Function traceClientFromEnv

internal/tracing/tracing.go:123–145

traceClientFromEnv creates a GRPC OTLP client based on OS environment variables. https://opentelemetry.io/docs/concepts/sdk-configuration/otlp-exporter-configuration/

()

//
// https://opentelemetry.io/docs/concepts/sdk-configuration/otlp-exporter-configuration/
func traceClientFromEnv() (otlptrace.Client, envMap) {
	hasOtelEndpointInEnv := false
	otelEnv := make(map[string]string)
	for _, kv := range os.Environ() {
		k, v, ok := strings.Cut(kv, "=")
		if !ok {
			continue
		}
		if strings.HasPrefix(k, "OTEL_") {
			otelEnv[k] = v
			if strings.HasSuffix(k, "ENDPOINT") {
				hasOtelEndpointInEnv = true
			}
		}
	}

	if !hasOtelEndpointInEnv {
		return nil, nil
	}

	client := otlptracegrpc.NewClient()
	return client, otelEnv
}