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observability.go
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observability.go
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// Copyright 2021 FerretDB Inc.
//
// 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 observability provides abstractions for tracing, metrics, etc.
//
// TODO https://github.com/FerretDB/FerretDB/issues/3244
package observability
import (
"context"
"time"
"go.opentelemetry.io/otel"
"go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp"
otelsdkresource "go.opentelemetry.io/otel/sdk/resource"
otelsdktrace "go.opentelemetry.io/otel/sdk/trace"
otelsemconv "go.opentelemetry.io/otel/semconv/v1.21.0"
"github.com/FerretDB/FerretDB/internal/util/must"
)
// SetupOtel sets up OpenTelemetry exporter with fixed values.
func SetupOtel(service string) func(context.Context) error {
exporter := must.NotFail(otlptracehttp.New(
context.TODO(),
otlptracehttp.WithEndpoint("127.0.0.1:4318"),
otlptracehttp.WithInsecure(),
))
tp := otelsdktrace.NewTracerProvider(
otelsdktrace.WithBatcher(exporter, otelsdktrace.WithBatchTimeout(time.Second)),
otelsdktrace.WithSampler(otelsdktrace.AlwaysSample()),
otelsdktrace.WithResource(otelsdkresource.NewSchemaless(
otelsemconv.ServiceNameKey.String(service),
)),
)
otel.SetTracerProvider(tp)
return tp.Shutdown
}