[VOL-5486] Fix deprecated versions
Change-Id: I3e03ea246020547ae75fa92ce8cf5cbba7e8f3bb
Signed-off-by: Abhay Kumar <abhay.kumar@radisys.com>
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/providers/prometheus/LICENSE b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/providers/prometheus/LICENSE
new file mode 100644
index 0000000..b2b0650
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/providers/prometheus/LICENSE
@@ -0,0 +1,201 @@
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diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/providers/prometheus/client_metrics.go b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/providers/prometheus/client_metrics.go
new file mode 100644
index 0000000..5c8ba20
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/providers/prometheus/client_metrics.go
@@ -0,0 +1,117 @@
+// Copyright (c) The go-grpc-middleware Authors.
+// Licensed under the Apache License 2.0.
+
+package prometheus
+
+import (
+ "github.com/grpc-ecosystem/go-grpc-middleware/v2/interceptors"
+ "github.com/prometheus/client_golang/prometheus"
+ "google.golang.org/grpc"
+)
+
+// ClientMetrics represents a collection of metrics to be registered on a
+// Prometheus metrics registry for a gRPC client.
+type ClientMetrics struct {
+ clientStartedCounter *prometheus.CounterVec
+ clientHandledCounter *prometheus.CounterVec
+ clientStreamMsgReceived *prometheus.CounterVec
+ clientStreamMsgSent *prometheus.CounterVec
+
+ // clientHandledHistogram can be nil
+ clientHandledHistogram *prometheus.HistogramVec
+ // clientStreamRecvHistogram can be nil
+ clientStreamRecvHistogram *prometheus.HistogramVec
+ // clientStreamSendHistogram can be nil
+ clientStreamSendHistogram *prometheus.HistogramVec
+}
+
+// NewClientMetrics returns a new ClientMetrics object.
+// NOTE: Remember to register ClientMetrics object using prometheus registry
+// e.g. prometheus.MustRegister(myClientMetrics).
+func NewClientMetrics(opts ...ClientMetricsOption) *ClientMetrics {
+ var config clientMetricsConfig
+ config.apply(opts)
+ return &ClientMetrics{
+ clientStartedCounter: prometheus.NewCounterVec(
+ config.counterOpts.apply(prometheus.CounterOpts{
+ Name: "grpc_client_started_total",
+ Help: "Total number of RPCs started on the client.",
+ }), []string{"grpc_type", "grpc_service", "grpc_method"}),
+
+ clientHandledCounter: prometheus.NewCounterVec(
+ config.counterOpts.apply(prometheus.CounterOpts{
+ Name: "grpc_client_handled_total",
+ Help: "Total number of RPCs completed by the client, regardless of success or failure.",
+ }), []string{"grpc_type", "grpc_service", "grpc_method", "grpc_code"}),
+
+ clientStreamMsgReceived: prometheus.NewCounterVec(
+ config.counterOpts.apply(prometheus.CounterOpts{
+ Name: "grpc_client_msg_received_total",
+ Help: "Total number of RPC stream messages received by the client.",
+ }), []string{"grpc_type", "grpc_service", "grpc_method"}),
+
+ clientStreamMsgSent: prometheus.NewCounterVec(
+ config.counterOpts.apply(prometheus.CounterOpts{
+ Name: "grpc_client_msg_sent_total",
+ Help: "Total number of gRPC stream messages sent by the client.",
+ }), []string{"grpc_type", "grpc_service", "grpc_method"}),
+
+ clientHandledHistogram: config.clientHandledHistogram,
+ clientStreamRecvHistogram: config.clientStreamRecvHistogram,
+ clientStreamSendHistogram: config.clientStreamSendHistogram,
+ }
+}
+
+// Describe sends the super-set of all possible descriptors of metrics
+// collected by this Collector to the provided channel and returns once
+// the last descriptor has been sent.
+func (m *ClientMetrics) Describe(ch chan<- *prometheus.Desc) {
+ m.clientStartedCounter.Describe(ch)
+ m.clientHandledCounter.Describe(ch)
+ m.clientStreamMsgReceived.Describe(ch)
+ m.clientStreamMsgSent.Describe(ch)
+ if m.clientHandledHistogram != nil {
+ m.clientHandledHistogram.Describe(ch)
+ }
+ if m.clientStreamRecvHistogram != nil {
+ m.clientStreamRecvHistogram.Describe(ch)
+ }
+ if m.clientStreamSendHistogram != nil {
+ m.clientStreamSendHistogram.Describe(ch)
+ }
+}
+
+// Collect is called by the Prometheus registry when collecting
+// metrics. The implementation sends each collected metric via the
+// provided channel and returns once the last metric has been sent.
+func (m *ClientMetrics) Collect(ch chan<- prometheus.Metric) {
+ m.clientStartedCounter.Collect(ch)
+ m.clientHandledCounter.Collect(ch)
+ m.clientStreamMsgReceived.Collect(ch)
+ m.clientStreamMsgSent.Collect(ch)
+ if m.clientHandledHistogram != nil {
+ m.clientHandledHistogram.Collect(ch)
+ }
+ if m.clientStreamRecvHistogram != nil {
+ m.clientStreamRecvHistogram.Collect(ch)
+ }
+ if m.clientStreamSendHistogram != nil {
+ m.clientStreamSendHistogram.Collect(ch)
+ }
+}
+
+// UnaryClientInterceptor is a gRPC client-side interceptor that provides Prometheus monitoring for Unary RPCs.
+func (m *ClientMetrics) UnaryClientInterceptor(opts ...Option) grpc.UnaryClientInterceptor {
+ return interceptors.UnaryClientInterceptor(&reportable{
+ opts: opts,
+ clientMetrics: m,
+ })
+}
+
+// StreamClientInterceptor is a gRPC client-side interceptor that provides Prometheus monitoring for Streaming RPCs.
+func (m *ClientMetrics) StreamClientInterceptor(opts ...Option) grpc.StreamClientInterceptor {
+ return interceptors.StreamClientInterceptor(&reportable{
+ opts: opts,
+ clientMetrics: m,
+ })
+}
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/providers/prometheus/client_options.go b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/providers/prometheus/client_options.go
new file mode 100644
index 0000000..c267167
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/providers/prometheus/client_options.go
@@ -0,0 +1,77 @@
+// Copyright (c) The go-grpc-middleware Authors.
+// Licensed under the Apache License 2.0.
+
+package prometheus
+
+import (
+ "github.com/prometheus/client_golang/prometheus"
+)
+
+type clientMetricsConfig struct {
+ counterOpts counterOptions
+ // clientHandledHistogram can be nil.
+ clientHandledHistogram *prometheus.HistogramVec
+ // clientStreamRecvHistogram can be nil.
+ clientStreamRecvHistogram *prometheus.HistogramVec
+ // clientStreamSendHistogram can be nil.
+ clientStreamSendHistogram *prometheus.HistogramVec
+}
+
+type ClientMetricsOption func(*clientMetricsConfig)
+
+func (c *clientMetricsConfig) apply(opts []ClientMetricsOption) {
+ for _, o := range opts {
+ o(c)
+ }
+}
+
+func WithClientCounterOptions(opts ...CounterOption) ClientMetricsOption {
+ return func(o *clientMetricsConfig) {
+ o.counterOpts = opts
+ }
+}
+
+// WithClientHandlingTimeHistogram turns on recording of handling time of RPCs.
+// Histogram metrics can be very expensive for Prometheus to retain and query.
+func WithClientHandlingTimeHistogram(opts ...HistogramOption) ClientMetricsOption {
+ return func(o *clientMetricsConfig) {
+ o.clientHandledHistogram = prometheus.NewHistogramVec(
+ histogramOptions(opts).apply(prometheus.HistogramOpts{
+ Name: "grpc_client_handling_seconds",
+ Help: "Histogram of response latency (seconds) of the gRPC until it is finished by the application.",
+ Buckets: prometheus.DefBuckets,
+ }),
+ []string{"grpc_type", "grpc_service", "grpc_method"},
+ )
+ }
+}
+
+// WithClientStreamRecvHistogram turns on recording of single message receive time of streaming RPCs.
+// Histogram metrics can be very expensive for Prometheus to retain and query.
+func WithClientStreamRecvHistogram(opts ...HistogramOption) ClientMetricsOption {
+ return func(o *clientMetricsConfig) {
+ o.clientStreamRecvHistogram = prometheus.NewHistogramVec(
+ histogramOptions(opts).apply(prometheus.HistogramOpts{
+ Name: "grpc_client_msg_recv_handling_seconds",
+ Help: "Histogram of response latency (seconds) of the gRPC single message receive.",
+ Buckets: prometheus.DefBuckets,
+ }),
+ []string{"grpc_type", "grpc_service", "grpc_method"},
+ )
+ }
+}
+
+// WithClientStreamSendHistogram turns on recording of single message send time of streaming RPCs.
+// Histogram metrics can be very expensive for Prometheus to retain and query.
+func WithClientStreamSendHistogram(opts ...HistogramOption) ClientMetricsOption {
+ return func(o *clientMetricsConfig) {
+ o.clientStreamSendHistogram = prometheus.NewHistogramVec(
+ histogramOptions(opts).apply(prometheus.HistogramOpts{
+ Name: "grpc_client_msg_send_handling_seconds",
+ Help: "Histogram of response latency (seconds) of the gRPC single message send.",
+ Buckets: prometheus.DefBuckets,
+ }),
+ []string{"grpc_type", "grpc_service", "grpc_method"},
+ )
+ }
+}
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/providers/prometheus/constants.go b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/providers/prometheus/constants.go
new file mode 100644
index 0000000..5c36923
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/providers/prometheus/constants.go
@@ -0,0 +1,23 @@
+// Copyright (c) The go-grpc-middleware Authors.
+// Licensed under the Apache License 2.0.
+
+package prometheus
+
+type grpcType string
+
+// grpcType describes all types of grpc connection.
+const (
+ Unary grpcType = "unary"
+ ClientStream grpcType = "client_stream"
+ ServerStream grpcType = "server_stream"
+ BidiStream grpcType = "bidi_stream"
+)
+
+// Kind describes whether interceptor is a client or server type.
+type Kind string
+
+// Enum for Client and Server Kind.
+const (
+ KindClient Kind = "client"
+ KindServer Kind = "server"
+)
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/providers/prometheus/doc.go b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/providers/prometheus/doc.go
new file mode 100644
index 0000000..b62f17e
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/providers/prometheus/doc.go
@@ -0,0 +1,8 @@
+// Copyright (c) The go-grpc-middleware Authors.
+// Licensed under the Apache License 2.0.
+
+/*
+Package prometheus provides a standalone interceptor for metrics. It's next iteration of deprecated https://github.com/grpc-ecosystem/go-grpc-prometheus.
+See https://github.com/grpc-ecosystem/go-grpc-middleware/tree/main/examples for example.
+*/
+package prometheus
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/providers/prometheus/options.go b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/providers/prometheus/options.go
new file mode 100644
index 0000000..bdd171e
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/providers/prometheus/options.go
@@ -0,0 +1,129 @@
+// Copyright (c) The go-grpc-middleware Authors.
+// Licensed under the Apache License 2.0.
+
+package prometheus
+
+import (
+ "github.com/prometheus/client_golang/prometheus"
+ "google.golang.org/grpc"
+ "google.golang.org/grpc/status"
+)
+
+// FromError returns a grpc status. If the error code is neither a valid grpc status nor a context error, codes.Unknown
+// will be set.
+func FromError(err error) *status.Status {
+ s, ok := status.FromError(err)
+ // Mirror what the grpc server itself does, i.e. also convert context errors to status
+ if !ok {
+ s = status.FromContextError(err)
+ }
+ return s
+}
+
+// A CounterOption lets you add options to Counter metrics using With* funcs.
+type CounterOption func(*prometheus.CounterOpts)
+
+type counterOptions []CounterOption
+
+func (co counterOptions) apply(o prometheus.CounterOpts) prometheus.CounterOpts {
+ for _, f := range co {
+ f(&o)
+ }
+ return o
+}
+
+// WithConstLabels allows you to add ConstLabels to Counter metrics.
+func WithConstLabels(labels prometheus.Labels) CounterOption {
+ return func(o *prometheus.CounterOpts) {
+ o.ConstLabels = labels
+ }
+}
+
+// WithSubsystem allows you to add a Subsystem to Counter metrics.
+func WithSubsystem(subsystem string) CounterOption {
+ return func(o *prometheus.CounterOpts) {
+ o.Subsystem = subsystem
+ }
+}
+
+// A HistogramOption lets you add options to Histogram metrics using With*
+// funcs.
+type HistogramOption func(*prometheus.HistogramOpts)
+
+type histogramOptions []HistogramOption
+
+func (ho histogramOptions) apply(o prometheus.HistogramOpts) prometheus.HistogramOpts {
+ for _, f := range ho {
+ f(&o)
+ }
+ return o
+}
+
+// WithHistogramBuckets allows you to specify custom bucket ranges for histograms if EnableHandlingTimeHistogram is on.
+func WithHistogramBuckets(buckets []float64) HistogramOption {
+ return func(o *prometheus.HistogramOpts) { o.Buckets = buckets }
+}
+
+// WithHistogramOpts allows you to specify HistogramOpts but makes sure the correct name and label is used.
+// This function is helpful when specifying more than just the buckets, like using NativeHistograms.
+func WithHistogramOpts(opts *prometheus.HistogramOpts) HistogramOption {
+ // TODO: This isn't ideal either if new fields are added to prometheus.HistogramOpts.
+ // Maybe we can change the interface to accept abitrary HistogramOpts and
+ // only make sure to overwrite the necessary fields (name, labels).
+ return func(o *prometheus.HistogramOpts) {
+ o.Buckets = opts.Buckets
+ o.NativeHistogramBucketFactor = opts.NativeHistogramBucketFactor
+ o.NativeHistogramZeroThreshold = opts.NativeHistogramZeroThreshold
+ o.NativeHistogramMaxBucketNumber = opts.NativeHistogramMaxBucketNumber
+ o.NativeHistogramMinResetDuration = opts.NativeHistogramMinResetDuration
+ o.NativeHistogramMaxZeroThreshold = opts.NativeHistogramMaxZeroThreshold
+ }
+}
+
+// WithHistogramConstLabels allows you to add custom ConstLabels to
+// histograms metrics.
+func WithHistogramConstLabels(labels prometheus.Labels) HistogramOption {
+ return func(o *prometheus.HistogramOpts) {
+ o.ConstLabels = labels
+ }
+}
+
+// WithHistogramSubsystem allows you to add a Subsystem to histograms metrics.
+func WithHistogramSubsystem(subsystem string) HistogramOption {
+ return func(o *prometheus.HistogramOpts) {
+ o.Subsystem = subsystem
+ }
+}
+
+func typeFromMethodInfo(mInfo *grpc.MethodInfo) grpcType {
+ if !mInfo.IsClientStream && !mInfo.IsServerStream {
+ return Unary
+ }
+ if mInfo.IsClientStream && !mInfo.IsServerStream {
+ return ClientStream
+ }
+ if !mInfo.IsClientStream && mInfo.IsServerStream {
+ return ServerStream
+ }
+ return BidiStream
+}
+
+// An Option lets you add options to prometheus interceptors using With* funcs.
+type Option func(*config)
+
+type config struct {
+ exemplarFn exemplarFromCtxFn
+}
+
+func (c *config) apply(opts []Option) {
+ for _, o := range opts {
+ o(c)
+ }
+}
+
+// WithExemplarFromContext sets function that will be used to deduce exemplar for all counter and histogram metrics.
+func WithExemplarFromContext(exemplarFn exemplarFromCtxFn) Option {
+ return func(o *config) {
+ o.exemplarFn = exemplarFn
+ }
+}
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/providers/prometheus/reporter.go b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/providers/prometheus/reporter.go
new file mode 100644
index 0000000..96c49ad
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/providers/prometheus/reporter.go
@@ -0,0 +1,113 @@
+// Copyright (c) The go-grpc-middleware Authors.
+// Licensed under the Apache License 2.0.
+
+package prometheus
+
+import (
+ "context"
+ "time"
+
+ "github.com/grpc-ecosystem/go-grpc-middleware/v2/interceptors"
+ "github.com/prometheus/client_golang/prometheus"
+)
+
+type reporter struct {
+ clientMetrics *ClientMetrics
+ serverMetrics *ServerMetrics
+ typ interceptors.GRPCType
+ service, method string
+ kind Kind
+ exemplar prometheus.Labels
+}
+
+func (r *reporter) PostCall(err error, rpcDuration time.Duration) {
+ // get status code from error
+ status := FromError(err)
+ code := status.Code()
+
+ // perform handling of metrics from code
+ switch r.kind {
+ case KindServer:
+ r.incrementWithExemplar(r.serverMetrics.serverHandledCounter, string(r.typ), r.service, r.method, code.String())
+ if r.serverMetrics.serverHandledHistogram != nil {
+ r.observeWithExemplar(r.serverMetrics.serverHandledHistogram, rpcDuration.Seconds(), string(r.typ), r.service, r.method)
+ }
+
+ case KindClient:
+ r.incrementWithExemplar(r.clientMetrics.clientHandledCounter, string(r.typ), r.service, r.method, code.String())
+ if r.clientMetrics.clientHandledHistogram != nil {
+ r.observeWithExemplar(r.clientMetrics.clientHandledHistogram, rpcDuration.Seconds(), string(r.typ), r.service, r.method)
+ }
+ }
+}
+
+func (r *reporter) PostMsgSend(_ any, _ error, sendDuration time.Duration) {
+ switch r.kind {
+ case KindServer:
+ r.incrementWithExemplar(r.serverMetrics.serverStreamMsgSent, string(r.typ), r.service, r.method)
+ case KindClient:
+ r.incrementWithExemplar(r.clientMetrics.clientStreamMsgSent, string(r.typ), r.service, r.method)
+ if r.clientMetrics.clientStreamSendHistogram != nil {
+ r.observeWithExemplar(r.clientMetrics.clientStreamSendHistogram, sendDuration.Seconds(), string(r.typ), r.service, r.method)
+ }
+ }
+}
+
+func (r *reporter) PostMsgReceive(_ any, _ error, recvDuration time.Duration) {
+ switch r.kind {
+ case KindServer:
+ r.incrementWithExemplar(r.serverMetrics.serverStreamMsgReceived, string(r.typ), r.service, r.method)
+ case KindClient:
+ r.incrementWithExemplar(r.clientMetrics.clientStreamMsgReceived, string(r.typ), r.service, r.method)
+ if r.clientMetrics.clientStreamRecvHistogram != nil {
+ r.observeWithExemplar(r.clientMetrics.clientStreamRecvHistogram, recvDuration.Seconds(), string(r.typ), r.service, r.method)
+ }
+ }
+}
+
+type reportable struct {
+ clientMetrics *ClientMetrics
+ serverMetrics *ServerMetrics
+
+ opts []Option
+}
+
+func (rep *reportable) ServerReporter(ctx context.Context, meta interceptors.CallMeta) (interceptors.Reporter, context.Context) {
+ return rep.reporter(ctx, rep.serverMetrics, nil, meta, KindServer)
+}
+
+func (rep *reportable) ClientReporter(ctx context.Context, meta interceptors.CallMeta) (interceptors.Reporter, context.Context) {
+ return rep.reporter(ctx, nil, rep.clientMetrics, meta, KindClient)
+}
+
+func (rep *reportable) reporter(ctx context.Context, sm *ServerMetrics, cm *ClientMetrics, meta interceptors.CallMeta, kind Kind) (interceptors.Reporter, context.Context) {
+ var c config
+ c.apply(rep.opts)
+ r := &reporter{
+ clientMetrics: cm,
+ serverMetrics: sm,
+ typ: meta.Typ,
+ service: meta.Service,
+ method: meta.Method,
+ kind: kind,
+ }
+ if c.exemplarFn != nil {
+ r.exemplar = c.exemplarFn(ctx)
+ }
+
+ switch kind {
+ case KindClient:
+ r.incrementWithExemplar(r.clientMetrics.clientStartedCounter, string(r.typ), r.service, r.method)
+ case KindServer:
+ r.incrementWithExemplar(r.serverMetrics.serverStartedCounter, string(r.typ), r.service, r.method)
+ }
+ return r, ctx
+}
+
+func (r *reporter) incrementWithExemplar(c *prometheus.CounterVec, lvals ...string) {
+ c.WithLabelValues(lvals...).(prometheus.ExemplarAdder).AddWithExemplar(1, r.exemplar)
+}
+
+func (r *reporter) observeWithExemplar(h *prometheus.HistogramVec, value float64, lvals ...string) {
+ h.WithLabelValues(lvals...).(prometheus.ExemplarObserver).ObserveWithExemplar(value, r.exemplar)
+}
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/providers/prometheus/server_metrics.go b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/providers/prometheus/server_metrics.go
new file mode 100644
index 0000000..def21e5
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/providers/prometheus/server_metrics.go
@@ -0,0 +1,124 @@
+// Copyright (c) The go-grpc-middleware Authors.
+// Licensed under the Apache License 2.0.
+
+package prometheus
+
+import (
+ "github.com/grpc-ecosystem/go-grpc-middleware/v2/interceptors"
+ "github.com/prometheus/client_golang/prometheus"
+ "google.golang.org/grpc"
+ "google.golang.org/grpc/reflection"
+)
+
+// ServerMetrics represents a collection of metrics to be registered on a
+// Prometheus metrics registry for a gRPC server.
+type ServerMetrics struct {
+ serverStartedCounter *prometheus.CounterVec
+ serverHandledCounter *prometheus.CounterVec
+ serverStreamMsgReceived *prometheus.CounterVec
+ serverStreamMsgSent *prometheus.CounterVec
+ // serverHandledHistogram can be nil.
+ serverHandledHistogram *prometheus.HistogramVec
+}
+
+// NewServerMetrics returns a new ServerMetrics object that has server interceptor methods.
+// NOTE: Remember to register ServerMetrics object by using prometheus registry
+// e.g. prometheus.MustRegister(myServerMetrics).
+func NewServerMetrics(opts ...ServerMetricsOption) *ServerMetrics {
+ var config serverMetricsConfig
+ config.apply(opts)
+ return &ServerMetrics{
+ serverStartedCounter: prometheus.NewCounterVec(
+ config.counterOpts.apply(prometheus.CounterOpts{
+ Name: "grpc_server_started_total",
+ Help: "Total number of RPCs started on the server.",
+ }), []string{"grpc_type", "grpc_service", "grpc_method"}),
+ serverHandledCounter: prometheus.NewCounterVec(
+ config.counterOpts.apply(prometheus.CounterOpts{
+ Name: "grpc_server_handled_total",
+ Help: "Total number of RPCs completed on the server, regardless of success or failure.",
+ }), []string{"grpc_type", "grpc_service", "grpc_method", "grpc_code"}),
+ serverStreamMsgReceived: prometheus.NewCounterVec(
+ config.counterOpts.apply(prometheus.CounterOpts{
+ Name: "grpc_server_msg_received_total",
+ Help: "Total number of RPC stream messages received on the server.",
+ }), []string{"grpc_type", "grpc_service", "grpc_method"}),
+ serverStreamMsgSent: prometheus.NewCounterVec(
+ config.counterOpts.apply(prometheus.CounterOpts{
+ Name: "grpc_server_msg_sent_total",
+ Help: "Total number of gRPC stream messages sent by the server.",
+ }), []string{"grpc_type", "grpc_service", "grpc_method"}),
+ serverHandledHistogram: config.serverHandledHistogram,
+ }
+}
+
+// Describe sends the super-set of all possible descriptors of metrics
+// collected by this Collector to the provided channel and returns once
+// the last descriptor has been sent.
+func (m *ServerMetrics) Describe(ch chan<- *prometheus.Desc) {
+ m.serverStartedCounter.Describe(ch)
+ m.serverHandledCounter.Describe(ch)
+ m.serverStreamMsgReceived.Describe(ch)
+ m.serverStreamMsgSent.Describe(ch)
+ if m.serverHandledHistogram != nil {
+ m.serverHandledHistogram.Describe(ch)
+ }
+}
+
+// Collect is called by the Prometheus registry when collecting
+// metrics. The implementation sends each collected metric via the
+// provided channel and returns once the last metric has been sent.
+func (m *ServerMetrics) Collect(ch chan<- prometheus.Metric) {
+ m.serverStartedCounter.Collect(ch)
+ m.serverHandledCounter.Collect(ch)
+ m.serverStreamMsgReceived.Collect(ch)
+ m.serverStreamMsgSent.Collect(ch)
+ if m.serverHandledHistogram != nil {
+ m.serverHandledHistogram.Collect(ch)
+ }
+}
+
+// InitializeMetrics initializes all metrics, with their appropriate null
+// value, for all gRPC methods registered on a gRPC server. This is useful, to
+// ensure that all metrics exist when collecting and querying.
+// NOTE: This might add significant cardinality and might not be needed in future version of Prometheus (created timestamp).
+func (m *ServerMetrics) InitializeMetrics(server reflection.ServiceInfoProvider) {
+ serviceInfo := server.GetServiceInfo()
+ for serviceName, info := range serviceInfo {
+ for _, mInfo := range info.Methods {
+ m.preRegisterMethod(serviceName, &mInfo)
+ }
+ }
+}
+
+// preRegisterMethod is invoked on Register of a Server, allowing all gRPC services labels to be pre-populated.
+func (m *ServerMetrics) preRegisterMethod(serviceName string, mInfo *grpc.MethodInfo) {
+ methodName := mInfo.Name
+ methodType := string(typeFromMethodInfo(mInfo))
+ // These are just references (no increments), as just referencing will create the labels but not set values.
+ _, _ = m.serverStartedCounter.GetMetricWithLabelValues(methodType, serviceName, methodName)
+ _, _ = m.serverStreamMsgReceived.GetMetricWithLabelValues(methodType, serviceName, methodName)
+ _, _ = m.serverStreamMsgSent.GetMetricWithLabelValues(methodType, serviceName, methodName)
+ if m.serverHandledHistogram != nil {
+ _, _ = m.serverHandledHistogram.GetMetricWithLabelValues(methodType, serviceName, methodName)
+ }
+ for _, code := range interceptors.AllCodes {
+ _, _ = m.serverHandledCounter.GetMetricWithLabelValues(methodType, serviceName, methodName, code.String())
+ }
+}
+
+// UnaryServerInterceptor is a gRPC server-side interceptor that provides Prometheus monitoring for Unary RPCs.
+func (m *ServerMetrics) UnaryServerInterceptor(opts ...Option) grpc.UnaryServerInterceptor {
+ return interceptors.UnaryServerInterceptor(&reportable{
+ opts: opts,
+ serverMetrics: m,
+ })
+}
+
+// StreamServerInterceptor is a gRPC server-side interceptor that provides Prometheus monitoring for Streaming RPCs.
+func (m *ServerMetrics) StreamServerInterceptor(opts ...Option) grpc.StreamServerInterceptor {
+ return interceptors.StreamServerInterceptor(&reportable{
+ opts: opts,
+ serverMetrics: m,
+ })
+}
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/providers/prometheus/server_options.go b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/providers/prometheus/server_options.go
new file mode 100644
index 0000000..39d4220
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/providers/prometheus/server_options.go
@@ -0,0 +1,48 @@
+// Copyright (c) The go-grpc-middleware Authors.
+// Licensed under the Apache License 2.0.
+
+package prometheus
+
+import (
+ "context"
+
+ "github.com/prometheus/client_golang/prometheus"
+)
+
+type exemplarFromCtxFn func(ctx context.Context) prometheus.Labels
+
+type serverMetricsConfig struct {
+ counterOpts counterOptions
+ // serverHandledHistogram can be nil.
+ serverHandledHistogram *prometheus.HistogramVec
+}
+
+type ServerMetricsOption func(*serverMetricsConfig)
+
+func (c *serverMetricsConfig) apply(opts []ServerMetricsOption) {
+ for _, o := range opts {
+ o(c)
+ }
+}
+
+// WithServerCounterOptions sets counter options.
+func WithServerCounterOptions(opts ...CounterOption) ServerMetricsOption {
+ return func(o *serverMetricsConfig) {
+ o.counterOpts = opts
+ }
+}
+
+// WithServerHandlingTimeHistogram turns on recording of handling time of RPCs.
+// Histogram metrics can be very expensive for Prometheus to retain and query.
+func WithServerHandlingTimeHistogram(opts ...HistogramOption) ServerMetricsOption {
+ return func(o *serverMetricsConfig) {
+ o.serverHandledHistogram = prometheus.NewHistogramVec(
+ histogramOptions(opts).apply(prometheus.HistogramOpts{
+ Name: "grpc_server_handling_seconds",
+ Help: "Histogram of response latency (seconds) of gRPC that had been application-level handled by the server.",
+ Buckets: prometheus.DefBuckets,
+ }),
+ []string{"grpc_type", "grpc_service", "grpc_method"},
+ )
+ }
+}