feat(instrumentation): add option to overwrite otlp service name/namespace/version with env var

docs/usage/opentelemetry.md

@@ -30,6 +30,11 @@ This means that Renovate sends traces via [OTLP/HTTP](https://opentelemetry.io/d
 To activate the instrumentation, you must set the `OTEL_EXPORTER_OTLP_ENDPOINT` environment variable.
 This variable controls the endpoint for the telemetry data.
 Once this endpoint is set, you can use all environment variables listed in the [OpenTelemetry specification](https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/configuration/sdk-environment-variables.md).
+You can also set the following environment variables:
+
+- `OTEL_SERVICE_NAME`: to control the service name that will be emitted in traces, defaults to `renovate`
+- `OTEL_SERVICE_NAMESPACE`: to control the service namespace that will be emitted in traces, defaults to `renovatebot.com`
+- `OTEL_SERVICE_VERSION`: to control the service version that will be emitted in traces, defaults to using the release version of Renovate
 
 ## Debugging
 

lib/instrumentation/index.ts

@@ -43,9 +43,12 @@ export function init(): void {
   const traceProvider = new NodeTracerProvider({
     resource: new Resource({
       // https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/resource/semantic_conventions/README.md#semantic-attributes-with-sdk-provided-default-value
-      [SemanticResourceAttributes.SERVICE_NAME]: 'renovate',
-      [SemanticResourceAttributes.SERVICE_NAMESPACE]: 'renovatebot.com',
-      [SemanticResourceAttributes.SERVICE_VERSION]: pkg.version,
+      [SemanticResourceAttributes.SERVICE_NAME]:
+        process.env.OTEL_SERVICE_NAME ?? 'renovate',
+      [SemanticResourceAttributes.SERVICE_NAMESPACE]:
+        process.env.OTEL_SERVICE_NAMESPACE ?? 'renovatebot.com',
+      [SemanticResourceAttributes.SERVICE_VERSION]:
+        process.env.OTEL_SERVICE_VERSION ?? pkg.version,
     }),
   });