Myth 4: Deployment Automatically Roll Back on Failure

Have you ever assumed that a failed Deployment would automatically roll back to the last working version? Many believe that Kubernetes automatically detects a failed rollout and reverts to the previous version. However, this is not entirely true.

Why This Myth Exists?

1. kubectl rollout undo exists, leading people to assume rollbacks are automatic.
2. Some CI/CD tools implement automatic rollback logic, making it seem like Kubernetes does it by default.
3. Kubernetes pauses a failed rollout but does not revert the change automatically.

The Reality:

By default, Kubernetes does not automatically rollback a failed Deployment. Instead, it: - Pauses the rollout if a newly updated pod crashes or fails health checks. - Keeps old running pods unchanged, preventing further failures. - Requires manual intervention to rollback or fix the issue.

Experiment & Validate

In Progress

Key Takeaways

• Kubernetes does not auto-rollback failed Deployments.
• It pauses rollouts, but you must manually trigger a rollback.
• Use health checks and CI/CD automation to enable safer rollbacks.