Add Cloud Run worker OpenTelemetry sample - #528
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Adds cloud-run-worker/: a long-running Temporal worker for Google Cloud Run worker pools that uses the contrib/gcp/cloudrun OpenTelemetry plugin to export Core metrics and traces over OTLP/gRPC to a local OpenTelemetry Collector sidecar (worker + collector container manifest, Dockerfile, cloudbuild, README). Note: the SDK module contrib/gcp/cloudrun is not yet released, so go.mod temporarily uses local replace directives to resolve it against a sibling sdk-go checkout. Remove those before this is marked ready and pin the released module versions. Co-authored-by: Edward Amsden <edward.amsden@temporal.io> Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Verified by deploying the sample to Cloud Run: - Replace the invalid container dependsOn field with the run.googleapis.com/container-dependencies annotation (the WorkerPool API rejects dependsOn); matches the Java and Python samples. - Bind the collector health_check on 0.0.0.0:13133 so the Cloud Run startup probe can reach it (localhost fails the probe and the instance never starts). - Bump the module go directive to 1.26.0 to match contrib/gcp/cloudrun. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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Summary
Adds
cloud-run-worker/: a long-running Temporal worker for Google Cloud Run worker pools that uses the newcontrib/gcp/cloudrunOpenTelemetry plugin to export Core metrics and traces over OTLP/gRPC to a local OpenTelemetry Collector sidecar. Includes the worker + starter, a greeting workflow/activity, an OTel collector config (metrics →googlemanagedprometheuswith no batch processor; traces →googlecloud), a Cloud Run worker-pool manifest, a Dockerfile, and a README.Depends on the unreleased
go.temporal.io/sdk/contrib/gcp/cloudrun(and itsotlpworkerdependency) from temporalio/sdk-go#2588. To keep it buildable locally,go.modtemporarily uses two localreplacedirectives pointing at a siblingsdk-gocheckout. Before marking ready:contrib/opentelemetry/otlpworker, thencontrib/gcp/cloudrunreplacedirectives fromgo.modand pin the released versionsRelated
SDK PR: temporalio/sdk-go#2588. Cross-SDK Cloud Run OTel preview (Go/Java/Python/.NET).
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