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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,50 @@ | ||
| package metrics | ||
|
|
||
| import ( | ||
| "sync" | ||
|
|
||
| grpcprom "github.com/grpc-ecosystem/go-grpc-middleware/providers/prometheus" | ||
| "github.com/prometheus/client_golang/prometheus" | ||
| "google.golang.org/grpc" | ||
| "k8s.io/component-base/metrics/legacyregistry" | ||
| ) | ||
|
|
||
| var ( | ||
| // metricsList is a list of all raw metrics that should be registered always, regardless of any feature gate's value. | ||
| metricsList []prometheus.Collector | ||
| grpcServerMetrics *grpcprom.ServerMetrics | ||
| registerMetrics sync.Once | ||
| ) | ||
|
|
||
| func initMetrics() { | ||
| grpcServerMetrics = grpcprom.NewServerMetrics( | ||
| grpcprom.WithServerHandlingTimeHistogram( | ||
| grpcprom.WithHistogramBuckets([]float64{0.001, 0.01, 0.1, 0.3, 0.6, 1, 3, 6, 9, 20, 30, 60, 90, 120}), | ||
| ), | ||
| ) | ||
|
|
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| metricsList = []prometheus.Collector{ | ||
| grpcServerMetrics, | ||
| } | ||
| } | ||
|
|
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| // Register registers a list of metrics. | ||
| func Register() { | ||
| registerMetrics.Do(func() { | ||
| initMetrics() | ||
| for _, metric := range metricsList { | ||
| legacyregistry.RawMustRegister(metric) | ||
| } | ||
| }) | ||
| } | ||
|
|
||
| func GRPCMetricsOptions() []grpc.ServerOption { | ||
| return []grpc.ServerOption{ | ||
| grpc.ChainUnaryInterceptor( | ||
| grpcServerMetrics.UnaryServerInterceptor(), | ||
| ), | ||
| grpc.ChainStreamInterceptor( | ||
| grpcServerMetrics.StreamServerInterceptor(), | ||
| ), | ||
| } | ||
| } |
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