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feat: add basic latency metrics (#616)
* feat: add basic latency metrics * fix: align dockerfile's go version * review: simplify calculations
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,5 +1,5 @@ | ||
| # syntax=docker/dockerfile:1 | ||
| FROM golang:1.20 as builder | ||
| FROM golang:1.21 as builder | ||
| ARG VERSION | ||
| WORKDIR /build | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,100 @@ | ||
| // Package metrics provides prometheus metrics primitives to the rest of the app | ||
| package metrics | ||
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| import ( | ||
| "context" | ||
| "math" | ||
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| "go.opentelemetry.io/otel/exporters/prometheus" | ||
| otelapi "go.opentelemetry.io/otel/metric" | ||
| "go.opentelemetry.io/otel/sdk/metric" | ||
| "go.opentelemetry.io/otel/sdk/resource" | ||
| semconv "go.opentelemetry.io/otel/semconv/v1.24.0" | ||
| ) | ||
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| const ( | ||
| metricsNamespace = "mev-boost-relay" | ||
| ) | ||
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| var ( | ||
| meter otelapi.Meter | ||
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| GetPayloadLatencyHistogram otelapi.Float64Histogram | ||
| PublishBlockLatencyHistogram otelapi.Float64Histogram | ||
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| latencyBoundaries = otelapi.WithExplicitBucketBoundaries(func() []float64 { | ||
| base := math.Exp(math.Log(12.0) / 15.0) | ||
| res := make([]float64, 0, 31) | ||
| for i := -15; i < 16; i++ { | ||
| res = append(res, math.Pow(base, float64(i))) | ||
| } | ||
| return res | ||
| }()...) | ||
| ) | ||
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| func Setup(ctx context.Context) error { | ||
| for _, setup := range []func(context.Context) error{ | ||
| setupMeter, // must come first | ||
| setupGetPayloadLatency, | ||
| setupPublishBlockLatency, | ||
| } { | ||
| if err := setup(ctx); err != nil { | ||
| return err | ||
| } | ||
| } | ||
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| return nil | ||
| } | ||
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| func setupMeter(ctx context.Context) error { | ||
| res, err := resource.New(ctx, | ||
| resource.WithAttributes(semconv.ServiceName(metricsNamespace)), | ||
| ) | ||
| if err != nil { | ||
| return err | ||
| } | ||
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| exporter, err := prometheus.New( | ||
| prometheus.WithNamespace(metricsNamespace), | ||
| ) | ||
| if err != nil { | ||
| return err | ||
| } | ||
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| provider := metric.NewMeterProvider( | ||
| metric.WithReader(exporter), | ||
| metric.WithResource(res), | ||
| ) | ||
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| meter = provider.Meter(metricsNamespace) | ||
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| return nil | ||
| } | ||
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| func setupGetPayloadLatency(ctx context.Context) error { | ||
| latency, err := meter.Float64Histogram( | ||
| "get_payload_latency", | ||
| otelapi.WithDescription("statistics on the duration of getPayload requests execution"), | ||
| otelapi.WithUnit("ms"), | ||
| latencyBoundaries, | ||
| ) | ||
| GetPayloadLatencyHistogram = latency | ||
| if err != nil { | ||
| return err | ||
| } | ||
| return nil | ||
| } | ||
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| func setupPublishBlockLatency(ctx context.Context) error { | ||
| latency, err := meter.Float64Histogram( | ||
| "publish_block_latency", | ||
| otelapi.WithDescription("statistics on the duration of publishBlock requests sent to beacon node"), | ||
| otelapi.WithUnit("ms"), | ||
| latencyBoundaries, | ||
| ) | ||
| PublishBlockLatencyHistogram = latency | ||
| if err != nil { | ||
| return err | ||
| } | ||
| return nil | ||
| } |
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