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103 lines
3.6 KiB
Go
103 lines
3.6 KiB
Go
package telemetry
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import (
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"context"
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"time"
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"go.opentelemetry.io/otel/metric"
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"go.opentelemetry.io/otel/metric/instrument"
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"go.opentelemetry.io/otel/metric/instrument/asyncint64"
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"go.opentelemetry.io/otel/metric/instrument/syncint64"
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)
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// GRPCMetrics are gRPC server metrics
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type GRPCMetrics struct {
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meter metric.Meter
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syncRequestsCounter syncint64.Counter
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loginRequestsCounter syncint64.Counter
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getKeyRequestsCounter syncint64.Counter
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activeStreamsGauge asyncint64.Gauge
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syncRequestDuration syncint64.Histogram
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loginRequestDuration syncint64.Histogram
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ctx context.Context
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}
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// NewGRPCMetrics creates new GRPCMetrics struct and registers common metrics of the gRPC server
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func NewGRPCMetrics(ctx context.Context, meter metric.Meter) (*GRPCMetrics, error) {
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syncRequestsCounter, err := meter.SyncInt64().Counter("management.grpc.sync.request.counter", instrument.WithUnit("1"))
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if err != nil {
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return nil, err
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}
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loginRequestsCounter, err := meter.SyncInt64().Counter("management.grpc.login.request.counter", instrument.WithUnit("1"))
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if err != nil {
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return nil, err
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}
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getKeyRequestsCounter, err := meter.SyncInt64().Counter("management.grpc.key.request.counter", instrument.WithUnit("1"))
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if err != nil {
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return nil, err
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}
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activeStreamsGauge, err := meter.AsyncInt64().Gauge("management.grpc.connected.streams", instrument.WithUnit("1"))
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if err != nil {
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return nil, err
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}
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syncRequestDuration, err := meter.SyncInt64().Histogram("management.grpc.sync.request.duration.ms", instrument.WithUnit("milliseconds"))
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if err != nil {
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return nil, err
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}
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loginRequestDuration, err := meter.SyncInt64().Histogram("management.grpc.login.request.duration.ms", instrument.WithUnit("milliseconds"))
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if err != nil {
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return nil, err
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}
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return &GRPCMetrics{
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meter: meter,
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syncRequestsCounter: syncRequestsCounter,
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loginRequestsCounter: loginRequestsCounter,
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getKeyRequestsCounter: getKeyRequestsCounter,
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activeStreamsGauge: activeStreamsGauge,
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syncRequestDuration: syncRequestDuration,
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loginRequestDuration: loginRequestDuration,
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ctx: ctx,
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}, err
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}
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// CountSyncRequest counts the number of gRPC sync requests coming to the gRPC API
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func (grpcMetrics *GRPCMetrics) CountSyncRequest() {
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grpcMetrics.syncRequestsCounter.Add(grpcMetrics.ctx, 1)
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}
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// CountGetKeyRequest counts the number of gRPC get server key requests coming to the gRPC API
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func (grpcMetrics *GRPCMetrics) CountGetKeyRequest() {
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grpcMetrics.getKeyRequestsCounter.Add(grpcMetrics.ctx, 1)
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}
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// CountLoginRequest counts the number of gRPC login requests coming to the gRPC API
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func (grpcMetrics *GRPCMetrics) CountLoginRequest() {
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grpcMetrics.loginRequestsCounter.Add(grpcMetrics.ctx, 1)
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}
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// CountLoginRequestDuration counts the duration of the login gRPC requests
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func (grpcMetrics *GRPCMetrics) CountLoginRequestDuration(duration time.Duration) {
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grpcMetrics.loginRequestDuration.Record(grpcMetrics.ctx, duration.Milliseconds())
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}
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// CountSyncRequestDuration counts the duration of the sync gRPC requests
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func (grpcMetrics *GRPCMetrics) CountSyncRequestDuration(duration time.Duration) {
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grpcMetrics.syncRequestDuration.Record(grpcMetrics.ctx, duration.Milliseconds())
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}
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// RegisterConnectedStreams registers a function that collects number of active streams and feeds it to the metrics gauge.
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func (grpcMetrics *GRPCMetrics) RegisterConnectedStreams(producer func() int64) error {
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return grpcMetrics.meter.RegisterCallback(
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[]instrument.Asynchronous{
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grpcMetrics.activeStreamsGauge,
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},
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func(ctx context.Context) {
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grpcMetrics.activeStreamsGauge.Observe(ctx, producer())
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},
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)
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}
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