Merge pull request #9845 from dcantah/prometheus-middleware-deprecated

Replace go-grpc-prometheus with go-grpc-middleware/providers/prometheus

cmd/containerd/server/server.go

@@ -37,9 +37,9 @@ import (
 	"github.com/containerd/log"
 	"github.com/containerd/ttrpc"
 	"github.com/docker/go-metrics"
-	grpc_middleware "github.com/grpc-ecosystem/go-grpc-middleware"
+	grpc_prometheus "github.com/grpc-ecosystem/go-grpc-middleware/providers/prometheus"
-	grpc_prometheus "github.com/grpc-ecosystem/go-grpc-prometheus"
 	v1 "github.com/opencontainers/image-spec/specs-go/v1"
+	"github.com/prometheus/client_golang/prometheus"
 	"go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/backoff"
@@ -144,16 +144,25 @@ func New(ctx context.Context, config *srvconfig.Config) (*Server, error) {
 		diff.RegisterProcessor(diff.BinaryHandler(id, p.Returns, p.Accepts, p.Path, p.Args, p.Env))
 	}
 
+	var prometheusServerMetricsOpts []grpc_prometheus.ServerMetricsOption
+	if config.Metrics.GRPCHistogram {
+		// Enable grpc time histograms to measure rpc latencies
+		prometheusServerMetricsOpts = append(prometheusServerMetricsOpts, grpc_prometheus.WithServerHandlingTimeHistogram())
+	}
+
+	prometheusServerMetrics := grpc_prometheus.NewServerMetrics(prometheusServerMetricsOpts...)
+	prometheus.MustRegister(prometheusServerMetrics)
+
 	serverOpts := []grpc.ServerOption{
 		grpc.StatsHandler(otelgrpc.NewServerHandler()),
-		grpc.StreamInterceptor(grpc_middleware.ChainStreamServer(
+		grpc.ChainStreamInterceptor(
-			grpc_prometheus.StreamServerInterceptor,
 			streamNamespaceInterceptor,
-		)),
+			prometheusServerMetrics.StreamServerInterceptor(),
-		grpc.UnaryInterceptor(grpc_middleware.ChainUnaryServer(
+		),
-			grpc_prometheus.UnaryServerInterceptor,
+		grpc.ChainUnaryInterceptor(
 			unaryNamespaceInterceptor,
-		)),
+			prometheusServerMetrics.UnaryServerInterceptor(),
+		),
 	}
 	if config.GRPC.MaxRecvMsgSize > 0 {
 		serverOpts = append(serverOpts, grpc.MaxRecvMsgSize(config.GRPC.MaxRecvMsgSize))
@@ -213,10 +222,11 @@ func New(ctx context.Context, config *srvconfig.Config) (*Server, error) {
 		ttrpcServices []ttrpcService
 
 		s = &Server{
-			grpcServer:  grpcServer,
+			prometheusServerMetrics: prometheusServerMetrics,
-			tcpServer:   tcpServer,
+			grpcServer:              grpcServer,
-			ttrpcServer: ttrpcServer,
+			tcpServer:               tcpServer,
-			config:      config,
+			ttrpcServer:             ttrpcServer,
+			config:                  config,
 		}
 		initialized = plugin.NewPluginSet()
 		required    = make(map[string]struct{})
@@ -364,24 +374,18 @@ func recordConfigDeprecations(ctx context.Context, config *srvconfig.Config, set
 
 // Server is the containerd main daemon
 type Server struct {
-	grpcServer  *grpc.Server
+	prometheusServerMetrics *grpc_prometheus.ServerMetrics
-	ttrpcServer *ttrpc.Server
+	grpcServer              *grpc.Server
-	tcpServer   *grpc.Server
+	ttrpcServer             *ttrpc.Server
-	config      *srvconfig.Config
+	tcpServer               *grpc.Server
-	plugins     []*plugin.Plugin
+	config                  *srvconfig.Config
-	ready       sync.WaitGroup
+	plugins                 []*plugin.Plugin
+	ready                   sync.WaitGroup
 }
 
 // ServeGRPC provides the containerd grpc APIs on the provided listener
 func (s *Server) ServeGRPC(l net.Listener) error {
-	if s.config.Metrics.GRPCHistogram {
+	s.prometheusServerMetrics.InitializeMetrics(s.grpcServer)
-		// enable grpc time histograms to measure rpc latencies
-		grpc_prometheus.EnableHandlingTimeHistogram()
-	}
-	// before we start serving the grpc API register the grpc_prometheus metrics
-	// handler.  This needs to be the last service registered so that it can collect
-	// metrics for every other service
-	grpc_prometheus.Register(s.grpcServer)
 	return trapClosedConnErr(s.grpcServer.Serve(l))
 }
 
@@ -403,7 +407,7 @@ func (s *Server) ServeMetrics(l net.Listener) error {
 
 // ServeTCP allows services to serve over tcp
 func (s *Server) ServeTCP(l net.Listener) error {
-	grpc_prometheus.Register(s.tcpServer)
+	s.prometheusServerMetrics.InitializeMetrics(s.tcpServer)
 	return trapClosedConnErr(s.tcpServer.Serve(l))
 }
 

go.mod

@@ -33,8 +33,7 @@ require (
 	github.com/fsnotify/fsnotify v1.7.0
 	github.com/google/go-cmp v0.6.0
 	github.com/google/uuid v1.6.0
-	github.com/grpc-ecosystem/go-grpc-middleware v1.4.0
+	github.com/grpc-ecosystem/go-grpc-middleware/providers/prometheus v1.0.0
-	github.com/grpc-ecosystem/go-grpc-prometheus v1.2.0
 	github.com/intel/goresctrl v0.6.0
 	github.com/klauspost/compress v1.17.6
 	github.com/minio/sha256-simd v1.0.1
@@ -98,6 +97,7 @@ require (
 	github.com/golang/protobuf v1.5.3 // indirect
 	github.com/google/gofuzz v1.2.0 // indirect
 	github.com/gorilla/websocket v1.5.0 // indirect
+	github.com/grpc-ecosystem/go-grpc-middleware/v2 v2.0.0-rc.3 // indirect
 	github.com/grpc-ecosystem/grpc-gateway/v2 v2.19.0 // indirect
 	github.com/hashicorp/errwrap v1.1.0 // indirect
 	github.com/json-iterator/go v1.1.12 // indirect

go.sum

@@ -1,16 +1,49 @@
-cloud.google.com/go v0.26.0 h1:e0WKqKTd5BnrG8aKH3J3h+QvEIQtSUcf2n5UZ5ZgLtQ=
 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=
+cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU=
+cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU=
+cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY=
+cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc=
+cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0=
+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/go.mod h1:1rq2OEkV3YMf6n/9ZvGWI3GWw0VoqH/1x2nd8Is/bPc=
+cloud.google.com/go v0.56.0/go.mod h1:jr7tqZxxKOVYizybht9+26Z/gUq7tiRzu+ACVAMbKVk=
+cloud.google.com/go v0.57.0/go.mod h1:oXiQ6Rzq3RAkkY7N6t3TcE6jE+CIBBbA36lwQ1JyzZs=
+cloud.google.com/go v0.62.0/go.mod h1:jmCYTdRCQuc1PHIIJ/maLInMho30T/Y0M4hTdTShOYc=
+cloud.google.com/go v0.65.0 h1:Dg9iHVQfrhq82rUNu9ZxUDrJLaxFUe/HlCVaLyRruq8=
+cloud.google.com/go v0.65.0/go.mod h1:O5N8zS7uWy9vkA9vayVHs65eM1ubvY4h553ofrNHObY=
+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=
+cloud.google.com/go/bigquery v1.4.0/go.mod h1:S8dzgnTigyfTmLBfrtrhyYhwRxG72rYxvftPBK2Dvzc=
+cloud.google.com/go/bigquery v1.5.0/go.mod h1:snEHRnqQbz117VIFhE8bmtwIDY80NLUZUMb4Nv6dBIg=
+cloud.google.com/go/bigquery v1.7.0/go.mod h1://okPTzCYNXSlb24MZs83e2Do+h+VXtc4gLoIoXIAPc=
+cloud.google.com/go/bigquery v1.8.0/go.mod h1:J5hqkt3O0uAFnINi6JXValWIb1v0goeZM77hZzJN/fQ=
 cloud.google.com/go/compute v1.23.3 h1:6sVlXXBmbd7jNX0Ipq0trII3e4n1/MsADLK6a+aiVlk=
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+cloud.google.com/go/pubsub v1.0.1/go.mod h1:R0Gpsv3s54REJCy4fxDixWD93lHJMoZTyQ2kNxGRt3I=
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+cloud.google.com/go/storage v1.8.0/go.mod h1:Wv1Oy7z6Yz3DshWRJFhqM/UCfaWIRTdp0RXyy7KQOVs=
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 github.com/AdaLogics/go-fuzz-headers v0.0.0-20230811130428-ced1acdcaa24/go.mod h1:8o94RPi1/7XTJvwPpRSzSUedZrtlirdB3r9Z20bi2f8=
 github.com/AdamKorcz/go-118-fuzz-build v0.0.0-20230306123547-8075edf89bb0 h1:59MxjQVfjXsBpLy+dbd2/ELV5ofnUkUZBvWSC85sheA=
 github.com/AdamKorcz/go-118-fuzz-build v0.0.0-20230306123547-8075edf89bb0/go.mod h1:OahwfttHWG6eJ0clwcfBAHoDI6X/LV/15hx/wlMZSrU=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
 github.com/Microsoft/go-winio v0.6.1 h1:9/kr64B9VUZrLm5YYwbGtUJnMgqWVOdUAXu6Migciow=
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@@ -19,7 +52,6 @@ github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuy
 github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
 github.com/armon/go-socks5 v0.0.0-20160902184237-e75332964ef5 h1:0CwZNZbxp69SHPdPJAN/hZIm0C4OItdklCFmMRWYpio=
 github.com/armon/go-socks5 v0.0.0-20160902184237-e75332964ef5/go.mod h1:wHh0iHkYZB8zMSxRWpUBQtwG5a7fFgvEO+odwuTv2gs=
-github.com/benbjohnson/clock v1.1.0/go.mod h1:J11/hYXuz8f4ySSvYwY0FKfm+ezbsZBKZxNJlLklBHA=
 github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
 github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+CedLV8=
 github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
@@ -38,6 +70,7 @@ github.com/cilium/ebpf v0.11.0 h1:V8gS/bTCCjX9uUnkUFUpPsksM8n1lXBAvHcpiFk1X2Y=
 github.com/cilium/ebpf v0.11.0/go.mod h1:WE7CZAnqOL2RouJ4f1uyNhqr2P4CCvXFIqdRDUgWsVs=
 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/cncf/xds/go v0.0.0-20231109132714-523115ebc101 h1:7To3pQ+pZo0i3dsWEbinPNFs5gPSBOsJtx3wTT94VBY=
 github.com/cncf/xds/go v0.0.0-20231109132714-523115ebc101/go.mod h1:eXthEFrGJvWHgFFCl3hGmgk+/aYT6PnTQLykKQRLhEs=
 github.com/containerd/btrfs/v2 v2.0.0 h1:FN4wsx7KQrYoLXN7uLP0vBV4oVWHOIKDRQ1G2Z0oL5M=
@@ -92,6 +125,7 @@ github.com/emicklei/go-restful/v3 v3.11.0/go.mod h1:6n3XBCmQQb25CM2LCACGz8ukIrRr
 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/envoyproxy/protoc-gen-validate v1.0.2 h1:QkIBuU5k+x7/QXPvPPnWXWlCdaBFApVqftFV6k087DA=
 github.com/envoyproxy/protoc-gen-validate v1.0.2/go.mod h1:GpiZQP3dDbg4JouG/NNS7QWXpgx6x8QiMKdmN72jogE=
@@ -103,11 +137,12 @@ github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMo
 github.com/fsnotify/fsnotify v1.4.9/go.mod h1:znqG4EE+3YCdAaPaxE2ZRY/06pZUdp0tY4IgpuI1SZQ=
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+github.com/go-gl/glfw v0.0.0-20190409004039-e6da0acd62b1/go.mod h1:vR7hzQXu2zJy9AVAgeJqvqgH9Q5CA+iKCZ2gyEVpxRU=
+github.com/go-gl/glfw/v3.3/glfw v0.0.0-20191125211704-12ad95a8df72/go.mod h1:tQ2UAYgL5IevRw8kRxooKSPJfGvJ9fJQFa0TUsXzTg8=
+github.com/go-gl/glfw/v3.3/glfw v0.0.0-20200222043503-6f7a984d4dc4/go.mod h1:tQ2UAYgL5IevRw8kRxooKSPJfGvJ9fJQFa0TUsXzTg8=
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-github.com/go-kit/log v0.1.0/go.mod h1:zbhenjAZHb184qTLMA9ZjW7ThYL0H2mk7Q6pNt4vbaY=
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@@ -131,14 +166,24 @@ github.com/gogo/protobuf v1.1.1/go.mod h1:r8qH/GZQm5c6nD/R0oafs1akxWv10x8SbQlK7a
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@@ -151,13 +196,17 @@ github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaS
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@@ -166,20 +215,32 @@ github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeN
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@@ -187,7 +248,10 @@ github.com/hashicorp/errwrap v1.1.0 h1:OxrOeh75EUXMY8TBjag2fzXGZ40LB6IKw45YeGUDY
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@@ -197,6 +261,8 @@ github.com/json-iterator/go v1.1.6/go.mod h1:+SdeFBvtyEkXs7REEP0seUULqWtbJapLOCV
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@@ -274,11 +340,9 @@ github.com/opencontainers/runtime-tools v0.9.1-0.20221107090550-2e043c6bd626/go.
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@@ -302,12 +366,12 @@ github.com/prometheus/procfs v0.0.2/go.mod h1:TjEm7ze935MbeOT/UhFTIMYKhuLP4wbCsT
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@@ -349,11 +413,18 @@ github.com/xeipuuv/gojsonschema v1.2.0 h1:LhYJRs+L4fBtjZUfuSZIKGeVu0QRy8e5Xi7D17
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 go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.48.0 h1:P+/g8GpuJGYbOp2tAdKrIPUX9JO02q8Q0YNlHolpibA=
@@ -376,24 +447,45 @@ go.opentelemetry.io/otel/trace v1.23.1 h1:4LrmmEd8AU2rFvU1zegmvqW7+kWarxtNOPyeL6
 go.opentelemetry.io/otel/trace v1.23.1/go.mod h1:4IpnpJFwr1mo/6HL8XIPJaE9y0+u1KcVmuW7dwFSVrI=
 go.opentelemetry.io/proto/otlp v1.1.0 h1:2Di21piLrCqJ3U3eXGCTPHE9R8Nh+0uglSnOyxikMeI=
 go.opentelemetry.io/proto/otlp v1.1.0/go.mod h1:GpBHCBWiqvVLDqmHZsoMM3C5ySeKTC7ej/RNTae6MdY=
-go.uber.org/atomic v1.7.0/go.mod h1:fEN4uk6kAWBTFdckzkM89CLk9XfWZrxpCo0nPH17wJc=
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@@ -403,28 +495,56 @@ golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73r
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@@ -434,18 +554,37 @@ golang.org/x/sys v0.0.0-20180905080454-ebe1bf3edb33/go.mod h1:STP8DvDyc/dI5b8T5h
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@@ -504,13 +728,22 @@ google.golang.org/genproto/googleapis/api v0.0.0-20240102182953-50ed04b92917/go.
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+google.golang.org/grpc/examples v0.0.0-20210424002626-9572fd6faeae/go.mod h1:Ly7ZA/ARzg8fnPU9TyZIxoz33sEUuWX7txiqs8lPTgE=
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@@ -519,6 +752,7 @@ google.golang.org/protobuf v1.21.0/go.mod h1:47Nbq4nVaFHyn7ilMalzfO3qCViNmqZ2kzi
 google.golang.org/protobuf v1.22.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
 google.golang.org/protobuf v1.23.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
 google.golang.org/protobuf v1.23.1-0.20200526195155-81db48ad09cc/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
+google.golang.org/protobuf v1.24.0/go.mod h1:r/3tXBNzIEhYS9I1OUVjXDlt8tc493IdKGjtUeSXeh4=
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 google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
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@@ -530,6 +764,7 @@ gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8
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+gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
 gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
 gopkg.in/inf.v0 v0.9.1 h1:73M5CoZyi3ZLMOyDlQh031Cx6N9NDJ2Vvfl76EDAgDc=
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@@ -542,11 +777,15 @@ gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
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 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
-gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
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+honnef.co/go/tools v0.0.1-2020.1.3/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
+honnef.co/go/tools v0.0.1-2020.1.4/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
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@@ -567,6 +806,9 @@ k8s.io/kubelet v0.29.1 h1:cso8Dk8dymkj8q+EvW/aCbIYU2aOkH27gho48tYza/8=
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vendor/github.com/grpc-ecosystem/go-grpc-middleware/.gitignore

@@ -1,204 +0,0 @@
-# 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/
-
-.envrc

vendor/github.com/grpc-ecosystem/go-grpc-middleware/CONTRIBUTING.md

@@ -1,20 +0,0 @@
-# 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.

vendor/github.com/grpc-ecosystem/go-grpc-middleware/README.md

@@ -1,93 +0,0 @@
-# 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](https://img.shields.io/badge/slack-%23grpc--middleware-brightgreen)](https://gophers.slack.com/archives/CNJL30P4P)
-
-[gRPC Go](https://github.com/grpc/grpc-go) Middleware: interceptors, helpers, utilities.
-
-## ⚠️  Status
-
-Version [v2](https://github.com/grpc-ecosystem/go-grpc-middleware/tree/v2) is about to be released, with migration guide, which will replace v1. Try v2 and give us feedback! 
-
-Version v1 is currently in deprecation mode, which means only critical and safety bug fixes will be merged.
-
-
-## 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 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.
-- [`grpc_kit`](logging/kit/) - integration of [go-kit/log](https://github.com/go-kit/log) logging library into gRPC handlers.
-- [`grpc_grpc_logsettable`](logging/settable/) - a wrapper around `grpclog.LoggerV2` that allows to replace loggers in runtime (thread-safe).
-
-#### 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
-- [`otelgrpc`](https://github.com/open-telemetry/opentelemetry-go-contrib/tree/main/instrumentation/google.golang.org/grpc/otelgrpc) - [OpenTelemetry](https://opentelemetry.io/) client-side and server-side interceptors
-
-#### 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
-- [`ratelimit`](ratelimit/) - grpc rate limiting by your own limiter
-
-
-## License
-
-`go-grpc-middleware` is released under the Apache 2.0 license. See the [LICENSE](LICENSE) file for details.

vendor/github.com/grpc-ecosystem/go-grpc-middleware/chain.go

@@ -1,166 +0,0 @@
-// Copyright 2016 Michal Witkowski. All Rights Reserved.
-// See LICENSE for licensing terms.
-
-// gRPC Server Interceptor chaining middleware.
-
-package grpc_middleware
-
-import (
-	"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.
-//
-// While this can be useful in some scenarios, it is generally advisable to use google.golang.org/grpc.ChainUnaryInterceptor directly.
-func ChainUnaryServer(interceptors ...grpc.UnaryServerInterceptor) grpc.UnaryServerInterceptor {
-	n := len(interceptors)
-
-	// Dummy interceptor maintained for backward compatibility to avoid returning nil.
-	if n == 0 {
-		return func(ctx context.Context, req interface{}, _ *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (interface{}, error) {
-			return handler(ctx, req)
-		}
-	}
-
-	// The degenerate case, just return the single wrapped interceptor directly.
-	if n == 1 {
-		return interceptors[0]
-	}
-
-	// Return a function which satisfies the interceptor interface, and which is
-	// a closure over the given list of interceptors to be chained.
-	return func(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (interface{}, error) {
-		currHandler := handler
-		// Iterate backwards through all interceptors except the first (outermost).
-		// Wrap each one in a function which satisfies the handler interface, but
-		// is also a closure over the `info` and `handler` parameters. Then pass
-		// each pseudo-handler to the next outer interceptor as the handler to be called.
-		for i := n - 1; i > 0; i-- {
-			// Rebind to loop-local vars so they can be closed over.
-			innerHandler, i := currHandler, i
-			currHandler = func(currentCtx context.Context, currentReq interface{}) (interface{}, error) {
-				return interceptors[i](currentCtx, currentReq, info, innerHandler)
-			}
-		}
-		// Finally return the result of calling the outermost interceptor with the
-		// outermost pseudo-handler created above as its handler.
-		return interceptors[0](ctx, req, info, currHandler)
-	}
-}
-
-// 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.
-//
-// While this can be useful in some scenarios, it is generally advisable to use google.golang.org/grpc.ChainStreamInterceptor directly.
-func ChainStreamServer(interceptors ...grpc.StreamServerInterceptor) grpc.StreamServerInterceptor {
-	n := len(interceptors)
-
-	// Dummy interceptor maintained for backward compatibility to avoid returning nil.
-	if n == 0 {
-		return func(srv interface{}, stream grpc.ServerStream, _ *grpc.StreamServerInfo, handler grpc.StreamHandler) error {
-			return handler(srv, stream)
-		}
-	}
-
-	if n == 1 {
-		return interceptors[0]
-	}
-
-	return func(srv interface{}, stream grpc.ServerStream, info *grpc.StreamServerInfo, handler grpc.StreamHandler) error {
-		currHandler := handler
-		for i := n - 1; i > 0; i-- {
-			innerHandler, i := currHandler, i
-			currHandler = func(currentSrv interface{}, currentStream grpc.ServerStream) error {
-				return interceptors[i](currentSrv, currentStream, info, innerHandler)
-			}
-		}
-		return interceptors[0](srv, stream, info, currHandler)
-	}
-}
-
-// 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)
-
-	// Dummy interceptor maintained for backward compatibility to avoid returning nil.
-	if n == 0 {
-		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...)
-		}
-	}
-
-	if n == 1 {
-		return interceptors[0]
-	}
-
-	return func(ctx context.Context, method string, req, reply interface{}, cc *grpc.ClientConn, invoker grpc.UnaryInvoker, opts ...grpc.CallOption) error {
-		currInvoker := invoker
-		for i := n - 1; i > 0; i-- {
-			innerInvoker, i := currInvoker, i
-			currInvoker = func(currentCtx context.Context, currentMethod string, currentReq, currentRepl interface{}, currentConn *grpc.ClientConn, currentOpts ...grpc.CallOption) error {
-				return interceptors[i](currentCtx, currentMethod, currentReq, currentRepl, currentConn, innerInvoker, currentOpts...)
-			}
-		}
-		return interceptors[0](ctx, method, req, reply, cc, currInvoker, 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)
-
-	// Dummy interceptor maintained for backward compatibility to avoid returning nil.
-	if n == 0 {
-		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...)
-		}
-	}
-
-	if n == 1 {
-		return interceptors[0]
-	}
-
-	return func(ctx context.Context, desc *grpc.StreamDesc, cc *grpc.ClientConn, method string, streamer grpc.Streamer, opts ...grpc.CallOption) (grpc.ClientStream, error) {
-		currStreamer := streamer
-		for i := n - 1; i > 0; i-- {
-			innerStreamer, i := currStreamer, i
-			currStreamer = func(currentCtx context.Context, currentDesc *grpc.StreamDesc, currentConn *grpc.ClientConn, currentMethod string, currentOpts ...grpc.CallOption) (grpc.ClientStream, error) {
-				return interceptors[i](currentCtx, currentDesc, currentConn, currentMethod, innerStreamer, currentOpts...)
-			}
-		}
-		return interceptors[0](ctx, desc, cc, method, currStreamer, 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.
-//
-// Deprecated: use google.golang.org/grpc.ChainUnaryInterceptor instead.
-func WithUnaryServerChain(interceptors ...grpc.UnaryServerInterceptor) grpc.ServerOption {
-	return grpc.ChainUnaryInterceptor(interceptors...)
-}
-
-// WithStreamServerChain is a grpc.Server config option that accepts multiple stream interceptors.
-// Basically syntactic sugar.
-//
-// Deprecated: use google.golang.org/grpc.ChainStreamInterceptor instead.
-func WithStreamServerChain(interceptors ...grpc.StreamServerInterceptor) grpc.ServerOption {
-	return grpc.ChainStreamInterceptor(interceptors...)
-}

vendor/github.com/grpc-ecosystem/go-grpc-middleware/doc.go

@@ -1,69 +0,0 @@
-// 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, newStream)
-	}
-*/
-package grpc_middleware

vendor/github.com/grpc-ecosystem/go-grpc-middleware/makefile

@@ -1,17 +0,0 @@
-SHELL=/bin/bash
-
-GOFILES_NOVENDOR = $(shell go list ./... | grep -v /vendor/)
-
-all: vet fmt test
-
-fmt:
-	go fmt $(GOFILES_NOVENDOR)
-
-vet:
-	# do not check lostcancel, they are intentional.
-	go vet -lostcancel=false $(GOFILES_NOVENDOR)
-
-test: vet
-	./scripts/test_all.sh
-
-.PHONY: all test

vendor/github.com/grpc-ecosystem/go-grpc-middleware/providers/prometheus/client_metrics.go

@@ -0,0 +1,117 @@
+// Copyright (c) The go-grpc-middleware Authors.
+// Licensed under the Apache License 2.0.
+
+package prometheus
+
+import (
+	"github.com/grpc-ecosystem/go-grpc-middleware/v2/interceptors"
+	"github.com/prometheus/client_golang/prometheus"
+	"google.golang.org/grpc"
+)
+
+// ClientMetrics represents a collection of metrics to be registered on a
+// Prometheus metrics registry for a gRPC client.
+type ClientMetrics struct {
+	clientStartedCounter    *prometheus.CounterVec
+	clientHandledCounter    *prometheus.CounterVec
+	clientStreamMsgReceived *prometheus.CounterVec
+	clientStreamMsgSent     *prometheus.CounterVec
+
+	// clientHandledHistogram can be nil
+	clientHandledHistogram *prometheus.HistogramVec
+	// clientStreamRecvHistogram can be nil
+	clientStreamRecvHistogram *prometheus.HistogramVec
+	// clientStreamSendHistogram can be nil
+	clientStreamSendHistogram *prometheus.HistogramVec
+}
+
+// NewClientMetrics returns a new ClientMetrics object.
+// NOTE: Remember to register ClientMetrics object using prometheus registry
+// e.g. prometheus.MustRegister(myClientMetrics).
+func NewClientMetrics(opts ...ClientMetricsOption) *ClientMetrics {
+	var config clientMetricsConfig
+	config.apply(opts)
+	return &ClientMetrics{
+		clientStartedCounter: prometheus.NewCounterVec(
+			config.counterOpts.apply(prometheus.CounterOpts{
+				Name: "grpc_client_started_total",
+				Help: "Total number of RPCs started on the client.",
+			}), []string{"grpc_type", "grpc_service", "grpc_method"}),
+
+		clientHandledCounter: prometheus.NewCounterVec(
+			config.counterOpts.apply(prometheus.CounterOpts{
+				Name: "grpc_client_handled_total",
+				Help: "Total number of RPCs completed by the client, regardless of success or failure.",
+			}), []string{"grpc_type", "grpc_service", "grpc_method", "grpc_code"}),
+
+		clientStreamMsgReceived: prometheus.NewCounterVec(
+			config.counterOpts.apply(prometheus.CounterOpts{
+				Name: "grpc_client_msg_received_total",
+				Help: "Total number of RPC stream messages received by the client.",
+			}), []string{"grpc_type", "grpc_service", "grpc_method"}),
+
+		clientStreamMsgSent: prometheus.NewCounterVec(
+			config.counterOpts.apply(prometheus.CounterOpts{
+				Name: "grpc_client_msg_sent_total",
+				Help: "Total number of gRPC stream messages sent by the client.",
+			}), []string{"grpc_type", "grpc_service", "grpc_method"}),
+
+		clientHandledHistogram:    config.clientHandledHistogram,
+		clientStreamRecvHistogram: config.clientStreamRecvHistogram,
+		clientStreamSendHistogram: config.clientStreamSendHistogram,
+	}
+}
+
+// Describe sends the super-set of all possible descriptors of metrics
+// collected by this Collector to the provided channel and returns once
+// the last descriptor has been sent.
+func (m *ClientMetrics) Describe(ch chan<- *prometheus.Desc) {
+	m.clientStartedCounter.Describe(ch)
+	m.clientHandledCounter.Describe(ch)
+	m.clientStreamMsgReceived.Describe(ch)
+	m.clientStreamMsgSent.Describe(ch)
+	if m.clientHandledHistogram != nil {
+		m.clientHandledHistogram.Describe(ch)
+	}
+	if m.clientStreamRecvHistogram != nil {
+		m.clientStreamRecvHistogram.Describe(ch)
+	}
+	if m.clientStreamSendHistogram != nil {
+		m.clientStreamSendHistogram.Describe(ch)
+	}
+}
+
+// Collect is called by the Prometheus registry when collecting
+// metrics. The implementation sends each collected metric via the
+// provided channel and returns once the last metric has been sent.
+func (m *ClientMetrics) Collect(ch chan<- prometheus.Metric) {
+	m.clientStartedCounter.Collect(ch)
+	m.clientHandledCounter.Collect(ch)
+	m.clientStreamMsgReceived.Collect(ch)
+	m.clientStreamMsgSent.Collect(ch)
+	if m.clientHandledHistogram != nil {
+		m.clientHandledHistogram.Collect(ch)
+	}
+	if m.clientStreamRecvHistogram != nil {
+		m.clientStreamRecvHistogram.Collect(ch)
+	}
+	if m.clientStreamSendHistogram != nil {
+		m.clientStreamSendHistogram.Collect(ch)
+	}
+}
+
+// UnaryClientInterceptor is a gRPC client-side interceptor that provides Prometheus monitoring for Unary RPCs.
+func (m *ClientMetrics) UnaryClientInterceptor(opts ...Option) grpc.UnaryClientInterceptor {
+	return interceptors.UnaryClientInterceptor(&reportable{
+		opts:          opts,
+		clientMetrics: m,
+	})
+}
+
+// StreamClientInterceptor is a gRPC client-side interceptor that provides Prometheus monitoring for Streaming RPCs.
+func (m *ClientMetrics) StreamClientInterceptor(opts ...Option) grpc.StreamClientInterceptor {
+	return interceptors.StreamClientInterceptor(&reportable{
+		opts:          opts,
+		clientMetrics: m,
+	})
+}

vendor/github.com/grpc-ecosystem/go-grpc-middleware/providers/prometheus/client_options.go

@@ -0,0 +1,77 @@
+// Copyright (c) The go-grpc-middleware Authors.
+// Licensed under the Apache License 2.0.
+
+package prometheus
+
+import (
+	"github.com/prometheus/client_golang/prometheus"
+)
+
+type clientMetricsConfig struct {
+	counterOpts counterOptions
+	// clientHandledHistogram can be nil.
+	clientHandledHistogram *prometheus.HistogramVec
+	// clientStreamRecvHistogram can be nil.
+	clientStreamRecvHistogram *prometheus.HistogramVec
+	// clientStreamSendHistogram can be nil.
+	clientStreamSendHistogram *prometheus.HistogramVec
+}
+
+type ClientMetricsOption func(*clientMetricsConfig)
+
+func (c *clientMetricsConfig) apply(opts []ClientMetricsOption) {
+	for _, o := range opts {
+		o(c)
+	}
+}
+
+func WithClientCounterOptions(opts ...CounterOption) ClientMetricsOption {
+	return func(o *clientMetricsConfig) {
+		o.counterOpts = opts
+	}
+}
+
+// WithClientHandlingTimeHistogram turns on recording of handling time of RPCs.
+// Histogram metrics can be very expensive for Prometheus to retain and query.
+func WithClientHandlingTimeHistogram(opts ...HistogramOption) ClientMetricsOption {
+	return func(o *clientMetricsConfig) {
+		o.clientHandledHistogram = prometheus.NewHistogramVec(
+			histogramOptions(opts).apply(prometheus.HistogramOpts{
+				Name:    "grpc_client_handling_seconds",
+				Help:    "Histogram of response latency (seconds) of the gRPC until it is finished by the application.",
+				Buckets: prometheus.DefBuckets,
+			}),
+			[]string{"grpc_type", "grpc_service", "grpc_method"},
+		)
+	}
+}
+
+// WithClientStreamRecvHistogram turns on recording of single message receive time of streaming RPCs.
+// Histogram metrics can be very expensive for Prometheus to retain and query.
+func WithClientStreamRecvHistogram(opts ...HistogramOption) ClientMetricsOption {
+	return func(o *clientMetricsConfig) {
+		o.clientStreamRecvHistogram = prometheus.NewHistogramVec(
+			histogramOptions(opts).apply(prometheus.HistogramOpts{
+				Name:    "grpc_client_msg_recv_handling_seconds",
+				Help:    "Histogram of response latency (seconds) of the gRPC single message receive.",
+				Buckets: prometheus.DefBuckets,
+			}),
+			[]string{"grpc_type", "grpc_service", "grpc_method"},
+		)
+	}
+}
+
+// WithClientStreamSendHistogram turns on recording of single message send time of streaming RPCs.
+// Histogram metrics can be very expensive for Prometheus to retain and query.
+func WithClientStreamSendHistogram(opts ...HistogramOption) ClientMetricsOption {
+	return func(o *clientMetricsConfig) {
+		o.clientStreamSendHistogram = prometheus.NewHistogramVec(
+			histogramOptions(opts).apply(prometheus.HistogramOpts{
+				Name:    "grpc_client_msg_send_handling_seconds",
+				Help:    "Histogram of response latency (seconds) of the gRPC single message send.",
+				Buckets: prometheus.DefBuckets,
+			}),
+			[]string{"grpc_type", "grpc_service", "grpc_method"},
+		)
+	}
+}

vendor/github.com/grpc-ecosystem/go-grpc-middleware/providers/prometheus/constants.go

@@ -0,0 +1,23 @@
+// Copyright (c) The go-grpc-middleware Authors.
+// Licensed under the Apache License 2.0.
+
+package prometheus
+
+type grpcType string
+
+// grpcType describes all types of grpc connection.
+const (
+	Unary        grpcType = "unary"
+	ClientStream grpcType = "client_stream"
+	ServerStream grpcType = "server_stream"
+	BidiStream   grpcType = "bidi_stream"
+)
+
+// Kind describes whether interceptor is a client or server type.
+type Kind string
+
+// Enum for Client and Server Kind.
+const (
+	KindClient Kind = "client"
+	KindServer Kind = "server"
+)

vendor/github.com/grpc-ecosystem/go-grpc-middleware/providers/prometheus/doc.go

@@ -0,0 +1,8 @@
+// Copyright (c) The go-grpc-middleware Authors.
+// Licensed under the Apache License 2.0.
+
+/*
+Package prometheus provides a standalone interceptor for metrics. It's next iteration of deprecated https://github.com/grpc-ecosystem/go-grpc-prometheus.
+See https://github.com/grpc-ecosystem/go-grpc-middleware/tree/main/examples for example.
+*/
+package prometheus

vendor/github.com/grpc-ecosystem/go-grpc-middleware/providers/prometheus/options.go

@@ -0,0 +1,129 @@
+// Copyright (c) The go-grpc-middleware Authors.
+// Licensed under the Apache License 2.0.
+
+package prometheus
+
+import (
+	"github.com/prometheus/client_golang/prometheus"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/status"
+)
+
+// FromError returns a grpc status. If the error code is neither a valid grpc status nor a context error, codes.Unknown
+// will be set.
+func FromError(err error) *status.Status {
+	s, ok := status.FromError(err)
+	// Mirror what the grpc server itself does, i.e. also convert context errors to status
+	if !ok {
+		s = status.FromContextError(err)
+	}
+	return s
+}
+
+// A CounterOption lets you add options to Counter metrics using With* funcs.
+type CounterOption func(*prometheus.CounterOpts)
+
+type counterOptions []CounterOption
+
+func (co counterOptions) apply(o prometheus.CounterOpts) prometheus.CounterOpts {
+	for _, f := range co {
+		f(&o)
+	}
+	return o
+}
+
+// WithConstLabels allows you to add ConstLabels to Counter metrics.
+func WithConstLabels(labels prometheus.Labels) CounterOption {
+	return func(o *prometheus.CounterOpts) {
+		o.ConstLabels = labels
+	}
+}
+
+// WithSubsystem allows you to add a Subsystem to Counter metrics.
+func WithSubsystem(subsystem string) CounterOption {
+	return func(o *prometheus.CounterOpts) {
+		o.Subsystem = subsystem
+	}
+}
+
+// A HistogramOption lets you add options to Histogram metrics using With*
+// funcs.
+type HistogramOption func(*prometheus.HistogramOpts)
+
+type histogramOptions []HistogramOption
+
+func (ho histogramOptions) apply(o prometheus.HistogramOpts) prometheus.HistogramOpts {
+	for _, f := range ho {
+		f(&o)
+	}
+	return o
+}
+
+// WithHistogramBuckets allows you to specify custom bucket ranges for histograms if EnableHandlingTimeHistogram is on.
+func WithHistogramBuckets(buckets []float64) HistogramOption {
+	return func(o *prometheus.HistogramOpts) { o.Buckets = buckets }
+}
+
+// WithHistogramOpts allows you to specify HistogramOpts but makes sure the correct name and label is used.
+// This function is helpful when specifying more than just the buckets, like using NativeHistograms.
+func WithHistogramOpts(opts *prometheus.HistogramOpts) HistogramOption {
+	// TODO: This isn't ideal either if new fields are added to prometheus.HistogramOpts.
+	// Maybe we can change the interface to accept abitrary HistogramOpts and
+	// only make sure to overwrite the necessary fields (name, labels).
+	return func(o *prometheus.HistogramOpts) {
+		o.Buckets = opts.Buckets
+		o.NativeHistogramBucketFactor = opts.NativeHistogramBucketFactor
+		o.NativeHistogramZeroThreshold = opts.NativeHistogramZeroThreshold
+		o.NativeHistogramMaxBucketNumber = opts.NativeHistogramMaxBucketNumber
+		o.NativeHistogramMinResetDuration = opts.NativeHistogramMinResetDuration
+		o.NativeHistogramMaxZeroThreshold = opts.NativeHistogramMaxZeroThreshold
+	}
+}
+
+// WithHistogramConstLabels allows you to add custom ConstLabels to
+// histograms metrics.
+func WithHistogramConstLabels(labels prometheus.Labels) HistogramOption {
+	return func(o *prometheus.HistogramOpts) {
+		o.ConstLabels = labels
+	}
+}
+
+// WithHistogramSubsystem allows you to add a Subsystem to histograms metrics.
+func WithHistogramSubsystem(subsystem string) HistogramOption {
+	return func(o *prometheus.HistogramOpts) {
+		o.Subsystem = subsystem
+	}
+}
+
+func typeFromMethodInfo(mInfo *grpc.MethodInfo) grpcType {
+	if !mInfo.IsClientStream && !mInfo.IsServerStream {
+		return Unary
+	}
+	if mInfo.IsClientStream && !mInfo.IsServerStream {
+		return ClientStream
+	}
+	if !mInfo.IsClientStream && mInfo.IsServerStream {
+		return ServerStream
+	}
+	return BidiStream
+}
+
+// An Option lets you add options to prometheus interceptors using With* funcs.
+type Option func(*config)
+
+type config struct {
+	exemplarFn exemplarFromCtxFn
+}
+
+func (c *config) apply(opts []Option) {
+	for _, o := range opts {
+		o(c)
+	}
+}
+
+// WithExemplarFromContext sets function that will be used to deduce exemplar for all counter and histogram metrics.
+func WithExemplarFromContext(exemplarFn exemplarFromCtxFn) Option {
+	return func(o *config) {
+		o.exemplarFn = exemplarFn
+	}
+}

vendor/github.com/grpc-ecosystem/go-grpc-middleware/providers/prometheus/reporter.go

@@ -0,0 +1,113 @@
+// Copyright (c) The go-grpc-middleware Authors.
+// Licensed under the Apache License 2.0.
+
+package prometheus
+
+import (
+	"context"
+	"time"
+
+	"github.com/grpc-ecosystem/go-grpc-middleware/v2/interceptors"
+	"github.com/prometheus/client_golang/prometheus"
+)
+
+type reporter struct {
+	clientMetrics   *ClientMetrics
+	serverMetrics   *ServerMetrics
+	typ             interceptors.GRPCType
+	service, method string
+	kind            Kind
+	exemplar        prometheus.Labels
+}
+
+func (r *reporter) PostCall(err error, rpcDuration time.Duration) {
+	// get status code from error
+	status := FromError(err)
+	code := status.Code()
+
+	// perform handling of metrics from code
+	switch r.kind {
+	case KindServer:
+		r.incrementWithExemplar(r.serverMetrics.serverHandledCounter, string(r.typ), r.service, r.method, code.String())
+		if r.serverMetrics.serverHandledHistogram != nil {
+			r.observeWithExemplar(r.serverMetrics.serverHandledHistogram, rpcDuration.Seconds(), string(r.typ), r.service, r.method)
+		}
+
+	case KindClient:
+		r.incrementWithExemplar(r.clientMetrics.clientHandledCounter, string(r.typ), r.service, r.method, code.String())
+		if r.clientMetrics.clientHandledHistogram != nil {
+			r.observeWithExemplar(r.clientMetrics.clientHandledHistogram, rpcDuration.Seconds(), string(r.typ), r.service, r.method)
+		}
+	}
+}
+
+func (r *reporter) PostMsgSend(_ any, _ error, sendDuration time.Duration) {
+	switch r.kind {
+	case KindServer:
+		r.incrementWithExemplar(r.serverMetrics.serverStreamMsgSent, string(r.typ), r.service, r.method)
+	case KindClient:
+		r.incrementWithExemplar(r.clientMetrics.clientStreamMsgSent, string(r.typ), r.service, r.method)
+		if r.clientMetrics.clientStreamSendHistogram != nil {
+			r.observeWithExemplar(r.clientMetrics.clientStreamSendHistogram, sendDuration.Seconds(), string(r.typ), r.service, r.method)
+		}
+	}
+}
+
+func (r *reporter) PostMsgReceive(_ any, _ error, recvDuration time.Duration) {
+	switch r.kind {
+	case KindServer:
+		r.incrementWithExemplar(r.serverMetrics.serverStreamMsgReceived, string(r.typ), r.service, r.method)
+	case KindClient:
+		r.incrementWithExemplar(r.clientMetrics.clientStreamMsgReceived, string(r.typ), r.service, r.method)
+		if r.clientMetrics.clientStreamRecvHistogram != nil {
+			r.observeWithExemplar(r.clientMetrics.clientStreamRecvHistogram, recvDuration.Seconds(), string(r.typ), r.service, r.method)
+		}
+	}
+}
+
+type reportable struct {
+	clientMetrics *ClientMetrics
+	serverMetrics *ServerMetrics
+
+	opts []Option
+}
+
+func (rep *reportable) ServerReporter(ctx context.Context, meta interceptors.CallMeta) (interceptors.Reporter, context.Context) {
+	return rep.reporter(ctx, rep.serverMetrics, nil, meta, KindServer)
+}
+
+func (rep *reportable) ClientReporter(ctx context.Context, meta interceptors.CallMeta) (interceptors.Reporter, context.Context) {
+	return rep.reporter(ctx, nil, rep.clientMetrics, meta, KindClient)
+}
+
+func (rep *reportable) reporter(ctx context.Context, sm *ServerMetrics, cm *ClientMetrics, meta interceptors.CallMeta, kind Kind) (interceptors.Reporter, context.Context) {
+	var c config
+	c.apply(rep.opts)
+	r := &reporter{
+		clientMetrics: cm,
+		serverMetrics: sm,
+		typ:           meta.Typ,
+		service:       meta.Service,
+		method:        meta.Method,
+		kind:          kind,
+	}
+	if c.exemplarFn != nil {
+		r.exemplar = c.exemplarFn(ctx)
+	}
+
+	switch kind {
+	case KindClient:
+		r.incrementWithExemplar(r.clientMetrics.clientStartedCounter, string(r.typ), r.service, r.method)
+	case KindServer:
+		r.incrementWithExemplar(r.serverMetrics.serverStartedCounter, string(r.typ), r.service, r.method)
+	}
+	return r, ctx
+}
+
+func (r *reporter) incrementWithExemplar(c *prometheus.CounterVec, lvals ...string) {
+	c.WithLabelValues(lvals...).(prometheus.ExemplarAdder).AddWithExemplar(1, r.exemplar)
+}
+
+func (r *reporter) observeWithExemplar(h *prometheus.HistogramVec, value float64, lvals ...string) {
+	h.WithLabelValues(lvals...).(prometheus.ExemplarObserver).ObserveWithExemplar(value, r.exemplar)
+}

vendor/github.com/grpc-ecosystem/go-grpc-middleware/providers/prometheus/server_metrics.go

@@ -0,0 +1,123 @@
+// Copyright (c) The go-grpc-middleware Authors.
+// Licensed under the Apache License 2.0.
+
+package prometheus
+
+import (
+	"github.com/grpc-ecosystem/go-grpc-middleware/v2/interceptors"
+	"github.com/prometheus/client_golang/prometheus"
+	"google.golang.org/grpc"
+)
+
+// ServerMetrics represents a collection of metrics to be registered on a
+// Prometheus metrics registry for a gRPC server.
+type ServerMetrics struct {
+	serverStartedCounter    *prometheus.CounterVec
+	serverHandledCounter    *prometheus.CounterVec
+	serverStreamMsgReceived *prometheus.CounterVec
+	serverStreamMsgSent     *prometheus.CounterVec
+	// serverHandledHistogram can be nil.
+	serverHandledHistogram *prometheus.HistogramVec
+}
+
+// NewServerMetrics returns a new ServerMetrics object that has server interceptor methods.
+// NOTE: Remember to register ServerMetrics object by using prometheus registry
+// e.g. prometheus.MustRegister(myServerMetrics).
+func NewServerMetrics(opts ...ServerMetricsOption) *ServerMetrics {
+	var config serverMetricsConfig
+	config.apply(opts)
+	return &ServerMetrics{
+		serverStartedCounter: prometheus.NewCounterVec(
+			config.counterOpts.apply(prometheus.CounterOpts{
+				Name: "grpc_server_started_total",
+				Help: "Total number of RPCs started on the server.",
+			}), []string{"grpc_type", "grpc_service", "grpc_method"}),
+		serverHandledCounter: prometheus.NewCounterVec(
+			config.counterOpts.apply(prometheus.CounterOpts{
+				Name: "grpc_server_handled_total",
+				Help: "Total number of RPCs completed on the server, regardless of success or failure.",
+			}), []string{"grpc_type", "grpc_service", "grpc_method", "grpc_code"}),
+		serverStreamMsgReceived: prometheus.NewCounterVec(
+			config.counterOpts.apply(prometheus.CounterOpts{
+				Name: "grpc_server_msg_received_total",
+				Help: "Total number of RPC stream messages received on the server.",
+			}), []string{"grpc_type", "grpc_service", "grpc_method"}),
+		serverStreamMsgSent: prometheus.NewCounterVec(
+			config.counterOpts.apply(prometheus.CounterOpts{
+				Name: "grpc_server_msg_sent_total",
+				Help: "Total number of gRPC stream messages sent by the server.",
+			}), []string{"grpc_type", "grpc_service", "grpc_method"}),
+		serverHandledHistogram: config.serverHandledHistogram,
+	}
+}
+
+// Describe sends the super-set of all possible descriptors of metrics
+// collected by this Collector to the provided channel and returns once
+// the last descriptor has been sent.
+func (m *ServerMetrics) Describe(ch chan<- *prometheus.Desc) {
+	m.serverStartedCounter.Describe(ch)
+	m.serverHandledCounter.Describe(ch)
+	m.serverStreamMsgReceived.Describe(ch)
+	m.serverStreamMsgSent.Describe(ch)
+	if m.serverHandledHistogram != nil {
+		m.serverHandledHistogram.Describe(ch)
+	}
+}
+
+// Collect is called by the Prometheus registry when collecting
+// metrics. The implementation sends each collected metric via the
+// provided channel and returns once the last metric has been sent.
+func (m *ServerMetrics) Collect(ch chan<- prometheus.Metric) {
+	m.serverStartedCounter.Collect(ch)
+	m.serverHandledCounter.Collect(ch)
+	m.serverStreamMsgReceived.Collect(ch)
+	m.serverStreamMsgSent.Collect(ch)
+	if m.serverHandledHistogram != nil {
+		m.serverHandledHistogram.Collect(ch)
+	}
+}
+
+// InitializeMetrics initializes all metrics, with their appropriate null
+// value, for all gRPC methods registered on a gRPC server. This is useful, to
+// ensure that all metrics exist when collecting and querying.
+// NOTE: This might add significant cardinality and might not be needed in future version of Prometheus (created timestamp).
+func (m *ServerMetrics) InitializeMetrics(server *grpc.Server) {
+	serviceInfo := server.GetServiceInfo()
+	for serviceName, info := range serviceInfo {
+		for _, mInfo := range info.Methods {
+			m.preRegisterMethod(serviceName, &mInfo)
+		}
+	}
+}
+
+// preRegisterMethod is invoked on Register of a Server, allowing all gRPC services labels to be pre-populated.
+func (m *ServerMetrics) preRegisterMethod(serviceName string, mInfo *grpc.MethodInfo) {
+	methodName := mInfo.Name
+	methodType := string(typeFromMethodInfo(mInfo))
+	// These are just references (no increments), as just referencing will create the labels but not set values.
+	_, _ = m.serverStartedCounter.GetMetricWithLabelValues(methodType, serviceName, methodName)
+	_, _ = m.serverStreamMsgReceived.GetMetricWithLabelValues(methodType, serviceName, methodName)
+	_, _ = m.serverStreamMsgSent.GetMetricWithLabelValues(methodType, serviceName, methodName)
+	if m.serverHandledHistogram != nil {
+		_, _ = m.serverHandledHistogram.GetMetricWithLabelValues(methodType, serviceName, methodName)
+	}
+	for _, code := range interceptors.AllCodes {
+		_, _ = m.serverHandledCounter.GetMetricWithLabelValues(methodType, serviceName, methodName, code.String())
+	}
+}
+
+// UnaryServerInterceptor is a gRPC server-side interceptor that provides Prometheus monitoring for Unary RPCs.
+func (m *ServerMetrics) UnaryServerInterceptor(opts ...Option) grpc.UnaryServerInterceptor {
+	return interceptors.UnaryServerInterceptor(&reportable{
+		opts:          opts,
+		serverMetrics: m,
+	})
+}
+
+// StreamServerInterceptor is a gRPC server-side interceptor that provides Prometheus monitoring for Streaming RPCs.
+func (m *ServerMetrics) StreamServerInterceptor(opts ...Option) grpc.StreamServerInterceptor {
+	return interceptors.StreamServerInterceptor(&reportable{
+		opts:          opts,
+		serverMetrics: m,
+	})
+}

vendor/github.com/grpc-ecosystem/go-grpc-middleware/providers/prometheus/server_options.go

@@ -0,0 +1,48 @@
+// Copyright (c) The go-grpc-middleware Authors.
+// Licensed under the Apache License 2.0.
+
+package prometheus
+
+import (
+	"context"
+
+	"github.com/prometheus/client_golang/prometheus"
+)
+
+type exemplarFromCtxFn func(ctx context.Context) prometheus.Labels
+
+type serverMetricsConfig struct {
+	counterOpts counterOptions
+	// serverHandledHistogram can be nil.
+	serverHandledHistogram *prometheus.HistogramVec
+}
+
+type ServerMetricsOption func(*serverMetricsConfig)
+
+func (c *serverMetricsConfig) apply(opts []ServerMetricsOption) {
+	for _, o := range opts {
+		o(c)
+	}
+}
+
+// WithServerCounterOptions sets counter options.
+func WithServerCounterOptions(opts ...CounterOption) ServerMetricsOption {
+	return func(o *serverMetricsConfig) {
+		o.counterOpts = opts
+	}
+}
+
+// WithServerHandlingTimeHistogram turns on recording of handling time of RPCs.
+// Histogram metrics can be very expensive for Prometheus to retain and query.
+func WithServerHandlingTimeHistogram(opts ...HistogramOption) ServerMetricsOption {
+	return func(o *serverMetricsConfig) {
+		o.serverHandledHistogram = prometheus.NewHistogramVec(
+			histogramOptions(opts).apply(prometheus.HistogramOpts{
+				Name:    "grpc_server_handling_seconds",
+				Help:    "Histogram of response latency (seconds) of gRPC that had been application-level handled by the server.",
+				Buckets: prometheus.DefBuckets,
+			}),
+			[]string{"grpc_type", "grpc_service", "grpc_method"},
+		)
+	}
+}

vendor/github.com/grpc-ecosystem/go-grpc-middleware/v2/COPYRIGHT

@@ -0,0 +1,2 @@
+Copyright (c) The go-grpc-middleware Authors.
+Licensed under the Apache License 2.0.

vendor/github.com/grpc-ecosystem/go-grpc-middleware/v2/interceptors/client.go

@@ -0,0 +1,83 @@
+// Copyright (c) The go-grpc-middleware Authors.
+// Licensed under the Apache License 2.0.
+
+// Go gRPC Middleware monitoring interceptors for client-side gRPC.
+
+package interceptors
+
+import (
+	"context"
+	"io"
+	"time"
+
+	"google.golang.org/grpc"
+)
+
+// UnaryClientInterceptor is a gRPC client-side interceptor that provides reporting for Unary RPCs.
+func UnaryClientInterceptor(reportable ClientReportable) grpc.UnaryClientInterceptor {
+	return func(ctx context.Context, method string, req, reply interface{}, cc *grpc.ClientConn, invoker grpc.UnaryInvoker, opts ...grpc.CallOption) error {
+		r := newReport(Unary, method)
+		reporter, newCtx := reportable.ClientReporter(ctx, CallMeta{ReqProtoOrNil: req, Typ: r.rpcType, Service: r.service, Method: r.method})
+
+		reporter.PostMsgSend(req, nil, time.Since(r.startTime))
+		err := invoker(newCtx, method, req, reply, cc, opts...)
+		reporter.PostMsgReceive(reply, err, time.Since(r.startTime))
+		reporter.PostCall(err, time.Since(r.startTime))
+		return err
+	}
+}
+
+// StreamClientInterceptor is a gRPC client-side interceptor that provides reporting for Stream RPCs.
+func StreamClientInterceptor(reportable ClientReportable) grpc.StreamClientInterceptor {
+	return func(ctx context.Context, desc *grpc.StreamDesc, cc *grpc.ClientConn, method string, streamer grpc.Streamer, opts ...grpc.CallOption) (grpc.ClientStream, error) {
+		r := newReport(clientStreamType(desc), method)
+		reporter, newCtx := reportable.ClientReporter(ctx, CallMeta{ReqProtoOrNil: nil, Typ: r.rpcType, Service: r.service, Method: r.method})
+
+		clientStream, err := streamer(newCtx, desc, cc, method, opts...)
+		if err != nil {
+			reporter.PostCall(err, time.Since(r.startTime))
+			return nil, err
+		}
+		return &monitoredClientStream{ClientStream: clientStream, startTime: r.startTime, reporter: reporter}, nil
+	}
+}
+
+func clientStreamType(desc *grpc.StreamDesc) GRPCType {
+	if desc.ClientStreams && !desc.ServerStreams {
+		return ClientStream
+	} else if !desc.ClientStreams && desc.ServerStreams {
+		return ServerStream
+	}
+	return BidiStream
+}
+
+// monitoredClientStream wraps grpc.ClientStream allowing each Sent/Recv of message to report.
+type monitoredClientStream struct {
+	grpc.ClientStream
+
+	startTime time.Time
+	reporter  Reporter
+}
+
+func (s *monitoredClientStream) SendMsg(m interface{}) error {
+	start := time.Now()
+	err := s.ClientStream.SendMsg(m)
+	s.reporter.PostMsgSend(m, err, time.Since(start))
+	return err
+}
+
+func (s *monitoredClientStream) RecvMsg(m interface{}) error {
+	start := time.Now()
+	err := s.ClientStream.RecvMsg(m)
+	s.reporter.PostMsgReceive(m, err, time.Since(start))
+
+	if err == nil {
+		return nil
+	}
+	var postErr error
+	if err != io.EOF {
+		postErr = err
+	}
+	s.reporter.PostCall(postErr, time.Since(s.startTime))
+	return err
+}

vendor/github.com/grpc-ecosystem/go-grpc-middleware/v2/interceptors/doc.go

@@ -0,0 +1,12 @@
+// Copyright (c) The go-grpc-middleware Authors.
+// Licensed under the Apache License 2.0.
+
+//
+/*
+interceptor is an internal package used by higher level middlewares. It allows injecting custom code in various
+places of the gRPC lifecycle.
+
+This particular package is intended for use by other middleware, metric, logging or otherwise.
+This allows code to be shared between different implementations.
+*/
+package interceptors

vendor/github.com/grpc-ecosystem/go-grpc-middleware/v2/interceptors/reporter.go

@@ -0,0 +1,116 @@
+// Copyright (c) The go-grpc-middleware Authors.
+// Licensed under the Apache License 2.0.
+
+package interceptors
+
+import (
+	"context"
+	"fmt"
+	"strings"
+	"time"
+
+	"google.golang.org/grpc/codes"
+)
+
+type GRPCType string
+
+// Timer is a helper interface to time functions.
+// Useful for interceptors to record the total
+// time elapsed since completion of a call.
+type Timer interface {
+	ObserveDuration() time.Duration
+}
+
+// zeroTimer.
+type zeroTimer struct {
+}
+
+func (zeroTimer) ObserveDuration() time.Duration {
+	return 0
+}
+
+var EmptyTimer = &zeroTimer{}
+
+const (
+	Unary        GRPCType = "unary"
+	ClientStream GRPCType = "client_stream"
+	ServerStream GRPCType = "server_stream"
+	BidiStream   GRPCType = "bidi_stream"
+)
+
+var (
+	AllCodes = []codes.Code{
+		codes.OK, codes.Canceled, codes.Unknown, codes.InvalidArgument, codes.DeadlineExceeded, codes.NotFound,
+		codes.AlreadyExists, codes.PermissionDenied, codes.Unauthenticated, codes.ResourceExhausted,
+		codes.FailedPrecondition, codes.Aborted, codes.OutOfRange, codes.Unimplemented, codes.Internal,
+		codes.Unavailable, codes.DataLoss,
+	}
+)
+
+func SplitMethodName(fullMethod string) (string, string) {
+	fullMethod = strings.TrimPrefix(fullMethod, "/") // remove leading slash
+	if i := strings.Index(fullMethod, "/"); i >= 0 {
+		return fullMethod[:i], fullMethod[i+1:]
+	}
+	return "unknown", "unknown"
+}
+
+type CallMeta struct {
+	ReqProtoOrNil interface{}
+	Typ           GRPCType
+	Service       string
+	Method        string
+}
+
+func (c CallMeta) FullMethod() string {
+	return fmt.Sprintf("/%s/%s", c.Service, c.Method)
+}
+
+type ClientReportable interface {
+	ClientReporter(context.Context, CallMeta) (Reporter, context.Context)
+}
+
+type ServerReportable interface {
+	ServerReporter(context.Context, CallMeta) (Reporter, context.Context)
+}
+
+// CommonReportableFunc helper allows an easy way to implement reporter with common client and server logic.
+type CommonReportableFunc func(ctx context.Context, c CallMeta, isClient bool) (Reporter, context.Context)
+
+func (f CommonReportableFunc) ClientReporter(ctx context.Context, c CallMeta) (Reporter, context.Context) {
+	return f(ctx, c, true)
+}
+
+func (f CommonReportableFunc) ServerReporter(ctx context.Context, c CallMeta) (Reporter, context.Context) {
+	return f(ctx, c, false)
+}
+
+type Reporter interface {
+	PostCall(err error, rpcDuration time.Duration)
+	PostMsgSend(reqProto interface{}, err error, sendDuration time.Duration)
+	PostMsgReceive(replyProto interface{}, err error, recvDuration time.Duration)
+}
+
+var _ Reporter = NoopReporter{}
+
+type NoopReporter struct{}
+
+func (NoopReporter) PostCall(error, time.Duration)                    {}
+func (NoopReporter) PostMsgSend(interface{}, error, time.Duration)    {}
+func (NoopReporter) PostMsgReceive(interface{}, error, time.Duration) {}
+
+type report struct {
+	rpcType   GRPCType
+	service   string
+	method    string
+	startTime time.Time
+}
+
+func newReport(typ GRPCType, fullMethod string) report {
+	r := report{
+		startTime: time.Now(),
+		rpcType:   typ,
+	}
+	r.service, r.method = SplitMethodName(fullMethod)
+	return r
+}

vendor/github.com/grpc-ecosystem/go-grpc-middleware/v2/interceptors/server.go

@@ -0,0 +1,74 @@
+// Copyright (c) The go-grpc-middleware Authors.
+// Licensed under the Apache License 2.0.
+
+// Go gRPC Middleware monitoring interceptors for server-side gRPC.
+
+package interceptors
+
+import (
+	"context"
+	"time"
+
+	"google.golang.org/grpc"
+)
+
+// UnaryServerInterceptor is a gRPC server-side interceptor that provides reporting for Unary RPCs.
+func UnaryServerInterceptor(reportable ServerReportable) grpc.UnaryServerInterceptor {
+	return func(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (interface{}, error) {
+		r := newReport(Unary, info.FullMethod)
+		reporter, newCtx := reportable.ServerReporter(ctx, CallMeta{ReqProtoOrNil: req, Typ: r.rpcType, Service: r.service, Method: r.method})
+
+		reporter.PostMsgReceive(req, nil, time.Since(r.startTime))
+		resp, err := handler(newCtx, req)
+		reporter.PostMsgSend(resp, err, time.Since(r.startTime))
+
+		reporter.PostCall(err, time.Since(r.startTime))
+		return resp, err
+	}
+}
+
+// StreamServerInterceptor is a gRPC server-side interceptor that provides reporting for Streaming RPCs.
+func StreamServerInterceptor(reportable ServerReportable) grpc.StreamServerInterceptor {
+	return func(srv interface{}, ss grpc.ServerStream, info *grpc.StreamServerInfo, handler grpc.StreamHandler) error {
+		r := newReport(ServerStream, info.FullMethod)
+		reporter, newCtx := reportable.ServerReporter(ss.Context(), CallMeta{ReqProtoOrNil: nil, Typ: StreamRPCType(info), Service: r.service, Method: r.method})
+		err := handler(srv, &monitoredServerStream{ServerStream: ss, newCtx: newCtx, reporter: reporter})
+		reporter.PostCall(err, time.Since(r.startTime))
+		return err
+	}
+}
+
+func StreamRPCType(info *grpc.StreamServerInfo) GRPCType {
+	if info.IsClientStream && !info.IsServerStream {
+		return ClientStream
+	} else if !info.IsClientStream && info.IsServerStream {
+		return ServerStream
+	}
+	return BidiStream
+}
+
+// monitoredStream wraps grpc.ServerStream allowing each Sent/Recv of message to report.
+type monitoredServerStream struct {
+	grpc.ServerStream
+
+	newCtx   context.Context
+	reporter Reporter
+}
+
+func (s *monitoredServerStream) Context() context.Context {
+	return s.newCtx
+}
+
+func (s *monitoredServerStream) SendMsg(m interface{}) error {
+	start := time.Now()
+	err := s.ServerStream.SendMsg(m)
+	s.reporter.PostMsgSend(m, err, time.Since(start))
+	return err
+}
+
+func (s *monitoredServerStream) RecvMsg(m interface{}) error {
+	start := time.Now()
+	err := s.ServerStream.RecvMsg(m)
+	s.reporter.PostMsgReceive(m, err, time.Since(start))
+	return err
+}

vendor/github.com/grpc-ecosystem/go-grpc-middleware/wrappers.go

@@ -1,30 +0,0 @@
-// Copyright 2016 Michal Witkowski. All Rights Reserved.
-// See LICENSE for licensing terms.
-
-package grpc_middleware
-
-import (
-	"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()}
-}

vendor/github.com/grpc-ecosystem/go-grpc-prometheus/.gitignore

@@ -1,201 +0,0 @@
-#vendor
-vendor/
-
-# Created by .ignore support plugin (hsz.mobi)
-coverage.txt
-### 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/
-

vendor/github.com/grpc-ecosystem/go-grpc-prometheus/.travis.yml

@@ -1,25 +0,0 @@
-sudo: false
-language: go
-# * github.com/grpc/grpc-go still supports go1.6
-#   - When we drop support for go1.6 we can remove golang.org/x/net/context
-#     below as it is part of the Go std library since go1.7
-# * github.com/prometheus/client_golang already requires at least go1.7 since
-#   September 2017
-go:
-  - 1.6.x
-  - 1.7.x
-  - 1.8.x
-  - 1.9.x
-  - 1.10.x
-  - master
-
-install:
-  - go get github.com/prometheus/client_golang/prometheus
-  - go get google.golang.org/grpc
-  - go get golang.org/x/net/context
-  - go get github.com/stretchr/testify
-script:
- - make test 
-
-after_success:
-  - bash <(curl -s https://codecov.io/bash)

vendor/github.com/grpc-ecosystem/go-grpc-prometheus/CHANGELOG.md

@@ -1,24 +0,0 @@
-# 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).
-
-## [Unreleased]
-
-## [1.2.0](https://github.com/grpc-ecosystem/go-grpc-prometheus/releases/tag/v1.2.0) - 2018-06-04
-
-### Added
-
-* Provide metrics object as `prometheus.Collector`, for conventional metric registration.
-* Support non-default/global Prometheus registry.
-* Allow configuring counters with `prometheus.CounterOpts`.
-
-### Changed
-
-* Remove usage of deprecated `grpc.Code()`.
-* Remove usage of deprecated `grpc.Errorf` and replace with `status.Errorf`.
-
----
-
-This changelog was started with version `v1.2.0`, for earlier versions refer to the respective [GitHub releases](https://github.com/grpc-ecosystem/go-grpc-prometheus/releases).

vendor/github.com/grpc-ecosystem/go-grpc-prometheus/README.md

@@ -1,247 +0,0 @@
-# Go gRPC Interceptors for Prometheus monitoring 
-
-[![Travis Build](https://travis-ci.org/grpc-ecosystem/go-grpc-prometheus.svg)](https://travis-ci.org/grpc-ecosystem/go-grpc-prometheus)
-[![Go Report Card](https://goreportcard.com/badge/github.com/grpc-ecosystem/go-grpc-prometheus)](http://goreportcard.com/report/grpc-ecosystem/go-grpc-prometheus)
-[![GoDoc](http://img.shields.io/badge/GoDoc-Reference-blue.svg)](https://godoc.org/github.com/grpc-ecosystem/go-grpc-prometheus)
-[![SourceGraph](https://sourcegraph.com/github.com/grpc-ecosystem/go-grpc-prometheus/-/badge.svg)](https://sourcegraph.com/github.com/grpc-ecosystem/go-grpc-prometheus/?badge)
-[![codecov](https://codecov.io/gh/grpc-ecosystem/go-grpc-prometheus/branch/master/graph/badge.svg)](https://codecov.io/gh/grpc-ecosystem/go-grpc-prometheus)
-[![Apache 2.0 License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](LICENSE)
-
-[Prometheus](https://prometheus.io/) monitoring for your [gRPC Go](https://github.com/grpc/grpc-go) servers and clients.
-
-A sister implementation for [gRPC Java](https://github.com/grpc/grpc-java) (same metrics, same semantics) is in [grpc-ecosystem/java-grpc-prometheus](https://github.com/grpc-ecosystem/java-grpc-prometheus).
-
-## Interceptors
-
-[gRPC Go](https://github.com/grpc/grpc-go) recently acquired support for Interceptors, i.e. middleware that is executed
-by a gRPC Server before the request is passed onto the user's application logic. It is a perfect way to implement
-common patterns: auth, logging and... monitoring.
-
-To use Interceptors in chains, please see [`go-grpc-middleware`](https://github.com/mwitkow/go-grpc-middleware).
-
-## Usage
-
-There are two types of interceptors: client-side and server-side. This package provides monitoring Interceptors for both.
-
-### Server-side
-
-```go
-import "github.com/grpc-ecosystem/go-grpc-prometheus"
-...
-    // Initialize your gRPC server's interceptor.
-    myServer := grpc.NewServer(
-        grpc.StreamInterceptor(grpc_prometheus.StreamServerInterceptor),
-        grpc.UnaryInterceptor(grpc_prometheus.UnaryServerInterceptor),
-    )
-    // Register your gRPC service implementations.
-    myservice.RegisterMyServiceServer(s.server, &myServiceImpl{})
-    // After all your registrations, make sure all of the Prometheus metrics are initialized.
-    grpc_prometheus.Register(myServer)
-    // Register Prometheus metrics handler.    
-    http.Handle("/metrics", promhttp.Handler())
-...
-```
-
-### Client-side
-
-```go
-import "github.com/grpc-ecosystem/go-grpc-prometheus"
-...
-   clientConn, err = grpc.Dial(
-       address,
-		   grpc.WithUnaryInterceptor(grpc_prometheus.UnaryClientInterceptor),
-		   grpc.WithStreamInterceptor(grpc_prometheus.StreamClientInterceptor)
-   )
-   client = pb_testproto.NewTestServiceClient(clientConn)
-   resp, err := client.PingEmpty(s.ctx, &myservice.Request{Msg: "hello"})
-...
-```
-
-# Metrics
-
-## Labels
-
-All server-side metrics start with `grpc_server` as Prometheus subsystem name. All client-side metrics start with `grpc_client`. Both of them have mirror-concepts. Similarly all methods
-contain the same rich labels:
-  
-  * `grpc_service` - the [gRPC service](http://www.grpc.io/docs/#defining-a-service) name, which is the combination of protobuf `package` and
-    the `grpc_service` section name. E.g. for `package = mwitkow.testproto` and 
-     `service TestService` the label will be `grpc_service="mwitkow.testproto.TestService"`
-  * `grpc_method` - the name of the method called on the gRPC service. E.g.  
-    `grpc_method="Ping"`
-  * `grpc_type` - the gRPC [type of request](http://www.grpc.io/docs/guides/concepts.html#rpc-life-cycle). 
-    Differentiating between the two is important especially for latency measurements.
-
-     - `unary` is single request, single response RPC
-     - `client_stream` is a multi-request, single response RPC
-     - `server_stream` is a single request, multi-response RPC
-     - `bidi_stream` is a multi-request, multi-response RPC
-    
-
-Additionally for completed RPCs, the following labels are used:
-
-  * `grpc_code` - the human-readable [gRPC status code](https://github.com/grpc/grpc-go/blob/master/codes/codes.go).
-    The list of all statuses is to long, but here are some common ones:
-      
-      - `OK` - means the RPC was successful
-      - `IllegalArgument` - RPC contained bad values
-      - `Internal` - server-side error not disclosed to the clients
-      
-## Counters
-
-The counters and their up to date documentation is in [server_reporter.go](server_reporter.go) and [client_reporter.go](client_reporter.go) 
-the respective Prometheus handler (usually `/metrics`). 
-
-For the purpose of this documentation we will only discuss `grpc_server` metrics. The `grpc_client` ones contain mirror concepts.
-
-For simplicity, let's assume we're tracking a single server-side RPC call of [`mwitkow.testproto.TestService`](examples/testproto/test.proto),
-calling the method `PingList`. The call succeeds and returns 20 messages in the stream.
-
-First, immediately after the server receives the call it will increment the
-`grpc_server_started_total` and start the handling time clock (if histograms are enabled). 
-
-```jsoniq
-grpc_server_started_total{grpc_method="PingList",grpc_service="mwitkow.testproto.TestService",grpc_type="server_stream"} 1
-```
-
-Then the user logic gets invoked. It receives one message from the client containing the request 
-(it's a `server_stream`):
-
-```jsoniq
-grpc_server_msg_received_total{grpc_method="PingList",grpc_service="mwitkow.testproto.TestService",grpc_type="server_stream"} 1
-```
-
-The user logic may return an error, or send multiple messages back to the client. In this case, on 
-each of the 20 messages sent back, a counter will be incremented:
-
-```jsoniq
-grpc_server_msg_sent_total{grpc_method="PingList",grpc_service="mwitkow.testproto.TestService",grpc_type="server_stream"} 20
-```
-
-After the call completes, its status (`OK` or other [gRPC status code](https://github.com/grpc/grpc-go/blob/master/codes/codes.go)) 
-and the relevant call labels increment the `grpc_server_handled_total` counter.
-
-```jsoniq
-grpc_server_handled_total{grpc_code="OK",grpc_method="PingList",grpc_service="mwitkow.testproto.TestService",grpc_type="server_stream"} 1
-```
-
-## Histograms
-
-[Prometheus histograms](https://prometheus.io/docs/concepts/metric_types/#histogram) are a great way
-to measure latency distributions of your RPCs. However, since it is bad practice to have metrics
-of [high cardinality](https://prometheus.io/docs/practices/instrumentation/#do-not-overuse-labels)
-the latency monitoring metrics are disabled by default. To enable them please call the following
-in your server initialization code:
-
-```jsoniq
-grpc_prometheus.EnableHandlingTimeHistogram()
-```
-
-After the call completes, its handling time will be recorded in a [Prometheus histogram](https://prometheus.io/docs/concepts/metric_types/#histogram)
-variable `grpc_server_handling_seconds`. The histogram variable contains three sub-metrics:
-
- * `grpc_server_handling_seconds_count` - the count of all completed RPCs by status and method 
- * `grpc_server_handling_seconds_sum` - cumulative time of RPCs by status and method, useful for 
-   calculating average handling times
- * `grpc_server_handling_seconds_bucket` - contains the counts of RPCs by status and method in respective
-   handling-time buckets. These buckets can be used by Prometheus to estimate SLAs (see [here](https://prometheus.io/docs/practices/histograms/))
-
-The counter values will look as follows:
-
-```jsoniq
-grpc_server_handling_seconds_bucket{grpc_code="OK",grpc_method="PingList",grpc_service="mwitkow.testproto.TestService",grpc_type="server_stream",le="0.005"} 1
-grpc_server_handling_seconds_bucket{grpc_code="OK",grpc_method="PingList",grpc_service="mwitkow.testproto.TestService",grpc_type="server_stream",le="0.01"} 1
-grpc_server_handling_seconds_bucket{grpc_code="OK",grpc_method="PingList",grpc_service="mwitkow.testproto.TestService",grpc_type="server_stream",le="0.025"} 1
-grpc_server_handling_seconds_bucket{grpc_code="OK",grpc_method="PingList",grpc_service="mwitkow.testproto.TestService",grpc_type="server_stream",le="0.05"} 1
-grpc_server_handling_seconds_bucket{grpc_code="OK",grpc_method="PingList",grpc_service="mwitkow.testproto.TestService",grpc_type="server_stream",le="0.1"} 1
-grpc_server_handling_seconds_bucket{grpc_code="OK",grpc_method="PingList",grpc_service="mwitkow.testproto.TestService",grpc_type="server_stream",le="0.25"} 1
-grpc_server_handling_seconds_bucket{grpc_code="OK",grpc_method="PingList",grpc_service="mwitkow.testproto.TestService",grpc_type="server_stream",le="0.5"} 1
-grpc_server_handling_seconds_bucket{grpc_code="OK",grpc_method="PingList",grpc_service="mwitkow.testproto.TestService",grpc_type="server_stream",le="1"} 1
-grpc_server_handling_seconds_bucket{grpc_code="OK",grpc_method="PingList",grpc_service="mwitkow.testproto.TestService",grpc_type="server_stream",le="2.5"} 1
-grpc_server_handling_seconds_bucket{grpc_code="OK",grpc_method="PingList",grpc_service="mwitkow.testproto.TestService",grpc_type="server_stream",le="5"} 1
-grpc_server_handling_seconds_bucket{grpc_code="OK",grpc_method="PingList",grpc_service="mwitkow.testproto.TestService",grpc_type="server_stream",le="10"} 1
-grpc_server_handling_seconds_bucket{grpc_code="OK",grpc_method="PingList",grpc_service="mwitkow.testproto.TestService",grpc_type="server_stream",le="+Inf"} 1
-grpc_server_handling_seconds_sum{grpc_code="OK",grpc_method="PingList",grpc_service="mwitkow.testproto.TestService",grpc_type="server_stream"} 0.0003866430000000001
-grpc_server_handling_seconds_count{grpc_code="OK",grpc_method="PingList",grpc_service="mwitkow.testproto.TestService",grpc_type="server_stream"} 1
-```
-
-
-## Useful query examples
-
-Prometheus philosophy is to provide raw metrics to the monitoring system, and
-let the aggregations be handled there. The verbosity of above metrics make it possible to have that
-flexibility. Here's a couple of useful monitoring queries:
-
-
-### request inbound rate
-```jsoniq
-sum(rate(grpc_server_started_total{job="foo"}[1m])) by (grpc_service)
-```
-For `job="foo"` (common label to differentiate between Prometheus monitoring targets), calculate the
-rate of requests per second (1 minute window) for each gRPC `grpc_service` that the job has. Please note
-how the `grpc_method` is being omitted here: all methods of a given gRPC service will be summed together.
-
-### unary request error rate
-```jsoniq
-sum(rate(grpc_server_handled_total{job="foo",grpc_type="unary",grpc_code!="OK"}[1m])) by (grpc_service)
-```
-For `job="foo"`, calculate the per-`grpc_service` rate of `unary` (1:1) RPCs that failed, i.e. the 
-ones that didn't finish with `OK` code.
-
-### unary request error percentage
-```jsoniq
-sum(rate(grpc_server_handled_total{job="foo",grpc_type="unary",grpc_code!="OK"}[1m])) by (grpc_service)
- / 
-sum(rate(grpc_server_started_total{job="foo",grpc_type="unary"}[1m])) by (grpc_service)
- * 100.0
-```
-For `job="foo"`, calculate the percentage of failed requests by service. It's easy to notice that
-this is a combination of the two above examples. This is an example of a query you would like to
-[alert on](https://prometheus.io/docs/alerting/rules/) in your system for SLA violations, e.g.
-"no more than 1% requests should fail".
-
-### average response stream size
-```jsoniq
-sum(rate(grpc_server_msg_sent_total{job="foo",grpc_type="server_stream"}[10m])) by (grpc_service)
- /
-sum(rate(grpc_server_started_total{job="foo",grpc_type="server_stream"}[10m])) by (grpc_service)
-```
-For `job="foo"` what is the `grpc_service`-wide `10m` average of messages returned for all `
-server_stream` RPCs. This allows you to track the stream sizes returned by your system, e.g. allows 
-you to track when clients started to send "wide" queries that ret
-Note the divisor is the number of started RPCs, in order to account for in-flight requests.
-
-### 99%-tile latency of unary requests
-```jsoniq
-histogram_quantile(0.99, 
-  sum(rate(grpc_server_handling_seconds_bucket{job="foo",grpc_type="unary"}[5m])) by (grpc_service,le)
-)
-```
-For `job="foo"`, returns an 99%-tile [quantile estimation](https://prometheus.io/docs/practices/histograms/#quantiles)
-of the handling time of RPCs per service. Please note the `5m` rate, this means that the quantile
-estimation will take samples in a rolling `5m` window. When combined with other quantiles
-(e.g. 50%, 90%), this query gives you tremendous insight into the responsiveness of your system 
-(e.g. impact of caching).
-
-### percentage of slow unary queries (>250ms)
-```jsoniq
-100.0 - (
-sum(rate(grpc_server_handling_seconds_bucket{job="foo",grpc_type="unary",le="0.25"}[5m])) by (grpc_service)
- / 
-sum(rate(grpc_server_handling_seconds_count{job="foo",grpc_type="unary"}[5m])) by (grpc_service)
-) * 100.0
-```
-For `job="foo"` calculate the by-`grpc_service` fraction of slow requests that took longer than `0.25` 
-seconds. This query is relatively complex, since the Prometheus aggregations use `le` (less or equal)
-buckets, meaning that counting "fast" requests fractions is easier. However, simple maths helps.
-This is an example of a query you would like to alert on in your system for SLA violations, 
-e.g. "less than 1% of requests are slower than 250ms".
-
-
-## Status
-
-This code has been used since August 2015 as the basis for monitoring of *production* gRPC micro services  at [Improbable](https://improbable.io).
-
-## License
-
-`go-grpc-prometheus` is released under the Apache 2.0 license. See the [LICENSE](LICENSE) file for details.

vendor/github.com/grpc-ecosystem/go-grpc-prometheus/client.go

@@ -1,39 +0,0 @@
-// Copyright 2016 Michal Witkowski. All Rights Reserved.
-// See LICENSE for licensing terms.
-
-// gRPC Prometheus monitoring interceptors for client-side gRPC.
-
-package grpc_prometheus
-
-import (
-	prom "github.com/prometheus/client_golang/prometheus"
-)
-
-var (
-	// DefaultClientMetrics is the default instance of ClientMetrics. It is
-	// intended to be used in conjunction the default Prometheus metrics
-	// registry.
-	DefaultClientMetrics = NewClientMetrics()
-
-	// UnaryClientInterceptor is a gRPC client-side interceptor that provides Prometheus monitoring for Unary RPCs.
-	UnaryClientInterceptor = DefaultClientMetrics.UnaryClientInterceptor()
-
-	// StreamClientInterceptor is a gRPC client-side interceptor that provides Prometheus monitoring for Streaming RPCs.
-	StreamClientInterceptor = DefaultClientMetrics.StreamClientInterceptor()
-)
-
-func init() {
-	prom.MustRegister(DefaultClientMetrics.clientStartedCounter)
-	prom.MustRegister(DefaultClientMetrics.clientHandledCounter)
-	prom.MustRegister(DefaultClientMetrics.clientStreamMsgReceived)
-	prom.MustRegister(DefaultClientMetrics.clientStreamMsgSent)
-}
-
-// EnableClientHandlingTimeHistogram turns on recording of handling time of
-// RPCs. Histogram metrics can be very expensive for Prometheus to retain and
-// query. This function acts on the DefaultClientMetrics variable and the
-// default Prometheus metrics registry.
-func EnableClientHandlingTimeHistogram(opts ...HistogramOption) {
-	DefaultClientMetrics.EnableClientHandlingTimeHistogram(opts...)
-	prom.Register(DefaultClientMetrics.clientHandledHistogram)
-}

vendor/github.com/grpc-ecosystem/go-grpc-prometheus/client_metrics.go

@@ -1,170 +0,0 @@
-package grpc_prometheus
-
-import (
-	"io"
-
-	prom "github.com/prometheus/client_golang/prometheus"
-	"golang.org/x/net/context"
-	"google.golang.org/grpc"
-	"google.golang.org/grpc/codes"
-	"google.golang.org/grpc/status"
-)
-
-// ClientMetrics represents a collection of metrics to be registered on a
-// Prometheus metrics registry for a gRPC client.
-type ClientMetrics struct {
-	clientStartedCounter          *prom.CounterVec
-	clientHandledCounter          *prom.CounterVec
-	clientStreamMsgReceived       *prom.CounterVec
-	clientStreamMsgSent           *prom.CounterVec
-	clientHandledHistogramEnabled bool
-	clientHandledHistogramOpts    prom.HistogramOpts
-	clientHandledHistogram        *prom.HistogramVec
-}
-
-// NewClientMetrics returns a ClientMetrics object. Use a new instance of
-// ClientMetrics when not using the default Prometheus metrics registry, for
-// example when wanting to control which metrics are added to a registry as
-// opposed to automatically adding metrics via init functions.
-func NewClientMetrics(counterOpts ...CounterOption) *ClientMetrics {
-	opts := counterOptions(counterOpts)
-	return &ClientMetrics{
-		clientStartedCounter: prom.NewCounterVec(
-			opts.apply(prom.CounterOpts{
-				Name: "grpc_client_started_total",
-				Help: "Total number of RPCs started on the client.",
-			}), []string{"grpc_type", "grpc_service", "grpc_method"}),
-
-		clientHandledCounter: prom.NewCounterVec(
-			opts.apply(prom.CounterOpts{
-				Name: "grpc_client_handled_total",
-				Help: "Total number of RPCs completed by the client, regardless of success or failure.",
-			}), []string{"grpc_type", "grpc_service", "grpc_method", "grpc_code"}),
-
-		clientStreamMsgReceived: prom.NewCounterVec(
-			opts.apply(prom.CounterOpts{
-				Name: "grpc_client_msg_received_total",
-				Help: "Total number of RPC stream messages received by the client.",
-			}), []string{"grpc_type", "grpc_service", "grpc_method"}),
-
-		clientStreamMsgSent: prom.NewCounterVec(
-			opts.apply(prom.CounterOpts{
-				Name: "grpc_client_msg_sent_total",
-				Help: "Total number of gRPC stream messages sent by the client.",
-			}), []string{"grpc_type", "grpc_service", "grpc_method"}),
-
-		clientHandledHistogramEnabled: false,
-		clientHandledHistogramOpts: prom.HistogramOpts{
-			Name:    "grpc_client_handling_seconds",
-			Help:    "Histogram of response latency (seconds) of the gRPC until it is finished by the application.",
-			Buckets: prom.DefBuckets,
-		},
-		clientHandledHistogram: nil,
-	}
-}
-
-// Describe sends the super-set of all possible descriptors of metrics
-// collected by this Collector to the provided channel and returns once
-// the last descriptor has been sent.
-func (m *ClientMetrics) Describe(ch chan<- *prom.Desc) {
-	m.clientStartedCounter.Describe(ch)
-	m.clientHandledCounter.Describe(ch)
-	m.clientStreamMsgReceived.Describe(ch)
-	m.clientStreamMsgSent.Describe(ch)
-	if m.clientHandledHistogramEnabled {
-		m.clientHandledHistogram.Describe(ch)
-	}
-}
-
-// Collect is called by the Prometheus registry when collecting
-// metrics. The implementation sends each collected metric via the
-// provided channel and returns once the last metric has been sent.
-func (m *ClientMetrics) Collect(ch chan<- prom.Metric) {
-	m.clientStartedCounter.Collect(ch)
-	m.clientHandledCounter.Collect(ch)
-	m.clientStreamMsgReceived.Collect(ch)
-	m.clientStreamMsgSent.Collect(ch)
-	if m.clientHandledHistogramEnabled {
-		m.clientHandledHistogram.Collect(ch)
-	}
-}
-
-// EnableClientHandlingTimeHistogram turns on recording of handling time of RPCs.
-// Histogram metrics can be very expensive for Prometheus to retain and query.
-func (m *ClientMetrics) EnableClientHandlingTimeHistogram(opts ...HistogramOption) {
-	for _, o := range opts {
-		o(&m.clientHandledHistogramOpts)
-	}
-	if !m.clientHandledHistogramEnabled {
-		m.clientHandledHistogram = prom.NewHistogramVec(
-			m.clientHandledHistogramOpts,
-			[]string{"grpc_type", "grpc_service", "grpc_method"},
-		)
-	}
-	m.clientHandledHistogramEnabled = true
-}
-
-// UnaryClientInterceptor is a gRPC client-side interceptor that provides Prometheus monitoring for Unary RPCs.
-func (m *ClientMetrics) UnaryClientInterceptor() func(ctx context.Context, method string, req, reply interface{}, cc *grpc.ClientConn, invoker grpc.UnaryInvoker, opts ...grpc.CallOption) error {
-	return func(ctx context.Context, method string, req, reply interface{}, cc *grpc.ClientConn, invoker grpc.UnaryInvoker, opts ...grpc.CallOption) error {
-		monitor := newClientReporter(m, Unary, method)
-		monitor.SentMessage()
-		err := invoker(ctx, method, req, reply, cc, opts...)
-		if err != nil {
-			monitor.ReceivedMessage()
-		}
-		st, _ := status.FromError(err)
-		monitor.Handled(st.Code())
-		return err
-	}
-}
-
-// StreamClientInterceptor is a gRPC client-side interceptor that provides Prometheus monitoring for Streaming RPCs.
-func (m *ClientMetrics) StreamClientInterceptor() func(ctx context.Context, desc *grpc.StreamDesc, cc *grpc.ClientConn, method string, streamer grpc.Streamer, opts ...grpc.CallOption) (grpc.ClientStream, error) {
-	return func(ctx context.Context, desc *grpc.StreamDesc, cc *grpc.ClientConn, method string, streamer grpc.Streamer, opts ...grpc.CallOption) (grpc.ClientStream, error) {
-		monitor := newClientReporter(m, clientStreamType(desc), method)
-		clientStream, err := streamer(ctx, desc, cc, method, opts...)
-		if err != nil {
-			st, _ := status.FromError(err)
-			monitor.Handled(st.Code())
-			return nil, err
-		}
-		return &monitoredClientStream{clientStream, monitor}, nil
-	}
-}
-
-func clientStreamType(desc *grpc.StreamDesc) grpcType {
-	if desc.ClientStreams && !desc.ServerStreams {
-		return ClientStream
-	} else if !desc.ClientStreams && desc.ServerStreams {
-		return ServerStream
-	}
-	return BidiStream
-}
-
-// monitoredClientStream wraps grpc.ClientStream allowing each Sent/Recv of message to increment counters.
-type monitoredClientStream struct {
-	grpc.ClientStream
-	monitor *clientReporter
-}
-
-func (s *monitoredClientStream) SendMsg(m interface{}) error {
-	err := s.ClientStream.SendMsg(m)
-	if err == nil {
-		s.monitor.SentMessage()
-	}
-	return err
-}
-
-func (s *monitoredClientStream) RecvMsg(m interface{}) error {
-	err := s.ClientStream.RecvMsg(m)
-	if err == nil {
-		s.monitor.ReceivedMessage()
-	} else if err == io.EOF {
-		s.monitor.Handled(codes.OK)
-	} else {
-		st, _ := status.FromError(err)
-		s.monitor.Handled(st.Code())
-	}
-	return err
-}

vendor/github.com/grpc-ecosystem/go-grpc-prometheus/client_reporter.go

@@ -1,46 +0,0 @@
-// Copyright 2016 Michal Witkowski. All Rights Reserved.
-// See LICENSE for licensing terms.
-
-package grpc_prometheus
-
-import (
-	"time"
-
-	"google.golang.org/grpc/codes"
-)
-
-type clientReporter struct {
-	metrics     *ClientMetrics
-	rpcType     grpcType
-	serviceName string
-	methodName  string
-	startTime   time.Time
-}
-
-func newClientReporter(m *ClientMetrics, rpcType grpcType, fullMethod string) *clientReporter {
-	r := &clientReporter{
-		metrics: m,
-		rpcType: rpcType,
-	}
-	if r.metrics.clientHandledHistogramEnabled {
-		r.startTime = time.Now()
-	}
-	r.serviceName, r.methodName = splitMethodName(fullMethod)
-	r.metrics.clientStartedCounter.WithLabelValues(string(r.rpcType), r.serviceName, r.methodName).Inc()
-	return r
-}
-
-func (r *clientReporter) ReceivedMessage() {
-	r.metrics.clientStreamMsgReceived.WithLabelValues(string(r.rpcType), r.serviceName, r.methodName).Inc()
-}
-
-func (r *clientReporter) SentMessage() {
-	r.metrics.clientStreamMsgSent.WithLabelValues(string(r.rpcType), r.serviceName, r.methodName).Inc()
-}
-
-func (r *clientReporter) Handled(code codes.Code) {
-	r.metrics.clientHandledCounter.WithLabelValues(string(r.rpcType), r.serviceName, r.methodName, code.String()).Inc()
-	if r.metrics.clientHandledHistogramEnabled {
-		r.metrics.clientHandledHistogram.WithLabelValues(string(r.rpcType), r.serviceName, r.methodName).Observe(time.Since(r.startTime).Seconds())
-	}
-}

vendor/github.com/grpc-ecosystem/go-grpc-prometheus/makefile

@@ -1,16 +0,0 @@
-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 vet test

vendor/github.com/grpc-ecosystem/go-grpc-prometheus/metric_options.go

@@ -1,41 +0,0 @@
-package grpc_prometheus
-
-import (
-	prom "github.com/prometheus/client_golang/prometheus"
-)
-
-// A CounterOption lets you add options to Counter metrics using With* funcs.
-type CounterOption func(*prom.CounterOpts)
-
-type counterOptions []CounterOption
-
-func (co counterOptions) apply(o prom.CounterOpts) prom.CounterOpts {
-	for _, f := range co {
-		f(&o)
-	}
-	return o
-}
-
-// WithConstLabels allows you to add ConstLabels to Counter metrics.
-func WithConstLabels(labels prom.Labels) CounterOption {
-	return func(o *prom.CounterOpts) {
-		o.ConstLabels = labels
-	}
-}
-
-// A HistogramOption lets you add options to Histogram metrics using With*
-// funcs.
-type HistogramOption func(*prom.HistogramOpts)
-
-// WithHistogramBuckets allows you to specify custom bucket ranges for histograms if EnableHandlingTimeHistogram is on.
-func WithHistogramBuckets(buckets []float64) HistogramOption {
-	return func(o *prom.HistogramOpts) { o.Buckets = buckets }
-}
-
-// WithHistogramConstLabels allows you to add custom ConstLabels to
-// histograms metrics.
-func WithHistogramConstLabels(labels prom.Labels) HistogramOption {
-	return func(o *prom.HistogramOpts) {
-		o.ConstLabels = labels
-	}
-}

vendor/github.com/grpc-ecosystem/go-grpc-prometheus/server.go

@@ -1,48 +0,0 @@
-// Copyright 2016 Michal Witkowski. All Rights Reserved.
-// See LICENSE for licensing terms.
-
-// gRPC Prometheus monitoring interceptors for server-side gRPC.
-
-package grpc_prometheus
-
-import (
-	prom "github.com/prometheus/client_golang/prometheus"
-	"google.golang.org/grpc"
-)
-
-var (
-	// DefaultServerMetrics is the default instance of ServerMetrics. It is
-	// intended to be used in conjunction the default Prometheus metrics
-	// registry.
-	DefaultServerMetrics = NewServerMetrics()
-
-	// UnaryServerInterceptor is a gRPC server-side interceptor that provides Prometheus monitoring for Unary RPCs.
-	UnaryServerInterceptor = DefaultServerMetrics.UnaryServerInterceptor()
-
-	// StreamServerInterceptor is a gRPC server-side interceptor that provides Prometheus monitoring for Streaming RPCs.
-	StreamServerInterceptor = DefaultServerMetrics.StreamServerInterceptor()
-)
-
-func init() {
-	prom.MustRegister(DefaultServerMetrics.serverStartedCounter)
-	prom.MustRegister(DefaultServerMetrics.serverHandledCounter)
-	prom.MustRegister(DefaultServerMetrics.serverStreamMsgReceived)
-	prom.MustRegister(DefaultServerMetrics.serverStreamMsgSent)
-}
-
-// Register takes a gRPC server and pre-initializes all counters to 0. This
-// allows for easier monitoring in Prometheus (no missing metrics), and should
-// be called *after* all services have been registered with the server. This
-// function acts on the DefaultServerMetrics variable.
-func Register(server *grpc.Server) {
-	DefaultServerMetrics.InitializeMetrics(server)
-}
-
-// EnableHandlingTimeHistogram turns on recording of handling time
-// of RPCs. Histogram metrics can be very expensive for Prometheus
-// to retain and query. This function acts on the DefaultServerMetrics
-// variable and the default Prometheus metrics registry.
-func EnableHandlingTimeHistogram(opts ...HistogramOption) {
-	DefaultServerMetrics.EnableHandlingTimeHistogram(opts...)
-	prom.Register(DefaultServerMetrics.serverHandledHistogram)
-}

vendor/github.com/grpc-ecosystem/go-grpc-prometheus/server_metrics.go

@@ -1,185 +0,0 @@
-package grpc_prometheus
-
-import (
-	prom "github.com/prometheus/client_golang/prometheus"
-	"golang.org/x/net/context"
-	"google.golang.org/grpc"
-	"google.golang.org/grpc/status"
-)
-
-// ServerMetrics represents a collection of metrics to be registered on a
-// Prometheus metrics registry for a gRPC server.
-type ServerMetrics struct {
-	serverStartedCounter          *prom.CounterVec
-	serverHandledCounter          *prom.CounterVec
-	serverStreamMsgReceived       *prom.CounterVec
-	serverStreamMsgSent           *prom.CounterVec
-	serverHandledHistogramEnabled bool
-	serverHandledHistogramOpts    prom.HistogramOpts
-	serverHandledHistogram        *prom.HistogramVec
-}
-
-// NewServerMetrics returns a ServerMetrics object. Use a new instance of
-// ServerMetrics when not using the default Prometheus metrics registry, for
-// example when wanting to control which metrics are added to a registry as
-// opposed to automatically adding metrics via init functions.
-func NewServerMetrics(counterOpts ...CounterOption) *ServerMetrics {
-	opts := counterOptions(counterOpts)
-	return &ServerMetrics{
-		serverStartedCounter: prom.NewCounterVec(
-			opts.apply(prom.CounterOpts{
-				Name: "grpc_server_started_total",
-				Help: "Total number of RPCs started on the server.",
-			}), []string{"grpc_type", "grpc_service", "grpc_method"}),
-		serverHandledCounter: prom.NewCounterVec(
-			opts.apply(prom.CounterOpts{
-				Name: "grpc_server_handled_total",
-				Help: "Total number of RPCs completed on the server, regardless of success or failure.",
-			}), []string{"grpc_type", "grpc_service", "grpc_method", "grpc_code"}),
-		serverStreamMsgReceived: prom.NewCounterVec(
-			opts.apply(prom.CounterOpts{
-				Name: "grpc_server_msg_received_total",
-				Help: "Total number of RPC stream messages received on the server.",
-			}), []string{"grpc_type", "grpc_service", "grpc_method"}),
-		serverStreamMsgSent: prom.NewCounterVec(
-			opts.apply(prom.CounterOpts{
-				Name: "grpc_server_msg_sent_total",
-				Help: "Total number of gRPC stream messages sent by the server.",
-			}), []string{"grpc_type", "grpc_service", "grpc_method"}),
-		serverHandledHistogramEnabled: false,
-		serverHandledHistogramOpts: prom.HistogramOpts{
-			Name:    "grpc_server_handling_seconds",
-			Help:    "Histogram of response latency (seconds) of gRPC that had been application-level handled by the server.",
-			Buckets: prom.DefBuckets,
-		},
-		serverHandledHistogram: nil,
-	}
-}
-
-// EnableHandlingTimeHistogram enables histograms being registered when
-// registering the ServerMetrics on a Prometheus registry. Histograms can be
-// expensive on Prometheus servers. It takes options to configure histogram
-// options such as the defined buckets.
-func (m *ServerMetrics) EnableHandlingTimeHistogram(opts ...HistogramOption) {
-	for _, o := range opts {
-		o(&m.serverHandledHistogramOpts)
-	}
-	if !m.serverHandledHistogramEnabled {
-		m.serverHandledHistogram = prom.NewHistogramVec(
-			m.serverHandledHistogramOpts,
-			[]string{"grpc_type", "grpc_service", "grpc_method"},
-		)
-	}
-	m.serverHandledHistogramEnabled = true
-}
-
-// Describe sends the super-set of all possible descriptors of metrics
-// collected by this Collector to the provided channel and returns once
-// the last descriptor has been sent.
-func (m *ServerMetrics) Describe(ch chan<- *prom.Desc) {
-	m.serverStartedCounter.Describe(ch)
-	m.serverHandledCounter.Describe(ch)
-	m.serverStreamMsgReceived.Describe(ch)
-	m.serverStreamMsgSent.Describe(ch)
-	if m.serverHandledHistogramEnabled {
-		m.serverHandledHistogram.Describe(ch)
-	}
-}
-
-// Collect is called by the Prometheus registry when collecting
-// metrics. The implementation sends each collected metric via the
-// provided channel and returns once the last metric has been sent.
-func (m *ServerMetrics) Collect(ch chan<- prom.Metric) {
-	m.serverStartedCounter.Collect(ch)
-	m.serverHandledCounter.Collect(ch)
-	m.serverStreamMsgReceived.Collect(ch)
-	m.serverStreamMsgSent.Collect(ch)
-	if m.serverHandledHistogramEnabled {
-		m.serverHandledHistogram.Collect(ch)
-	}
-}
-
-// UnaryServerInterceptor is a gRPC server-side interceptor that provides Prometheus monitoring for Unary RPCs.
-func (m *ServerMetrics) UnaryServerInterceptor() func(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (interface{}, error) {
-	return func(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (interface{}, error) {
-		monitor := newServerReporter(m, Unary, info.FullMethod)
-		monitor.ReceivedMessage()
-		resp, err := handler(ctx, req)
-		st, _ := status.FromError(err)
-		monitor.Handled(st.Code())
-		if err == nil {
-			monitor.SentMessage()
-		}
-		return resp, err
-	}
-}
-
-// StreamServerInterceptor is a gRPC server-side interceptor that provides Prometheus monitoring for Streaming RPCs.
-func (m *ServerMetrics) StreamServerInterceptor() func(srv interface{}, ss grpc.ServerStream, info *grpc.StreamServerInfo, handler grpc.StreamHandler) error {
-	return func(srv interface{}, ss grpc.ServerStream, info *grpc.StreamServerInfo, handler grpc.StreamHandler) error {
-		monitor := newServerReporter(m, streamRPCType(info), info.FullMethod)
-		err := handler(srv, &monitoredServerStream{ss, monitor})
-		st, _ := status.FromError(err)
-		monitor.Handled(st.Code())
-		return err
-	}
-}
-
-// InitializeMetrics initializes all metrics, with their appropriate null
-// value, for all gRPC methods registered on a gRPC server. This is useful, to
-// ensure that all metrics exist when collecting and querying.
-func (m *ServerMetrics) InitializeMetrics(server *grpc.Server) {
-	serviceInfo := server.GetServiceInfo()
-	for serviceName, info := range serviceInfo {
-		for _, mInfo := range info.Methods {
-			preRegisterMethod(m, serviceName, &mInfo)
-		}
-	}
-}
-
-func streamRPCType(info *grpc.StreamServerInfo) grpcType {
-	if info.IsClientStream && !info.IsServerStream {
-		return ClientStream
-	} else if !info.IsClientStream && info.IsServerStream {
-		return ServerStream
-	}
-	return BidiStream
-}
-
-// monitoredStream wraps grpc.ServerStream allowing each Sent/Recv of message to increment counters.
-type monitoredServerStream struct {
-	grpc.ServerStream
-	monitor *serverReporter
-}
-
-func (s *monitoredServerStream) SendMsg(m interface{}) error {
-	err := s.ServerStream.SendMsg(m)
-	if err == nil {
-		s.monitor.SentMessage()
-	}
-	return err
-}
-
-func (s *monitoredServerStream) RecvMsg(m interface{}) error {
-	err := s.ServerStream.RecvMsg(m)
-	if err == nil {
-		s.monitor.ReceivedMessage()
-	}
-	return err
-}
-
-// preRegisterMethod is invoked on Register of a Server, allowing all gRPC services labels to be pre-populated.
-func preRegisterMethod(metrics *ServerMetrics, serviceName string, mInfo *grpc.MethodInfo) {
-	methodName := mInfo.Name
-	methodType := string(typeFromMethodInfo(mInfo))
-	// These are just references (no increments), as just referencing will create the labels but not set values.
-	metrics.serverStartedCounter.GetMetricWithLabelValues(methodType, serviceName, methodName)
-	metrics.serverStreamMsgReceived.GetMetricWithLabelValues(methodType, serviceName, methodName)
-	metrics.serverStreamMsgSent.GetMetricWithLabelValues(methodType, serviceName, methodName)
-	if metrics.serverHandledHistogramEnabled {
-		metrics.serverHandledHistogram.GetMetricWithLabelValues(methodType, serviceName, methodName)
-	}
-	for _, code := range allCodes {
-		metrics.serverHandledCounter.GetMetricWithLabelValues(methodType, serviceName, methodName, code.String())
-	}
-}

vendor/github.com/grpc-ecosystem/go-grpc-prometheus/server_reporter.go

@@ -1,46 +0,0 @@
-// Copyright 2016 Michal Witkowski. All Rights Reserved.
-// See LICENSE for licensing terms.
-
-package grpc_prometheus
-
-import (
-	"time"
-
-	"google.golang.org/grpc/codes"
-)
-
-type serverReporter struct {
-	metrics     *ServerMetrics
-	rpcType     grpcType
-	serviceName string
-	methodName  string
-	startTime   time.Time
-}
-
-func newServerReporter(m *ServerMetrics, rpcType grpcType, fullMethod string) *serverReporter {
-	r := &serverReporter{
-		metrics: m,
-		rpcType: rpcType,
-	}
-	if r.metrics.serverHandledHistogramEnabled {
-		r.startTime = time.Now()
-	}
-	r.serviceName, r.methodName = splitMethodName(fullMethod)
-	r.metrics.serverStartedCounter.WithLabelValues(string(r.rpcType), r.serviceName, r.methodName).Inc()
-	return r
-}
-
-func (r *serverReporter) ReceivedMessage() {
-	r.metrics.serverStreamMsgReceived.WithLabelValues(string(r.rpcType), r.serviceName, r.methodName).Inc()
-}
-
-func (r *serverReporter) SentMessage() {
-	r.metrics.serverStreamMsgSent.WithLabelValues(string(r.rpcType), r.serviceName, r.methodName).Inc()
-}
-
-func (r *serverReporter) Handled(code codes.Code) {
-	r.metrics.serverHandledCounter.WithLabelValues(string(r.rpcType), r.serviceName, r.methodName, code.String()).Inc()
-	if r.metrics.serverHandledHistogramEnabled {
-		r.metrics.serverHandledHistogram.WithLabelValues(string(r.rpcType), r.serviceName, r.methodName).Observe(time.Since(r.startTime).Seconds())
-	}
-}

vendor/github.com/grpc-ecosystem/go-grpc-prometheus/util.go

@@ -1,50 +0,0 @@
-// Copyright 2016 Michal Witkowski. All Rights Reserved.
-// See LICENSE for licensing terms.
-
-package grpc_prometheus
-
-import (
-	"strings"
-
-	"google.golang.org/grpc"
-	"google.golang.org/grpc/codes"
-)
-
-type grpcType string
-
-const (
-	Unary        grpcType = "unary"
-	ClientStream grpcType = "client_stream"
-	ServerStream grpcType = "server_stream"
-	BidiStream   grpcType = "bidi_stream"
-)
-
-var (
-	allCodes = []codes.Code{
-		codes.OK, codes.Canceled, codes.Unknown, codes.InvalidArgument, codes.DeadlineExceeded, codes.NotFound,
-		codes.AlreadyExists, codes.PermissionDenied, codes.Unauthenticated, codes.ResourceExhausted,
-		codes.FailedPrecondition, codes.Aborted, codes.OutOfRange, codes.Unimplemented, codes.Internal,
-		codes.Unavailable, codes.DataLoss,
-	}
-)
-
-func splitMethodName(fullMethodName string) (string, string) {
-	fullMethodName = strings.TrimPrefix(fullMethodName, "/") // remove leading slash
-	if i := strings.Index(fullMethodName, "/"); i >= 0 {
-		return fullMethodName[:i], fullMethodName[i+1:]
-	}
-	return "unknown", "unknown"
-}
-
-func typeFromMethodInfo(mInfo *grpc.MethodInfo) grpcType {
-	if !mInfo.IsClientStream && !mInfo.IsServerStream {
-		return Unary
-	}
-	if mInfo.IsClientStream && !mInfo.IsServerStream {
-		return ClientStream
-	}
-	if !mInfo.IsClientStream && mInfo.IsServerStream {
-		return ServerStream
-	}
-	return BidiStream
-}

vendor/golang.org/x/net/context/context.go

@@ -1,56 +0,0 @@
-// Copyright 2014 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 context defines the Context type, which carries deadlines,
-// cancelation signals, and other request-scoped values across API boundaries
-// and between processes.
-// As of Go 1.7 this package is available in the standard library under the
-// name context.  https://golang.org/pkg/context.
-//
-// Incoming requests to a server should create a Context, and outgoing calls to
-// servers should accept a Context. The chain of function calls between must
-// propagate the Context, optionally replacing it with a modified copy created
-// using WithDeadline, WithTimeout, WithCancel, or WithValue.
-//
-// Programs that use Contexts should follow these rules to keep interfaces
-// consistent across packages and enable static analysis tools to check context
-// propagation:
-//
-// Do not store Contexts inside a struct type; instead, pass a Context
-// explicitly to each function that needs it. The Context should be the first
-// parameter, typically named ctx:
-//
-//	func DoSomething(ctx context.Context, arg Arg) error {
-//		// ... use ctx ...
-//	}
-//
-// Do not pass a nil Context, even if a function permits it. Pass context.TODO
-// if you are unsure about which Context to use.
-//
-// Use context Values only for request-scoped data that transits processes and
-// APIs, not for passing optional parameters to functions.
-//
-// The same Context may be passed to functions running in different goroutines;
-// Contexts are safe for simultaneous use by multiple goroutines.
-//
-// See http://blog.golang.org/context for example code for a server that uses
-// Contexts.
-package context // import "golang.org/x/net/context"
-
-// Background returns a non-nil, empty Context. It is never canceled, has no
-// values, and has no deadline. It is typically used by the main function,
-// initialization, and tests, and as the top-level Context for incoming
-// requests.
-func Background() Context {
-	return background
-}
-
-// TODO returns a non-nil, empty Context. Code should use context.TODO when
-// it's unclear which Context to use or it is not yet available (because the
-// surrounding function has not yet been extended to accept a Context
-// parameter).  TODO is recognized by static analysis tools that determine
-// whether Contexts are propagated correctly in a program.
-func TODO() Context {
-	return todo
-}

vendor/golang.org/x/net/context/go17.go

@@ -1,72 +0,0 @@
-// 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.
-
-//go:build go1.7
-
-package context
-
-import (
-	"context" // standard library's context, as of Go 1.7
-	"time"
-)
-
-var (
-	todo       = context.TODO()
-	background = context.Background()
-)
-
-// Canceled is the error returned by Context.Err when the context is canceled.
-var Canceled = context.Canceled
-
-// DeadlineExceeded is the error returned by Context.Err when the context's
-// deadline passes.
-var DeadlineExceeded = context.DeadlineExceeded
-
-// WithCancel returns a copy of parent with a new Done channel. The returned
-// context's Done channel is closed when the returned cancel function is called
-// or when the parent context's Done channel is closed, whichever happens first.
-//
-// Canceling this context releases resources associated with it, so code should
-// call cancel as soon as the operations running in this Context complete.
-func WithCancel(parent Context) (ctx Context, cancel CancelFunc) {
-	ctx, f := context.WithCancel(parent)
-	return ctx, f
-}
-
-// WithDeadline returns a copy of the parent context with the deadline adjusted
-// to be no later than d. If the parent's deadline is already earlier than d,
-// WithDeadline(parent, d) is semantically equivalent to parent. The returned
-// context's Done channel is closed when the deadline expires, when the returned
-// cancel function is called, or when the parent context's Done channel is
-// closed, whichever happens first.
-//
-// Canceling this context releases resources associated with it, so code should
-// call cancel as soon as the operations running in this Context complete.
-func WithDeadline(parent Context, deadline time.Time) (Context, CancelFunc) {
-	ctx, f := context.WithDeadline(parent, deadline)
-	return ctx, f
-}
-
-// WithTimeout returns WithDeadline(parent, time.Now().Add(timeout)).
-//
-// Canceling this context releases resources associated with it, so code should
-// call cancel as soon as the operations running in this Context complete:
-//
-//	func slowOperationWithTimeout(ctx context.Context) (Result, error) {
-//		ctx, cancel := context.WithTimeout(ctx, 100*time.Millisecond)
-//		defer cancel()  // releases resources if slowOperation completes before timeout elapses
-//		return slowOperation(ctx)
-//	}
-func WithTimeout(parent Context, timeout time.Duration) (Context, CancelFunc) {
-	return WithDeadline(parent, time.Now().Add(timeout))
-}
-
-// WithValue returns a copy of parent in which the value associated with key is
-// val.
-//
-// Use context Values only for request-scoped data that transits processes and
-// APIs, not for passing optional parameters to functions.
-func WithValue(parent Context, key interface{}, val interface{}) Context {
-	return context.WithValue(parent, key, val)
-}

vendor/golang.org/x/net/context/go19.go

@@ -1,20 +0,0 @@
-// Copyright 2017 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.
-
-//go:build go1.9
-
-package context
-
-import "context" // standard library's context, as of Go 1.7
-
-// A Context carries a deadline, a cancelation signal, and other values across
-// API boundaries.
-//
-// Context's methods may be called by multiple goroutines simultaneously.
-type Context = context.Context
-
-// A CancelFunc tells an operation to abandon its work.
-// A CancelFunc does not wait for the work to stop.
-// After the first call, subsequent calls to a CancelFunc do nothing.
-type CancelFunc = context.CancelFunc

vendor/golang.org/x/net/context/pre_go17.go

@@ -1,300 +0,0 @@
-// Copyright 2014 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.
-
-//go:build !go1.7
-
-package context
-
-import (
-	"errors"
-	"fmt"
-	"sync"
-	"time"
-)
-
-// An emptyCtx is never canceled, has no values, and has no deadline. It is not
-// struct{}, since vars of this type must have distinct addresses.
-type emptyCtx int
-
-func (*emptyCtx) Deadline() (deadline time.Time, ok bool) {
-	return
-}
-
-func (*emptyCtx) Done() <-chan struct{} {
-	return nil
-}
-
-func (*emptyCtx) Err() error {
-	return nil
-}
-
-func (*emptyCtx) Value(key interface{}) interface{} {
-	return nil
-}
-
-func (e *emptyCtx) String() string {
-	switch e {
-	case background:
-		return "context.Background"
-	case todo:
-		return "context.TODO"
-	}
-	return "unknown empty Context"
-}
-
-var (
-	background = new(emptyCtx)
-	todo       = new(emptyCtx)
-)
-
-// Canceled is the error returned by Context.Err when the context is canceled.
-var Canceled = errors.New("context canceled")
-
-// DeadlineExceeded is the error returned by Context.Err when the context's
-// deadline passes.
-var DeadlineExceeded = errors.New("context deadline exceeded")
-
-// WithCancel returns a copy of parent with a new Done channel. The returned
-// context's Done channel is closed when the returned cancel function is called
-// or when the parent context's Done channel is closed, whichever happens first.
-//
-// Canceling this context releases resources associated with it, so code should
-// call cancel as soon as the operations running in this Context complete.
-func WithCancel(parent Context) (ctx Context, cancel CancelFunc) {
-	c := newCancelCtx(parent)
-	propagateCancel(parent, c)
-	return c, func() { c.cancel(true, Canceled) }
-}
-
-// newCancelCtx returns an initialized cancelCtx.
-func newCancelCtx(parent Context) *cancelCtx {
-	return &cancelCtx{
-		Context: parent,
-		done:    make(chan struct{}),
-	}
-}
-
-// propagateCancel arranges for child to be canceled when parent is.
-func propagateCancel(parent Context, child canceler) {
-	if parent.Done() == nil {
-		return // parent is never canceled
-	}
-	if p, ok := parentCancelCtx(parent); ok {
-		p.mu.Lock()
-		if p.err != nil {
-			// parent has already been canceled
-			child.cancel(false, p.err)
-		} else {
-			if p.children == nil {
-				p.children = make(map[canceler]bool)
-			}
-			p.children[child] = true
-		}
-		p.mu.Unlock()
-	} else {
-		go func() {
-			select {
-			case <-parent.Done():
-				child.cancel(false, parent.Err())
-			case <-child.Done():
-			}
-		}()
-	}
-}
-
-// parentCancelCtx follows a chain of parent references until it finds a
-// *cancelCtx. This function understands how each of the concrete types in this
-// package represents its parent.
-func parentCancelCtx(parent Context) (*cancelCtx, bool) {
-	for {
-		switch c := parent.(type) {
-		case *cancelCtx:
-			return c, true
-		case *timerCtx:
-			return c.cancelCtx, true
-		case *valueCtx:
-			parent = c.Context
-		default:
-			return nil, false
-		}
-	}
-}
-
-// removeChild removes a context from its parent.
-func removeChild(parent Context, child canceler) {
-	p, ok := parentCancelCtx(parent)
-	if !ok {
-		return
-	}
-	p.mu.Lock()
-	if p.children != nil {
-		delete(p.children, child)
-	}
-	p.mu.Unlock()
-}
-
-// A canceler is a context type that can be canceled directly. The
-// implementations are *cancelCtx and *timerCtx.
-type canceler interface {
-	cancel(removeFromParent bool, err error)
-	Done() <-chan struct{}
-}
-
-// A cancelCtx can be canceled. When canceled, it also cancels any children
-// that implement canceler.
-type cancelCtx struct {
-	Context
-
-	done chan struct{} // closed by the first cancel call.
-
-	mu       sync.Mutex
-	children map[canceler]bool // set to nil by the first cancel call
-	err      error             // set to non-nil by the first cancel call
-}
-
-func (c *cancelCtx) Done() <-chan struct{} {
-	return c.done
-}
-
-func (c *cancelCtx) Err() error {
-	c.mu.Lock()
-	defer c.mu.Unlock()
-	return c.err
-}
-
-func (c *cancelCtx) String() string {
-	return fmt.Sprintf("%v.WithCancel", c.Context)
-}
-
-// cancel closes c.done, cancels each of c's children, and, if
-// removeFromParent is true, removes c from its parent's children.
-func (c *cancelCtx) cancel(removeFromParent bool, err error) {
-	if err == nil {
-		panic("context: internal error: missing cancel error")
-	}
-	c.mu.Lock()
-	if c.err != nil {
-		c.mu.Unlock()
-		return // already canceled
-	}
-	c.err = err
-	close(c.done)
-	for child := range c.children {
-		// NOTE: acquiring the child's lock while holding parent's lock.
-		child.cancel(false, err)
-	}
-	c.children = nil
-	c.mu.Unlock()
-
-	if removeFromParent {
-		removeChild(c.Context, c)
-	}
-}
-
-// WithDeadline returns a copy of the parent context with the deadline adjusted
-// to be no later than d. If the parent's deadline is already earlier than d,
-// WithDeadline(parent, d) is semantically equivalent to parent. The returned
-// context's Done channel is closed when the deadline expires, when the returned
-// cancel function is called, or when the parent context's Done channel is
-// closed, whichever happens first.
-//
-// Canceling this context releases resources associated with it, so code should
-// call cancel as soon as the operations running in this Context complete.
-func WithDeadline(parent Context, deadline time.Time) (Context, CancelFunc) {
-	if cur, ok := parent.Deadline(); ok && cur.Before(deadline) {
-		// The current deadline is already sooner than the new one.
-		return WithCancel(parent)
-	}
-	c := &timerCtx{
-		cancelCtx: newCancelCtx(parent),
-		deadline:  deadline,
-	}
-	propagateCancel(parent, c)
-	d := deadline.Sub(time.Now())
-	if d <= 0 {
-		c.cancel(true, DeadlineExceeded) // deadline has already passed
-		return c, func() { c.cancel(true, Canceled) }
-	}
-	c.mu.Lock()
-	defer c.mu.Unlock()
-	if c.err == nil {
-		c.timer = time.AfterFunc(d, func() {
-			c.cancel(true, DeadlineExceeded)
-		})
-	}
-	return c, func() { c.cancel(true, Canceled) }
-}
-
-// A timerCtx carries a timer and a deadline. It embeds a cancelCtx to
-// implement Done and Err. It implements cancel by stopping its timer then
-// delegating to cancelCtx.cancel.
-type timerCtx struct {
-	*cancelCtx
-	timer *time.Timer // Under cancelCtx.mu.
-
-	deadline time.Time
-}
-
-func (c *timerCtx) Deadline() (deadline time.Time, ok bool) {
-	return c.deadline, true
-}
-
-func (c *timerCtx) String() string {
-	return fmt.Sprintf("%v.WithDeadline(%s [%s])", c.cancelCtx.Context, c.deadline, c.deadline.Sub(time.Now()))
-}
-
-func (c *timerCtx) cancel(removeFromParent bool, err error) {
-	c.cancelCtx.cancel(false, err)
-	if removeFromParent {
-		// Remove this timerCtx from its parent cancelCtx's children.
-		removeChild(c.cancelCtx.Context, c)
-	}
-	c.mu.Lock()
-	if c.timer != nil {
-		c.timer.Stop()
-		c.timer = nil
-	}
-	c.mu.Unlock()
-}
-
-// WithTimeout returns WithDeadline(parent, time.Now().Add(timeout)).
-//
-// Canceling this context releases resources associated with it, so code should
-// call cancel as soon as the operations running in this Context complete:
-//
-//	func slowOperationWithTimeout(ctx context.Context) (Result, error) {
-//		ctx, cancel := context.WithTimeout(ctx, 100*time.Millisecond)
-//		defer cancel()  // releases resources if slowOperation completes before timeout elapses
-//		return slowOperation(ctx)
-//	}
-func WithTimeout(parent Context, timeout time.Duration) (Context, CancelFunc) {
-	return WithDeadline(parent, time.Now().Add(timeout))
-}
-
-// WithValue returns a copy of parent in which the value associated with key is
-// val.
-//
-// Use context Values only for request-scoped data that transits processes and
-// APIs, not for passing optional parameters to functions.
-func WithValue(parent Context, key interface{}, val interface{}) Context {
-	return &valueCtx{parent, key, val}
-}
-
-// A valueCtx carries a key-value pair. It implements Value for that key and
-// delegates all other calls to the embedded Context.
-type valueCtx struct {
-	Context
-	key, val interface{}
-}
-
-func (c *valueCtx) String() string {
-	return fmt.Sprintf("%v.WithValue(%#v, %#v)", c.Context, c.key, c.val)
-}
-
-func (c *valueCtx) Value(key interface{}) interface{} {
-	if c.key == key {
-		return c.val
-	}
-	return c.Context.Value(key)
-}

vendor/golang.org/x/net/context/pre_go19.go

@@ -1,109 +0,0 @@
-// Copyright 2014 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.
-
-//go:build !go1.9
-
-package context
-
-import "time"
-
-// A Context carries a deadline, a cancelation signal, and other values across
-// API boundaries.
-//
-// Context's methods may be called by multiple goroutines simultaneously.
-type Context interface {
-	// Deadline returns the time when work done on behalf of this context
-	// should be canceled. Deadline returns ok==false when no deadline is
-	// set. Successive calls to Deadline return the same results.
-	Deadline() (deadline time.Time, ok bool)
-
-	// Done returns a channel that's closed when work done on behalf of this
-	// context should be canceled. Done may return nil if this context can
-	// never be canceled. Successive calls to Done return the same value.
-	//
-	// WithCancel arranges for Done to be closed when cancel is called;
-	// WithDeadline arranges for Done to be closed when the deadline
-	// expires; WithTimeout arranges for Done to be closed when the timeout
-	// elapses.
-	//
-	// Done is provided for use in select statements:
-	//
-	//  // Stream generates values with DoSomething and sends them to out
-	//  // until DoSomething returns an error or ctx.Done is closed.
-	//  func Stream(ctx context.Context, out chan<- Value) error {
-	//  	for {
-	//  		v, err := DoSomething(ctx)
-	//  		if err != nil {
-	//  			return err
-	//  		}
-	//  		select {
-	//  		case <-ctx.Done():
-	//  			return ctx.Err()
-	//  		case out <- v:
-	//  		}
-	//  	}
-	//  }
-	//
-	// See http://blog.golang.org/pipelines for more examples of how to use
-	// a Done channel for cancelation.
-	Done() <-chan struct{}
-
-	// Err returns a non-nil error value after Done is closed. Err returns
-	// Canceled if the context was canceled or DeadlineExceeded if the
-	// context's deadline passed. No other values for Err are defined.
-	// After Done is closed, successive calls to Err return the same value.
-	Err() error
-
-	// Value returns the value associated with this context for key, or nil
-	// if no value is associated with key. Successive calls to Value with
-	// the same key returns the same result.
-	//
-	// Use context values only for request-scoped data that transits
-	// processes and API boundaries, not for passing optional parameters to
-	// functions.
-	//
-	// A key identifies a specific value in a Context. Functions that wish
-	// to store values in Context typically allocate a key in a global
-	// variable then use that key as the argument to context.WithValue and
-	// Context.Value. A key can be any type that supports equality;
-	// packages should define keys as an unexported type to avoid
-	// collisions.
-	//
-	// Packages that define a Context key should provide type-safe accessors
-	// for the values stores using that key:
-	//
-	// 	// Package user defines a User type that's stored in Contexts.
-	// 	package user
-	//
-	// 	import "golang.org/x/net/context"
-	//
-	// 	// User is the type of value stored in the Contexts.
-	// 	type User struct {...}
-	//
-	// 	// key is an unexported type for keys defined in this package.
-	// 	// This prevents collisions with keys defined in other packages.
-	// 	type key int
-	//
-	// 	// userKey is the key for user.User values in Contexts. It is
-	// 	// unexported; clients use user.NewContext and user.FromContext
-	// 	// instead of using this key directly.
-	// 	var userKey key = 0
-	//
-	// 	// NewContext returns a new Context that carries value u.
-	// 	func NewContext(ctx context.Context, u *User) context.Context {
-	// 		return context.WithValue(ctx, userKey, u)
-	// 	}
-	//
-	// 	// FromContext returns the User value stored in ctx, if any.
-	// 	func FromContext(ctx context.Context) (*User, bool) {
-	// 		u, ok := ctx.Value(userKey).(*User)
-	// 		return u, ok
-	// 	}
-	Value(key interface{}) interface{}
-}
-
-// A CancelFunc tells an operation to abandon its work.
-// A CancelFunc does not wait for the work to stop.
-// After the first call, subsequent calls to a CancelFunc do nothing.
-type CancelFunc func()

vendor/modules.txt

@@ -246,12 +246,12 @@ github.com/google/uuid
 # github.com/gorilla/websocket v1.5.0
 ## explicit; go 1.12
 github.com/gorilla/websocket
-# github.com/grpc-ecosystem/go-grpc-middleware v1.4.0
+# github.com/grpc-ecosystem/go-grpc-middleware/providers/prometheus v1.0.0
+## explicit; go 1.19
+github.com/grpc-ecosystem/go-grpc-middleware/providers/prometheus
+# github.com/grpc-ecosystem/go-grpc-middleware/v2 v2.0.0-rc.3
 ## explicit; go 1.14
-github.com/grpc-ecosystem/go-grpc-middleware
+github.com/grpc-ecosystem/go-grpc-middleware/v2/interceptors
-# github.com/grpc-ecosystem/go-grpc-prometheus v1.2.0
-## explicit
-github.com/grpc-ecosystem/go-grpc-prometheus
 # github.com/grpc-ecosystem/grpc-gateway/v2 v2.19.0
 ## explicit; go 1.19
 github.com/grpc-ecosystem/grpc-gateway/v2/internal/httprule
@@ -488,7 +488,6 @@ golang.org/x/exp/slices
 golang.org/x/mod/semver
 # golang.org/x/net v0.20.0
 ## explicit; go 1.18
-golang.org/x/net/context
 golang.org/x/net/html
 golang.org/x/net/html/atom
 golang.org/x/net/http/httpguts