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Datadog Trace Context propagator for OpenTelemetry

OpenTelemetry propagators are used to extract and inject context data from and into messages exchanged by applications. The propagator supported by this package is the Datadog Trace Context.

Trace context propagation

Span Context Size DD header key Size Text Format
TraceId 128 bits <--> x-datadog-trace-id 64 bits number base 10
SpanId 64 bits <--> x-datadog-parent-id 64 bits number base 10
Sampling decision 1 bit <--> x-datadog-sampling-priority bool "0" or "1"

You can find a getting started guide on opentelemetry.io.

Getting Started

go get github.com/SylvainDumas/opentelemetry-datadog-go

If you installed more packages than you intended, you can use go mod tidy to remove any unused packages.

import (
    //...
	"github.com/SylvainDumas/opentelemetry-datadog-go/propagators/tracecontext"
	"go.opentelemetry.io/otel"
)

func initTracerProvider() {
    // ...
	otel.SetTextMapPropagator(tracecontext.NewDefault())
}

Documentation