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Goal Diagnose why a Cloud Run service experiences intermittent Too many connections errors against Cloud SQL during traffic bursts that trigger autoscaling. Constraints and Uncertainty Cloud Run scales instances independently; each instance initializes its own connection pool via the Cloud SQL connector or Auth Proxy sidecar. Cloud SQL enforces a max_connect
Goal Enable precise, non‑integer traffic allocation to revisions for canary and blue‑green deployments, such as 33.3%/33.3%/33.4% splits. Constraints The current Cloud Run Traffic Splitting API accepts only whole‑percentage values (e.g., 25%, 75%). Both the gcloud CLI and Cloud Console reject decimal inputs with validation errors. No public roadmap or releas
Teams using Cloud Run must decide whether to rely on the gcloud CLI default that marks services as private when the `--allow-unauthenticated` flag is omitted, or to explicitly declare `--no-allow-unauthenticated` in their deployment scripts. The CLI default changed in version 2023.08.00, shifting from an implicit public allowance to a private‑by‑default stan
CERTIFICATE_VERIFY_FAILED when mapping Cloud Run custom domain via CNAME Goal: Verify that a custom domain mapped to a Cloud Run service can be accessed over HTTPS without TLS hostname mismatch errors. The current setup uses a CNAME record pointing the subdomain to the Cloud Run service URL. Clients report CERTIFICATE_VERIFY_FAILED during TLS handshake. Cons
Goal: determine whether tail latency that appears only under concurrent requests through an HTTP(S) Load Balancer to Cloud Run originates at the integration boundary rather than the client or application. Cloud Run limits simultaneous requests per instance using the concurrency setting; excess requests queue or prompt new instances. The load balancer does no
Cloud Run Timeout Behavior The goal is to understand the precise server-side state of a Cloud Run execution when the initiating GCP client enforces a timeout or cancellation. Constraints and Uncertainty Timeout semantics are known to vary across different GCP services, and the exact behavior for Cloud Run execution upon client-side cancellation is not univer
Cloud Run Concurrency Behavior Under Sustained Traffic Cloud Run allows configuring request concurrency from 1 to 1000 using the --concurrency flag during deployment. When traffic arrives, instances scale from zero and handle requests up to the configured concurrency limit before additional instances are spawned. This scaling mechanism should distribute load
The goal is to determine the reliability of reversing a failed Cloud Run deployment by manually shifting 100% of traffic back to a previous immutable revision. In fully managed Cloud Run, the service does not natively migrate traffic away from a new revision if the container instances crash or return consistent 5xx errors. Traffic remains assigned to the lat
Designing outbound connectivity from a Cloud Run service to VPC-internal resources such as Cloud SQL or Memorystore requires choosing between two supported integration paths. The decision affects throughput, IP consumption, and egress cost, and is intended to be made before application-level optimization. Serverless VPC Access uses a managed connector deploy
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