trace_v1_trace_proto_msgTypes[5]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Span_Link.ProtoReflect.Descriptor instead.
+func (*Span_Link) Descriptor() ([]byte, []int) {
+	return file_opentelemetry_proto_trace_v1_trace_proto_rawDescGZIP(), []int{2, 1}
+}
+
+func (x *Span_Link) GetTraceId() []byte {
+	if x != nil {
+		return x.TraceId
+	}
+	return nil
+}
+
+func (x *Span_Link) GetSpanId() []byte {
+	if x != nil {
+		return x.SpanId
+	}
+	return nil
+}
+
+func (x *Span_Link) GetTraceState() string {
+	if x != nil {
+		return x.TraceState
+	}
+	return ""
+}
+
+func (x *Span_Link) GetAttributes() []*v11.KeyValue {
+	if x != nil {
+		return x.Attributes
+	}
+	return nil
+}
+
+func (x *Span_Link) GetDroppedAttributesCount() uint32 {
+	if x != nil {
+		return x.DroppedAttributesCount
+	}
+	return 0
+}
+
+var File_opentelemetry_proto_trace_v1_trace_proto protoreflect.FileDescriptor
+
+var file_opentelemetry_proto_trace_v1_trace_proto_rawDesc = []byte{
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+}
+
+var (
+	file_opentelemetry_proto_trace_v1_trace_proto_rawDescOnce sync.Once
+	file_opentelemetry_proto_trace_v1_trace_proto_rawDescData = file_opentelemetry_proto_trace_v1_trace_proto_rawDesc
+)
+
+func file_opentelemetry_proto_trace_v1_trace_proto_rawDescGZIP() []byte {
+	file_opentelemetry_proto_trace_v1_trace_proto_rawDescOnce.Do(func() {
+		file_opentelemetry_proto_trace_v1_trace_proto_rawDescData = protoimpl.X.CompressGZIP(file_opentelemetry_proto_trace_v1_trace_proto_rawDescData)
+	})
+	return file_opentelemetry_proto_trace_v1_trace_proto_rawDescData
+}
+
+var file_opentelemetry_proto_trace_v1_trace_proto_enumTypes = make([]protoimpl.EnumInfo, 3)
+var file_opentelemetry_proto_trace_v1_trace_proto_msgTypes = make([]protoimpl.MessageInfo, 6)
+var file_opentelemetry_proto_trace_v1_trace_proto_goTypes = []interface{}{
+	(Span_SpanKind)(0),                  // 0: opentelemetry.proto.trace.v1.Span.SpanKind
+	(Status_DeprecatedStatusCode)(0),    // 1: opentelemetry.proto.trace.v1.Status.DeprecatedStatusCode
+	(Status_StatusCode)(0),              // 2: opentelemetry.proto.trace.v1.Status.StatusCode
+	(*ResourceSpans)(nil),               // 3: opentelemetry.proto.trace.v1.ResourceSpans
+	(*InstrumentationLibrarySpans)(nil), // 4: opentelemetry.proto.trace.v1.InstrumentationLibrarySpans
+	(*Span)(nil),                        // 5: opentelemetry.proto.trace.v1.Span
+	(*Status)(nil),                      // 6: opentelemetry.proto.trace.v1.Status
+	(*Span_Event)(nil),                  // 7: opentelemetry.proto.trace.v1.Span.Event
+	(*Span_Link)(nil),                   // 8: opentelemetry.proto.trace.v1.Span.Link
+	(*v1.Resource)(nil),                 // 9: opentelemetry.proto.resource.v1.Resource
+	(*v11.InstrumentationLibrary)(nil),  // 10: opentelemetry.proto.common.v1.InstrumentationLibrary
+	(*v11.KeyValue)(nil),                // 11: opentelemetry.proto.common.v1.KeyValue
+}
+var file_opentelemetry_proto_trace_v1_trace_proto_depIdxs = []int32{
+	9,  // 0: opentelemetry.proto.trace.v1.ResourceSpans.resource:type_name -> opentelemetry.proto.resource.v1.Resource
+	4,  // 1: opentelemetry.proto.trace.v1.ResourceSpans.instrumentation_library_spans:type_name -> opentelemetry.proto.trace.v1.InstrumentationLibrarySpans
+	10, // 2: opentelemetry.proto.trace.v1.InstrumentationLibrarySpans.instrumentation_library:type_name -> opentelemetry.proto.common.v1.InstrumentationLibrary
+	5,  // 3: opentelemetry.proto.trace.v1.InstrumentationLibrarySpans.spans:type_name -> opentelemetry.proto.trace.v1.Span
+	0,  // 4: opentelemetry.proto.trace.v1.Span.kind:type_name -> opentelemetry.proto.trace.v1.Span.SpanKind
+	11, // 5: opentelemetry.proto.trace.v1.Span.attributes:type_name -> opentelemetry.proto.common.v1.KeyValue
+	7,  // 6: opentelemetry.proto.trace.v1.Span.events:type_name -> opentelemetry.proto.trace.v1.Span.Event
+	8,  // 7: opentelemetry.proto.trace.v1.Span.links:type_name -> opentelemetry.proto.trace.v1.Span.Link
+	6,  // 8: opentelemetry.proto.trace.v1.Span.status:type_name -> opentelemetry.proto.trace.v1.Status
+	1,  // 9: opentelemetry.proto.trace.v1.Status.deprecated_code:type_name -> opentelemetry.proto.trace.v1.Status.DeprecatedStatusCode
+	2,  // 10: opentelemetry.proto.trace.v1.Status.code:type_name -> opentelemetry.proto.trace.v1.Status.StatusCode
+	11, // 11: opentelemetry.proto.trace.v1.Span.Event.attributes:type_name -> opentelemetry.proto.common.v1.KeyValue
+	11, // 12: opentelemetry.proto.trace.v1.Span.Link.attributes:type_name -> opentelemetry.proto.common.v1.KeyValue
+	13, // [13:13] is the sub-list for method output_type
+	13, // [13:13] is the sub-list for method input_type
+	13, // [13:13] is the sub-list for extension type_name
+	13, // [13:13] is the sub-list for extension extendee
+	0,  // [0:13] is the sub-list for field type_name
+}
+
+func init() { file_opentelemetry_proto_trace_v1_trace_proto_init() }
+func file_opentelemetry_proto_trace_v1_trace_proto_init() {
+	if File_opentelemetry_proto_trace_v1_trace_proto != nil {
+		return
+	}
+	if !protoimpl.UnsafeEnabled {
+		file_opentelemetry_proto_trace_v1_trace_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*ResourceSpans); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_opentelemetry_proto_trace_v1_trace_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*InstrumentationLibrarySpans); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_opentelemetry_proto_trace_v1_trace_proto_msgTypes[2].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*Span); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_opentelemetry_proto_trace_v1_trace_proto_msgTypes[3].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*Status); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_opentelemetry_proto_trace_v1_trace_proto_msgTypes[4].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*Span_Event); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_opentelemetry_proto_trace_v1_trace_proto_msgTypes[5].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*Span_Link); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_opentelemetry_proto_trace_v1_trace_proto_rawDesc,
+			NumEnums:      3,
+			NumMessages:   6,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_opentelemetry_proto_trace_v1_trace_proto_goTypes,
+		DependencyIndexes: file_opentelemetry_proto_trace_v1_trace_proto_depIdxs,
+		EnumInfos:         file_opentelemetry_proto_trace_v1_trace_proto_enumTypes,
+		MessageInfos:      file_opentelemetry_proto_trace_v1_trace_proto_msgTypes,
+	}.Build()
+	File_opentelemetry_proto_trace_v1_trace_proto = out.File
+	file_opentelemetry_proto_trace_v1_trace_proto_rawDesc = nil
+	file_opentelemetry_proto_trace_v1_trace_proto_goTypes = nil
+	file_opentelemetry_proto_trace_v1_trace_proto_depIdxs = nil
+}
diff --git a/vendor/google.golang.org/genproto/googleapis/api/httpbody/httpbody.pb.go b/vendor/google.golang.org/genproto/googleapis/api/httpbody/httpbody.pb.go
new file mode 100644
index 000000000..5b6c587a9
--- /dev/null
+++ b/vendor/google.golang.org/genproto/googleapis/api/httpbody/httpbody.pb.go
@@ -0,0 +1,146 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: google/api/httpbody.proto
+
+package httpbody
+
+import (
+	fmt "fmt"
+	math "math"
+
+	proto "github.com/golang/protobuf/proto"
+	any "github.com/golang/protobuf/ptypes/any"
+)
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion3 // please upgrade the proto package
+
+// Message that represents an arbitrary HTTP body. It should only be used for
+// payload formats that can't be represented as JSON, such as raw binary or
+// an HTML page.
+//
+//
+// This message can be used both in streaming and non-streaming API methods in
+// the request as well as the response.
+//
+// It can be used as a top-level request field, which is convenient if one
+// wants to extract parameters from either the URL or HTTP template into the
+// request fields and also want access to the raw HTTP body.
+//
+// Example:
+//
+//     message GetResourceRequest {
+//       // A unique request id.
+//       string request_id = 1;
+//
+//       // The raw HTTP body is bound to this field.
+//       google.api.HttpBody http_body = 2;
+//     }
+//
+//     service ResourceService {
+//       rpc GetResource(GetResourceRequest) returns (google.api.HttpBody);
+//       rpc UpdateResource(google.api.HttpBody) returns
+//       (google.protobuf.Empty);
+//     }
+//
+// Example with streaming methods:
+//
+//     service CaldavService {
+//       rpc GetCalendar(stream google.api.HttpBody)
+//         returns (stream google.api.HttpBody);
+//       rpc UpdateCalendar(stream google.api.HttpBody)
+//         returns (stream google.api.HttpBody);
+//     }
+//
+// Use of this type only changes how the request and response bodies are
+// handled, all other features will continue to work unchanged.
+type HttpBody struct {
+	// The HTTP Content-Type header value specifying the content type of the body.
+	ContentType string `protobuf:"bytes,1,opt,name=content_type,json=contentType,proto3" json:"content_type,omitempty"`
+	// The HTTP request/response body as raw binary.
+	Data []byte `protobuf:"bytes,2,opt,name=data,proto3" json:"data,omitempty"`
+	// Application specific response metadata. Must be set in the first response
+	// for streaming APIs.
+	Extensions           []*any.Any `protobuf:"bytes,3,rep,name=extensions,proto3" json:"extensions,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}   `json:"-"`
+	XXX_unrecognized     []byte     `json:"-"`
+	XXX_sizecache        int32      `json:"-"`
+}
+
+func (m *HttpBody) Reset()         { *m = HttpBody{} }
+func (m *HttpBody) String() string { return proto.CompactTextString(m) }
+func (*HttpBody) ProtoMessage()    {}
+func (*HttpBody) Descriptor() ([]byte, []int) {
+	return fileDescriptor_09ea2ecaa32a0070, []int{0}
+}
+
+func (m *HttpBody) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_HttpBody.Unmarshal(m, b)
+}
+func (m *HttpBody) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_HttpBody.Marshal(b, m, deterministic)
+}
+func (m *HttpBody) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_HttpBody.Merge(m, src)
+}
+func (m *HttpBody) XXX_Size() int {
+	return xxx_messageInfo_HttpBody.Size(m)
+}
+func (m *HttpBody) XXX_DiscardUnknown() {
+	xxx_messageInfo_HttpBody.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_HttpBody proto.InternalMessageInfo
+
+func (m *HttpBody) GetContentType() string {
+	if m != nil {
+		return m.ContentType
+	}
+	return ""
+}
+
+func (m *HttpBody) GetData() []byte {
+	if m != nil {
+		return m.Data
+	}
+	return nil
+}
+
+func (m *HttpBody) GetExtensions() []*any.Any {
+	if m != nil {
+		return m.Extensions
+	}
+	return nil
+}
+
+func init() {
+	proto.RegisterType((*HttpBody)(nil), "google.api.HttpBody")
+}
+
+func init() { proto.RegisterFile("google/api/httpbody.proto", fileDescriptor_09ea2ecaa32a0070) }
+
+var fileDescriptor_09ea2ecaa32a0070 = []byte{
+	// 229 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x54, 0x8f, 0x31, 0x4f, 0xc3, 0x30,
+	0x10, 0x85, 0xe5, 0xb6, 0x42, 0x70, 0x2d, 0x0c, 0x16, 0x43, 0x60, 0x0a, 0x4c, 0x99, 0x6c, 0x09,
+	0xd8, 0x3a, 0x35, 0x0b, 0xb0, 0x45, 0x11, 0x13, 0x0b, 0x72, 0x1a, 0xe3, 0x46, 0x2a, 0x77, 0xa7,
+	0xe6, 0x10, 0xf8, 0xef, 0xf0, 0x2b, 0x19, 0x11, 0x69, 0x2c, 0xe8, 0xf6, 0xe4, 0xef, 0x3d, 0xbf,
+	0x77, 0x70, 0x11, 0x88, 0xc2, 0xd6, 0x5b, 0xc7, 0x9d, 0xdd, 0x88, 0x70, 0x43, 0x6d, 0x34, 0xbc,
+	0x23, 0x21, 0x0d, 0x7b, 0x64, 0x1c, 0x77, 0x97, 0xc9, 0x36, 0x90, 0xe6, 0xfd, 0xd5, 0x3a, 0x1c,
+	0x6d, 0xd7, 0x1f, 0x70, 0xfc, 0x20, 0xc2, 0x25, 0xb5, 0x51, 0x5f, 0xc1, 0x62, 0x4d, 0x28, 0x1e,
+	0xe5, 0x45, 0x22, 0xfb, 0x4c, 0xe5, 0xaa, 0x38, 0xa9, 0xe7, 0xe3, 0xdb, 0x53, 0x64, 0xaf, 0x35,
+	0xcc, 0x5a, 0x27, 0x2e, 0x9b, 0xe4, 0xaa, 0x58, 0xd4, 0x83, 0xd6, 0x77, 0x00, 0xfe, 0x53, 0x3c,
+	0xf6, 0x1d, 0x61, 0x9f, 0x4d, 0xf3, 0x69, 0x31, 0xbf, 0x39, 0x37, 0x63, 0x7d, 0xaa, 0x34, 0x2b,
+	0x8c, 0xf5, 0x3f, 0x5f, 0xb9, 0x81, 0xb3, 0x35, 0xbd, 0x99, 0xbf, 0x95, 0xe5, 0x69, 0x1a, 0x52,
+	0xfd, 0x66, 0x2a, 0xf5, 0xbc, 0x1c, 0x61, 0xa0, 0xad, 0xc3, 0x60, 0x68, 0x17, 0x6c, 0xf0, 0x38,
+	0xfc, 0x68, 0xf7, 0xc8, 0x71, 0xd7, 0x1f, 0x1c, 0xbf, 0x4c, 0xe2, 0x5b, 0xa9, 0xaf, 0xc9, 0xec,
+	0x7e, 0x55, 0x3d, 0x36, 0x47, 0x43, 0xe2, 0xf6, 0x27, 0x00, 0x00, 0xff, 0xff, 0x78, 0xb9, 0x16,
+	0x2b, 0x2d, 0x01, 0x00, 0x00,
+}
diff --git a/vendor/google.golang.org/genproto/googleapis/rpc/errdetails/error_details.pb.go b/vendor/google.golang.org/genproto/googleapis/rpc/errdetails/error_details.pb.go
new file mode 100644
index 000000000..527980750
--- /dev/null
+++ b/vendor/google.golang.org/genproto/googleapis/rpc/errdetails/error_details.pb.go
@@ -0,0 +1,878 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: google/rpc/error_details.proto
+
+package errdetails
+
+import (
+	fmt "fmt"
+	math "math"
+
+	proto "github.com/golang/protobuf/proto"
+	duration "github.com/golang/protobuf/ptypes/duration"
+)
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion3 // please upgrade the proto package
+
+// Describes when the clients can retry a failed request. Clients could ignore
+// the recommendation here or retry when this information is missing from error
+// responses.
+//
+// It's always recommended that clients should use exponential backoff when
+// retrying.
+//
+// Clients should wait until `retry_delay` amount of time has passed since
+// receiving the error response before retrying.  If retrying requests also
+// fail, clients should use an exponential backoff scheme to gradually increase
+// the delay between retries based on `retry_delay`, until either a maximum
+// number of retries have been reached or a maximum retry delay cap has been
+// reached.
+type RetryInfo struct {
+	// Clients should wait at least this long between retrying the same request.
+	RetryDelay           *duration.Duration `protobuf:"bytes,1,opt,name=retry_delay,json=retryDelay,proto3" json:"retry_delay,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}           `json:"-"`
+	XXX_unrecognized     []byte             `json:"-"`
+	XXX_sizecache        int32              `json:"-"`
+}
+
+func (m *RetryInfo) Reset()         { *m = RetryInfo{} }
+func (m *RetryInfo) String() string { return proto.CompactTextString(m) }
+func (*RetryInfo) ProtoMessage()    {}
+func (*RetryInfo) Descriptor() ([]byte, []int) {
+	return fileDescriptor_851816e4d6b6361a, []int{0}
+}
+
+func (m *RetryInfo) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_RetryInfo.Unmarshal(m, b)
+}
+func (m *RetryInfo) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_RetryInfo.Marshal(b, m, deterministic)
+}
+func (m *RetryInfo) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_RetryInfo.Merge(m, src)
+}
+func (m *RetryInfo) XXX_Size() int {
+	return xxx_messageInfo_RetryInfo.Size(m)
+}
+func (m *RetryInfo) XXX_DiscardUnknown() {
+	xxx_messageInfo_RetryInfo.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_RetryInfo proto.InternalMessageInfo
+
+func (m *RetryInfo) GetRetryDelay() *duration.Duration {
+	if m != nil {
+		return m.RetryDelay
+	}
+	return nil
+}
+
+// Describes additional debugging info.
+type DebugInfo struct {
+	// The stack trace entries indicating where the error occurred.
+	StackEntries []string `protobuf:"bytes,1,rep,name=stack_entries,json=stackEntries,proto3" json:"stack_entries,omitempty"`
+	// Additional debugging information provided by the server.
+	Detail               string   `protobuf:"bytes,2,opt,name=detail,proto3" json:"detail,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *DebugInfo) Reset()         { *m = DebugInfo{} }
+func (m *DebugInfo) String() string { return proto.CompactTextString(m) }
+func (*DebugInfo) ProtoMessage()    {}
+func (*DebugInfo) Descriptor() ([]byte, []int) {
+	return fileDescriptor_851816e4d6b6361a, []int{1}
+}
+
+func (m *DebugInfo) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_DebugInfo.Unmarshal(m, b)
+}
+func (m *DebugInfo) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_DebugInfo.Marshal(b, m, deterministic)
+}
+func (m *DebugInfo) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_DebugInfo.Merge(m, src)
+}
+func (m *DebugInfo) XXX_Size() int {
+	return xxx_messageInfo_DebugInfo.Size(m)
+}
+func (m *DebugInfo) XXX_DiscardUnknown() {
+	xxx_messageInfo_DebugInfo.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_DebugInfo proto.InternalMessageInfo
+
+func (m *DebugInfo) GetStackEntries() []string {
+	if m != nil {
+		return m.StackEntries
+	}
+	return nil
+}
+
+func (m *DebugInfo) GetDetail() string {
+	if m != nil {
+		return m.Detail
+	}
+	return ""
+}
+
+// Describes how a quota check failed.
+//
+// For example if a daily limit was exceeded for the calling project,
+// a service could respond with a QuotaFailure detail containing the project
+// id and the description of the quota limit that was exceeded.  If the
+// calling project hasn't enabled the service in the developer console, then
+// a service could respond with the project id and set `service_disabled`
+// to true.
+//
+// Also see RetryInfo and Help types for other details about handling a
+// quota failure.
+type QuotaFailure struct {
+	// Describes all quota violations.
+	Violations           []*QuotaFailure_Violation `protobuf:"bytes,1,rep,name=violations,proto3" json:"violations,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}                  `json:"-"`
+	XXX_unrecognized     []byte                    `json:"-"`
+	XXX_sizecache        int32                     `json:"-"`
+}
+
+func (m *QuotaFailure) Reset()         { *m = QuotaFailure{} }
+func (m *QuotaFailure) String() string { return proto.CompactTextString(m) }
+func (*QuotaFailure) ProtoMessage()    {}
+func (*QuotaFailure) Descriptor() ([]byte, []int) {
+	return fileDescriptor_851816e4d6b6361a, []int{2}
+}
+
+func (m *QuotaFailure) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_QuotaFailure.Unmarshal(m, b)
+}
+func (m *QuotaFailure) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_QuotaFailure.Marshal(b, m, deterministic)
+}
+func (m *QuotaFailure) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_QuotaFailure.Merge(m, src)
+}
+func (m *QuotaFailure) XXX_Size() int {
+	return xxx_messageInfo_QuotaFailure.Size(m)
+}
+func (m *QuotaFailure) XXX_DiscardUnknown() {
+	xxx_messageInfo_QuotaFailure.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_QuotaFailure proto.InternalMessageInfo
+
+func (m *QuotaFailure) GetViolations() []*QuotaFailure_Violation {
+	if m != nil {
+		return m.Violations
+	}
+	return nil
+}
+
+// A message type used to describe a single quota violation.  For example, a
+// daily quota or a custom quota that was exceeded.
+type QuotaFailure_Violation struct {
+	// The subject on which the quota check failed.
+	// For example, "clientip:<ip address of client>" or "project:<Google
+	// developer project id>".
+	Subject string `protobuf:"bytes,1,opt,name=subject,proto3" json:"subject,omitempty"`
+	// A description of how the quota check failed. Clients can use this
+	// description to find more about the quota configuration in the service's
+	// public documentation, or find the relevant quota limit to adjust through
+	// developer console.
+	//
+	// For example: "Service disabled" or "Daily Limit for read operations
+	// exceeded".
+	Description          string   `protobuf:"bytes,2,opt,name=description,proto3" json:"description,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *QuotaFailure_Violation) Reset()         { *m = QuotaFailure_Violation{} }
+func (m *QuotaFailure_Violation) String() string { return proto.CompactTextString(m) }
+func (*QuotaFailure_Violation) ProtoMessage()    {}
+func (*QuotaFailure_Violation) Descriptor() ([]byte, []int) {
+	return fileDescriptor_851816e4d6b6361a, []int{2, 0}
+}
+
+func (m *QuotaFailure_Violation) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_QuotaFailure_Violation.Unmarshal(m, b)
+}
+func (m *QuotaFailure_Violation) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_QuotaFailure_Violation.Marshal(b, m, deterministic)
+}
+func (m *QuotaFailure_Violation) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_QuotaFailure_Violation.Merge(m, src)
+}
+func (m *QuotaFailure_Violation) XXX_Size() int {
+	return xxx_messageInfo_QuotaFailure_Violation.Size(m)
+}
+func (m *QuotaFailure_Violation) XXX_DiscardUnknown() {
+	xxx_messageInfo_QuotaFailure_Violation.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_QuotaFailure_Violation proto.InternalMessageInfo
+
+func (m *QuotaFailure_Violation) GetSubject() string {
+	if m != nil {
+		return m.Subject
+	}
+	return ""
+}
+
+func (m *QuotaFailure_Violation) GetDescription() string {
+	if m != nil {
+		return m.Description
+	}
+	return ""
+}
+
+// Describes the cause of the error with structured details.
+//
+// Example of an error when contacting the "pubsub.googleapis.com" API when it
+// is not enabled:
+//     { "type":   "API_DISABLED"
+//       "domain": "googleapis.com"
+//       "metadata": {
+//         "resource": "projects/123",
+//         "service": "pubsub.googleapis.com"
+//       }
+//     }
+// This response indicates that the pubsub.googleapis.com API is not enabled.
+//
+// Example of an error that is returned when attempting to create a Spanner
+// instance in a region that is out of stock:
+//     { "type":   "STOCKOUT"
+//       "domain": "spanner.googleapis.com",
+//       "metadata": {
+//         "availableRegions": ""us-central1,us-east2"
+//       }
+//     }
+//
+type ErrorInfo struct {
+	// The type of the error. This is a constant value that identifies the
+	// proximate cause of the error. Error types are unique within a particular
+	// source of errors. This should be at most 63 characters and match
+	// /[A-Z0-9_]+/.
+	Type string `protobuf:"bytes,1,opt,name=type,proto3" json:"type,omitempty"`
+	// The logical grouping to which the "type" belongs.  Often "domain" will
+	// contain the registered service name of the tool or product that is the
+	// source of the error. Example: "pubsub.googleapis.com". If the error is
+	// common across many APIs, the first segment of the example above will be
+	// omitted.  The value will be, "googleapis.com".
+	Domain string `protobuf:"bytes,2,opt,name=domain,proto3" json:"domain,omitempty"`
+	// Additional structured details about this error.
+	//
+	// Keys should match /[a-zA-Z0-9-_]/ and be limited to 64 characters in
+	// length. When identifying the current value of an exceeded limit, the units
+	// should be contained in the key, not the value.  For example, rather than
+	// {"instanceLimit": "100/request"}, should be returned as,
+	// {"instanceLimitPerRequest": "100"}, if the client exceeds the number of
+	// instances that can be created in a single (batch) request.
+	Metadata             map[string]string `protobuf:"bytes,3,rep,name=metadata,proto3" json:"metadata,omitempty" protobuf_key:"bytes,1,opt,name=key,proto3" protobuf_val:"bytes,2,opt,name=value,proto3"`
+	XXX_NoUnkeyedLiteral struct{}          `json:"-"`
+	XXX_unrecognized     []byte            `json:"-"`
+	XXX_sizecache        int32             `json:"-"`
+}
+
+func (m *ErrorInfo) Reset()         { *m = ErrorInfo{} }
+func (m *ErrorInfo) String() string { return proto.CompactTextString(m) }
+func (*ErrorInfo) ProtoMessage()    {}
+func (*ErrorInfo) Descriptor() ([]byte, []int) {
+	return fileDescriptor_851816e4d6b6361a, []int{3}
+}
+
+func (m *ErrorInfo) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_ErrorInfo.Unmarshal(m, b)
+}
+func (m *ErrorInfo) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_ErrorInfo.Marshal(b, m, deterministic)
+}
+func (m *ErrorInfo) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_ErrorInfo.Merge(m, src)
+}
+func (m *ErrorInfo) XXX_Size() int {
+	return xxx_messageInfo_ErrorInfo.Size(m)
+}
+func (m *ErrorInfo) XXX_DiscardUnknown() {
+	xxx_messageInfo_ErrorInfo.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_ErrorInfo proto.InternalMessageInfo
+
+func (m *ErrorInfo) GetType() string {
+	if m != nil {
+		return m.Type
+	}
+	return ""
+}
+
+func (m *ErrorInfo) GetDomain() string {
+	if m != nil {
+		return m.Domain
+	}
+	return ""
+}
+
+func (m *ErrorInfo) GetMetadata() map[string]string {
+	if m != nil {
+		return m.Metadata
+	}
+	return nil
+}
+
+// Describes what preconditions have failed.
+//
+// For example, if an RPC failed because it required the Terms of Service to be
+// acknowledged, it could list the terms of service violation in the
+// PreconditionFailure message.
+type PreconditionFailure struct {
+	// Describes all precondition violations.
+	Violations           []*PreconditionFailure_Violation `protobuf:"bytes,1,rep,name=violations,proto3" json:"violations,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}                         `json:"-"`
+	XXX_unrecognized     []byte                           `json:"-"`
+	XXX_sizecache        int32                            `json:"-"`
+}
+
+func (m *PreconditionFailure) Reset()         { *m = PreconditionFailure{} }
+func (m *PreconditionFailure) String() string { return proto.CompactTextString(m) }
+func (*PreconditionFailure) ProtoMessage()    {}
+func (*PreconditionFailure) Descriptor() ([]byte, []int) {
+	return fileDescriptor_851816e4d6b6361a, []int{4}
+}
+
+func (m *PreconditionFailure) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_PreconditionFailure.Unmarshal(m, b)
+}
+func (m *PreconditionFailure) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_PreconditionFailure.Marshal(b, m, deterministic)
+}
+func (m *PreconditionFailure) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_PreconditionFailure.Merge(m, src)
+}
+func (m *PreconditionFailure) XXX_Size() int {
+	return xxx_messageInfo_PreconditionFailure.Size(m)
+}
+func (m *PreconditionFailure) XXX_DiscardUnknown() {
+	xxx_messageInfo_PreconditionFailure.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_PreconditionFailure proto.InternalMessageInfo
+
+func (m *PreconditionFailure) GetViolations() []*PreconditionFailure_Violation {
+	if m != nil {
+		return m.Violations
+	}
+	return nil
+}
+
+// A message type used to describe a single precondition failure.
+type PreconditionFailure_Violation struct {
+	// The type of PreconditionFailure. We recommend using a service-specific
+	// enum type to define the supported precondition violation subjects. For
+	// example, "TOS" for "Terms of Service violation".
+	Type string `protobuf:"bytes,1,opt,name=type,proto3" json:"type,omitempty"`
+	// The subject, relative to the type, that failed.
+	// For example, "google.com/cloud" relative to the "TOS" type would indicate
+	// which terms of service is being referenced.
+	Subject string `protobuf:"bytes,2,opt,name=subject,proto3" json:"subject,omitempty"`
+	// A description of how the precondition failed. Developers can use this
+	// description to understand how to fix the failure.
+	//
+	// For example: "Terms of service not accepted".
+	Description          string   `protobuf:"bytes,3,opt,name=description,proto3" json:"description,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *PreconditionFailure_Violation) Reset()         { *m = PreconditionFailure_Violation{} }
+func (m *PreconditionFailure_Violation) String() string { return proto.CompactTextString(m) }
+func (*PreconditionFailure_Violation) ProtoMessage()    {}
+func (*PreconditionFailure_Violation) Descriptor() ([]byte, []int) {
+	return fileDescriptor_851816e4d6b6361a, []int{4, 0}
+}
+
+func (m *PreconditionFailure_Violation) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_PreconditionFailure_Violation.Unmarshal(m, b)
+}
+func (m *PreconditionFailure_Violation) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_PreconditionFailure_Violation.Marshal(b, m, deterministic)
+}
+func (m *PreconditionFailure_Violation) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_PreconditionFailure_Violation.Merge(m, src)
+}
+func (m *PreconditionFailure_Violation) XXX_Size() int {
+	return xxx_messageInfo_PreconditionFailure_Violation.Size(m)
+}
+func (m *PreconditionFailure_Violation) XXX_DiscardUnknown() {
+	xxx_messageInfo_PreconditionFailure_Violation.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_PreconditionFailure_Violation proto.InternalMessageInfo
+
+func (m *PreconditionFailure_Violation) GetType() string {
+	if m != nil {
+		return m.Type
+	}
+	return ""
+}
+
+func (m *PreconditionFailure_Violation) GetSubject() string {
+	if m != nil {
+		return m.Subject
+	}
+	return ""
+}
+
+func (m *PreconditionFailure_Violation) GetDescription() string {
+	if m != nil {
+		return m.Description
+	}
+	return ""
+}
+
+// Describes violations in a client request. This error type focuses on the
+// syntactic aspects of the request.
+type BadRequest struct {
+	// Describes all violations in a client request.
+	FieldViolations      []*BadRequest_FieldViolation `protobuf:"bytes,1,rep,name=field_violations,json=fieldViolations,proto3" json:"field_violations,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}                     `json:"-"`
+	XXX_unrecognized     []byte                       `json:"-"`
+	XXX_sizecache        int32                        `json:"-"`
+}
+
+func (m *BadRequest) Reset()         { *m = BadRequest{} }
+func (m *BadRequest) String() string { return proto.CompactTextString(m) }
+func (*BadRequest) ProtoMessage()    {}
+func (*BadRequest) Descriptor() ([]byte, []int) {
+	return fileDescriptor_851816e4d6b6361a, []int{5}
+}
+
+func (m *BadRequest) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_BadRequest.Unmarshal(m, b)
+}
+func (m *BadRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_BadRequest.Marshal(b, m, deterministic)
+}
+func (m *BadRequest) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_BadRequest.Merge(m, src)
+}
+func (m *BadRequest) XXX_Size() int {
+	return xxx_messageInfo_BadRequest.Size(m)
+}
+func (m *BadRequest) XXX_DiscardUnknown() {
+	xxx_messageInfo_BadRequest.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_BadRequest proto.InternalMessageInfo
+
+func (m *BadRequest) GetFieldViolations() []*BadRequest_FieldViolation {
+	if m != nil {
+		return m.FieldViolations
+	}
+	return nil
+}
+
+// A message type used to describe a single bad request field.
+type BadRequest_FieldViolation struct {
+	// A path leading to a field in the request body. The value will be a
+	// sequence of dot-separated identifiers that identify a protocol buffer
+	// field. E.g., "field_violations.field" would identify this field.
+	Field string `protobuf:"bytes,1,opt,name=field,proto3" json:"field,omitempty"`
+	// A description of why the request element is bad.
+	Description          string   `protobuf:"bytes,2,opt,name=description,proto3" json:"description,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *BadRequest_FieldViolation) Reset()         { *m = BadRequest_FieldViolation{} }
+func (m *BadRequest_FieldViolation) String() string { return proto.CompactTextString(m) }
+func (*BadRequest_FieldViolation) ProtoMessage()    {}
+func (*BadRequest_FieldViolation) Descriptor() ([]byte, []int) {
+	return fileDescriptor_851816e4d6b6361a, []int{5, 0}
+}
+
+func (m *BadRequest_FieldViolation) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_BadRequest_FieldViolation.Unmarshal(m, b)
+}
+func (m *BadRequest_FieldViolation) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_BadRequest_FieldViolation.Marshal(b, m, deterministic)
+}
+func (m *BadRequest_FieldViolation) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_BadRequest_FieldViolation.Merge(m, src)
+}
+func (m *BadRequest_FieldViolation) XXX_Size() int {
+	return xxx_messageInfo_BadRequest_FieldViolation.Size(m)
+}
+func (m *BadRequest_FieldViolation) XXX_DiscardUnknown() {
+	xxx_messageInfo_BadRequest_FieldViolation.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_BadRequest_FieldViolation proto.InternalMessageInfo
+
+func (m *BadRequest_FieldViolation) GetField() string {
+	if m != nil {
+		return m.Field
+	}
+	return ""
+}
+
+func (m *BadRequest_FieldViolation) GetDescription() string {
+	if m != nil {
+		return m.Description
+	}
+	return ""
+}
+
+// Contains metadata about the request that clients can attach when filing a bug
+// or providing other forms of feedback.
+type RequestInfo struct {
+	// An opaque string that should only be interpreted by the service generating
+	// it. For example, it can be used to identify requests in the service's logs.
+	RequestId string `protobuf:"bytes,1,opt,name=request_id,json=requestId,proto3" json:"request_id,omitempty"`
+	// Any data that was used to serve this request. For example, an encrypted
+	// stack trace that can be sent back to the service provider for debugging.
+	ServingData          string   `protobuf:"bytes,2,opt,name=serving_data,json=servingData,proto3" json:"serving_data,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *RequestInfo) Reset()         { *m = RequestInfo{} }
+func (m *RequestInfo) String() string { return proto.CompactTextString(m) }
+func (*RequestInfo) ProtoMessage()    {}
+func (*RequestInfo) Descriptor() ([]byte, []int) {
+	return fileDescriptor_851816e4d6b6361a, []int{6}
+}
+
+func (m *RequestInfo) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_RequestInfo.Unmarshal(m, b)
+}
+func (m *RequestInfo) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_RequestInfo.Marshal(b, m, deterministic)
+}
+func (m *RequestInfo) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_RequestInfo.Merge(m, src)
+}
+func (m *RequestInfo) XXX_Size() int {
+	return xxx_messageInfo_RequestInfo.Size(m)
+}
+func (m *RequestInfo) XXX_DiscardUnknown() {
+	xxx_messageInfo_RequestInfo.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_RequestInfo proto.InternalMessageInfo
+
+func (m *RequestInfo) GetRequestId() string {
+	if m != nil {
+		return m.RequestId
+	}
+	return ""
+}
+
+func (m *RequestInfo) GetServingData() string {
+	if m != nil {
+		return m.ServingData
+	}
+	return ""
+}
+
+// Describes the resource that is being accessed.
+type ResourceInfo struct {
+	// A name for the type of resource being accessed, e.g. "sql table",
+	// "cloud storage bucket", "file", "Google calendar"; or the type URL
+	// of the resource: e.g. "type.googleapis.com/google.pubsub.v1.Topic".
+	ResourceType string `protobuf:"bytes,1,opt,name=resource_type,json=resourceType,proto3" json:"resource_type,omitempty"`
+	// The name of the resource being accessed.  For example, a shared calendar
+	// name: "example.com_4fghdhgsrgh@group.calendar.google.com", if the current
+	// error is [google.rpc.Code.PERMISSION_DENIED][google.rpc.Code.PERMISSION_DENIED].
+	ResourceName string `protobuf:"bytes,2,opt,name=resource_name,json=resourceName,proto3" json:"resource_name,omitempty"`
+	// The owner of the resource (optional).
+	// For example, "user:<owner email>" or "project:<Google developer project
+	// id>".
+	Owner string `protobuf:"bytes,3,opt,name=owner,proto3" json:"owner,omitempty"`
+	// Describes what error is encountered when accessing this resource.
+	// For example, updating a cloud project may require the `writer` permission
+	// on the developer console project.
+	Description          string   `protobuf:"bytes,4,opt,name=description,proto3" json:"description,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *ResourceInfo) Reset()         { *m = ResourceInfo{} }
+func (m *ResourceInfo) String() string { return proto.CompactTextString(m) }
+func (*ResourceInfo) ProtoMessage()    {}
+func (*ResourceInfo) Descriptor() ([]byte, []int) {
+	return fileDescriptor_851816e4d6b6361a, []int{7}
+}
+
+func (m *ResourceInfo) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_ResourceInfo.Unmarshal(m, b)
+}
+func (m *ResourceInfo) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_ResourceInfo.Marshal(b, m, deterministic)
+}
+func (m *ResourceInfo) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_ResourceInfo.Merge(m, src)
+}
+func (m *ResourceInfo) XXX_Size() int {
+	return xxx_messageInfo_ResourceInfo.Size(m)
+}
+func (m *ResourceInfo) XXX_DiscardUnknown() {
+	xxx_messageInfo_ResourceInfo.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_ResourceInfo proto.InternalMessageInfo
+
+func (m *ResourceInfo) GetResourceType() string {
+	if m != nil {
+		return m.ResourceType
+	}
+	return ""
+}
+
+func (m *ResourceInfo) GetResourceName() string {
+	if m != nil {
+		return m.ResourceName
+	}
+	return ""
+}
+
+func (m *ResourceInfo) GetOwner() string {
+	if m != nil {
+		return m.Owner
+	}
+	return ""
+}
+
+func (m *ResourceInfo) GetDescription() string {
+	if m != nil {
+		return m.Description
+	}
+	return ""
+}
+
+// Provides links to documentation or for performing an out of band action.
+//
+// For example, if a quota check failed with an error indicating the calling
+// project hasn't enabled the accessed service, this can contain a URL pointing
+// directly to the right place in the developer console to flip the bit.
+type Help struct {
+	// URL(s) pointing to additional information on handling the current error.
+	Links                []*Help_Link `protobuf:"bytes,1,rep,name=links,proto3" json:"links,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}     `json:"-"`
+	XXX_unrecognized     []byte       `json:"-"`
+	XXX_sizecache        int32        `json:"-"`
+}
+
+func (m *Help) Reset()         { *m = Help{} }
+func (m *Help) String() string { return proto.CompactTextString(m) }
+func (*Help) ProtoMessage()    {}
+func (*Help) Descriptor() ([]byte, []int) {
+	return fileDescriptor_851816e4d6b6361a, []int{8}
+}
+
+func (m *Help) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Help.Unmarshal(m, b)
+}
+func (m *Help) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Help.Marshal(b, m, deterministic)
+}
+func (m *Help) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Help.Merge(m, src)
+}
+func (m *Help) XXX_Size() int {
+	return xxx_messageInfo_Help.Size(m)
+}
+func (m *Help) XXX_DiscardUnknown() {
+	xxx_messageInfo_Help.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Help proto.InternalMessageInfo
+
+func (m *Help) GetLinks() []*Help_Link {
+	if m != nil {
+		return m.Links
+	}
+	return nil
+}
+
+// Describes a URL link.
+type Help_Link struct {
+	// Describes what the link offers.
+	Description string `protobuf:"bytes,1,opt,name=description,proto3" json:"description,omitempty"`
+	// The URL of the link.
+	Url                  string   `protobuf:"bytes,2,opt,name=url,proto3" json:"url,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *Help_Link) Reset()         { *m = Help_Link{} }
+func (m *Help_Link) String() string { return proto.CompactTextString(m) }
+func (*Help_Link) ProtoMessage()    {}
+func (*Help_Link) Descriptor() ([]byte, []int) {
+	return fileDescriptor_851816e4d6b6361a, []int{8, 0}
+}
+
+func (m *Help_Link) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Help_Link.Unmarshal(m, b)
+}
+func (m *Help_Link) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Help_Link.Marshal(b, m, deterministic)
+}
+func (m *Help_Link) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Help_Link.Merge(m, src)
+}
+func (m *Help_Link) XXX_Size() int {
+	return xxx_messageInfo_Help_Link.Size(m)
+}
+func (m *Help_Link) XXX_DiscardUnknown() {
+	xxx_messageInfo_Help_Link.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Help_Link proto.InternalMessageInfo
+
+func (m *Help_Link) GetDescription() string {
+	if m != nil {
+		return m.Description
+	}
+	return ""
+}
+
+func (m *Help_Link) GetUrl() string {
+	if m != nil {
+		return m.Url
+	}
+	return ""
+}
+
+// Provides a localized error message that is safe to return to the user
+// which can be attached to an RPC error.
+type LocalizedMessage struct {
+	// The locale used following the specification defined at
+	// http://www.rfc-editor.org/rfc/bcp/bcp47.txt.
+	// Examples are: "en-US", "fr-CH", "es-MX"
+	Locale string `protobuf:"bytes,1,opt,name=locale,proto3" json:"locale,omitempty"`
+	// The localized error message in the above locale.
+	Message              string   `protobuf:"bytes,2,opt,name=message,proto3" json:"message,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *LocalizedMessage) Reset()         { *m = LocalizedMessage{} }
+func (m *LocalizedMessage) String() string { return proto.CompactTextString(m) }
+func (*LocalizedMessage) ProtoMessage()    {}
+func (*LocalizedMessage) Descriptor() ([]byte, []int) {
+	return fileDescriptor_851816e4d6b6361a, []int{9}
+}
+
+func (m *LocalizedMessage) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_LocalizedMessage.Unmarshal(m, b)
+}
+func (m *LocalizedMessage) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_LocalizedMessage.Marshal(b, m, deterministic)
+}
+func (m *LocalizedMessage) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_LocalizedMessage.Merge(m, src)
+}
+func (m *LocalizedMessage) XXX_Size() int {
+	return xxx_messageInfo_LocalizedMessage.Size(m)
+}
+func (m *LocalizedMessage) XXX_DiscardUnknown() {
+	xxx_messageInfo_LocalizedMessage.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_LocalizedMessage proto.InternalMessageInfo
+
+func (m *LocalizedMessage) GetLocale() string {
+	if m != nil {
+		return m.Locale
+	}
+	return ""
+}
+
+func (m *LocalizedMessage) GetMessage() string {
+	if m != nil {
+		return m.Message
+	}
+	return ""
+}
+
+func init() {
+	proto.RegisterType((*RetryInfo)(nil), "google.rpc.RetryInfo")
+	proto.RegisterType((*DebugInfo)(nil), "google.rpc.DebugInfo")
+	proto.RegisterType((*QuotaFailure)(nil), "google.rpc.QuotaFailure")
+	proto.RegisterType((*QuotaFailure_Violation)(nil), "google.rpc.QuotaFailure.Violation")
+	proto.RegisterType((*ErrorInfo)(nil), "google.rpc.ErrorInfo")
+	proto.RegisterMapType((map[string]string)(nil), "google.rpc.ErrorInfo.MetadataEntry")
+	proto.RegisterType((*PreconditionFailure)(nil), "google.rpc.PreconditionFailure")
+	proto.RegisterType((*PreconditionFailure_Violation)(nil), "google.rpc.PreconditionFailure.Violation")
+	proto.RegisterType((*BadRequest)(nil), "google.rpc.BadRequest")
+	proto.RegisterType((*BadRequest_FieldViolation)(nil), "google.rpc.BadRequest.FieldViolation")
+	proto.RegisterType((*RequestInfo)(nil), "google.rpc.RequestInfo")
+	proto.RegisterType((*ResourceInfo)(nil), "google.rpc.ResourceInfo")
+	proto.RegisterType((*Help)(nil), "google.rpc.Help")
+	proto.RegisterType((*Help_Link)(nil), "google.rpc.Help.Link")
+	proto.RegisterType((*LocalizedMessage)(nil), "google.rpc.LocalizedMessage")
+}
+
+func init() { proto.RegisterFile("google/rpc/error_details.proto", fileDescriptor_851816e4d6b6361a) }
+
+var fileDescriptor_851816e4d6b6361a = []byte{
+	// 669 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x8c, 0x54, 0x4d, 0x6f, 0xd3, 0x4a,
+	0x14, 0x95, 0x93, 0xb4, 0xef, 0xf9, 0x26, 0xed, 0xeb, 0xf3, 0x7b, 0xa0, 0x10, 0x09, 0x14, 0x5c,
+	0x21, 0x15, 0x21, 0x39, 0x52, 0xd9, 0xa0, 0x76, 0x51, 0x29, 0xa4, 0x5f, 0x52, 0x0b, 0xc1, 0x42,
+	0x2c, 0x60, 0x61, 0x4d, 0xec, 0x1b, 0x6b, 0x88, 0xe3, 0x31, 0xe3, 0x71, 0x51, 0xf8, 0x15, 0xec,
+	0xd9, 0xb1, 0xe2, 0x0f, 0xb0, 0xe4, 0xbf, 0xa1, 0xf9, 0x4a, 0xdc, 0xa6, 0x20, 0x76, 0x73, 0xee,
+	0x9c, 0x39, 0x73, 0xcf, 0xd1, 0x9d, 0x81, 0x07, 0x29, 0x63, 0x69, 0x86, 0x03, 0x5e, 0xc4, 0x03,
+	0xe4, 0x9c, 0xf1, 0x28, 0x41, 0x41, 0x68, 0x56, 0x06, 0x05, 0x67, 0x82, 0x79, 0xa0, 0xf7, 0x03,
+	0x5e, 0xc4, 0x3d, 0xcb, 0x55, 0x3b, 0x93, 0x6a, 0x3a, 0x48, 0x2a, 0x4e, 0x04, 0x65, 0xb9, 0xe6,
+	0xfa, 0xa7, 0xe0, 0x86, 0x28, 0xf8, 0xe2, 0x3c, 0x9f, 0x32, 0xef, 0x00, 0xda, 0x5c, 0x82, 0x28,
+	0xc1, 0x8c, 0x2c, 0xba, 0x4e, 0xdf, 0xd9, 0x6b, 0xef, 0xdf, 0x0b, 0x8c, 0x9c, 0x95, 0x08, 0x46,
+	0x46, 0x22, 0x04, 0xc5, 0x1e, 0x49, 0xb2, 0x7f, 0x06, 0xee, 0x08, 0x27, 0x55, 0xaa, 0x84, 0x76,
+	0x61, 0xab, 0x14, 0x24, 0x9e, 0x45, 0x98, 0x0b, 0x4e, 0xb1, 0xec, 0x3a, 0xfd, 0xe6, 0x9e, 0x1b,
+	0x76, 0x54, 0xf1, 0x58, 0xd7, 0xbc, 0xbb, 0xb0, 0xa9, 0xfb, 0xee, 0x36, 0xfa, 0xce, 0x9e, 0x1b,
+	0x1a, 0xe4, 0x7f, 0x71, 0xa0, 0xf3, 0xaa, 0x62, 0x82, 0x9c, 0x10, 0x9a, 0x55, 0x1c, 0xbd, 0x21,
+	0xc0, 0x15, 0x65, 0x99, 0xba, 0x53, 0x4b, 0xb5, 0xf7, 0xfd, 0x60, 0x65, 0x32, 0xa8, 0xb3, 0x83,
+	0x37, 0x96, 0x1a, 0xd6, 0x4e, 0xf5, 0x4e, 0xc1, 0x5d, 0x6e, 0x78, 0x5d, 0xf8, 0xab, 0xac, 0x26,
+	0xef, 0x31, 0x16, 0xca, 0xa3, 0x1b, 0x5a, 0xe8, 0xf5, 0xa1, 0x9d, 0x60, 0x19, 0x73, 0x5a, 0x48,
+	0xa2, 0x69, 0xac, 0x5e, 0xf2, 0xbf, 0x3b, 0xe0, 0x1e, 0xcb, 0xd0, 0x95, 0x51, 0x0f, 0x5a, 0x62,
+	0x51, 0xa0, 0x91, 0x51, 0x6b, 0xe5, 0x8b, 0xcd, 0x09, 0xcd, 0x97, 0xbe, 0x14, 0xf2, 0x8e, 0xe0,
+	0xef, 0x39, 0x0a, 0x92, 0x10, 0x41, 0xba, 0x4d, 0x65, 0x62, 0xb7, 0x6e, 0x62, 0x29, 0x1a, 0x5c,
+	0x1a, 0x96, 0x0c, 0x6a, 0x11, 0x2e, 0x0f, 0xf5, 0x0e, 0x61, 0xeb, 0xda, 0x96, 0xb7, 0x03, 0xcd,
+	0x19, 0x2e, 0xcc, 0xe5, 0x72, 0xe9, 0xfd, 0x0f, 0x1b, 0x57, 0x24, 0xab, 0xd0, 0x5c, 0xad, 0xc1,
+	0x41, 0xe3, 0x99, 0xe3, 0xff, 0x70, 0xe0, 0xbf, 0x31, 0xc7, 0x98, 0xe5, 0x09, 0x95, 0x46, 0x6c,
+	0xb8, 0xe7, 0xb7, 0x84, 0xfb, 0xb8, 0xde, 0xd7, 0x2d, 0x87, 0x7e, 0x91, 0xf1, 0xbb, 0x7a, 0xc6,
+	0xb7, 0x25, 0x53, 0xcb, 0xbd, 0xf1, 0xdb, 0xdc, 0x9b, 0xeb, 0xb9, 0x7f, 0x73, 0x00, 0x86, 0x24,
+	0x09, 0xf1, 0x43, 0x85, 0xa5, 0xf0, 0xc6, 0xb0, 0x33, 0xa5, 0x98, 0x25, 0xd1, 0x5a, 0xf3, 0x8f,
+	0xea, 0xcd, 0xaf, 0x4e, 0x04, 0x27, 0x92, 0xbe, 0x6a, 0xfc, 0x9f, 0xe9, 0x35, 0x5c, 0xf6, 0xce,
+	0x60, 0xfb, 0x3a, 0x45, 0x86, 0xa9, 0x48, 0xc6, 0x83, 0x06, 0x7f, 0x30, 0x22, 0x2f, 0xa1, 0x6d,
+	0x2e, 0x55, 0x33, 0x72, 0x1f, 0x80, 0x6b, 0x18, 0x51, 0xab, 0xe5, 0x9a, 0xca, 0x79, 0xe2, 0x3d,
+	0x84, 0x4e, 0x89, 0xfc, 0x8a, 0xe6, 0x69, 0xa4, 0x46, 0xc3, 0x08, 0x9a, 0xda, 0x88, 0x08, 0xe2,
+	0x7f, 0x76, 0xa0, 0x13, 0x62, 0xc9, 0x2a, 0x1e, 0xa3, 0x7d, 0x5f, 0xdc, 0xe0, 0xa8, 0x96, 0x72,
+	0xc7, 0x16, 0x5f, 0xcb, 0xb4, 0xeb, 0xa4, 0x9c, 0xcc, 0xed, 0x4c, 0x2c, 0x49, 0x2f, 0xc8, 0x1c,
+	0xa5, 0x47, 0xf6, 0x31, 0x47, 0x6e, 0x22, 0xd7, 0xe0, 0xa6, 0xc7, 0xd6, 0xba, 0x47, 0x06, 0xad,
+	0x33, 0xcc, 0x0a, 0xef, 0x09, 0x6c, 0x64, 0x34, 0x9f, 0xd9, 0xf0, 0xef, 0xd4, 0xc3, 0x97, 0x84,
+	0xe0, 0x82, 0xe6, 0xb3, 0x50, 0x73, 0x7a, 0x07, 0xd0, 0x92, 0xf0, 0xa6, 0xbc, 0xb3, 0x26, 0x2f,
+	0x27, 0xbb, 0xe2, 0xf6, 0x63, 0x90, 0x4b, 0x7f, 0x04, 0x3b, 0x17, 0x2c, 0x26, 0x19, 0xfd, 0x84,
+	0xc9, 0x25, 0x96, 0x25, 0x49, 0xd5, 0x4b, 0xcb, 0x64, 0xcd, 0xfa, 0x37, 0x48, 0xce, 0xd9, 0x5c,
+	0x53, 0xec, 0x9c, 0x19, 0x38, 0xcc, 0x60, 0x3b, 0x66, 0xf3, 0x5a, 0x93, 0xc3, 0x7f, 0xd5, 0xbb,
+	0x1b, 0xe9, 0x0f, 0x74, 0x2c, 0xbf, 0xb8, 0xb1, 0xf3, 0xf6, 0xc8, 0x10, 0x52, 0x96, 0x91, 0x3c,
+	0x0d, 0x18, 0x4f, 0x07, 0x29, 0xe6, 0xea, 0x03, 0x1c, 0xe8, 0x2d, 0x52, 0xd0, 0xd2, 0x7e, 0xc0,
+	0xe6, 0xf7, 0x3d, 0x5c, 0x2d, 0xbf, 0x36, 0x9a, 0xe1, 0xf8, 0xf9, 0x64, 0x53, 0x9d, 0x78, 0xfa,
+	0x33, 0x00, 0x00, 0xff, 0xff, 0xca, 0x69, 0x10, 0x7f, 0xb1, 0x05, 0x00, 0x00,
+}
diff --git a/vendor/google.golang.org/genproto/protobuf/field_mask/field_mask.pb.go b/vendor/google.golang.org/genproto/protobuf/field_mask/field_mask.pb.go
new file mode 100644
index 000000000..e6a070b8f
--- /dev/null
+++ b/vendor/google.golang.org/genproto/protobuf/field_mask/field_mask.pb.go
@@ -0,0 +1,282 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: google/protobuf/field_mask.proto
+
+package field_mask
+
+import (
+	fmt "fmt"
+	math "math"
+
+	proto "github.com/golang/protobuf/proto"
+)
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion3 // please upgrade the proto package
+
+// `FieldMask` represents a set of symbolic field paths, for example:
+//
+//     paths: "f.a"
+//     paths: "f.b.d"
+//
+// Here `f` represents a field in some root message, `a` and `b`
+// fields in the message found in `f`, and `d` a field found in the
+// message in `f.b`.
+//
+// Field masks are used to specify a subset of fields that should be
+// returned by a get operation or modified by an update operation.
+// Field masks also have a custom JSON encoding (see below).
+//
+// # Field Masks in Projections
+//
+// When used in the context of a projection, a response message or
+// sub-message is filtered by the API to only contain those fields as
+// specified in the mask. For example, if the mask in the previous
+// example is applied to a response message as follows:
+//
+//     f {
+//       a : 22
+//       b {
+//         d : 1
+//         x : 2
+//       }
+//       y : 13
+//     }
+//     z: 8
+//
+// The result will not contain specific values for fields x,y and z
+// (their value will be set to the default, and omitted in proto text
+// output):
+//
+//
+//     f {
+//       a : 22
+//       b {
+//         d : 1
+//       }
+//     }
+//
+// A repeated field is not allowed except at the last position of a
+// paths string.
+//
+// If a FieldMask object is not present in a get operation, the
+// operation applies to all fields (as if a FieldMask of all fields
+// had been specified).
+//
+// Note that a field mask does not necessarily apply to the
+// top-level response message. In case of a REST get operation, the
+// field mask applies directly to the response, but in case of a REST
+// list operation, the mask instead applies to each individual message
+// in the returned resource list. In case of a REST custom method,
+// other definitions may be used. Where the mask applies will be
+// clearly documented together with its declaration in the API.  In
+// any case, the effect on the returned resource/resources is required
+// behavior for APIs.
+//
+// # Field Masks in Update Operations
+//
+// A field mask in update operations specifies which fields of the
+// targeted resource are going to be updated. The API is required
+// to only change the values of the fields as specified in the mask
+// and leave the others untouched. If a resource is passed in to
+// describe the updated values, the API ignores the values of all
+// fields not covered by the mask.
+//
+// If a repeated field is specified for an update operation, new values will
+// be appended to the existing repeated field in the target resource. Note that
+// a repeated field is only allowed in the last position of a `paths` string.
+//
+// If a sub-message is specified in the last position of the field mask for an
+// update operation, then new value will be merged into the existing sub-message
+// in the target resource.
+//
+// For example, given the target message:
+//
+//     f {
+//       b {
+//         d: 1
+//         x: 2
+//       }
+//       c: [1]
+//     }
+//
+// And an update message:
+//
+//     f {
+//       b {
+//         d: 10
+//       }
+//       c: [2]
+//     }
+//
+// then if the field mask is:
+//
+//  paths: ["f.b", "f.c"]
+//
+// then the result will be:
+//
+//     f {
+//       b {
+//         d: 10
+//         x: 2
+//       }
+//       c: [1, 2]
+//     }
+//
+// An implementation may provide options to override this default behavior for
+// repeated and message fields.
+//
+// In order to reset a field's value to the default, the field must
+// be in the mask and set to the default value in the provided resource.
+// Hence, in order to reset all fields of a resource, provide a default
+// instance of the resource and set all fields in the mask, or do
+// not provide a mask as described below.
+//
+// If a field mask is not present on update, the operation applies to
+// all fields (as if a field mask of all fields has been specified).
+// Note that in the presence of schema evolution, this may mean that
+// fields the client does not know and has therefore not filled into
+// the request will be reset to their default. If this is unwanted
+// behavior, a specific service may require a client to always specify
+// a field mask, producing an error if not.
+//
+// As with get operations, the location of the resource which
+// describes the updated values in the request message depends on the
+// operation kind. In any case, the effect of the field mask is
+// required to be honored by the API.
+//
+// ## Considerations for HTTP REST
+//
+// The HTTP kind of an update operation which uses a field mask must
+// be set to PATCH instead of PUT in order to satisfy HTTP semantics
+// (PUT must only be used for full updates).
+//
+// # JSON Encoding of Field Masks
+//
+// In JSON, a field mask is encoded as a single string where paths are
+// separated by a comma. Fields name in each path are converted
+// to/from lower-camel naming conventions.
+//
+// As an example, consider the following message declarations:
+//
+//     message Profile {
+//       User user = 1;
+//       Photo photo = 2;
+//     }
+//     message User {
+//       string display_name = 1;
+//       string address = 2;
+//     }
+//
+// In proto a field mask for `Profile` may look as such:
+//
+//     mask {
+//       paths: "user.display_name"
+//       paths: "photo"
+//     }
+//
+// In JSON, the same mask is represented as below:
+//
+//     {
+//       mask: "user.displayName,photo"
+//     }
+//
+// # Field Masks and Oneof Fields
+//
+// Field masks treat fields in oneofs just as regular fields. Consider the
+// following message:
+//
+//     message SampleMessage {
+//       oneof test_oneof {
+//         string name = 4;
+//         SubMessage sub_message = 9;
+//       }
+//     }
+//
+// The field mask can be:
+//
+//     mask {
+//       paths: "name"
+//     }
+//
+// Or:
+//
+//     mask {
+//       paths: "sub_message"
+//     }
+//
+// Note that oneof type names ("test_oneof" in this case) cannot be used in
+// paths.
+//
+// ## Field Mask Verification
+//
+// The implementation of any API method which has a FieldMask type field in the
+// request should verify the included field paths, and return an
+// `INVALID_ARGUMENT` error if any path is unmappable.
+type FieldMask struct {
+	// The set of field mask paths.
+	Paths                []string `protobuf:"bytes,1,rep,name=paths,proto3" json:"paths,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *FieldMask) Reset()         { *m = FieldMask{} }
+func (m *FieldMask) String() string { return proto.CompactTextString(m) }
+func (*FieldMask) ProtoMessage()    {}
+func (*FieldMask) Descriptor() ([]byte, []int) {
+	return fileDescriptor_5158202634f0da48, []int{0}
+}
+
+func (m *FieldMask) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_FieldMask.Unmarshal(m, b)
+}
+func (m *FieldMask) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_FieldMask.Marshal(b, m, deterministic)
+}
+func (m *FieldMask) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_FieldMask.Merge(m, src)
+}
+func (m *FieldMask) XXX_Size() int {
+	return xxx_messageInfo_FieldMask.Size(m)
+}
+func (m *FieldMask) XXX_DiscardUnknown() {
+	xxx_messageInfo_FieldMask.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_FieldMask proto.InternalMessageInfo
+
+func (m *FieldMask) GetPaths() []string {
+	if m != nil {
+		return m.Paths
+	}
+	return nil
+}
+
+func init() {
+	proto.RegisterType((*FieldMask)(nil), "google.protobuf.FieldMask")
+}
+
+func init() { proto.RegisterFile("google/protobuf/field_mask.proto", fileDescriptor_5158202634f0da48) }
+
+var fileDescriptor_5158202634f0da48 = []byte{
+	// 175 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xe2, 0x52, 0x48, 0xcf, 0xcf, 0x4f,
+	0xcf, 0x49, 0xd5, 0x2f, 0x28, 0xca, 0x2f, 0xc9, 0x4f, 0x2a, 0x4d, 0xd3, 0x4f, 0xcb, 0x4c, 0xcd,
+	0x49, 0x89, 0xcf, 0x4d, 0x2c, 0xce, 0xd6, 0x03, 0x8b, 0x09, 0xf1, 0x43, 0x54, 0xe8, 0xc1, 0x54,
+	0x28, 0x29, 0x72, 0x71, 0xba, 0x81, 0x14, 0xf9, 0x26, 0x16, 0x67, 0x0b, 0x89, 0x70, 0xb1, 0x16,
+	0x24, 0x96, 0x64, 0x14, 0x4b, 0x30, 0x2a, 0x30, 0x6b, 0x70, 0x06, 0x41, 0x38, 0x4e, 0x3d, 0x8c,
+	0x5c, 0xc2, 0xc9, 0xf9, 0xb9, 0x7a, 0x68, 0x5a, 0x9d, 0xf8, 0xe0, 0x1a, 0x03, 0x40, 0x42, 0x01,
+	0x8c, 0x51, 0x96, 0x50, 0x25, 0xe9, 0xf9, 0x39, 0x89, 0x79, 0xe9, 0x7a, 0xf9, 0x45, 0xe9, 0xfa,
+	0xe9, 0xa9, 0x79, 0x60, 0x0d, 0xd8, 0xdc, 0x64, 0x8d, 0x60, 0xfe, 0x60, 0x64, 0x5c, 0xc4, 0xc4,
+	0xec, 0x1e, 0xe0, 0xb4, 0x8a, 0x49, 0xce, 0x1d, 0x62, 0x48, 0x00, 0x54, 0x83, 0x5e, 0x78, 0x6a,
+	0x4e, 0x8e, 0x77, 0x5e, 0x7e, 0x79, 0x5e, 0x48, 0x65, 0x41, 0x6a, 0x71, 0x12, 0x1b, 0xd8, 0x24,
+	0x63, 0x40, 0x00, 0x00, 0x00, 0xff, 0xff, 0xfd, 0xda, 0xb7, 0xa8, 0xed, 0x00, 0x00, 0x00,
+}
diff --git a/vendor/google.golang.org/grpc/encoding/gzip/gzip.go b/vendor/google.golang.org/grpc/encoding/gzip/gzip.go
new file mode 100644
index 000000000..ce2f15ed2
--- /dev/null
+++ b/vendor/google.golang.org/grpc/encoding/gzip/gzip.go
@@ -0,0 +1,133 @@
+/*
+ *
+ * Copyright 2017 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+// Package gzip implements and registers the gzip compressor
+// during the initialization.
+//
+// Experimental
+//
+// Notice: This package is EXPERIMENTAL and may be changed or removed in a
+// later release.
+package gzip
+
+import (
+	"compress/gzip"
+	"encoding/binary"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"sync"
+
+	"google.golang.org/grpc/encoding"
+)
+
+// Name is the name registered for the gzip compressor.
+const Name = "gzip"
+
+func init() {
+	c := &compressor{}
+	c.poolCompressor.New = func() interface{} {
+		return &writer{Writer: gzip.NewWriter(ioutil.Discard), pool: &c.poolCompressor}
+	}
+	encoding.RegisterCompressor(c)
+}
+
+type writer struct {
+	*gzip.Writer
+	pool *sync.Pool
+}
+
+// SetLevel updates the registered gzip compressor to use the compression level specified (gzip.HuffmanOnly is not supported).
+// NOTE: this function must only be called during initialization time (i.e. in an init() function),
+// and is not thread-safe.
+//
+// The error returned will be nil if the specified level is valid.
+func SetLevel(level int) error {
+	if level < gzip.DefaultCompression || level > gzip.BestCompression {
+		return fmt.Errorf("grpc: invalid gzip compression level: %d", level)
+	}
+	c := encoding.GetCompressor(Name).(*compressor)
+	c.poolCompressor.New = func() interface{} {
+		w, err := gzip.NewWriterLevel(ioutil.Discard, level)
+		if err != nil {
+			panic(err)
+		}
+		return &writer{Writer: w, pool: &c.poolCompressor}
+	}
+	return nil
+}
+
+func (c *compressor) Compress(w io.Writer) (io.WriteCloser, error) {
+	z := c.poolCompressor.Get().(*writer)
+	z.Writer.Reset(w)
+	return z, nil
+}
+
+func (z *writer) Close() error {
+	defer z.pool.Put(z)
+	return z.Writer.Close()
+}
+
+type reader struct {
+	*gzip.Reader
+	pool *sync.Pool
+}
+
+func (c *compressor) Decompress(r io.Reader) (io.Reader, error) {
+	z, inPool := c.poolDecompressor.Get().(*reader)
+	if !inPool {
+		newZ, err := gzip.NewReader(r)
+		if err != nil {
+			return nil, err
+		}
+		return &reader{Reader: newZ, pool: &c.poolDecompressor}, nil
+	}
+	if err := z.Reset(r); err != nil {
+		c.poolDecompressor.Put(z)
+		return nil, err
+	}
+	return z, nil
+}
+
+func (z *reader) Read(p []byte) (n int, err error) {
+	n, err = z.Reader.Read(p)
+	if err == io.EOF {
+		z.pool.Put(z)
+	}
+	return n, err
+}
+
+// RFC1952 specifies that the last four bytes "contains the size of
+// the original (uncompressed) input data modulo 2^32."
+// gRPC has a max message size of 2GB so we don't need to worry about wraparound.
+func (c *compressor) DecompressedSize(buf []byte) int {
+	last := len(buf)
+	if last < 4 {
+		return -1
+	}
+	return int(binary.LittleEndian.Uint32(buf[last-4 : last]))
+}
+
+func (c *compressor) Name() string {
+	return Name
+}
+
+type compressor struct {
+	poolCompressor   sync.Pool
+	poolDecompressor sync.Pool
+}
diff --git a/vendor/google.golang.org/protobuf/encoding/protojson/decode.go b/vendor/google.golang.org/protobuf/encoding/protojson/decode.go
new file mode 100644
index 000000000..07da5db34
--- /dev/null
+++ b/vendor/google.golang.org/protobuf/encoding/protojson/decode.go
@@ -0,0 +1,665 @@
+// Copyright 2019 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package protojson
+
+import (
+	"encoding/base64"
+	"fmt"
+	"math"
+	"strconv"
+	"strings"
+
+	"google.golang.org/protobuf/internal/encoding/json"
+	"google.golang.org/protobuf/internal/encoding/messageset"
+	"google.golang.org/protobuf/internal/errors"
+	"google.golang.org/protobuf/internal/flags"
+	"google.golang.org/protobuf/internal/genid"
+	"google.golang.org/protobuf/internal/pragma"
+	"google.golang.org/protobuf/internal/set"
+	"google.golang.org/protobuf/proto"
+	pref "google.golang.org/protobuf/reflect/protoreflect"
+	"google.golang.org/protobuf/reflect/protoregistry"
+)
+
+// Unmarshal reads the given []byte into the given proto.Message.
+// The provided message must be mutable (e.g., a non-nil pointer to a message).
+func Unmarshal(b []byte, m proto.Message) error {
+	return UnmarshalOptions{}.Unmarshal(b, m)
+}
+
+// UnmarshalOptions is a configurable JSON format parser.
+type UnmarshalOptions struct {
+	pragma.NoUnkeyedLiterals
+
+	// If AllowPartial is set, input for messages that will result in missing
+	// required fields will not return an error.
+	AllowPartial bool
+
+	// If DiscardUnknown is set, unknown fields are ignored.
+	DiscardUnknown bool
+
+	// Resolver is used for looking up types when unmarshaling
+	// google.protobuf.Any messages or extension fields.
+	// If nil, this defaults to using protoregistry.GlobalTypes.
+	Resolver interface {
+		protoregistry.MessageTypeResolver
+		protoregistry.ExtensionTypeResolver
+	}
+}
+
+// Unmarshal reads the given []byte and populates the given proto.Message
+// using options in the UnmarshalOptions object.
+// It will clear the message first before setting the fields.
+// If it returns an error, the given message may be partially set.
+// The provided message must be mutable (e.g., a non-nil pointer to a message).
+func (o UnmarshalOptions) Unmarshal(b []byte, m proto.Message) error {
+	return o.unmarshal(b, m)
+}
+
+// unmarshal is a centralized function that all unmarshal operations go through.
+// For profiling purposes, avoid changing the name of this function or
+// introducing other code paths for unmarshal that do not go through this.
+func (o UnmarshalOptions) unmarshal(b []byte, m proto.Message) error {
+	proto.Reset(m)
+
+	if o.Resolver == nil {
+		o.Resolver = protoregistry.GlobalTypes
+	}
+
+	dec := decoder{json.NewDecoder(b), o}
+	if err := dec.unmarshalMessage(m.ProtoReflect(), false); err != nil {
+		return err
+	}
+
+	// Check for EOF.
+	tok, err := dec.Read()
+	if err != nil {
+		return err
+	}
+	if tok.Kind() != json.EOF {
+		return dec.unexpectedTokenError(tok)
+	}
+
+	if o.AllowPartial {
+		return nil
+	}
+	return proto.CheckInitialized(m)
+}
+
+type decoder struct {
+	*json.Decoder
+	opts UnmarshalOptions
+}
+
+// newError returns an error object with position info.
+func (d decoder) newError(pos int, f string, x ...interface{}) error {
+	line, column := d.Position(pos)
+	head := fmt.Sprintf("(line %d:%d): ", line, column)
+	return errors.New(head+f, x...)
+}
+
+// unexpectedTokenError returns a syntax error for the given unexpected token.
+func (d decoder) unexpectedTokenError(tok json.Token) error {
+	return d.syntaxError(tok.Pos(), "unexpected token %s", tok.RawString())
+}
+
+// syntaxError returns a syntax error for given position.
+func (d decoder) syntaxError(pos int, f string, x ...interface{}) error {
+	line, column := d.Position(pos)
+	head := fmt.Sprintf("syntax error (line %d:%d): ", line, column)
+	return errors.New(head+f, x...)
+}
+
+// unmarshalMessage unmarshals a message into the given protoreflect.Message.
+func (d decoder) unmarshalMessage(m pref.Message, skipTypeURL bool) error {
+	if unmarshal := wellKnownTypeUnmarshaler(m.Descriptor().FullName()); unmarshal != nil {
+		return unmarshal(d, m)
+	}
+
+	tok, err := d.Read()
+	if err != nil {
+		return err
+	}
+	if tok.Kind() != json.ObjectOpen {
+		return d.unexpectedTokenError(tok)
+	}
+
+	messageDesc := m.Descriptor()
+	if !flags.ProtoLegacy && messageset.IsMessageSet(messageDesc) {
+		return errors.New("no support for proto1 MessageSets")
+	}
+
+	var seenNums set.Ints
+	var seenOneofs set.Ints
+	fieldDescs := messageDesc.Fields()
+	for {
+		// Read field name.
+		tok, err := d.Read()
+		if err != nil {
+			return err
+		}
+		switch tok.Kind() {
+		default:
+			return d.unexpectedTokenError(tok)
+		case json.ObjectClose:
+			return nil
+		case json.Name:
+			// Continue below.
+		}
+
+		name := tok.Name()
+		// Unmarshaling a non-custom embedded message in Any will contain the
+		// JSON field "@type" which should be skipped because it is not a field
+		// of the embedded message, but simply an artifact of the Any format.
+		if skipTypeURL && name == "@type" {
+			d.Read()
+			continue
+		}
+
+		// Get the FieldDescriptor.
+		var fd pref.FieldDescriptor
+		if strings.HasPrefix(name, "[") && strings.HasSuffix(name, "]") {
+			// Only extension names are in [name] format.
+			extName := pref.FullName(name[1 : len(name)-1])
+			extType, err := d.opts.Resolver.FindExtensionByName(extName)
+			if err != nil && err != protoregistry.NotFound {
+				return d.newError(tok.Pos(), "unable to resolve %s: %v", tok.RawString(), err)
+			}
+			if extType != nil {
+				fd = extType.TypeDescriptor()
+				if !messageDesc.ExtensionRanges().Has(fd.Number()) || fd.ContainingMessage().FullName() != messageDesc.FullName() {
+					return d.newError(tok.Pos(), "message %v cannot be extended by %v", messageDesc.FullName(), fd.FullName())
+				}
+			}
+		} else {
+			// The name can either be the JSON name or the proto field name.
+			fd = fieldDescs.ByJSONName(name)
+			if fd == nil {
+				fd = fieldDescs.ByTextName(name)
+			}
+		}
+		if flags.ProtoLegacy {
+			if fd != nil && fd.IsWeak() && fd.Message().IsPlaceholder() {
+				fd = nil // reset since the weak reference is not linked in
+			}
+		}
+
+		if fd == nil {
+			// Field is unknown.
+			if d.opts.DiscardUnknown {
+				if err := d.skipJSONValue(); err != nil {
+					return err
+				}
+				continue
+			}
+			return d.newError(tok.Pos(), "unknown field %v", tok.RawString())
+		}
+
+		// Do not allow duplicate fields.
+		num := uint64(fd.Number())
+		if seenNums.Has(num) {
+			return d.newError(tok.Pos(), "duplicate field %v", tok.RawString())
+		}
+		seenNums.Set(num)
+
+		// No need to set values for JSON null unless the field type is
+		// google.protobuf.Value or google.protobuf.NullValue.
+		if tok, _ := d.Peek(); tok.Kind() == json.Null && !isKnownValue(fd) && !isNullValue(fd) {
+			d.Read()
+			continue
+		}
+
+		switch {
+		case fd.IsList():
+			list := m.Mutable(fd).List()
+			if err := d.unmarshalList(list, fd); err != nil {
+				return err
+			}
+		case fd.IsMap():
+			mmap := m.Mutable(fd).Map()
+			if err := d.unmarshalMap(mmap, fd); err != nil {
+				return err
+			}
+		default:
+			// If field is a oneof, check if it has already been set.
+			if od := fd.ContainingOneof(); od != nil {
+				idx := uint64(od.Index())
+				if seenOneofs.Has(idx) {
+					return d.newError(tok.Pos(), "error parsing %s, oneof %v is already set", tok.RawString(), od.FullName())
+				}
+				seenOneofs.Set(idx)
+			}
+
+			// Required or optional fields.
+			if err := d.unmarshalSingular(m, fd); err != nil {
+				return err
+			}
+		}
+	}
+}
+
+func isKnownValue(fd pref.FieldDescriptor) bool {
+	md := fd.Message()
+	return md != nil && md.FullName() == genid.Value_message_fullname
+}
+
+func isNullValue(fd pref.FieldDescriptor) bool {
+	ed := fd.Enum()
+	return ed != nil && ed.FullName() == genid.NullValue_enum_fullname
+}
+
+// unmarshalSingular unmarshals to the non-repeated field specified
+// by the given FieldDescriptor.
+func (d decoder) unmarshalSingular(m pref.Message, fd pref.FieldDescriptor) error {
+	var val pref.Value
+	var err error
+	switch fd.Kind() {
+	case pref.MessageKind, pref.GroupKind:
+		val = m.NewField(fd)
+		err = d.unmarshalMessage(val.Message(), false)
+	default:
+		val, err = d.unmarshalScalar(fd)
+	}
+
+	if err != nil {
+		return err
+	}
+	m.Set(fd, val)
+	return nil
+}
+
+// unmarshalScalar unmarshals to a scalar/enum protoreflect.Value specified by
+// the given FieldDescriptor.
+func (d decoder) unmarshalScalar(fd pref.FieldDescriptor) (pref.Value, error) {
+	const b32 int = 32
+	const b64 int = 64
+
+	tok, err := d.Read()
+	if err != nil {
+		return pref.Value{}, err
+	}
+
+	kind := fd.Kind()
+	switch kind {
+	case pref.BoolKind:
+		if tok.Kind() == json.Bool {
+			return pref.ValueOfBool(tok.Bool()), nil
+		}
+
+	case pref.Int32Kind, pref.Sint32Kind, pref.Sfixed32Kind:
+		if v, ok := unmarshalInt(tok, b32); ok {
+			return v, nil
+		}
+
+	case pref.Int64Kind, pref.Sint64Kind, pref.Sfixed64Kind:
+		if v, ok := unmarshalInt(tok, b64); ok {
+			return v, nil
+		}
+
+	case pref.Uint32Kind, pref.Fixed32Kind:
+		if v, ok := unmarshalUint(tok, b32); ok {
+			return v, nil
+		}
+
+	case pref.Uint64Kind, pref.Fixed64Kind:
+		if v, ok := unmarshalUint(tok, b64); ok {
+			return v, nil
+		}
+
+	case pref.FloatKind:
+		if v, ok := unmarshalFloat(tok, b32); ok {
+			return v, nil
+		}
+
+	case pref.DoubleKind:
+		if v, ok := unmarshalFloat(tok, b64); ok {
+			return v, nil
+		}
+
+	case pref.StringKind:
+		if tok.Kind() == json.String {
+			return pref.ValueOfString(tok.ParsedString()), nil
+		}
+
+	case pref.BytesKind:
+		if v, ok := unmarshalBytes(tok); ok {
+			return v, nil
+		}
+
+	case pref.EnumKind:
+		if v, ok := unmarshalEnum(tok, fd); ok {
+			return v, nil
+		}
+
+	default:
+		panic(fmt.Sprintf("unmarshalScalar: invalid scalar kind %v", kind))
+	}
+
+	return pref.Value{}, d.newError(tok.Pos(), "invalid value for %v type: %v", kind, tok.RawString())
+}
+
+func unmarshalInt(tok json.Token, bitSize int) (pref.Value, bool) {
+	switch tok.Kind() {
+	case json.Number:
+		return getInt(tok, bitSize)
+
+	case json.String:
+		// Decode number from string.
+		s := strings.TrimSpace(tok.ParsedString())
+		if len(s) != len(tok.ParsedString()) {
+			return pref.Value{}, false
+		}
+		dec := json.NewDecoder([]byte(s))
+		tok, err := dec.Read()
+		if err != nil {
+			return pref.Value{}, false
+		}
+		return getInt(tok, bitSize)
+	}
+	return pref.Value{}, false
+}
+
+func getInt(tok json.Token, bitSize int) (pref.Value, bool) {
+	n, ok := tok.Int(bitSize)
+	if !ok {
+		return pref.Value{}, false
+	}
+	if bitSize == 32 {
+		return pref.ValueOfInt32(int32(n)), true
+	}
+	return pref.ValueOfInt64(n), true
+}
+
+func unmarshalUint(tok json.Token, bitSize int) (pref.Value, bool) {
+	switch tok.Kind() {
+	case json.Number:
+		return getUint(tok, bitSize)
+
+	case json.String:
+		// Decode number from string.
+		s := strings.TrimSpace(tok.ParsedString())
+		if len(s) != len(tok.ParsedString()) {
+			return pref.Value{}, false
+		}
+		dec := json.NewDecoder([]byte(s))
+		tok, err := dec.Read()
+		if err != nil {
+			return pref.Value{}, false
+		}
+		return getUint(tok, bitSize)
+	}
+	return pref.Value{}, false
+}
+
+func getUint(tok json.Token, bitSize int) (pref.Value, bool) {
+	n, ok := tok.Uint(bitSize)
+	if !ok {
+		return pref.Value{}, false
+	}
+	if bitSize == 32 {
+		return pref.ValueOfUint32(uint32(n)), true
+	}
+	return pref.ValueOfUint64(n), true
+}
+
+func unmarshalFloat(tok json.Token, bitSize int) (pref.Value, bool) {
+	switch tok.Kind() {
+	case json.Number:
+		return getFloat(tok, bitSize)
+
+	case json.String:
+		s := tok.ParsedString()
+		switch s {
+		case "NaN":
+			if bitSize == 32 {
+				return pref.ValueOfFloat32(float32(math.NaN())), true
+			}
+			return pref.ValueOfFloat64(math.NaN()), true
+		case "Infinity":
+			if bitSize == 32 {
+				return pref.ValueOfFloat32(float32(math.Inf(+1))), true
+			}
+			return pref.ValueOfFloat64(math.Inf(+1)), true
+		case "-Infinity":
+			if bitSize == 32 {
+				return pref.ValueOfFloat32(float32(math.Inf(-1))), true
+			}
+			return pref.ValueOfFloat64(math.Inf(-1)), true
+		}
+
+		// Decode number from string.
+		if len(s) != len(strings.TrimSpace(s)) {
+			return pref.Value{}, false
+		}
+		dec := json.NewDecoder([]byte(s))
+		tok, err := dec.Read()
+		if err != nil {
+			return pref.Value{}, false
+		}
+		return getFloat(tok, bitSize)
+	}
+	return pref.Value{}, false
+}
+
+func getFloat(tok json.Token, bitSize int) (pref.Value, bool) {
+	n, ok := tok.Float(bitSize)
+	if !ok {
+		return pref.Value{}, false
+	}
+	if bitSize == 32 {
+		return pref.ValueOfFloat32(float32(n)), true
+	}
+	return pref.ValueOfFloat64(n), true
+}
+
+func unmarshalBytes(tok json.Token) (pref.Value, bool) {
+	if tok.Kind() != json.String {
+		return pref.Value{}, false
+	}
+
+	s := tok.ParsedString()
+	enc := base64.StdEncoding
+	if strings.ContainsAny(s, "-_") {
+		enc = base64.URLEncoding
+	}
+	if len(s)%4 != 0 {
+		enc = enc.WithPadding(base64.NoPadding)
+	}
+	b, err := enc.DecodeString(s)
+	if err != nil {
+		return pref.Value{}, false
+	}
+	return pref.ValueOfBytes(b), true
+}
+
+func unmarshalEnum(tok json.Token, fd pref.FieldDescriptor) (pref.Value, bool) {
+	switch tok.Kind() {
+	case json.String:
+		// Lookup EnumNumber based on name.
+		s := tok.ParsedString()
+		if enumVal := fd.Enum().Values().ByName(pref.Name(s)); enumVal != nil {
+			return pref.ValueOfEnum(enumVal.Number()), true
+		}
+
+	case json.Number:
+		if n, ok := tok.Int(32); ok {
+			return pref.ValueOfEnum(pref.EnumNumber(n)), true
+		}
+
+	case json.Null:
+		// This is only valid for google.protobuf.NullValue.
+		if isNullValue(fd) {
+			return pref.ValueOfEnum(0), true
+		}
+	}
+
+	return pref.Value{}, false
+}
+
+func (d decoder) unmarshalList(list pref.List, fd pref.FieldDescriptor) error {
+	tok, err := d.Read()
+	if err != nil {
+		return err
+	}
+	if tok.Kind() != json.ArrayOpen {
+		return d.unexpectedTokenError(tok)
+	}
+
+	switch fd.Kind() {
+	case pref.MessageKind, pref.GroupKind:
+		for {
+			tok, err := d.Peek()
+			if err != nil {
+				return err
+			}
+
+			if tok.Kind() == json.ArrayClose {
+				d.Read()
+				return nil
+			}
+
+			val := list.NewElement()
+			if err := d.unmarshalMessage(val.Message(), false); err != nil {
+				return err
+			}
+			list.Append(val)
+		}
+	default:
+		for {
+			tok, err := d.Peek()
+			if err != nil {
+				return err
+			}
+
+			if tok.Kind() == json.ArrayClose {
+				d.Read()
+				return nil
+			}
+
+			val, err := d.unmarshalScalar(fd)
+			if err != nil {
+				return err
+			}
+			list.Append(val)
+		}
+	}
+
+	return nil
+}
+
+func (d decoder) unmarshalMap(mmap pref.Map, fd pref.FieldDescriptor) error {
+	tok, err := d.Read()
+	if err != nil {
+		return err
+	}
+	if tok.Kind() != json.ObjectOpen {
+		return d.unexpectedTokenError(tok)
+	}
+
+	// Determine ahead whether map entry is a scalar type or a message type in
+	// order to call the appropriate unmarshalMapValue func inside the for loop
+	// below.
+	var unmarshalMapValue func() (pref.Value, error)
+	switch fd.MapValue().Kind() {
+	case pref.MessageKind, pref.GroupKind:
+		unmarshalMapValue = func() (pref.Value, error) {
+			val := mmap.NewValue()
+			if err := d.unmarshalMessage(val.Message(), false); err != nil {
+				return pref.Value{}, err
+			}
+			return val, nil
+		}
+	default:
+		unmarshalMapValue = func() (pref.Value, error) {
+			return d.unmarshalScalar(fd.MapValue())
+		}
+	}
+
+Loop:
+	for {
+		// Read field name.
+		tok, err := d.Read()
+		if err != nil {
+			return err
+		}
+		switch tok.Kind() {
+		default:
+			return d.unexpectedTokenError(tok)
+		case json.ObjectClose:
+			break Loop
+		case json.Name:
+			// Continue.
+		}
+
+		// Unmarshal field name.
+		pkey, err := d.unmarshalMapKey(tok, fd.MapKey())
+		if err != nil {
+			return err
+		}
+
+		// Check for duplicate field name.
+		if mmap.Has(pkey) {
+			return d.newError(tok.Pos(), "duplicate map key %v", tok.RawString())
+		}
+
+		// Read and unmarshal field value.
+		pval, err := unmarshalMapValue()
+		if err != nil {
+			return err
+		}
+
+		mmap.Set(pkey, pval)
+	}
+
+	return nil
+}
+
+// unmarshalMapKey converts given token of Name kind into a protoreflect.MapKey.
+// A map key type is any integral or string type.
+func (d decoder) unmarshalMapKey(tok json.Token, fd pref.FieldDescriptor) (pref.MapKey, error) {
+	const b32 = 32
+	const b64 = 64
+	const base10 = 10
+
+	name := tok.Name()
+	kind := fd.Kind()
+	switch kind {
+	case pref.StringKind:
+		return pref.ValueOfString(name).MapKey(), nil
+
+	case pref.BoolKind:
+		switch name {
+		case "true":
+			return pref.ValueOfBool(true).MapKey(), nil
+		case "false":
+			return pref.ValueOfBool(false).MapKey(), nil
+		}
+
+	case pref.Int32Kind, pref.Sint32Kind, pref.Sfixed32Kind:
+		if n, err := strconv.ParseInt(name, base10, b32); err == nil {
+			return pref.ValueOfInt32(int32(n)).MapKey(), nil
+		}
+
+	case pref.Int64Kind, pref.Sint64Kind, pref.Sfixed64Kind:
+		if n, err := strconv.ParseInt(name, base10, b64); err == nil {
+			return pref.ValueOfInt64(int64(n)).MapKey(), nil
+		}
+
+	case pref.Uint32Kind, pref.Fixed32Kind:
+		if n, err := strconv.ParseUint(name, base10, b32); err == nil {
+			return pref.ValueOfUint32(uint32(n)).MapKey(), nil
+		}
+
+	case pref.Uint64Kind, pref.Fixed64Kind:
+		if n, err := strconv.ParseUint(name, base10, b64); err == nil {
+			return pref.ValueOfUint64(uint64(n)).MapKey(), nil
+		}
+
+	default:
+		panic(fmt.Sprintf("invalid kind for map key: %v", kind))
+	}
+
+	return pref.MapKey{}, d.newError(tok.Pos(), "invalid value for %v key: %s", kind, tok.RawString())
+}
diff --git a/vendor/google.golang.org/protobuf/encoding/protojson/doc.go b/vendor/google.golang.org/protobuf/encoding/protojson/doc.go
new file mode 100644
index 000000000..00ea2fecf
--- /dev/null
+++ b/vendor/google.golang.org/protobuf/encoding/protojson/doc.go
@@ -0,0 +1,11 @@
+// Copyright 2019 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package protojson marshals and unmarshals protocol buffer messages as JSON
+// format. It follows the guide at
+// https://developers.google.com/protocol-buffers/docs/proto3#json.
+//
+// This package produces a different output than the standard "encoding/json"
+// package, which does not operate correctly on protocol buffer messages.
+package protojson
diff --git a/vendor/google.golang.org/protobuf/encoding/protojson/encode.go b/vendor/google.golang.org/protobuf/encoding/protojson/encode.go
new file mode 100644
index 000000000..ba971f078
--- /dev/null
+++ b/vendor/google.golang.org/protobuf/encoding/protojson/encode.go
@@ -0,0 +1,344 @@
+// Copyright 2019 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package protojson
+
+import (
+	"encoding/base64"
+	"fmt"
+
+	"google.golang.org/protobuf/internal/encoding/json"
+	"google.golang.org/protobuf/internal/encoding/messageset"
+	"google.golang.org/protobuf/internal/errors"
+	"google.golang.org/protobuf/internal/filedesc"
+	"google.golang.org/protobuf/internal/flags"
+	"google.golang.org/protobuf/internal/genid"
+	"google.golang.org/protobuf/internal/order"
+	"google.golang.org/protobuf/internal/pragma"
+	"google.golang.org/protobuf/proto"
+	"google.golang.org/protobuf/reflect/protoreflect"
+	pref "google.golang.org/protobuf/reflect/protoreflect"
+	"google.golang.org/protobuf/reflect/protoregistry"
+)
+
+const defaultIndent = "  "
+
+// Format formats the message as a multiline string.
+// This function is only intended for human consumption and ignores errors.
+// Do not depend on the output being stable. It may change over time across
+// different versions of the program.
+func Format(m proto.Message) string {
+	return MarshalOptions{Multiline: true}.Format(m)
+}
+
+// Marshal writes the given proto.Message in JSON format using default options.
+// Do not depend on the output being stable. It may change over time across
+// different versions of the program.
+func Marshal(m proto.Message) ([]byte, error) {
+	return MarshalOptions{}.Marshal(m)
+}
+
+// MarshalOptions is a configurable JSON format marshaler.
+type MarshalOptions struct {
+	pragma.NoUnkeyedLiterals
+
+	// Multiline specifies whether the marshaler should format the output in
+	// indented-form with every textual element on a new line.
+	// If Indent is an empty string, then an arbitrary indent is chosen.
+	Multiline bool
+
+	// Indent specifies the set of indentation characters to use in a multiline
+	// formatted output such that every entry is preceded by Indent and
+	// terminated by a newline. If non-empty, then Multiline is treated as true.
+	// Indent can only be composed of space or tab characters.
+	Indent string
+
+	// AllowPartial allows messages that have missing required fields to marshal
+	// without returning an error. If AllowPartial is false (the default),
+	// Marshal will return error if there are any missing required fields.
+	AllowPartial bool
+
+	// UseProtoNames uses proto field name instead of lowerCamelCase name in JSON
+	// field names.
+	UseProtoNames bool
+
+	// UseEnumNumbers emits enum values as numbers.
+	UseEnumNumbers bool
+
+	// EmitUnpopulated specifies whether to emit unpopulated fields. It does not
+	// emit unpopulated oneof fields or unpopulated extension fields.
+	// The JSON value emitted for unpopulated fields are as follows:
+	//  ╔═══════╤════════════════════════════╗
+	//  ║ JSON  │ Protobuf field             ║
+	//  ╠═══════╪════════════════════════════╣
+	//  ║ false │ proto3 boolean fields      ║
+	//  ║ 0     │ proto3 numeric fields      ║
+	//  ║ ""    │ proto3 string/bytes fields ║
+	//  ║ null  │ proto2 scalar fields       ║
+	//  ║ null  │ message fields             ║
+	//  ║ []    │ list fields                ║
+	//  ║ {}    │ map fields                 ║
+	//  ╚═══════╧════════════════════════════╝
+	EmitUnpopulated bool
+
+	// Resolver is used for looking up types when expanding google.protobuf.Any
+	// messages. If nil, this defaults to using protoregistry.GlobalTypes.
+	Resolver interface {
+		protoregistry.ExtensionTypeResolver
+		protoregistry.MessageTypeResolver
+	}
+}
+
+// Format formats the message as a string.
+// This method is only intended for human consumption and ignores errors.
+// Do not depend on the output being stable. It may change over time across
+// different versions of the program.
+func (o MarshalOptions) Format(m proto.Message) string {
+	if m == nil || !m.ProtoReflect().IsValid() {
+		return "<nil>" // invalid syntax, but okay since this is for debugging
+	}
+	o.AllowPartial = true
+	b, _ := o.Marshal(m)
+	return string(b)
+}
+
+// Marshal marshals the given proto.Message in the JSON format using options in
+// MarshalOptions. Do not depend on the output being stable. It may change over
+// time across different versions of the program.
+func (o MarshalOptions) Marshal(m proto.Message) ([]byte, error) {
+	return o.marshal(m)
+}
+
+// marshal is a centralized function that all marshal operations go through.
+// For profiling purposes, avoid changing the name of this function or
+// introducing other code paths for marshal that do not go through this.
+func (o MarshalOptions) marshal(m proto.Message) ([]byte, error) {
+	if o.Multiline && o.Indent == "" {
+		o.Indent = defaultIndent
+	}
+	if o.Resolver == nil {
+		o.Resolver = protoregistry.GlobalTypes
+	}
+
+	internalEnc, err := json.NewEncoder(o.Indent)
+	if err != nil {
+		return nil, err
+	}
+
+	// Treat nil message interface as an empty message,
+	// in which case the output in an empty JSON object.
+	if m == nil {
+		return []byte("{}"), nil
+	}
+
+	enc := encoder{internalEnc, o}
+	if err := enc.marshalMessage(m.ProtoReflect(), ""); err != nil {
+		return nil, err
+	}
+	if o.AllowPartial {
+		return enc.Bytes(), nil
+	}
+	return enc.Bytes(), proto.CheckInitialized(m)
+}
+
+type encoder struct {
+	*json.Encoder
+	opts MarshalOptions
+}
+
+// typeFieldDesc is a synthetic field descriptor used for the "@type" field.
+var typeFieldDesc = func() protoreflect.FieldDescriptor {
+	var fd filedesc.Field
+	fd.L0.FullName = "@type"
+	fd.L0.Index = -1
+	fd.L1.Cardinality = protoreflect.Optional
+	fd.L1.Kind = protoreflect.StringKind
+	return &fd
+}()
+
+// typeURLFieldRanger wraps a protoreflect.Message and modifies its Range method
+// to additionally iterate over a synthetic field for the type URL.
+type typeURLFieldRanger struct {
+	order.FieldRanger
+	typeURL string
+}
+
+func (m typeURLFieldRanger) Range(f func(pref.FieldDescriptor, pref.Value) bool) {
+	if !f(typeFieldDesc, pref.ValueOfString(m.typeURL)) {
+		return
+	}
+	m.FieldRanger.Range(f)
+}
+
+// unpopulatedFieldRanger wraps a protoreflect.Message and modifies its Range
+// method to additionally iterate over unpopulated fields.
+type unpopulatedFieldRanger struct{ pref.Message }
+
+func (m unpopulatedFieldRanger) Range(f func(pref.FieldDescriptor, pref.Value) bool) {
+	fds := m.Descriptor().Fields()
+	for i := 0; i < fds.Len(); i++ {
+		fd := fds.Get(i)
+		if m.Has(fd) || fd.ContainingOneof() != nil {
+			continue // ignore populated fields and fields within a oneofs
+		}
+
+		v := m.Get(fd)
+		isProto2Scalar := fd.Syntax() == pref.Proto2 && fd.Default().IsValid()
+		isSingularMessage := fd.Cardinality() != pref.Repeated && fd.Message() != nil
+		if isProto2Scalar || isSingularMessage {
+			v = pref.Value{} // use invalid value to emit null
+		}
+		if !f(fd, v) {
+			return
+		}
+	}
+	m.Message.Range(f)
+}
+
+// marshalMessage marshals the fields in the given protoreflect.Message.
+// If the typeURL is non-empty, then a synthetic "@type" field is injected
+// containing the URL as the value.
+func (e encoder) marshalMessage(m pref.Message, typeURL string) error {
+	if !flags.ProtoLegacy && messageset.IsMessageSet(m.Descriptor()) {
+		return errors.New("no support for proto1 MessageSets")
+	}
+
+	if marshal := wellKnownTypeMarshaler(m.Descriptor().FullName()); marshal != nil {
+		return marshal(e, m)
+	}
+
+	e.StartObject()
+	defer e.EndObject()
+
+	var fields order.FieldRanger = m
+	if e.opts.EmitUnpopulated {
+		fields = unpopulatedFieldRanger{m}
+	}
+	if typeURL != "" {
+		fields = typeURLFieldRanger{fields, typeURL}
+	}
+
+	var err error
+	order.RangeFields(fields, order.IndexNameFieldOrder, func(fd pref.FieldDescriptor, v pref.Value) bool {
+		name := fd.JSONName()
+		if e.opts.UseProtoNames {
+			name = fd.TextName()
+		}
+
+		if err = e.WriteName(name); err != nil {
+			return false
+		}
+		if err = e.marshalValue(v, fd); err != nil {
+			return false
+		}
+		return true
+	})
+	return err
+}
+
+// marshalValue marshals the given protoreflect.Value.
+func (e encoder) marshalValue(val pref.Value, fd pref.FieldDescriptor) error {
+	switch {
+	case fd.IsList():
+		return e.marshalList(val.List(), fd)
+	case fd.IsMap():
+		return e.marshalMap(val.Map(), fd)
+	default:
+		return e.marshalSingular(val, fd)
+	}
+}
+
+// marshalSingular marshals the given non-repeated field value. This includes
+// all scalar types, enums, messages, and groups.
+func (e encoder) marshalSingular(val pref.Value, fd pref.FieldDescriptor) error {
+	if !val.IsValid() {
+		e.WriteNull()
+		return nil
+	}
+
+	switch kind := fd.Kind(); kind {
+	case pref.BoolKind:
+		e.WriteBool(val.Bool())
+
+	case pref.StringKind:
+		if e.WriteString(val.String()) != nil {
+			return errors.InvalidUTF8(string(fd.FullName()))
+		}
+
+	case pref.Int32Kind, pref.Sint32Kind, pref.Sfixed32Kind:
+		e.WriteInt(val.Int())
+
+	case pref.Uint32Kind, pref.Fixed32Kind:
+		e.WriteUint(val.Uint())
+
+	case pref.Int64Kind, pref.Sint64Kind, pref.Uint64Kind,
+		pref.Sfixed64Kind, pref.Fixed64Kind:
+		// 64-bit integers are written out as JSON string.
+		e.WriteString(val.String())
+
+	case pref.FloatKind:
+		// Encoder.WriteFloat handles the special numbers NaN and infinites.
+		e.WriteFloat(val.Float(), 32)
+
+	case pref.DoubleKind:
+		// Encoder.WriteFloat handles the special numbers NaN and infinites.
+		e.WriteFloat(val.Float(), 64)
+
+	case pref.BytesKind:
+		e.WriteString(base64.StdEncoding.EncodeToString(val.Bytes()))
+
+	case pref.EnumKind:
+		if fd.Enum().FullName() == genid.NullValue_enum_fullname {
+			e.WriteNull()
+		} else {
+			desc := fd.Enum().Values().ByNumber(val.Enum())
+			if e.opts.UseEnumNumbers || desc == nil {
+				e.WriteInt(int64(val.Enum()))
+			} else {
+				e.WriteString(string(desc.Name()))
+			}
+		}
+
+	case pref.MessageKind, pref.GroupKind:
+		if err := e.marshalMessage(val.Message(), ""); err != nil {
+			return err
+		}
+
+	default:
+		panic(fmt.Sprintf("%v has unknown kind: %v", fd.FullName(), kind))
+	}
+	return nil
+}
+
+// marshalList marshals the given protoreflect.List.
+func (e encoder) marshalList(list pref.List, fd pref.FieldDescriptor) error {
+	e.StartArray()
+	defer e.EndArray()
+
+	for i := 0; i < list.Len(); i++ {
+		item := list.Get(i)
+		if err := e.marshalSingular(item, fd); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// marshalMap marshals given protoreflect.Map.
+func (e encoder) marshalMap(mmap pref.Map, fd pref.FieldDescriptor) error {
+	e.StartObject()
+	defer e.EndObject()
+
+	var err error
+	order.RangeEntries(mmap, order.GenericKeyOrder, func(k pref.MapKey, v pref.Value) bool {
+		if err = e.WriteName(k.String()); err != nil {
+			return false
+		}
+		if err = e.marshalSingular(v, fd.MapValue()); err != nil {
+			return false
+		}
+		return true
+	})
+	return err
+}
diff --git a/vendor/google.golang.org/protobuf/encoding/protojson/well_known_types.go b/vendor/google.golang.org/protobuf/encoding/protojson/well_known_types.go
new file mode 100644
index 000000000..72924a905
--- /dev/null
+++ b/vendor/google.golang.org/protobuf/encoding/protojson/well_known_types.go
@@ -0,0 +1,889 @@
+// Copyright 2019 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package protojson
+
+import (
+	"bytes"
+	"fmt"
+	"math"
+	"strconv"
+	"strings"
+	"time"
+
+	"google.golang.org/protobuf/internal/encoding/json"
+	"google.golang.org/protobuf/internal/errors"
+	"google.golang.org/protobuf/internal/genid"
+	"google.golang.org/protobuf/internal/strs"
+	"google.golang.org/protobuf/proto"
+	pref "google.golang.org/protobuf/reflect/protoreflect"
+)
+
+type marshalFunc func(encoder, pref.Message) error
+
+// wellKnownTypeMarshaler returns a marshal function if the message type
+// has specialized serialization behavior. It returns nil otherwise.
+func wellKnownTypeMarshaler(name pref.FullName) marshalFunc {
+	if name.Parent() == genid.GoogleProtobuf_package {
+		switch name.Name() {
+		case genid.Any_message_name:
+			return encoder.marshalAny
+		case genid.Timestamp_message_name:
+			return encoder.marshalTimestamp
+		case genid.Duration_message_name:
+			return encoder.marshalDuration
+		case genid.BoolValue_message_name,
+			genid.Int32Value_message_name,
+			genid.Int64Value_message_name,
+			genid.UInt32Value_message_name,
+			genid.UInt64Value_message_name,
+			genid.FloatValue_message_name,
+			genid.DoubleValue_message_name,
+			genid.StringValue_message_name,
+			genid.BytesValue_message_name:
+			return encoder.marshalWrapperType
+		case genid.Struct_message_name:
+			return encoder.marshalStruct
+		case genid.ListValue_message_name:
+			return encoder.marshalListValue
+		case genid.Value_message_name:
+			return encoder.marshalKnownValue
+		case genid.FieldMask_message_name:
+			return encoder.marshalFieldMask
+		case genid.Empty_message_name:
+			return encoder.marshalEmpty
+		}
+	}
+	return nil
+}
+
+type unmarshalFunc func(decoder, pref.Message) error
+
+// wellKnownTypeUnmarshaler returns a unmarshal function if the message type
+// has specialized serialization behavior. It returns nil otherwise.
+func wellKnownTypeUnmarshaler(name pref.FullName) unmarshalFunc {
+	if name.Parent() == genid.GoogleProtobuf_package {
+		switch name.Name() {
+		case genid.Any_message_name:
+			return decoder.unmarshalAny
+		case genid.Timestamp_message_name:
+			return decoder.unmarshalTimestamp
+		case genid.Duration_message_name:
+			return decoder.unmarshalDuration
+		case genid.BoolValue_message_name,
+			genid.Int32Value_message_name,
+			genid.Int64Value_message_name,
+			genid.UInt32Value_message_name,
+			genid.UInt64Value_message_name,
+			genid.FloatValue_message_name,
+			genid.DoubleValue_message_name,
+			genid.StringValue_message_name,
+			genid.BytesValue_message_name:
+			return decoder.unmarshalWrapperType
+		case genid.Struct_message_name:
+			return decoder.unmarshalStruct
+		case genid.ListValue_message_name:
+			return decoder.unmarshalListValue
+		case genid.Value_message_name:
+			return decoder.unmarshalKnownValue
+		case genid.FieldMask_message_name:
+			return decoder.unmarshalFieldMask
+		case genid.Empty_message_name:
+			return decoder.unmarshalEmpty
+		}
+	}
+	return nil
+}
+
+// The JSON representation of an Any message uses the regular representation of
+// the deserialized, embedded message, with an additional field `@type` which
+// contains the type URL. If the embedded message type is well-known and has a
+// custom JSON representation, that representation will be embedded adding a
+// field `value` which holds the custom JSON in addition to the `@type` field.
+
+func (e encoder) marshalAny(m pref.Message) error {
+	fds := m.Descriptor().Fields()
+	fdType := fds.ByNumber(genid.Any_TypeUrl_field_number)
+	fdValue := fds.ByNumber(genid.Any_Value_field_number)
+
+	if !m.Has(fdType) {
+		if !m.Has(fdValue) {
+			// If message is empty, marshal out empty JSON object.
+			e.StartObject()
+			e.EndObject()
+			return nil
+		} else {
+			// Return error if type_url field is not set, but value is set.
+			return errors.New("%s: %v is not set", genid.Any_message_fullname, genid.Any_TypeUrl_field_name)
+		}
+	}
+
+	typeVal := m.Get(fdType)
+	valueVal := m.Get(fdValue)
+
+	// Resolve the type in order to unmarshal value field.
+	typeURL := typeVal.String()
+	emt, err := e.opts.Resolver.FindMessageByURL(typeURL)
+	if err != nil {
+		return errors.New("%s: unable to resolve %q: %v", genid.Any_message_fullname, typeURL, err)
+	}
+
+	em := emt.New()
+	err = proto.UnmarshalOptions{
+		AllowPartial: true, // never check required fields inside an Any
+		Resolver:     e.opts.Resolver,
+	}.Unmarshal(valueVal.Bytes(), em.Interface())
+	if err != nil {
+		return errors.New("%s: unable to unmarshal %q: %v", genid.Any_message_fullname, typeURL, err)
+	}
+
+	// If type of value has custom JSON encoding, marshal out a field "value"
+	// with corresponding custom JSON encoding of the embedded message as a
+	// field.
+	if marshal := wellKnownTypeMarshaler(emt.Descriptor().FullName()); marshal != nil {
+		e.StartObject()
+		defer e.EndObject()
+
+		// Marshal out @type field.
+		e.WriteName("@type")
+		if err := e.WriteString(typeURL); err != nil {
+			return err
+		}
+
+		e.WriteName("value")
+		return marshal(e, em)
+	}
+
+	// Else, marshal out the embedded message's fields in this Any object.
+	if err := e.marshalMessage(em, typeURL); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func (d decoder) unmarshalAny(m pref.Message) error {
+	// Peek to check for json.ObjectOpen to avoid advancing a read.
+	start, err := d.Peek()
+	if err != nil {
+		return err
+	}
+	if start.Kind() != json.ObjectOpen {
+		return d.unexpectedTokenError(start)
+	}
+
+	// Use another decoder to parse the unread bytes for @type field. This
+	// avoids advancing a read from current decoder because the current JSON
+	// object may contain the fields of the embedded type.
+	dec := decoder{d.Clone(), UnmarshalOptions{}}
+	tok, err := findTypeURL(dec)
+	switch err {
+	case errEmptyObject:
+		// An empty JSON object translates to an empty Any message.
+		d.Read() // Read json.ObjectOpen.
+		d.Read() // Read json.ObjectClose.
+		return nil
+
+	case errMissingType:
+		if d.opts.DiscardUnknown {
+			// Treat all fields as unknowns, similar to an empty object.
+			return d.skipJSONValue()
+		}
+		// Use start.Pos() for line position.
+		return d.newError(start.Pos(), err.Error())
+
+	default:
+		if err != nil {
+			return err
+		}
+	}
+
+	typeURL := tok.ParsedString()
+	emt, err := d.opts.Resolver.FindMessageByURL(typeURL)
+	if err != nil {
+		return d.newError(tok.Pos(), "unable to resolve %v: %q", tok.RawString(), err)
+	}
+
+	// Create new message for the embedded message type and unmarshal into it.
+	em := emt.New()
+	if unmarshal := wellKnownTypeUnmarshaler(emt.Descriptor().FullName()); unmarshal != nil {
+		// If embedded message is a custom type,
+		// unmarshal the JSON "value" field into it.
+		if err := d.unmarshalAnyValue(unmarshal, em); err != nil {
+			return err
+		}
+	} else {
+		// Else unmarshal the current JSON object into it.
+		if err := d.unmarshalMessage(em, true); err != nil {
+			return err
+		}
+	}
+	// Serialize the embedded message and assign the resulting bytes to the
+	// proto value field.
+	b, err := proto.MarshalOptions{
+		AllowPartial:  true, // No need to check required fields inside an Any.
+		Deterministic: true,
+	}.Marshal(em.Interface())
+	if err != nil {
+		return d.newError(start.Pos(), "error in marshaling Any.value field: %v", err)
+	}
+
+	fds := m.Descriptor().Fields()
+	fdType := fds.ByNumber(genid.Any_TypeUrl_field_number)
+	fdValue := fds.ByNumber(genid.Any_Value_field_number)
+
+	m.Set(fdType, pref.ValueOfString(typeURL))
+	m.Set(fdValue, pref.ValueOfBytes(b))
+	return nil
+}
+
+var errEmptyObject = fmt.Errorf(`empty object`)
+var errMissingType = fmt.Errorf(`missing "@type" field`)
+
+// findTypeURL returns the token for the "@type" field value from the given
+// JSON bytes. It is expected that the given bytes start with json.ObjectOpen.
+// It returns errEmptyObject if the JSON object is empty or errMissingType if
+// @type field does not exist. It returns other error if the @type field is not
+// valid or other decoding issues.
+func findTypeURL(d decoder) (json.Token, error) {
+	var typeURL string
+	var typeTok json.Token
+	numFields := 0
+	// Skip start object.
+	d.Read()
+
+Loop:
+	for {
+		tok, err := d.Read()
+		if err != nil {
+			return json.Token{}, err
+		}
+
+		switch tok.Kind() {
+		case json.ObjectClose:
+			if typeURL == "" {
+				// Did not find @type field.
+				if numFields > 0 {
+					return json.Token{}, errMissingType
+				}
+				return json.Token{}, errEmptyObject
+			}
+			break Loop
+
+		case json.Name:
+			numFields++
+			if tok.Name() != "@type" {
+				// Skip value.
+				if err := d.skipJSONValue(); err != nil {
+					return json.Token{}, err
+				}
+				continue
+			}
+
+			// Return error if this was previously set already.
+			if typeURL != "" {
+				return json.Token{}, d.newError(tok.Pos(), `duplicate "@type" field`)
+			}
+			// Read field value.
+			tok, err := d.Read()
+			if err != nil {
+				return json.Token{}, err
+			}
+			if tok.Kind() != json.String {
+				return json.Token{}, d.newError(tok.Pos(), `@type field value is not a string: %v`, tok.RawString())
+			}
+			typeURL = tok.ParsedString()
+			if typeURL == "" {
+				return json.Token{}, d.newError(tok.Pos(), `@type field contains empty value`)
+			}
+			typeTok = tok
+		}
+	}
+
+	return typeTok, nil
+}
+
+// skipJSONValue parses a JSON value (null, boolean, string, number, object and
+// array) in order to advance the read to the next JSON value. It relies on
+// the decoder returning an error if the types are not in valid sequence.
+func (d decoder) skipJSONValue() error {
+	tok, err := d.Read()
+	if err != nil {
+		return err
+	}
+	// Only need to continue reading for objects and arrays.
+	switch tok.Kind() {
+	case json.ObjectOpen:
+		for {
+			tok, err := d.Read()
+			if err != nil {
+				return err
+			}
+			switch tok.Kind() {
+			case json.ObjectClose:
+				return nil
+			case json.Name:
+				// Skip object field value.
+				if err := d.skipJSONValue(); err != nil {
+					return err
+				}
+			}
+		}
+
+	case json.ArrayOpen:
+		for {
+			tok, err := d.Peek()
+			if err != nil {
+				return err
+			}
+			switch tok.Kind() {
+			case json.ArrayClose:
+				d.Read()
+				return nil
+			default:
+				// Skip array item.
+				if err := d.skipJSONValue(); err != nil {
+					return err
+				}
+			}
+		}
+	}
+	return nil
+}
+
+// unmarshalAnyValue unmarshals the given custom-type message from the JSON
+// object's "value" field.
+func (d decoder) unmarshalAnyValue(unmarshal unmarshalFunc, m pref.Message) error {
+	// Skip ObjectOpen, and start reading the fields.
+	d.Read()
+
+	var found bool // Used for detecting duplicate "value".
+	for {
+		tok, err := d.Read()
+		if err != nil {
+			return err
+		}
+		switch tok.Kind() {
+		case json.ObjectClose:
+			if !found {
+				return d.newError(tok.Pos(), `missing "value" field`)
+			}
+			return nil
+
+		case json.Name:
+			switch tok.Name() {
+			case "@type":
+				// Skip the value as this was previously parsed already.
+				d.Read()
+
+			case "value":
+				if found {
+					return d.newError(tok.Pos(), `duplicate "value" field`)
+				}
+				// Unmarshal the field value into the given message.
+				if err := unmarshal(d, m); err != nil {
+					return err
+				}
+				found = true
+
+			default:
+				if d.opts.DiscardUnknown {
+					if err := d.skipJSONValue(); err != nil {
+						return err
+					}
+					continue
+				}
+				return d.newError(tok.Pos(), "unknown field %v", tok.RawString())
+			}
+		}
+	}
+}
+
+// Wrapper types are encoded as JSON primitives like string, number or boolean.
+
+func (e encoder) marshalWrapperType(m pref.Message) error {
+	fd := m.Descriptor().Fields().ByNumber(genid.WrapperValue_Value_field_number)
+	val := m.Get(fd)
+	return e.marshalSingular(val, fd)
+}
+
+func (d decoder) unmarshalWrapperType(m pref.Message) error {
+	fd := m.Descriptor().Fields().ByNumber(genid.WrapperValue_Value_field_number)
+	val, err := d.unmarshalScalar(fd)
+	if err != nil {
+		return err
+	}
+	m.Set(fd, val)
+	return nil
+}
+
+// The JSON representation for Empty is an empty JSON object.
+
+func (e encoder) marshalEmpty(pref.Message) error {
+	e.StartObject()
+	e.EndObject()
+	return nil
+}
+
+func (d decoder) unmarshalEmpty(pref.Message) error {
+	tok, err := d.Read()
+	if err != nil {
+		return err
+	}
+	if tok.Kind() != json.ObjectOpen {
+		return d.unexpectedTokenError(tok)
+	}
+
+	for {
+		tok, err := d.Read()
+		if err != nil {
+			return err
+		}
+		switch tok.Kind() {
+		case json.ObjectClose:
+			return nil
+
+		case json.Name:
+			if d.opts.DiscardUnknown {
+				if err := d.skipJSONValue(); err != nil {
+					return err
+				}
+				continue
+			}
+			return d.newError(tok.Pos(), "unknown field %v", tok.RawString())
+
+		default:
+			return d.unexpectedTokenError(tok)
+		}
+	}
+}
+
+// The JSON representation for Struct is a JSON object that contains the encoded
+// Struct.fields map and follows the serialization rules for a map.
+
+func (e encoder) marshalStruct(m pref.Message) error {
+	fd := m.Descriptor().Fields().ByNumber(genid.Struct_Fields_field_number)
+	return e.marshalMap(m.Get(fd).Map(), fd)
+}
+
+func (d decoder) unmarshalStruct(m pref.Message) error {
+	fd := m.Descriptor().Fields().ByNumber(genid.Struct_Fields_field_number)
+	return d.unmarshalMap(m.Mutable(fd).Map(), fd)
+}
+
+// The JSON representation for ListValue is JSON array that contains the encoded
+// ListValue.values repeated field and follows the serialization rules for a
+// repeated field.
+
+func (e encoder) marshalListValue(m pref.Message) error {
+	fd := m.Descriptor().Fields().ByNumber(genid.ListValue_Values_field_number)
+	return e.marshalList(m.Get(fd).List(), fd)
+}
+
+func (d decoder) unmarshalListValue(m pref.Message) error {
+	fd := m.Descriptor().Fields().ByNumber(genid.ListValue_Values_field_number)
+	return d.unmarshalList(m.Mutable(fd).List(), fd)
+}
+
+// The JSON representation for a Value is dependent on the oneof field that is
+// set. Each of the field in the oneof has its own custom serialization rule. A
+// Value message needs to be a oneof field set, else it is an error.
+
+func (e encoder) marshalKnownValue(m pref.Message) error {
+	od := m.Descriptor().Oneofs().ByName(genid.Value_Kind_oneof_name)
+	fd := m.WhichOneof(od)
+	if fd == nil {
+		return errors.New("%s: none of the oneof fields is set", genid.Value_message_fullname)
+	}
+	if fd.Number() == genid.Value_NumberValue_field_number {
+		if v := m.Get(fd).Float(); math.IsNaN(v) || math.IsInf(v, 0) {
+			return errors.New("%s: invalid %v value", genid.Value_NumberValue_field_fullname, v)
+		}
+	}
+	return e.marshalSingular(m.Get(fd), fd)
+}
+
+func (d decoder) unmarshalKnownValue(m pref.Message) error {
+	tok, err := d.Peek()
+	if err != nil {
+		return err
+	}
+
+	var fd pref.FieldDescriptor
+	var val pref.Value
+	switch tok.Kind() {
+	case json.Null:
+		d.Read()
+		fd = m.Descriptor().Fields().ByNumber(genid.Value_NullValue_field_number)
+		val = pref.ValueOfEnum(0)
+
+	case json.Bool:
+		tok, err := d.Read()
+		if err != nil {
+			return err
+		}
+		fd = m.Descriptor().Fields().ByNumber(genid.Value_BoolValue_field_number)
+		val = pref.ValueOfBool(tok.Bool())
+
+	case json.Number:
+		tok, err := d.Read()
+		if err != nil {
+			return err
+		}
+		fd = m.Descriptor().Fields().ByNumber(genid.Value_NumberValue_field_number)
+		var ok bool
+		val, ok = unmarshalFloat(tok, 64)
+		if !ok {
+			return d.newError(tok.Pos(), "invalid %v: %v", genid.Value_message_fullname, tok.RawString())
+		}
+
+	case json.String:
+		// A JSON string may have been encoded from the number_value field,
+		// e.g. "NaN", "Infinity", etc. Parsing a proto double type also allows
+		// for it to be in JSON string form. Given this custom encoding spec,
+		// however, there is no way to identify that and hence a JSON string is
+		// always assigned to the string_value field, which means that certain
+		// encoding cannot be parsed back to the same field.
+		tok, err := d.Read()
+		if err != nil {
+			return err
+		}
+		fd = m.Descriptor().Fields().ByNumber(genid.Value_StringValue_field_number)
+		val = pref.ValueOfString(tok.ParsedString())
+
+	case json.ObjectOpen:
+		fd = m.Descriptor().Fields().ByNumber(genid.Value_StructValue_field_number)
+		val = m.NewField(fd)
+		if err := d.unmarshalStruct(val.Message()); err != nil {
+			return err
+		}
+
+	case json.ArrayOpen:
+		fd = m.Descriptor().Fields().ByNumber(genid.Value_ListValue_field_number)
+		val = m.NewField(fd)
+		if err := d.unmarshalListValue(val.Message()); err != nil {
+			return err
+		}
+
+	default:
+		return d.newError(tok.Pos(), "invalid %v: %v", genid.Value_message_fullname, tok.RawString())
+	}
+
+	m.Set(fd, val)
+	return nil
+}
+
+// The JSON representation for a Duration is a JSON string that ends in the
+// suffix "s" (indicating seconds) and is preceded by the number of seconds,
+// with nanoseconds expressed as fractional seconds.
+//
+// Durations less than one second are represented with a 0 seconds field and a
+// positive or negative nanos field. For durations of one second or more, a
+// non-zero value for the nanos field must be of the same sign as the seconds
+// field.
+//
+// Duration.seconds must be from -315,576,000,000 to +315,576,000,000 inclusive.
+// Duration.nanos must be from -999,999,999 to +999,999,999 inclusive.
+
+const (
+	secondsInNanos       = 999999999
+	maxSecondsInDuration = 315576000000
+)
+
+func (e encoder) marshalDuration(m pref.Message) error {
+	fds := m.Descriptor().Fields()
+	fdSeconds := fds.ByNumber(genid.Duration_Seconds_field_number)
+	fdNanos := fds.ByNumber(genid.Duration_Nanos_field_number)
+
+	secsVal := m.Get(fdSeconds)
+	nanosVal := m.Get(fdNanos)
+	secs := secsVal.Int()
+	nanos := nanosVal.Int()
+	if secs < -maxSecondsInDuration || secs > maxSecondsInDuration {
+		return errors.New("%s: seconds out of range %v", genid.Duration_message_fullname, secs)
+	}
+	if nanos < -secondsInNanos || nanos > secondsInNanos {
+		return errors.New("%s: nanos out of range %v", genid.Duration_message_fullname, nanos)
+	}
+	if (secs > 0 && nanos < 0) || (secs < 0 && nanos > 0) {
+		return errors.New("%s: signs of seconds and nanos do not match", genid.Duration_message_fullname)
+	}
+	// Generated output always contains 0, 3, 6, or 9 fractional digits,
+	// depending on required precision, followed by the suffix "s".
+	var sign string
+	if secs < 0 || nanos < 0 {
+		sign, secs, nanos = "-", -1*secs, -1*nanos
+	}
+	x := fmt.Sprintf("%s%d.%09d", sign, secs, nanos)
+	x = strings.TrimSuffix(x, "000")
+	x = strings.TrimSuffix(x, "000")
+	x = strings.TrimSuffix(x, ".000")
+	e.WriteString(x + "s")
+	return nil
+}
+
+func (d decoder) unmarshalDuration(m pref.Message) error {
+	tok, err := d.Read()
+	if err != nil {
+		return err
+	}
+	if tok.Kind() != json.String {
+		return d.unexpectedTokenError(tok)
+	}
+
+	secs, nanos, ok := parseDuration(tok.ParsedString())
+	if !ok {
+		return d.newError(tok.Pos(), "invalid %v value %v", genid.Duration_message_fullname, tok.RawString())
+	}
+	// Validate seconds. No need to validate nanos because parseDuration would
+	// have covered that already.
+	if secs < -maxSecondsInDuration || secs > maxSecondsInDuration {
+		return d.newError(tok.Pos(), "%v value out of range: %v", genid.Duration_message_fullname, tok.RawString())
+	}
+
+	fds := m.Descriptor().Fields()
+	fdSeconds := fds.ByNumber(genid.Duration_Seconds_field_number)
+	fdNanos := fds.ByNumber(genid.Duration_Nanos_field_number)
+
+	m.Set(fdSeconds, pref.ValueOfInt64(secs))
+	m.Set(fdNanos, pref.ValueOfInt32(nanos))
+	return nil
+}
+
+// parseDuration parses the given input string for seconds and nanoseconds value
+// for the Duration JSON format. The format is a decimal number with a suffix
+// 's'. It can have optional plus/minus sign. There needs to be at least an
+// integer or fractional part. Fractional part is limited to 9 digits only for
+// nanoseconds precision, regardless of whether there are trailing zero digits.
+// Example values are 1s, 0.1s, 1.s, .1s, +1s, -1s, -.1s.
+func parseDuration(input string) (int64, int32, bool) {
+	b := []byte(input)
+	size := len(b)
+	if size < 2 {
+		return 0, 0, false
+	}
+	if b[size-1] != 's' {
+		return 0, 0, false
+	}
+	b = b[:size-1]
+
+	// Read optional plus/minus symbol.
+	var neg bool
+	switch b[0] {
+	case '-':
+		neg = true
+		b = b[1:]
+	case '+':
+		b = b[1:]
+	}
+	if len(b) == 0 {
+		return 0, 0, false
+	}
+
+	// Read the integer part.
+	var intp []byte
+	switch {
+	case b[0] == '0':
+		b = b[1:]
+
+	case '1' <= b[0] && b[0] <= '9':
+		intp = b[0:]
+		b = b[1:]
+		n := 1
+		for len(b) > 0 && '0' <= b[0] && b[0] <= '9' {
+			n++
+			b = b[1:]
+		}
+		intp = intp[:n]
+
+	case b[0] == '.':
+		// Continue below.
+
+	default:
+		return 0, 0, false
+	}
+
+	hasFrac := false
+	var frac [9]byte
+	if len(b) > 0 {
+		if b[0] != '.' {
+			return 0, 0, false
+		}
+		// Read the fractional part.
+		b = b[1:]
+		n := 0
+		for len(b) > 0 && n < 9 && '0' <= b[0] && b[0] <= '9' {
+			frac[n] = b[0]
+			n++
+			b = b[1:]
+		}
+		// It is not valid if there are more bytes left.
+		if len(b) > 0 {
+			return 0, 0, false
+		}
+		// Pad fractional part with 0s.
+		for i := n; i < 9; i++ {
+			frac[i] = '0'
+		}
+		hasFrac = true
+	}
+
+	var secs int64
+	if len(intp) > 0 {
+		var err error
+		secs, err = strconv.ParseInt(string(intp), 10, 64)
+		if err != nil {
+			return 0, 0, false
+		}
+	}
+
+	var nanos int64
+	if hasFrac {
+		nanob := bytes.TrimLeft(frac[:], "0")
+		if len(nanob) > 0 {
+			var err error
+			nanos, err = strconv.ParseInt(string(nanob), 10, 32)
+			if err != nil {
+				return 0, 0, false
+			}
+		}
+	}
+
+	if neg {
+		if secs > 0 {
+			secs = -secs
+		}
+		if nanos > 0 {
+			nanos = -nanos
+		}
+	}
+	return secs, int32(nanos), true
+}
+
+// The JSON representation for a Timestamp is a JSON string in the RFC 3339
+// format, i.e. "{year}-{month}-{day}T{hour}:{min}:{sec}[.{frac_sec}]Z" where
+// {year} is always expressed using four digits while {month}, {day}, {hour},
+// {min}, and {sec} are zero-padded to two digits each. The fractional seconds,
+// which can go up to 9 digits, up to 1 nanosecond resolution, is optional. The
+// "Z" suffix indicates the timezone ("UTC"); the timezone is required. Encoding
+// should always use UTC (as indicated by "Z") and a decoder should be able to
+// accept both UTC and other timezones (as indicated by an offset).
+//
+// Timestamp.seconds must be from 0001-01-01T00:00:00Z to 9999-12-31T23:59:59Z
+// inclusive.
+// Timestamp.nanos must be from 0 to 999,999,999 inclusive.
+
+const (
+	maxTimestampSeconds = 253402300799
+	minTimestampSeconds = -62135596800
+)
+
+func (e encoder) marshalTimestamp(m pref.Message) error {
+	fds := m.Descriptor().Fields()
+	fdSeconds := fds.ByNumber(genid.Timestamp_Seconds_field_number)
+	fdNanos := fds.ByNumber(genid.Timestamp_Nanos_field_number)
+
+	secsVal := m.Get(fdSeconds)
+	nanosVal := m.Get(fdNanos)
+	secs := secsVal.Int()
+	nanos := nanosVal.Int()
+	if secs < minTimestampSeconds || secs > maxTimestampSeconds {
+		return errors.New("%s: seconds out of range %v", genid.Timestamp_message_fullname, secs)
+	}
+	if nanos < 0 || nanos > secondsInNanos {
+		return errors.New("%s: nanos out of range %v", genid.Timestamp_message_fullname, nanos)
+	}
+	// Uses RFC 3339, where generated output will be Z-normalized and uses 0, 3,
+	// 6 or 9 fractional digits.
+	t := time.Unix(secs, nanos).UTC()
+	x := t.Format("2006-01-02T15:04:05.000000000")
+	x = strings.TrimSuffix(x, "000")
+	x = strings.TrimSuffix(x, "000")
+	x = strings.TrimSuffix(x, ".000")
+	e.WriteString(x + "Z")
+	return nil
+}
+
+func (d decoder) unmarshalTimestamp(m pref.Message) error {
+	tok, err := d.Read()
+	if err != nil {
+		return err
+	}
+	if tok.Kind() != json.String {
+		return d.unexpectedTokenError(tok)
+	}
+
+	t, err := time.Parse(time.RFC3339Nano, tok.ParsedString())
+	if err != nil {
+		return d.newError(tok.Pos(), "invalid %v value %v", genid.Timestamp_message_fullname, tok.RawString())
+	}
+	// Validate seconds. No need to validate nanos because time.Parse would have
+	// covered that already.
+	secs := t.Unix()
+	if secs < minTimestampSeconds || secs > maxTimestampSeconds {
+		return d.newError(tok.Pos(), "%v value out of range: %v", genid.Timestamp_message_fullname, tok.RawString())
+	}
+
+	fds := m.Descriptor().Fields()
+	fdSeconds := fds.ByNumber(genid.Timestamp_Seconds_field_number)
+	fdNanos := fds.ByNumber(genid.Timestamp_Nanos_field_number)
+
+	m.Set(fdSeconds, pref.ValueOfInt64(secs))
+	m.Set(fdNanos, pref.ValueOfInt32(int32(t.Nanosecond())))
+	return nil
+}
+
+// The JSON representation for a FieldMask is a JSON string where paths are
+// separated by a comma. Fields name in each path are converted to/from
+// lower-camel naming conventions. Encoding should fail if the path name would
+// end up differently after a round-trip.
+
+func (e encoder) marshalFieldMask(m pref.Message) error {
+	fd := m.Descriptor().Fields().ByNumber(genid.FieldMask_Paths_field_number)
+	list := m.Get(fd).List()
+	paths := make([]string, 0, list.Len())
+
+	for i := 0; i < list.Len(); i++ {
+		s := list.Get(i).String()
+		if !pref.FullName(s).IsValid() {
+			return errors.New("%s contains invalid path: %q", genid.FieldMask_Paths_field_fullname, s)
+		}
+		// Return error if conversion to camelCase is not reversible.
+		cc := strs.JSONCamelCase(s)
+		if s != strs.JSONSnakeCase(cc) {
+			return errors.New("%s contains irreversible value %q", genid.FieldMask_Paths_field_fullname, s)
+		}
+		paths = append(paths, cc)
+	}
+
+	e.WriteString(strings.Join(paths, ","))
+	return nil
+}
+
+func (d decoder) unmarshalFieldMask(m pref.Message) error {
+	tok, err := d.Read()
+	if err != nil {
+		return err
+	}
+	if tok.Kind() != json.String {
+		return d.unexpectedTokenError(tok)
+	}
+	str := strings.TrimSpace(tok.ParsedString())
+	if str == "" {
+		return nil
+	}
+	paths := strings.Split(str, ",")
+
+	fd := m.Descriptor().Fields().ByNumber(genid.FieldMask_Paths_field_number)
+	list := m.Mutable(fd).List()
+
+	for _, s0 := range paths {
+		s := strs.JSONSnakeCase(s0)
+		if strings.Contains(s0, "_") || !pref.FullName(s).IsValid() {
+			return d.newError(tok.Pos(), "%v contains invalid path: %q", genid.FieldMask_Paths_field_fullname, s0)
+		}
+		list.Append(pref.ValueOfString(s))
+	}
+	return nil
+}
diff --git a/vendor/google.golang.org/protobuf/internal/encoding/json/decode.go b/vendor/google.golang.org/protobuf/internal/encoding/json/decode.go
new file mode 100644
index 000000000..b13fd29e8
--- /dev/null
+++ b/vendor/google.golang.org/protobuf/internal/encoding/json/decode.go
@@ -0,0 +1,340 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package json
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"regexp"
+	"unicode/utf8"
+
+	"google.golang.org/protobuf/internal/errors"
+)
+
+// call specifies which Decoder method was invoked.
+type call uint8
+
+const (
+	readCall call = iota
+	peekCall
+)
+
+const unexpectedFmt = "unexpected token %s"
+
+// ErrUnexpectedEOF means that EOF was encountered in the middle of the input.
+var ErrUnexpectedEOF = errors.New("%v", io.ErrUnexpectedEOF)
+
+// Decoder is a token-based JSON decoder.
+type Decoder struct {
+	// lastCall is last method called, either readCall or peekCall.
+	// Initial value is readCall.
+	lastCall call
+
+	// lastToken contains the last read token.
+	lastToken Token
+
+	// lastErr contains the last read error.
+	lastErr error
+
+	// openStack is a stack containing ObjectOpen and ArrayOpen values. The
+	// top of stack represents the object or the array the current value is
+	// directly located in.
+	openStack []Kind
+
+	// orig is used in reporting line and column.
+	orig []byte
+	// in contains the unconsumed input.
+	in []byte
+}
+
+// NewDecoder returns a Decoder to read the given []byte.
+func NewDecoder(b []byte) *Decoder {
+	return &Decoder{orig: b, in: b}
+}
+
+// Peek looks ahead and returns the next token kind without advancing a read.
+func (d *Decoder) Peek() (Token, error) {
+	defer func() { d.lastCall = peekCall }()
+	if d.lastCall == readCall {
+		d.lastToken, d.lastErr = d.Read()
+	}
+	return d.lastToken, d.lastErr
+}
+
+// Read returns the next JSON token.
+// It will return an error if there is no valid token.
+func (d *Decoder) Read() (Token, error) {
+	const scalar = Null | Bool | Number | String
+
+	defer func() { d.lastCall = readCall }()
+	if d.lastCall == peekCall {
+		return d.lastToken, d.lastErr
+	}
+
+	tok, err := d.parseNext()
+	if err != nil {
+		return Token{}, err
+	}
+
+	switch tok.kind {
+	case EOF:
+		if len(d.openStack) != 0 ||
+			d.lastToken.kind&scalar|ObjectClose|ArrayClose == 0 {
+			return Token{}, ErrUnexpectedEOF
+		}
+
+	case Null:
+		if !d.isValueNext() {
+			return Token{}, d.newSyntaxError(tok.pos, unexpectedFmt, tok.RawString())
+		}
+
+	case Bool, Number:
+		if !d.isValueNext() {
+			return Token{}, d.newSyntaxError(tok.pos, unexpectedFmt, tok.RawString())
+		}
+
+	case String:
+		if d.isValueNext() {
+			break
+		}
+		// This string token should only be for a field name.
+		if d.lastToken.kind&(ObjectOpen|comma) == 0 {
+			return Token{}, d.newSyntaxError(tok.pos, unexpectedFmt, tok.RawString())
+		}
+		if len(d.in) == 0 {
+			return Token{}, ErrUnexpectedEOF
+		}
+		if c := d.in[0]; c != ':' {
+			return Token{}, d.newSyntaxError(d.currPos(), `unexpected character %s, missing ":" after field name`, string(c))
+		}
+		tok.kind = Name
+		d.consume(1)
+
+	case ObjectOpen, ArrayOpen:
+		if !d.isValueNext() {
+			return Token{}, d.newSyntaxError(tok.pos, unexpectedFmt, tok.RawString())
+		}
+		d.openStack = append(d.openStack, tok.kind)
+
+	case ObjectClose:
+		if len(d.openStack) == 0 ||
+			d.lastToken.kind == comma ||
+			d.openStack[len(d.openStack)-1] != ObjectOpen {
+			return Token{}, d.newSyntaxError(tok.pos, unexpectedFmt, tok.RawString())
+		}
+		d.openStack = d.openStack[:len(d.openStack)-1]
+
+	case ArrayClose:
+		if len(d.openStack) == 0 ||
+			d.lastToken.kind == comma ||
+			d.openStack[len(d.openStack)-1] != ArrayOpen {
+			return Token{}, d.newSyntaxError(tok.pos, unexpectedFmt, tok.RawString())
+		}
+		d.openStack = d.openStack[:len(d.openStack)-1]
+
+	case comma:
+		if len(d.openStack) == 0 ||
+			d.lastToken.kind&(scalar|ObjectClose|ArrayClose) == 0 {
+			return Token{}, d.newSyntaxError(tok.pos, unexpectedFmt, tok.RawString())
+		}
+	}
+
+	// Update d.lastToken only after validating token to be in the right sequence.
+	d.lastToken = tok
+
+	if d.lastToken.kind == comma {
+		return d.Read()
+	}
+	return tok, nil
+}
+
+// Any sequence that looks like a non-delimiter (for error reporting).
+var errRegexp = regexp.MustCompile(`^([-+._a-zA-Z0-9]{1,32}|.)`)
+
+// parseNext parses for the next JSON token. It returns a Token object for
+// different types, except for Name. It does not handle whether the next token
+// is in a valid sequence or not.
+func (d *Decoder) parseNext() (Token, error) {
+	// Trim leading spaces.
+	d.consume(0)
+
+	in := d.in
+	if len(in) == 0 {
+		return d.consumeToken(EOF, 0), nil
+	}
+
+	switch in[0] {
+	case 'n':
+		if n := matchWithDelim("null", in); n != 0 {
+			return d.consumeToken(Null, n), nil
+		}
+
+	case 't':
+		if n := matchWithDelim("true", in); n != 0 {
+			return d.consumeBoolToken(true, n), nil
+		}
+
+	case 'f':
+		if n := matchWithDelim("false", in); n != 0 {
+			return d.consumeBoolToken(false, n), nil
+		}
+
+	case '-', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9':
+		if n, ok := parseNumber(in); ok {
+			return d.consumeToken(Number, n), nil
+		}
+
+	case '"':
+		s, n, err := d.parseString(in)
+		if err != nil {
+			return Token{}, err
+		}
+		return d.consumeStringToken(s, n), nil
+
+	case '{':
+		return d.consumeToken(ObjectOpen, 1), nil
+
+	case '}':
+		return d.consumeToken(ObjectClose, 1), nil
+
+	case '[':
+		return d.consumeToken(ArrayOpen, 1), nil
+
+	case ']':
+		return d.consumeToken(ArrayClose, 1), nil
+
+	case ',':
+		return d.consumeToken(comma, 1), nil
+	}
+	return Token{}, d.newSyntaxError(d.currPos(), "invalid value %s", errRegexp.Find(in))
+}
+
+// newSyntaxError returns an error with line and column information useful for
+// syntax errors.
+func (d *Decoder) newSyntaxError(pos int, f string, x ...interface{}) error {
+	e := errors.New(f, x...)
+	line, column := d.Position(pos)
+	return errors.New("syntax error (line %d:%d): %v", line, column, e)
+}
+
+// Position returns line and column number of given index of the original input.
+// It will panic if index is out of range.
+func (d *Decoder) Position(idx int) (line int, column int) {
+	b := d.orig[:idx]
+	line = bytes.Count(b, []byte("\n")) + 1
+	if i := bytes.LastIndexByte(b, '\n'); i >= 0 {
+		b = b[i+1:]
+	}
+	column = utf8.RuneCount(b) + 1 // ignore multi-rune characters
+	return line, column
+}
+
+// currPos returns the current index position of d.in from d.orig.
+func (d *Decoder) currPos() int {
+	return len(d.orig) - len(d.in)
+}
+
+// matchWithDelim matches s with the input b and verifies that the match
+// terminates with a delimiter of some form (e.g., r"[^-+_.a-zA-Z0-9]").
+// As a special case, EOF is considered a delimiter. It returns the length of s
+// if there is a match, else 0.
+func matchWithDelim(s string, b []byte) int {
+	if !bytes.HasPrefix(b, []byte(s)) {
+		return 0
+	}
+
+	n := len(s)
+	if n < len(b) && isNotDelim(b[n]) {
+		return 0
+	}
+	return n
+}
+
+// isNotDelim returns true if given byte is a not delimiter character.
+func isNotDelim(c byte) bool {
+	return (c == '-' || c == '+' || c == '.' || c == '_' ||
+		('a' <= c && c <= 'z') ||
+		('A' <= c && c <= 'Z') ||
+		('0' <= c && c <= '9'))
+}
+
+// consume consumes n bytes of input and any subsequent whitespace.
+func (d *Decoder) consume(n int) {
+	d.in = d.in[n:]
+	for len(d.in) > 0 {
+		switch d.in[0] {
+		case ' ', '\n', '\r', '\t':
+			d.in = d.in[1:]
+		default:
+			return
+		}
+	}
+}
+
+// isValueNext returns true if next type should be a JSON value: Null,
+// Number, String or Bool.
+func (d *Decoder) isValueNext() bool {
+	if len(d.openStack) == 0 {
+		return d.lastToken.kind == 0
+	}
+
+	start := d.openStack[len(d.openStack)-1]
+	switch start {
+	case ObjectOpen:
+		return d.lastToken.kind&Name != 0
+	case ArrayOpen:
+		return d.lastToken.kind&(ArrayOpen|comma) != 0
+	}
+	panic(fmt.Sprintf(
+		"unreachable logic in Decoder.isValueNext, lastToken.kind: %v, openStack: %v",
+		d.lastToken.kind, start))
+}
+
+// consumeToken constructs a Token for given Kind with raw value derived from
+// current d.in and given size, and consumes the given size-lenght of it.
+func (d *Decoder) consumeToken(kind Kind, size int) Token {
+	tok := Token{
+		kind: kind,
+		raw:  d.in[:size],
+		pos:  len(d.orig) - len(d.in),
+	}
+	d.consume(size)
+	return tok
+}
+
+// consumeBoolToken constructs a Token for a Bool kind with raw value derived from
+// current d.in and given size.
+func (d *Decoder) consumeBoolToken(b bool, size int) Token {
+	tok := Token{
+		kind: Bool,
+		raw:  d.in[:size],
+		pos:  len(d.orig) - len(d.in),
+		boo:  b,
+	}
+	d.consume(size)
+	return tok
+}
+
+// consumeStringToken constructs a Token for a String kind with raw value derived
+// from current d.in and given size.
+func (d *Decoder) consumeStringToken(s string, size int) Token {
+	tok := Token{
+		kind: String,
+		raw:  d.in[:size],
+		pos:  len(d.orig) - len(d.in),
+		str:  s,
+	}
+	d.consume(size)
+	return tok
+}
+
+// Clone returns a copy of the Decoder for use in reading ahead the next JSON
+// object, array or other values without affecting current Decoder.
+func (d *Decoder) Clone() *Decoder {
+	ret := *d
+	ret.openStack = append([]Kind(nil), ret.openStack...)
+	return &ret
+}
diff --git a/vendor/google.golang.org/protobuf/internal/encoding/json/decode_number.go b/vendor/google.golang.org/protobuf/internal/encoding/json/decode_number.go
new file mode 100644
index 000000000..2999d7133
--- /dev/null
+++ b/vendor/google.golang.org/protobuf/internal/encoding/json/decode_number.go
@@ -0,0 +1,254 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package json
+
+import (
+	"bytes"
+	"strconv"
+)
+
+// parseNumber reads the given []byte for a valid JSON number. If it is valid,
+// it returns the number of bytes.  Parsing logic follows the definition in
+// https://tools.ietf.org/html/rfc7159#section-6, and is based off
+// encoding/json.isValidNumber function.
+func parseNumber(input []byte) (int, bool) {
+	var n int
+
+	s := input
+	if len(s) == 0 {
+		return 0, false
+	}
+
+	// Optional -
+	if s[0] == '-' {
+		s = s[1:]
+		n++
+		if len(s) == 0 {
+			return 0, false
+		}
+	}
+
+	// Digits
+	switch {
+	case s[0] == '0':
+		s = s[1:]
+		n++
+
+	case '1' <= s[0] && s[0] <= '9':
+		s = s[1:]
+		n++
+		for len(s) > 0 && '0' <= s[0] && s[0] <= '9' {
+			s = s[1:]
+			n++
+		}
+
+	default:
+		return 0, false
+	}
+
+	// . followed by 1 or more digits.
+	if len(s) >= 2 && s[0] == '.' && '0' <= s[1] && s[1] <= '9' {
+		s = s[2:]
+		n += 2
+		for len(s) > 0 && '0' <= s[0] && s[0] <= '9' {
+			s = s[1:]
+			n++
+		}
+	}
+
+	// e or E followed by an optional - or + and
+	// 1 or more digits.
+	if len(s) >= 2 && (s[0] == 'e' || s[0] == 'E') {
+		s = s[1:]
+		n++
+		if s[0] == '+' || s[0] == '-' {
+			s = s[1:]
+			n++
+			if len(s) == 0 {
+				return 0, false
+			}
+		}
+		for len(s) > 0 && '0' <= s[0] && s[0] <= '9' {
+			s = s[1:]
+			n++
+		}
+	}
+
+	// Check that next byte is a delimiter or it is at the end.
+	if n < len(input) && isNotDelim(input[n]) {
+		return 0, false
+	}
+
+	return n, true
+}
+
+// numberParts is the result of parsing out a valid JSON number. It contains
+// the parts of a number. The parts are used for integer conversion.
+type numberParts struct {
+	neg  bool
+	intp []byte
+	frac []byte
+	exp  []byte
+}
+
+// parseNumber constructs numberParts from given []byte. The logic here is
+// similar to consumeNumber above with the difference of having to construct
+// numberParts. The slice fields in numberParts are subslices of the input.
+func parseNumberParts(input []byte) (numberParts, bool) {
+	var neg bool
+	var intp []byte
+	var frac []byte
+	var exp []byte
+
+	s := input
+	if len(s) == 0 {
+		return numberParts{}, false
+	}
+
+	// Optional -
+	if s[0] == '-' {
+		neg = true
+		s = s[1:]
+		if len(s) == 0 {
+			return numberParts{}, false
+		}
+	}
+
+	// Digits
+	switch {
+	case s[0] == '0':
+		// Skip first 0 and no need to store.
+		s = s[1:]
+
+	case '1' <= s[0] && s[0] <= '9':
+		intp = s
+		n := 1
+		s = s[1:]
+		for len(s) > 0 && '0' <= s[0] && s[0] <= '9' {
+			s = s[1:]
+			n++
+		}
+		intp = intp[:n]
+
+	default:
+		return numberParts{}, false
+	}
+
+	// . followed by 1 or more digits.
+	if len(s) >= 2 && s[0] == '.' && '0' <= s[1] && s[1] <= '9' {
+		frac = s[1:]
+		n := 1
+		s = s[2:]
+		for len(s) > 0 && '0' <= s[0] && s[0] <= '9' {
+			s = s[1:]
+			n++
+		}
+		frac = frac[:n]
+	}
+
+	// e or E followed by an optional - or + and
+	// 1 or more digits.
+	if len(s) >= 2 && (s[0] == 'e' || s[0] == 'E') {
+		s = s[1:]
+		exp = s
+		n := 0
+		if s[0] == '+' || s[0] == '-' {
+			s = s[1:]
+			n++
+			if len(s) == 0 {
+				return numberParts{}, false
+			}
+		}
+		for len(s) > 0 && '0' <= s[0] && s[0] <= '9' {
+			s = s[1:]
+			n++
+		}
+		exp = exp[:n]
+	}
+
+	return numberParts{
+		neg:  neg,
+		intp: intp,
+		frac: bytes.TrimRight(frac, "0"), // Remove unnecessary 0s to the right.
+		exp:  exp,
+	}, true
+}
+
+// normalizeToIntString returns an integer string in normal form without the
+// E-notation for given numberParts. It will return false if it is not an
+// integer or if the exponent exceeds than max/min int value.
+func normalizeToIntString(n numberParts) (string, bool) {
+	intpSize := len(n.intp)
+	fracSize := len(n.frac)
+
+	if intpSize == 0 && fracSize == 0 {
+		return "0", true
+	}
+
+	var exp int
+	if len(n.exp) > 0 {
+		i, err := strconv.ParseInt(string(n.exp), 10, 32)
+		if err != nil {
+			return "", false
+		}
+		exp = int(i)
+	}
+
+	var num []byte
+	if exp >= 0 {
+		// For positive E, shift fraction digits into integer part and also pad
+		// with zeroes as needed.
+
+		// If there are more digits in fraction than the E value, then the
+		// number is not an integer.
+		if fracSize > exp {
+			return "", false
+		}
+
+		// Make sure resulting digits are within max value limit to avoid
+		// unnecessarily constructing a large byte slice that may simply fail
+		// later on.
+		const maxDigits = 20 // Max uint64 value has 20 decimal digits.
+		if intpSize+exp > maxDigits {
+			return "", false
+		}
+
+		// Set cap to make a copy of integer part when appended.
+		num = n.intp[:len(n.intp):len(n.intp)]
+		num = append(num, n.frac...)
+		for i := 0; i < exp-fracSize; i++ {
+			num = append(num, '0')
+		}
+	} else {
+		// For negative E, shift digits in integer part out.
+
+		// If there are fractions, then the number is not an integer.
+		if fracSize > 0 {
+			return "", false
+		}
+
+		// index is where the decimal point will be after adjusting for negative
+		// exponent.
+		index := intpSize + exp
+		if index < 0 {
+			return "", false
+		}
+
+		num = n.intp
+		// If any of the digits being shifted to the right of the decimal point
+		// is non-zero, then the number is not an integer.
+		for i := index; i < intpSize; i++ {
+			if num[i] != '0' {
+				return "", false
+			}
+		}
+		num = num[:index]
+	}
+
+	if n.neg {
+		return "-" + string(num), true
+	}
+	return string(num), true
+}
diff --git a/vendor/google.golang.org/protobuf/internal/encoding/json/decode_string.go b/vendor/google.golang.org/protobuf/internal/encoding/json/decode_string.go
new file mode 100644
index 000000000..f7fea7d8d
--- /dev/null
+++ b/vendor/google.golang.org/protobuf/internal/encoding/json/decode_string.go
@@ -0,0 +1,91 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package json
+
+import (
+	"strconv"
+	"unicode"
+	"unicode/utf16"
+	"unicode/utf8"
+
+	"google.golang.org/protobuf/internal/strs"
+)
+
+func (d *Decoder) parseString(in []byte) (string, int, error) {
+	in0 := in
+	if len(in) == 0 {
+		return "", 0, ErrUnexpectedEOF
+	}
+	if in[0] != '"' {
+		return "", 0, d.newSyntaxError(d.currPos(), "invalid character %q at start of string", in[0])
+	}
+	in = in[1:]
+	i := indexNeedEscapeInBytes(in)
+	in, out := in[i:], in[:i:i] // set cap to prevent mutations
+	for len(in) > 0 {
+		switch r, n := utf8.DecodeRune(in); {
+		case r == utf8.RuneError && n == 1:
+			return "", 0, d.newSyntaxError(d.currPos(), "invalid UTF-8 in string")
+		case r < ' ':
+			return "", 0, d.newSyntaxError(d.currPos(), "invalid character %q in string", r)
+		case r == '"':
+			in = in[1:]
+			n := len(in0) - len(in)
+			return string(out), n, nil
+		case r == '\\':
+			if len(in) < 2 {
+				return "", 0, ErrUnexpectedEOF
+			}
+			switch r := in[1]; r {
+			case '"', '\\', '/':
+				in, out = in[2:], append(out, r)
+			case 'b':
+				in, out = in[2:], append(out, '\b')
+			case 'f':
+				in, out = in[2:], append(out, '\f')
+			case 'n':
+				in, out = in[2:], append(out, '\n')
+			case 'r':
+				in, out = in[2:], append(out, '\r')
+			case 't':
+				in, out = in[2:], append(out, '\t')
+			case 'u':
+				if len(in) < 6 {
+					return "", 0, ErrUnexpectedEOF
+				}
+				v, err := strconv.ParseUint(string(in[2:6]), 16, 16)
+				if err != nil {
+					return "", 0, d.newSyntaxError(d.currPos(), "invalid escape code %q in string", in[:6])
+				}
+				in = in[6:]
+
+				r := rune(v)
+				if utf16.IsSurrogate(r) {
+					if len(in) < 6 {
+						return "", 0, ErrUnexpectedEOF
+					}
+					v, err := strconv.ParseUint(string(in[2:6]), 16, 16)
+					r = utf16.DecodeRune(r, rune(v))
+					if in[0] != '\\' || in[1] != 'u' ||
+						r == unicode.ReplacementChar || err != nil {
+						return "", 0, d.newSyntaxError(d.currPos(), "invalid escape code %q in string", in[:6])
+					}
+					in = in[6:]
+				}
+				out = append(out, string(r)...)
+			default:
+				return "", 0, d.newSyntaxError(d.currPos(), "invalid escape code %q in string", in[:2])
+			}
+		default:
+			i := indexNeedEscapeInBytes(in[n:])
+			in, out = in[n+i:], append(out, in[:n+i]...)
+		}
+	}
+	return "", 0, ErrUnexpectedEOF
+}
+
+// indexNeedEscapeInBytes returns the index of the character that needs
+// escaping. If no characters need escaping, this returns the input length.
+func indexNeedEscapeInBytes(b []byte) int { return indexNeedEscapeInString(strs.UnsafeString(b)) }
diff --git a/vendor/google.golang.org/protobuf/internal/encoding/json/decode_token.go b/vendor/google.golang.org/protobuf/internal/encoding/json/decode_token.go
new file mode 100644
index 000000000..50578d659
--- /dev/null
+++ b/vendor/google.golang.org/protobuf/internal/encoding/json/decode_token.go
@@ -0,0 +1,192 @@
+// Copyright 2019 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package json
+
+import (
+	"bytes"
+	"fmt"
+	"strconv"
+)
+
+// Kind represents a token kind expressible in the JSON format.
+type Kind uint16
+
+const (
+	Invalid Kind = (1 << iota) / 2
+	EOF
+	Null
+	Bool
+	Number
+	String
+	Name
+	ObjectOpen
+	ObjectClose
+	ArrayOpen
+	ArrayClose
+
+	// comma is only for parsing in between tokens and
+	// does not need to be exported.
+	comma
+)
+
+func (k Kind) String() string {
+	switch k {
+	case EOF:
+		return "eof"
+	case Null:
+		return "null"
+	case Bool:
+		return "bool"
+	case Number:
+		return "number"
+	case String:
+		return "string"
+	case ObjectOpen:
+		return "{"
+	case ObjectClose:
+		return "}"
+	case Name:
+		return "name"
+	case ArrayOpen:
+		return "["
+	case ArrayClose:
+		return "]"
+	case comma:
+		return ","
+	}
+	return "<invalid>"
+}
+
+// Token provides a parsed token kind and value.
+//
+// Values are provided by the difference accessor methods. The accessor methods
+// Name, Bool, and ParsedString will panic if called on the wrong kind. There
+// are different accessor methods for the Number kind for converting to the
+// appropriate Go numeric type and those methods have the ok return value.
+type Token struct {
+	// Token kind.
+	kind Kind
+	// pos provides the position of the token in the original input.
+	pos int
+	// raw bytes of the serialized token.
+	// This is a subslice into the original input.
+	raw []byte
+	// boo is parsed boolean value.
+	boo bool
+	// str is parsed string value.
+	str string
+}
+
+// Kind returns the token kind.
+func (t Token) Kind() Kind {
+	return t.kind
+}
+
+// RawString returns the read value in string.
+func (t Token) RawString() string {
+	return string(t.raw)
+}
+
+// Pos returns the token position from the input.
+func (t Token) Pos() int {
+	return t.pos
+}
+
+// Name returns the object name if token is Name, else it panics.
+func (t Token) Name() string {
+	if t.kind == Name {
+		return t.str
+	}
+	panic(fmt.Sprintf("Token is not a Name: %v", t.RawString()))
+}
+
+// Bool returns the bool value if token kind is Bool, else it panics.
+func (t Token) Bool() bool {
+	if t.kind == Bool {
+		return t.boo
+	}
+	panic(fmt.Sprintf("Token is not a Bool: %v", t.RawString()))
+}
+
+// ParsedString returns the string value for a JSON string token or the read
+// value in string if token is not a string.
+func (t Token) ParsedString() string {
+	if t.kind == String {
+		return t.str
+	}
+	panic(fmt.Sprintf("Token is not a String: %v", t.RawString()))
+}
+
+// Float returns the floating-point number if token kind is Number.
+//
+// The floating-point precision is specified by the bitSize parameter: 32 for
+// float32 or 64 for float64. If bitSize=32, the result still has type float64,
+// but it will be convertible to float32 without changing its value. It will
+// return false if the number exceeds the floating point limits for given
+// bitSize.
+func (t Token) Float(bitSize int) (float64, bool) {
+	if t.kind != Number {
+		return 0, false
+	}
+	f, err := strconv.ParseFloat(t.RawString(), bitSize)
+	if err != nil {
+		return 0, false
+	}
+	return f, true
+}
+
+// Int returns the signed integer number if token is Number.
+//
+// The given bitSize specifies the integer type that the result must fit into.
+// It returns false if the number is not an integer value or if the result
+// exceeds the limits for given bitSize.
+func (t Token) Int(bitSize int) (int64, bool) {
+	s, ok := t.getIntStr()
+	if !ok {
+		return 0, false
+	}
+	n, err := strconv.ParseInt(s, 10, bitSize)
+	if err != nil {
+		return 0, false
+	}
+	return n, true
+}
+
+// Uint returns the signed integer number if token is Number.
+//
+// The given bitSize specifies the unsigned integer type that the result must
+// fit into. It returns false if the number is not an unsigned integer value
+// or if the result exceeds the limits for given bitSize.
+func (t Token) Uint(bitSize int) (uint64, bool) {
+	s, ok := t.getIntStr()
+	if !ok {
+		return 0, false
+	}
+	n, err := strconv.ParseUint(s, 10, bitSize)
+	if err != nil {
+		return 0, false
+	}
+	return n, true
+}
+
+func (t Token) getIntStr() (string, bool) {
+	if t.kind != Number {
+		return "", false
+	}
+	parts, ok := parseNumberParts(t.raw)
+	if !ok {
+		return "", false
+	}
+	return normalizeToIntString(parts)
+}
+
+// TokenEquals returns true if given Tokens are equal, else false.
+func TokenEquals(x, y Token) bool {
+	return x.kind == y.kind &&
+		x.pos == y.pos &&
+		bytes.Equal(x.raw, y.raw) &&
+		x.boo == y.boo &&
+		x.str == y.str
+}
diff --git a/vendor/google.golang.org/protobuf/internal/encoding/json/encode.go b/vendor/google.golang.org/protobuf/internal/encoding/json/encode.go
new file mode 100644
index 000000000..fbdf34873
--- /dev/null
+++ b/vendor/google.golang.org/protobuf/internal/encoding/json/encode.go
@@ -0,0 +1,276 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package json
+
+import (
+	"math"
+	"math/bits"
+	"strconv"
+	"strings"
+	"unicode/utf8"
+
+	"google.golang.org/protobuf/internal/detrand"
+	"google.golang.org/protobuf/internal/errors"
+)
+
+// kind represents an encoding type.
+type kind uint8
+
+const (
+	_ kind = (1 << iota) / 2
+	name
+	scalar
+	objectOpen
+	objectClose
+	arrayOpen
+	arrayClose
+)
+
+// Encoder provides methods to write out JSON constructs and values. The user is
+// responsible for producing valid sequences of JSON constructs and values.
+type Encoder struct {
+	indent   string
+	lastKind kind
+	indents  []byte
+	out      []byte
+}
+
+// NewEncoder returns an Encoder.
+//
+// If indent is a non-empty string, it causes every entry for an Array or Object
+// to be preceded by the indent and trailed by a newline.
+func NewEncoder(indent string) (*Encoder, error) {
+	e := &Encoder{}
+	if len(indent) > 0 {
+		if strings.Trim(indent, " \t") != "" {
+			return nil, errors.New("indent may only be composed of space or tab characters")
+		}
+		e.indent = indent
+	}
+	return e, nil
+}
+
+// Bytes returns the content of the written bytes.
+func (e *Encoder) Bytes() []byte {
+	return e.out
+}
+
+// WriteNull writes out the null value.
+func (e *Encoder) WriteNull() {
+	e.prepareNext(scalar)
+	e.out = append(e.out, "null"...)
+}
+
+// WriteBool writes out the given boolean value.
+func (e *Encoder) WriteBool(b bool) {
+	e.prepareNext(scalar)
+	if b {
+		e.out = append(e.out, "true"...)
+	} else {
+		e.out = append(e.out, "false"...)
+	}
+}
+
+// WriteString writes out the given string in JSON string value. Returns error
+// if input string contains invalid UTF-8.
+func (e *Encoder) WriteString(s string) error {
+	e.prepareNext(scalar)
+	var err error
+	if e.out, err = appendString(e.out, s); err != nil {
+		return err
+	}
+	return nil
+}
+
+// Sentinel error used for indicating invalid UTF-8.
+var errInvalidUTF8 = errors.New("invalid UTF-8")
+
+func appendString(out []byte, in string) ([]byte, error) {
+	out = append(out, '"')
+	i := indexNeedEscapeInString(in)
+	in, out = in[i:], append(out, in[:i]...)
+	for len(in) > 0 {
+		switch r, n := utf8.DecodeRuneInString(in); {
+		case r == utf8.RuneError && n == 1:
+			return out, errInvalidUTF8
+		case r < ' ' || r == '"' || r == '\\':
+			out = append(out, '\\')
+			switch r {
+			case '"', '\\':
+				out = append(out, byte(r))
+			case '\b':
+				out = append(out, 'b')
+			case '\f':
+				out = append(out, 'f')
+			case '\n':
+				out = append(out, 'n')
+			case '\r':
+				out = append(out, 'r')
+			case '\t':
+				out = append(out, 't')
+			default:
+				out = append(out, 'u')
+				out = append(out, "0000"[1+(bits.Len32(uint32(r))-1)/4:]...)
+				out = strconv.AppendUint(out, uint64(r), 16)
+			}
+			in = in[n:]
+		default:
+			i := indexNeedEscapeInString(in[n:])
+			in, out = in[n+i:], append(out, in[:n+i]...)
+		}
+	}
+	out = append(out, '"')
+	return out, nil
+}
+
+// indexNeedEscapeInString returns the index of the character that needs
+// escaping. If no characters need escaping, this returns the input length.
+func indexNeedEscapeInString(s string) int {
+	for i, r := range s {
+		if r < ' ' || r == '\\' || r == '"' || r == utf8.RuneError {
+			return i
+		}
+	}
+	return len(s)
+}
+
+// WriteFloat writes out the given float and bitSize in JSON number value.
+func (e *Encoder) WriteFloat(n float64, bitSize int) {
+	e.prepareNext(scalar)
+	e.out = appendFloat(e.out, n, bitSize)
+}
+
+// appendFloat formats given float in bitSize, and appends to the given []byte.
+func appendFloat(out []byte, n float64, bitSize int) []byte {
+	switch {
+	case math.IsNaN(n):
+		return append(out, `"NaN"`...)
+	case math.IsInf(n, +1):
+		return append(out, `"Infinity"`...)
+	case math.IsInf(n, -1):
+		return append(out, `"-Infinity"`...)
+	}
+
+	// JSON number formatting logic based on encoding/json.
+	// See floatEncoder.encode for reference.
+	fmt := byte('f')
+	if abs := math.Abs(n); abs != 0 {
+		if bitSize == 64 && (abs < 1e-6 || abs >= 1e21) ||
+			bitSize == 32 && (float32(abs) < 1e-6 || float32(abs) >= 1e21) {
+			fmt = 'e'
+		}
+	}
+	out = strconv.AppendFloat(out, n, fmt, -1, bitSize)
+	if fmt == 'e' {
+		n := len(out)
+		if n >= 4 && out[n-4] == 'e' && out[n-3] == '-' && out[n-2] == '0' {
+			out[n-2] = out[n-1]
+			out = out[:n-1]
+		}
+	}
+	return out
+}
+
+// WriteInt writes out the given signed integer in JSON number value.
+func (e *Encoder) WriteInt(n int64) {
+	e.prepareNext(scalar)
+	e.out = append(e.out, strconv.FormatInt(n, 10)...)
+}
+
+// WriteUint writes out the given unsigned integer in JSON number value.
+func (e *Encoder) WriteUint(n uint64) {
+	e.prepareNext(scalar)
+	e.out = append(e.out, strconv.FormatUint(n, 10)...)
+}
+
+// StartObject writes out the '{' symbol.
+func (e *Encoder) StartObject() {
+	e.prepareNext(objectOpen)
+	e.out = append(e.out, '{')
+}
+
+// EndObject writes out the '}' symbol.
+func (e *Encoder) EndObject() {
+	e.prepareNext(objectClose)
+	e.out = append(e.out, '}')
+}
+
+// WriteName writes out the given string in JSON string value and the name
+// separator ':'. Returns error if input string contains invalid UTF-8, which
+// should not be likely as protobuf field names should be valid.
+func (e *Encoder) WriteName(s string) error {
+	e.prepareNext(name)
+	var err error
+	// Append to output regardless of error.
+	e.out, err = appendString(e.out, s)
+	e.out = append(e.out, ':')
+	return err
+}
+
+// StartArray writes out the '[' symbol.
+func (e *Encoder) StartArray() {
+	e.prepareNext(arrayOpen)
+	e.out = append(e.out, '[')
+}
+
+// EndArray writes out the ']' symbol.
+func (e *Encoder) EndArray() {
+	e.prepareNext(arrayClose)
+	e.out = append(e.out, ']')
+}
+
+// prepareNext adds possible comma and indentation for the next value based
+// on last type and indent option. It also updates lastKind to next.
+func (e *Encoder) prepareNext(next kind) {
+	defer func() {
+		// Set lastKind to next.
+		e.lastKind = next
+	}()
+
+	if len(e.indent) == 0 {
+		// Need to add comma on the following condition.
+		if e.lastKind&(scalar|objectClose|arrayClose) != 0 &&
+			next&(name|scalar|objectOpen|arrayOpen) != 0 {
+			e.out = append(e.out, ',')
+			// For single-line output, add a random extra space after each
+			// comma to make output unstable.
+			if detrand.Bool() {
+				e.out = append(e.out, ' ')
+			}
+		}
+		return
+	}
+
+	switch {
+	case e.lastKind&(objectOpen|arrayOpen) != 0:
+		// If next type is NOT closing, add indent and newline.
+		if next&(objectClose|arrayClose) == 0 {
+			e.indents = append(e.indents, e.indent...)
+			e.out = append(e.out, '\n')
+			e.out = append(e.out, e.indents...)
+		}
+
+	case e.lastKind&(scalar|objectClose|arrayClose) != 0:
+		switch {
+		// If next type is either a value or name, add comma and newline.
+		case next&(name|scalar|objectOpen|arrayOpen) != 0:
+			e.out = append(e.out, ',', '\n')
+
+		// If next type is a closing object or array, adjust indentation.
+		case next&(objectClose|arrayClose) != 0:
+			e.indents = e.indents[:len(e.indents)-len(e.indent)]
+			e.out = append(e.out, '\n')
+		}
+		e.out = append(e.out, e.indents...)
+
+	case e.lastKind&name != 0:
+		e.out = append(e.out, ' ')
+		// For multi-line output, add a random extra space after key: to make
+		// output unstable.
+		if detrand.Bool() {
+			e.out = append(e.out, ' ')
+		}
+	}
+}
diff --git a/vendor/google.golang.org/protobuf/types/known/wrapperspb/wrappers.pb.go b/vendor/google.golang.org/protobuf/types/known/wrapperspb/wrappers.pb.go
new file mode 100644
index 000000000..895a8049e
--- /dev/null
+++ b/vendor/google.golang.org/protobuf/types/known/wrapperspb/wrappers.pb.go
@@ -0,0 +1,760 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2008 Google Inc.  All rights reserved.
+// https://developers.google.com/protocol-buffers/
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Wrappers for primitive (non-message) types. These types are useful
+// for embedding primitives in the `google.protobuf.Any` type and for places
+// where we need to distinguish between the absence of a primitive
+// typed field and its default value.
+//
+// These wrappers have no meaningful use within repeated fields as they lack
+// the ability to detect presence on individual elements.
+// These wrappers have no meaningful use within a map or a oneof since
+// individual entries of a map or fields of a oneof can already detect presence.
+
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: google/protobuf/wrappers.proto
+
+package wrapperspb
+
+import (
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
+)
+
+// Wrapper message for `double`.
+//
+// The JSON representation for `DoubleValue` is JSON number.
+type DoubleValue struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// The double value.
+	Value float64 `protobuf:"fixed64,1,opt,name=value,proto3" json:"value,omitempty"`
+}
+
+// Double stores v in a new DoubleValue and returns a pointer to it.
+func Double(v float64) *DoubleValue {
+	return &DoubleValue{Value: v}
+}
+
+func (x *DoubleValue) Reset() {
+	*x = DoubleValue{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_google_protobuf_wrappers_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *DoubleValue) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*DoubleValue) ProtoMessage() {}
+
+func (x *DoubleValue) ProtoReflect() protoreflect.Message {
+	mi := &file_google_protobuf_wrappers_proto_msgTypes[0]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use DoubleValue.ProtoReflect.Descriptor instead.
+func (*DoubleValue) Descriptor() ([]byte, []int) {
+	return file_google_protobuf_wrappers_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *DoubleValue) GetValue() float64 {
+	if x != nil {
+		return x.Value
+	}
+	return 0
+}
+
+// Wrapper message for `float`.
+//
+// The JSON representation for `FloatValue` is JSON number.
+type FloatValue struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// The float value.
+	Value float32 `protobuf:"fixed32,1,opt,name=value,proto3" json:"value,omitempty"`
+}
+
+// Float stores v in a new FloatValue and returns a pointer to it.
+func Float(v float32) *FloatValue {
+	return &FloatValue{Value: v}
+}
+
+func (x *FloatValue) Reset() {
+	*x = FloatValue{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_google_protobuf_wrappers_proto_msgTypes[1]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *FloatValue) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*FloatValue) ProtoMessage() {}
+
+func (x *FloatValue) ProtoReflect() protoreflect.Message {
+	mi := &file_google_protobuf_wrappers_proto_msgTypes[1]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use FloatValue.ProtoReflect.Descriptor instead.
+func (*FloatValue) Descriptor() ([]byte, []int) {
+	return file_google_protobuf_wrappers_proto_rawDescGZIP(), []int{1}
+}
+
+func (x *FloatValue) GetValue() float32 {
+	if x != nil {
+		return x.Value
+	}
+	return 0
+}
+
+// Wrapper message for `int64`.
+//
+// The JSON representation for `Int64Value` is JSON string.
+type Int64Value struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// The int64 value.
+	Value int64 `protobuf:"varint,1,opt,name=value,proto3" json:"value,omitempty"`
+}
+
+// Int64 stores v in a new Int64Value and returns a pointer to it.
+func Int64(v int64) *Int64Value {
+	return &Int64Value{Value: v}
+}
+
+func (x *Int64Value) Reset() {
+	*x = Int64Value{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_google_protobuf_wrappers_proto_msgTypes[2]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *Int64Value) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Int64Value) ProtoMessage() {}
+
+func (x *Int64Value) ProtoReflect() protoreflect.Message {
+	mi := &file_google_protobuf_wrappers_proto_msgTypes[2]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Int64Value.ProtoReflect.Descriptor instead.
+func (*Int64Value) Descriptor() ([]byte, []int) {
+	return file_google_protobuf_wrappers_proto_rawDescGZIP(), []int{2}
+}
+
+func (x *Int64Value) GetValue() int64 {
+	if x != nil {
+		return x.Value
+	}
+	return 0
+}
+
+// Wrapper message for `uint64`.
+//
+// The JSON representation for `UInt64Value` is JSON string.
+type UInt64Value struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// The uint64 value.
+	Value uint64 `protobuf:"varint,1,opt,name=value,proto3" json:"value,omitempty"`
+}
+
+// UInt64 stores v in a new UInt64Value and returns a pointer to it.
+func UInt64(v uint64) *UInt64Value {
+	return &UInt64Value{Value: v}
+}
+
+func (x *UInt64Value) Reset() {
+	*x = UInt64Value{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_google_protobuf_wrappers_proto_msgTypes[3]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *UInt64Value) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*UInt64Value) ProtoMessage() {}
+
+func (x *UInt64Value) ProtoReflect() protoreflect.Message {
+	mi := &file_google_protobuf_wrappers_proto_msgTypes[3]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use UInt64Value.ProtoReflect.Descriptor instead.
+func (*UInt64Value) Descriptor() ([]byte, []int) {
+	return file_google_protobuf_wrappers_proto_rawDescGZIP(), []int{3}
+}
+
+func (x *UInt64Value) GetValue() uint64 {
+	if x != nil {
+		return x.Value
+	}
+	return 0
+}
+
+// Wrapper message for `int32`.
+//
+// The JSON representation for `Int32Value` is JSON number.
+type Int32Value struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// The int32 value.
+	Value int32 `protobuf:"varint,1,opt,name=value,proto3" json:"value,omitempty"`
+}
+
+// Int32 stores v in a new Int32Value and returns a pointer to it.
+func Int32(v int32) *Int32Value {
+	return &Int32Value{Value: v}
+}
+
+func (x *Int32Value) Reset() {
+	*x = Int32Value{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_google_protobuf_wrappers_proto_msgTypes[4]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *Int32Value) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Int32Value) ProtoMessage() {}
+
+func (x *Int32Value) ProtoReflect() protoreflect.Message {
+	mi := &file_google_protobuf_wrappers_proto_msgTypes[4]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Int32Value.ProtoReflect.Descriptor instead.
+func (*Int32Value) Descriptor() ([]byte, []int) {
+	return file_google_protobuf_wrappers_proto_rawDescGZIP(), []int{4}
+}
+
+func (x *Int32Value) GetValue() int32 {
+	if x != nil {
+		return x.Value
+	}
+	return 0
+}
+
+// Wrapper message for `uint32`.
+//
+// The JSON representation for `UInt32Value` is JSON number.
+type UInt32Value struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// The uint32 value.
+	Value uint32 `protobuf:"varint,1,opt,name=value,proto3" json:"value,omitempty"`
+}
+
+// UInt32 stores v in a new UInt32Value and returns a pointer to it.
+func UInt32(v uint32) *UInt32Value {
+	return &UInt32Value{Value: v}
+}
+
+func (x *UInt32Value) Reset() {
+	*x = UInt32Value{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_google_protobuf_wrappers_proto_msgTypes[5]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *UInt32Value) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*UInt32Value) ProtoMessage() {}
+
+func (x *UInt32Value) ProtoReflect() protoreflect.Message {
+	mi := &file_google_protobuf_wrappers_proto_msgTypes[5]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use UInt32Value.ProtoReflect.Descriptor instead.
+func (*UInt32Value) Descriptor() ([]byte, []int) {
+	return file_google_protobuf_wrappers_proto_rawDescGZIP(), []int{5}
+}
+
+func (x *UInt32Value) GetValue() uint32 {
+	if x != nil {
+		return x.Value
+	}
+	return 0
+}
+
+// Wrapper message for `bool`.
+//
+// The JSON representation for `BoolValue` is JSON `true` and `false`.
+type BoolValue struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// The bool value.
+	Value bool `protobuf:"varint,1,opt,name=value,proto3" json:"value,omitempty"`
+}
+
+// Bool stores v in a new BoolValue and returns a pointer to it.
+func Bool(v bool) *BoolValue {
+	return &BoolValue{Value: v}
+}
+
+func (x *BoolValue) Reset() {
+	*x = BoolValue{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_google_protobuf_wrappers_proto_msgTypes[6]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *BoolValue) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*BoolValue) ProtoMessage() {}
+
+func (x *BoolValue) ProtoReflect() protoreflect.Message {
+	mi := &file_google_protobuf_wrappers_proto_msgTypes[6]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use BoolValue.ProtoReflect.Descriptor instead.
+func (*BoolValue) Descriptor() ([]byte, []int) {
+	return file_google_protobuf_wrappers_proto_rawDescGZIP(), []int{6}
+}
+
+func (x *BoolValue) GetValue() bool {
+	if x != nil {
+		return x.Value
+	}
+	return false
+}
+
+// Wrapper message for `string`.
+//
+// The JSON representation for `StringValue` is JSON string.
+type StringValue struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// The string value.
+	Value string `protobuf:"bytes,1,opt,name=value,proto3" json:"value,omitempty"`
+}
+
+// String stores v in a new StringValue and returns a pointer to it.
+func String(v string) *StringValue {
+	return &StringValue{Value: v}
+}
+
+func (x *StringValue) Reset() {
+	*x = StringValue{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_google_protobuf_wrappers_proto_msgTypes[7]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *StringValue) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*StringValue) ProtoMessage() {}
+
+func (x *StringValue) ProtoReflect() protoreflect.Message {
+	mi := &file_google_protobuf_wrappers_proto_msgTypes[7]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use StringValue.ProtoReflect.Descriptor instead.
+func (*StringValue) Descriptor() ([]byte, []int) {
+	return file_google_protobuf_wrappers_proto_rawDescGZIP(), []int{7}
+}
+
+func (x *StringValue) GetValue() string {
+	if x != nil {
+		return x.Value
+	}
+	return ""
+}
+
+// Wrapper message for `bytes`.
+//
+// The JSON representation for `BytesValue` is JSON string.
+type BytesValue struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// The bytes value.
+	Value []byte `protobuf:"bytes,1,opt,name=value,proto3" json:"value,omitempty"`
+}
+
+// Bytes stores v in a new BytesValue and returns a pointer to it.
+func Bytes(v []byte) *BytesValue {
+	return &BytesValue{Value: v}
+}
+
+func (x *BytesValue) Reset() {
+	*x = BytesValue{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_google_protobuf_wrappers_proto_msgTypes[8]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *BytesValue) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*BytesValue) ProtoMessage() {}
+
+func (x *BytesValue) ProtoReflect() protoreflect.Message {
+	mi := &file_google_protobuf_wrappers_proto_msgTypes[8]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use BytesValue.ProtoReflect.Descriptor instead.
+func (*BytesValue) Descriptor() ([]byte, []int) {
+	return file_google_protobuf_wrappers_proto_rawDescGZIP(), []int{8}
+}
+
+func (x *BytesValue) GetValue() []byte {
+	if x != nil {
+		return x.Value
+	}
+	return nil
+}
+
+var File_google_protobuf_wrappers_proto protoreflect.FileDescriptor
+
+var file_google_protobuf_wrappers_proto_rawDesc = []byte{
+	0x0a, 0x1e, 0x67, 0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x2f, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x62, 0x75,
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+	0x12, 0x14, 0x0a, 0x05, 0x76, 0x61, 0x6c, 0x75, 0x65, 0x18, 0x01, 0x20, 0x01, 0x28, 0x01, 0x52,
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+	0x65, 0x18, 0x01, 0x20, 0x01, 0x28, 0x03, 0x52, 0x05, 0x76, 0x61, 0x6c, 0x75, 0x65, 0x22, 0x23,
+	0x0a, 0x0b, 0x55, 0x49, 0x6e, 0x74, 0x36, 0x34, 0x56, 0x61, 0x6c, 0x75, 0x65, 0x12, 0x14, 0x0a,
+	0x05, 0x76, 0x61, 0x6c, 0x75, 0x65, 0x18, 0x01, 0x20, 0x01, 0x28, 0x04, 0x52, 0x05, 0x76, 0x61,
+	0x6c, 0x75, 0x65, 0x22, 0x22, 0x0a, 0x0a, 0x49, 0x6e, 0x74, 0x33, 0x32, 0x56, 0x61, 0x6c, 0x75,
+	0x65, 0x12, 0x14, 0x0a, 0x05, 0x76, 0x61, 0x6c, 0x75, 0x65, 0x18, 0x01, 0x20, 0x01, 0x28, 0x05,
+	0x52, 0x05, 0x76, 0x61, 0x6c, 0x75, 0x65, 0x22, 0x23, 0x0a, 0x0b, 0x55, 0x49, 0x6e, 0x74, 0x33,
+	0x32, 0x56, 0x61, 0x6c, 0x75, 0x65, 0x12, 0x14, 0x0a, 0x05, 0x76, 0x61, 0x6c, 0x75, 0x65, 0x18,
+	0x01, 0x20, 0x01, 0x28, 0x0d, 0x52, 0x05, 0x76, 0x61, 0x6c, 0x75, 0x65, 0x22, 0x21, 0x0a, 0x09,
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+	0x75, 0x65, 0x18, 0x01, 0x20, 0x01, 0x28, 0x08, 0x52, 0x05, 0x76, 0x61, 0x6c, 0x75, 0x65, 0x22,
+	0x23, 0x0a, 0x0b, 0x53, 0x74, 0x72, 0x69, 0x6e, 0x67, 0x56, 0x61, 0x6c, 0x75, 0x65, 0x12, 0x14,
+	0x0a, 0x05, 0x76, 0x61, 0x6c, 0x75, 0x65, 0x18, 0x01, 0x20, 0x01, 0x28, 0x09, 0x52, 0x05, 0x76,
+	0x61, 0x6c, 0x75, 0x65, 0x22, 0x22, 0x0a, 0x0a, 0x42, 0x79, 0x74, 0x65, 0x73, 0x56, 0x61, 0x6c,
+	0x75, 0x65, 0x12, 0x14, 0x0a, 0x05, 0x76, 0x61, 0x6c, 0x75, 0x65, 0x18, 0x01, 0x20, 0x01, 0x28,
+	0x0c, 0x52, 0x05, 0x76, 0x61, 0x6c, 0x75, 0x65, 0x42, 0x83, 0x01, 0x0a, 0x13, 0x63, 0x6f, 0x6d,
+	0x2e, 0x67, 0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x62, 0x75, 0x66,
+	0x42, 0x0d, 0x57, 0x72, 0x61, 0x70, 0x70, 0x65, 0x72, 0x73, 0x50, 0x72, 0x6f, 0x74, 0x6f, 0x50,
+	0x01, 0x5a, 0x31, 0x67, 0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x2e, 0x67, 0x6f, 0x6c, 0x61, 0x6e, 0x67,
+	0x2e, 0x6f, 0x72, 0x67, 0x2f, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x62, 0x75, 0x66, 0x2f, 0x74, 0x79,
+	0x70, 0x65, 0x73, 0x2f, 0x6b, 0x6e, 0x6f, 0x77, 0x6e, 0x2f, 0x77, 0x72, 0x61, 0x70, 0x70, 0x65,
+	0x72, 0x73, 0x70, 0x62, 0xf8, 0x01, 0x01, 0xa2, 0x02, 0x03, 0x47, 0x50, 0x42, 0xaa, 0x02, 0x1e,
+	0x47, 0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x2e, 0x50, 0x72, 0x6f, 0x74, 0x6f, 0x62, 0x75, 0x66, 0x2e,
+	0x57, 0x65, 0x6c, 0x6c, 0x4b, 0x6e, 0x6f, 0x77, 0x6e, 0x54, 0x79, 0x70, 0x65, 0x73, 0x62, 0x06,
+	0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+}
+
+var (
+	file_google_protobuf_wrappers_proto_rawDescOnce sync.Once
+	file_google_protobuf_wrappers_proto_rawDescData = file_google_protobuf_wrappers_proto_rawDesc
+)
+
+func file_google_protobuf_wrappers_proto_rawDescGZIP() []byte {
+	file_google_protobuf_wrappers_proto_rawDescOnce.Do(func() {
+		file_google_protobuf_wrappers_proto_rawDescData = protoimpl.X.CompressGZIP(file_google_protobuf_wrappers_proto_rawDescData)
+	})
+	return file_google_protobuf_wrappers_proto_rawDescData
+}
+
+var file_google_protobuf_wrappers_proto_msgTypes = make([]protoimpl.MessageInfo, 9)
+var file_google_protobuf_wrappers_proto_goTypes = []interface{}{
+	(*DoubleValue)(nil), // 0: google.protobuf.DoubleValue
+	(*FloatValue)(nil),  // 1: google.protobuf.FloatValue
+	(*Int64Value)(nil),  // 2: google.protobuf.Int64Value
+	(*UInt64Value)(nil), // 3: google.protobuf.UInt64Value
+	(*Int32Value)(nil),  // 4: google.protobuf.Int32Value
+	(*UInt32Value)(nil), // 5: google.protobuf.UInt32Value
+	(*BoolValue)(nil),   // 6: google.protobuf.BoolValue
+	(*StringValue)(nil), // 7: google.protobuf.StringValue
+	(*BytesValue)(nil),  // 8: google.protobuf.BytesValue
+}
+var file_google_protobuf_wrappers_proto_depIdxs = []int32{
+	0, // [0:0] is the sub-list for method output_type
+	0, // [0:0] is the sub-list for method input_type
+	0, // [0:0] is the sub-list for extension type_name
+	0, // [0:0] is the sub-list for extension extendee
+	0, // [0:0] is the sub-list for field type_name
+}
+
+func init() { file_google_protobuf_wrappers_proto_init() }
+func file_google_protobuf_wrappers_proto_init() {
+	if File_google_protobuf_wrappers_proto != nil {
+		return
+	}
+	if !protoimpl.UnsafeEnabled {
+		file_google_protobuf_wrappers_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*DoubleValue); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_google_protobuf_wrappers_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*FloatValue); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_google_protobuf_wrappers_proto_msgTypes[2].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*Int64Value); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_google_protobuf_wrappers_proto_msgTypes[3].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*UInt64Value); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_google_protobuf_wrappers_proto_msgTypes[4].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*Int32Value); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_google_protobuf_wrappers_proto_msgTypes[5].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*UInt32Value); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_google_protobuf_wrappers_proto_msgTypes[6].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*BoolValue); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_google_protobuf_wrappers_proto_msgTypes[7].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*StringValue); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_google_protobuf_wrappers_proto_msgTypes[8].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*BytesValue); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_google_protobuf_wrappers_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   9,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_google_protobuf_wrappers_proto_goTypes,
+		DependencyIndexes: file_google_protobuf_wrappers_proto_depIdxs,
+		MessageInfos:      file_google_protobuf_wrappers_proto_msgTypes,
+	}.Build()
+	File_google_protobuf_wrappers_proto = out.File
+	file_google_protobuf_wrappers_proto_rawDesc = nil
+	file_google_protobuf_wrappers_proto_goTypes = nil
+	file_google_protobuf_wrappers_proto_depIdxs = nil
+}
diff --git a/vendor/modules.txt b/vendor/modules.txt
index 96b85a526..7cee2da50 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -48,6 +48,8 @@ github.com/Microsoft/hcsshim/pkg/ociwclayer
 github.com/beorn7/perks/quantile
 # github.com/bits-and-blooms/bitset v1.2.0
 github.com/bits-and-blooms/bitset
+# github.com/cenkalti/backoff/v4 v4.1.1
+github.com/cenkalti/backoff/v4
 # github.com/cespare/xxhash/v2 v2.1.1
 github.com/cespare/xxhash/v2
 # github.com/cilium/ebpf v0.6.2
@@ -222,13 +224,17 @@ github.com/gogo/protobuf/vanity
 github.com/gogo/protobuf/vanity/command
 # github.com/golang/groupcache v0.0.0-20200121045136-8c9f03a8e57e
 github.com/golang/groupcache/lru
-# github.com/golang/protobuf v1.5.0
+# github.com/golang/protobuf v1.5.2
+github.com/golang/protobuf/descriptor
+github.com/golang/protobuf/jsonpb
 github.com/golang/protobuf/proto
+github.com/golang/protobuf/protoc-gen-go/descriptor
 github.com/golang/protobuf/ptypes
 github.com/golang/protobuf/ptypes/any
 github.com/golang/protobuf/ptypes/duration
 github.com/golang/protobuf/ptypes/timestamp
-# github.com/google/go-cmp v0.5.5
+github.com/golang/protobuf/ptypes/wrappers
+# github.com/google/go-cmp v0.5.6
 ## explicit
 github.com/google/go-cmp/cmp
 github.com/google/go-cmp/cmp/cmpopts
@@ -241,9 +247,16 @@ github.com/google/gofuzz
 # github.com/google/uuid v1.2.0
 ## explicit
 github.com/google/uuid
+# github.com/grpc-ecosystem/go-grpc-middleware v1.0.1-0.20190118093823-f849b5445de4
+## explicit
+github.com/grpc-ecosystem/go-grpc-middleware
 # github.com/grpc-ecosystem/go-grpc-prometheus v1.2.0
 ## explicit
 github.com/grpc-ecosystem/go-grpc-prometheus
+# github.com/grpc-ecosystem/grpc-gateway v1.16.0
+github.com/grpc-ecosystem/grpc-gateway/internal
+github.com/grpc-ecosystem/grpc-gateway/runtime
+github.com/grpc-ecosystem/grpc-gateway/utilities
 # github.com/hashicorp/errwrap v1.0.0
 github.com/hashicorp/errwrap
 # github.com/hashicorp/go-multierror v1.0.0
@@ -338,7 +351,7 @@ github.com/shurcooL/sanitized_anchor_name
 github.com/sirupsen/logrus
 # github.com/stefanberger/go-pkcs11uri v0.0.0-20201008174630-78d3cae3a980
 github.com/stefanberger/go-pkcs11uri
-# github.com/stretchr/testify v1.6.1
+# github.com/stretchr/testify v1.7.0
 ## explicit
 github.com/stretchr/testify/assert
 github.com/stretchr/testify/require
@@ -359,6 +372,44 @@ go.opencensus.io/internal
 go.opencensus.io/trace
 go.opencensus.io/trace/internal
 go.opencensus.io/trace/tracestate
+# go.opentelemetry.io/contrib v0.21.0
+go.opentelemetry.io/contrib
+# go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.21.0
+## explicit
+go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc
+# go.opentelemetry.io/otel v1.0.0-RC1
+## explicit
+go.opentelemetry.io/otel
+go.opentelemetry.io/otel/attribute
+go.opentelemetry.io/otel/baggage
+go.opentelemetry.io/otel/codes
+go.opentelemetry.io/otel/internal
+go.opentelemetry.io/otel/internal/baggage
+go.opentelemetry.io/otel/internal/global
+go.opentelemetry.io/otel/propagation
+go.opentelemetry.io/otel/semconv/v1.4.0
+# go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.0.0-RC1
+go.opentelemetry.io/otel/exporters/otlp/otlptrace
+go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/connection
+go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/otlpconfig
+go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/tracetransform
+# go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.0.0-RC1
+## explicit
+go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc
+# go.opentelemetry.io/otel/sdk v1.0.0-RC1
+## explicit
+go.opentelemetry.io/otel/sdk/instrumentation
+go.opentelemetry.io/otel/sdk/internal
+go.opentelemetry.io/otel/sdk/resource
+go.opentelemetry.io/otel/sdk/trace
+# go.opentelemetry.io/otel/trace v1.0.0-RC1
+## explicit
+go.opentelemetry.io/otel/trace
+# go.opentelemetry.io/proto/otlp v0.9.0
+go.opentelemetry.io/proto/otlp/collector/trace/v1
+go.opentelemetry.io/proto/otlp/common/v1
+go.opentelemetry.io/proto/otlp/resource/v1
+go.opentelemetry.io/proto/otlp/trace/v1
 # golang.org/x/crypto v0.0.0-20210322153248-0c34fe9e7dc2
 golang.org/x/crypto/cast5
 golang.org/x/crypto/ed25519
@@ -420,7 +471,10 @@ google.golang.org/appengine/internal/remote_api
 google.golang.org/appengine/internal/urlfetch
 google.golang.org/appengine/urlfetch
 # google.golang.org/genproto v0.0.0-20201110150050-8816d57aaa9a => google.golang.org/genproto v0.0.0-20200224152610-e50cd9704f63
+google.golang.org/genproto/googleapis/api/httpbody
+google.golang.org/genproto/googleapis/rpc/errdetails
 google.golang.org/genproto/googleapis/rpc/status
+google.golang.org/genproto/protobuf/field_mask
 # google.golang.org/grpc v1.38.0
 ## explicit
 google.golang.org/grpc
@@ -435,6 +489,7 @@ google.golang.org/grpc/codes
 google.golang.org/grpc/connectivity
 google.golang.org/grpc/credentials
 google.golang.org/grpc/encoding
+google.golang.org/grpc/encoding/gzip
 google.golang.org/grpc/encoding/proto
 google.golang.org/grpc/grpclog
 google.golang.org/grpc/health
@@ -471,12 +526,14 @@ google.golang.org/grpc/status
 google.golang.org/grpc/tap
 # google.golang.org/protobuf v1.26.0
 ## explicit
+google.golang.org/protobuf/encoding/protojson
 google.golang.org/protobuf/encoding/prototext
 google.golang.org/protobuf/encoding/protowire
 google.golang.org/protobuf/internal/descfmt
 google.golang.org/protobuf/internal/descopts
 google.golang.org/protobuf/internal/detrand
 google.golang.org/protobuf/internal/encoding/defval
+google.golang.org/protobuf/internal/encoding/json
 google.golang.org/protobuf/internal/encoding/messageset
 google.golang.org/protobuf/internal/encoding/tag
 google.golang.org/protobuf/internal/encoding/text
@@ -501,6 +558,7 @@ google.golang.org/protobuf/types/descriptorpb
 google.golang.org/protobuf/types/known/anypb
 google.golang.org/protobuf/types/known/durationpb
 google.golang.org/protobuf/types/known/timestamppb
+google.golang.org/protobuf/types/known/wrapperspb
 # gopkg.in/inf.v0 v0.9.1
 gopkg.in/inf.v0
 # gopkg.in/square/go-jose.v2 v2.5.1