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Overview

Datadog tracing libraries provide an implementation of the OpenTelemetry API for instrumenting your code. This means you can maintain vendor-neutral instrumentation of all your services, while still taking advantage of Datadog’s native implementation, features, and products. You can configure it to generate Datadog-style spans and traces to be processed by the Datadog tracing library for your language, and send those to Datadog.

By instrumenting your code with OpenTelemetry API:

  • Your code remains free of vendor-specific API calls.
  • Your code does not depend on Datadog tracing libraries at compile time (only runtime).
  • Your code does not use the deprecated OpenTracing API.

Replace the OpenTelemetry SDK with the Datadog tracing library in the instrumented application, and the traces produced by your running code can be processed, analyzed, and monitored alongside Datadog traces and in Datadog proprietary products.

For more information, read Interoperability of OpenTelemetry API and Datadog instrumented traces.

The Datadog tracing library, when configured as described here, accepts the spans and traces generated by OpenTelemetry-instrumented code, processes the telemetry, and sends it to Datadog. You can use this approach, for example, if your code has already been instrumented with the OpenTelemetry API, or if you want to instrument using the OpenTelemetry API, and you want to gain the benefits of using the Datadog tracing libraries without changing your code.

If you’re looking for a way to instrument your code with OpenTelemetry and then send span data to Datadog without going through the Datadog tracing library, see OpenTelemetry in Datadog.

Requirements and limitations

  • Datadog Go tracing library dd-trace-go version 1.5.0 or greater.
  • Go version 1.18 or greater.
  • The Datadog OpenTelemetry API implementation is dependent on upstream OpenTelemetry Go.

The following OpenTelemetry features are implemented in the Datadog library as noted:

FeatureSupport notes
OpenTelemetry Context propagationW3C Trace Context and Datadog header formats are enabled by default.
Span processorsUnsupported
Span ExportersUnsupported
Trace/span ID generatorsID generation is performed by the tracing library, with support for 128-bit trace IDs.

Configuring OpenTelemetry to use the Datadog trace provider

  1. Add your desired manual OpenTelemetry instrumentation to your Go code following the OpenTelemetry Go Manual Instrumentation documentation. Important! Where those instructions indicate that your code should call the OpenTelemetry SDK, call the Datadog tracing library instead.

  2. Install the OpenTelemetry package go.opentelemetry.io/otel using the command:

    go get go.opentelemetry.io/otel
    
  3. Install the Datadog OpenTelemetry wrapper package gopkg.in/DataDog/dd-trace-go.v1/ddtrace/opentelemetry using the command:

    go get gopkg.in/DataDog/dd-trace-go.v1/ddtrace/opentelemetry
    
  4. Import packages in the code:

    import (
      "go.opentelemetry.io/otel"
      ddotel "gopkg.in/DataDog/dd-trace-go.v1/ddtrace/opentelemetry"
    )
    
  5. Create a TracerProvider, optionally providing a set of options, that are specific to Datadog APM, and defer the Shutdown method, which stops the tracer:

    provider := ddotel.NewTracerProvider()
    defer provider.Shutdown()
    
  6. Use the Tracer Provider instance with the OpenTelemetry API to set the global TracerProvider:

    otel.SetTracerProvider(provider)
    
  7. Run your application.

Datadog combines these OpenTelemetry spans with other Datadog APM spans into a single trace of your application.