Merge pull request #71020 from saad-ali/updateCSI10

Bump CSI Spec to 1.0.0 and gRPC to 1.13.0

Godeps/Godeps.json

@@ -811,9 +811,9 @@
 			"Rev": "20e2ce2cf8852dc78bd42b76698dcd8dcd77b7b1"
 		},
 		{
-			"ImportPath": "github.com/container-storage-interface/spec/lib/go/csi/v0",
+			"ImportPath": "github.com/container-storage-interface/spec/lib/go/csi",
-			"Comment": "v0.3.0",
+			"Comment": "v1.0.0",
-			"Rev": "2178fdeea87f1150a17a63252eee28d4d8141f72"
+			"Rev": "ed0bb0e1557548aa028307f48728767cfe8f6345"
 		},
 		{
 			"ImportPath": "github.com/containerd/console",
@@ -1807,6 +1807,11 @@
 			"Comment": "v1.1.0",
 			"Rev": "b4deda0973fb4c70b50d226b1af49f3da59f5265"
 		},
+		{
+			"ImportPath": "github.com/golang/protobuf/protoc-gen-go/descriptor",
+			"Comment": "v1.1.0",
+			"Rev": "b4deda0973fb4c70b50d226b1af49f3da59f5265"
+		},
 		{
 			"ImportPath": "github.com/golang/protobuf/ptypes",
 			"Comment": "v1.1.0",
@@ -3747,98 +3752,143 @@
 		},
 		{
 			"ImportPath": "google.golang.org/grpc",
-			"Comment": "v1.7.5",
+			"Comment": "v1.13.0",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/balancer",
-			"Comment": "v1.7.5",
+			"Comment": "v1.13.0",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
+		},
+		{
+			"ImportPath": "google.golang.org/grpc/balancer/base",
+			"Comment": "v1.13.0",
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
+		},
+		{
+			"ImportPath": "google.golang.org/grpc/balancer/roundrobin",
+			"Comment": "v1.13.0",
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/codes",
-			"Comment": "v1.7.5",
+			"Comment": "v1.13.0",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/connectivity",
-			"Comment": "v1.7.5",
+			"Comment": "v1.13.0",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/credentials",
-			"Comment": "v1.7.5",
+			"Comment": "v1.13.0",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
+		},
+		{
+			"ImportPath": "google.golang.org/grpc/encoding",
+			"Comment": "v1.13.0",
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
+		},
+		{
+			"ImportPath": "google.golang.org/grpc/encoding/proto",
+			"Comment": "v1.13.0",
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/grpclb/grpc_lb_v1/messages",
-			"Comment": "v1.7.5",
+			"Comment": "v1.13.0",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/grpclog",
-			"Comment": "v1.7.5",
+			"Comment": "v1.13.0",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/health",
-			"Comment": "v1.7.5",
+			"Comment": "v1.13.0",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/health/grpc_health_v1",
-			"Comment": "v1.7.5",
+			"Comment": "v1.13.0",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/internal",
-			"Comment": "v1.7.5",
+			"Comment": "v1.13.0",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
+		},
+		{
+			"ImportPath": "google.golang.org/grpc/internal/backoff",
+			"Comment": "v1.13.0",
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
+		},
+		{
+			"ImportPath": "google.golang.org/grpc/internal/channelz",
+			"Comment": "v1.13.0",
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
+		},
+		{
+			"ImportPath": "google.golang.org/grpc/internal/grpcrand",
+			"Comment": "v1.13.0",
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/keepalive",
-			"Comment": "v1.7.5",
+			"Comment": "v1.13.0",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/metadata",
-			"Comment": "v1.7.5",
+			"Comment": "v1.13.0",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/naming",
-			"Comment": "v1.7.5",
+			"Comment": "v1.13.0",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/peer",
-			"Comment": "v1.7.5",
+			"Comment": "v1.13.0",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/resolver",
-			"Comment": "v1.7.5",
+			"Comment": "v1.13.0",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
+		},
+		{
+			"ImportPath": "google.golang.org/grpc/resolver/dns",
+			"Comment": "v1.13.0",
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
+		},
+		{
+			"ImportPath": "google.golang.org/grpc/resolver/passthrough",
+			"Comment": "v1.13.0",
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/stats",
-			"Comment": "v1.7.5",
+			"Comment": "v1.13.0",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/status",
-			"Comment": "v1.7.5",
+			"Comment": "v1.13.0",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/tap",
-			"Comment": "v1.7.5",
+			"Comment": "v1.13.0",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/transport",
-			"Comment": "v1.7.5",
+			"Comment": "v1.13.0",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "gopkg.in/gcfg.v1",

pkg/volume/csi/BUILD

@@ -30,7 +30,7 @@ go_library(
         "//staging/src/k8s.io/csi-api/pkg/client/informers/externalversions:go_default_library",
         "//staging/src/k8s.io/csi-api/pkg/client/informers/externalversions/csi/v1alpha1:go_default_library",
         "//staging/src/k8s.io/csi-api/pkg/client/listers/csi/v1alpha1:go_default_library",
-        "//vendor/github.com/container-storage-interface/spec/lib/go/csi/v0:go_default_library",
+        "//vendor/github.com/container-storage-interface/spec/lib/go/csi:go_default_library",
         "//vendor/google.golang.org/grpc:go_default_library",
         "//vendor/k8s.io/klog:go_default_library",
     ],
@@ -69,7 +69,7 @@ go_test(
         "//staging/src/k8s.io/client-go/util/testing:go_default_library",
         "//staging/src/k8s.io/csi-api/pkg/apis/csi/v1alpha1:go_default_library",
         "//staging/src/k8s.io/csi-api/pkg/client/clientset/versioned/fake:go_default_library",
-        "//vendor/github.com/container-storage-interface/spec/lib/go/csi/v0:go_default_library",
+        "//vendor/github.com/container-storage-interface/spec/lib/go/csi:go_default_library",
         "//vendor/k8s.io/klog:go_default_library",
     ],
 )

pkg/volume/csi/csi_attacher.go

@@ -29,7 +29,7 @@ import (
 
 	"k8s.io/klog"
 
-	csipb "github.com/container-storage-interface/spec/lib/go/csi/v0"
+	csipb "github.com/container-storage-interface/spec/lib/go/csi"
 	"k8s.io/api/core/v1"
 	storage "k8s.io/api/storage/v1beta1"
 	apierrs "k8s.io/apimachinery/pkg/api/errors"

pkg/volume/csi/csi_client.go

@@ -24,7 +24,7 @@ import (
 	"net"
 	"time"
 
-	csipb "github.com/container-storage-interface/spec/lib/go/csi/v0"
+	csipb "github.com/container-storage-interface/spec/lib/go/csi"
 	"google.golang.org/grpc"
 	api "k8s.io/api/core/v1"
 	utilfeature "k8s.io/apiserver/pkg/util/feature"
@@ -46,8 +46,8 @@ type csiClient interface {
 		targetPath string,
 		accessMode api.PersistentVolumeAccessMode,
 		volumeInfo map[string]string,
-		volumeAttribs map[string]string,
+		volumeContext map[string]string,
-		nodePublishSecrets map[string]string,
+		secrets map[string]string,
 		fsType string,
 		mountOptions []string,
 	) error
@@ -62,8 +62,8 @@ type csiClient interface {
 		stagingTargetPath string,
 		fsType string,
 		accessMode api.PersistentVolumeAccessMode,
-		nodeStageSecrets map[string]string,
+		secrets map[string]string,
-		volumeAttribs map[string]string,
+		volumeContext map[string]string,
 	) error
 	NodeUnstageVolume(ctx context.Context, volID, stagingTargetPath string) error
 	NodeGetCapabilities(ctx context.Context) ([]*csipb.NodeServiceCapability, error)
@@ -136,8 +136,8 @@ func (c *csiDriverClient) NodePublishVolume(
 	targetPath string,
 	accessMode api.PersistentVolumeAccessMode,
 	volumeInfo map[string]string,
-	volumeAttribs map[string]string,
+	volumeContext map[string]string,
-	nodePublishSecrets map[string]string,
+	secrets map[string]string,
 	fsType string,
 	mountOptions []string,
 ) error {
@@ -159,9 +159,9 @@ func (c *csiDriverClient) NodePublishVolume(
 		VolumeId:       volID,
 		TargetPath:     targetPath,
 		Readonly:       readOnly,
-		PublishInfo:        volumeInfo,
+		PublishContext: volumeInfo,
-		VolumeAttributes:   volumeAttribs,
+		VolumeContext:  volumeContext,
-		NodePublishSecrets: nodePublishSecrets,
+		Secrets:        secrets,
 		VolumeCapability: &csipb.VolumeCapability{
 			AccessMode: &csipb.VolumeCapability_AccessMode{
 				Mode: asCSIAccessMode(accessMode),
@@ -215,12 +215,12 @@ func (c *csiDriverClient) NodeUnpublishVolume(ctx context.Context, volID string,
 
 func (c *csiDriverClient) NodeStageVolume(ctx context.Context,
 	volID string,
-	publishInfo map[string]string,
+	publishContext map[string]string,
 	stagingTargetPath string,
 	fsType string,
 	accessMode api.PersistentVolumeAccessMode,
-	nodeStageSecrets map[string]string,
+	secrets map[string]string,
-	volumeAttribs map[string]string,
+	volumeContext map[string]string,
 ) error {
 	klog.V(4).Info(log("calling NodeStageVolume rpc [volid=%s,staging_target_path=%s]", volID, stagingTargetPath))
 	if volID == "" {
@@ -238,15 +238,15 @@ func (c *csiDriverClient) NodeStageVolume(ctx context.Context,
 
 	req := &csipb.NodeStageVolumeRequest{
 		VolumeId:          volID,
-		PublishInfo:       publishInfo,
+		PublishContext:    publishContext,
 		StagingTargetPath: stagingTargetPath,
 		VolumeCapability: &csipb.VolumeCapability{
 			AccessMode: &csipb.VolumeCapability_AccessMode{
 				Mode: asCSIAccessMode(accessMode),
 			},
 		},
-		NodeStageSecrets: nodeStageSecrets,
+		Secrets:       secrets,
-		VolumeAttributes: volumeAttribs,
+		VolumeContext: volumeContext,
 	}
 
 	if fsType == fsTypeBlockName {

pkg/volume/csi/csi_client_test.go

@@ -23,7 +23,7 @@ import (
 	"reflect"
 	"testing"
 
-	csipb "github.com/container-storage-interface/spec/lib/go/csi/v0"
+	csipb "github.com/container-storage-interface/spec/lib/go/csi"
 	api "k8s.io/api/core/v1"
 	"k8s.io/kubernetes/pkg/volume/csi/fake"
 )
@@ -57,8 +57,8 @@ func (c *fakeCsiDriverClient) NodePublishVolume(
 	targetPath string,
 	accessMode api.PersistentVolumeAccessMode,
 	volumeInfo map[string]string,
-	volumeAttribs map[string]string,
+	volumeContext map[string]string,
-	nodePublishSecrets map[string]string,
+	secrets map[string]string,
 	fsType string,
 	mountOptions []string,
 ) error {
@@ -67,9 +67,9 @@ func (c *fakeCsiDriverClient) NodePublishVolume(
 		VolumeId:       volID,
 		TargetPath:     targetPath,
 		Readonly:       readOnly,
-		PublishInfo:        volumeInfo,
+		PublishContext: volumeInfo,
-		VolumeAttributes:   volumeAttribs,
+		VolumeContext:  volumeContext,
-		NodePublishSecrets: nodePublishSecrets,
+		Secrets:        secrets,
 		VolumeCapability: &csipb.VolumeCapability{
 			AccessMode: &csipb.VolumeCapability_AccessMode{
 				Mode: asCSIAccessMode(accessMode),
@@ -100,17 +100,17 @@ func (c *fakeCsiDriverClient) NodeUnpublishVolume(ctx context.Context, volID str
 
 func (c *fakeCsiDriverClient) NodeStageVolume(ctx context.Context,
 	volID string,
-	publishInfo map[string]string,
+	publishContext map[string]string,
 	stagingTargetPath string,
 	fsType string,
 	accessMode api.PersistentVolumeAccessMode,
-	nodeStageSecrets map[string]string,
+	secrets map[string]string,
-	volumeAttribs map[string]string,
+	volumeContext map[string]string,
 ) error {
 	c.t.Log("calling fake.NodeStageVolume...")
 	req := &csipb.NodeStageVolumeRequest{
 		VolumeId:          volID,
-		PublishInfo:       publishInfo,
+		PublishContext:    publishContext,
 		StagingTargetPath: stagingTargetPath,
 		VolumeCapability: &csipb.VolumeCapability{
 			AccessMode: &csipb.VolumeCapability_AccessMode{
@@ -122,8 +122,8 @@ func (c *fakeCsiDriverClient) NodeStageVolume(ctx context.Context,
 				},
 			},
 		},
-		NodeStageSecrets: nodeStageSecrets,
+		Secrets:       secrets,
-		VolumeAttributes: volumeAttribs,
+		VolumeContext: volumeContext,
 	}
 
 	_, err := c.nodeClient.NodeStageVolume(ctx, req)
@@ -321,7 +321,7 @@ func TestClientNodeStageVolume(t *testing.T) {
 		volID             string
 		stagingTargetPath string
 		fsType            string
-		secret            map[string]string
+		secrets           map[string]string
 		mustFail          bool
 		err               error
 	}{
@@ -351,7 +351,7 @@ func TestClientNodeStageVolume(t *testing.T) {
 			tc.stagingTargetPath,
 			tc.fsType,
 			api.ReadWriteOnce,
-			tc.secret,
+			tc.secrets,
 			map[string]string{"attr0": "val0"},
 		)
 		checkErr(t, tc.mustFail, err)

pkg/volume/csi/csi_mounter_test.go

@@ -100,45 +100,44 @@ func MounterSetUpTests(t *testing.T, podInfoEnabled bool) {
 	tests := []struct {
 		name                  string
 		driver                string
-		attributes map[string]string
+		volumeContext         map[string]string
-
+		expectedVolumeContext map[string]string
-		expectedAttributes map[string]string
 	}{
 		{
 			name:                  "no pod info",
 			driver:                "no-info",
-			attributes:         nil,
+			volumeContext:         nil,
-			expectedAttributes: nil,
+			expectedVolumeContext: nil,
 		},
 		{
 			name:                  "no CSIDriver -> no pod info",
 			driver:                "unknown-driver",
-			attributes:         nil,
+			volumeContext:         nil,
-			expectedAttributes: nil,
+			expectedVolumeContext: nil,
 		},
 		{
 			name:                  "CSIDriver with PodInfoRequiredOnMount=nil -> no pod info",
 			driver:                "nil",
-			attributes:         nil,
+			volumeContext:         nil,
-			expectedAttributes: nil,
+			expectedVolumeContext: nil,
 		},
 		{
-			name:               "no pod info -> keep existing attributes",
+			name:                  "no pod info -> keep existing volumeContext",
 			driver:                "no-info",
-			attributes:         map[string]string{"foo": "bar"},
+			volumeContext:         map[string]string{"foo": "bar"},
-			expectedAttributes: map[string]string{"foo": "bar"},
+			expectedVolumeContext: map[string]string{"foo": "bar"},
 		},
 		{
 			name:                  "add pod info",
 			driver:                "info",
-			attributes:         nil,
+			volumeContext:         nil,
-			expectedAttributes: map[string]string{"csi.storage.k8s.io/pod.uid": "test-pod", "csi.storage.k8s.io/serviceAccount.name": "test-service-account", "csi.storage.k8s.io/pod.name": "test-pod", "csi.storage.k8s.io/pod.namespace": "test-ns"},
+			expectedVolumeContext: map[string]string{"csi.storage.k8s.io/pod.uid": "test-pod", "csi.storage.k8s.io/serviceAccount.name": "test-service-account", "csi.storage.k8s.io/pod.name": "test-pod", "csi.storage.k8s.io/pod.namespace": "test-ns"},
 		},
 		{
-			name:               "add pod info -> keep existing attributes",
+			name:                  "add pod info -> keep existing volumeContext",
 			driver:                "info",
-			attributes:         map[string]string{"foo": "bar"},
+			volumeContext:         map[string]string{"foo": "bar"},
-			expectedAttributes: map[string]string{"foo": "bar", "csi.storage.k8s.io/pod.uid": "test-pod", "csi.storage.k8s.io/serviceAccount.name": "test-service-account", "csi.storage.k8s.io/pod.name": "test-pod", "csi.storage.k8s.io/pod.namespace": "test-ns"},
+			expectedVolumeContext: map[string]string{"foo": "bar", "csi.storage.k8s.io/pod.uid": "test-pod", "csi.storage.k8s.io/serviceAccount.name": "test-service-account", "csi.storage.k8s.io/pod.name": "test-pod", "csi.storage.k8s.io/pod.namespace": "test-ns"},
 		},
 	}
 
@@ -163,7 +162,7 @@ func MounterSetUpTests(t *testing.T, podInfoEnabled bool) {
 			}
 
 			pv := makeTestPV("test-pv", 10, test.driver, testVol)
-			pv.Spec.CSI.VolumeAttributes = test.attributes
+			pv.Spec.CSI.VolumeAttributes = test.volumeContext
 			pv.Spec.MountOptions = []string{"foo=bar", "baz=qux"}
 			pvName := pv.GetName()
 
@@ -245,13 +244,13 @@ func MounterSetUpTests(t *testing.T, podInfoEnabled bool) {
 				t.Errorf("csi server expected mount options %v, got %v", pv.Spec.MountOptions, vol.MountFlags)
 			}
 			if podInfoEnabled {
-				if !reflect.DeepEqual(vol.Attributes, test.expectedAttributes) {
+				if !reflect.DeepEqual(vol.VolumeContext, test.expectedVolumeContext) {
-					t.Errorf("csi server expected attributes %+v, got %+v", test.expectedAttributes, vol.Attributes)
+					t.Errorf("csi server expected volumeContext %+v, got %+v", test.expectedVolumeContext, vol.VolumeContext)
 				}
 			} else {
-				// CSIPodInfo feature is disabled, we expect no modifications to attributes.
+				// CSIPodInfo feature is disabled, we expect no modifications to volumeContext.
-				if !reflect.DeepEqual(vol.Attributes, test.attributes) {
+				if !reflect.DeepEqual(vol.VolumeContext, test.volumeContext) {
-					t.Errorf("csi server expected attributes %+v, got %+v", test.attributes, vol.Attributes)
+					t.Errorf("csi server expected volumeContext %+v, got %+v", test.volumeContext, vol.VolumeContext)
 				}
 			}
 		})

pkg/volume/csi/fake/BUILD

@@ -9,7 +9,7 @@ go_library(
     importpath = "k8s.io/kubernetes/pkg/volume/csi/fake",
     visibility = ["//visibility:public"],
     deps = [
-        "//vendor/github.com/container-storage-interface/spec/lib/go/csi/v0:go_default_library",
+        "//vendor/github.com/container-storage-interface/spec/lib/go/csi:go_default_library",
         "//vendor/google.golang.org/grpc:go_default_library",
     ],
 )

pkg/volume/csi/fake/fake_client.go

@@ -23,7 +23,7 @@ import (
 
 	"google.golang.org/grpc"
 
-	csipb "github.com/container-storage-interface/spec/lib/go/csi/v0"
+	csipb "github.com/container-storage-interface/spec/lib/go/csi"
 )
 
 // IdentityClient is a CSI identity client used for testing
@@ -57,7 +57,7 @@ func (f *IdentityClient) Probe(ctx context.Context, in *csipb.ProbeRequest, opts
 }
 
 type CSIVolume struct {
-	Attributes map[string]string
+	VolumeContext map[string]string
 	Path          string
 	MountFlags    []string
 }
@@ -99,10 +99,10 @@ func (f *NodeClient) GetNodeStagedVolumes() map[string]CSIVolume {
 	return f.nodeStagedVolumes
 }
 
-func (f *NodeClient) AddNodeStagedVolume(volID, deviceMountPath string, attributes map[string]string) {
+func (f *NodeClient) AddNodeStagedVolume(volID, deviceMountPath string, volumeContext map[string]string) {
 	f.nodeStagedVolumes[volID] = CSIVolume{
 		Path:          deviceMountPath,
-		Attributes: attributes,
+		VolumeContext: volumeContext,
 	}
 }
 
@@ -126,7 +126,7 @@ func (f *NodeClient) NodePublishVolume(ctx context.Context, req *csipb.NodePubli
 	}
 	f.nodePublishedVolumes[req.GetVolumeId()] = CSIVolume{
 		Path:          req.GetTargetPath(),
-		Attributes: req.GetVolumeAttributes(),
+		VolumeContext: req.GetVolumeContext(),
 		MountFlags:    req.GetVolumeCapability().GetMount().MountFlags,
 	}
 	return &csipb.NodePublishVolumeResponse{}, nil
@@ -173,7 +173,7 @@ func (f *NodeClient) NodeStageVolume(ctx context.Context, req *csipb.NodeStageVo
 
 	f.nodeStagedVolumes[req.GetVolumeId()] = CSIVolume{
 		Path:          req.GetStagingTargetPath(),
-		Attributes: req.GetVolumeAttributes(),
+		VolumeContext: req.GetVolumeContext(),
 	}
 	return &csipb.NodeStageVolumeResponse{}, nil
 }
@@ -195,11 +195,6 @@ func (f *NodeClient) NodeUnstageVolume(ctx context.Context, req *csipb.NodeUnsta
 	return &csipb.NodeUnstageVolumeResponse{}, nil
 }
 
-// NodeGetId implements method
-func (f *NodeClient) NodeGetId(ctx context.Context, in *csipb.NodeGetIdRequest, opts ...grpc.CallOption) (*csipb.NodeGetIdResponse, error) {
-	return nil, nil
-}
-
 // NodeGetId implements csi method
 func (f *NodeClient) NodeGetInfo(ctx context.Context, in *csipb.NodeGetInfoRequest, opts ...grpc.CallOption) (*csipb.NodeGetInfoResponse, error) {
 	if f.nextErr != nil {
@@ -227,6 +222,11 @@ func (f *NodeClient) NodeGetCapabilities(ctx context.Context, in *csipb.NodeGetC
 	return nil, nil
 }
 
+// NodeGetVolumeStats implements csi method
+func (f *NodeClient) NodeGetVolumeStats(ctx context.Context, in *csipb.NodeGetVolumeStatsRequest, opts ...grpc.CallOption) (*csipb.NodeGetVolumeStatsResponse, error) {
+	return nil, nil
+}
+
 // ControllerClient represents a CSI Controller client
 type ControllerClient struct {
 	nextCapabilities []*csipb.ControllerServiceCapability

pkg/volume/csi/nodeinfomanager/BUILD

@@ -19,7 +19,7 @@ go_library(
         "//staging/src/k8s.io/apiserver/pkg/util/feature:go_default_library",
         "//staging/src/k8s.io/client-go/util/retry:go_default_library",
         "//staging/src/k8s.io/csi-api/pkg/apis/csi/v1alpha1:go_default_library",
-        "//vendor/github.com/container-storage-interface/spec/lib/go/csi/v0:go_default_library",
+        "//vendor/github.com/container-storage-interface/spec/lib/go/csi:go_default_library",
         "//vendor/k8s.io/klog:go_default_library",
     ],
 )
@@ -61,7 +61,7 @@ go_test(
         "//staging/src/k8s.io/client-go/util/testing:go_default_library",
         "//staging/src/k8s.io/csi-api/pkg/apis/csi/v1alpha1:go_default_library",
         "//staging/src/k8s.io/csi-api/pkg/client/clientset/versioned/fake:go_default_library",
-        "//vendor/github.com/container-storage-interface/spec/lib/go/csi/v0:go_default_library",
+        "//vendor/github.com/container-storage-interface/spec/lib/go/csi:go_default_library",
         "//vendor/github.com/stretchr/testify/assert:go_default_library",
     ],
 )

pkg/volume/csi/nodeinfomanager/nodeinfomanager.go

@@ -23,7 +23,7 @@ import (
 	"fmt"
 	"strings"
 
-	csipb "github.com/container-storage-interface/spec/lib/go/csi/v0"
+	csipb "github.com/container-storage-interface/spec/lib/go/csi"
 	"k8s.io/api/core/v1"
 	"k8s.io/apimachinery/pkg/api/errors"
 	"k8s.io/apimachinery/pkg/api/resource"

pkg/volume/csi/nodeinfomanager/nodeinfomanager_test.go

@@ -21,7 +21,7 @@ import (
 	"fmt"
 	"testing"
 
-	"github.com/container-storage-interface/spec/lib/go/csi/v0"
+	"github.com/container-storage-interface/spec/lib/go/csi"
 	"github.com/stretchr/testify/assert"
 	"k8s.io/api/core/v1"
 	"k8s.io/apimachinery/pkg/api/resource"

staging/src/k8s.io/apiextensions-apiserver/Godeps/Godeps.json

@@ -820,79 +820,111 @@
 		},
 		{
 			"ImportPath": "google.golang.org/grpc",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/balancer",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
+		},
+		{
+			"ImportPath": "google.golang.org/grpc/balancer/base",
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
+		},
+		{
+			"ImportPath": "google.golang.org/grpc/balancer/roundrobin",
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/codes",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/connectivity",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/credentials",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
-			"ImportPath": "google.golang.org/grpc/grpclb/grpc_lb_v1/messages",
+			"ImportPath": "google.golang.org/grpc/encoding",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
+		},
+		{
+			"ImportPath": "google.golang.org/grpc/encoding/proto",
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/grpclog",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/health",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/health/grpc_health_v1",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/internal",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
+		},
+		{
+			"ImportPath": "google.golang.org/grpc/internal/backoff",
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
+		},
+		{
+			"ImportPath": "google.golang.org/grpc/internal/channelz",
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
+		},
+		{
+			"ImportPath": "google.golang.org/grpc/internal/grpcrand",
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/keepalive",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/metadata",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/naming",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/peer",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/resolver",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
+		},
+		{
+			"ImportPath": "google.golang.org/grpc/resolver/dns",
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
+		},
+		{
+			"ImportPath": "google.golang.org/grpc/resolver/passthrough",
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/stats",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/status",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/tap",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/transport",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "gopkg.in/inf.v0",

staging/src/k8s.io/apiserver/Godeps/Godeps.json

@@ -812,79 +812,111 @@
 		},
 		{
 			"ImportPath": "google.golang.org/grpc",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/balancer",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
+		},
+		{
+			"ImportPath": "google.golang.org/grpc/balancer/base",
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
+		},
+		{
+			"ImportPath": "google.golang.org/grpc/balancer/roundrobin",
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/codes",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/connectivity",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/credentials",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
-			"ImportPath": "google.golang.org/grpc/grpclb/grpc_lb_v1/messages",
+			"ImportPath": "google.golang.org/grpc/encoding",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
+		},
+		{
+			"ImportPath": "google.golang.org/grpc/encoding/proto",
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/grpclog",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/health",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/health/grpc_health_v1",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/internal",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
+		},
+		{
+			"ImportPath": "google.golang.org/grpc/internal/backoff",
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
+		},
+		{
+			"ImportPath": "google.golang.org/grpc/internal/channelz",
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
+		},
+		{
+			"ImportPath": "google.golang.org/grpc/internal/grpcrand",
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/keepalive",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/metadata",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/naming",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/peer",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/resolver",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
+		},
+		{
+			"ImportPath": "google.golang.org/grpc/resolver/dns",
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
+		},
+		{
+			"ImportPath": "google.golang.org/grpc/resolver/passthrough",
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/stats",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/status",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/tap",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/transport",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "gopkg.in/inf.v0",

staging/src/k8s.io/kube-aggregator/Godeps/Godeps.json

@@ -416,75 +416,107 @@
 		},
 		{
 			"ImportPath": "google.golang.org/grpc",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/balancer",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
+		},
+		{
+			"ImportPath": "google.golang.org/grpc/balancer/base",
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
+		},
+		{
+			"ImportPath": "google.golang.org/grpc/balancer/roundrobin",
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/codes",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/connectivity",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/credentials",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
-			"ImportPath": "google.golang.org/grpc/grpclb/grpc_lb_v1/messages",
+			"ImportPath": "google.golang.org/grpc/encoding",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
+		},
+		{
+			"ImportPath": "google.golang.org/grpc/encoding/proto",
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/grpclog",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/health/grpc_health_v1",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/internal",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
+		},
+		{
+			"ImportPath": "google.golang.org/grpc/internal/backoff",
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
+		},
+		{
+			"ImportPath": "google.golang.org/grpc/internal/channelz",
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
+		},
+		{
+			"ImportPath": "google.golang.org/grpc/internal/grpcrand",
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/keepalive",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/metadata",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/naming",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/peer",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/resolver",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
+		},
+		{
+			"ImportPath": "google.golang.org/grpc/resolver/dns",
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
+		},
+		{
+			"ImportPath": "google.golang.org/grpc/resolver/passthrough",
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/stats",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/status",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/tap",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/transport",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "gopkg.in/inf.v0",

staging/src/k8s.io/sample-apiserver/Godeps/Godeps.json

@@ -388,75 +388,107 @@
 		},
 		{
 			"ImportPath": "google.golang.org/grpc",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/balancer",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
+		},
+		{
+			"ImportPath": "google.golang.org/grpc/balancer/base",
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
+		},
+		{
+			"ImportPath": "google.golang.org/grpc/balancer/roundrobin",
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/codes",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/connectivity",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/credentials",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
-			"ImportPath": "google.golang.org/grpc/grpclb/grpc_lb_v1/messages",
+			"ImportPath": "google.golang.org/grpc/encoding",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
+		},
+		{
+			"ImportPath": "google.golang.org/grpc/encoding/proto",
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/grpclog",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/health/grpc_health_v1",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/internal",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
+		},
+		{
+			"ImportPath": "google.golang.org/grpc/internal/backoff",
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
+		},
+		{
+			"ImportPath": "google.golang.org/grpc/internal/channelz",
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
+		},
+		{
+			"ImportPath": "google.golang.org/grpc/internal/grpcrand",
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/keepalive",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/metadata",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/naming",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/peer",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/resolver",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
+		},
+		{
+			"ImportPath": "google.golang.org/grpc/resolver/dns",
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
+		},
+		{
+			"ImportPath": "google.golang.org/grpc/resolver/passthrough",
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/stats",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/status",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/tap",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "google.golang.org/grpc/transport",
-			"Rev": "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+			"Rev": "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
 		},
 		{
 			"ImportPath": "gopkg.in/inf.v0",

test/e2e/storage/drivers/csi.go

@@ -147,7 +147,7 @@ var _ DynamicPVTestDriver = &gcePDCSIDriver{}
 func InitGcePDCSIDriver() TestDriver {
 	return &gcePDCSIDriver{
 		driverInfo: DriverInfo{
-			Name:        "com.google.csi.gcepd",
+			Name:        "pd.csi.storage.gke.io",
 			FeatureTag:  "[Serial]",
 			MaxFileSize: testpatterns.FileSizeMedium,
 			SupportedFsType: sets.NewString(
@@ -237,7 +237,7 @@ var _ DynamicPVTestDriver = &gcePDExternalCSIDriver{}
 func InitGcePDExternalCSIDriver() TestDriver {
 	return &gcePDExternalCSIDriver{
 		driverInfo: DriverInfo{
-			Name: "com.google.csi.gcepd",
+			Name: "pd.csi.storage.gke.io",
 			// TODO(#70258): this is temporary until we can figure out how to make e2e tests a library
 			FeatureTag:  "[Feature: gcePD-external]",
 			MaxFileSize: testpatterns.FileSizeMedium,

test/e2e/storage/testsuites/volumemode.go

@@ -342,7 +342,7 @@ func testVolumeModeSuccessForDynamicPV(input *volumeModeTestInput) {
 		var err error
 
 		// TODO: This skip should be removed once #70760 is fixed
-		skipTestUntilBugfix("70760", input.driverName, []string{"com.google.csi.gcepd"})
+		skipTestUntilBugfix("70760", input.driverName, []string{"pd.csi.storage.gke.io"})
 
 		By("Creating sc")
 		input.sc, err = cs.StorageV1().StorageClasses().Create(input.sc)

test/e2e/testing-manifests/storage-csi/driver-registrar/rbac.yaml

@@ -11,7 +11,7 @@
 apiVersion: v1
 kind: ServiceAccount
 metadata:
-  name: csi-driver-registrar
+  name: csi-node-sa
   # replace with non-default namespace name
   namespace: default
 
@@ -42,7 +42,7 @@ metadata:
   name: csi-driver-registrar-role
 subjects:
   - kind: ServiceAccount
-    name: csi-driver-registrar
+    name: csi-node-sa
     # replace with non-default namespace name
     namespace: default
 roleRef:

test/e2e/testing-manifests/storage-csi/gce-pd/controller_ss.yaml

@@ -1,54 +1,51 @@
 kind: StatefulSet
 apiVersion: apps/v1
 metadata:
-  name: csi-gce-controller
+  name: csi-gce-pd-controller
 spec:
   serviceName: "csi-gce-pd"
   replicas: 1
   selector:
     matchLabels:
-      app: csi-gce-pd-driver
+      app: gcp-compute-persistent-disk-csi-driver
   template:
     metadata:
       labels:
-        app: csi-gce-pd-driver
+        app: gcp-compute-persistent-disk-csi-driver
     spec:
-      serviceAccountName: csi-controller
+      serviceAccountName: csi-controller-sa
       containers:
-        - name: csi-external-provisioner
+        - name: csi-provisioner
-          imagePullPolicy: Always
+          image: gcr.io/gke-release/csi-provisioner:v1.0.0-gke.0
-          image: gcr.io/gke-release/csi-provisioner:v0.4.1-gke.0
           args:
             - "--v=5"
-            - "--provisioner=com.google.csi.gcepd"
+            - "--provisioner=pd.csi.storage.gke.io"
             - "--csi-address=/csi/csi.sock"
           volumeMounts:
             - name: socket-dir
               mountPath: /csi
         - name: csi-attacher
-          imagePullPolicy: Always
+          image: gcr.io/gke-release/csi-attacher:v1.0.0-gke.0
-          image: gcr.io/gke-release/csi-attacher:v0.4.1-gke.0
           args:
             - "--v=5"
             - "--csi-address=/csi/csi.sock"
           volumeMounts:
             - name: socket-dir
               mountPath: /csi
-        - name: gce-driver
+        - name: gce-pd-driver
-          imagePullPolicy: Always
+          image: gcr.io/gke-release/gcp-compute-persistent-disk-csi-driver:v0.3.0-gke.0
-          image: gcr.io/gke-release/gcp-compute-persistent-disk-csi-driver:v0.2.0-gke.0
           args:
             - "--v=5"
-            - "--endpoint=unix:///csi/csi.sock"
+            - "--endpoint=unix:/csi/csi.sock"
           env:
             - name: GOOGLE_APPLICATION_CREDENTIALS
-              value: "/etc/service-account/cloud-sa.json"
+              value: "/etc/cloud-sa/cloud-sa.json"
           volumeMounts:
             - name: socket-dir
               mountPath: /csi
             - name: cloud-sa-volume
               readOnly: true
-              mountPath: "/etc/service-account"
+              mountPath: "/etc/cloud-sa"
       volumes:
         - name: socket-dir
           emptyDir: {}

test/e2e/testing-manifests/storage-csi/gce-pd/csi-controller-rbac.yaml

@@ -1,7 +1,7 @@
 apiVersion: v1
 kind: ServiceAccount
 metadata:
-  name: csi-controller
+  name: csi-controller-sa
 
 ---
 kind: ClusterRoleBinding
@@ -10,7 +10,7 @@ metadata:
   name: csi-controller-attacher-role
 subjects:
   - kind: ServiceAccount
-    name: csi-controller
+    name: csi-controller-sa
     namespace: default
 roleRef:
   kind: ClusterRole
@@ -25,7 +25,7 @@ metadata:
   namespace: default
 subjects:
   - kind: ServiceAccount
-    name: csi-controller
+    name: csi-controller-sa
     namespace: default
 roleRef:
   kind: Role
@@ -38,7 +38,7 @@ metadata:
   name: csi-controller-provisioner-role
 subjects:
   - kind: ServiceAccount
-    name: csi-controller
+    name: csi-controller-sa
     namespace: default
 roleRef:
   kind: ClusterRole
@@ -53,7 +53,7 @@ metadata:
   namespace: default
 subjects:
   - kind: ServiceAccount
-    name: csi-controller
+    name: csi-controller-sa
     namespace: default
 roleRef:
   kind: Role
@@ -67,10 +67,10 @@ metadata:
   name: psp-csi-controller-driver-registrar-role
 subjects:
   - kind: ServiceAccount
-    name: csi-controller
+    name: csi-controller-sa
     namespace: default
   - kind: ServiceAccount
-    name: csi-driver-registrar
+    name: csi-node-sa
     namespace: default
 roleRef:
   kind: ClusterRole

test/e2e/testing-manifests/storage-csi/gce-pd/node_ds.yaml

@@ -1,26 +1,28 @@
 kind: DaemonSet
 apiVersion: apps/v1
 metadata:
-  name: csi-gce-node
+  name: csi-gce-pd-node
 spec:
   selector:
     matchLabels:
-      app: csi-gce-driver
+      app: gcp-compute-persistent-disk-csi-driver
-  serviceName: csi-gce
   template:
     metadata:
       labels:
-        app: csi-gce-driver
+        app: gcp-compute-persistent-disk-csi-driver
     spec:
-      serviceAccountName: csi-driver-registrar
+      serviceAccountName: csi-node-sa
       containers:
         - name: csi-driver-registrar
-          imagePullPolicy: Always
+          image: gcr.io/gke-release/csi-driver-registrar:v1.0.0-gke.0
-          image: gcr.io/gke-release/csi-driver-registrar:v0.4.1-gke.0
           args:
             - "--v=5"
-            - "--csi-address=/csi/csi.sock"
+            - "--csi-address=/var/lib/kubelet/plugins/pd.csi.storage.gke.io/csi.sock"
-            - "--kubelet-registration-path=/var/lib/kubelet/plugins/com.google.csi.gcepd/csi.sock"
+            - "--kubelet-registration-path=/var/lib/kubelet/plugins/pd.csi.storage.gke.io/csi.sock"
+          lifecycle:
+            preStop:
+              exec:
+                command: ["/bin/sh", "-c", "rm -rf /registration/pd.csi.storage.gke.io /registration/pd.csi.storage.gke.io-reg.sock"]
           env:
             - name: KUBE_NODE_NAME
               valueFrom:
@@ -28,17 +30,16 @@ spec:
                   fieldPath: spec.nodeName
           volumeMounts:
             - name: plugin-dir
-              mountPath: /csi
+              mountPath: /var/lib/kubelet/plugins/pd.csi.storage.gke.io/
             - name: registration-dir
               mountPath: /registration
-        - name: gce-driver
+        - name: gce-pd-driver
           securityContext:
             privileged: true
-          imagePullPolicy: Always
+          image: gcr.io/gke-release/gcp-compute-persistent-disk-csi-driver:v0.3.0-gke.0
-          image: gcr.io/gke-release/gcp-compute-persistent-disk-csi-driver:v0.2.0-gke.0
           args:
             - "--v=5"
-            - "--endpoint=unix:///csi/csi.sock"
+            - "--endpoint=unix:/csi/csi.sock"
           volumeMounts:
             - name: kubelet-dir
               mountPath: /var/lib/kubelet
@@ -67,7 +68,7 @@ spec:
             type: Directory
         - name: plugin-dir
           hostPath:
-            path: /var/lib/kubelet/plugins/com.google.csi.gcepd/
+            path: /var/lib/kubelet/plugins/pd.csi.storage.gke.io/
             type: DirectoryOrCreate
         - name: device-dir
           hostPath:
@@ -90,4 +91,3 @@ spec:
           hostPath:
             path: /sys
             type: Directory
-

test/e2e/testing-manifests/storage-csi/hostpath/hostpath/csi-hostpath-attacher.yaml

@@ -30,7 +30,7 @@ spec:
       serviceAccountName: csi-attacher
       containers:
         - name: csi-attacher
-          image: quay.io/k8scsi/csi-attacher:v0.4.1
+          image: gcr.io/gke-release/csi-attacher:v1.0.0-gke.0
           args:
             - --v=5
             - --csi-address=$(ADDRESS)

test/e2e/testing-manifests/storage-csi/hostpath/hostpath/csi-hostpath-provisioner.yaml

@@ -30,7 +30,7 @@ spec:
       serviceAccountName: csi-provisioner
       containers:
         - name: csi-provisioner
-          image: quay.io/k8scsi/csi-provisioner:v0.4.1
+          image: gcr.io/gke-release/csi-provisioner:v1.0.0-gke.0
           args:
             - "--provisioner=csi-hostpath"
             - "--csi-address=$(ADDRESS)"

test/e2e/testing-manifests/storage-csi/hostpath/hostpath/csi-hostpathplugin.yaml

@@ -11,11 +11,11 @@ spec:
       labels:
         app: csi-hostpathplugin
     spec:
-      serviceAccountName: csi-driver-registrar
+      serviceAccountName: csi-node-sa
       hostNetwork: true
       containers:
         - name: driver-registrar
-          image: quay.io/k8scsi/driver-registrar:v0.4.1
+          image: gcr.io/gke-release/csi-driver-registrar:v1.0.0-gke.0
           args:
             - --v=5
             - --csi-address=/csi/csi.sock
@@ -33,7 +33,7 @@ spec:
           - mountPath: /registration
             name: registration-dir
         - name: hostpath
-          image: quay.io/k8scsi/hostpathplugin:v0.4.1
+          image: quay.io/k8scsi/hostpathplugin:v1.0.0
           args:
             - "--v=5"
             - "--endpoint=$(CSI_ENDPOINT)"

test/e2e/testing-manifests/storage-csi/hostpath/hostpath/e2e-test-rbac.yaml

@@ -8,7 +8,7 @@ subjects:
     name: csi-attacher
     namespace: default
   - kind: ServiceAccount
-    name: csi-driver-registrar
+    name: csi-node-sa
     namespace: default
   - kind: ServiceAccount
     name: csi-provisioner

test/integration/master/synthetic_master_test.go

@@ -304,7 +304,7 @@ func TestObjectSizeResponses(t *testing.T) {
 	const DeploymentTwoMegabyteSize = 1000000
 
 	expectedMsgFor1MB := `etcdserver: request is too large`
-	expectedMsgFor2MB := `rpc error: code = ResourceExhausted desc = grpc: trying to send message larger than max`
+	expectedMsgFor2MB := `rpc error: code = ResourceExhausted desc = trying to send message larger than max`
 	expectedMsgForLargeAnnotation := `metadata.annotations: Too long: must have at most 262144 characters`
 
 	deployment1 := constructBody("a", DeploymentMegabyteSize, "labels", t)    // >1 MB file

vendor/BUILD

@@ -94,7 +94,7 @@ filegroup(
         "//vendor/github.com/cloudflare/cfssl/ubiquity:all-srcs",
         "//vendor/github.com/clusterhq/flocker-go:all-srcs",
         "//vendor/github.com/codedellemc/goscaleio:all-srcs",
-        "//vendor/github.com/container-storage-interface/spec/lib/go/csi/v0:all-srcs",
+        "//vendor/github.com/container-storage-interface/spec/lib/go/csi:all-srcs",
         "//vendor/github.com/containerd/console:all-srcs",
         "//vendor/github.com/containerd/containerd/api/services/containers/v1:all-srcs",
         "//vendor/github.com/containerd/containerd/api/services/tasks/v1:all-srcs",
@@ -239,6 +239,7 @@ filegroup(
         "//vendor/github.com/golang/mock/gomock:all-srcs",
         "//vendor/github.com/golang/protobuf/jsonpb:all-srcs",
         "//vendor/github.com/golang/protobuf/proto:all-srcs",
+        "//vendor/github.com/golang/protobuf/protoc-gen-go/descriptor:all-srcs",
         "//vendor/github.com/golang/protobuf/ptypes:all-srcs",
         "//vendor/github.com/google/btree:all-srcs",
         "//vendor/github.com/google/cadvisor/accelerators:all-srcs",

vendor/github.com/container-storage-interface/spec/lib/go/csi/BUILD

@@ -3,11 +3,13 @@ load("@io_bazel_rules_go//go:def.bzl", "go_library")
 go_library(
     name = "go_default_library",
     srcs = ["csi.pb.go"],
-    importmap = "k8s.io/kubernetes/vendor/github.com/container-storage-interface/spec/lib/go/csi/v0",
+    importmap = "k8s.io/kubernetes/vendor/github.com/container-storage-interface/spec/lib/go/csi",
-    importpath = "github.com/container-storage-interface/spec/lib/go/csi/v0",
+    importpath = "github.com/container-storage-interface/spec/lib/go/csi",
     visibility = ["//visibility:public"],
     deps = [
         "//vendor/github.com/golang/protobuf/proto:go_default_library",
+        "//vendor/github.com/golang/protobuf/protoc-gen-go/descriptor:go_default_library",
+        "//vendor/github.com/golang/protobuf/ptypes/timestamp:go_default_library",
         "//vendor/github.com/golang/protobuf/ptypes/wrappers:go_default_library",
         "//vendor/golang.org/x/net/context:go_default_library",
         "//vendor/google.golang.org/grpc:go_default_library",

vendor/github.com/golang/protobuf/protoc-gen-go/descriptor/BUILD

@@ -0,0 +1,24 @@
+load("@io_bazel_rules_go//go:def.bzl", "go_library")
+
+go_library(
+    name = "go_default_library",
+    srcs = ["descriptor.pb.go"],
+    importmap = "k8s.io/kubernetes/vendor/github.com/golang/protobuf/protoc-gen-go/descriptor",
+    importpath = "github.com/golang/protobuf/protoc-gen-go/descriptor",
+    visibility = ["//visibility:public"],
+    deps = ["//vendor/github.com/golang/protobuf/proto:go_default_library"],
+)
+
+filegroup(
+    name = "package-srcs",
+    srcs = glob(["**"]),
+    tags = ["automanaged"],
+    visibility = ["//visibility:private"],
+)
+
+filegroup(
+    name = "all-srcs",
+    srcs = [":package-srcs"],
+    tags = ["automanaged"],
+    visibility = ["//visibility:public"],
+)

vendor/github.com/golang/protobuf/protoc-gen-go/descriptor/descriptor.proto

@@ -0,0 +1,872 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2008 Google Inc.  All rights reserved.
+// https://developers.google.com/protocol-buffers/
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Author: kenton@google.com (Kenton Varda)
+//  Based on original Protocol Buffers design by
+//  Sanjay Ghemawat, Jeff Dean, and others.
+//
+// The messages in this file describe the definitions found in .proto files.
+// A valid .proto file can be translated directly to a FileDescriptorProto
+// without any other information (e.g. without reading its imports).
+
+
+syntax = "proto2";
+
+package google.protobuf;
+option go_package = "github.com/golang/protobuf/protoc-gen-go/descriptor;descriptor";
+option java_package = "com.google.protobuf";
+option java_outer_classname = "DescriptorProtos";
+option csharp_namespace = "Google.Protobuf.Reflection";
+option objc_class_prefix = "GPB";
+option cc_enable_arenas = true;
+
+// descriptor.proto must be optimized for speed because reflection-based
+// algorithms don't work during bootstrapping.
+option optimize_for = SPEED;
+
+// The protocol compiler can output a FileDescriptorSet containing the .proto
+// files it parses.
+message FileDescriptorSet {
+  repeated FileDescriptorProto file = 1;
+}
+
+// Describes a complete .proto file.
+message FileDescriptorProto {
+  optional string name = 1;       // file name, relative to root of source tree
+  optional string package = 2;    // e.g. "foo", "foo.bar", etc.
+
+  // Names of files imported by this file.
+  repeated string dependency = 3;
+  // Indexes of the public imported files in the dependency list above.
+  repeated int32 public_dependency = 10;
+  // Indexes of the weak imported files in the dependency list.
+  // For Google-internal migration only. Do not use.
+  repeated int32 weak_dependency = 11;
+
+  // All top-level definitions in this file.
+  repeated DescriptorProto message_type = 4;
+  repeated EnumDescriptorProto enum_type = 5;
+  repeated ServiceDescriptorProto service = 6;
+  repeated FieldDescriptorProto extension = 7;
+
+  optional FileOptions options = 8;
+
+  // This field contains optional information about the original source code.
+  // You may safely remove this entire field without harming runtime
+  // functionality of the descriptors -- the information is needed only by
+  // development tools.
+  optional SourceCodeInfo source_code_info = 9;
+
+  // The syntax of the proto file.
+  // The supported values are "proto2" and "proto3".
+  optional string syntax = 12;
+}
+
+// Describes a message type.
+message DescriptorProto {
+  optional string name = 1;
+
+  repeated FieldDescriptorProto field = 2;
+  repeated FieldDescriptorProto extension = 6;
+
+  repeated DescriptorProto nested_type = 3;
+  repeated EnumDescriptorProto enum_type = 4;
+
+  message ExtensionRange {
+    optional int32 start = 1;
+    optional int32 end = 2;
+
+    optional ExtensionRangeOptions options = 3;
+  }
+  repeated ExtensionRange extension_range = 5;
+
+  repeated OneofDescriptorProto oneof_decl = 8;
+
+  optional MessageOptions options = 7;
+
+  // Range of reserved tag numbers. Reserved tag numbers may not be used by
+  // fields or extension ranges in the same message. Reserved ranges may
+  // not overlap.
+  message ReservedRange {
+    optional int32 start = 1; // Inclusive.
+    optional int32 end = 2;   // Exclusive.
+  }
+  repeated ReservedRange reserved_range = 9;
+  // Reserved field names, which may not be used by fields in the same message.
+  // A given name may only be reserved once.
+  repeated string reserved_name = 10;
+}
+
+message ExtensionRangeOptions {
+  // The parser stores options it doesn't recognize here. See above.
+  repeated UninterpretedOption uninterpreted_option = 999;
+
+  // Clients can define custom options in extensions of this message. See above.
+  extensions 1000 to max;
+}
+
+// Describes a field within a message.
+message FieldDescriptorProto {
+  enum Type {
+    // 0 is reserved for errors.
+    // Order is weird for historical reasons.
+    TYPE_DOUBLE         = 1;
+    TYPE_FLOAT          = 2;
+    // Not ZigZag encoded.  Negative numbers take 10 bytes.  Use TYPE_SINT64 if
+    // negative values are likely.
+    TYPE_INT64          = 3;
+    TYPE_UINT64         = 4;
+    // Not ZigZag encoded.  Negative numbers take 10 bytes.  Use TYPE_SINT32 if
+    // negative values are likely.
+    TYPE_INT32          = 5;
+    TYPE_FIXED64        = 6;
+    TYPE_FIXED32        = 7;
+    TYPE_BOOL           = 8;
+    TYPE_STRING         = 9;
+    // Tag-delimited aggregate.
+    // Group type is deprecated and not supported in proto3. However, Proto3
+    // implementations should still be able to parse the group wire format and
+    // treat group fields as unknown fields.
+    TYPE_GROUP          = 10;
+    TYPE_MESSAGE        = 11;  // Length-delimited aggregate.
+
+    // New in version 2.
+    TYPE_BYTES          = 12;
+    TYPE_UINT32         = 13;
+    TYPE_ENUM           = 14;
+    TYPE_SFIXED32       = 15;
+    TYPE_SFIXED64       = 16;
+    TYPE_SINT32         = 17;  // Uses ZigZag encoding.
+    TYPE_SINT64         = 18;  // Uses ZigZag encoding.
+  };
+
+  enum Label {
+    // 0 is reserved for errors
+    LABEL_OPTIONAL      = 1;
+    LABEL_REQUIRED      = 2;
+    LABEL_REPEATED      = 3;
+  };
+
+  optional string name = 1;
+  optional int32 number = 3;
+  optional Label label = 4;
+
+  // If type_name is set, this need not be set.  If both this and type_name
+  // are set, this must be one of TYPE_ENUM, TYPE_MESSAGE or TYPE_GROUP.
+  optional Type type = 5;
+
+  // For message and enum types, this is the name of the type.  If the name
+  // starts with a '.', it is fully-qualified.  Otherwise, C++-like scoping
+  // rules are used to find the type (i.e. first the nested types within this
+  // message are searched, then within the parent, on up to the root
+  // namespace).
+  optional string type_name = 6;
+
+  // For extensions, this is the name of the type being extended.  It is
+  // resolved in the same manner as type_name.
+  optional string extendee = 2;
+
+  // For numeric types, contains the original text representation of the value.
+  // For booleans, "true" or "false".
+  // For strings, contains the default text contents (not escaped in any way).
+  // For bytes, contains the C escaped value.  All bytes >= 128 are escaped.
+  // TODO(kenton):  Base-64 encode?
+  optional string default_value = 7;
+
+  // If set, gives the index of a oneof in the containing type's oneof_decl
+  // list.  This field is a member of that oneof.
+  optional int32 oneof_index = 9;
+
+  // JSON name of this field. The value is set by protocol compiler. If the
+  // user has set a "json_name" option on this field, that option's value
+  // will be used. Otherwise, it's deduced from the field's name by converting
+  // it to camelCase.
+  optional string json_name = 10;
+
+  optional FieldOptions options = 8;
+}
+
+// Describes a oneof.
+message OneofDescriptorProto {
+  optional string name = 1;
+  optional OneofOptions options = 2;
+}
+
+// Describes an enum type.
+message EnumDescriptorProto {
+  optional string name = 1;
+
+  repeated EnumValueDescriptorProto value = 2;
+
+  optional EnumOptions options = 3;
+
+  // Range of reserved numeric values. Reserved values may not be used by
+  // entries in the same enum. Reserved ranges may not overlap.
+  //
+  // Note that this is distinct from DescriptorProto.ReservedRange in that it
+  // is inclusive such that it can appropriately represent the entire int32
+  // domain.
+  message EnumReservedRange {
+    optional int32 start = 1; // Inclusive.
+    optional int32 end = 2;   // Inclusive.
+  }
+
+  // Range of reserved numeric values. Reserved numeric values may not be used
+  // by enum values in the same enum declaration. Reserved ranges may not
+  // overlap.
+  repeated EnumReservedRange reserved_range = 4;
+
+  // Reserved enum value names, which may not be reused. A given name may only
+  // be reserved once.
+  repeated string reserved_name = 5;
+}
+
+// Describes a value within an enum.
+message EnumValueDescriptorProto {
+  optional string name = 1;
+  optional int32 number = 2;
+
+  optional EnumValueOptions options = 3;
+}
+
+// Describes a service.
+message ServiceDescriptorProto {
+  optional string name = 1;
+  repeated MethodDescriptorProto method = 2;
+
+  optional ServiceOptions options = 3;
+}
+
+// Describes a method of a service.
+message MethodDescriptorProto {
+  optional string name = 1;
+
+  // Input and output type names.  These are resolved in the same way as
+  // FieldDescriptorProto.type_name, but must refer to a message type.
+  optional string input_type = 2;
+  optional string output_type = 3;
+
+  optional MethodOptions options = 4;
+
+  // Identifies if client streams multiple client messages
+  optional bool client_streaming = 5 [default=false];
+  // Identifies if server streams multiple server messages
+  optional bool server_streaming = 6 [default=false];
+}
+
+
+// ===================================================================
+// Options
+
+// Each of the definitions above may have "options" attached.  These are
+// just annotations which may cause code to be generated slightly differently
+// or may contain hints for code that manipulates protocol messages.
+//
+// Clients may define custom options as extensions of the *Options messages.
+// These extensions may not yet be known at parsing time, so the parser cannot
+// store the values in them.  Instead it stores them in a field in the *Options
+// message called uninterpreted_option. This field must have the same name
+// across all *Options messages. We then use this field to populate the
+// extensions when we build a descriptor, at which point all protos have been
+// parsed and so all extensions are known.
+//
+// Extension numbers for custom options may be chosen as follows:
+// * For options which will only be used within a single application or
+//   organization, or for experimental options, use field numbers 50000
+//   through 99999.  It is up to you to ensure that you do not use the
+//   same number for multiple options.
+// * For options which will be published and used publicly by multiple
+//   independent entities, e-mail protobuf-global-extension-registry@google.com
+//   to reserve extension numbers. Simply provide your project name (e.g.
+//   Objective-C plugin) and your project website (if available) -- there's no
+//   need to explain how you intend to use them. Usually you only need one
+//   extension number. You can declare multiple options with only one extension
+//   number by putting them in a sub-message. See the Custom Options section of
+//   the docs for examples:
+//   https://developers.google.com/protocol-buffers/docs/proto#options
+//   If this turns out to be popular, a web service will be set up
+//   to automatically assign option numbers.
+
+
+message FileOptions {
+
+  // Sets the Java package where classes generated from this .proto will be
+  // placed.  By default, the proto package is used, but this is often
+  // inappropriate because proto packages do not normally start with backwards
+  // domain names.
+  optional string java_package = 1;
+
+
+  // If set, all the classes from the .proto file are wrapped in a single
+  // outer class with the given name.  This applies to both Proto1
+  // (equivalent to the old "--one_java_file" option) and Proto2 (where
+  // a .proto always translates to a single class, but you may want to
+  // explicitly choose the class name).
+  optional string java_outer_classname = 8;
+
+  // If set true, then the Java code generator will generate a separate .java
+  // file for each top-level message, enum, and service defined in the .proto
+  // file.  Thus, these types will *not* be nested inside the outer class
+  // named by java_outer_classname.  However, the outer class will still be
+  // generated to contain the file's getDescriptor() method as well as any
+  // top-level extensions defined in the file.
+  optional bool java_multiple_files = 10 [default=false];
+
+  // This option does nothing.
+  optional bool java_generate_equals_and_hash = 20 [deprecated=true];
+
+  // If set true, then the Java2 code generator will generate code that
+  // throws an exception whenever an attempt is made to assign a non-UTF-8
+  // byte sequence to a string field.
+  // Message reflection will do the same.
+  // However, an extension field still accepts non-UTF-8 byte sequences.
+  // This option has no effect on when used with the lite runtime.
+  optional bool java_string_check_utf8 = 27 [default=false];
+
+
+  // Generated classes can be optimized for speed or code size.
+  enum OptimizeMode {
+    SPEED = 1;        // Generate complete code for parsing, serialization,
+                      // etc.
+    CODE_SIZE = 2;    // Use ReflectionOps to implement these methods.
+    LITE_RUNTIME = 3; // Generate code using MessageLite and the lite runtime.
+  }
+  optional OptimizeMode optimize_for = 9 [default=SPEED];
+
+  // Sets the Go package where structs generated from this .proto will be
+  // placed. If omitted, the Go package will be derived from the following:
+  //   - The basename of the package import path, if provided.
+  //   - Otherwise, the package statement in the .proto file, if present.
+  //   - Otherwise, the basename of the .proto file, without extension.
+  optional string go_package = 11;
+
+
+
+  // Should generic services be generated in each language?  "Generic" services
+  // are not specific to any particular RPC system.  They are generated by the
+  // main code generators in each language (without additional plugins).
+  // Generic services were the only kind of service generation supported by
+  // early versions of google.protobuf.
+  //
+  // Generic services are now considered deprecated in favor of using plugins
+  // that generate code specific to your particular RPC system.  Therefore,
+  // these default to false.  Old code which depends on generic services should
+  // explicitly set them to true.
+  optional bool cc_generic_services = 16 [default=false];
+  optional bool java_generic_services = 17 [default=false];
+  optional bool py_generic_services = 18 [default=false];
+  optional bool php_generic_services = 42 [default=false];
+
+  // Is this file deprecated?
+  // Depending on the target platform, this can emit Deprecated annotations
+  // for everything in the file, or it will be completely ignored; in the very
+  // least, this is a formalization for deprecating files.
+  optional bool deprecated = 23 [default=false];
+
+  // Enables the use of arenas for the proto messages in this file. This applies
+  // only to generated classes for C++.
+  optional bool cc_enable_arenas = 31 [default=false];
+
+
+  // Sets the objective c class prefix which is prepended to all objective c
+  // generated classes from this .proto. There is no default.
+  optional string objc_class_prefix = 36;
+
+  // Namespace for generated classes; defaults to the package.
+  optional string csharp_namespace = 37;
+
+  // By default Swift generators will take the proto package and CamelCase it
+  // replacing '.' with underscore and use that to prefix the types/symbols
+  // defined. When this options is provided, they will use this value instead
+  // to prefix the types/symbols defined.
+  optional string swift_prefix = 39;
+
+  // Sets the php class prefix which is prepended to all php generated classes
+  // from this .proto. Default is empty.
+  optional string php_class_prefix = 40;
+
+  // Use this option to change the namespace of php generated classes. Default
+  // is empty. When this option is empty, the package name will be used for
+  // determining the namespace.
+  optional string php_namespace = 41;
+
+  // The parser stores options it doesn't recognize here.
+  // See the documentation for the "Options" section above.
+  repeated UninterpretedOption uninterpreted_option = 999;
+
+  // Clients can define custom options in extensions of this message.
+  // See the documentation for the "Options" section above.
+  extensions 1000 to max;
+
+  reserved 38;
+}
+
+message MessageOptions {
+  // Set true to use the old proto1 MessageSet wire format for extensions.
+  // This is provided for backwards-compatibility with the MessageSet wire
+  // format.  You should not use this for any other reason:  It's less
+  // efficient, has fewer features, and is more complicated.
+  //
+  // The message must be defined exactly as follows:
+  //   message Foo {
+  //     option message_set_wire_format = true;
+  //     extensions 4 to max;
+  //   }
+  // Note that the message cannot have any defined fields; MessageSets only
+  // have extensions.
+  //
+  // All extensions of your type must be singular messages; e.g. they cannot
+  // be int32s, enums, or repeated messages.
+  //
+  // Because this is an option, the above two restrictions are not enforced by
+  // the protocol compiler.
+  optional bool message_set_wire_format = 1 [default=false];
+
+  // Disables the generation of the standard "descriptor()" accessor, which can
+  // conflict with a field of the same name.  This is meant to make migration
+  // from proto1 easier; new code should avoid fields named "descriptor".
+  optional bool no_standard_descriptor_accessor = 2 [default=false];
+
+  // Is this message deprecated?
+  // Depending on the target platform, this can emit Deprecated annotations
+  // for the message, or it will be completely ignored; in the very least,
+  // this is a formalization for deprecating messages.
+  optional bool deprecated = 3 [default=false];
+
+  // Whether the message is an automatically generated map entry type for the
+  // maps field.
+  //
+  // For maps fields:
+  //     map<KeyType, ValueType> map_field = 1;
+  // The parsed descriptor looks like:
+  //     message MapFieldEntry {
+  //         option map_entry = true;
+  //         optional KeyType key = 1;
+  //         optional ValueType value = 2;
+  //     }
+  //     repeated MapFieldEntry map_field = 1;
+  //
+  // Implementations may choose not to generate the map_entry=true message, but
+  // use a native map in the target language to hold the keys and values.
+  // The reflection APIs in such implementions still need to work as
+  // if the field is a repeated message field.
+  //
+  // NOTE: Do not set the option in .proto files. Always use the maps syntax
+  // instead. The option should only be implicitly set by the proto compiler
+  // parser.
+  optional bool map_entry = 7;
+
+  reserved 8;  // javalite_serializable
+  reserved 9;  // javanano_as_lite
+
+  // The parser stores options it doesn't recognize here. See above.
+  repeated UninterpretedOption uninterpreted_option = 999;
+
+  // Clients can define custom options in extensions of this message. See above.
+  extensions 1000 to max;
+}
+
+message FieldOptions {
+  // The ctype option instructs the C++ code generator to use a different
+  // representation of the field than it normally would.  See the specific
+  // options below.  This option is not yet implemented in the open source
+  // release -- sorry, we'll try to include it in a future version!
+  optional CType ctype = 1 [default = STRING];
+  enum CType {
+    // Default mode.
+    STRING = 0;
+
+    CORD = 1;
+
+    STRING_PIECE = 2;
+  }
+  // The packed option can be enabled for repeated primitive fields to enable
+  // a more efficient representation on the wire. Rather than repeatedly
+  // writing the tag and type for each element, the entire array is encoded as
+  // a single length-delimited blob. In proto3, only explicit setting it to
+  // false will avoid using packed encoding.
+  optional bool packed = 2;
+
+  // The jstype option determines the JavaScript type used for values of the
+  // field.  The option is permitted only for 64 bit integral and fixed types
+  // (int64, uint64, sint64, fixed64, sfixed64).  A field with jstype JS_STRING
+  // is represented as JavaScript string, which avoids loss of precision that
+  // can happen when a large value is converted to a floating point JavaScript.
+  // Specifying JS_NUMBER for the jstype causes the generated JavaScript code to
+  // use the JavaScript "number" type.  The behavior of the default option
+  // JS_NORMAL is implementation dependent.
+  //
+  // This option is an enum to permit additional types to be added, e.g.
+  // goog.math.Integer.
+  optional JSType jstype = 6 [default = JS_NORMAL];
+  enum JSType {
+    // Use the default type.
+    JS_NORMAL = 0;
+
+    // Use JavaScript strings.
+    JS_STRING = 1;
+
+    // Use JavaScript numbers.
+    JS_NUMBER = 2;
+  }
+
+  // Should this field be parsed lazily?  Lazy applies only to message-type
+  // fields.  It means that when the outer message is initially parsed, the
+  // inner message's contents will not be parsed but instead stored in encoded
+  // form.  The inner message will actually be parsed when it is first accessed.
+  //
+  // This is only a hint.  Implementations are free to choose whether to use
+  // eager or lazy parsing regardless of the value of this option.  However,
+  // setting this option true suggests that the protocol author believes that
+  // using lazy parsing on this field is worth the additional bookkeeping
+  // overhead typically needed to implement it.
+  //
+  // This option does not affect the public interface of any generated code;
+  // all method signatures remain the same.  Furthermore, thread-safety of the
+  // interface is not affected by this option; const methods remain safe to
+  // call from multiple threads concurrently, while non-const methods continue
+  // to require exclusive access.
+  //
+  //
+  // Note that implementations may choose not to check required fields within
+  // a lazy sub-message.  That is, calling IsInitialized() on the outer message
+  // may return true even if the inner message has missing required fields.
+  // This is necessary because otherwise the inner message would have to be
+  // parsed in order to perform the check, defeating the purpose of lazy
+  // parsing.  An implementation which chooses not to check required fields
+  // must be consistent about it.  That is, for any particular sub-message, the
+  // implementation must either *always* check its required fields, or *never*
+  // check its required fields, regardless of whether or not the message has
+  // been parsed.
+  optional bool lazy = 5 [default=false];
+
+  // Is this field deprecated?
+  // Depending on the target platform, this can emit Deprecated annotations
+  // for accessors, or it will be completely ignored; in the very least, this
+  // is a formalization for deprecating fields.
+  optional bool deprecated = 3 [default=false];
+
+  // For Google-internal migration only. Do not use.
+  optional bool weak = 10 [default=false];
+
+
+  // The parser stores options it doesn't recognize here. See above.
+  repeated UninterpretedOption uninterpreted_option = 999;
+
+  // Clients can define custom options in extensions of this message. See above.
+  extensions 1000 to max;
+
+  reserved 4;  // removed jtype
+}
+
+message OneofOptions {
+  // The parser stores options it doesn't recognize here. See above.
+  repeated UninterpretedOption uninterpreted_option = 999;
+
+  // Clients can define custom options in extensions of this message. See above.
+  extensions 1000 to max;
+}
+
+message EnumOptions {
+
+  // Set this option to true to allow mapping different tag names to the same
+  // value.
+  optional bool allow_alias = 2;
+
+  // Is this enum deprecated?
+  // Depending on the target platform, this can emit Deprecated annotations
+  // for the enum, or it will be completely ignored; in the very least, this
+  // is a formalization for deprecating enums.
+  optional bool deprecated = 3 [default=false];
+
+  reserved 5;  // javanano_as_lite
+
+  // The parser stores options it doesn't recognize here. See above.
+  repeated UninterpretedOption uninterpreted_option = 999;
+
+  // Clients can define custom options in extensions of this message. See above.
+  extensions 1000 to max;
+}
+
+message EnumValueOptions {
+  // Is this enum value deprecated?
+  // Depending on the target platform, this can emit Deprecated annotations
+  // for the enum value, or it will be completely ignored; in the very least,
+  // this is a formalization for deprecating enum values.
+  optional bool deprecated = 1 [default=false];
+
+  // The parser stores options it doesn't recognize here. See above.
+  repeated UninterpretedOption uninterpreted_option = 999;
+
+  // Clients can define custom options in extensions of this message. See above.
+  extensions 1000 to max;
+}
+
+message ServiceOptions {
+
+  // Note:  Field numbers 1 through 32 are reserved for Google's internal RPC
+  //   framework.  We apologize for hoarding these numbers to ourselves, but
+  //   we were already using them long before we decided to release Protocol
+  //   Buffers.
+
+  // Is this service deprecated?
+  // Depending on the target platform, this can emit Deprecated annotations
+  // for the service, or it will be completely ignored; in the very least,
+  // this is a formalization for deprecating services.
+  optional bool deprecated = 33 [default=false];
+
+  // The parser stores options it doesn't recognize here. See above.
+  repeated UninterpretedOption uninterpreted_option = 999;
+
+  // Clients can define custom options in extensions of this message. See above.
+  extensions 1000 to max;
+}
+
+message MethodOptions {
+
+  // Note:  Field numbers 1 through 32 are reserved for Google's internal RPC
+  //   framework.  We apologize for hoarding these numbers to ourselves, but
+  //   we were already using them long before we decided to release Protocol
+  //   Buffers.
+
+  // Is this method deprecated?
+  // Depending on the target platform, this can emit Deprecated annotations
+  // for the method, or it will be completely ignored; in the very least,
+  // this is a formalization for deprecating methods.
+  optional bool deprecated = 33 [default=false];
+
+  // Is this method side-effect-free (or safe in HTTP parlance), or idempotent,
+  // or neither? HTTP based RPC implementation may choose GET verb for safe
+  // methods, and PUT verb for idempotent methods instead of the default POST.
+  enum IdempotencyLevel {
+    IDEMPOTENCY_UNKNOWN = 0;
+    NO_SIDE_EFFECTS     = 1; // implies idempotent
+    IDEMPOTENT          = 2; // idempotent, but may have side effects
+  }
+  optional IdempotencyLevel idempotency_level =
+      34 [default=IDEMPOTENCY_UNKNOWN];
+
+  // The parser stores options it doesn't recognize here. See above.
+  repeated UninterpretedOption uninterpreted_option = 999;
+
+  // Clients can define custom options in extensions of this message. See above.
+  extensions 1000 to max;
+}
+
+
+// A message representing a option the parser does not recognize. This only
+// appears in options protos created by the compiler::Parser class.
+// DescriptorPool resolves these when building Descriptor objects. Therefore,
+// options protos in descriptor objects (e.g. returned by Descriptor::options(),
+// or produced by Descriptor::CopyTo()) will never have UninterpretedOptions
+// in them.
+message UninterpretedOption {
+  // The name of the uninterpreted option.  Each string represents a segment in
+  // a dot-separated name.  is_extension is true iff a segment represents an
+  // extension (denoted with parentheses in options specs in .proto files).
+  // E.g.,{ ["foo", false], ["bar.baz", true], ["qux", false] } represents
+  // "foo.(bar.baz).qux".
+  message NamePart {
+    required string name_part = 1;
+    required bool is_extension = 2;
+  }
+  repeated NamePart name = 2;
+
+  // The value of the uninterpreted option, in whatever type the tokenizer
+  // identified it as during parsing. Exactly one of these should be set.
+  optional string identifier_value = 3;
+  optional uint64 positive_int_value = 4;
+  optional int64 negative_int_value = 5;
+  optional double double_value = 6;
+  optional bytes string_value = 7;
+  optional string aggregate_value = 8;
+}
+
+// ===================================================================
+// Optional source code info
+
+// Encapsulates information about the original source file from which a
+// FileDescriptorProto was generated.
+message SourceCodeInfo {
+  // A Location identifies a piece of source code in a .proto file which
+  // corresponds to a particular definition.  This information is intended
+  // to be useful to IDEs, code indexers, documentation generators, and similar
+  // tools.
+  //
+  // For example, say we have a file like:
+  //   message Foo {
+  //     optional string foo = 1;
+  //   }
+  // Let's look at just the field definition:
+  //   optional string foo = 1;
+  //   ^       ^^     ^^  ^  ^^^
+  //   a       bc     de  f  ghi
+  // We have the following locations:
+  //   span   path               represents
+  //   [a,i)  [ 4, 0, 2, 0 ]     The whole field definition.
+  //   [a,b)  [ 4, 0, 2, 0, 4 ]  The label (optional).
+  //   [c,d)  [ 4, 0, 2, 0, 5 ]  The type (string).
+  //   [e,f)  [ 4, 0, 2, 0, 1 ]  The name (foo).
+  //   [g,h)  [ 4, 0, 2, 0, 3 ]  The number (1).
+  //
+  // Notes:
+  // - A location may refer to a repeated field itself (i.e. not to any
+  //   particular index within it).  This is used whenever a set of elements are
+  //   logically enclosed in a single code segment.  For example, an entire
+  //   extend block (possibly containing multiple extension definitions) will
+  //   have an outer location whose path refers to the "extensions" repeated
+  //   field without an index.
+  // - Multiple locations may have the same path.  This happens when a single
+  //   logical declaration is spread out across multiple places.  The most
+  //   obvious example is the "extend" block again -- there may be multiple
+  //   extend blocks in the same scope, each of which will have the same path.
+  // - A location's span is not always a subset of its parent's span.  For
+  //   example, the "extendee" of an extension declaration appears at the
+  //   beginning of the "extend" block and is shared by all extensions within
+  //   the block.
+  // - Just because a location's span is a subset of some other location's span
+  //   does not mean that it is a descendent.  For example, a "group" defines
+  //   both a type and a field in a single declaration.  Thus, the locations
+  //   corresponding to the type and field and their components will overlap.
+  // - Code which tries to interpret locations should probably be designed to
+  //   ignore those that it doesn't understand, as more types of locations could
+  //   be recorded in the future.
+  repeated Location location = 1;
+  message Location {
+    // Identifies which part of the FileDescriptorProto was defined at this
+    // location.
+    //
+    // Each element is a field number or an index.  They form a path from
+    // the root FileDescriptorProto to the place where the definition.  For
+    // example, this path:
+    //   [ 4, 3, 2, 7, 1 ]
+    // refers to:
+    //   file.message_type(3)  // 4, 3
+    //       .field(7)         // 2, 7
+    //       .name()           // 1
+    // This is because FileDescriptorProto.message_type has field number 4:
+    //   repeated DescriptorProto message_type = 4;
+    // and DescriptorProto.field has field number 2:
+    //   repeated FieldDescriptorProto field = 2;
+    // and FieldDescriptorProto.name has field number 1:
+    //   optional string name = 1;
+    //
+    // Thus, the above path gives the location of a field name.  If we removed
+    // the last element:
+    //   [ 4, 3, 2, 7 ]
+    // this path refers to the whole field declaration (from the beginning
+    // of the label to the terminating semicolon).
+    repeated int32 path = 1 [packed=true];
+
+    // Always has exactly three or four elements: start line, start column,
+    // end line (optional, otherwise assumed same as start line), end column.
+    // These are packed into a single field for efficiency.  Note that line
+    // and column numbers are zero-based -- typically you will want to add
+    // 1 to each before displaying to a user.
+    repeated int32 span = 2 [packed=true];
+
+    // If this SourceCodeInfo represents a complete declaration, these are any
+    // comments appearing before and after the declaration which appear to be
+    // attached to the declaration.
+    //
+    // A series of line comments appearing on consecutive lines, with no other
+    // tokens appearing on those lines, will be treated as a single comment.
+    //
+    // leading_detached_comments will keep paragraphs of comments that appear
+    // before (but not connected to) the current element. Each paragraph,
+    // separated by empty lines, will be one comment element in the repeated
+    // field.
+    //
+    // Only the comment content is provided; comment markers (e.g. //) are
+    // stripped out.  For block comments, leading whitespace and an asterisk
+    // will be stripped from the beginning of each line other than the first.
+    // Newlines are included in the output.
+    //
+    // Examples:
+    //
+    //   optional int32 foo = 1;  // Comment attached to foo.
+    //   // Comment attached to bar.
+    //   optional int32 bar = 2;
+    //
+    //   optional string baz = 3;
+    //   // Comment attached to baz.
+    //   // Another line attached to baz.
+    //
+    //   // Comment attached to qux.
+    //   //
+    //   // Another line attached to qux.
+    //   optional double qux = 4;
+    //
+    //   // Detached comment for corge. This is not leading or trailing comments
+    //   // to qux or corge because there are blank lines separating it from
+    //   // both.
+    //
+    //   // Detached comment for corge paragraph 2.
+    //
+    //   optional string corge = 5;
+    //   /* Block comment attached
+    //    * to corge.  Leading asterisks
+    //    * will be removed. */
+    //   /* Block comment attached to
+    //    * grault. */
+    //   optional int32 grault = 6;
+    //
+    //   // ignored detached comments.
+    optional string leading_comments = 3;
+    optional string trailing_comments = 4;
+    repeated string leading_detached_comments = 6;
+  }
+}
+
+// Describes the relationship between generated code and its original source
+// file. A GeneratedCodeInfo message is associated with only one generated
+// source file, but may contain references to different source .proto files.
+message GeneratedCodeInfo {
+  // An Annotation connects some span of text in generated code to an element
+  // of its generating .proto file.
+  repeated Annotation annotation = 1;
+  message Annotation {
+    // Identifies the element in the original source .proto file. This field
+    // is formatted the same as SourceCodeInfo.Location.path.
+    repeated int32 path = 1 [packed=true];
+
+    // Identifies the filesystem path to the original source .proto.
+    optional string source_file = 2;
+
+    // Identifies the starting offset in bytes in the generated code
+    // that relates to the identified object.
+    optional int32 begin = 3;
+
+    // Identifies the ending offset in bytes in the generated code that
+    // relates to the identified offset. The end offset should be one past
+    // the last relevant byte (so the length of the text = end - begin).
+    optional int32 end = 4;
+  }
+}

vendor/google.golang.org/grpc/.travis.yml

@@ -1,20 +1,24 @@
 language: go
 
 go:
+  - 1.6.x
   - 1.7.x
   - 1.8.x
   - 1.9.x
+  - 1.10.x
 
 matrix:
   include:
-  - go: 1.9.x
+  - go: 1.10.x
-    env: ARCH=386
+    env: RUN386=1
 
 go_import_path: google.golang.org/grpc
 
 before_install:
-  - if [[ "$TRAVIS_GO_VERSION" = 1.9* && "$ARCH" != "386" ]]; then ./vet.sh -install || exit 1; fi
+  - if [[ -n "$RUN386" ]]; then export GOARCH=386; fi
+  - if [[ "$TRAVIS_GO_VERSION" = 1.10* && "$GOARCH" != "386" ]]; then ./vet.sh -install || exit 1; fi
 
 script:
-  - if [[ "$TRAVIS_GO_VERSION" = 1.9* && "$ARCH" != "386" ]]; then ./vet.sh || exit 1; fi
+  - if [[ "$TRAVIS_GO_VERSION" = 1.10* && "$GOARCH" != "386" ]]; then ./vet.sh || exit 1; fi
-  - make test testrace
+  - make test || exit 1
+  - if [[ "$GOARCH" != "386" ]]; then make testrace; fi

vendor/google.golang.org/grpc/BUILD

@@ -11,7 +11,9 @@ go_library(
         "clientconn.go",
         "codec.go",
         "doc.go",
-        "grpclb.go",
+        "envconfig.go",
+        "go16.go",
+        "go17.go",
         "interceptor.go",
         "picker_wrapper.go",
         "pickfirst.go",
@@ -19,29 +21,37 @@ go_library(
         "resolver_conn_wrapper.go",
         "rpc_util.go",
         "server.go",
+        "service_config.go",
+        "stickiness_linkedmap.go",
         "stream.go",
         "trace.go",
+        "version.go",
     ],
     importmap = "k8s.io/kubernetes/vendor/google.golang.org/grpc",
     importpath = "google.golang.org/grpc",
     visibility = ["//visibility:public"],
     deps = [
-        "//vendor/github.com/golang/protobuf/proto:go_default_library",
         "//vendor/golang.org/x/net/context:go_default_library",
         "//vendor/golang.org/x/net/http2:go_default_library",
         "//vendor/golang.org/x/net/trace:go_default_library",
         "//vendor/google.golang.org/grpc/balancer:go_default_library",
+        "//vendor/google.golang.org/grpc/balancer/roundrobin:go_default_library",
         "//vendor/google.golang.org/grpc/codes:go_default_library",
         "//vendor/google.golang.org/grpc/connectivity:go_default_library",
         "//vendor/google.golang.org/grpc/credentials:go_default_library",
-        "//vendor/google.golang.org/grpc/grpclb/grpc_lb_v1/messages:go_default_library",
+        "//vendor/google.golang.org/grpc/encoding:go_default_library",
+        "//vendor/google.golang.org/grpc/encoding/proto:go_default_library",
         "//vendor/google.golang.org/grpc/grpclog:go_default_library",
         "//vendor/google.golang.org/grpc/internal:go_default_library",
+        "//vendor/google.golang.org/grpc/internal/backoff:go_default_library",
+        "//vendor/google.golang.org/grpc/internal/channelz:go_default_library",
         "//vendor/google.golang.org/grpc/keepalive:go_default_library",
         "//vendor/google.golang.org/grpc/metadata:go_default_library",
         "//vendor/google.golang.org/grpc/naming:go_default_library",
         "//vendor/google.golang.org/grpc/peer:go_default_library",
         "//vendor/google.golang.org/grpc/resolver:go_default_library",
+        "//vendor/google.golang.org/grpc/resolver/dns:go_default_library",
+        "//vendor/google.golang.org/grpc/resolver/passthrough:go_default_library",
         "//vendor/google.golang.org/grpc/stats:go_default_library",
         "//vendor/google.golang.org/grpc/status:go_default_library",
         "//vendor/google.golang.org/grpc/tap:go_default_library",
@@ -64,6 +74,7 @@ filegroup(
         "//vendor/google.golang.org/grpc/codes:all-srcs",
         "//vendor/google.golang.org/grpc/connectivity:all-srcs",
         "//vendor/google.golang.org/grpc/credentials:all-srcs",
+        "//vendor/google.golang.org/grpc/encoding:all-srcs",
         "//vendor/google.golang.org/grpc/grpclb/grpc_lb_v1/messages:all-srcs",
         "//vendor/google.golang.org/grpc/grpclog:all-srcs",
         "//vendor/google.golang.org/grpc/health:all-srcs",

vendor/google.golang.org/grpc/CONTRIBUTING.md

@@ -7,7 +7,7 @@ If you are new to github, please start by reading [Pull Request howto](https://h
 ## Legal requirements
 
 In order to protect both you and ourselves, you will need to sign the
-[Contributor License Agreement](https://cla.developers.google.com/clas).
+[Contributor License Agreement](https://identity.linuxfoundation.org/projects/cncf).
 
 ## Guidelines for Pull Requests
 How to get your contributions merged smoothly and quickly.
@@ -27,6 +27,10 @@ How to get your contributions merged smoothly and quickly.
 - Keep your PR up to date with upstream/master (if there are merge conflicts, we can't really merge your change).
  
 - **All tests need to be passing** before your change can be merged. We recommend you **run tests locally** before creating your PR to catch breakages early on.
+  - `make all` to test everything, OR
+  - `make vet` to catch vet errors
+  - `make test` to run the tests
+  - `make testrace` to run tests in race mode
 
 - Exceptions to the rules can be made if there's a compelling reason for doing so.
  

vendor/google.golang.org/grpc/Makefile

@@ -1,4 +1,4 @@
-all: test testrace
+all: vet test testrace
 
 deps:
 	go get -d -v google.golang.org/grpc/...
@@ -22,11 +22,14 @@ proto:
 	fi
 	go generate google.golang.org/grpc/...
 
+vet:
+	./vet.sh
+
 test: testdeps
-	go test -cpu 1,4 google.golang.org/grpc/...
+	go test -cpu 1,4 -timeout 5m google.golang.org/grpc/...
 
 testrace: testdeps
-	go test -race -cpu 1,4 google.golang.org/grpc/...
+	go test -race -cpu 1,4 -timeout 7m google.golang.org/grpc/...
 
 clean:
 	go clean -i google.golang.org/grpc/...
@@ -39,7 +42,7 @@ clean:
 	updatetestdeps \
 	build \
 	proto \
+	vet \
 	test \
 	testrace \
-	clean \
+	clean
-	coverage

vendor/google.golang.org/grpc/README.md

@@ -1,6 +1,6 @@
 # gRPC-Go
 
-[![Build Status](https://travis-ci.org/grpc/grpc-go.svg)](https://travis-ci.org/grpc/grpc-go) [![GoDoc](https://godoc.org/google.golang.org/grpc?status.svg)](https://godoc.org/google.golang.org/grpc)
+[![Build Status](https://travis-ci.org/grpc/grpc-go.svg)](https://travis-ci.org/grpc/grpc-go) [![GoDoc](https://godoc.org/google.golang.org/grpc?status.svg)](https://godoc.org/google.golang.org/grpc) [![GoReportCard](https://goreportcard.com/badge/grpc/grpc-go)](https://goreportcard.com/report/github.com/grpc/grpc-go)
 
 The Go implementation of [gRPC](https://grpc.io/): A high performance, open source, general RPC framework that puts mobile and HTTP/2 first. For more information see the [gRPC Quick Start: Go](https://grpc.io/docs/quickstart/go.html) guide.
 
@@ -16,7 +16,7 @@ $ go get -u google.golang.org/grpc
 Prerequisites
 -------------
 
-This requires Go 1.7 or later.
+This requires Go 1.6 or later. Go 1.7 will be required soon.
 
 Constraints
 -----------

vendor/google.golang.org/grpc/backoff.go

@@ -16,83 +16,23 @@
  *
  */
 
+// See internal/backoff package for the backoff implementation. This file is
+// kept for the exported types and API backward compatility.
+
 package grpc
 
 import (
-	"math/rand"
 	"time"
 )
 
 // DefaultBackoffConfig uses values specified for backoff in
 // https://github.com/grpc/grpc/blob/master/doc/connection-backoff.md.
-var (
+var DefaultBackoffConfig = BackoffConfig{
-	DefaultBackoffConfig = BackoffConfig{
 	MaxDelay: 120 * time.Second,
-		baseDelay: 1.0 * time.Second,
-		factor:    1.6,
-		jitter:    0.2,
-	}
-)
-
-// backoffStrategy defines the methodology for backing off after a grpc
-// connection failure.
-//
-// This is unexported until the gRPC project decides whether or not to allow
-// alternative backoff strategies. Once a decision is made, this type and its
-// method may be exported.
-type backoffStrategy interface {
-	// backoff returns the amount of time to wait before the next retry given
-	// the number of consecutive failures.
-	backoff(retries int) time.Duration
 }
 
 // BackoffConfig defines the parameters for the default gRPC backoff strategy.
 type BackoffConfig struct {
 	// MaxDelay is the upper bound of backoff delay.
 	MaxDelay time.Duration
-
-	// TODO(stevvooe): The following fields are not exported, as allowing
-	// changes would violate the current gRPC specification for backoff. If
-	// gRPC decides to allow more interesting backoff strategies, these fields
-	// may be opened up in the future.
-
-	// baseDelay is the amount of time to wait before retrying after the first
-	// failure.
-	baseDelay time.Duration
-
-	// factor is applied to the backoff after each retry.
-	factor float64
-
-	// jitter provides a range to randomize backoff delays.
-	jitter float64
-}
-
-func setDefaults(bc *BackoffConfig) {
-	md := bc.MaxDelay
-	*bc = DefaultBackoffConfig
-
-	if md > 0 {
-		bc.MaxDelay = md
-	}
-}
-
-func (bc BackoffConfig) backoff(retries int) time.Duration {
-	if retries == 0 {
-		return bc.baseDelay
-	}
-	backoff, max := float64(bc.baseDelay), float64(bc.MaxDelay)
-	for backoff < max && retries > 0 {
-		backoff *= bc.factor
-		retries--
-	}
-	if backoff > max {
-		backoff = max
-	}
-	// Randomize backoff delays so that if a cluster of requests start at
-	// the same time, they won't operate in lockstep.
-	backoff *= 1 + bc.jitter*(rand.Float64()*2-1)
-	if backoff < 0 {
-		return 0
-	}
-	return time.Duration(backoff)
 }

vendor/google.golang.org/grpc/balancer.go

@@ -28,10 +28,12 @@ import (
 	"google.golang.org/grpc/credentials"
 	"google.golang.org/grpc/grpclog"
 	"google.golang.org/grpc/naming"
+	"google.golang.org/grpc/status"
 )
 
 // Address represents a server the client connects to.
-// This is the EXPERIMENTAL API and may be changed or extended in the future.
+//
+// Deprecated: please use package balancer.
 type Address struct {
 	// Addr is the server address on which a connection will be established.
 	Addr string
@@ -41,6 +43,8 @@ type Address struct {
 }
 
 // BalancerConfig specifies the configurations for Balancer.
+//
+// Deprecated: please use package balancer.
 type BalancerConfig struct {
 	// DialCreds is the transport credential the Balancer implementation can
 	// use to dial to a remote load balancer server. The Balancer implementations
@@ -53,7 +57,8 @@ type BalancerConfig struct {
 }
 
 // BalancerGetOptions configures a Get call.
-// This is the EXPERIMENTAL API and may be changed or extended in the future.
+//
+// Deprecated: please use package balancer.
 type BalancerGetOptions struct {
 	// BlockingWait specifies whether Get should block when there is no
 	// connected address.
@@ -61,7 +66,8 @@ type BalancerGetOptions struct {
 }
 
 // Balancer chooses network addresses for RPCs.
-// This is the EXPERIMENTAL API and may be changed or extended in the future.
+//
+// Deprecated: please use package balancer.
 type Balancer interface {
 	// Start does the initialization work to bootstrap a Balancer. For example,
 	// this function may start the name resolution and watch the updates. It will
@@ -134,6 +140,8 @@ func downErrorf(timeout, temporary bool, format string, a ...interface{}) downEr
 
 // RoundRobin returns a Balancer that selects addresses round-robin. It uses r to watch
 // the name resolution updates and updates the addresses available correspondingly.
+//
+// Deprecated: please use package balancer/roundrobin.
 func RoundRobin(r naming.Resolver) Balancer {
 	return &roundRobin{r: r}
 }
@@ -310,7 +318,7 @@ func (rr *roundRobin) Get(ctx context.Context, opts BalancerGetOptions) (addr Ad
 	if !opts.BlockingWait {
 		if len(rr.addrs) == 0 {
 			rr.mu.Unlock()
-			err = Errorf(codes.Unavailable, "there is no address available")
+			err = status.Errorf(codes.Unavailable, "there is no address available")
 			return
 		}
 		// Returns the next addr on rr.addrs for failfast RPCs.

vendor/google.golang.org/grpc/balancer/BUILD

@@ -23,7 +23,11 @@ filegroup(
 
 filegroup(
     name = "all-srcs",
-    srcs = [":package-srcs"],
+    srcs = [
+        ":package-srcs",
+        "//vendor/google.golang.org/grpc/balancer/base:all-srcs",
+        "//vendor/google.golang.org/grpc/balancer/roundrobin:all-srcs",
+    ],
     tags = ["automanaged"],
     visibility = ["//visibility:public"],
 )

vendor/google.golang.org/grpc/balancer/balancer.go

@@ -23,6 +23,7 @@ package balancer
 import (
 	"errors"
 	"net"
+	"strings"
 
 	"golang.org/x/net/context"
 	"google.golang.org/grpc/connectivity"
@@ -33,24 +34,26 @@ import (
 var (
 	// m is a map from name to balancer builder.
 	m = make(map[string]Builder)
-	// defaultBuilder is the default balancer to use.
-	defaultBuilder Builder // TODO(bar) install pickfirst as default.
 )
 
-// Register registers the balancer builder to the balancer map.
+// Register registers the balancer builder to the balancer map. b.Name
-// b.Name will be used as the name registered with this builder.
+// (lowercased) will be used as the name registered with this builder.
+//
+// NOTE: this function must only be called during initialization time (i.e. in
+// an init() function), and is not thread-safe. If multiple Balancers are
+// registered with the same name, the one registered last will take effect.
 func Register(b Builder) {
-	m[b.Name()] = b
+	m[strings.ToLower(b.Name())] = b
 }
 
 // Get returns the resolver builder registered with the given name.
-// If no builder is register with the name, the default pickfirst will
+// Note that the compare is done in a case-insenstive fashion.
-// be used.
+// If no builder is register with the name, nil will be returned.
 func Get(name string) Builder {
-	if b, ok := m[name]; ok {
+	if b, ok := m[strings.ToLower(name)]; ok {
 		return b
 	}
-	return defaultBuilder
+	return nil
 }
 
 // SubConn represents a gRPC sub connection.
@@ -66,6 +69,11 @@ func Get(name string) Builder {
 // When the connection encounters an error, it will reconnect immediately.
 // When the connection becomes IDLE, it will not reconnect unless Connect is
 // called.
+//
+// This interface is to be implemented by gRPC. Users should not need a
+// brand new implementation of this interface. For the situations like
+// testing, the new implementation should embed this interface. This allows
+// gRPC to add new methods to this interface.
 type SubConn interface {
 	// UpdateAddresses updates the addresses used in this SubConn.
 	// gRPC checks if currently-connected address is still in the new list.
@@ -83,6 +91,11 @@ type SubConn interface {
 type NewSubConnOptions struct{}
 
 // ClientConn represents a gRPC ClientConn.
+//
+// This interface is to be implemented by gRPC. Users should not need a
+// brand new implementation of this interface. For the situations like
+// testing, the new implementation should embed this interface. This allows
+// gRPC to add new methods to this interface.
 type ClientConn interface {
 	// NewSubConn is called by balancer to create a new SubConn.
 	// It doesn't block and wait for the connections to be established.
@@ -99,6 +112,9 @@ type ClientConn interface {
 	// on the new picker to pick new SubConn.
 	UpdateBalancerState(s connectivity.State, p Picker)
 
+	// ResolveNow is called by balancer to notify gRPC to do a name resolving.
+	ResolveNow(resolver.ResolveNowOption)
+
 	// Target returns the dial target for this ClientConn.
 	Target() string
 }
@@ -113,6 +129,8 @@ type BuildOptions struct {
 	// to a remote load balancer server. The Balancer implementations
 	// can ignore this if it doesn't need to talk to remote balancer.
 	Dialer func(context.Context, string) (net.Conn, error)
+	// ChannelzParentID is the entity parent's channelz unique identification number.
+	ChannelzParentID int64
 }
 
 // Builder creates a balancer.
@@ -131,6 +149,10 @@ type PickOptions struct{}
 type DoneInfo struct {
 	// Err is the rpc error the RPC finished with. It could be nil.
 	Err error
+	// BytesSent indicates if any bytes have been sent to the server.
+	BytesSent bool
+	// BytesReceived indicates if any byte has been received from the server.
+	BytesReceived bool
 }
 
 var (
@@ -143,7 +165,7 @@ var (
 )
 
 // Picker is used by gRPC to pick a SubConn to send an RPC.
-// Balancer is expected to generate a new picker from its snapshot everytime its
+// Balancer is expected to generate a new picker from its snapshot every time its
 // internal state has changed.
 //
 // The pickers used by gRPC can be updated by ClientConn.UpdateBalancerState().
@@ -161,7 +183,7 @@ type Picker interface {
 	// If a SubConn is returned:
 	// - If it is READY, gRPC will send the RPC on it;
 	// - If it is not ready, or becomes not ready after it's returned, gRPC will block
-	//   this call until a new picker is updated and will call pick on the new picker.
+	//   until UpdateBalancerState() is called and will call pick on the new picker.
 	//
 	// If the returned error is not nil:
 	// - If the error is ErrNoSubConnAvailable, gRPC will block until UpdateBalancerState()
@@ -204,3 +226,45 @@ type Balancer interface {
 	// ClientConn.RemoveSubConn for its existing SubConns.
 	Close()
 }
+
+// ConnectivityStateEvaluator takes the connectivity states of multiple SubConns
+// and returns one aggregated connectivity state.
+//
+// It's not thread safe.
+type ConnectivityStateEvaluator struct {
+	numReady            uint64 // Number of addrConns in ready state.
+	numConnecting       uint64 // Number of addrConns in connecting state.
+	numTransientFailure uint64 // Number of addrConns in transientFailure.
+}
+
+// RecordTransition records state change happening in subConn and based on that
+// it evaluates what aggregated state should be.
+//
+//  - If at least one SubConn in Ready, the aggregated state is Ready;
+//  - Else if at least one SubConn in Connecting, the aggregated state is Connecting;
+//  - Else the aggregated state is TransientFailure.
+//
+// Idle and Shutdown are not considered.
+func (cse *ConnectivityStateEvaluator) RecordTransition(oldState, newState connectivity.State) connectivity.State {
+	// Update counters.
+	for idx, state := range []connectivity.State{oldState, newState} {
+		updateVal := 2*uint64(idx) - 1 // -1 for oldState and +1 for new.
+		switch state {
+		case connectivity.Ready:
+			cse.numReady += updateVal
+		case connectivity.Connecting:
+			cse.numConnecting += updateVal
+		case connectivity.TransientFailure:
+			cse.numTransientFailure += updateVal
+		}
+	}
+
+	// Evaluate.
+	if cse.numReady > 0 {
+		return connectivity.Ready
+	}
+	if cse.numConnecting > 0 {
+		return connectivity.Connecting
+	}
+	return connectivity.TransientFailure
+}

vendor/google.golang.org/grpc/balancer/base/BUILD

@@ -0,0 +1,33 @@
+load("@io_bazel_rules_go//go:def.bzl", "go_library")
+
+go_library(
+    name = "go_default_library",
+    srcs = [
+        "balancer.go",
+        "base.go",
+    ],
+    importmap = "k8s.io/kubernetes/vendor/google.golang.org/grpc/balancer/base",
+    importpath = "google.golang.org/grpc/balancer/base",
+    visibility = ["//visibility:public"],
+    deps = [
+        "//vendor/golang.org/x/net/context:go_default_library",
+        "//vendor/google.golang.org/grpc/balancer:go_default_library",
+        "//vendor/google.golang.org/grpc/connectivity:go_default_library",
+        "//vendor/google.golang.org/grpc/grpclog:go_default_library",
+        "//vendor/google.golang.org/grpc/resolver:go_default_library",
+    ],
+)
+
+filegroup(
+    name = "package-srcs",
+    srcs = glob(["**"]),
+    tags = ["automanaged"],
+    visibility = ["//visibility:private"],
+)
+
+filegroup(
+    name = "all-srcs",
+    srcs = [":package-srcs"],
+    tags = ["automanaged"],
+    visibility = ["//visibility:public"],
+)

vendor/google.golang.org/grpc/balancer/base/balancer.go

@@ -0,0 +1,208 @@
+/*
+ *
+ * Copyright 2017 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package base
+
+import (
+	"golang.org/x/net/context"
+	"google.golang.org/grpc/balancer"
+	"google.golang.org/grpc/connectivity"
+	"google.golang.org/grpc/grpclog"
+	"google.golang.org/grpc/resolver"
+)
+
+type baseBuilder struct {
+	name          string
+	pickerBuilder PickerBuilder
+}
+
+func (bb *baseBuilder) Build(cc balancer.ClientConn, opt balancer.BuildOptions) balancer.Balancer {
+	return &baseBalancer{
+		cc:            cc,
+		pickerBuilder: bb.pickerBuilder,
+
+		subConns: make(map[resolver.Address]balancer.SubConn),
+		scStates: make(map[balancer.SubConn]connectivity.State),
+		csEvltr:  &connectivityStateEvaluator{},
+		// Initialize picker to a picker that always return
+		// ErrNoSubConnAvailable, because when state of a SubConn changes, we
+		// may call UpdateBalancerState with this picker.
+		picker: NewErrPicker(balancer.ErrNoSubConnAvailable),
+	}
+}
+
+func (bb *baseBuilder) Name() string {
+	return bb.name
+}
+
+type baseBalancer struct {
+	cc            balancer.ClientConn
+	pickerBuilder PickerBuilder
+
+	csEvltr *connectivityStateEvaluator
+	state   connectivity.State
+
+	subConns map[resolver.Address]balancer.SubConn
+	scStates map[balancer.SubConn]connectivity.State
+	picker   balancer.Picker
+}
+
+func (b *baseBalancer) HandleResolvedAddrs(addrs []resolver.Address, err error) {
+	if err != nil {
+		grpclog.Infof("base.baseBalancer: HandleResolvedAddrs called with error %v", err)
+		return
+	}
+	grpclog.Infoln("base.baseBalancer: got new resolved addresses: ", addrs)
+	// addrsSet is the set converted from addrs, it's used for quick lookup of an address.
+	addrsSet := make(map[resolver.Address]struct{})
+	for _, a := range addrs {
+		addrsSet[a] = struct{}{}
+		if _, ok := b.subConns[a]; !ok {
+			// a is a new address (not existing in b.subConns).
+			sc, err := b.cc.NewSubConn([]resolver.Address{a}, balancer.NewSubConnOptions{})
+			if err != nil {
+				grpclog.Warningf("base.baseBalancer: failed to create new SubConn: %v", err)
+				continue
+			}
+			b.subConns[a] = sc
+			b.scStates[sc] = connectivity.Idle
+			sc.Connect()
+		}
+	}
+	for a, sc := range b.subConns {
+		// a was removed by resolver.
+		if _, ok := addrsSet[a]; !ok {
+			b.cc.RemoveSubConn(sc)
+			delete(b.subConns, a)
+			// Keep the state of this sc in b.scStates until sc's state becomes Shutdown.
+			// The entry will be deleted in HandleSubConnStateChange.
+		}
+	}
+}
+
+// regeneratePicker takes a snapshot of the balancer, and generates a picker
+// from it. The picker is
+//  - errPicker with ErrTransientFailure if the balancer is in TransientFailure,
+//  - built by the pickerBuilder with all READY SubConns otherwise.
+func (b *baseBalancer) regeneratePicker() {
+	if b.state == connectivity.TransientFailure {
+		b.picker = NewErrPicker(balancer.ErrTransientFailure)
+		return
+	}
+	readySCs := make(map[resolver.Address]balancer.SubConn)
+
+	// Filter out all ready SCs from full subConn map.
+	for addr, sc := range b.subConns {
+		if st, ok := b.scStates[sc]; ok && st == connectivity.Ready {
+			readySCs[addr] = sc
+		}
+	}
+	b.picker = b.pickerBuilder.Build(readySCs)
+}
+
+func (b *baseBalancer) HandleSubConnStateChange(sc balancer.SubConn, s connectivity.State) {
+	grpclog.Infof("base.baseBalancer: handle SubConn state change: %p, %v", sc, s)
+	oldS, ok := b.scStates[sc]
+	if !ok {
+		grpclog.Infof("base.baseBalancer: got state changes for an unknown SubConn: %p, %v", sc, s)
+		return
+	}
+	b.scStates[sc] = s
+	switch s {
+	case connectivity.Idle:
+		sc.Connect()
+	case connectivity.Shutdown:
+		// When an address was removed by resolver, b called RemoveSubConn but
+		// kept the sc's state in scStates. Remove state for this sc here.
+		delete(b.scStates, sc)
+	}
+
+	oldAggrState := b.state
+	b.state = b.csEvltr.recordTransition(oldS, s)
+
+	// Regenerate picker when one of the following happens:
+	//  - this sc became ready from not-ready
+	//  - this sc became not-ready from ready
+	//  - the aggregated state of balancer became TransientFailure from non-TransientFailure
+	//  - the aggregated state of balancer became non-TransientFailure from TransientFailure
+	if (s == connectivity.Ready) != (oldS == connectivity.Ready) ||
+		(b.state == connectivity.TransientFailure) != (oldAggrState == connectivity.TransientFailure) {
+		b.regeneratePicker()
+	}
+
+	b.cc.UpdateBalancerState(b.state, b.picker)
+}
+
+// Close is a nop because base balancer doesn't have internal state to clean up,
+// and it doesn't need to call RemoveSubConn for the SubConns.
+func (b *baseBalancer) Close() {
+}
+
+// NewErrPicker returns a picker that always returns err on Pick().
+func NewErrPicker(err error) balancer.Picker {
+	return &errPicker{err: err}
+}
+
+type errPicker struct {
+	err error // Pick() always returns this err.
+}
+
+func (p *errPicker) Pick(ctx context.Context, opts balancer.PickOptions) (balancer.SubConn, func(balancer.DoneInfo), error) {
+	return nil, nil, p.err
+}
+
+// connectivityStateEvaluator gets updated by addrConns when their
+// states transition, based on which it evaluates the state of
+// ClientConn.
+type connectivityStateEvaluator struct {
+	numReady            uint64 // Number of addrConns in ready state.
+	numConnecting       uint64 // Number of addrConns in connecting state.
+	numTransientFailure uint64 // Number of addrConns in transientFailure.
+}
+
+// recordTransition records state change happening in every subConn and based on
+// that it evaluates what aggregated state should be.
+// It can only transition between Ready, Connecting and TransientFailure. Other states,
+// Idle and Shutdown are transitioned into by ClientConn; in the beginning of the connection
+// before any subConn is created ClientConn is in idle state. In the end when ClientConn
+// closes it is in Shutdown state.
+//
+// recordTransition should only be called synchronously from the same goroutine.
+func (cse *connectivityStateEvaluator) recordTransition(oldState, newState connectivity.State) connectivity.State {
+	// Update counters.
+	for idx, state := range []connectivity.State{oldState, newState} {
+		updateVal := 2*uint64(idx) - 1 // -1 for oldState and +1 for new.
+		switch state {
+		case connectivity.Ready:
+			cse.numReady += updateVal
+		case connectivity.Connecting:
+			cse.numConnecting += updateVal
+		case connectivity.TransientFailure:
+			cse.numTransientFailure += updateVal
+		}
+	}
+
+	// Evaluate.
+	if cse.numReady > 0 {
+		return connectivity.Ready
+	}
+	if cse.numConnecting > 0 {
+		return connectivity.Connecting
+	}
+	return connectivity.TransientFailure
+}

vendor/google.golang.org/grpc/balancer/base/base.go

@@ -0,0 +1,52 @@
+/*
+ *
+ * Copyright 2017 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+// Package base defines a balancer base that can be used to build balancers with
+// different picking algorithms.
+//
+// The base balancer creates a new SubConn for each resolved address. The
+// provided picker will only be notified about READY SubConns.
+//
+// This package is the base of round_robin balancer, its purpose is to be used
+// to build round_robin like balancers with complex picking algorithms.
+// Balancers with more complicated logic should try to implement a balancer
+// builder from scratch.
+//
+// All APIs in this package are experimental.
+package base
+
+import (
+	"google.golang.org/grpc/balancer"
+	"google.golang.org/grpc/resolver"
+)
+
+// PickerBuilder creates balancer.Picker.
+type PickerBuilder interface {
+	// Build takes a slice of ready SubConns, and returns a picker that will be
+	// used by gRPC to pick a SubConn.
+	Build(readySCs map[resolver.Address]balancer.SubConn) balancer.Picker
+}
+
+// NewBalancerBuilder returns a balancer builder. The balancers
+// built by this builder will use the picker builder to build pickers.
+func NewBalancerBuilder(name string, pb PickerBuilder) balancer.Builder {
+	return &baseBuilder{
+		name:          name,
+		pickerBuilder: pb,
+	}
+}

vendor/google.golang.org/grpc/balancer/roundrobin/BUILD

@@ -0,0 +1,30 @@
+load("@io_bazel_rules_go//go:def.bzl", "go_library")
+
+go_library(
+    name = "go_default_library",
+    srcs = ["roundrobin.go"],
+    importmap = "k8s.io/kubernetes/vendor/google.golang.org/grpc/balancer/roundrobin",
+    importpath = "google.golang.org/grpc/balancer/roundrobin",
+    visibility = ["//visibility:public"],
+    deps = [
+        "//vendor/golang.org/x/net/context:go_default_library",
+        "//vendor/google.golang.org/grpc/balancer:go_default_library",
+        "//vendor/google.golang.org/grpc/balancer/base:go_default_library",
+        "//vendor/google.golang.org/grpc/grpclog:go_default_library",
+        "//vendor/google.golang.org/grpc/resolver:go_default_library",
+    ],
+)
+
+filegroup(
+    name = "package-srcs",
+    srcs = glob(["**"]),
+    tags = ["automanaged"],
+    visibility = ["//visibility:private"],
+)
+
+filegroup(
+    name = "all-srcs",
+    srcs = [":package-srcs"],
+    tags = ["automanaged"],
+    visibility = ["//visibility:public"],
+)

vendor/google.golang.org/grpc/balancer/roundrobin/roundrobin.go

@@ -0,0 +1,79 @@
+/*
+ *
+ * Copyright 2017 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+// Package roundrobin defines a roundrobin balancer. Roundrobin balancer is
+// installed as one of the default balancers in gRPC, users don't need to
+// explicitly install this balancer.
+package roundrobin
+
+import (
+	"sync"
+
+	"golang.org/x/net/context"
+	"google.golang.org/grpc/balancer"
+	"google.golang.org/grpc/balancer/base"
+	"google.golang.org/grpc/grpclog"
+	"google.golang.org/grpc/resolver"
+)
+
+// Name is the name of round_robin balancer.
+const Name = "round_robin"
+
+// newBuilder creates a new roundrobin balancer builder.
+func newBuilder() balancer.Builder {
+	return base.NewBalancerBuilder(Name, &rrPickerBuilder{})
+}
+
+func init() {
+	balancer.Register(newBuilder())
+}
+
+type rrPickerBuilder struct{}
+
+func (*rrPickerBuilder) Build(readySCs map[resolver.Address]balancer.SubConn) balancer.Picker {
+	grpclog.Infof("roundrobinPicker: newPicker called with readySCs: %v", readySCs)
+	var scs []balancer.SubConn
+	for _, sc := range readySCs {
+		scs = append(scs, sc)
+	}
+	return &rrPicker{
+		subConns: scs,
+	}
+}
+
+type rrPicker struct {
+	// subConns is the snapshot of the roundrobin balancer when this picker was
+	// created. The slice is immutable. Each Get() will do a round robin
+	// selection from it and return the selected SubConn.
+	subConns []balancer.SubConn
+
+	mu   sync.Mutex
+	next int
+}
+
+func (p *rrPicker) Pick(ctx context.Context, opts balancer.PickOptions) (balancer.SubConn, func(balancer.DoneInfo), error) {
+	if len(p.subConns) <= 0 {
+		return nil, nil, balancer.ErrNoSubConnAvailable
+	}
+
+	p.mu.Lock()
+	sc := p.subConns[p.next]
+	p.next = (p.next + 1) % len(p.subConns)
+	p.mu.Unlock()
+	return sc, nil, nil
+}

vendor/google.golang.org/grpc/balancer_conn_wrappers.go

@@ -19,6 +19,7 @@
 package grpc
 
 import (
+	"fmt"
 	"sync"
 
 	"google.golang.org/grpc/balancer"
@@ -73,7 +74,7 @@ func (b *scStateUpdateBuffer) load() {
 	}
 }
 
-// get returns the channel that receives a recvMsg in the buffer.
+// get returns the channel that the scStateUpdate will be sent to.
 //
 // Upon receiving, the caller should call load to send another
 // scStateChangeTuple onto the channel if there is any.
@@ -96,6 +97,9 @@ type ccBalancerWrapper struct {
 	stateChangeQueue *scStateUpdateBuffer
 	resolverUpdateCh chan *resolverUpdate
 	done             chan struct{}
+
+	mu       sync.Mutex
+	subConns map[*acBalancerWrapper]struct{}
 }
 
 func newCCBalancerWrapper(cc *ClientConn, b balancer.Builder, bopts balancer.BuildOptions) *ccBalancerWrapper {
@@ -104,21 +108,34 @@ func newCCBalancerWrapper(cc *ClientConn, b balancer.Builder, bopts balancer.Bui
 		stateChangeQueue: newSCStateUpdateBuffer(),
 		resolverUpdateCh: make(chan *resolverUpdate, 1),
 		done:             make(chan struct{}),
+		subConns:         make(map[*acBalancerWrapper]struct{}),
 	}
 	go ccb.watcher()
 	ccb.balancer = b.Build(ccb, bopts)
 	return ccb
 }
 
-// watcher balancer functions sequencially, so the balancer can be implemeneted
+// watcher balancer functions sequentially, so the balancer can be implemented
 // lock-free.
 func (ccb *ccBalancerWrapper) watcher() {
 	for {
 		select {
 		case t := <-ccb.stateChangeQueue.get():
 			ccb.stateChangeQueue.load()
+			select {
+			case <-ccb.done:
+				ccb.balancer.Close()
+				return
+			default:
+			}
 			ccb.balancer.HandleSubConnStateChange(t.sc, t.state)
 		case t := <-ccb.resolverUpdateCh:
+			select {
+			case <-ccb.done:
+				ccb.balancer.Close()
+				return
+			default:
+			}
 			ccb.balancer.HandleResolvedAddrs(t.addrs, t.err)
 		case <-ccb.done:
 		}
@@ -126,6 +143,13 @@ func (ccb *ccBalancerWrapper) watcher() {
 		select {
 		case <-ccb.done:
 			ccb.balancer.Close()
+			ccb.mu.Lock()
+			scs := ccb.subConns
+			ccb.subConns = nil
+			ccb.mu.Unlock()
+			for acbw := range scs {
+				ccb.cc.removeAddrConn(acbw.getAddrConn(), errConnDrain)
+			}
 			return
 		default:
 		}
@@ -165,33 +189,54 @@ func (ccb *ccBalancerWrapper) handleResolvedAddrs(addrs []resolver.Address, err
 }
 
 func (ccb *ccBalancerWrapper) NewSubConn(addrs []resolver.Address, opts balancer.NewSubConnOptions) (balancer.SubConn, error) {
-	grpclog.Infof("ccBalancerWrapper: new subconn: %v", addrs)
+	if len(addrs) <= 0 {
+		return nil, fmt.Errorf("grpc: cannot create SubConn with empty address list")
+	}
+	ccb.mu.Lock()
+	defer ccb.mu.Unlock()
+	if ccb.subConns == nil {
+		return nil, fmt.Errorf("grpc: ClientConn balancer wrapper was closed")
+	}
 	ac, err := ccb.cc.newAddrConn(addrs)
 	if err != nil {
 		return nil, err
 	}
 	acbw := &acBalancerWrapper{ac: ac}
-	ac.mu.Lock()
+	acbw.ac.mu.Lock()
 	ac.acbw = acbw
-	ac.mu.Unlock()
+	acbw.ac.mu.Unlock()
+	ccb.subConns[acbw] = struct{}{}
 	return acbw, nil
 }
 
 func (ccb *ccBalancerWrapper) RemoveSubConn(sc balancer.SubConn) {
-	grpclog.Infof("ccBalancerWrapper: removing subconn")
 	acbw, ok := sc.(*acBalancerWrapper)
 	if !ok {
 		return
 	}
+	ccb.mu.Lock()
+	defer ccb.mu.Unlock()
+	if ccb.subConns == nil {
+		return
+	}
+	delete(ccb.subConns, acbw)
 	ccb.cc.removeAddrConn(acbw.getAddrConn(), errConnDrain)
 }
 
 func (ccb *ccBalancerWrapper) UpdateBalancerState(s connectivity.State, p balancer.Picker) {
-	grpclog.Infof("ccBalancerWrapper: updating state and picker called by balancer: %v, %p", s, p)
+	ccb.mu.Lock()
+	defer ccb.mu.Unlock()
+	if ccb.subConns == nil {
+		return
+	}
 	ccb.cc.csMgr.updateState(s)
 	ccb.cc.blockingpicker.updatePicker(p)
 }
 
+func (ccb *ccBalancerWrapper) ResolveNow(o resolver.ResolveNowOption) {
+	ccb.cc.resolveNow(o)
+}
+
 func (ccb *ccBalancerWrapper) Target() string {
 	return ccb.cc.target
 }
@@ -204,9 +249,12 @@ type acBalancerWrapper struct {
 }
 
 func (acbw *acBalancerWrapper) UpdateAddresses(addrs []resolver.Address) {
-	grpclog.Infof("acBalancerWrapper: UpdateAddresses called with %v", addrs)
 	acbw.mu.Lock()
 	defer acbw.mu.Unlock()
+	if len(addrs) <= 0 {
+		acbw.ac.tearDown(errConnDrain)
+		return
+	}
 	if !acbw.ac.tryUpdateAddrs(addrs) {
 		cc := acbw.ac.cc
 		acbw.ac.mu.Lock()
@@ -234,7 +282,7 @@ func (acbw *acBalancerWrapper) UpdateAddresses(addrs []resolver.Address) {
 		ac.acbw = acbw
 		ac.mu.Unlock()
 		if acState != connectivity.Idle {
-			ac.connect(false)
+			ac.connect()
 		}
 	}
 }
@@ -242,7 +290,7 @@ func (acbw *acBalancerWrapper) UpdateAddresses(addrs []resolver.Address) {
 func (acbw *acBalancerWrapper) Connect() {
 	acbw.mu.Lock()
 	defer acbw.mu.Unlock()
-	acbw.ac.connect(false)
+	acbw.ac.connect()
 }
 
 func (acbw *acBalancerWrapper) getAddrConn() *addrConn {

vendor/google.golang.org/grpc/balancer_v1_wrapper.go

@@ -19,6 +19,7 @@
 package grpc
 
 import (
+	"strings"
 	"sync"
 
 	"golang.org/x/net/context"
@@ -27,6 +28,7 @@ import (
 	"google.golang.org/grpc/connectivity"
 	"google.golang.org/grpc/grpclog"
 	"google.golang.org/grpc/resolver"
+	"google.golang.org/grpc/status"
 )
 
 type balancerWrapperBuilder struct {
@@ -34,7 +36,13 @@ type balancerWrapperBuilder struct {
 }
 
 func (bwb *balancerWrapperBuilder) Build(cc balancer.ClientConn, opts balancer.BuildOptions) balancer.Balancer {
-	bwb.b.Start(cc.Target(), BalancerConfig{
+	targetAddr := cc.Target()
+	targetSplitted := strings.Split(targetAddr, ":///")
+	if len(targetSplitted) >= 2 {
+		targetAddr = targetSplitted[1]
+	}
+
+	bwb.b.Start(targetAddr, BalancerConfig{
 		DialCreds: opts.DialCreds,
 		Dialer:    opts.Dialer,
 	})
@@ -43,10 +51,11 @@ func (bwb *balancerWrapperBuilder) Build(cc balancer.ClientConn, opts balancer.B
 		balancer:   bwb.b,
 		pickfirst:  pickfirst,
 		cc:         cc,
+		targetAddr: targetAddr,
 		startCh:    make(chan struct{}),
 		conns:      make(map[resolver.Address]balancer.SubConn),
 		connSt:     make(map[balancer.SubConn]*scState),
-		csEvltr:   &connectivityStateEvaluator{},
+		csEvltr:    &balancer.ConnectivityStateEvaluator{},
 		state:      connectivity.Idle,
 	}
 	cc.UpdateBalancerState(connectivity.Idle, bw)
@@ -69,10 +78,7 @@ type balancerWrapper struct {
 	pickfirst bool
 
 	cc         balancer.ClientConn
-
+	targetAddr string // Target without the scheme.
-	// To aggregate the connectivity state.
-	csEvltr *connectivityStateEvaluator
-	state   connectivity.State
 
 	mu     sync.Mutex
 	conns  map[resolver.Address]balancer.SubConn
@@ -82,18 +88,21 @@ type balancerWrapper struct {
 	// - NewSubConn is created, cc wants to notify balancer of state changes;
 	// - Build hasn't return, cc doesn't have access to balancer.
 	startCh chan struct{}
+
+	// To aggregate the connectivity state.
+	csEvltr *balancer.ConnectivityStateEvaluator
+	state   connectivity.State
 }
 
 // lbWatcher watches the Notify channel of the balancer and manages
 // connections accordingly.
 func (bw *balancerWrapper) lbWatcher() {
 	<-bw.startCh
-	grpclog.Infof("balancerWrapper: is pickfirst: %v\n", bw.pickfirst)
 	notifyCh := bw.balancer.Notify()
 	if notifyCh == nil {
 		// There's no resolver in the balancer. Connect directly.
 		a := resolver.Address{
-			Addr: bw.cc.Target(),
+			Addr: bw.targetAddr,
 			Type: resolver.Backend,
 		}
 		sc, err := bw.cc.NewSubConn([]resolver.Address{a}, balancer.NewSubConnOptions{})
@@ -103,7 +112,7 @@ func (bw *balancerWrapper) lbWatcher() {
 			bw.mu.Lock()
 			bw.conns[a] = sc
 			bw.connSt[sc] = &scState{
-				addr: Address{Addr: bw.cc.Target()},
+				addr: Address{Addr: bw.targetAddr},
 				s:    connectivity.Idle,
 			}
 			bw.mu.Unlock()
@@ -165,10 +174,10 @@ func (bw *balancerWrapper) lbWatcher() {
 					sc.Connect()
 				}
 			} else {
-				oldSC.UpdateAddresses(newAddrs)
 				bw.mu.Lock()
 				bw.connSt[oldSC].addr = addrs[0]
 				bw.mu.Unlock()
+				oldSC.UpdateAddresses(newAddrs)
 			}
 		} else {
 			var (
@@ -221,7 +230,6 @@ func (bw *balancerWrapper) lbWatcher() {
 }
 
 func (bw *balancerWrapper) HandleSubConnStateChange(sc balancer.SubConn, s connectivity.State) {
-	grpclog.Infof("balancerWrapper: handle subconn state change: %p, %v", sc, s)
 	bw.mu.Lock()
 	defer bw.mu.Unlock()
 	scSt, ok := bw.connSt[sc]
@@ -240,7 +248,7 @@ func (bw *balancerWrapper) HandleSubConnStateChange(sc balancer.SubConn, s conne
 			scSt.down(errConnClosing)
 		}
 	}
-	sa := bw.csEvltr.recordTransition(oldS, s)
+	sa := bw.csEvltr.RecordTransition(oldS, s)
 	if bw.state != sa {
 		bw.state = sa
 	}
@@ -249,7 +257,6 @@ func (bw *balancerWrapper) HandleSubConnStateChange(sc balancer.SubConn, s conne
 		// Remove state for this sc.
 		delete(bw.connSt, sc)
 	}
-	return
 }
 
 func (bw *balancerWrapper) HandleResolvedAddrs([]resolver.Address, error) {
@@ -262,7 +269,6 @@ func (bw *balancerWrapper) HandleResolvedAddrs([]resolver.Address, error) {
 	}
 	// There should be a resolver inside the balancer.
 	// All updates here, if any, are ignored.
-	return
 }
 
 func (bw *balancerWrapper) Close() {
@@ -274,7 +280,6 @@ func (bw *balancerWrapper) Close() {
 		close(bw.startCh)
 	}
 	bw.balancer.Close()
-	return
 }
 
 // The picker is the balancerWrapper itself.
@@ -310,58 +315,14 @@ func (bw *balancerWrapper) Pick(ctx context.Context, opts balancer.PickOptions)
 			Metadata:   a.Metadata,
 		}]
 		if !ok && failfast {
-			return nil, nil, Errorf(codes.Unavailable, "there is no connection available")
+			return nil, nil, status.Errorf(codes.Unavailable, "there is no connection available")
 		}
 		if s, ok := bw.connSt[sc]; failfast && (!ok || s.s != connectivity.Ready) {
 			// If the returned sc is not ready and RPC is failfast,
 			// return error, and this RPC will fail.
-			return nil, nil, Errorf(codes.Unavailable, "there is no connection available")
+			return nil, nil, status.Errorf(codes.Unavailable, "there is no connection available")
 		}
 	}
 
 	return sc, done, nil
 }
-
-// connectivityStateEvaluator gets updated by addrConns when their
-// states transition, based on which it evaluates the state of
-// ClientConn.
-type connectivityStateEvaluator struct {
-	mu                  sync.Mutex
-	numReady            uint64 // Number of addrConns in ready state.
-	numConnecting       uint64 // Number of addrConns in connecting state.
-	numTransientFailure uint64 // Number of addrConns in transientFailure.
-}
-
-// recordTransition records state change happening in every subConn and based on
-// that it evaluates what aggregated state should be.
-// It can only transition between Ready, Connecting and TransientFailure. Other states,
-// Idle and Shutdown are transitioned into by ClientConn; in the beginning of the connection
-// before any subConn is created ClientConn is in idle state. In the end when ClientConn
-// closes it is in Shutdown state.
-// TODO Note that in later releases, a ClientConn with no activity will be put into an Idle state.
-func (cse *connectivityStateEvaluator) recordTransition(oldState, newState connectivity.State) connectivity.State {
-	cse.mu.Lock()
-	defer cse.mu.Unlock()
-
-	// Update counters.
-	for idx, state := range []connectivity.State{oldState, newState} {
-		updateVal := 2*uint64(idx) - 1 // -1 for oldState and +1 for new.
-		switch state {
-		case connectivity.Ready:
-			cse.numReady += updateVal
-		case connectivity.Connecting:
-			cse.numConnecting += updateVal
-		case connectivity.TransientFailure:
-			cse.numTransientFailure += updateVal
-		}
-	}
-
-	// Evaluate.
-	if cse.numReady > 0 {
-		return connectivity.Ready
-	}
-	if cse.numConnecting > 0 {
-		return connectivity.Connecting
-	}
-	return connectivity.TransientFailure
-}

vendor/google.golang.org/grpc/call.go

@@ -19,289 +19,75 @@
 package grpc
 
 import (
-	"bytes"
-	"io"
-	"time"
-
 	"golang.org/x/net/context"
-	"golang.org/x/net/trace"
-	"google.golang.org/grpc/balancer"
-	"google.golang.org/grpc/codes"
-	"google.golang.org/grpc/peer"
-	"google.golang.org/grpc/stats"
-	"google.golang.org/grpc/status"
-	"google.golang.org/grpc/transport"
 )
 
-// recvResponse receives and parses an RPC response.
+// Invoke sends the RPC request on the wire and returns after response is
-// On error, it returns the error and indicates whether the call should be retried.
+// received.  This is typically called by generated code.
 //
-// TODO(zhaoq): Check whether the received message sequence is valid.
+// All errors returned by Invoke are compatible with the status package.
-// TODO ctx is used for stats collection and processing. It is the context passed from the application.
+func (cc *ClientConn) Invoke(ctx context.Context, method string, args, reply interface{}, opts ...CallOption) error {
-func recvResponse(ctx context.Context, dopts dialOptions, t transport.ClientTransport, c *callInfo, stream *transport.Stream, reply interface{}) (err error) {
+	// allow interceptor to see all applicable call options, which means those
-	// Try to acquire header metadata from the server if there is any.
+	// configured as defaults from dial option as well as per-call options
-	defer func() {
+	opts = combine(cc.dopts.callOptions, opts)
-		if err != nil {
-			if _, ok := err.(transport.ConnectionError); !ok {
-				t.CloseStream(stream, err)
-			}
-		}
-	}()
-	c.headerMD, err = stream.Header()
-	if err != nil {
-		return
-	}
-	p := &parser{r: stream}
-	var inPayload *stats.InPayload
-	if dopts.copts.StatsHandler != nil {
-		inPayload = &stats.InPayload{
-			Client: true,
-		}
-	}
-	for {
-		if c.maxReceiveMessageSize == nil {
-			return Errorf(codes.Internal, "callInfo maxReceiveMessageSize field uninitialized(nil)")
-		}
-		if err = recv(p, dopts.codec, stream, dopts.dc, reply, *c.maxReceiveMessageSize, inPayload); err != nil {
-			if err == io.EOF {
-				break
-			}
-			return
-		}
-	}
-	if inPayload != nil && err == io.EOF && stream.Status().Code() == codes.OK {
-		// TODO in the current implementation, inTrailer may be handled before inPayload in some cases.
-		// Fix the order if necessary.
-		dopts.copts.StatsHandler.HandleRPC(ctx, inPayload)
-	}
-	c.trailerMD = stream.Trailer()
-	return nil
-}
 
-// sendRequest writes out various information of an RPC such as Context and Message.
-func sendRequest(ctx context.Context, dopts dialOptions, compressor Compressor, c *callInfo, callHdr *transport.CallHdr, stream *transport.Stream, t transport.ClientTransport, args interface{}, opts *transport.Options) (err error) {
-	defer func() {
-		if err != nil {
-			// If err is connection error, t will be closed, no need to close stream here.
-			if _, ok := err.(transport.ConnectionError); !ok {
-				t.CloseStream(stream, err)
-			}
-		}
-	}()
-	var (
-		cbuf       *bytes.Buffer
-		outPayload *stats.OutPayload
-	)
-	if compressor != nil {
-		cbuf = new(bytes.Buffer)
-	}
-	if dopts.copts.StatsHandler != nil {
-		outPayload = &stats.OutPayload{
-			Client: true,
-		}
-	}
-	hdr, data, err := encode(dopts.codec, args, compressor, cbuf, outPayload)
-	if err != nil {
-		return err
-	}
-	if c.maxSendMessageSize == nil {
-		return Errorf(codes.Internal, "callInfo maxSendMessageSize field uninitialized(nil)")
-	}
-	if len(data) > *c.maxSendMessageSize {
-		return Errorf(codes.ResourceExhausted, "grpc: trying to send message larger than max (%d vs. %d)", len(data), *c.maxSendMessageSize)
-	}
-	err = t.Write(stream, hdr, data, opts)
-	if err == nil && outPayload != nil {
-		outPayload.SentTime = time.Now()
-		dopts.copts.StatsHandler.HandleRPC(ctx, outPayload)
-	}
-	// t.NewStream(...) could lead to an early rejection of the RPC (e.g., the service/method
-	// does not exist.) so that t.Write could get io.EOF from wait(...). Leave the following
-	// recvResponse to get the final status.
-	if err != nil && err != io.EOF {
-		return err
-	}
-	// Sent successfully.
-	return nil
-}
-
-// Invoke sends the RPC request on the wire and returns after response is received.
-// Invoke is called by generated code. Also users can call Invoke directly when it
-// is really needed in their use cases.
-func Invoke(ctx context.Context, method string, args, reply interface{}, cc *ClientConn, opts ...CallOption) error {
 	if cc.dopts.unaryInt != nil {
 		return cc.dopts.unaryInt(ctx, method, args, reply, cc, invoke, opts...)
 	}
 	return invoke(ctx, method, args, reply, cc, opts...)
 }
 
-func invoke(ctx context.Context, method string, args, reply interface{}, cc *ClientConn, opts ...CallOption) (e error) {
+func combine(o1 []CallOption, o2 []CallOption) []CallOption {
-	c := defaultCallInfo()
+	// we don't use append because o1 could have extra capacity whose
-	mc := cc.GetMethodConfig(method)
+	// elements would be overwritten, which could cause inadvertent
-	if mc.WaitForReady != nil {
+	// sharing (and race connditions) between concurrent calls
-		c.failFast = !*mc.WaitForReady
+	if len(o1) == 0 {
+		return o2
+	} else if len(o2) == 0 {
+		return o1
 	}
+	ret := make([]CallOption, len(o1)+len(o2))
+	copy(ret, o1)
+	copy(ret[len(o1):], o2)
+	return ret
+}
 
-	if mc.Timeout != nil && *mc.Timeout >= 0 {
+// Invoke sends the RPC request on the wire and returns after response is
-		var cancel context.CancelFunc
+// received.  This is typically called by generated code.
-		ctx, cancel = context.WithTimeout(ctx, *mc.Timeout)
+//
-		defer cancel()
+// DEPRECATED: Use ClientConn.Invoke instead.
-	}
+func Invoke(ctx context.Context, method string, args, reply interface{}, cc *ClientConn, opts ...CallOption) error {
+	return cc.Invoke(ctx, method, args, reply, opts...)
+}
 
-	opts = append(cc.dopts.callOptions, opts...)
+var unaryStreamDesc = &StreamDesc{ServerStreams: false, ClientStreams: false}
-	for _, o := range opts {
-		if err := o.before(c); err != nil {
-			return toRPCErr(err)
-		}
-	}
-	defer func() {
-		for _, o := range opts {
-			o.after(c)
-		}
-	}()
 
-	c.maxSendMessageSize = getMaxSize(mc.MaxReqSize, c.maxSendMessageSize, defaultClientMaxSendMessageSize)
+func invoke(ctx context.Context, method string, req, reply interface{}, cc *ClientConn, opts ...CallOption) error {
-	c.maxReceiveMessageSize = getMaxSize(mc.MaxRespSize, c.maxReceiveMessageSize, defaultClientMaxReceiveMessageSize)
+	// TODO: implement retries in clientStream and make this simply
-
+	// newClientStream, SendMsg, RecvMsg.
-	if EnableTracing {
+	firstAttempt := true
-		c.traceInfo.tr = trace.New("grpc.Sent."+methodFamily(method), method)
-		defer c.traceInfo.tr.Finish()
-		c.traceInfo.firstLine.client = true
-		if deadline, ok := ctx.Deadline(); ok {
-			c.traceInfo.firstLine.deadline = deadline.Sub(time.Now())
-		}
-		c.traceInfo.tr.LazyLog(&c.traceInfo.firstLine, false)
-		// TODO(dsymonds): Arrange for c.traceInfo.firstLine.remoteAddr to be set.
-		defer func() {
-			if e != nil {
-				c.traceInfo.tr.LazyLog(&fmtStringer{"%v", []interface{}{e}}, true)
-				c.traceInfo.tr.SetError()
-			}
-		}()
-	}
-	ctx = newContextWithRPCInfo(ctx, c.failFast)
-	sh := cc.dopts.copts.StatsHandler
-	if sh != nil {
-		ctx = sh.TagRPC(ctx, &stats.RPCTagInfo{FullMethodName: method, FailFast: c.failFast})
-		begin := &stats.Begin{
-			Client:    true,
-			BeginTime: time.Now(),
-			FailFast:  c.failFast,
-		}
-		sh.HandleRPC(ctx, begin)
-		defer func() {
-			end := &stats.End{
-				Client:  true,
-				EndTime: time.Now(),
-				Error:   e,
-			}
-			sh.HandleRPC(ctx, end)
-		}()
-	}
-	topts := &transport.Options{
-		Last:  true,
-		Delay: false,
-	}
 	for {
-		var (
+		csInt, err := newClientStream(ctx, unaryStreamDesc, cc, method, opts...)
-			err    error
-			t      transport.ClientTransport
-			stream *transport.Stream
-			// Record the done handler from Balancer.Get(...). It is called once the
-			// RPC has completed or failed.
-			done func(balancer.DoneInfo)
-		)
-		// TODO(zhaoq): Need a formal spec of fail-fast.
-		callHdr := &transport.CallHdr{
-			Host:   cc.authority,
-			Method: method,
-		}
-		if cc.dopts.cp != nil {
-			callHdr.SendCompress = cc.dopts.cp.Type()
-		}
-		if c.creds != nil {
-			callHdr.Creds = c.creds
-		}
-
-		t, done, err = cc.getTransport(ctx, c.failFast)
 		if err != nil {
-			// TODO(zhaoq): Probably revisit the error handling.
-			if _, ok := status.FromError(err); ok {
 			return err
 		}
-			if err == errConnClosing || err == errConnUnavailable {
+		cs := csInt.(*clientStream)
-				if c.failFast {
+		if err := cs.SendMsg(req); err != nil {
-					return Errorf(codes.Unavailable, "%v", err)
+			if !cs.c.failFast && cs.attempt.s.Unprocessed() && firstAttempt {
-				}
+				// TODO: Add a field to header for grpc-transparent-retry-attempts
+				firstAttempt = false
 				continue
 			}
-			// All the other errors are treated as Internal errors.
+			return err
-			return Errorf(codes.Internal, "%v", err)
 		}
-		if c.traceInfo.tr != nil {
+		if err := cs.RecvMsg(reply); err != nil {
-			c.traceInfo.tr.LazyLog(&payload{sent: true, msg: args}, true)
+			if !cs.c.failFast && cs.attempt.s.Unprocessed() && firstAttempt {
-		}
+				// TODO: Add a field to header for grpc-transparent-retry-attempts
-		stream, err = t.NewStream(ctx, callHdr)
+				firstAttempt = false
-		if err != nil {
-			if done != nil {
-				if _, ok := err.(transport.ConnectionError); ok {
-					// If error is connection error, transport was sending data on wire,
-					// and we are not sure if anything has been sent on wire.
-					// If error is not connection error, we are sure nothing has been sent.
-					updateRPCInfoInContext(ctx, rpcInfo{bytesSent: true, bytesReceived: false})
-				}
-				done(balancer.DoneInfo{Err: err})
-			}
-			if _, ok := err.(transport.ConnectionError); (ok || err == transport.ErrStreamDrain) && !c.failFast {
 				continue
 			}
-			return toRPCErr(err)
+			return err
 		}
-		if peer, ok := peer.FromContext(stream.Context()); ok {
+		return nil
-			c.peer = peer
-		}
-		err = sendRequest(ctx, cc.dopts, cc.dopts.cp, c, callHdr, stream, t, args, topts)
-		if err != nil {
-			if done != nil {
-				updateRPCInfoInContext(ctx, rpcInfo{
-					bytesSent:     stream.BytesSent(),
-					bytesReceived: stream.BytesReceived(),
-				})
-				done(balancer.DoneInfo{Err: err})
-			}
-			// Retry a non-failfast RPC when
-			// i) there is a connection error; or
-			// ii) the server started to drain before this RPC was initiated.
-			if _, ok := err.(transport.ConnectionError); (ok || err == transport.ErrStreamDrain) && !c.failFast {
-				continue
-			}
-			return toRPCErr(err)
-		}
-		err = recvResponse(ctx, cc.dopts, t, c, stream, reply)
-		if err != nil {
-			if done != nil {
-				updateRPCInfoInContext(ctx, rpcInfo{
-					bytesSent:     stream.BytesSent(),
-					bytesReceived: stream.BytesReceived(),
-				})
-				done(balancer.DoneInfo{Err: err})
-			}
-			if _, ok := err.(transport.ConnectionError); (ok || err == transport.ErrStreamDrain) && !c.failFast {
-				continue
-			}
-			return toRPCErr(err)
-		}
-		if c.traceInfo.tr != nil {
-			c.traceInfo.tr.LazyLog(&payload{sent: false, msg: reply}, true)
-		}
-		t.CloseStream(stream, nil)
-		if done != nil {
-			updateRPCInfoInContext(ctx, rpcInfo{
-				bytesSent:     stream.BytesSent(),
-				bytesReceived: stream.BytesReceived(),
-			})
-			done(balancer.DoneInfo{Err: err})
-		}
-		return stream.Status().Err()
 	}
 }

vendor/google.golang.org/grpc/codec.go

@@ -19,86 +19,32 @@
 package grpc
 
 import (
-	"math"
+	"google.golang.org/grpc/encoding"
-	"sync"
+	_ "google.golang.org/grpc/encoding/proto" // to register the Codec for "proto"
-
-	"github.com/golang/protobuf/proto"
 )
 
+// baseCodec contains the functionality of both Codec and encoding.Codec, but
+// omits the name/string, which vary between the two and are not needed for
+// anything besides the registry in the encoding package.
+type baseCodec interface {
+	Marshal(v interface{}) ([]byte, error)
+	Unmarshal(data []byte, v interface{}) error
+}
+
+var _ baseCodec = Codec(nil)
+var _ baseCodec = encoding.Codec(nil)
+
 // Codec defines the interface gRPC uses to encode and decode messages.
 // Note that implementations of this interface must be thread safe;
 // a Codec's methods can be called from concurrent goroutines.
+//
+// Deprecated: use encoding.Codec instead.
 type Codec interface {
 	// Marshal returns the wire format of v.
 	Marshal(v interface{}) ([]byte, error)
 	// Unmarshal parses the wire format into v.
 	Unmarshal(data []byte, v interface{}) error
-	// String returns the name of the Codec implementation. The returned
+	// String returns the name of the Codec implementation.  This is unused by
-	// string will be used as part of content type in transmission.
+	// gRPC.
 	String() string
 }
-
-// protoCodec is a Codec implementation with protobuf. It is the default codec for gRPC.
-type protoCodec struct {
-}
-
-type cachedProtoBuffer struct {
-	lastMarshaledSize uint32
-	proto.Buffer
-}
-
-func capToMaxInt32(val int) uint32 {
-	if val > math.MaxInt32 {
-		return uint32(math.MaxInt32)
-	}
-	return uint32(val)
-}
-
-func (p protoCodec) marshal(v interface{}, cb *cachedProtoBuffer) ([]byte, error) {
-	protoMsg := v.(proto.Message)
-	newSlice := make([]byte, 0, cb.lastMarshaledSize)
-
-	cb.SetBuf(newSlice)
-	cb.Reset()
-	if err := cb.Marshal(protoMsg); err != nil {
-		return nil, err
-	}
-	out := cb.Bytes()
-	cb.lastMarshaledSize = capToMaxInt32(len(out))
-	return out, nil
-}
-
-func (p protoCodec) Marshal(v interface{}) ([]byte, error) {
-	cb := protoBufferPool.Get().(*cachedProtoBuffer)
-	out, err := p.marshal(v, cb)
-
-	// put back buffer and lose the ref to the slice
-	cb.SetBuf(nil)
-	protoBufferPool.Put(cb)
-	return out, err
-}
-
-func (p protoCodec) Unmarshal(data []byte, v interface{}) error {
-	cb := protoBufferPool.Get().(*cachedProtoBuffer)
-	cb.SetBuf(data)
-	v.(proto.Message).Reset()
-	err := cb.Unmarshal(v.(proto.Message))
-	cb.SetBuf(nil)
-	protoBufferPool.Put(cb)
-	return err
-}
-
-func (protoCodec) String() string {
-	return "proto"
-}
-
-var (
-	protoBufferPool = &sync.Pool{
-		New: func() interface{} {
-			return &cachedProtoBuffer{
-				Buffer:            proto.Buffer{},
-				lastMarshaledSize: 16,
-			}
-		},
-	}
-)

vendor/google.golang.org/grpc/codes/code_string.go

@@ -1,16 +1,62 @@
-// Code generated by "stringer -type=Code"; DO NOT EDIT.
+/*
+ *
+ * Copyright 2017 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
 
 package codes
 
-import "fmt"
+import "strconv"
 
-const _Code_name = "OKCanceledUnknownInvalidArgumentDeadlineExceededNotFoundAlreadyExistsPermissionDeniedResourceExhaustedFailedPreconditionAbortedOutOfRangeUnimplementedInternalUnavailableDataLossUnauthenticated"
+func (c Code) String() string {
-
+	switch c {
-var _Code_index = [...]uint8{0, 2, 10, 17, 32, 48, 56, 69, 85, 102, 120, 127, 137, 150, 158, 169, 177, 192}
+	case OK:
-
+		return "OK"
-func (i Code) String() string {
+	case Canceled:
-	if i >= Code(len(_Code_index)-1) {
+		return "Canceled"
-		return fmt.Sprintf("Code(%d)", i)
+	case Unknown:
+		return "Unknown"
+	case InvalidArgument:
+		return "InvalidArgument"
+	case DeadlineExceeded:
+		return "DeadlineExceeded"
+	case NotFound:
+		return "NotFound"
+	case AlreadyExists:
+		return "AlreadyExists"
+	case PermissionDenied:
+		return "PermissionDenied"
+	case ResourceExhausted:
+		return "ResourceExhausted"
+	case FailedPrecondition:
+		return "FailedPrecondition"
+	case Aborted:
+		return "Aborted"
+	case OutOfRange:
+		return "OutOfRange"
+	case Unimplemented:
+		return "Unimplemented"
+	case Internal:
+		return "Internal"
+	case Unavailable:
+		return "Unavailable"
+	case DataLoss:
+		return "DataLoss"
+	case Unauthenticated:
+		return "Unauthenticated"
+	default:
+		return "Code(" + strconv.FormatInt(int64(c), 10) + ")"
 	}
-	return _Code_name[_Code_index[i]:_Code_index[i+1]]
 }

vendor/google.golang.org/grpc/codes/codes.go

@@ -20,11 +20,14 @@
 // consistent across various languages.
 package codes
 
+import (
+	"fmt"
+	"strconv"
+)
+
 // A Code is an unsigned 32-bit error code as defined in the gRPC spec.
 type Code uint32
 
-//go:generate stringer -type=Code
-
 const (
 	// OK is returned on success.
 	OK Code = 0
@@ -68,10 +71,6 @@ const (
 	// instead for those errors).
 	PermissionDenied Code = 7
 
-	// Unauthenticated indicates the request does not have valid
-	// authentication credentials for the operation.
-	Unauthenticated Code = 16
-
 	// ResourceExhausted indicates some resource has been exhausted, perhaps
 	// a per-user quota, or perhaps the entire file system is out of space.
 	ResourceExhausted Code = 8
@@ -141,4 +140,58 @@ const (
 
 	// DataLoss indicates unrecoverable data loss or corruption.
 	DataLoss Code = 15
+
+	// Unauthenticated indicates the request does not have valid
+	// authentication credentials for the operation.
+	Unauthenticated Code = 16
+
+	_maxCode = 17
 )
+
+var strToCode = map[string]Code{
+	`"OK"`: OK,
+	`"CANCELLED"`:/* [sic] */ Canceled,
+	`"UNKNOWN"`:             Unknown,
+	`"INVALID_ARGUMENT"`:    InvalidArgument,
+	`"DEADLINE_EXCEEDED"`:   DeadlineExceeded,
+	`"NOT_FOUND"`:           NotFound,
+	`"ALREADY_EXISTS"`:      AlreadyExists,
+	`"PERMISSION_DENIED"`:   PermissionDenied,
+	`"RESOURCE_EXHAUSTED"`:  ResourceExhausted,
+	`"FAILED_PRECONDITION"`: FailedPrecondition,
+	`"ABORTED"`:             Aborted,
+	`"OUT_OF_RANGE"`:        OutOfRange,
+	`"UNIMPLEMENTED"`:       Unimplemented,
+	`"INTERNAL"`:            Internal,
+	`"UNAVAILABLE"`:         Unavailable,
+	`"DATA_LOSS"`:           DataLoss,
+	`"UNAUTHENTICATED"`:     Unauthenticated,
+}
+
+// UnmarshalJSON unmarshals b into the Code.
+func (c *Code) UnmarshalJSON(b []byte) error {
+	// From json.Unmarshaler: By convention, to approximate the behavior of
+	// Unmarshal itself, Unmarshalers implement UnmarshalJSON([]byte("null")) as
+	// a no-op.
+	if string(b) == "null" {
+		return nil
+	}
+	if c == nil {
+		return fmt.Errorf("nil receiver passed to UnmarshalJSON")
+	}
+
+	if ci, err := strconv.ParseUint(string(b), 10, 32); err == nil {
+		if ci >= _maxCode {
+			return fmt.Errorf("invalid code: %q", ci)
+		}
+
+		*c = Code(ci)
+		return nil
+	}
+
+	if jc, ok := strToCode[string(b)]; ok {
+		*c = jc
+		return nil
+	}
+	return fmt.Errorf("invalid code: %q", string(b))
+}

vendor/google.golang.org/grpc/credentials/credentials.go

@@ -34,10 +34,8 @@ import (
 	"golang.org/x/net/context"
 )
 
-var (
+// alpnProtoStr are the specified application level protocols for gRPC.
-	// alpnProtoStr are the specified application level protocols for gRPC.
+var alpnProtoStr = []string{"h2"}
-	alpnProtoStr = []string{"h2"}
-)
 
 // PerRPCCredentials defines the common interface for the credentials which need to
 // attach security information to every RPC (e.g., oauth2).
@@ -45,8 +43,9 @@ type PerRPCCredentials interface {
 	// GetRequestMetadata gets the current request metadata, refreshing
 	// tokens if required. This should be called by the transport layer on
 	// each request, and the data should be populated in headers or other
-	// context. uri is the URI of the entry point for the request. When
+	// context. If a status code is returned, it will be used as the status
-	// supported by the underlying implementation, ctx can be used for
+	// for the RPC. uri is the URI of the entry point for the request.
+	// When supported by the underlying implementation, ctx can be used for
 	// timeout and cancellation.
 	// TODO(zhaoq): Define the set of the qualified keys instead of leaving
 	// it as an arbitrary string.
@@ -74,11 +73,9 @@ type AuthInfo interface {
 	AuthType() string
 }
 
-var (
+// ErrConnDispatched indicates that rawConn has been dispatched out of gRPC
-	// ErrConnDispatched indicates that rawConn has been dispatched out of gRPC
+// and the caller should not close rawConn.
-	// and the caller should not close rawConn.
+var ErrConnDispatched = errors.New("credentials: rawConn is dispatched out of gRPC")
-	ErrConnDispatched = errors.New("credentials: rawConn is dispatched out of gRPC")
-)
 
 // TransportCredentials defines the common interface for all the live gRPC wire
 // protocols and supported transport security protocols (e.g., TLS, SSL).
@@ -135,15 +132,15 @@ func (c tlsCreds) Info() ProtocolInfo {
 	}
 }
 
-func (c *tlsCreds) ClientHandshake(ctx context.Context, addr string, rawConn net.Conn) (_ net.Conn, _ AuthInfo, err error) {
+func (c *tlsCreds) ClientHandshake(ctx context.Context, authority string, rawConn net.Conn) (_ net.Conn, _ AuthInfo, err error) {
 	// use local cfg to avoid clobbering ServerName if using multiple endpoints
 	cfg := cloneTLSConfig(c.config)
 	if cfg.ServerName == "" {
-		colonPos := strings.LastIndex(addr, ":")
+		colonPos := strings.LastIndex(authority, ":")
 		if colonPos == -1 {
-			colonPos = len(addr)
+			colonPos = len(authority)
 		}
-		cfg.ServerName = addr[:colonPos]
+		cfg.ServerName = authority[:colonPos]
 	}
 	conn := tls.Client(rawConn, cfg)
 	errChannel := make(chan error, 1)

vendor/google.golang.org/grpc/encoding/BUILD

@@ -0,0 +1,26 @@
+load("@io_bazel_rules_go//go:def.bzl", "go_library")
+
+go_library(
+    name = "go_default_library",
+    srcs = ["encoding.go"],
+    importmap = "k8s.io/kubernetes/vendor/google.golang.org/grpc/encoding",
+    importpath = "google.golang.org/grpc/encoding",
+    visibility = ["//visibility:public"],
+)
+
+filegroup(
+    name = "package-srcs",
+    srcs = glob(["**"]),
+    tags = ["automanaged"],
+    visibility = ["//visibility:private"],
+)
+
+filegroup(
+    name = "all-srcs",
+    srcs = [
+        ":package-srcs",
+        "//vendor/google.golang.org/grpc/encoding/proto:all-srcs",
+    ],
+    tags = ["automanaged"],
+    visibility = ["//visibility:public"],
+)

vendor/google.golang.org/grpc/encoding/encoding.go

@@ -0,0 +1,118 @@
+/*
+ *
+ * Copyright 2017 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+// Package encoding defines the interface for the compressor and codec, and
+// functions to register and retrieve compressors and codecs.
+//
+// This package is EXPERIMENTAL.
+package encoding
+
+import (
+	"io"
+	"strings"
+)
+
+// Identity specifies the optional encoding for uncompressed streams.
+// It is intended for grpc internal use only.
+const Identity = "identity"
+
+// Compressor is used for compressing and decompressing when sending or
+// receiving messages.
+type Compressor interface {
+	// Compress writes the data written to wc to w after compressing it.  If an
+	// error occurs while initializing the compressor, that error is returned
+	// instead.
+	Compress(w io.Writer) (io.WriteCloser, error)
+	// Decompress reads data from r, decompresses it, and provides the
+	// uncompressed data via the returned io.Reader.  If an error occurs while
+	// initializing the decompressor, that error is returned instead.
+	Decompress(r io.Reader) (io.Reader, error)
+	// Name is the name of the compression codec and is used to set the content
+	// coding header.  The result must be static; the result cannot change
+	// between calls.
+	Name() string
+}
+
+var registeredCompressor = make(map[string]Compressor)
+
+// RegisterCompressor registers the compressor with gRPC by its name.  It can
+// be activated when sending an RPC via grpc.UseCompressor().  It will be
+// automatically accessed when receiving a message based on the content coding
+// header.  Servers also use it to send a response with the same encoding as
+// the request.
+//
+// NOTE: this function must only be called during initialization time (i.e. in
+// an init() function), and is not thread-safe.  If multiple Compressors are
+// registered with the same name, the one registered last will take effect.
+func RegisterCompressor(c Compressor) {
+	registeredCompressor[c.Name()] = c
+}
+
+// GetCompressor returns Compressor for the given compressor name.
+func GetCompressor(name string) Compressor {
+	return registeredCompressor[name]
+}
+
+// Codec defines the interface gRPC uses to encode and decode messages.  Note
+// that implementations of this interface must be thread safe; a Codec's
+// methods can be called from concurrent goroutines.
+type Codec interface {
+	// Marshal returns the wire format of v.
+	Marshal(v interface{}) ([]byte, error)
+	// Unmarshal parses the wire format into v.
+	Unmarshal(data []byte, v interface{}) error
+	// Name returns the name of the Codec implementation. The returned string
+	// will be used as part of content type in transmission.  The result must be
+	// static; the result cannot change between calls.
+	Name() string
+}
+
+var registeredCodecs = make(map[string]Codec)
+
+// RegisterCodec registers the provided Codec for use with all gRPC clients and
+// servers.
+//
+// The Codec will be stored and looked up by result of its Name() method, which
+// should match the content-subtype of the encoding handled by the Codec.  This
+// is case-insensitive, and is stored and looked up as lowercase.  If the
+// result of calling Name() is an empty string, RegisterCodec will panic. See
+// Content-Type on
+// https://github.com/grpc/grpc/blob/master/doc/PROTOCOL-HTTP2.md#requests for
+// more details.
+//
+// NOTE: this function must only be called during initialization time (i.e. in
+// an init() function), and is not thread-safe.  If multiple Compressors are
+// registered with the same name, the one registered last will take effect.
+func RegisterCodec(codec Codec) {
+	if codec == nil {
+		panic("cannot register a nil Codec")
+	}
+	contentSubtype := strings.ToLower(codec.Name())
+	if contentSubtype == "" {
+		panic("cannot register Codec with empty string result for String()")
+	}
+	registeredCodecs[contentSubtype] = codec
+}
+
+// GetCodec gets a registered Codec by content-subtype, or nil if no Codec is
+// registered for the content-subtype.
+//
+// The content-subtype is expected to be lowercase.
+func GetCodec(contentSubtype string) Codec {
+	return registeredCodecs[contentSubtype]
+}

vendor/google.golang.org/grpc/encoding/proto/BUILD

@@ -0,0 +1,27 @@
+load("@io_bazel_rules_go//go:def.bzl", "go_library")
+
+go_library(
+    name = "go_default_library",
+    srcs = ["proto.go"],
+    importmap = "k8s.io/kubernetes/vendor/google.golang.org/grpc/encoding/proto",
+    importpath = "google.golang.org/grpc/encoding/proto",
+    visibility = ["//visibility:public"],
+    deps = [
+        "//vendor/github.com/golang/protobuf/proto:go_default_library",
+        "//vendor/google.golang.org/grpc/encoding:go_default_library",
+    ],
+)
+
+filegroup(
+    name = "package-srcs",
+    srcs = glob(["**"]),
+    tags = ["automanaged"],
+    visibility = ["//visibility:private"],
+)
+
+filegroup(
+    name = "all-srcs",
+    srcs = [":package-srcs"],
+    tags = ["automanaged"],
+    visibility = ["//visibility:public"],
+)

vendor/google.golang.org/grpc/encoding/proto/proto.go

@@ -0,0 +1,110 @@
+/*
+ *
+ * Copyright 2018 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+// Package proto defines the protobuf codec. Importing this package will
+// register the codec.
+package proto
+
+import (
+	"math"
+	"sync"
+
+	"github.com/golang/protobuf/proto"
+	"google.golang.org/grpc/encoding"
+)
+
+// Name is the name registered for the proto compressor.
+const Name = "proto"
+
+func init() {
+	encoding.RegisterCodec(codec{})
+}
+
+// codec is a Codec implementation with protobuf. It is the default codec for gRPC.
+type codec struct{}
+
+type cachedProtoBuffer struct {
+	lastMarshaledSize uint32
+	proto.Buffer
+}
+
+func capToMaxInt32(val int) uint32 {
+	if val > math.MaxInt32 {
+		return uint32(math.MaxInt32)
+	}
+	return uint32(val)
+}
+
+func marshal(v interface{}, cb *cachedProtoBuffer) ([]byte, error) {
+	protoMsg := v.(proto.Message)
+	newSlice := make([]byte, 0, cb.lastMarshaledSize)
+
+	cb.SetBuf(newSlice)
+	cb.Reset()
+	if err := cb.Marshal(protoMsg); err != nil {
+		return nil, err
+	}
+	out := cb.Bytes()
+	cb.lastMarshaledSize = capToMaxInt32(len(out))
+	return out, nil
+}
+
+func (codec) Marshal(v interface{}) ([]byte, error) {
+	if pm, ok := v.(proto.Marshaler); ok {
+		// object can marshal itself, no need for buffer
+		return pm.Marshal()
+	}
+
+	cb := protoBufferPool.Get().(*cachedProtoBuffer)
+	out, err := marshal(v, cb)
+
+	// put back buffer and lose the ref to the slice
+	cb.SetBuf(nil)
+	protoBufferPool.Put(cb)
+	return out, err
+}
+
+func (codec) Unmarshal(data []byte, v interface{}) error {
+	protoMsg := v.(proto.Message)
+	protoMsg.Reset()
+
+	if pu, ok := protoMsg.(proto.Unmarshaler); ok {
+		// object can unmarshal itself, no need for buffer
+		return pu.Unmarshal(data)
+	}
+
+	cb := protoBufferPool.Get().(*cachedProtoBuffer)
+	cb.SetBuf(data)
+	err := cb.Unmarshal(protoMsg)
+	cb.SetBuf(nil)
+	protoBufferPool.Put(cb)
+	return err
+}
+
+func (codec) Name() string {
+	return Name
+}
+
+var protoBufferPool = &sync.Pool{
+	New: func() interface{} {
+		return &cachedProtoBuffer{
+			Buffer:            proto.Buffer{},
+			lastMarshaledSize: 16,
+		}
+	},
+}

vendor/google.golang.org/grpc/envconfig.go

@@ -0,0 +1,37 @@
+/*
+ *
+ * Copyright 2018 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package grpc
+
+import (
+	"os"
+	"strings"
+)
+
+const (
+	envConfigPrefix        = "GRPC_GO_"
+	envConfigStickinessStr = envConfigPrefix + "STICKINESS"
+)
+
+var (
+	envConfigStickinessOn bool
+)
+
+func init() {
+	envConfigStickinessOn = strings.EqualFold(os.Getenv(envConfigStickinessStr), "on")
+}

vendor/google.golang.org/grpc/go16.go

@@ -0,0 +1,70 @@
+// +build go1.6,!go1.7
+
+/*
+ *
+ * Copyright 2016 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package grpc
+
+import (
+	"fmt"
+	"io"
+	"net"
+	"net/http"
+
+	"golang.org/x/net/context"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
+	"google.golang.org/grpc/transport"
+)
+
+// dialContext connects to the address on the named network.
+func dialContext(ctx context.Context, network, address string) (net.Conn, error) {
+	return (&net.Dialer{Cancel: ctx.Done()}).Dial(network, address)
+}
+
+func sendHTTPRequest(ctx context.Context, req *http.Request, conn net.Conn) error {
+	req.Cancel = ctx.Done()
+	if err := req.Write(conn); err != nil {
+		return fmt.Errorf("failed to write the HTTP request: %v", err)
+	}
+	return nil
+}
+
+// toRPCErr converts an error into an error from the status package.
+func toRPCErr(err error) error {
+	if err == nil || err == io.EOF {
+		return err
+	}
+	if _, ok := status.FromError(err); ok {
+		return err
+	}
+	switch e := err.(type) {
+	case transport.StreamError:
+		return status.Error(e.Code, e.Desc)
+	case transport.ConnectionError:
+		return status.Error(codes.Unavailable, e.Desc)
+	default:
+		switch err {
+		case context.DeadlineExceeded:
+			return status.Error(codes.DeadlineExceeded, err.Error())
+		case context.Canceled:
+			return status.Error(codes.Canceled, err.Error())
+		}
+	}
+	return status.Error(codes.Unknown, err.Error())
+}

vendor/google.golang.org/grpc/go17.go

@@ -0,0 +1,71 @@
+// +build go1.7
+
+/*
+ *
+ * Copyright 2016 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package grpc
+
+import (
+	"context"
+	"fmt"
+	"io"
+	"net"
+	"net/http"
+
+	netctx "golang.org/x/net/context"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
+	"google.golang.org/grpc/transport"
+)
+
+// dialContext connects to the address on the named network.
+func dialContext(ctx context.Context, network, address string) (net.Conn, error) {
+	return (&net.Dialer{}).DialContext(ctx, network, address)
+}
+
+func sendHTTPRequest(ctx context.Context, req *http.Request, conn net.Conn) error {
+	req = req.WithContext(ctx)
+	if err := req.Write(conn); err != nil {
+		return fmt.Errorf("failed to write the HTTP request: %v", err)
+	}
+	return nil
+}
+
+// toRPCErr converts an error into an error from the status package.
+func toRPCErr(err error) error {
+	if err == nil || err == io.EOF {
+		return err
+	}
+	if _, ok := status.FromError(err); ok {
+		return err
+	}
+	switch e := err.(type) {
+	case transport.StreamError:
+		return status.Error(e.Code, e.Desc)
+	case transport.ConnectionError:
+		return status.Error(codes.Unavailable, e.Desc)
+	default:
+		switch err {
+		case context.DeadlineExceeded, netctx.DeadlineExceeded:
+			return status.Error(codes.DeadlineExceeded, err.Error())
+		case context.Canceled, netctx.Canceled:
+			return status.Error(codes.Canceled, err.Error())
+		}
+	}
+	return status.Error(codes.Unknown, err.Error())
+}

vendor/google.golang.org/grpc/grpclb.go

@@ -1,704 +0,0 @@
-/*
- *
- * Copyright 2016 gRPC authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- */
-
-package grpc
-
-import (
-	"errors"
-	"fmt"
-	"math/rand"
-	"net"
-	"sync"
-	"time"
-
-	"golang.org/x/net/context"
-	"google.golang.org/grpc/codes"
-	lbmpb "google.golang.org/grpc/grpclb/grpc_lb_v1/messages"
-	"google.golang.org/grpc/grpclog"
-	"google.golang.org/grpc/metadata"
-	"google.golang.org/grpc/naming"
-)
-
-// Client API for LoadBalancer service.
-// Mostly copied from generated pb.go file.
-// To avoid circular dependency.
-type loadBalancerClient struct {
-	cc *ClientConn
-}
-
-func (c *loadBalancerClient) BalanceLoad(ctx context.Context, opts ...CallOption) (*balanceLoadClientStream, error) {
-	desc := &StreamDesc{
-		StreamName:    "BalanceLoad",
-		ServerStreams: true,
-		ClientStreams: true,
-	}
-	stream, err := NewClientStream(ctx, desc, c.cc, "/grpc.lb.v1.LoadBalancer/BalanceLoad", opts...)
-	if err != nil {
-		return nil, err
-	}
-	x := &balanceLoadClientStream{stream}
-	return x, nil
-}
-
-type balanceLoadClientStream struct {
-	ClientStream
-}
-
-func (x *balanceLoadClientStream) Send(m *lbmpb.LoadBalanceRequest) error {
-	return x.ClientStream.SendMsg(m)
-}
-
-func (x *balanceLoadClientStream) Recv() (*lbmpb.LoadBalanceResponse, error) {
-	m := new(lbmpb.LoadBalanceResponse)
-	if err := x.ClientStream.RecvMsg(m); err != nil {
-		return nil, err
-	}
-	return m, nil
-}
-
-// NewGRPCLBBalancer creates a grpclb load balancer.
-func NewGRPCLBBalancer(r naming.Resolver) Balancer {
-	return &grpclbBalancer{
-		r: r,
-	}
-}
-
-type remoteBalancerInfo struct {
-	addr string
-	// the server name used for authentication with the remote LB server.
-	name string
-}
-
-// grpclbAddrInfo consists of the information of a backend server.
-type grpclbAddrInfo struct {
-	addr      Address
-	connected bool
-	// dropForRateLimiting indicates whether this particular request should be
-	// dropped by the client for rate limiting.
-	dropForRateLimiting bool
-	// dropForLoadBalancing indicates whether this particular request should be
-	// dropped by the client for load balancing.
-	dropForLoadBalancing bool
-}
-
-type grpclbBalancer struct {
-	r      naming.Resolver
-	target string
-	mu     sync.Mutex
-	seq    int // a sequence number to make sure addrCh does not get stale addresses.
-	w      naming.Watcher
-	addrCh chan []Address
-	rbs    []remoteBalancerInfo
-	addrs  []*grpclbAddrInfo
-	next   int
-	waitCh chan struct{}
-	done   bool
-	rand   *rand.Rand
-
-	clientStats lbmpb.ClientStats
-}
-
-func (b *grpclbBalancer) watchAddrUpdates(w naming.Watcher, ch chan []remoteBalancerInfo) error {
-	updates, err := w.Next()
-	if err != nil {
-		grpclog.Warningf("grpclb: failed to get next addr update from watcher: %v", err)
-		return err
-	}
-	b.mu.Lock()
-	defer b.mu.Unlock()
-	if b.done {
-		return ErrClientConnClosing
-	}
-	for _, update := range updates {
-		switch update.Op {
-		case naming.Add:
-			var exist bool
-			for _, v := range b.rbs {
-				// TODO: Is the same addr with different server name a different balancer?
-				if update.Addr == v.addr {
-					exist = true
-					break
-				}
-			}
-			if exist {
-				continue
-			}
-			md, ok := update.Metadata.(*naming.AddrMetadataGRPCLB)
-			if !ok {
-				// TODO: Revisit the handling here and may introduce some fallback mechanism.
-				grpclog.Errorf("The name resolution contains unexpected metadata %v", update.Metadata)
-				continue
-			}
-			switch md.AddrType {
-			case naming.Backend:
-				// TODO: Revisit the handling here and may introduce some fallback mechanism.
-				grpclog.Errorf("The name resolution does not give grpclb addresses")
-				continue
-			case naming.GRPCLB:
-				b.rbs = append(b.rbs, remoteBalancerInfo{
-					addr: update.Addr,
-					name: md.ServerName,
-				})
-			default:
-				grpclog.Errorf("Received unknow address type %d", md.AddrType)
-				continue
-			}
-		case naming.Delete:
-			for i, v := range b.rbs {
-				if update.Addr == v.addr {
-					copy(b.rbs[i:], b.rbs[i+1:])
-					b.rbs = b.rbs[:len(b.rbs)-1]
-					break
-				}
-			}
-		default:
-			grpclog.Errorf("Unknown update.Op %v", update.Op)
-		}
-	}
-	// TODO: Fall back to the basic round-robin load balancing if the resulting address is
-	// not a load balancer.
-	select {
-	case <-ch:
-	default:
-	}
-	ch <- b.rbs
-	return nil
-}
-
-func convertDuration(d *lbmpb.Duration) time.Duration {
-	if d == nil {
-		return 0
-	}
-	return time.Duration(d.Seconds)*time.Second + time.Duration(d.Nanos)*time.Nanosecond
-}
-
-func (b *grpclbBalancer) processServerList(l *lbmpb.ServerList, seq int) {
-	if l == nil {
-		return
-	}
-	servers := l.GetServers()
-	var (
-		sl    []*grpclbAddrInfo
-		addrs []Address
-	)
-	for _, s := range servers {
-		md := metadata.Pairs("lb-token", s.LoadBalanceToken)
-		ip := net.IP(s.IpAddress)
-		ipStr := ip.String()
-		if ip.To4() == nil {
-			// Add square brackets to ipv6 addresses, otherwise net.Dial() and
-			// net.SplitHostPort() will return too many colons error.
-			ipStr = fmt.Sprintf("[%s]", ipStr)
-		}
-		addr := Address{
-			Addr:     fmt.Sprintf("%s:%d", ipStr, s.Port),
-			Metadata: &md,
-		}
-		sl = append(sl, &grpclbAddrInfo{
-			addr:                 addr,
-			dropForRateLimiting:  s.DropForRateLimiting,
-			dropForLoadBalancing: s.DropForLoadBalancing,
-		})
-		addrs = append(addrs, addr)
-	}
-	b.mu.Lock()
-	defer b.mu.Unlock()
-	if b.done || seq < b.seq {
-		return
-	}
-	if len(sl) > 0 {
-		// reset b.next to 0 when replacing the server list.
-		b.next = 0
-		b.addrs = sl
-		b.addrCh <- addrs
-	}
-	return
-}
-
-func (b *grpclbBalancer) sendLoadReport(s *balanceLoadClientStream, interval time.Duration, done <-chan struct{}) {
-	ticker := time.NewTicker(interval)
-	defer ticker.Stop()
-	for {
-		select {
-		case <-ticker.C:
-		case <-done:
-			return
-		}
-		b.mu.Lock()
-		stats := b.clientStats
-		b.clientStats = lbmpb.ClientStats{} // Clear the stats.
-		b.mu.Unlock()
-		t := time.Now()
-		stats.Timestamp = &lbmpb.Timestamp{
-			Seconds: t.Unix(),
-			Nanos:   int32(t.Nanosecond()),
-		}
-		if err := s.Send(&lbmpb.LoadBalanceRequest{
-			LoadBalanceRequestType: &lbmpb.LoadBalanceRequest_ClientStats{
-				ClientStats: &stats,
-			},
-		}); err != nil {
-			grpclog.Errorf("grpclb: failed to send load report: %v", err)
-			return
-		}
-	}
-}
-
-func (b *grpclbBalancer) callRemoteBalancer(lbc *loadBalancerClient, seq int) (retry bool) {
-	ctx, cancel := context.WithCancel(context.Background())
-	defer cancel()
-	stream, err := lbc.BalanceLoad(ctx)
-	if err != nil {
-		grpclog.Errorf("grpclb: failed to perform RPC to the remote balancer %v", err)
-		return
-	}
-	b.mu.Lock()
-	if b.done {
-		b.mu.Unlock()
-		return
-	}
-	b.mu.Unlock()
-	initReq := &lbmpb.LoadBalanceRequest{
-		LoadBalanceRequestType: &lbmpb.LoadBalanceRequest_InitialRequest{
-			InitialRequest: &lbmpb.InitialLoadBalanceRequest{
-				Name: b.target,
-			},
-		},
-	}
-	if err := stream.Send(initReq); err != nil {
-		grpclog.Errorf("grpclb: failed to send init request: %v", err)
-		// TODO: backoff on retry?
-		return true
-	}
-	reply, err := stream.Recv()
-	if err != nil {
-		grpclog.Errorf("grpclb: failed to recv init response: %v", err)
-		// TODO: backoff on retry?
-		return true
-	}
-	initResp := reply.GetInitialResponse()
-	if initResp == nil {
-		grpclog.Errorf("grpclb: reply from remote balancer did not include initial response.")
-		return
-	}
-	// TODO: Support delegation.
-	if initResp.LoadBalancerDelegate != "" {
-		// delegation
-		grpclog.Errorf("TODO: Delegation is not supported yet.")
-		return
-	}
-	streamDone := make(chan struct{})
-	defer close(streamDone)
-	b.mu.Lock()
-	b.clientStats = lbmpb.ClientStats{} // Clear client stats.
-	b.mu.Unlock()
-	if d := convertDuration(initResp.ClientStatsReportInterval); d > 0 {
-		go b.sendLoadReport(stream, d, streamDone)
-	}
-	// Retrieve the server list.
-	for {
-		reply, err := stream.Recv()
-		if err != nil {
-			grpclog.Errorf("grpclb: failed to recv server list: %v", err)
-			break
-		}
-		b.mu.Lock()
-		if b.done || seq < b.seq {
-			b.mu.Unlock()
-			return
-		}
-		b.seq++ // tick when receiving a new list of servers.
-		seq = b.seq
-		b.mu.Unlock()
-		if serverList := reply.GetServerList(); serverList != nil {
-			b.processServerList(serverList, seq)
-		}
-	}
-	return true
-}
-
-func (b *grpclbBalancer) Start(target string, config BalancerConfig) error {
-	b.rand = rand.New(rand.NewSource(time.Now().Unix()))
-	// TODO: Fall back to the basic direct connection if there is no name resolver.
-	if b.r == nil {
-		return errors.New("there is no name resolver installed")
-	}
-	b.target = target
-	b.mu.Lock()
-	if b.done {
-		b.mu.Unlock()
-		return ErrClientConnClosing
-	}
-	b.addrCh = make(chan []Address)
-	w, err := b.r.Resolve(target)
-	if err != nil {
-		b.mu.Unlock()
-		grpclog.Errorf("grpclb: failed to resolve address: %v, err: %v", target, err)
-		return err
-	}
-	b.w = w
-	b.mu.Unlock()
-	balancerAddrsCh := make(chan []remoteBalancerInfo, 1)
-	// Spawn a goroutine to monitor the name resolution of remote load balancer.
-	go func() {
-		for {
-			if err := b.watchAddrUpdates(w, balancerAddrsCh); err != nil {
-				grpclog.Warningf("grpclb: the naming watcher stops working due to %v.\n", err)
-				close(balancerAddrsCh)
-				return
-			}
-		}
-	}()
-	// Spawn a goroutine to talk to the remote load balancer.
-	go func() {
-		var (
-			cc *ClientConn
-			// ccError is closed when there is an error in the current cc.
-			// A new rb should be picked from rbs and connected.
-			ccError chan struct{}
-			rb      *remoteBalancerInfo
-			rbs     []remoteBalancerInfo
-			rbIdx   int
-		)
-
-		defer func() {
-			if ccError != nil {
-				select {
-				case <-ccError:
-				default:
-					close(ccError)
-				}
-			}
-			if cc != nil {
-				cc.Close()
-			}
-		}()
-
-		for {
-			var ok bool
-			select {
-			case rbs, ok = <-balancerAddrsCh:
-				if !ok {
-					return
-				}
-				foundIdx := -1
-				if rb != nil {
-					for i, trb := range rbs {
-						if trb == *rb {
-							foundIdx = i
-							break
-						}
-					}
-				}
-				if foundIdx >= 0 {
-					if foundIdx >= 1 {
-						// Move the address in use to the beginning of the list.
-						b.rbs[0], b.rbs[foundIdx] = b.rbs[foundIdx], b.rbs[0]
-						rbIdx = 0
-					}
-					continue // If found, don't dial new cc.
-				} else if len(rbs) > 0 {
-					// Pick a random one from the list, instead of always using the first one.
-					if l := len(rbs); l > 1 && rb != nil {
-						tmpIdx := b.rand.Intn(l - 1)
-						b.rbs[0], b.rbs[tmpIdx] = b.rbs[tmpIdx], b.rbs[0]
-					}
-					rbIdx = 0
-					rb = &rbs[0]
-				} else {
-					// foundIdx < 0 && len(rbs) <= 0.
-					rb = nil
-				}
-			case <-ccError:
-				ccError = nil
-				if rbIdx < len(rbs)-1 {
-					rbIdx++
-					rb = &rbs[rbIdx]
-				} else {
-					rb = nil
-				}
-			}
-
-			if rb == nil {
-				continue
-			}
-
-			if cc != nil {
-				cc.Close()
-			}
-			// Talk to the remote load balancer to get the server list.
-			var (
-				err   error
-				dopts []DialOption
-			)
-			if creds := config.DialCreds; creds != nil {
-				if rb.name != "" {
-					if err := creds.OverrideServerName(rb.name); err != nil {
-						grpclog.Warningf("grpclb: failed to override the server name in the credentials: %v", err)
-						continue
-					}
-				}
-				dopts = append(dopts, WithTransportCredentials(creds))
-			} else {
-				dopts = append(dopts, WithInsecure())
-			}
-			if dialer := config.Dialer; dialer != nil {
-				// WithDialer takes a different type of function, so we instead use a special DialOption here.
-				dopts = append(dopts, func(o *dialOptions) { o.copts.Dialer = dialer })
-			}
-			dopts = append(dopts, WithBlock())
-			ccError = make(chan struct{})
-			ctx, cancel := context.WithTimeout(context.Background(), time.Second)
-			cc, err = DialContext(ctx, rb.addr, dopts...)
-			cancel()
-			if err != nil {
-				grpclog.Warningf("grpclb: failed to setup a connection to the remote balancer %v: %v", rb.addr, err)
-				close(ccError)
-				continue
-			}
-			b.mu.Lock()
-			b.seq++ // tick when getting a new balancer address
-			seq := b.seq
-			b.next = 0
-			b.mu.Unlock()
-			go func(cc *ClientConn, ccError chan struct{}) {
-				lbc := &loadBalancerClient{cc}
-				b.callRemoteBalancer(lbc, seq)
-				cc.Close()
-				select {
-				case <-ccError:
-				default:
-					close(ccError)
-				}
-			}(cc, ccError)
-		}
-	}()
-	return nil
-}
-
-func (b *grpclbBalancer) down(addr Address, err error) {
-	b.mu.Lock()
-	defer b.mu.Unlock()
-	for _, a := range b.addrs {
-		if addr == a.addr {
-			a.connected = false
-			break
-		}
-	}
-}
-
-func (b *grpclbBalancer) Up(addr Address) func(error) {
-	b.mu.Lock()
-	defer b.mu.Unlock()
-	if b.done {
-		return nil
-	}
-	var cnt int
-	for _, a := range b.addrs {
-		if a.addr == addr {
-			if a.connected {
-				return nil
-			}
-			a.connected = true
-		}
-		if a.connected && !a.dropForRateLimiting && !a.dropForLoadBalancing {
-			cnt++
-		}
-	}
-	// addr is the only one which is connected. Notify the Get() callers who are blocking.
-	if cnt == 1 && b.waitCh != nil {
-		close(b.waitCh)
-		b.waitCh = nil
-	}
-	return func(err error) {
-		b.down(addr, err)
-	}
-}
-
-func (b *grpclbBalancer) Get(ctx context.Context, opts BalancerGetOptions) (addr Address, put func(), err error) {
-	var ch chan struct{}
-	b.mu.Lock()
-	if b.done {
-		b.mu.Unlock()
-		err = ErrClientConnClosing
-		return
-	}
-	seq := b.seq
-
-	defer func() {
-		if err != nil {
-			return
-		}
-		put = func() {
-			s, ok := rpcInfoFromContext(ctx)
-			if !ok {
-				return
-			}
-			b.mu.Lock()
-			defer b.mu.Unlock()
-			if b.done || seq < b.seq {
-				return
-			}
-			b.clientStats.NumCallsFinished++
-			if !s.bytesSent {
-				b.clientStats.NumCallsFinishedWithClientFailedToSend++
-			} else if s.bytesReceived {
-				b.clientStats.NumCallsFinishedKnownReceived++
-			}
-		}
-	}()
-
-	b.clientStats.NumCallsStarted++
-	if len(b.addrs) > 0 {
-		if b.next >= len(b.addrs) {
-			b.next = 0
-		}
-		next := b.next
-		for {
-			a := b.addrs[next]
-			next = (next + 1) % len(b.addrs)
-			if a.connected {
-				if !a.dropForRateLimiting && !a.dropForLoadBalancing {
-					addr = a.addr
-					b.next = next
-					b.mu.Unlock()
-					return
-				}
-				if !opts.BlockingWait {
-					b.next = next
-					if a.dropForLoadBalancing {
-						b.clientStats.NumCallsFinished++
-						b.clientStats.NumCallsFinishedWithDropForLoadBalancing++
-					} else if a.dropForRateLimiting {
-						b.clientStats.NumCallsFinished++
-						b.clientStats.NumCallsFinishedWithDropForRateLimiting++
-					}
-					b.mu.Unlock()
-					err = Errorf(codes.Unavailable, "%s drops requests", a.addr.Addr)
-					return
-				}
-			}
-			if next == b.next {
-				// Has iterated all the possible address but none is connected.
-				break
-			}
-		}
-	}
-	if !opts.BlockingWait {
-		b.clientStats.NumCallsFinished++
-		b.clientStats.NumCallsFinishedWithClientFailedToSend++
-		b.mu.Unlock()
-		err = Errorf(codes.Unavailable, "there is no address available")
-		return
-	}
-	// Wait on b.waitCh for non-failfast RPCs.
-	if b.waitCh == nil {
-		ch = make(chan struct{})
-		b.waitCh = ch
-	} else {
-		ch = b.waitCh
-	}
-	b.mu.Unlock()
-	for {
-		select {
-		case <-ctx.Done():
-			b.mu.Lock()
-			b.clientStats.NumCallsFinished++
-			b.clientStats.NumCallsFinishedWithClientFailedToSend++
-			b.mu.Unlock()
-			err = ctx.Err()
-			return
-		case <-ch:
-			b.mu.Lock()
-			if b.done {
-				b.clientStats.NumCallsFinished++
-				b.clientStats.NumCallsFinishedWithClientFailedToSend++
-				b.mu.Unlock()
-				err = ErrClientConnClosing
-				return
-			}
-
-			if len(b.addrs) > 0 {
-				if b.next >= len(b.addrs) {
-					b.next = 0
-				}
-				next := b.next
-				for {
-					a := b.addrs[next]
-					next = (next + 1) % len(b.addrs)
-					if a.connected {
-						if !a.dropForRateLimiting && !a.dropForLoadBalancing {
-							addr = a.addr
-							b.next = next
-							b.mu.Unlock()
-							return
-						}
-						if !opts.BlockingWait {
-							b.next = next
-							if a.dropForLoadBalancing {
-								b.clientStats.NumCallsFinished++
-								b.clientStats.NumCallsFinishedWithDropForLoadBalancing++
-							} else if a.dropForRateLimiting {
-								b.clientStats.NumCallsFinished++
-								b.clientStats.NumCallsFinishedWithDropForRateLimiting++
-							}
-							b.mu.Unlock()
-							err = Errorf(codes.Unavailable, "drop requests for the addreess %s", a.addr.Addr)
-							return
-						}
-					}
-					if next == b.next {
-						// Has iterated all the possible address but none is connected.
-						break
-					}
-				}
-			}
-			// The newly added addr got removed by Down() again.
-			if b.waitCh == nil {
-				ch = make(chan struct{})
-				b.waitCh = ch
-			} else {
-				ch = b.waitCh
-			}
-			b.mu.Unlock()
-		}
-	}
-}
-
-func (b *grpclbBalancer) Notify() <-chan []Address {
-	return b.addrCh
-}
-
-func (b *grpclbBalancer) Close() error {
-	b.mu.Lock()
-	defer b.mu.Unlock()
-	if b.done {
-		return errBalancerClosed
-	}
-	b.done = true
-	if b.waitCh != nil {
-		close(b.waitCh)
-	}
-	if b.addrCh != nil {
-		close(b.addrCh)
-	}
-	if b.w != nil {
-		b.w.Close()
-	}
-	return nil
-}

vendor/google.golang.org/grpc/grpclb/grpc_lb_v1/messages/BUILD

@@ -6,7 +6,11 @@ go_library(
     importmap = "k8s.io/kubernetes/vendor/google.golang.org/grpc/grpclb/grpc_lb_v1/messages",
     importpath = "google.golang.org/grpc/grpclb/grpc_lb_v1/messages",
     visibility = ["//visibility:public"],
-    deps = ["//vendor/github.com/golang/protobuf/proto:go_default_library"],
+    deps = [
+        "//vendor/github.com/golang/protobuf/proto:go_default_library",
+        "//vendor/github.com/golang/protobuf/ptypes/duration:go_default_library",
+        "//vendor/github.com/golang/protobuf/ptypes/timestamp:go_default_library",
+    ],
 )
 
 filegroup(

vendor/google.golang.org/grpc/grpclb/grpc_lb_v1/messages/messages.pb.go

@@ -1,28 +1,13 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // source: grpc_lb_v1/messages/messages.proto
 
-/*
-Package messages is a generated protocol buffer package.
-
-It is generated from these files:
-	grpc_lb_v1/messages/messages.proto
-
-It has these top-level messages:
-	Duration
-	Timestamp
-	LoadBalanceRequest
-	InitialLoadBalanceRequest
-	ClientStats
-	LoadBalanceResponse
-	InitialLoadBalanceResponse
-	ServerList
-	Server
-*/
 package messages
 
 import proto "github.com/golang/protobuf/proto"
 import fmt "fmt"
 import math "math"
+import duration "github.com/golang/protobuf/ptypes/duration"
+import timestamp "github.com/golang/protobuf/ptypes/timestamp"
 
 // Reference imports to suppress errors if they are not otherwise used.
 var _ = proto.Marshal
@@ -35,90 +20,49 @@ var _ = math.Inf
 // proto package needs to be updated.
 const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
 
-type Duration struct {
-	// Signed seconds of the span of time. Must be from -315,576,000,000
-	// to +315,576,000,000 inclusive.
-	Seconds int64 `protobuf:"varint,1,opt,name=seconds" json:"seconds,omitempty"`
-	// Signed fractions of a second at nanosecond resolution of the span
-	// of time. Durations less than one second are represented with a 0
-	// `seconds` field and a positive or negative `nanos` field. For durations
-	// of one second or more, a non-zero value for the `nanos` field must be
-	// of the same sign as the `seconds` field. Must be from -999,999,999
-	// to +999,999,999 inclusive.
-	Nanos int32 `protobuf:"varint,2,opt,name=nanos" json:"nanos,omitempty"`
-}
-
-func (m *Duration) Reset()                    { *m = Duration{} }
-func (m *Duration) String() string            { return proto.CompactTextString(m) }
-func (*Duration) ProtoMessage()               {}
-func (*Duration) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{0} }
-
-func (m *Duration) GetSeconds() int64 {
-	if m != nil {
-		return m.Seconds
-	}
-	return 0
-}
-
-func (m *Duration) GetNanos() int32 {
-	if m != nil {
-		return m.Nanos
-	}
-	return 0
-}
-
-type Timestamp struct {
-	// Represents seconds of UTC time since Unix epoch
-	// 1970-01-01T00:00:00Z. Must be from 0001-01-01T00:00:00Z to
-	// 9999-12-31T23:59:59Z inclusive.
-	Seconds int64 `protobuf:"varint,1,opt,name=seconds" json:"seconds,omitempty"`
-	// Non-negative fractions of a second at nanosecond resolution. Negative
-	// second values with fractions must still have non-negative nanos values
-	// that count forward in time. Must be from 0 to 999,999,999
-	// inclusive.
-	Nanos int32 `protobuf:"varint,2,opt,name=nanos" json:"nanos,omitempty"`
-}
-
-func (m *Timestamp) Reset()                    { *m = Timestamp{} }
-func (m *Timestamp) String() string            { return proto.CompactTextString(m) }
-func (*Timestamp) ProtoMessage()               {}
-func (*Timestamp) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{1} }
-
-func (m *Timestamp) GetSeconds() int64 {
-	if m != nil {
-		return m.Seconds
-	}
-	return 0
-}
-
-func (m *Timestamp) GetNanos() int32 {
-	if m != nil {
-		return m.Nanos
-	}
-	return 0
-}
-
 type LoadBalanceRequest struct {
 	// Types that are valid to be assigned to LoadBalanceRequestType:
 	//	*LoadBalanceRequest_InitialRequest
 	//	*LoadBalanceRequest_ClientStats
 	LoadBalanceRequestType isLoadBalanceRequest_LoadBalanceRequestType `protobuf_oneof:"load_balance_request_type"`
+	XXX_NoUnkeyedLiteral   struct{}                                    `json:"-"`
+	XXX_unrecognized       []byte                                      `json:"-"`
+	XXX_sizecache          int32                                       `json:"-"`
 }
 
 func (m *LoadBalanceRequest) Reset()         { *m = LoadBalanceRequest{} }
 func (m *LoadBalanceRequest) String() string { return proto.CompactTextString(m) }
 func (*LoadBalanceRequest) ProtoMessage()    {}
-func (*LoadBalanceRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{2} }
+func (*LoadBalanceRequest) Descriptor() ([]byte, []int) {
+	return fileDescriptor_messages_b3d89fcb5aa158f8, []int{0}
+}
+func (m *LoadBalanceRequest) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_LoadBalanceRequest.Unmarshal(m, b)
+}
+func (m *LoadBalanceRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_LoadBalanceRequest.Marshal(b, m, deterministic)
+}
+func (dst *LoadBalanceRequest) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_LoadBalanceRequest.Merge(dst, src)
+}
+func (m *LoadBalanceRequest) XXX_Size() int {
+	return xxx_messageInfo_LoadBalanceRequest.Size(m)
+}
+func (m *LoadBalanceRequest) XXX_DiscardUnknown() {
+	xxx_messageInfo_LoadBalanceRequest.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_LoadBalanceRequest proto.InternalMessageInfo
 
 type isLoadBalanceRequest_LoadBalanceRequestType interface {
 	isLoadBalanceRequest_LoadBalanceRequestType()
 }
 
 type LoadBalanceRequest_InitialRequest struct {
-	InitialRequest *InitialLoadBalanceRequest `protobuf:"bytes,1,opt,name=initial_request,json=initialRequest,oneof"`
+	InitialRequest *InitialLoadBalanceRequest `protobuf:"bytes,1,opt,name=initial_request,json=initialRequest,proto3,oneof"`
 }
 type LoadBalanceRequest_ClientStats struct {
-	ClientStats *ClientStats `protobuf:"bytes,2,opt,name=client_stats,json=clientStats,oneof"`
+	ClientStats *ClientStats `protobuf:"bytes,2,opt,name=client_stats,json=clientStats,proto3,oneof"`
 }
 
 func (*LoadBalanceRequest_InitialRequest) isLoadBalanceRequest_LoadBalanceRequestType() {}
@@ -204,12 +148,12 @@ func _LoadBalanceRequest_OneofSizer(msg proto.Message) (n int) {
 	switch x := m.LoadBalanceRequestType.(type) {
 	case *LoadBalanceRequest_InitialRequest:
 		s := proto.Size(x.InitialRequest)
-		n += proto.SizeVarint(1<<3 | proto.WireBytes)
+		n += 1 // tag and wire
 		n += proto.SizeVarint(uint64(s))
 		n += s
 	case *LoadBalanceRequest_ClientStats:
 		s := proto.Size(x.ClientStats)
-		n += proto.SizeVarint(2<<3 | proto.WireBytes)
+		n += 1 // tag and wire
 		n += proto.SizeVarint(uint64(s))
 		n += s
 	case nil:
@@ -220,15 +164,37 @@ func _LoadBalanceRequest_OneofSizer(msg proto.Message) (n int) {
 }
 
 type InitialLoadBalanceRequest struct {
-	// Name of load balanced service (IE, balancer.service.com)
+	// Name of load balanced service (IE, balancer.service.com). Its
 	// length should be less than 256 bytes.
-	Name string `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"`
+	Name                 string   `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
 }
 
 func (m *InitialLoadBalanceRequest) Reset()         { *m = InitialLoadBalanceRequest{} }
 func (m *InitialLoadBalanceRequest) String() string { return proto.CompactTextString(m) }
 func (*InitialLoadBalanceRequest) ProtoMessage()    {}
-func (*InitialLoadBalanceRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{3} }
+func (*InitialLoadBalanceRequest) Descriptor() ([]byte, []int) {
+	return fileDescriptor_messages_b3d89fcb5aa158f8, []int{1}
+}
+func (m *InitialLoadBalanceRequest) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_InitialLoadBalanceRequest.Unmarshal(m, b)
+}
+func (m *InitialLoadBalanceRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_InitialLoadBalanceRequest.Marshal(b, m, deterministic)
+}
+func (dst *InitialLoadBalanceRequest) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_InitialLoadBalanceRequest.Merge(dst, src)
+}
+func (m *InitialLoadBalanceRequest) XXX_Size() int {
+	return xxx_messageInfo_InitialLoadBalanceRequest.Size(m)
+}
+func (m *InitialLoadBalanceRequest) XXX_DiscardUnknown() {
+	xxx_messageInfo_InitialLoadBalanceRequest.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_InitialLoadBalanceRequest proto.InternalMessageInfo
 
 func (m *InitialLoadBalanceRequest) GetName() string {
 	if m != nil {
@@ -237,34 +203,101 @@ func (m *InitialLoadBalanceRequest) GetName() string {
 	return ""
 }
 
+// Contains the number of calls finished for a particular load balance token.
+type ClientStatsPerToken struct {
+	// See Server.load_balance_token.
+	LoadBalanceToken string `protobuf:"bytes,1,opt,name=load_balance_token,json=loadBalanceToken,proto3" json:"load_balance_token,omitempty"`
+	// The total number of RPCs that finished associated with the token.
+	NumCalls             int64    `protobuf:"varint,2,opt,name=num_calls,json=numCalls,proto3" json:"num_calls,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *ClientStatsPerToken) Reset()         { *m = ClientStatsPerToken{} }
+func (m *ClientStatsPerToken) String() string { return proto.CompactTextString(m) }
+func (*ClientStatsPerToken) ProtoMessage()    {}
+func (*ClientStatsPerToken) Descriptor() ([]byte, []int) {
+	return fileDescriptor_messages_b3d89fcb5aa158f8, []int{2}
+}
+func (m *ClientStatsPerToken) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_ClientStatsPerToken.Unmarshal(m, b)
+}
+func (m *ClientStatsPerToken) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_ClientStatsPerToken.Marshal(b, m, deterministic)
+}
+func (dst *ClientStatsPerToken) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_ClientStatsPerToken.Merge(dst, src)
+}
+func (m *ClientStatsPerToken) XXX_Size() int {
+	return xxx_messageInfo_ClientStatsPerToken.Size(m)
+}
+func (m *ClientStatsPerToken) XXX_DiscardUnknown() {
+	xxx_messageInfo_ClientStatsPerToken.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_ClientStatsPerToken proto.InternalMessageInfo
+
+func (m *ClientStatsPerToken) GetLoadBalanceToken() string {
+	if m != nil {
+		return m.LoadBalanceToken
+	}
+	return ""
+}
+
+func (m *ClientStatsPerToken) GetNumCalls() int64 {
+	if m != nil {
+		return m.NumCalls
+	}
+	return 0
+}
+
 // Contains client level statistics that are useful to load balancing. Each
 // count except the timestamp should be reset to zero after reporting the stats.
 type ClientStats struct {
 	// The timestamp of generating the report.
-	Timestamp *Timestamp `protobuf:"bytes,1,opt,name=timestamp" json:"timestamp,omitempty"`
+	Timestamp *timestamp.Timestamp `protobuf:"bytes,1,opt,name=timestamp,proto3" json:"timestamp,omitempty"`
 	// The total number of RPCs that started.
-	NumCallsStarted int64 `protobuf:"varint,2,opt,name=num_calls_started,json=numCallsStarted" json:"num_calls_started,omitempty"`
+	NumCallsStarted int64 `protobuf:"varint,2,opt,name=num_calls_started,json=numCallsStarted,proto3" json:"num_calls_started,omitempty"`
 	// The total number of RPCs that finished.
-	NumCallsFinished int64 `protobuf:"varint,3,opt,name=num_calls_finished,json=numCallsFinished" json:"num_calls_finished,omitempty"`
+	NumCallsFinished int64 `protobuf:"varint,3,opt,name=num_calls_finished,json=numCallsFinished,proto3" json:"num_calls_finished,omitempty"`
-	// The total number of RPCs that were dropped by the client because of rate
-	// limiting.
-	NumCallsFinishedWithDropForRateLimiting int64 `protobuf:"varint,4,opt,name=num_calls_finished_with_drop_for_rate_limiting,json=numCallsFinishedWithDropForRateLimiting" json:"num_calls_finished_with_drop_for_rate_limiting,omitempty"`
-	// The total number of RPCs that were dropped by the client because of load
-	// balancing.
-	NumCallsFinishedWithDropForLoadBalancing int64 `protobuf:"varint,5,opt,name=num_calls_finished_with_drop_for_load_balancing,json=numCallsFinishedWithDropForLoadBalancing" json:"num_calls_finished_with_drop_for_load_balancing,omitempty"`
 	// The total number of RPCs that failed to reach a server except dropped RPCs.
-	NumCallsFinishedWithClientFailedToSend int64 `protobuf:"varint,6,opt,name=num_calls_finished_with_client_failed_to_send,json=numCallsFinishedWithClientFailedToSend" json:"num_calls_finished_with_client_failed_to_send,omitempty"`
+	NumCallsFinishedWithClientFailedToSend int64 `protobuf:"varint,6,opt,name=num_calls_finished_with_client_failed_to_send,json=numCallsFinishedWithClientFailedToSend,proto3" json:"num_calls_finished_with_client_failed_to_send,omitempty"`
 	// The total number of RPCs that finished and are known to have been received
 	// by a server.
-	NumCallsFinishedKnownReceived int64 `protobuf:"varint,7,opt,name=num_calls_finished_known_received,json=numCallsFinishedKnownReceived" json:"num_calls_finished_known_received,omitempty"`
+	NumCallsFinishedKnownReceived int64 `protobuf:"varint,7,opt,name=num_calls_finished_known_received,json=numCallsFinishedKnownReceived,proto3" json:"num_calls_finished_known_received,omitempty"`
+	// The list of dropped calls.
+	CallsFinishedWithDrop []*ClientStatsPerToken `protobuf:"bytes,8,rep,name=calls_finished_with_drop,json=callsFinishedWithDrop,proto3" json:"calls_finished_with_drop,omitempty"`
+	XXX_NoUnkeyedLiteral  struct{}               `json:"-"`
+	XXX_unrecognized      []byte                 `json:"-"`
+	XXX_sizecache         int32                  `json:"-"`
 }
 
 func (m *ClientStats) Reset()         { *m = ClientStats{} }
 func (m *ClientStats) String() string { return proto.CompactTextString(m) }
 func (*ClientStats) ProtoMessage()    {}
-func (*ClientStats) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{4} }
+func (*ClientStats) Descriptor() ([]byte, []int) {
+	return fileDescriptor_messages_b3d89fcb5aa158f8, []int{3}
+}
+func (m *ClientStats) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_ClientStats.Unmarshal(m, b)
+}
+func (m *ClientStats) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_ClientStats.Marshal(b, m, deterministic)
+}
+func (dst *ClientStats) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_ClientStats.Merge(dst, src)
+}
+func (m *ClientStats) XXX_Size() int {
+	return xxx_messageInfo_ClientStats.Size(m)
+}
+func (m *ClientStats) XXX_DiscardUnknown() {
+	xxx_messageInfo_ClientStats.DiscardUnknown(m)
+}
 
-func (m *ClientStats) GetTimestamp() *Timestamp {
+var xxx_messageInfo_ClientStats proto.InternalMessageInfo
+
+func (m *ClientStats) GetTimestamp() *timestamp.Timestamp {
 	if m != nil {
 		return m.Timestamp
 	}
@@ -285,20 +318,6 @@ func (m *ClientStats) GetNumCallsFinished() int64 {
 	return 0
 }
 
-func (m *ClientStats) GetNumCallsFinishedWithDropForRateLimiting() int64 {
-	if m != nil {
-		return m.NumCallsFinishedWithDropForRateLimiting
-	}
-	return 0
-}
-
-func (m *ClientStats) GetNumCallsFinishedWithDropForLoadBalancing() int64 {
-	if m != nil {
-		return m.NumCallsFinishedWithDropForLoadBalancing
-	}
-	return 0
-}
-
 func (m *ClientStats) GetNumCallsFinishedWithClientFailedToSend() int64 {
 	if m != nil {
 		return m.NumCallsFinishedWithClientFailedToSend
@@ -313,27 +332,56 @@ func (m *ClientStats) GetNumCallsFinishedKnownReceived() int64 {
 	return 0
 }
 
+func (m *ClientStats) GetCallsFinishedWithDrop() []*ClientStatsPerToken {
+	if m != nil {
+		return m.CallsFinishedWithDrop
+	}
+	return nil
+}
+
 type LoadBalanceResponse struct {
 	// Types that are valid to be assigned to LoadBalanceResponseType:
 	//	*LoadBalanceResponse_InitialResponse
 	//	*LoadBalanceResponse_ServerList
 	LoadBalanceResponseType isLoadBalanceResponse_LoadBalanceResponseType `protobuf_oneof:"load_balance_response_type"`
+	XXX_NoUnkeyedLiteral    struct{}                                      `json:"-"`
+	XXX_unrecognized        []byte                                        `json:"-"`
+	XXX_sizecache           int32                                         `json:"-"`
 }
 
 func (m *LoadBalanceResponse) Reset()         { *m = LoadBalanceResponse{} }
 func (m *LoadBalanceResponse) String() string { return proto.CompactTextString(m) }
 func (*LoadBalanceResponse) ProtoMessage()    {}
-func (*LoadBalanceResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{5} }
+func (*LoadBalanceResponse) Descriptor() ([]byte, []int) {
+	return fileDescriptor_messages_b3d89fcb5aa158f8, []int{4}
+}
+func (m *LoadBalanceResponse) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_LoadBalanceResponse.Unmarshal(m, b)
+}
+func (m *LoadBalanceResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_LoadBalanceResponse.Marshal(b, m, deterministic)
+}
+func (dst *LoadBalanceResponse) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_LoadBalanceResponse.Merge(dst, src)
+}
+func (m *LoadBalanceResponse) XXX_Size() int {
+	return xxx_messageInfo_LoadBalanceResponse.Size(m)
+}
+func (m *LoadBalanceResponse) XXX_DiscardUnknown() {
+	xxx_messageInfo_LoadBalanceResponse.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_LoadBalanceResponse proto.InternalMessageInfo
 
 type isLoadBalanceResponse_LoadBalanceResponseType interface {
 	isLoadBalanceResponse_LoadBalanceResponseType()
 }
 
 type LoadBalanceResponse_InitialResponse struct {
-	InitialResponse *InitialLoadBalanceResponse `protobuf:"bytes,1,opt,name=initial_response,json=initialResponse,oneof"`
+	InitialResponse *InitialLoadBalanceResponse `protobuf:"bytes,1,opt,name=initial_response,json=initialResponse,proto3,oneof"`
 }
 type LoadBalanceResponse_ServerList struct {
-	ServerList *ServerList `protobuf:"bytes,2,opt,name=server_list,json=serverList,oneof"`
+	ServerList *ServerList `protobuf:"bytes,2,opt,name=server_list,json=serverList,proto3,oneof"`
 }
 
 func (*LoadBalanceResponse_InitialResponse) isLoadBalanceResponse_LoadBalanceResponseType() {}
@@ -419,12 +467,12 @@ func _LoadBalanceResponse_OneofSizer(msg proto.Message) (n int) {
 	switch x := m.LoadBalanceResponseType.(type) {
 	case *LoadBalanceResponse_InitialResponse:
 		s := proto.Size(x.InitialResponse)
-		n += proto.SizeVarint(1<<3 | proto.WireBytes)
+		n += 1 // tag and wire
 		n += proto.SizeVarint(uint64(s))
 		n += s
 	case *LoadBalanceResponse_ServerList:
 		s := proto.Size(x.ServerList)
-		n += proto.SizeVarint(2<<3 | proto.WireBytes)
+		n += 1 // tag and wire
 		n += proto.SizeVarint(uint64(s))
 		n += s
 	case nil:
@@ -440,17 +488,39 @@ type InitialLoadBalanceResponse struct {
 	// the response, the client should open a separate connection to the
 	// load_balancer_delegate and call the BalanceLoad method. Its length should
 	// be less than 64 bytes.
-	LoadBalancerDelegate string `protobuf:"bytes,1,opt,name=load_balancer_delegate,json=loadBalancerDelegate" json:"load_balancer_delegate,omitempty"`
+	LoadBalancerDelegate string `protobuf:"bytes,1,opt,name=load_balancer_delegate,json=loadBalancerDelegate,proto3" json:"load_balancer_delegate,omitempty"`
 	// This interval defines how often the client should send the client stats
 	// to the load balancer. Stats should only be reported when the duration is
 	// positive.
-	ClientStatsReportInterval *Duration `protobuf:"bytes,2,opt,name=client_stats_report_interval,json=clientStatsReportInterval" json:"client_stats_report_interval,omitempty"`
+	ClientStatsReportInterval *duration.Duration `protobuf:"bytes,2,opt,name=client_stats_report_interval,json=clientStatsReportInterval,proto3" json:"client_stats_report_interval,omitempty"`
+	XXX_NoUnkeyedLiteral      struct{}           `json:"-"`
+	XXX_unrecognized          []byte             `json:"-"`
+	XXX_sizecache             int32              `json:"-"`
 }
 
 func (m *InitialLoadBalanceResponse) Reset()         { *m = InitialLoadBalanceResponse{} }
 func (m *InitialLoadBalanceResponse) String() string { return proto.CompactTextString(m) }
 func (*InitialLoadBalanceResponse) ProtoMessage()    {}
-func (*InitialLoadBalanceResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{6} }
+func (*InitialLoadBalanceResponse) Descriptor() ([]byte, []int) {
+	return fileDescriptor_messages_b3d89fcb5aa158f8, []int{5}
+}
+func (m *InitialLoadBalanceResponse) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_InitialLoadBalanceResponse.Unmarshal(m, b)
+}
+func (m *InitialLoadBalanceResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_InitialLoadBalanceResponse.Marshal(b, m, deterministic)
+}
+func (dst *InitialLoadBalanceResponse) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_InitialLoadBalanceResponse.Merge(dst, src)
+}
+func (m *InitialLoadBalanceResponse) XXX_Size() int {
+	return xxx_messageInfo_InitialLoadBalanceResponse.Size(m)
+}
+func (m *InitialLoadBalanceResponse) XXX_DiscardUnknown() {
+	xxx_messageInfo_InitialLoadBalanceResponse.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_InitialLoadBalanceResponse proto.InternalMessageInfo
 
 func (m *InitialLoadBalanceResponse) GetLoadBalancerDelegate() string {
 	if m != nil {
@@ -459,7 +529,7 @@ func (m *InitialLoadBalanceResponse) GetLoadBalancerDelegate() string {
 	return ""
 }
 
-func (m *InitialLoadBalanceResponse) GetClientStatsReportInterval() *Duration {
+func (m *InitialLoadBalanceResponse) GetClientStatsReportInterval() *duration.Duration {
 	if m != nil {
 		return m.ClientStatsReportInterval
 	}
@@ -471,13 +541,35 @@ type ServerList struct {
 	// be updated when server resolutions change or as needed to balance load
 	// across more servers. The client should consume the server list in order
 	// unless instructed otherwise via the client_config.
-	Servers []*Server `protobuf:"bytes,1,rep,name=servers" json:"servers,omitempty"`
+	Servers              []*Server `protobuf:"bytes,1,rep,name=servers,proto3" json:"servers,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}  `json:"-"`
+	XXX_unrecognized     []byte    `json:"-"`
+	XXX_sizecache        int32     `json:"-"`
 }
 
 func (m *ServerList) Reset()         { *m = ServerList{} }
 func (m *ServerList) String() string { return proto.CompactTextString(m) }
 func (*ServerList) ProtoMessage()    {}
-func (*ServerList) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{7} }
+func (*ServerList) Descriptor() ([]byte, []int) {
+	return fileDescriptor_messages_b3d89fcb5aa158f8, []int{6}
+}
+func (m *ServerList) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_ServerList.Unmarshal(m, b)
+}
+func (m *ServerList) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_ServerList.Marshal(b, m, deterministic)
+}
+func (dst *ServerList) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_ServerList.Merge(dst, src)
+}
+func (m *ServerList) XXX_Size() int {
+	return xxx_messageInfo_ServerList.Size(m)
+}
+func (m *ServerList) XXX_DiscardUnknown() {
+	xxx_messageInfo_ServerList.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_ServerList proto.InternalMessageInfo
 
 func (m *ServerList) GetServers() []*Server {
 	if m != nil {
@@ -486,35 +578,52 @@ func (m *ServerList) GetServers() []*Server {
 	return nil
 }
 
-// Contains server information. When none of the [drop_for_*] fields are true,
+// Contains server information. When the drop field is not true, use the other
-// use the other fields. When drop_for_rate_limiting is true, ignore all other
+// fields.
-// fields. Use drop_for_load_balancing only when it is true and
-// drop_for_rate_limiting is false.
 type Server struct {
 	// A resolved address for the server, serialized in network-byte-order. It may
 	// either be an IPv4 or IPv6 address.
 	IpAddress []byte `protobuf:"bytes,1,opt,name=ip_address,json=ipAddress,proto3" json:"ip_address,omitempty"`
 	// A resolved port number for the server.
-	Port int32 `protobuf:"varint,2,opt,name=port" json:"port,omitempty"`
+	Port int32 `protobuf:"varint,2,opt,name=port,proto3" json:"port,omitempty"`
 	// An opaque but printable token given to the frontend for each pick. All
 	// frontend requests for that pick must include the token in its initial
 	// metadata. The token is used by the backend to verify the request and to
-	// allow the backend to report load to the gRPC LB system.
+	// allow the backend to report load to the gRPC LB system. The token is also
-	//
+	// used in client stats for reporting dropped calls.
-	// Its length is variable but less than 50 bytes.
+	LoadBalanceToken string `protobuf:"bytes,3,opt,name=load_balance_token,json=loadBalanceToken,proto3" json:"load_balance_token,omitempty"`
-	LoadBalanceToken string `protobuf:"bytes,3,opt,name=load_balance_token,json=loadBalanceToken" json:"load_balance_token,omitempty"`
+	// Indicates whether this particular request should be dropped by the client.
-	// Indicates whether this particular request should be dropped by the client
+	// If the request is dropped, there will be a corresponding entry in
-	// for rate limiting.
+	// ClientStats.calls_finished_with_drop.
-	DropForRateLimiting bool `protobuf:"varint,4,opt,name=drop_for_rate_limiting,json=dropForRateLimiting" json:"drop_for_rate_limiting,omitempty"`
+	Drop                 bool     `protobuf:"varint,4,opt,name=drop,proto3" json:"drop,omitempty"`
-	// Indicates whether this particular request should be dropped by the client
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
-	// for load balancing.
+	XXX_unrecognized     []byte   `json:"-"`
-	DropForLoadBalancing bool `protobuf:"varint,5,opt,name=drop_for_load_balancing,json=dropForLoadBalancing" json:"drop_for_load_balancing,omitempty"`
+	XXX_sizecache        int32    `json:"-"`
 }
 
 func (m *Server) Reset()         { *m = Server{} }
 func (m *Server) String() string { return proto.CompactTextString(m) }
 func (*Server) ProtoMessage()    {}
-func (*Server) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{8} }
+func (*Server) Descriptor() ([]byte, []int) {
+	return fileDescriptor_messages_b3d89fcb5aa158f8, []int{7}
+}
+func (m *Server) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Server.Unmarshal(m, b)
+}
+func (m *Server) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Server.Marshal(b, m, deterministic)
+}
+func (dst *Server) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Server.Merge(dst, src)
+}
+func (m *Server) XXX_Size() int {
+	return xxx_messageInfo_Server.Size(m)
+}
+func (m *Server) XXX_DiscardUnknown() {
+	xxx_messageInfo_Server.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Server proto.InternalMessageInfo
 
 func (m *Server) GetIpAddress() []byte {
 	if m != nil {
@@ -537,25 +646,17 @@ func (m *Server) GetLoadBalanceToken() string {
 	return ""
 }
 
-func (m *Server) GetDropForRateLimiting() bool {
+func (m *Server) GetDrop() bool {
 	if m != nil {
-		return m.DropForRateLimiting
+		return m.Drop
-	}
-	return false
-}
-
-func (m *Server) GetDropForLoadBalancing() bool {
-	if m != nil {
-		return m.DropForLoadBalancing
 	}
 	return false
 }
 
 func init() {
-	proto.RegisterType((*Duration)(nil), "grpc.lb.v1.Duration")
-	proto.RegisterType((*Timestamp)(nil), "grpc.lb.v1.Timestamp")
 	proto.RegisterType((*LoadBalanceRequest)(nil), "grpc.lb.v1.LoadBalanceRequest")
 	proto.RegisterType((*InitialLoadBalanceRequest)(nil), "grpc.lb.v1.InitialLoadBalanceRequest")
+	proto.RegisterType((*ClientStatsPerToken)(nil), "grpc.lb.v1.ClientStatsPerToken")
 	proto.RegisterType((*ClientStats)(nil), "grpc.lb.v1.ClientStats")
 	proto.RegisterType((*LoadBalanceResponse)(nil), "grpc.lb.v1.LoadBalanceResponse")
 	proto.RegisterType((*InitialLoadBalanceResponse)(nil), "grpc.lb.v1.InitialLoadBalanceResponse")
@@ -563,53 +664,55 @@ func init() {
 	proto.RegisterType((*Server)(nil), "grpc.lb.v1.Server")
 }
 
-func init() { proto.RegisterFile("grpc_lb_v1/messages/messages.proto", fileDescriptor0) }
+func init() {
-
+	proto.RegisterFile("grpc_lb_v1/messages/messages.proto", fileDescriptor_messages_b3d89fcb5aa158f8)
-var fileDescriptor0 = []byte{
+}
-	// 709 bytes of a gzipped FileDescriptorProto
+
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x94, 0x55, 0xdd, 0x4e, 0x1b, 0x3b,
+var fileDescriptor_messages_b3d89fcb5aa158f8 = []byte{
-	0x10, 0x26, 0x27, 0x01, 0x92, 0x09, 0x3a, 0xe4, 0x98, 0x1c, 0x08, 0x14, 0x24, 0xba, 0x52, 0x69,
+	// 708 bytes of a gzipped FileDescriptorProto
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+	0x05, 0xe9, 0xf7, 0xd0, 0xd2, 0x54, 0xcd, 0xa8, 0xc2, 0x9c, 0x69, 0x53, 0x88, 0x61, 0xa7, 0xca,
-	0xa9, 0x2d, 0xea, 0x41, 0x96, 0xa4, 0x0f, 0x93, 0x33, 0xf2, 0x11, 0xd6, 0xf3, 0x96, 0x65, 0x1a,
+	0x37, 0xb4, 0xee, 0x5b, 0x66, 0xc5, 0x04, 0x7a, 0xfe, 0xd7, 0xdf, 0x83, 0xee, 0x92, 0x14, 0x1c,
-	0x43, 0xa5, 0x2d, 0x13, 0xd2, 0xa2, 0x1e, 0xf3, 0x20, 0x29, 0xbf, 0x9e, 0x2f, 0x3f, 0x1d, 0x62,
+	0xa7, 0xd3, 0xc2, 0xdf, 0x1e, 0x74, 0xd7, 0x97, 0x82, 0xbe, 0x85, 0x9d, 0x6a, 0xb0, 0xc2, 0x09,
-	0x74, 0x35, 0xe7, 0x5e, 0xea, 0xf2, 0x8e, 0x93, 0x34, 0xef, 0x0d, 0x40, 0x76, 0x4b, 0xb2, 0x1d,
+	0xe5, 0x34, 0x25, 0xa6, 0xd4, 0xc7, 0xa7, 0x95, 0x35, 0x57, 0x97, 0x85, 0x0f, 0x3d, 0xc0, 0x5e,
-	0x0d, 0xac, 0x68, 0x17, 0x0d, 0xac, 0x62, 0xb3, 0xba, 0x47, 0x6e, 0xb6, 0x83, 0xa6, 0x90, 0x77,
+	0x55, 0xbb, 0x58, 0xd1, 0x4c, 0x2a, 0x83, 0x99, 0x30, 0x54, 0xcd, 0x08, 0x2f, 0xca, 0xef, 0xac,
-	0xa5, 0x72, 0xb1, 0x56, 0xf2, 0x7e, 0x17, 0x60, 0x2e, 0x3e, 0x21, 0x1b, 0x00, 0x22, 0x64, 0xdc,
+	0x2c, 0xf4, 0x65, 0xf1, 0x18, 0xc5, 0x9d, 0x8a, 0x96, 0x63, 0x1b, 0x7c, 0x5d, 0xc4, 0x86, 0x3f,
-	0xf7, 0x35, 0x9a, 0x78, 0xe4, 0x2d, 0xd0, 0x8a, 0x08, 0xdf, 0xc6, 0x81, 0xc8, 0xfd, 0x91, 0x76,
+	0x02, 0x2c, 0x5a, 0x45, 0x27, 0xf0, 0xce, 0xb5, 0xaa, 0x03, 0xcf, 0x4e, 0x16, 0xad, 0xde, 0x49,
-	0x32, 0xf3, 0xdc, 0x3a, 0x32, 0xe3, 0x95, 0x4e, 0x5a, 0x75, 0x81, 0xd2, 0x99, 0xb1, 0x42, 0x6b,
+	0x5c, 0x42, 0x6e, 0xfc, 0x46, 0xad, 0xed, 0x87, 0x7f, 0x79, 0x50, 0x77, 0x1e, 0xb4, 0x0f, 0xc0,
-	0xb9, 0x46, 0x9c, 0x46, 0x71, 0xb2, 0x0f, 0xcb, 0x77, 0x98, 0xae, 0x4c, 0x97, 0xfc, 0x29, 0x06,
+	0x32, 0x4c, 0x92, 0x44, 0x51, 0xad, 0x6d, 0x4b, 0xef, 0xe3, 0x26, 0xcb, 0x7e, 0x72, 0x86, 0xfc,
-	0x7b, 0x0e, 0x2b, 0x77, 0x19, 0xa9, 0x4c, 0xeb, 0xfe, 0x14, 0xd3, 0xb4, 0xe1, 0x73, 0x39, 0xfd,
+	0x2d, 0xc8, 0x73, 0xdb, 0x7a, 0x37, 0x63, 0x7b, 0x5e, 0x23, 0xfa, 0xda, 0x1a, 0xd1, 0x23, 0xf0,
-	0x47, 0xf4, 0xe6, 0xdc, 0x4f, 0x62, 0xff, 0x4f, 0x00, 0x00, 0x00, 0xff, 0xff, 0xa3, 0x36, 0x86,
+	0xed, 0xda, 0xf9, 0x87, 0xde, 0x71, 0x23, 0xb6, 0x67, 0xb7, 0x3e, 0xfd, 0xf3, 0x87, 0xd3, 0xa2,
-	0xa6, 0x4a, 0x06, 0x00, 0x00,
+	0xfd, 0x54, 0x72, 0x22, 0xd2, 0x48, 0xaa, 0xb4, 0x97, 0xd7, 0x6e, 0x3f, 0x7c, 0xd4, 0x7b, 0xe3,
+	0x65, 0x1f, 0xd5, 0xed, 0x55, 0x9d, 0xff, 0x1f, 0x00, 0x00, 0xff, 0xff, 0xc8, 0x88, 0xe6, 0xf4,
+	0xf7, 0x05, 0x00, 0x00,
 }

vendor/google.golang.org/grpc/grpclb/grpc_lb_v1/messages/messages.proto

@@ -14,35 +14,11 @@
 
 syntax = "proto3";
 
+import "google/protobuf/duration.proto";
+import "google/protobuf/timestamp.proto";
+
 package grpc.lb.v1;
-option go_package = "messages";
+option go_package = "google.golang.org/grpc/grpclb/grpc_lb_v1/messages";
-
-message Duration {
-  // Signed seconds of the span of time. Must be from -315,576,000,000
-  // to +315,576,000,000 inclusive.
-  int64 seconds = 1;
-
-  // Signed fractions of a second at nanosecond resolution of the span
-  // of time. Durations less than one second are represented with a 0
-  // `seconds` field and a positive or negative `nanos` field. For durations
-  // of one second or more, a non-zero value for the `nanos` field must be
-  // of the same sign as the `seconds` field. Must be from -999,999,999
-  // to +999,999,999 inclusive.
-  int32 nanos = 2;
-}
-
-message Timestamp {
-  // Represents seconds of UTC time since Unix epoch
-  // 1970-01-01T00:00:00Z. Must be from 0001-01-01T00:00:00Z to
-  // 9999-12-31T23:59:59Z inclusive.
-  int64 seconds = 1;
-
-  // Non-negative fractions of a second at nanosecond resolution. Negative
-  // second values with fractions must still have non-negative nanos values
-  // that count forward in time. Must be from 0 to 999,999,999
-  // inclusive.
-  int32 nanos = 2;
-}
 
 message LoadBalanceRequest {
   oneof load_balance_request_type {
@@ -56,16 +32,25 @@ message LoadBalanceRequest {
 }
 
 message InitialLoadBalanceRequest {
-  // Name of load balanced service (IE, balancer.service.com)
+  // Name of load balanced service (IE, balancer.service.com). Its
   // length should be less than 256 bytes.
   string name = 1;
 }
 
+// Contains the number of calls finished for a particular load balance token.
+message ClientStatsPerToken {
+  // See Server.load_balance_token.
+  string load_balance_token = 1;
+
+  // The total number of RPCs that finished associated with the token.
+  int64 num_calls = 2;
+}
+
 // Contains client level statistics that are useful to load balancing. Each
 // count except the timestamp should be reset to zero after reporting the stats.
 message ClientStats {
   // The timestamp of generating the report.
-  Timestamp timestamp = 1;
+  google.protobuf.Timestamp timestamp = 1;
 
   // The total number of RPCs that started.
   int64 num_calls_started = 2;
@@ -73,20 +58,17 @@ message ClientStats {
   // The total number of RPCs that finished.
   int64 num_calls_finished = 3;
 
-  // The total number of RPCs that were dropped by the client because of rate
-  // limiting.
-  int64 num_calls_finished_with_drop_for_rate_limiting = 4;
-
-  // The total number of RPCs that were dropped by the client because of load
-  // balancing.
-  int64 num_calls_finished_with_drop_for_load_balancing = 5;
-
   // The total number of RPCs that failed to reach a server except dropped RPCs.
   int64 num_calls_finished_with_client_failed_to_send = 6;
 
   // The total number of RPCs that finished and are known to have been received
   // by a server.
   int64 num_calls_finished_known_received = 7;
+
+  // The list of dropped calls.
+  repeated ClientStatsPerToken calls_finished_with_drop = 8;
+
+  reserved 4, 5;
 }
 
 message LoadBalanceResponse {
@@ -111,7 +93,7 @@ message InitialLoadBalanceResponse {
   // This interval defines how often the client should send the client stats
   // to the load balancer. Stats should only be reported when the duration is
   // positive.
-  Duration client_stats_report_interval = 2;
+  google.protobuf.Duration client_stats_report_interval = 2;
 }
 
 message ServerList {
@@ -125,10 +107,8 @@ message ServerList {
   reserved 3;
 }
 
-// Contains server information. When none of the [drop_for_*] fields are true,
+// Contains server information. When the drop field is not true, use the other
-// use the other fields. When drop_for_rate_limiting is true, ignore all other
+// fields.
-// fields. Use drop_for_load_balancing only when it is true and
-// drop_for_rate_limiting is false.
 message Server {
   // A resolved address for the server, serialized in network-byte-order. It may
   // either be an IPv4 or IPv6 address.
@@ -140,16 +120,14 @@ message Server {
   // An opaque but printable token given to the frontend for each pick. All
   // frontend requests for that pick must include the token in its initial
   // metadata. The token is used by the backend to verify the request and to
-  // allow the backend to report load to the gRPC LB system.
+  // allow the backend to report load to the gRPC LB system. The token is also
-  //
+  // used in client stats for reporting dropped calls.
-  // Its length is variable but less than 50 bytes.
   string load_balance_token = 3;
 
-  // Indicates whether this particular request should be dropped by the client
+  // Indicates whether this particular request should be dropped by the client.
-  // for rate limiting.
+  // If the request is dropped, there will be a corresponding entry in
-  bool drop_for_rate_limiting = 4;
+  // ClientStats.calls_finished_with_drop.
+  bool drop = 4;
 
-  // Indicates whether this particular request should be dropped by the client
+  reserved 5;
-  // for load balancing.
-  bool drop_for_load_balancing = 5;
 }

vendor/google.golang.org/grpc/grpclog/grpclog.go

@@ -105,18 +105,21 @@ func Fatalln(args ...interface{}) {
 }
 
 // Print prints to the logger. Arguments are handled in the manner of fmt.Print.
+//
 // Deprecated: use Info.
 func Print(args ...interface{}) {
 	logger.Info(args...)
 }
 
 // Printf prints to the logger. Arguments are handled in the manner of fmt.Printf.
+//
 // Deprecated: use Infof.
 func Printf(format string, args ...interface{}) {
 	logger.Infof(format, args...)
 }
 
 // Println prints to the logger. Arguments are handled in the manner of fmt.Println.
+//
 // Deprecated: use Infoln.
 func Println(args ...interface{}) {
 	logger.Infoln(args...)

vendor/google.golang.org/grpc/grpclog/logger.go

@@ -19,6 +19,7 @@
 package grpclog
 
 // Logger mimics golang's standard Logger as an interface.
+//
 // Deprecated: use LoggerV2.
 type Logger interface {
 	Fatal(args ...interface{})
@@ -31,6 +32,7 @@ type Logger interface {
 
 // SetLogger sets the logger that is used in grpc. Call only from
 // init() functions.
+//
 // Deprecated: use SetLoggerV2.
 func SetLogger(l Logger) {
 	logger = &loggerWrapper{Logger: l}

vendor/google.golang.org/grpc/health/BUILD

@@ -8,9 +8,9 @@ go_library(
     visibility = ["//visibility:public"],
     deps = [
         "//vendor/golang.org/x/net/context:go_default_library",
-        "//vendor/google.golang.org/grpc:go_default_library",
         "//vendor/google.golang.org/grpc/codes:go_default_library",
         "//vendor/google.golang.org/grpc/health/grpc_health_v1:go_default_library",
+        "//vendor/google.golang.org/grpc/status:go_default_library",
     ],
 )
 

vendor/google.golang.org/grpc/health/grpc_health_v1/health.pb.go

@@ -1,16 +1,6 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
-// source: grpc_health_v1/health.proto
+// source: grpc/health/v1/health.proto
 
-/*
-Package grpc_health_v1 is a generated protocol buffer package.
-
-It is generated from these files:
-	grpc_health_v1/health.proto
-
-It has these top-level messages:
-	HealthCheckRequest
-	HealthCheckResponse
-*/
 package grpc_health_v1
 
 import proto "github.com/golang/protobuf/proto"
@@ -56,17 +46,39 @@ func (x HealthCheckResponse_ServingStatus) String() string {
 	return proto.EnumName(HealthCheckResponse_ServingStatus_name, int32(x))
 }
 func (HealthCheckResponse_ServingStatus) EnumDescriptor() ([]byte, []int) {
-	return fileDescriptor0, []int{1, 0}
+	return fileDescriptor_health_85731b6c49265086, []int{1, 0}
 }
 
 type HealthCheckRequest struct {
-	Service string `protobuf:"bytes,1,opt,name=service" json:"service,omitempty"`
+	Service              string   `protobuf:"bytes,1,opt,name=service,proto3" json:"service,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
 }
 
 func (m *HealthCheckRequest) Reset()         { *m = HealthCheckRequest{} }
 func (m *HealthCheckRequest) String() string { return proto.CompactTextString(m) }
 func (*HealthCheckRequest) ProtoMessage()    {}
-func (*HealthCheckRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{0} }
+func (*HealthCheckRequest) Descriptor() ([]byte, []int) {
+	return fileDescriptor_health_85731b6c49265086, []int{0}
+}
+func (m *HealthCheckRequest) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_HealthCheckRequest.Unmarshal(m, b)
+}
+func (m *HealthCheckRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_HealthCheckRequest.Marshal(b, m, deterministic)
+}
+func (dst *HealthCheckRequest) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_HealthCheckRequest.Merge(dst, src)
+}
+func (m *HealthCheckRequest) XXX_Size() int {
+	return xxx_messageInfo_HealthCheckRequest.Size(m)
+}
+func (m *HealthCheckRequest) XXX_DiscardUnknown() {
+	xxx_messageInfo_HealthCheckRequest.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_HealthCheckRequest proto.InternalMessageInfo
 
 func (m *HealthCheckRequest) GetService() string {
 	if m != nil {
@@ -76,13 +88,35 @@ func (m *HealthCheckRequest) GetService() string {
 }
 
 type HealthCheckResponse struct {
-	Status HealthCheckResponse_ServingStatus `protobuf:"varint,1,opt,name=status,enum=grpc.health.v1.HealthCheckResponse_ServingStatus" json:"status,omitempty"`
+	Status               HealthCheckResponse_ServingStatus `protobuf:"varint,1,opt,name=status,proto3,enum=grpc.health.v1.HealthCheckResponse_ServingStatus" json:"status,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}                          `json:"-"`
+	XXX_unrecognized     []byte                            `json:"-"`
+	XXX_sizecache        int32                             `json:"-"`
 }
 
 func (m *HealthCheckResponse) Reset()         { *m = HealthCheckResponse{} }
 func (m *HealthCheckResponse) String() string { return proto.CompactTextString(m) }
 func (*HealthCheckResponse) ProtoMessage()    {}
-func (*HealthCheckResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{1} }
+func (*HealthCheckResponse) Descriptor() ([]byte, []int) {
+	return fileDescriptor_health_85731b6c49265086, []int{1}
+}
+func (m *HealthCheckResponse) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_HealthCheckResponse.Unmarshal(m, b)
+}
+func (m *HealthCheckResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_HealthCheckResponse.Marshal(b, m, deterministic)
+}
+func (dst *HealthCheckResponse) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_HealthCheckResponse.Merge(dst, src)
+}
+func (m *HealthCheckResponse) XXX_Size() int {
+	return xxx_messageInfo_HealthCheckResponse.Size(m)
+}
+func (m *HealthCheckResponse) XXX_DiscardUnknown() {
+	xxx_messageInfo_HealthCheckResponse.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_HealthCheckResponse proto.InternalMessageInfo
 
 func (m *HealthCheckResponse) GetStatus() HealthCheckResponse_ServingStatus {
 	if m != nil {
@@ -105,8 +139,9 @@ var _ grpc.ClientConn
 // is compatible with the grpc package it is being compiled against.
 const _ = grpc.SupportPackageIsVersion4
 
-// Client API for Health service
+// HealthClient is the client API for Health service.
-
+//
+// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://godoc.org/google.golang.org/grpc#ClientConn.NewStream.
 type HealthClient interface {
 	Check(ctx context.Context, in *HealthCheckRequest, opts ...grpc.CallOption) (*HealthCheckResponse, error)
 }
@@ -121,15 +156,14 @@ func NewHealthClient(cc *grpc.ClientConn) HealthClient {
 
 func (c *healthClient) Check(ctx context.Context, in *HealthCheckRequest, opts ...grpc.CallOption) (*HealthCheckResponse, error) {
 	out := new(HealthCheckResponse)
-	err := grpc.Invoke(ctx, "/grpc.health.v1.Health/Check", in, out, c.cc, opts...)
+	err := c.cc.Invoke(ctx, "/grpc.health.v1.Health/Check", in, out, opts...)
 	if err != nil {
 		return nil, err
 	}
 	return out, nil
 }
 
-// Server API for Health service
+// HealthServer is the server API for Health service.
-
 type HealthServer interface {
 	Check(context.Context, *HealthCheckRequest) (*HealthCheckResponse, error)
 }
@@ -166,25 +200,28 @@ var _Health_serviceDesc = grpc.ServiceDesc{
 		},
 	},
 	Streams:  []grpc.StreamDesc{},
-	Metadata: "grpc_health_v1/health.proto",
+	Metadata: "grpc/health/v1/health.proto",
 }
 
-func init() { proto.RegisterFile("grpc_health_v1/health.proto", fileDescriptor0) }
+func init() { proto.RegisterFile("grpc/health/v1/health.proto", fileDescriptor_health_85731b6c49265086) }
 
-var fileDescriptor0 = []byte{
+var fileDescriptor_health_85731b6c49265086 = []byte{
-	// 213 bytes of a gzipped FileDescriptorProto
+	// 271 bytes of a gzipped FileDescriptorProto
 	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xe2, 0x92, 0x4e, 0x2f, 0x2a, 0x48,
-	0x8e, 0xcf, 0x48, 0x4d, 0xcc, 0x29, 0xc9, 0x88, 0x2f, 0x33, 0xd4, 0x87, 0xb0, 0xf4, 0x0a, 0x8a,
+	0xd6, 0xcf, 0x48, 0x4d, 0xcc, 0x29, 0xc9, 0xd0, 0x2f, 0x33, 0x84, 0xb2, 0xf4, 0x0a, 0x8a, 0xf2,
-	0xf2, 0x4b, 0xf2, 0x85, 0xf8, 0x40, 0x92, 0x7a, 0x50, 0xa1, 0x32, 0x43, 0x25, 0x3d, 0x2e, 0x21,
+	0x4b, 0xf2, 0x85, 0xf8, 0x40, 0x92, 0x7a, 0x50, 0xa1, 0x32, 0x43, 0x25, 0x3d, 0x2e, 0x21, 0x0f,
-	0x0f, 0x30, 0xc7, 0x39, 0x23, 0x35, 0x39, 0x3b, 0x28, 0xb5, 0xb0, 0x34, 0xb5, 0xb8, 0x44, 0x48,
+	0x30, 0xc7, 0x39, 0x23, 0x35, 0x39, 0x3b, 0x28, 0xb5, 0xb0, 0x34, 0xb5, 0xb8, 0x44, 0x48, 0x82,
-	0x82, 0x8b, 0xbd, 0x38, 0xb5, 0xa8, 0x2c, 0x33, 0x39, 0x55, 0x82, 0x51, 0x81, 0x51, 0x83, 0x33,
+	0x8b, 0xbd, 0x38, 0xb5, 0xa8, 0x2c, 0x33, 0x39, 0x55, 0x82, 0x51, 0x81, 0x51, 0x83, 0x33, 0x08,
-	0x08, 0xc6, 0x55, 0x9a, 0xc3, 0xc8, 0x25, 0x8c, 0xa2, 0xa1, 0xb8, 0x20, 0x3f, 0xaf, 0x38, 0x55,
+	0xc6, 0x55, 0x9a, 0xc3, 0xc8, 0x25, 0x8c, 0xa2, 0xa1, 0xb8, 0x20, 0x3f, 0xaf, 0x38, 0x55, 0xc8,
-	0xc8, 0x93, 0x8b, 0xad, 0xb8, 0x24, 0xb1, 0xa4, 0xb4, 0x18, 0xac, 0x81, 0xcf, 0xc8, 0x50, 0x0f,
+	0x93, 0x8b, 0xad, 0xb8, 0x24, 0xb1, 0xa4, 0xb4, 0x18, 0xac, 0x81, 0xcf, 0xc8, 0x50, 0x0f, 0xd5,
-	0xd5, 0x22, 0x3d, 0x2c, 0x9a, 0xf4, 0x82, 0x41, 0x86, 0xe6, 0xa5, 0x07, 0x83, 0x35, 0x06, 0x41,
+	0x22, 0x3d, 0x2c, 0x9a, 0xf4, 0x82, 0x41, 0x86, 0xe6, 0xa5, 0x07, 0x83, 0x35, 0x06, 0x41, 0x0d,
-	0x0d, 0x50, 0xb2, 0xe2, 0xe2, 0x45, 0x91, 0x10, 0xe2, 0xe6, 0x62, 0x0f, 0xf5, 0xf3, 0xf6, 0xf3,
+	0x50, 0xb2, 0xe2, 0xe2, 0x45, 0x91, 0x10, 0xe2, 0xe6, 0x62, 0x0f, 0xf5, 0xf3, 0xf6, 0xf3, 0x0f,
-	0x0f, 0xf7, 0x13, 0x60, 0x00, 0x71, 0x82, 0x5d, 0x83, 0xc2, 0x3c, 0xfd, 0xdc, 0x05, 0x18, 0x85,
+	0xf7, 0x13, 0x60, 0x00, 0x71, 0x82, 0x5d, 0x83, 0xc2, 0x3c, 0xfd, 0xdc, 0x05, 0x18, 0x85, 0xf8,
-	0xf8, 0xb9, 0xb8, 0xfd, 0xfc, 0x43, 0xe2, 0x61, 0x02, 0x4c, 0x46, 0x51, 0x5c, 0x6c, 0x10, 0x8b,
+	0xb9, 0xb8, 0xfd, 0xfc, 0x43, 0xe2, 0x61, 0x02, 0x4c, 0x46, 0x51, 0x5c, 0x6c, 0x10, 0x8b, 0x84,
-	0x84, 0x02, 0xb8, 0x58, 0xc1, 0x96, 0x09, 0x29, 0xe1, 0x75, 0x09, 0xd8, 0xbf, 0x52, 0xca, 0x44,
+	0x02, 0xb8, 0x58, 0xc1, 0x96, 0x09, 0x29, 0xe1, 0x75, 0x09, 0xd8, 0xbf, 0x52, 0xca, 0x44, 0xb8,
-	0xb8, 0x36, 0x89, 0x0d, 0x1c, 0x82, 0xc6, 0x80, 0x00, 0x00, 0x00, 0xff, 0xff, 0x53, 0x2b, 0x65,
+	0xd6, 0x29, 0x91, 0x4b, 0x30, 0x33, 0x1f, 0x4d, 0xa1, 0x13, 0x37, 0x44, 0x65, 0x00, 0x28, 0x70,
-	0x20, 0x60, 0x01, 0x00, 0x00,
+	0x03, 0x18, 0xa3, 0x74, 0xd2, 0xf3, 0xf3, 0xd3, 0x73, 0x52, 0xf5, 0xd2, 0xf3, 0x73, 0x12, 0xf3,
+	0xd2, 0xf5, 0xf2, 0x8b, 0xd2, 0xf5, 0x91, 0x63, 0x03, 0xc4, 0x8e, 0x87, 0xb0, 0xe3, 0xcb, 0x0c,
+	0x57, 0x31, 0xf1, 0xb9, 0x83, 0x4c, 0x83, 0x18, 0xa1, 0x17, 0x66, 0x98, 0xc4, 0x06, 0x8e, 0x24,
+	0x63, 0x40, 0x00, 0x00, 0x00, 0xff, 0xff, 0xec, 0x66, 0x81, 0xcb, 0xc3, 0x01, 0x00, 0x00,
 }

vendor/google.golang.org/grpc/health/grpc_health_v1/health.proto

@@ -1,34 +0,0 @@
-// Copyright 2017 gRPC authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-syntax = "proto3";
-
-package grpc.health.v1;
-
-message HealthCheckRequest {
-  string service = 1;
-}
-
-message HealthCheckResponse {
-  enum ServingStatus {
- 	UNKNOWN = 0;
-	SERVING = 1;
-	NOT_SERVING = 2;
-  }
-  ServingStatus status = 1;
-}
-
-service Health{
-  rpc Check(HealthCheckRequest) returns (HealthCheckResponse);
-} 

vendor/google.golang.org/grpc/health/health.go

@@ -16,7 +16,7 @@
  *
  */
 
-//go:generate protoc --go_out=plugins=grpc:. grpc_health_v1/health.proto
+//go:generate ./regenerate.sh
 
 // Package health provides some utility functions to health-check a server. The implementation
 // is based on protobuf. Users need to write their own implementations if other IDLs are used.
@@ -26,9 +26,9 @@ import (
 	"sync"
 
 	"golang.org/x/net/context"
-	"google.golang.org/grpc"
 	"google.golang.org/grpc/codes"
 	healthpb "google.golang.org/grpc/health/grpc_health_v1"
+	"google.golang.org/grpc/status"
 )
 
 // Server implements `service Health`.
@@ -60,7 +60,7 @@ func (s *Server) Check(ctx context.Context, in *healthpb.HealthCheckRequest) (*h
 			Status: status,
 		}, nil
 	}
-	return nil, grpc.Errorf(codes.NotFound, "unknown service")
+	return nil, status.Error(codes.NotFound, "unknown service")
 }
 
 // SetServingStatus is called when need to reset the serving status of a service

vendor/google.golang.org/grpc/health/regenerate.sh

@@ -0,0 +1,33 @@
+#!/bin/bash
+# Copyright 2018 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+set -eux -o pipefail
+
+TMP=$(mktemp -d)
+
+function finish {
+  rm -rf "$TMP"
+}
+trap finish EXIT
+
+pushd "$TMP"
+mkdir -p grpc/health/v1
+curl https://raw.githubusercontent.com/grpc/grpc-proto/master/grpc/health/v1/health.proto > grpc/health/v1/health.proto
+
+protoc --go_out=plugins=grpc,paths=source_relative:. -I. grpc/health/v1/*.proto
+popd
+rm -f grpc_health_v1/*.pb.go
+cp "$TMP"/grpc/health/v1/*.pb.go grpc_health_v1/
+

vendor/google.golang.org/grpc/interceptor.go

@@ -48,7 +48,9 @@ type UnaryServerInfo struct {
 }
 
 // UnaryHandler defines the handler invoked by UnaryServerInterceptor to complete the normal
-// execution of a unary RPC.
+// execution of a unary RPC. If a UnaryHandler returns an error, it should be produced by the
+// status package, or else gRPC will use codes.Unknown as the status code and err.Error() as
+// the status message of the RPC.
 type UnaryHandler func(ctx context.Context, req interface{}) (interface{}, error)
 
 // UnaryServerInterceptor provides a hook to intercept the execution of a unary RPC on the server. info

vendor/google.golang.org/grpc/internal/BUILD

@@ -17,7 +17,12 @@ filegroup(
 
 filegroup(
     name = "all-srcs",
-    srcs = [":package-srcs"],
+    srcs = [
+        ":package-srcs",
+        "//vendor/google.golang.org/grpc/internal/backoff:all-srcs",
+        "//vendor/google.golang.org/grpc/internal/channelz:all-srcs",
+        "//vendor/google.golang.org/grpc/internal/grpcrand:all-srcs",
+    ],
     tags = ["automanaged"],
     visibility = ["//visibility:public"],
 )

vendor/google.golang.org/grpc/internal/backoff/BUILD

@@ -0,0 +1,24 @@
+load("@io_bazel_rules_go//go:def.bzl", "go_library")
+
+go_library(
+    name = "go_default_library",
+    srcs = ["backoff.go"],
+    importmap = "k8s.io/kubernetes/vendor/google.golang.org/grpc/internal/backoff",
+    importpath = "google.golang.org/grpc/internal/backoff",
+    visibility = ["//vendor/google.golang.org/grpc:__subpackages__"],
+    deps = ["//vendor/google.golang.org/grpc/internal/grpcrand:go_default_library"],
+)
+
+filegroup(
+    name = "package-srcs",
+    srcs = glob(["**"]),
+    tags = ["automanaged"],
+    visibility = ["//visibility:private"],
+)
+
+filegroup(
+    name = "all-srcs",
+    srcs = [":package-srcs"],
+    tags = ["automanaged"],
+    visibility = ["//visibility:public"],
+)

vendor/google.golang.org/grpc/internal/backoff/backoff.go

@@ -0,0 +1,78 @@
+/*
+ *
+ * Copyright 2017 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+// Package backoff implement the backoff strategy for gRPC.
+//
+// This is kept in internal until the gRPC project decides whether or not to
+// allow alternative backoff strategies.
+package backoff
+
+import (
+	"time"
+
+	"google.golang.org/grpc/internal/grpcrand"
+)
+
+// Strategy defines the methodology for backing off after a grpc connection
+// failure.
+//
+type Strategy interface {
+	// Backoff returns the amount of time to wait before the next retry given
+	// the number of consecutive failures.
+	Backoff(retries int) time.Duration
+}
+
+const (
+	// baseDelay is the amount of time to wait before retrying after the first
+	// failure.
+	baseDelay = 1.0 * time.Second
+	// factor is applied to the backoff after each retry.
+	factor = 1.6
+	// jitter provides a range to randomize backoff delays.
+	jitter = 0.2
+)
+
+// Exponential implements exponential backoff algorithm as defined in
+// https://github.com/grpc/grpc/blob/master/doc/connection-backoff.md.
+type Exponential struct {
+	// MaxDelay is the upper bound of backoff delay.
+	MaxDelay time.Duration
+}
+
+// Backoff returns the amount of time to wait before the next retry given the
+// number of retries.
+func (bc Exponential) Backoff(retries int) time.Duration {
+	if retries == 0 {
+		return baseDelay
+	}
+	backoff, max := float64(baseDelay), float64(bc.MaxDelay)
+	for backoff < max && retries > 0 {
+		backoff *= factor
+		retries--
+	}
+	if backoff > max {
+		backoff = max
+	}
+	// Randomize backoff delays so that if a cluster of requests start at
+	// the same time, they won't operate in lockstep.
+	backoff *= 1 + jitter*(grpcrand.Float64()*2-1)
+	if backoff < 0 {
+		return 0
+	}
+	return time.Duration(backoff)
+}

vendor/google.golang.org/grpc/internal/channelz/BUILD

@@ -0,0 +1,30 @@
+load("@io_bazel_rules_go//go:def.bzl", "go_library")
+
+go_library(
+    name = "go_default_library",
+    srcs = [
+        "funcs.go",
+        "types.go",
+    ],
+    importmap = "k8s.io/kubernetes/vendor/google.golang.org/grpc/internal/channelz",
+    importpath = "google.golang.org/grpc/internal/channelz",
+    visibility = ["//vendor/google.golang.org/grpc:__subpackages__"],
+    deps = [
+        "//vendor/google.golang.org/grpc/connectivity:go_default_library",
+        "//vendor/google.golang.org/grpc/grpclog:go_default_library",
+    ],
+)
+
+filegroup(
+    name = "package-srcs",
+    srcs = glob(["**"]),
+    tags = ["automanaged"],
+    visibility = ["//visibility:private"],
+)
+
+filegroup(
+    name = "all-srcs",
+    srcs = [":package-srcs"],
+    tags = ["automanaged"],
+    visibility = ["//visibility:public"],
+)

vendor/google.golang.org/grpc/internal/channelz/funcs.go

@@ -0,0 +1,573 @@
+/*
+ *
+ * Copyright 2018 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+// Package channelz defines APIs for enabling channelz service, entry
+// registration/deletion, and accessing channelz data. It also defines channelz
+// metric struct formats.
+//
+// All APIs in this package are experimental.
+package channelz
+
+import (
+	"sort"
+	"sync"
+	"sync/atomic"
+
+	"google.golang.org/grpc/grpclog"
+)
+
+var (
+	db    dbWrapper
+	idGen idGenerator
+	// EntryPerPage defines the number of channelz entries to be shown on a web page.
+	EntryPerPage = 50
+	curState     int32
+)
+
+// TurnOn turns on channelz data collection.
+func TurnOn() {
+	if !IsOn() {
+		NewChannelzStorage()
+		atomic.StoreInt32(&curState, 1)
+	}
+}
+
+// IsOn returns whether channelz data collection is on.
+func IsOn() bool {
+	return atomic.CompareAndSwapInt32(&curState, 1, 1)
+}
+
+// dbWarpper wraps around a reference to internal channelz data storage, and
+// provide synchronized functionality to set and get the reference.
+type dbWrapper struct {
+	mu sync.RWMutex
+	DB *channelMap
+}
+
+func (d *dbWrapper) set(db *channelMap) {
+	d.mu.Lock()
+	d.DB = db
+	d.mu.Unlock()
+}
+
+func (d *dbWrapper) get() *channelMap {
+	d.mu.RLock()
+	defer d.mu.RUnlock()
+	return d.DB
+}
+
+// NewChannelzStorage initializes channelz data storage and id generator.
+//
+// Note: This function is exported for testing purpose only. User should not call
+// it in most cases.
+func NewChannelzStorage() {
+	db.set(&channelMap{
+		topLevelChannels: make(map[int64]struct{}),
+		channels:         make(map[int64]*channel),
+		listenSockets:    make(map[int64]*listenSocket),
+		normalSockets:    make(map[int64]*normalSocket),
+		servers:          make(map[int64]*server),
+		subChannels:      make(map[int64]*subChannel),
+	})
+	idGen.reset()
+}
+
+// GetTopChannels returns a slice of top channel's ChannelMetric, along with a
+// boolean indicating whether there's more top channels to be queried for.
+//
+// The arg id specifies that only top channel with id at or above it will be included
+// in the result. The returned slice is up to a length of EntryPerPage, and is
+// sorted in ascending id order.
+func GetTopChannels(id int64) ([]*ChannelMetric, bool) {
+	return db.get().GetTopChannels(id)
+}
+
+// GetServers returns a slice of server's ServerMetric, along with a
+// boolean indicating whether there's more servers to be queried for.
+//
+// The arg id specifies that only server with id at or above it will be included
+// in the result. The returned slice is up to a length of EntryPerPage, and is
+// sorted in ascending id order.
+func GetServers(id int64) ([]*ServerMetric, bool) {
+	return db.get().GetServers(id)
+}
+
+// GetServerSockets returns a slice of server's (identified by id) normal socket's
+// SocketMetric, along with a boolean indicating whether there's more sockets to
+// be queried for.
+//
+// The arg startID specifies that only sockets with id at or above it will be
+// included in the result. The returned slice is up to a length of EntryPerPage,
+// and is sorted in ascending id order.
+func GetServerSockets(id int64, startID int64) ([]*SocketMetric, bool) {
+	return db.get().GetServerSockets(id, startID)
+}
+
+// GetChannel returns the ChannelMetric for the channel (identified by id).
+func GetChannel(id int64) *ChannelMetric {
+	return db.get().GetChannel(id)
+}
+
+// GetSubChannel returns the SubChannelMetric for the subchannel (identified by id).
+func GetSubChannel(id int64) *SubChannelMetric {
+	return db.get().GetSubChannel(id)
+}
+
+// GetSocket returns the SocketInternalMetric for the socket (identified by id).
+func GetSocket(id int64) *SocketMetric {
+	return db.get().GetSocket(id)
+}
+
+// RegisterChannel registers the given channel c in channelz database with ref
+// as its reference name, and add it to the child list of its parent (identified
+// by pid). pid = 0 means no parent. It returns the unique channelz tracking id
+// assigned to this channel.
+func RegisterChannel(c Channel, pid int64, ref string) int64 {
+	id := idGen.genID()
+	cn := &channel{
+		refName:     ref,
+		c:           c,
+		subChans:    make(map[int64]string),
+		nestedChans: make(map[int64]string),
+		id:          id,
+		pid:         pid,
+	}
+	if pid == 0 {
+		db.get().addChannel(id, cn, true, pid, ref)
+	} else {
+		db.get().addChannel(id, cn, false, pid, ref)
+	}
+	return id
+}
+
+// RegisterSubChannel registers the given channel c in channelz database with ref
+// as its reference name, and add it to the child list of its parent (identified
+// by pid). It returns the unique channelz tracking id assigned to this subchannel.
+func RegisterSubChannel(c Channel, pid int64, ref string) int64 {
+	if pid == 0 {
+		grpclog.Error("a SubChannel's parent id cannot be 0")
+		return 0
+	}
+	id := idGen.genID()
+	sc := &subChannel{
+		refName: ref,
+		c:       c,
+		sockets: make(map[int64]string),
+		id:      id,
+		pid:     pid,
+	}
+	db.get().addSubChannel(id, sc, pid, ref)
+	return id
+}
+
+// RegisterServer registers the given server s in channelz database. It returns
+// the unique channelz tracking id assigned to this server.
+func RegisterServer(s Server, ref string) int64 {
+	id := idGen.genID()
+	svr := &server{
+		refName:       ref,
+		s:             s,
+		sockets:       make(map[int64]string),
+		listenSockets: make(map[int64]string),
+		id:            id,
+	}
+	db.get().addServer(id, svr)
+	return id
+}
+
+// RegisterListenSocket registers the given listen socket s in channelz database
+// with ref as its reference name, and add it to the child list of its parent
+// (identified by pid). It returns the unique channelz tracking id assigned to
+// this listen socket.
+func RegisterListenSocket(s Socket, pid int64, ref string) int64 {
+	if pid == 0 {
+		grpclog.Error("a ListenSocket's parent id cannot be 0")
+		return 0
+	}
+	id := idGen.genID()
+	ls := &listenSocket{refName: ref, s: s, id: id, pid: pid}
+	db.get().addListenSocket(id, ls, pid, ref)
+	return id
+}
+
+// RegisterNormalSocket registers the given normal socket s in channelz database
+// with ref as its reference name, and add it to the child list of its parent
+// (identified by pid). It returns the unique channelz tracking id assigned to
+// this normal socket.
+func RegisterNormalSocket(s Socket, pid int64, ref string) int64 {
+	if pid == 0 {
+		grpclog.Error("a NormalSocket's parent id cannot be 0")
+		return 0
+	}
+	id := idGen.genID()
+	ns := &normalSocket{refName: ref, s: s, id: id, pid: pid}
+	db.get().addNormalSocket(id, ns, pid, ref)
+	return id
+}
+
+// RemoveEntry removes an entry with unique channelz trakcing id to be id from
+// channelz database.
+func RemoveEntry(id int64) {
+	db.get().removeEntry(id)
+}
+
+// channelMap is the storage data structure for channelz.
+// Methods of channelMap can be divided in two two categories with respect to locking.
+// 1. Methods acquire the global lock.
+// 2. Methods that can only be called when global lock is held.
+// A second type of method need always to be called inside a first type of method.
+type channelMap struct {
+	mu               sync.RWMutex
+	topLevelChannels map[int64]struct{}
+	servers          map[int64]*server
+	channels         map[int64]*channel
+	subChannels      map[int64]*subChannel
+	listenSockets    map[int64]*listenSocket
+	normalSockets    map[int64]*normalSocket
+}
+
+func (c *channelMap) addServer(id int64, s *server) {
+	c.mu.Lock()
+	s.cm = c
+	c.servers[id] = s
+	c.mu.Unlock()
+}
+
+func (c *channelMap) addChannel(id int64, cn *channel, isTopChannel bool, pid int64, ref string) {
+	c.mu.Lock()
+	cn.cm = c
+	c.channels[id] = cn
+	if isTopChannel {
+		c.topLevelChannels[id] = struct{}{}
+	} else {
+		c.findEntry(pid).addChild(id, cn)
+	}
+	c.mu.Unlock()
+}
+
+func (c *channelMap) addSubChannel(id int64, sc *subChannel, pid int64, ref string) {
+	c.mu.Lock()
+	sc.cm = c
+	c.subChannels[id] = sc
+	c.findEntry(pid).addChild(id, sc)
+	c.mu.Unlock()
+}
+
+func (c *channelMap) addListenSocket(id int64, ls *listenSocket, pid int64, ref string) {
+	c.mu.Lock()
+	ls.cm = c
+	c.listenSockets[id] = ls
+	c.findEntry(pid).addChild(id, ls)
+	c.mu.Unlock()
+}
+
+func (c *channelMap) addNormalSocket(id int64, ns *normalSocket, pid int64, ref string) {
+	c.mu.Lock()
+	ns.cm = c
+	c.normalSockets[id] = ns
+	c.findEntry(pid).addChild(id, ns)
+	c.mu.Unlock()
+}
+
+// removeEntry triggers the removal of an entry, which may not indeed delete the
+// entry, if it has to wait on the deletion of its children, or may lead to a chain
+// of entry deletion. For example, deleting the last socket of a gracefully shutting
+// down server will lead to the server being also deleted.
+func (c *channelMap) removeEntry(id int64) {
+	c.mu.Lock()
+	c.findEntry(id).triggerDelete()
+	c.mu.Unlock()
+}
+
+// c.mu must be held by the caller.
+func (c *channelMap) findEntry(id int64) entry {
+	var v entry
+	var ok bool
+	if v, ok = c.channels[id]; ok {
+		return v
+	}
+	if v, ok = c.subChannels[id]; ok {
+		return v
+	}
+	if v, ok = c.servers[id]; ok {
+		return v
+	}
+	if v, ok = c.listenSockets[id]; ok {
+		return v
+	}
+	if v, ok = c.normalSockets[id]; ok {
+		return v
+	}
+	return &dummyEntry{idNotFound: id}
+}
+
+// c.mu must be held by the caller
+// deleteEntry simply deletes an entry from the channelMap. Before calling this
+// method, caller must check this entry is ready to be deleted, i.e removeEntry()
+// has been called on it, and no children still exist.
+// Conditionals are ordered by the expected frequency of deletion of each entity
+// type, in order to optimize performance.
+func (c *channelMap) deleteEntry(id int64) {
+	var ok bool
+	if _, ok = c.normalSockets[id]; ok {
+		delete(c.normalSockets, id)
+		return
+	}
+	if _, ok = c.subChannels[id]; ok {
+		delete(c.subChannels, id)
+		return
+	}
+	if _, ok = c.channels[id]; ok {
+		delete(c.channels, id)
+		delete(c.topLevelChannels, id)
+		return
+	}
+	if _, ok = c.listenSockets[id]; ok {
+		delete(c.listenSockets, id)
+		return
+	}
+	if _, ok = c.servers[id]; ok {
+		delete(c.servers, id)
+		return
+	}
+}
+
+type int64Slice []int64
+
+func (s int64Slice) Len() int           { return len(s) }
+func (s int64Slice) Swap(i, j int)      { s[i], s[j] = s[j], s[i] }
+func (s int64Slice) Less(i, j int) bool { return s[i] < s[j] }
+
+func copyMap(m map[int64]string) map[int64]string {
+	n := make(map[int64]string)
+	for k, v := range m {
+		n[k] = v
+	}
+	return n
+}
+
+func min(a, b int) int {
+	if a < b {
+		return a
+	}
+	return b
+}
+
+func (c *channelMap) GetTopChannels(id int64) ([]*ChannelMetric, bool) {
+	c.mu.RLock()
+	l := len(c.topLevelChannels)
+	ids := make([]int64, 0, l)
+	cns := make([]*channel, 0, min(l, EntryPerPage))
+
+	for k := range c.topLevelChannels {
+		ids = append(ids, k)
+	}
+	sort.Sort(int64Slice(ids))
+	idx := sort.Search(len(ids), func(i int) bool { return ids[i] >= id })
+	count := 0
+	var end bool
+	var t []*ChannelMetric
+	for i, v := range ids[idx:] {
+		if count == EntryPerPage {
+			break
+		}
+		if cn, ok := c.channels[v]; ok {
+			cns = append(cns, cn)
+			t = append(t, &ChannelMetric{
+				NestedChans: copyMap(cn.nestedChans),
+				SubChans:    copyMap(cn.subChans),
+			})
+			count++
+		}
+		if i == len(ids[idx:])-1 {
+			end = true
+			break
+		}
+	}
+	c.mu.RUnlock()
+	if count == 0 {
+		end = true
+	}
+
+	for i, cn := range cns {
+		t[i].ChannelData = cn.c.ChannelzMetric()
+		t[i].ID = cn.id
+		t[i].RefName = cn.refName
+	}
+	return t, end
+}
+
+func (c *channelMap) GetServers(id int64) ([]*ServerMetric, bool) {
+	c.mu.RLock()
+	l := len(c.servers)
+	ids := make([]int64, 0, l)
+	ss := make([]*server, 0, min(l, EntryPerPage))
+	for k := range c.servers {
+		ids = append(ids, k)
+	}
+	sort.Sort(int64Slice(ids))
+	idx := sort.Search(len(ids), func(i int) bool { return ids[i] >= id })
+	count := 0
+	var end bool
+	var s []*ServerMetric
+	for i, v := range ids[idx:] {
+		if count == EntryPerPage {
+			break
+		}
+		if svr, ok := c.servers[v]; ok {
+			ss = append(ss, svr)
+			s = append(s, &ServerMetric{
+				ListenSockets: copyMap(svr.listenSockets),
+			})
+			count++
+		}
+		if i == len(ids[idx:])-1 {
+			end = true
+			break
+		}
+	}
+	c.mu.RUnlock()
+	if count == 0 {
+		end = true
+	}
+
+	for i, svr := range ss {
+		s[i].ServerData = svr.s.ChannelzMetric()
+		s[i].ID = svr.id
+		s[i].RefName = svr.refName
+	}
+	return s, end
+}
+
+func (c *channelMap) GetServerSockets(id int64, startID int64) ([]*SocketMetric, bool) {
+	var svr *server
+	var ok bool
+	c.mu.RLock()
+	if svr, ok = c.servers[id]; !ok {
+		// server with id doesn't exist.
+		c.mu.RUnlock()
+		return nil, true
+	}
+	svrskts := svr.sockets
+	l := len(svrskts)
+	ids := make([]int64, 0, l)
+	sks := make([]*normalSocket, 0, min(l, EntryPerPage))
+	for k := range svrskts {
+		ids = append(ids, k)
+	}
+	sort.Sort((int64Slice(ids)))
+	idx := sort.Search(len(ids), func(i int) bool { return ids[i] >= id })
+	count := 0
+	var end bool
+	for i, v := range ids[idx:] {
+		if count == EntryPerPage {
+			break
+		}
+		if ns, ok := c.normalSockets[v]; ok {
+			sks = append(sks, ns)
+			count++
+		}
+		if i == len(ids[idx:])-1 {
+			end = true
+			break
+		}
+	}
+	c.mu.RUnlock()
+	if count == 0 {
+		end = true
+	}
+	var s []*SocketMetric
+	for _, ns := range sks {
+		sm := &SocketMetric{}
+		sm.SocketData = ns.s.ChannelzMetric()
+		sm.ID = ns.id
+		sm.RefName = ns.refName
+		s = append(s, sm)
+	}
+	return s, end
+}
+
+func (c *channelMap) GetChannel(id int64) *ChannelMetric {
+	cm := &ChannelMetric{}
+	var cn *channel
+	var ok bool
+	c.mu.RLock()
+	if cn, ok = c.channels[id]; !ok {
+		// channel with id doesn't exist.
+		c.mu.RUnlock()
+		return nil
+	}
+	cm.NestedChans = copyMap(cn.nestedChans)
+	cm.SubChans = copyMap(cn.subChans)
+	c.mu.RUnlock()
+	cm.ChannelData = cn.c.ChannelzMetric()
+	cm.ID = cn.id
+	cm.RefName = cn.refName
+	return cm
+}
+
+func (c *channelMap) GetSubChannel(id int64) *SubChannelMetric {
+	cm := &SubChannelMetric{}
+	var sc *subChannel
+	var ok bool
+	c.mu.RLock()
+	if sc, ok = c.subChannels[id]; !ok {
+		// subchannel with id doesn't exist.
+		c.mu.RUnlock()
+		return nil
+	}
+	cm.Sockets = copyMap(sc.sockets)
+	c.mu.RUnlock()
+	cm.ChannelData = sc.c.ChannelzMetric()
+	cm.ID = sc.id
+	cm.RefName = sc.refName
+	return cm
+}
+
+func (c *channelMap) GetSocket(id int64) *SocketMetric {
+	sm := &SocketMetric{}
+	c.mu.RLock()
+	if ls, ok := c.listenSockets[id]; ok {
+		c.mu.RUnlock()
+		sm.SocketData = ls.s.ChannelzMetric()
+		sm.ID = ls.id
+		sm.RefName = ls.refName
+		return sm
+	}
+	if ns, ok := c.normalSockets[id]; ok {
+		c.mu.RUnlock()
+		sm.SocketData = ns.s.ChannelzMetric()
+		sm.ID = ns.id
+		sm.RefName = ns.refName
+		return sm
+	}
+	c.mu.RUnlock()
+	return nil
+}
+
+type idGenerator struct {
+	id int64
+}
+
+func (i *idGenerator) reset() {
+	atomic.StoreInt64(&i.id, 0)
+}
+
+func (i *idGenerator) genID() int64 {
+	return atomic.AddInt64(&i.id, 1)
+}

vendor/google.golang.org/grpc/internal/channelz/types.go

@@ -0,0 +1,418 @@
+/*
+ *
+ * Copyright 2018 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package channelz
+
+import (
+	"net"
+	"time"
+
+	"google.golang.org/grpc/connectivity"
+	"google.golang.org/grpc/grpclog"
+)
+
+// entry represents a node in the channelz database.
+type entry interface {
+	// addChild adds a child e, whose channelz id is id to child list
+	addChild(id int64, e entry)
+	// deleteChild deletes a child with channelz id to be id from child list
+	deleteChild(id int64)
+	// triggerDelete tries to delete self from channelz database. However, if child
+	// list is not empty, then deletion from the database is on hold until the last
+	// child is deleted from database.
+	triggerDelete()
+	// deleteSelfIfReady check whether triggerDelete() has been called before, and whether child
+	// list is now empty. If both conditions are met, then delete self from database.
+	deleteSelfIfReady()
+}
+
+// dummyEntry is a fake entry to handle entry not found case.
+type dummyEntry struct {
+	idNotFound int64
+}
+
+func (d *dummyEntry) addChild(id int64, e entry) {
+	// Note: It is possible for a normal program to reach here under race condition.
+	// For example, there could be a race between ClientConn.Close() info being propagated
+	// to addrConn and http2Client. ClientConn.Close() cancel the context and result
+	// in http2Client to error. The error info is then caught by transport monitor
+	// and before addrConn.tearDown() is called in side ClientConn.Close(). Therefore,
+	// the addrConn will create a new transport. And when registering the new transport in
+	// channelz, its parent addrConn could have already been torn down and deleted
+	// from channelz tracking, and thus reach the code here.
+	grpclog.Infof("attempt to add child of type %T with id %d to a parent (id=%d) that doesn't currently exist", e, id, d.idNotFound)
+}
+
+func (d *dummyEntry) deleteChild(id int64) {
+	// It is possible for a normal program to reach here under race condition.
+	// Refer to the example described in addChild().
+	grpclog.Infof("attempt to delete child with id %d from a parent (id=%d) that doesn't currently exist", id, d.idNotFound)
+}
+
+func (d *dummyEntry) triggerDelete() {
+	grpclog.Warningf("attempt to delete an entry (id=%d) that doesn't currently exist", d.idNotFound)
+}
+
+func (*dummyEntry) deleteSelfIfReady() {
+	// code should not reach here. deleteSelfIfReady is always called on an existing entry.
+}
+
+// ChannelMetric defines the info channelz provides for a specific Channel, which
+// includes ChannelInternalMetric and channelz-specific data, such as channelz id,
+// child list, etc.
+type ChannelMetric struct {
+	// ID is the channelz id of this channel.
+	ID int64
+	// RefName is the human readable reference string of this channel.
+	RefName string
+	// ChannelData contains channel internal metric reported by the channel through
+	// ChannelzMetric().
+	ChannelData *ChannelInternalMetric
+	// NestedChans tracks the nested channel type children of this channel in the format of
+	// a map from nested channel channelz id to corresponding reference string.
+	NestedChans map[int64]string
+	// SubChans tracks the subchannel type children of this channel in the format of a
+	// map from subchannel channelz id to corresponding reference string.
+	SubChans map[int64]string
+	// Sockets tracks the socket type children of this channel in the format of a map
+	// from socket channelz id to corresponding reference string.
+	// Note current grpc implementation doesn't allow channel having sockets directly,
+	// therefore, this is field is unused.
+	Sockets map[int64]string
+}
+
+// SubChannelMetric defines the info channelz provides for a specific SubChannel,
+// which includes ChannelInternalMetric and channelz-specific data, such as
+// channelz id, child list, etc.
+type SubChannelMetric struct {
+	// ID is the channelz id of this subchannel.
+	ID int64
+	// RefName is the human readable reference string of this subchannel.
+	RefName string
+	// ChannelData contains subchannel internal metric reported by the subchannel
+	// through ChannelzMetric().
+	ChannelData *ChannelInternalMetric
+	// NestedChans tracks the nested channel type children of this subchannel in the format of
+	// a map from nested channel channelz id to corresponding reference string.
+	// Note current grpc implementation doesn't allow subchannel to have nested channels
+	// as children, therefore, this field is unused.
+	NestedChans map[int64]string
+	// SubChans tracks the subchannel type children of this subchannel in the format of a
+	// map from subchannel channelz id to corresponding reference string.
+	// Note current grpc implementation doesn't allow subchannel to have subchannels
+	// as children, therefore, this field is unused.
+	SubChans map[int64]string
+	// Sockets tracks the socket type children of this subchannel in the format of a map
+	// from socket channelz id to corresponding reference string.
+	Sockets map[int64]string
+}
+
+// ChannelInternalMetric defines the struct that the implementor of Channel interface
+// should return from ChannelzMetric().
+type ChannelInternalMetric struct {
+	// current connectivity state of the channel.
+	State connectivity.State
+	// The target this channel originally tried to connect to.  May be absent
+	Target string
+	// The number of calls started on the channel.
+	CallsStarted int64
+	// The number of calls that have completed with an OK status.
+	CallsSucceeded int64
+	// The number of calls that have a completed with a non-OK status.
+	CallsFailed int64
+	// The last time a call was started on the channel.
+	LastCallStartedTimestamp time.Time
+	//TODO: trace
+}
+
+// Channel is the interface that should be satisfied in order to be tracked by
+// channelz as Channel or SubChannel.
+type Channel interface {
+	ChannelzMetric() *ChannelInternalMetric
+}
+
+type channel struct {
+	refName     string
+	c           Channel
+	closeCalled bool
+	nestedChans map[int64]string
+	subChans    map[int64]string
+	id          int64
+	pid         int64
+	cm          *channelMap
+}
+
+func (c *channel) addChild(id int64, e entry) {
+	switch v := e.(type) {
+	case *subChannel:
+		c.subChans[id] = v.refName
+	case *channel:
+		c.nestedChans[id] = v.refName
+	default:
+		grpclog.Errorf("cannot add a child (id = %d) of type %T to a channel", id, e)
+	}
+}
+
+func (c *channel) deleteChild(id int64) {
+	delete(c.subChans, id)
+	delete(c.nestedChans, id)
+	c.deleteSelfIfReady()
+}
+
+func (c *channel) triggerDelete() {
+	c.closeCalled = true
+	c.deleteSelfIfReady()
+}
+
+func (c *channel) deleteSelfIfReady() {
+	if !c.closeCalled || len(c.subChans)+len(c.nestedChans) != 0 {
+		return
+	}
+	c.cm.deleteEntry(c.id)
+	// not top channel
+	if c.pid != 0 {
+		c.cm.findEntry(c.pid).deleteChild(c.id)
+	}
+}
+
+type subChannel struct {
+	refName     string
+	c           Channel
+	closeCalled bool
+	sockets     map[int64]string
+	id          int64
+	pid         int64
+	cm          *channelMap
+}
+
+func (sc *subChannel) addChild(id int64, e entry) {
+	if v, ok := e.(*normalSocket); ok {
+		sc.sockets[id] = v.refName
+	} else {
+		grpclog.Errorf("cannot add a child (id = %d) of type %T to a subChannel", id, e)
+	}
+}
+
+func (sc *subChannel) deleteChild(id int64) {
+	delete(sc.sockets, id)
+	sc.deleteSelfIfReady()
+}
+
+func (sc *subChannel) triggerDelete() {
+	sc.closeCalled = true
+	sc.deleteSelfIfReady()
+}
+
+func (sc *subChannel) deleteSelfIfReady() {
+	if !sc.closeCalled || len(sc.sockets) != 0 {
+		return
+	}
+	sc.cm.deleteEntry(sc.id)
+	sc.cm.findEntry(sc.pid).deleteChild(sc.id)
+}
+
+// SocketMetric defines the info channelz provides for a specific Socket, which
+// includes SocketInternalMetric and channelz-specific data, such as channelz id, etc.
+type SocketMetric struct {
+	// ID is the channelz id of this socket.
+	ID int64
+	// RefName is the human readable reference string of this socket.
+	RefName string
+	// SocketData contains socket internal metric reported by the socket through
+	// ChannelzMetric().
+	SocketData *SocketInternalMetric
+}
+
+// SocketInternalMetric defines the struct that the implementor of Socket interface
+// should return from ChannelzMetric().
+type SocketInternalMetric struct {
+	// The number of streams that have been started.
+	StreamsStarted int64
+	// The number of streams that have ended successfully:
+	// On client side, receiving frame with eos bit set.
+	// On server side, sending frame with eos bit set.
+	StreamsSucceeded int64
+	// The number of streams that have ended unsuccessfully:
+	// On client side, termination without receiving frame with eos bit set.
+	// On server side, termination without sending frame with eos bit set.
+	StreamsFailed int64
+	// The number of messages successfully sent on this socket.
+	MessagesSent     int64
+	MessagesReceived int64
+	// The number of keep alives sent.  This is typically implemented with HTTP/2
+	// ping messages.
+	KeepAlivesSent int64
+	// The last time a stream was created by this endpoint.  Usually unset for
+	// servers.
+	LastLocalStreamCreatedTimestamp time.Time
+	// The last time a stream was created by the remote endpoint.  Usually unset
+	// for clients.
+	LastRemoteStreamCreatedTimestamp time.Time
+	// The last time a message was sent by this endpoint.
+	LastMessageSentTimestamp time.Time
+	// The last time a message was received by this endpoint.
+	LastMessageReceivedTimestamp time.Time
+	// The amount of window, granted to the local endpoint by the remote endpoint.
+	// This may be slightly out of date due to network latency.  This does NOT
+	// include stream level or TCP level flow control info.
+	LocalFlowControlWindow int64
+	// The amount of window, granted to the remote endpoint by the local endpoint.
+	// This may be slightly out of date due to network latency.  This does NOT
+	// include stream level or TCP level flow control info.
+	RemoteFlowControlWindow int64
+	// The locally bound address.
+	LocalAddr net.Addr
+	// The remote bound address.  May be absent.
+	RemoteAddr net.Addr
+	// Optional, represents the name of the remote endpoint, if different than
+	// the original target name.
+	RemoteName string
+	//TODO: socket options
+	//TODO: Security
+}
+
+// Socket is the interface that should be satisfied in order to be tracked by
+// channelz as Socket.
+type Socket interface {
+	ChannelzMetric() *SocketInternalMetric
+}
+
+type listenSocket struct {
+	refName string
+	s       Socket
+	id      int64
+	pid     int64
+	cm      *channelMap
+}
+
+func (ls *listenSocket) addChild(id int64, e entry) {
+	grpclog.Errorf("cannot add a child (id = %d) of type %T to a listen socket", id, e)
+}
+
+func (ls *listenSocket) deleteChild(id int64) {
+	grpclog.Errorf("cannot delete a child (id = %d) from a listen socket", id)
+}
+
+func (ls *listenSocket) triggerDelete() {
+	ls.cm.deleteEntry(ls.id)
+	ls.cm.findEntry(ls.pid).deleteChild(ls.id)
+}
+
+func (ls *listenSocket) deleteSelfIfReady() {
+	grpclog.Errorf("cannot call deleteSelfIfReady on a listen socket")
+}
+
+type normalSocket struct {
+	refName string
+	s       Socket
+	id      int64
+	pid     int64
+	cm      *channelMap
+}
+
+func (ns *normalSocket) addChild(id int64, e entry) {
+	grpclog.Errorf("cannot add a child (id = %d) of type %T to a normal socket", id, e)
+}
+
+func (ns *normalSocket) deleteChild(id int64) {
+	grpclog.Errorf("cannot delete a child (id = %d) from a normal socket", id)
+}
+
+func (ns *normalSocket) triggerDelete() {
+	ns.cm.deleteEntry(ns.id)
+	ns.cm.findEntry(ns.pid).deleteChild(ns.id)
+}
+
+func (ns *normalSocket) deleteSelfIfReady() {
+	grpclog.Errorf("cannot call deleteSelfIfReady on a normal socket")
+}
+
+// ServerMetric defines the info channelz provides for a specific Server, which
+// includes ServerInternalMetric and channelz-specific data, such as channelz id,
+// child list, etc.
+type ServerMetric struct {
+	// ID is the channelz id of this server.
+	ID int64
+	// RefName is the human readable reference string of this server.
+	RefName string
+	// ServerData contains server internal metric reported by the server through
+	// ChannelzMetric().
+	ServerData *ServerInternalMetric
+	// ListenSockets tracks the listener socket type children of this server in the
+	// format of a map from socket channelz id to corresponding reference string.
+	ListenSockets map[int64]string
+}
+
+// ServerInternalMetric defines the struct that the implementor of Server interface
+// should return from ChannelzMetric().
+type ServerInternalMetric struct {
+	// The number of incoming calls started on the server.
+	CallsStarted int64
+	// The number of incoming calls that have completed with an OK status.
+	CallsSucceeded int64
+	// The number of incoming calls that have a completed with a non-OK status.
+	CallsFailed int64
+	// The last time a call was started on the server.
+	LastCallStartedTimestamp time.Time
+	//TODO: trace
+}
+
+// Server is the interface to be satisfied in order to be tracked by channelz as
+// Server.
+type Server interface {
+	ChannelzMetric() *ServerInternalMetric
+}
+
+type server struct {
+	refName       string
+	s             Server
+	closeCalled   bool
+	sockets       map[int64]string
+	listenSockets map[int64]string
+	id            int64
+	cm            *channelMap
+}
+
+func (s *server) addChild(id int64, e entry) {
+	switch v := e.(type) {
+	case *normalSocket:
+		s.sockets[id] = v.refName
+	case *listenSocket:
+		s.listenSockets[id] = v.refName
+	default:
+		grpclog.Errorf("cannot add a child (id = %d) of type %T to a server", id, e)
+	}
+}
+
+func (s *server) deleteChild(id int64) {
+	delete(s.sockets, id)
+	delete(s.listenSockets, id)
+	s.deleteSelfIfReady()
+}
+
+func (s *server) triggerDelete() {
+	s.closeCalled = true
+	s.deleteSelfIfReady()
+}
+
+func (s *server) deleteSelfIfReady() {
+	if !s.closeCalled || len(s.sockets)+len(s.listenSockets) != 0 {
+		return
+	}
+	s.cm.deleteEntry(s.id)
+}

vendor/google.golang.org/grpc/internal/grpcrand/BUILD

@@ -0,0 +1,23 @@
+load("@io_bazel_rules_go//go:def.bzl", "go_library")
+
+go_library(
+    name = "go_default_library",
+    srcs = ["grpcrand.go"],
+    importmap = "k8s.io/kubernetes/vendor/google.golang.org/grpc/internal/grpcrand",
+    importpath = "google.golang.org/grpc/internal/grpcrand",
+    visibility = ["//vendor/google.golang.org/grpc:__subpackages__"],
+)
+
+filegroup(
+    name = "package-srcs",
+    srcs = glob(["**"]),
+    tags = ["automanaged"],
+    visibility = ["//visibility:private"],
+)
+
+filegroup(
+    name = "all-srcs",
+    srcs = [":package-srcs"],
+    tags = ["automanaged"],
+    visibility = ["//visibility:public"],
+)

vendor/google.golang.org/grpc/internal/grpcrand/grpcrand.go

@@ -0,0 +1,56 @@
+/*
+ *
+ * Copyright 2018 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+// Package grpcrand implements math/rand functions in a concurrent-safe way
+// with a global random source, independent of math/rand's global source.
+package grpcrand
+
+import (
+	"math/rand"
+	"sync"
+	"time"
+)
+
+var (
+	r  = rand.New(rand.NewSource(time.Now().UnixNano()))
+	mu sync.Mutex
+)
+
+// Int63n implements rand.Int63n on the grpcrand global source.
+func Int63n(n int64) int64 {
+	mu.Lock()
+	res := r.Int63n(n)
+	mu.Unlock()
+	return res
+}
+
+// Intn implements rand.Intn on the grpcrand global source.
+func Intn(n int) int {
+	mu.Lock()
+	res := r.Intn(n)
+	mu.Unlock()
+	return res
+}
+
+// Float64 implements rand.Float64 on the grpcrand global source.
+func Float64() float64 {
+	mu.Lock()
+	res := r.Float64()
+	mu.Unlock()
+	return res
+}

vendor/google.golang.org/grpc/internal/internal.go

@@ -15,20 +15,22 @@
  *
  */
 
-// Package internal contains gRPC-internal code for testing, to avoid polluting
+// Package internal contains gRPC-internal code, to avoid polluting
-// the godoc of the top-level grpc package.
+// the godoc of the top-level grpc package.  It must not import any grpc
+// symbols to avoid circular dependencies.
 package internal
 
-// TestingCloseConns closes all existing transports but keeps
+var (
-// grpcServer.lis accepting new connections.
-//
-// The provided grpcServer must be of type *grpc.Server. It is untyped
-// for circular dependency reasons.
-var TestingCloseConns func(grpcServer interface{})
 
-// TestingUseHandlerImpl enables the http.Handler-based server implementation.
+	// TestingUseHandlerImpl enables the http.Handler-based server implementation.
-// It must be called before Serve and requires TLS credentials.
+	// It must be called before Serve and requires TLS credentials.
-//
+	//
-// The provided grpcServer must be of type *grpc.Server. It is untyped
+	// The provided grpcServer must be of type *grpc.Server. It is untyped
-// for circular dependency reasons.
+	// for circular dependency reasons.
-var TestingUseHandlerImpl func(grpcServer interface{})
+	TestingUseHandlerImpl func(grpcServer interface{})
+
+	// WithContextDialer is exported by clientconn.go
+	WithContextDialer interface{} // func(context.Context, string) (net.Conn, error) grpc.DialOption
+	// WithResolverBuilder is exported by clientconn.go
+	WithResolverBuilder interface{} // func (resolver.Builder) grpc.DialOption
+)

vendor/google.golang.org/grpc/metadata/metadata.go

@@ -17,7 +17,8 @@
  */
 
 // Package metadata define the structure of the metadata supported by gRPC library.
-// Please refer to https://grpc.io/docs/guides/wire.html for more information about custom-metadata.
+// Please refer to https://github.com/grpc/grpc/blob/master/doc/PROTOCOL-HTTP2.md
+// for more information about custom-metadata.
 package metadata
 
 import (
@@ -27,7 +28,9 @@ import (
 	"golang.org/x/net/context"
 )
 
-// DecodeKeyValue returns k, v, nil.  It is deprecated and should not be used.
+// DecodeKeyValue returns k, v, nil.
+//
+// Deprecated: use k and v directly instead.
 func DecodeKeyValue(k, v string) (string, string, error) {
 	return k, v, nil
 }
@@ -94,6 +97,30 @@ func (md MD) Copy() MD {
 	return Join(md)
 }
 
+// Get obtains the values for a given key.
+func (md MD) Get(k string) []string {
+	k = strings.ToLower(k)
+	return md[k]
+}
+
+// Set sets the value of a given key with a slice of values.
+func (md MD) Set(k string, vals ...string) {
+	if len(vals) == 0 {
+		return
+	}
+	k = strings.ToLower(k)
+	md[k] = vals
+}
+
+// Append adds the values to key k, not overwriting what was already stored at that key.
+func (md MD) Append(k string, vals ...string) {
+	if len(vals) == 0 {
+		return
+	}
+	k = strings.ToLower(k)
+	md[k] = append(md[k], vals...)
+}
+
 // Join joins any number of mds into a single MD.
 // The order of values for each key is determined by the order in which
 // the mds containing those values are presented to Join.
@@ -115,9 +142,26 @@ func NewIncomingContext(ctx context.Context, md MD) context.Context {
 	return context.WithValue(ctx, mdIncomingKey{}, md)
 }
 
-// NewOutgoingContext creates a new context with outgoing md attached.
+// NewOutgoingContext creates a new context with outgoing md attached. If used
+// in conjunction with AppendToOutgoingContext, NewOutgoingContext will
+// overwrite any previously-appended metadata.
 func NewOutgoingContext(ctx context.Context, md MD) context.Context {
-	return context.WithValue(ctx, mdOutgoingKey{}, md)
+	return context.WithValue(ctx, mdOutgoingKey{}, rawMD{md: md})
+}
+
+// AppendToOutgoingContext returns a new context with the provided kv merged
+// with any existing metadata in the context. Please refer to the
+// documentation of Pairs for a description of kv.
+func AppendToOutgoingContext(ctx context.Context, kv ...string) context.Context {
+	if len(kv)%2 == 1 {
+		panic(fmt.Sprintf("metadata: AppendToOutgoingContext got an odd number of input pairs for metadata: %d", len(kv)))
+	}
+	md, _ := ctx.Value(mdOutgoingKey{}).(rawMD)
+	added := make([][]string, len(md.added)+1)
+	copy(added, md.added)
+	added[len(added)-1] = make([]string, len(kv))
+	copy(added[len(added)-1], kv)
+	return context.WithValue(ctx, mdOutgoingKey{}, rawMD{md: md.md, added: added})
 }
 
 // FromIncomingContext returns the incoming metadata in ctx if it exists.  The
@@ -128,10 +172,39 @@ func FromIncomingContext(ctx context.Context) (md MD, ok bool) {
 	return
 }
 
+// FromOutgoingContextRaw returns the un-merged, intermediary contents
+// of rawMD. Remember to perform strings.ToLower on the keys. The returned
+// MD should not be modified. Writing to it may cause races. Modification
+// should be made to copies of the returned MD.
+//
+// This is intended for gRPC-internal use ONLY.
+func FromOutgoingContextRaw(ctx context.Context) (MD, [][]string, bool) {
+	raw, ok := ctx.Value(mdOutgoingKey{}).(rawMD)
+	if !ok {
+		return nil, nil, false
+	}
+
+	return raw.md, raw.added, true
+}
+
 // FromOutgoingContext returns the outgoing metadata in ctx if it exists.  The
 // returned MD should not be modified. Writing to it may cause races.
-// Modification should be made to the copies of the returned MD.
+// Modification should be made to copies of the returned MD.
-func FromOutgoingContext(ctx context.Context) (md MD, ok bool) {
+func FromOutgoingContext(ctx context.Context) (MD, bool) {
-	md, ok = ctx.Value(mdOutgoingKey{}).(MD)
+	raw, ok := ctx.Value(mdOutgoingKey{}).(rawMD)
-	return
+	if !ok {
+		return nil, false
+	}
+
+	mds := make([]MD, 0, len(raw.added)+1)
+	mds = append(mds, raw.md)
+	for _, vv := range raw.added {
+		mds = append(mds, Pairs(vv...))
+	}
+	return Join(mds...), ok
+}
+
+type rawMD struct {
+	md    MD
+	added [][]string
 }

vendor/google.golang.org/grpc/naming/dns_resolver.go

@@ -153,10 +153,10 @@ type ipWatcher struct {
 	updateChan chan *Update
 }
 
-// Next returns the adrress resolution Update for the target. For IP address,
+// Next returns the address resolution Update for the target. For IP address,
-// the resolution is itself, thus polling name server is unncessary. Therefore,
+// the resolution is itself, thus polling name server is unnecessary. Therefore,
 // Next() will return an Update the first time it is called, and will be blocked
-// for all following calls as no Update exisits until watcher is closed.
+// for all following calls as no Update exists until watcher is closed.
 func (i *ipWatcher) Next() ([]*Update, error) {
 	u, ok := <-i.updateChan
 	if !ok {

vendor/google.golang.org/grpc/naming/go17.go

@@ -1,4 +1,4 @@
-// +build go1.7, !go1.8
+// +build go1.6,!go1.8
 
 /*
  *

vendor/google.golang.org/grpc/naming/naming.go

@@ -18,20 +18,26 @@
 
 // Package naming defines the naming API and related data structures for gRPC.
 // The interface is EXPERIMENTAL and may be suject to change.
+//
+// Deprecated: please use package resolver.
 package naming
 
 // Operation defines the corresponding operations for a name resolution change.
+//
+// Deprecated: please use package resolver.
 type Operation uint8
 
 const (
 	// Add indicates a new address is added.
 	Add Operation = iota
-	// Delete indicates an exisiting address is deleted.
+	// Delete indicates an existing address is deleted.
 	Delete
 )
 
 // Update defines a name resolution update. Notice that it is not valid having both
 // empty string Addr and nil Metadata in an Update.
+//
+// Deprecated: please use package resolver.
 type Update struct {
 	// Op indicates the operation of the update.
 	Op Operation
@@ -43,12 +49,16 @@ type Update struct {
 }
 
 // Resolver creates a Watcher for a target to track its resolution changes.
+//
+// Deprecated: please use package resolver.
 type Resolver interface {
 	// Resolve creates a Watcher for target.
 	Resolve(target string) (Watcher, error)
 }
 
 // Watcher watches for the updates on the specified target.
+//
+// Deprecated: please use package resolver.
 type Watcher interface {
 	// Next blocks until an update or error happens. It may return one or more
 	// updates. The first call should get the full set of the results. It should

vendor/google.golang.org/grpc/picker_wrapper.go

@@ -19,12 +19,17 @@
 package grpc
 
 import (
+	"io"
 	"sync"
+	"sync/atomic"
 
 	"golang.org/x/net/context"
 	"google.golang.org/grpc/balancer"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/grpclog"
+	"google.golang.org/grpc/internal/channelz"
+	"google.golang.org/grpc/metadata"
+	"google.golang.org/grpc/resolver"
 	"google.golang.org/grpc/status"
 	"google.golang.org/grpc/transport"
 )
@@ -36,13 +41,57 @@ type pickerWrapper struct {
 	done       bool
 	blockingCh chan struct{}
 	picker     balancer.Picker
+
+	// The latest connection happened.
+	connErrMu sync.Mutex
+	connErr   error
+
+	stickinessMDKey atomic.Value
+	stickiness      *stickyStore
 }
 
 func newPickerWrapper() *pickerWrapper {
-	bp := &pickerWrapper{blockingCh: make(chan struct{})}
+	bp := &pickerWrapper{
+		blockingCh: make(chan struct{}),
+		stickiness: newStickyStore(),
+	}
 	return bp
 }
 
+func (bp *pickerWrapper) updateConnectionError(err error) {
+	bp.connErrMu.Lock()
+	bp.connErr = err
+	bp.connErrMu.Unlock()
+}
+
+func (bp *pickerWrapper) connectionError() error {
+	bp.connErrMu.Lock()
+	err := bp.connErr
+	bp.connErrMu.Unlock()
+	return err
+}
+
+func (bp *pickerWrapper) updateStickinessMDKey(newKey string) {
+	// No need to check ok because mdKey == "" if ok == false.
+	if oldKey, _ := bp.stickinessMDKey.Load().(string); oldKey != newKey {
+		bp.stickinessMDKey.Store(newKey)
+		bp.stickiness.reset(newKey)
+	}
+}
+
+func (bp *pickerWrapper) getStickinessMDKey() string {
+	// No need to check ok because mdKey == "" if ok == false.
+	mdKey, _ := bp.stickinessMDKey.Load().(string)
+	return mdKey
+}
+
+func (bp *pickerWrapper) clearStickinessState() {
+	if oldKey := bp.getStickinessMDKey(); oldKey != "" {
+		// There's no need to reset store if mdKey was "".
+		bp.stickiness.reset(oldKey)
+	}
+}
+
 // updatePicker is called by UpdateBalancerState. It unblocks all blocked pick.
 func (bp *pickerWrapper) updatePicker(p balancer.Picker) {
 	bp.mu.Lock()
@@ -57,6 +106,23 @@ func (bp *pickerWrapper) updatePicker(p balancer.Picker) {
 	bp.mu.Unlock()
 }
 
+func doneChannelzWrapper(acw *acBalancerWrapper, done func(balancer.DoneInfo)) func(balancer.DoneInfo) {
+	acw.mu.Lock()
+	ac := acw.ac
+	acw.mu.Unlock()
+	ac.incrCallsStarted()
+	return func(b balancer.DoneInfo) {
+		if b.Err != nil && b.Err != io.EOF {
+			ac.incrCallsFailed()
+		} else {
+			ac.incrCallsSucceeded()
+		}
+		if done != nil {
+			done(b)
+		}
+	}
+}
+
 // pick returns the transport that will be used for the RPC.
 // It may block in the following cases:
 // - there's no picker
@@ -65,6 +131,27 @@ func (bp *pickerWrapper) updatePicker(p balancer.Picker) {
 // - the subConn returned by the current picker is not READY
 // When one of these situations happens, pick blocks until the picker gets updated.
 func (bp *pickerWrapper) pick(ctx context.Context, failfast bool, opts balancer.PickOptions) (transport.ClientTransport, func(balancer.DoneInfo), error) {
+
+	mdKey := bp.getStickinessMDKey()
+	stickyKey, isSticky := stickyKeyFromContext(ctx, mdKey)
+
+	// Potential race here: if stickinessMDKey is updated after the above two
+	// lines, and this pick is a sticky pick, the following put could add an
+	// entry to sticky store with an outdated sticky key.
+	//
+	// The solution: keep the current md key in sticky store, and at the
+	// beginning of each get/put, check the mdkey against store.curMDKey.
+	//  - Cons: one more string comparing for each get/put.
+	//  - Pros: the string matching happens inside get/put, so the overhead for
+	//  non-sticky RPCs will be minimal.
+
+	if isSticky {
+		if t, ok := bp.stickiness.get(mdKey, stickyKey); ok {
+			// Done function returned is always nil.
+			return t, nil, nil
+		}
+	}
+
 	var (
 		p  balancer.Picker
 		ch chan struct{}
@@ -97,7 +184,7 @@ func (bp *pickerWrapper) pick(ctx context.Context, failfast bool, opts balancer.
 		p = bp.picker
 		bp.mu.Unlock()
 
-		subConn, put, err := p.Pick(ctx, opts)
+		subConn, done, err := p.Pick(ctx, opts)
 
 		if err != nil {
 			switch err {
@@ -107,7 +194,7 @@ func (bp *pickerWrapper) pick(ctx context.Context, failfast bool, opts balancer.
 				if !failfast {
 					continue
 				}
-				return nil, nil, status.Errorf(codes.Unavailable, "%v", err)
+				return nil, nil, status.Errorf(codes.Unavailable, "%v, latest connection error: %v", err, bp.connectionError())
 			default:
 				// err is some other error.
 				return nil, nil, toRPCErr(err)
@@ -120,7 +207,13 @@ func (bp *pickerWrapper) pick(ctx context.Context, failfast bool, opts balancer.
 			continue
 		}
 		if t, ok := acw.getAddrConn().getReadyTransport(); ok {
-			return t, put, nil
+			if isSticky {
+				bp.stickiness.put(mdKey, stickyKey, acw)
+			}
+			if channelz.IsOn() {
+				return t, doneChannelzWrapper(acw, done), nil
+			}
+			return t, done, nil
 		}
 		grpclog.Infof("blockingPicker: the picked transport is not ready, loop back to repick")
 		// If ok == false, ac.state is not READY.
@@ -139,3 +232,105 @@ func (bp *pickerWrapper) close() {
 	bp.done = true
 	close(bp.blockingCh)
 }
+
+const stickinessKeyCountLimit = 1000
+
+type stickyStoreEntry struct {
+	acw  *acBalancerWrapper
+	addr resolver.Address
+}
+
+type stickyStore struct {
+	mu sync.Mutex
+	// curMDKey is check before every get/put to avoid races. The operation will
+	// abort immediately when the given mdKey is different from the curMDKey.
+	curMDKey string
+	store    *linkedMap
+}
+
+func newStickyStore() *stickyStore {
+	return &stickyStore{
+		store: newLinkedMap(),
+	}
+}
+
+// reset clears the map in stickyStore, and set the currentMDKey to newMDKey.
+func (ss *stickyStore) reset(newMDKey string) {
+	ss.mu.Lock()
+	ss.curMDKey = newMDKey
+	ss.store.clear()
+	ss.mu.Unlock()
+}
+
+// stickyKey is the key to look up in store. mdKey will be checked against
+// curMDKey to avoid races.
+func (ss *stickyStore) put(mdKey, stickyKey string, acw *acBalancerWrapper) {
+	ss.mu.Lock()
+	defer ss.mu.Unlock()
+	if mdKey != ss.curMDKey {
+		return
+	}
+	// TODO(stickiness): limit the total number of entries.
+	ss.store.put(stickyKey, &stickyStoreEntry{
+		acw:  acw,
+		addr: acw.getAddrConn().getCurAddr(),
+	})
+	if ss.store.len() > stickinessKeyCountLimit {
+		ss.store.removeOldest()
+	}
+}
+
+// stickyKey is the key to look up in store. mdKey will be checked against
+// curMDKey to avoid races.
+func (ss *stickyStore) get(mdKey, stickyKey string) (transport.ClientTransport, bool) {
+	ss.mu.Lock()
+	defer ss.mu.Unlock()
+	if mdKey != ss.curMDKey {
+		return nil, false
+	}
+	entry, ok := ss.store.get(stickyKey)
+	if !ok {
+		return nil, false
+	}
+	ac := entry.acw.getAddrConn()
+	if ac.getCurAddr() != entry.addr {
+		ss.store.remove(stickyKey)
+		return nil, false
+	}
+	t, ok := ac.getReadyTransport()
+	if !ok {
+		ss.store.remove(stickyKey)
+		return nil, false
+	}
+	return t, true
+}
+
+// Get one value from metadata in ctx with key stickinessMDKey.
+//
+// It returns "", false if stickinessMDKey is an empty string.
+func stickyKeyFromContext(ctx context.Context, stickinessMDKey string) (string, bool) {
+	if stickinessMDKey == "" {
+		return "", false
+	}
+
+	md, added, ok := metadata.FromOutgoingContextRaw(ctx)
+	if !ok {
+		return "", false
+	}
+
+	if vv, ok := md[stickinessMDKey]; ok {
+		if len(vv) > 0 {
+			return vv[0], true
+		}
+	}
+
+	for _, ss := range added {
+		for i := 0; i < len(ss)-1; i += 2 {
+			if ss[i] == stickinessMDKey {
+				return ss[i+1], true
+			}
+		}
+	}
+
+	return "", false
+}

vendor/google.golang.org/grpc/pickfirst.go

@@ -26,6 +26,9 @@ import (
 	"google.golang.org/grpc/resolver"
 )
 
+// PickFirstBalancerName is the name of the pick_first balancer.
+const PickFirstBalancerName = "pick_first"
+
 func newPickfirstBuilder() balancer.Builder {
 	return &pickfirstBuilder{}
 }
@@ -37,7 +40,7 @@ func (*pickfirstBuilder) Build(cc balancer.ClientConn, opt balancer.BuildOptions
 }
 
 func (*pickfirstBuilder) Name() string {
-	return "pickfirst"
+	return PickFirstBalancerName
 }
 
 type pickfirstBalancer struct {
@@ -57,14 +60,20 @@ func (b *pickfirstBalancer) HandleResolvedAddrs(addrs []resolver.Address, err er
 			return
 		}
 		b.cc.UpdateBalancerState(connectivity.Idle, &picker{sc: b.sc})
+		b.sc.Connect()
 	} else {
 		b.sc.UpdateAddresses(addrs)
+		b.sc.Connect()
 	}
 }
 
 func (b *pickfirstBalancer) HandleSubConnStateChange(sc balancer.SubConn, s connectivity.State) {
 	grpclog.Infof("pickfirstBalancer: HandleSubConnStateChange: %p, %v", sc, s)
-	if b.sc != sc || s == connectivity.Shutdown {
+	if b.sc != sc {
+		grpclog.Infof("pickfirstBalancer: ignored state change because sc is not recognized")
+		return
+	}
+	if s == connectivity.Shutdown {
 		b.sc = nil
 		return
 	}
@@ -93,3 +102,7 @@ func (p *picker) Pick(ctx context.Context, opts balancer.PickOptions) (balancer.
 	}
 	return p.sc, nil, nil
 }
+
+func init() {
+	balancer.Register(newPickfirstBuilder())
+}

vendor/google.golang.org/grpc/proxy.go

@@ -82,8 +82,7 @@ func doHTTPConnectHandshake(ctx context.Context, conn net.Conn, addr string) (_
 		Header: map[string][]string{"User-Agent": {grpcUA}},
 	})
 
-	req = req.WithContext(ctx)
+	if err := sendHTTPRequest(ctx, req, conn); err != nil {
-	if err := req.Write(conn); err != nil {
 		return nil, fmt.Errorf("failed to write the HTTP request: %v", err)
 	}
 

vendor/google.golang.org/grpc/resolver/BUILD

@@ -17,7 +17,11 @@ filegroup(
 
 filegroup(
     name = "all-srcs",
-    srcs = [":package-srcs"],
+    srcs = [
+        ":package-srcs",
+        "//vendor/google.golang.org/grpc/resolver/dns:all-srcs",
+        "//vendor/google.golang.org/grpc/resolver/passthrough:all-srcs",
+    ],
     tags = ["automanaged"],
     visibility = ["//visibility:public"],
 )

vendor/google.golang.org/grpc/resolver/dns/BUILD

@@ -0,0 +1,33 @@
+load("@io_bazel_rules_go//go:def.bzl", "go_library")
+
+go_library(
+    name = "go_default_library",
+    srcs = [
+        "dns_resolver.go",
+        "go17.go",
+        "go18.go",
+    ],
+    importmap = "k8s.io/kubernetes/vendor/google.golang.org/grpc/resolver/dns",
+    importpath = "google.golang.org/grpc/resolver/dns",
+    visibility = ["//visibility:public"],
+    deps = [
+        "//vendor/golang.org/x/net/context:go_default_library",
+        "//vendor/google.golang.org/grpc/grpclog:go_default_library",
+        "//vendor/google.golang.org/grpc/internal/grpcrand:go_default_library",
+        "//vendor/google.golang.org/grpc/resolver:go_default_library",
+    ],
+)
+
+filegroup(
+    name = "package-srcs",
+    srcs = glob(["**"]),
+    tags = ["automanaged"],
+    visibility = ["//visibility:private"],
+)
+
+filegroup(
+    name = "all-srcs",
+    srcs = [":package-srcs"],
+    tags = ["automanaged"],
+    visibility = ["//visibility:public"],
+)

vendor/google.golang.org/grpc/resolver/dns/dns_resolver.go

@@ -0,0 +1,381 @@
+/*
+ *
+ * Copyright 2017 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+// Package dns implements a dns resolver to be installed as the default resolver
+// in grpc.
+package dns
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"net"
+	"os"
+	"strconv"
+	"strings"
+	"sync"
+	"time"
+
+	"golang.org/x/net/context"
+	"google.golang.org/grpc/grpclog"
+	"google.golang.org/grpc/internal/grpcrand"
+	"google.golang.org/grpc/resolver"
+)
+
+func init() {
+	resolver.Register(NewBuilder())
+}
+
+const (
+	defaultPort = "443"
+	defaultFreq = time.Minute * 30
+	golang      = "GO"
+	// In DNS, service config is encoded in a TXT record via the mechanism
+	// described in RFC-1464 using the attribute name grpc_config.
+	txtAttribute = "grpc_config="
+)
+
+var (
+	errMissingAddr = errors.New("missing address")
+)
+
+// NewBuilder creates a dnsBuilder which is used to factory DNS resolvers.
+func NewBuilder() resolver.Builder {
+	return &dnsBuilder{freq: defaultFreq}
+}
+
+type dnsBuilder struct {
+	// frequency of polling the DNS server.
+	freq time.Duration
+}
+
+// Build creates and starts a DNS resolver that watches the name resolution of the target.
+func (b *dnsBuilder) Build(target resolver.Target, cc resolver.ClientConn, opts resolver.BuildOption) (resolver.Resolver, error) {
+	if target.Authority != "" {
+		return nil, fmt.Errorf("Default DNS resolver does not support custom DNS server")
+	}
+	host, port, err := parseTarget(target.Endpoint)
+	if err != nil {
+		return nil, err
+	}
+
+	// IP address.
+	if net.ParseIP(host) != nil {
+		host, _ = formatIP(host)
+		addr := []resolver.Address{{Addr: host + ":" + port}}
+		i := &ipResolver{
+			cc: cc,
+			ip: addr,
+			rn: make(chan struct{}, 1),
+			q:  make(chan struct{}),
+		}
+		cc.NewAddress(addr)
+		go i.watcher()
+		return i, nil
+	}
+
+	// DNS address (non-IP).
+	ctx, cancel := context.WithCancel(context.Background())
+	d := &dnsResolver{
+		freq:                 b.freq,
+		host:                 host,
+		port:                 port,
+		ctx:                  ctx,
+		cancel:               cancel,
+		cc:                   cc,
+		t:                    time.NewTimer(0),
+		rn:                   make(chan struct{}, 1),
+		disableServiceConfig: opts.DisableServiceConfig,
+	}
+
+	d.wg.Add(1)
+	go d.watcher()
+	return d, nil
+}
+
+// Scheme returns the naming scheme of this resolver builder, which is "dns".
+func (b *dnsBuilder) Scheme() string {
+	return "dns"
+}
+
+// ipResolver watches for the name resolution update for an IP address.
+type ipResolver struct {
+	cc resolver.ClientConn
+	ip []resolver.Address
+	// rn channel is used by ResolveNow() to force an immediate resolution of the target.
+	rn chan struct{}
+	q  chan struct{}
+}
+
+// ResolveNow resend the address it stores, no resolution is needed.
+func (i *ipResolver) ResolveNow(opt resolver.ResolveNowOption) {
+	select {
+	case i.rn <- struct{}{}:
+	default:
+	}
+}
+
+// Close closes the ipResolver.
+func (i *ipResolver) Close() {
+	close(i.q)
+}
+
+func (i *ipResolver) watcher() {
+	for {
+		select {
+		case <-i.rn:
+			i.cc.NewAddress(i.ip)
+		case <-i.q:
+			return
+		}
+	}
+}
+
+// dnsResolver watches for the name resolution update for a non-IP target.
+type dnsResolver struct {
+	freq   time.Duration
+	host   string
+	port   string
+	ctx    context.Context
+	cancel context.CancelFunc
+	cc     resolver.ClientConn
+	// rn channel is used by ResolveNow() to force an immediate resolution of the target.
+	rn chan struct{}
+	t  *time.Timer
+	// wg is used to enforce Close() to return after the watcher() goroutine has finished.
+	// Otherwise, data race will be possible. [Race Example] in dns_resolver_test we
+	// replace the real lookup functions with mocked ones to facilitate testing.
+	// If Close() doesn't wait for watcher() goroutine finishes, race detector sometimes
+	// will warns lookup (READ the lookup function pointers) inside watcher() goroutine
+	// has data race with replaceNetFunc (WRITE the lookup function pointers).
+	wg                   sync.WaitGroup
+	disableServiceConfig bool
+}
+
+// ResolveNow invoke an immediate resolution of the target that this dnsResolver watches.
+func (d *dnsResolver) ResolveNow(opt resolver.ResolveNowOption) {
+	select {
+	case d.rn <- struct{}{}:
+	default:
+	}
+}
+
+// Close closes the dnsResolver.
+func (d *dnsResolver) Close() {
+	d.cancel()
+	d.wg.Wait()
+	d.t.Stop()
+}
+
+func (d *dnsResolver) watcher() {
+	defer d.wg.Done()
+	for {
+		select {
+		case <-d.ctx.Done():
+			return
+		case <-d.t.C:
+		case <-d.rn:
+		}
+		result, sc := d.lookup()
+		// Next lookup should happen after an interval defined by d.freq.
+		d.t.Reset(d.freq)
+		d.cc.NewServiceConfig(sc)
+		d.cc.NewAddress(result)
+	}
+}
+
+func (d *dnsResolver) lookupSRV() []resolver.Address {
+	var newAddrs []resolver.Address
+	_, srvs, err := lookupSRV(d.ctx, "grpclb", "tcp", d.host)
+	if err != nil {
+		grpclog.Infof("grpc: failed dns SRV record lookup due to %v.\n", err)
+		return nil
+	}
+	for _, s := range srvs {
+		lbAddrs, err := lookupHost(d.ctx, s.Target)
+		if err != nil {
+			grpclog.Infof("grpc: failed load balancer address dns lookup due to %v.\n", err)
+			continue
+		}
+		for _, a := range lbAddrs {
+			a, ok := formatIP(a)
+			if !ok {
+				grpclog.Errorf("grpc: failed IP parsing due to %v.\n", err)
+				continue
+			}
+			addr := a + ":" + strconv.Itoa(int(s.Port))
+			newAddrs = append(newAddrs, resolver.Address{Addr: addr, Type: resolver.GRPCLB, ServerName: s.Target})
+		}
+	}
+	return newAddrs
+}
+
+func (d *dnsResolver) lookupTXT() string {
+	ss, err := lookupTXT(d.ctx, d.host)
+	if err != nil {
+		grpclog.Infof("grpc: failed dns TXT record lookup due to %v.\n", err)
+		return ""
+	}
+	var res string
+	for _, s := range ss {
+		res += s
+	}
+
+	// TXT record must have "grpc_config=" attribute in order to be used as service config.
+	if !strings.HasPrefix(res, txtAttribute) {
+		grpclog.Warningf("grpc: TXT record %v missing %v attribute", res, txtAttribute)
+		return ""
+	}
+	return strings.TrimPrefix(res, txtAttribute)
+}
+
+func (d *dnsResolver) lookupHost() []resolver.Address {
+	var newAddrs []resolver.Address
+	addrs, err := lookupHost(d.ctx, d.host)
+	if err != nil {
+		grpclog.Warningf("grpc: failed dns A record lookup due to %v.\n", err)
+		return nil
+	}
+	for _, a := range addrs {
+		a, ok := formatIP(a)
+		if !ok {
+			grpclog.Errorf("grpc: failed IP parsing due to %v.\n", err)
+			continue
+		}
+		addr := a + ":" + d.port
+		newAddrs = append(newAddrs, resolver.Address{Addr: addr})
+	}
+	return newAddrs
+}
+
+func (d *dnsResolver) lookup() ([]resolver.Address, string) {
+	newAddrs := d.lookupSRV()
+	// Support fallback to non-balancer address.
+	newAddrs = append(newAddrs, d.lookupHost()...)
+	if d.disableServiceConfig {
+		return newAddrs, ""
+	}
+	sc := d.lookupTXT()
+	return newAddrs, canaryingSC(sc)
+}
+
+// formatIP returns ok = false if addr is not a valid textual representation of an IP address.
+// If addr is an IPv4 address, return the addr and ok = true.
+// If addr is an IPv6 address, return the addr enclosed in square brackets and ok = true.
+func formatIP(addr string) (addrIP string, ok bool) {
+	ip := net.ParseIP(addr)
+	if ip == nil {
+		return "", false
+	}
+	if ip.To4() != nil {
+		return addr, true
+	}
+	return "[" + addr + "]", true
+}
+
+// parseTarget takes the user input target string, returns formatted host and port info.
+// If target doesn't specify a port, set the port to be the defaultPort.
+// If target is in IPv6 format and host-name is enclosed in sqarue brackets, brackets
+// are strippd when setting the host.
+// examples:
+// target: "www.google.com" returns host: "www.google.com", port: "443"
+// target: "ipv4-host:80" returns host: "ipv4-host", port: "80"
+// target: "[ipv6-host]" returns host: "ipv6-host", port: "443"
+// target: ":80" returns host: "localhost", port: "80"
+// target: ":" returns host: "localhost", port: "443"
+func parseTarget(target string) (host, port string, err error) {
+	if target == "" {
+		return "", "", errMissingAddr
+	}
+	if ip := net.ParseIP(target); ip != nil {
+		// target is an IPv4 or IPv6(without brackets) address
+		return target, defaultPort, nil
+	}
+	if host, port, err = net.SplitHostPort(target); err == nil {
+		// target has port, i.e ipv4-host:port, [ipv6-host]:port, host-name:port
+		if host == "" {
+			// Keep consistent with net.Dial(): If the host is empty, as in ":80", the local system is assumed.
+			host = "localhost"
+		}
+		if port == "" {
+			// If the port field is empty(target ends with colon), e.g. "[::1]:", defaultPort is used.
+			port = defaultPort
+		}
+		return host, port, nil
+	}
+	if host, port, err = net.SplitHostPort(target + ":" + defaultPort); err == nil {
+		// target doesn't have port
+		return host, port, nil
+	}
+	return "", "", fmt.Errorf("invalid target address %v, error info: %v", target, err)
+}
+
+type rawChoice struct {
+	ClientLanguage *[]string        `json:"clientLanguage,omitempty"`
+	Percentage     *int             `json:"percentage,omitempty"`
+	ClientHostName *[]string        `json:"clientHostName,omitempty"`
+	ServiceConfig  *json.RawMessage `json:"serviceConfig,omitempty"`
+}
+
+func containsString(a *[]string, b string) bool {
+	if a == nil {
+		return true
+	}
+	for _, c := range *a {
+		if c == b {
+			return true
+		}
+	}
+	return false
+}
+
+func chosenByPercentage(a *int) bool {
+	if a == nil {
+		return true
+	}
+	return grpcrand.Intn(100)+1 <= *a
+}
+
+func canaryingSC(js string) string {
+	if js == "" {
+		return ""
+	}
+	var rcs []rawChoice
+	err := json.Unmarshal([]byte(js), &rcs)
+	if err != nil {
+		grpclog.Warningf("grpc: failed to parse service config json string due to %v.\n", err)
+		return ""
+	}
+	cliHostname, err := os.Hostname()
+	if err != nil {
+		grpclog.Warningf("grpc: failed to get client hostname due to %v.\n", err)
+		return ""
+	}
+	var sc string
+	for _, c := range rcs {
+		if !containsString(c.ClientLanguage, golang) ||
+			!chosenByPercentage(c.Percentage) ||
+			!containsString(c.ClientHostName, cliHostname) ||
+			c.ServiceConfig == nil {
+			continue
+		}
+		sc = string(*c.ServiceConfig)
+		break
+	}
+	return sc
+}

vendor/google.golang.org/grpc/resolver/dns/go17.go

@@ -0,0 +1,35 @@
+// +build go1.6, !go1.8
+
+/*
+ *
+ * Copyright 2017 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package dns
+
+import (
+	"net"
+
+	"golang.org/x/net/context"
+)
+
+var (
+	lookupHost = func(ctx context.Context, host string) ([]string, error) { return net.LookupHost(host) }
+	lookupSRV  = func(ctx context.Context, service, proto, name string) (string, []*net.SRV, error) {
+		return net.LookupSRV(service, proto, name)
+	}
+	lookupTXT = func(ctx context.Context, name string) ([]string, error) { return net.LookupTXT(name) }
+)

vendor/google.golang.org/grpc/resolver/dns/go18.go

@@ -0,0 +1,29 @@
+// +build go1.8
+
+/*
+ *
+ * Copyright 2017 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package dns
+
+import "net"
+
+var (
+	lookupHost = net.DefaultResolver.LookupHost
+	lookupSRV  = net.DefaultResolver.LookupSRV
+	lookupTXT  = net.DefaultResolver.LookupTXT
+)

vendor/google.golang.org/grpc/resolver/passthrough/BUILD

@@ -0,0 +1,24 @@
+load("@io_bazel_rules_go//go:def.bzl", "go_library")
+
+go_library(
+    name = "go_default_library",
+    srcs = ["passthrough.go"],
+    importmap = "k8s.io/kubernetes/vendor/google.golang.org/grpc/resolver/passthrough",
+    importpath = "google.golang.org/grpc/resolver/passthrough",
+    visibility = ["//visibility:public"],
+    deps = ["//vendor/google.golang.org/grpc/resolver:go_default_library"],
+)
+
+filegroup(
+    name = "package-srcs",
+    srcs = glob(["**"]),
+    tags = ["automanaged"],
+    visibility = ["//visibility:private"],
+)
+
+filegroup(
+    name = "all-srcs",
+    srcs = [":package-srcs"],
+    tags = ["automanaged"],
+    visibility = ["//visibility:public"],
+)

vendor/google.golang.org/grpc/resolver/passthrough/passthrough.go

@@ -0,0 +1,57 @@
+/*
+ *
+ * Copyright 2017 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+// Package passthrough implements a pass-through resolver. It sends the target
+// name without scheme back to gRPC as resolved address.
+package passthrough
+
+import "google.golang.org/grpc/resolver"
+
+const scheme = "passthrough"
+
+type passthroughBuilder struct{}
+
+func (*passthroughBuilder) Build(target resolver.Target, cc resolver.ClientConn, opts resolver.BuildOption) (resolver.Resolver, error) {
+	r := &passthroughResolver{
+		target: target,
+		cc:     cc,
+	}
+	r.start()
+	return r, nil
+}
+
+func (*passthroughBuilder) Scheme() string {
+	return scheme
+}
+
+type passthroughResolver struct {
+	target resolver.Target
+	cc     resolver.ClientConn
+}
+
+func (r *passthroughResolver) start() {
+	r.cc.NewAddress([]resolver.Address{{Addr: r.target.Endpoint}})
+}
+
+func (*passthroughResolver) ResolveNow(o resolver.ResolveNowOption) {}
+
+func (*passthroughResolver) Close() {}
+
+func init() {
+	resolver.Register(&passthroughBuilder{})
+}

vendor/google.golang.org/grpc/resolver/resolver.go

@@ -24,42 +24,42 @@ var (
 	// m is a map from scheme to resolver builder.
 	m = make(map[string]Builder)
 	// defaultScheme is the default scheme to use.
-	defaultScheme string
+	defaultScheme = "passthrough"
 )
 
 // TODO(bar) install dns resolver in init(){}.
 
-// Register registers the resolver builder to the resolver map.
+// Register registers the resolver builder to the resolver map. b.Scheme will be
-// b.Scheme will be used as the scheme registered with this builder.
+// used as the scheme registered with this builder.
+//
+// NOTE: this function must only be called during initialization time (i.e. in
+// an init() function), and is not thread-safe. If multiple Resolvers are
+// registered with the same name, the one registered last will take effect.
 func Register(b Builder) {
 	m[b.Scheme()] = b
 }
 
 // Get returns the resolver builder registered with the given scheme.
-// If no builder is register with the scheme, the default scheme will
+//
-// be used.
+// If no builder is register with the scheme, nil will be returned.
-// If the default scheme is not modified, "dns" will be the default
-// scheme, and the preinstalled dns resolver will be used.
-// If the default scheme is modified, and a resolver is registered with
-// the scheme, that resolver will be returned.
-// If the default scheme is modified, and no resolver is registered with
-// the scheme, nil will be returned.
 func Get(scheme string) Builder {
 	if b, ok := m[scheme]; ok {
 		return b
 	}
-	if b, ok := m[defaultScheme]; ok {
-		return b
-	}
 	return nil
 }
 
 // SetDefaultScheme sets the default scheme that will be used.
-// The default default scheme is "dns".
+// The default default scheme is "passthrough".
 func SetDefaultScheme(scheme string) {
 	defaultScheme = scheme
 }
 
+// GetDefaultScheme gets the default scheme that will be used.
+func GetDefaultScheme() string {
+	return defaultScheme
+}
+
 // AddressType indicates the address type returned by name resolution.
 type AddressType uint8
 
@@ -78,7 +78,9 @@ type Address struct {
 	// Type is the type of this address.
 	Type AddressType
 	// ServerName is the name of this address.
-	// It's the name of the grpc load balancer, which will be used for authentication.
+	//
+	// e.g. if Type is GRPCLB, ServerName should be the name of the remote load
+	// balancer, not the name of the backend.
 	ServerName string
 	// Metadata is the information associated with Addr, which may be used
 	// to make load balancing decision.
@@ -88,10 +90,17 @@ type Address struct {
 // BuildOption includes additional information for the builder to create
 // the resolver.
 type BuildOption struct {
+	// DisableServiceConfig indicates whether resolver should fetch service config data.
+	DisableServiceConfig bool
 }
 
 // ClientConn contains the callbacks for resolver to notify any updates
 // to the gRPC ClientConn.
+//
+// This interface is to be implemented by gRPC. Users should not need a
+// brand new implementation of this interface. For the situations like
+// testing, the new implementation should embed this interface. This allows
+// gRPC to add new methods to this interface.
 type ClientConn interface {
 	// NewAddress is called by resolver to notify ClientConn a new list
 	// of resolved addresses.
@@ -128,8 +137,10 @@ type ResolveNowOption struct{}
 // Resolver watches for the updates on the specified target.
 // Updates include address updates and service config updates.
 type Resolver interface {
-	// ResolveNow will be called by gRPC to try to resolve the target name again.
+	// ResolveNow will be called by gRPC to try to resolve the target name
-	// It's just a hint, resolver can ignore this if it's not necessary.
+	// again. It's just a hint, resolver can ignore this if it's not necessary.
+	//
+	// It could be called multiple times concurrently.
 	ResolveNow(ResolveNowOption)
 	// Close closes the resolver.
 	Close()

vendor/google.golang.org/grpc/resolver_conn_wrapper.go

@@ -19,6 +19,7 @@
 package grpc
 
 import (
+	"fmt"
 	"strings"
 
 	"google.golang.org/grpc/grpclog"
@@ -36,39 +37,43 @@ type ccResolverWrapper struct {
 }
 
 // split2 returns the values from strings.SplitN(s, sep, 2).
-// If sep is not found, it returns "", s instead.
+// If sep is not found, it returns ("", s, false) instead.
-func split2(s, sep string) (string, string) {
+func split2(s, sep string) (string, string, bool) {
 	spl := strings.SplitN(s, sep, 2)
 	if len(spl) < 2 {
-		return "", s
+		return "", "", false
 	}
-	return spl[0], spl[1]
+	return spl[0], spl[1], true
 }
 
 // parseTarget splits target into a struct containing scheme, authority and
 // endpoint.
+//
+// If target is not a valid scheme://authority/endpoint, it returns {Endpoint:
+// target}.
 func parseTarget(target string) (ret resolver.Target) {
-	ret.Scheme, ret.Endpoint = split2(target, "://")
+	var ok bool
-	ret.Authority, ret.Endpoint = split2(ret.Endpoint, "/")
+	ret.Scheme, ret.Endpoint, ok = split2(target, "://")
+	if !ok {
+		return resolver.Target{Endpoint: target}
+	}
+	ret.Authority, ret.Endpoint, ok = split2(ret.Endpoint, "/")
+	if !ok {
+		return resolver.Target{Endpoint: target}
+	}
 	return ret
 }
 
 // newCCResolverWrapper parses cc.target for scheme and gets the resolver
-// builder for this scheme. It then builds the resolver and starts the
+// builder for this scheme and builds the resolver. The monitoring goroutine
-// monitoring goroutine for it.
+// for it is not started yet and can be created by calling start().
 //
-// This function could return nil, nil, in tests for old behaviors.
+// If withResolverBuilder dial option is set, the specified resolver will be
-// TODO(bar) never return nil, nil when DNS becomes the default resolver.
+// used instead.
 func newCCResolverWrapper(cc *ClientConn) (*ccResolverWrapper, error) {
-	target := parseTarget(cc.target)
+	rb := cc.dopts.resolverBuilder
-	grpclog.Infof("dialing to target with scheme: %q", target.Scheme)
-
-	rb := resolver.Get(target.Scheme)
 	if rb == nil {
-		// TODO(bar) return error when DNS becomes the default (implemented and
+		return nil, fmt.Errorf("could not get resolver for scheme: %q", cc.parsedTarget.Scheme)
-		// registered by DNS package).
-		grpclog.Infof("could not get resolver for scheme: %q", target.Scheme)
-		return nil, nil
 	}
 
 	ccr := &ccResolverWrapper{
@@ -79,15 +84,18 @@ func newCCResolverWrapper(cc *ClientConn) (*ccResolverWrapper, error) {
 	}
 
 	var err error
-	ccr.resolver, err = rb.Build(target, ccr, resolver.BuildOption{})
+	ccr.resolver, err = rb.Build(cc.parsedTarget, ccr, resolver.BuildOption{DisableServiceConfig: cc.dopts.disableServiceConfig})
 	if err != nil {
 		return nil, err
 	}
-	go ccr.watcher()
 	return ccr, nil
 }
 
-// watcher processes address updates and service config updates sequencially.
+func (ccr *ccResolverWrapper) start() {
+	go ccr.watcher()
+}
+
+// watcher processes address updates and service config updates sequentially.
 // Otherwise, we need to resolve possible races between address and service
 // config (e.g. they specify different balancer types).
 func (ccr *ccResolverWrapper) watcher() {
@@ -100,20 +108,31 @@ func (ccr *ccResolverWrapper) watcher() {
 
 		select {
 		case addrs := <-ccr.addrCh:
-			grpclog.Infof("ccResolverWrapper: sending new addresses to balancer wrapper: %v", addrs)
+			select {
-			// TODO(bar switching) this should never be nil. Pickfirst should be default.
+			case <-ccr.done:
-			if ccr.cc.balancerWrapper != nil {
+				return
-				// TODO(bar switching) create balancer if it's nil?
+			default:
-				ccr.cc.balancerWrapper.handleResolvedAddrs(addrs, nil)
 			}
+			grpclog.Infof("ccResolverWrapper: sending new addresses to cc: %v", addrs)
+			ccr.cc.handleResolvedAddrs(addrs, nil)
 		case sc := <-ccr.scCh:
+			select {
+			case <-ccr.done:
+				return
+			default:
+			}
 			grpclog.Infof("ccResolverWrapper: got new service config: %v", sc)
+			ccr.cc.handleServiceConfig(sc)
 		case <-ccr.done:
 			return
 		}
 	}
 }
 
+func (ccr *ccResolverWrapper) resolveNow(o resolver.ResolveNowOption) {
+	ccr.resolver.ResolveNow(o)
+}
+
 func (ccr *ccResolverWrapper) close() {
 	ccr.resolver.Close()
 	close(ccr.done)
@@ -129,7 +148,7 @@ func (ccr *ccResolverWrapper) NewAddress(addrs []resolver.Address) {
 }
 
 // NewServiceConfig is called by the resolver implemenetion to send service
-// configs to gPRC.
+// configs to gRPC.
 func (ccr *ccResolverWrapper) NewServiceConfig(sc string) {
 	select {
 	case <-ccr.scCh: