An incomplete certificate rotation stops GitHub Actions Larger Runners
GitHub says Actions Larger Runner jobs could not run for 6 hours 28 minutes on August 18, while runner and runner-group management failed in both the UI and API. A service certificate had been rotated in Key Vault but was not enabled at runtime.
Why it matters: The outage turns certificate rotation into a complete CI execution and control-plane failure for affected runner fleets. Rotation is not complete when a new secret exists; the runtime consumer, health checks, and rollback path must all prove the new…