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GCP Professional Cloud Architect Practice Question

Your operations team manages a latency-sensitive trading API packaged as a container and deployed to a single-region Cloud Run service in europe-west1. You must release a new revision every week with (1) no perceptible downtime, (2) the ability to cut over gradually while observing a Cloud Monitoring alert on p95 latency, and (3) an instant rollback path if latency exceeds 50 ms. Which release strategy best meets these requirements?

  • Replace the existing revision by deploying the new image with the --revision-suffix flag so that Cloud Run automatically routes 100 % of requests to it; redeploy the previous image if rollback is needed.

  • Deploy the current and new revisions to europe-west1 and europe-west2 respectively and use weighted Cloud DNS records to progressively shift traffic between the two regions.

  • Deploy the new revision to the same Cloud Run service and use traffic splitting to initially send 5 % of requests to it, increasing or reducing the percentage based on observed latency.

  • Create a second Cloud Run service for the new revision and place both services behind an external HTTP(S) Load Balancer, then switch all traffic to the new backend when latency is acceptable.

GCP Professional Cloud Architect
Managing implementation
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