OpenTelemetry-Go

Installation

This repository includes multiple packages. The api package contains core data types, interfaces and no-op implementations that comprise the OpenTelemetry API following the specification. The sdk package is the reference implementation of the API.

Libraries that produce telemetry data should only depend on api and defer the choice of the SDK to the application developer. Applications may depend on sdk or another package that implements the API.

To install the API and SDK packages,

$ go get -u go.opentelemetry.io/otel

Quick Start

package main

import (
	"context"
	"log"

	"go.opentelemetry.io/otel/api/global"
	"go.opentelemetry.io/otel/exporter/trace/stdout"
	sdktrace "go.opentelemetry.io/otel/sdk/trace"
)

func initTracer() {
	exporter, err := stdout.NewExporter(stdout.Options{PrettyPrint: true})
	if err != nil {
		log.Fatal(err)
	}
	tp, err := sdktrace.NewProvider(sdktrace.WithConfig(sdktrace.Config{DefaultSampler: sdktrace.AlwaysSample()}),
		sdktrace.WithSyncer(exporter))
	if err != nil {
		log.Fatal(err)
	}
	global.SetTraceProvider(tp)
}

func main() {
	initTracer()
	tracer := global.TraceProvider().Tracer("ex.com/basic")

	tracer.WithSpan(context.Background(), "foo",
		func(ctx context.Context) error {
			tracer.WithSpan(ctx, "bar",
				func(ctx context.Context) error {
					tracer.WithSpan(ctx, "baz",
						func(ctx context.Context) error {
							return nil
						},
					)
					return nil
				},
			)
			return nil
		},
	)
}

See the API documentation for more detail, and the opentelemetry-example-app for a complete example.

Compatible Exporters

See the Go packages depending upon sdk/export/trace and sdk/export/metric for a list of all exporters compatible with OpenTelemetry's Go SDK.

Contributing

See the contributing file.

Release Schedule

OpenTelemetry Go is under active development. Below is the release schedule for the Go library. The first version of the release isn't guaranteed to conform to a specific version of the specification, and future releases will not attempt to maintain backward compatibility with the alpha release.