Rollback Made It Worse: 5-Layer CI/CD Auto-Rollback Architecture and 4 Production Pitfalls
Overview 2:47 AM, the alert chat exploded. A payment service’s P99 latency spiked from 80ms to 1200ms after a new version went live. The on-call engineer hit rollback immediately. kubectl rollout undo executed successfully, old version Pods came back up, traffic shifted back. The result? The service went completely down — because the new version had run a database migration script that changed the status column in the orders table from varchar(20) to tinyint....