Problem Statement
What is the fastest rollback method?
Explanation
Traffic switching in Blue-Green deployment provides instant rollback (seconds) by redirecting load balancer to previous environment. No redeployment needed since old version still running. Other rollback methods: revert image tag (container rollback, minutes), redeploy previous version (rebuild pipeline, 10-30 minutes), database rollback (complex, may lose data), feature flag disable (instant for feature-flagged changes).
Rollback decision factors: severity (critical bugs require immediate rollback), user impact (how many affected), fix time (quick fix vs rollback), data integrity (can we rollback database?). Automated vs manual: automated rollback based on metrics (error rate spike), manual rollback for complex issues requiring human judgment.
Rollback best practices: maintain previous version availability, automate rollback process, test rollback procedures regularly, implement health checks triggering rollback, preserve data compatibility, communicate rollback to team. Understanding rollback strategies minimizes incident recovery time.
