Which Kubernetes feature allows you to revert to an older version of an application during a problematic update?

Which Kubernetes feature allows you to revert to an older version of an application during a problematic update?

• A. Backups
• B. Snapshots
• C. Maintenance
• D. Rollbacks

Answer: (D)

Reverting to an earlier application version during a problematic update is handled by Kubernetes rollouts of Deployments. When you update a Deployment, Kubernetes creates a new ReplicaSet for the new version while still keeping the old one, so you can switch back if the new version has issues. You can undo the rollout to the previous revision (or specify a specific revision) and then monitor the rollout until the old version is serving again. You can also view the rollout history to see which revisions exist. This built-in rollback capability specifically targets the deployment’s version history, unlike backups or snapshots (which relate to data) or maintenance (a general upkeep task).

Reverting to an earlier application version during a problematic update is handled by Kubernetes rollouts of Deployments. When you update a Deployment, Kubernetes creates a new ReplicaSet for the new version while still keeping the old one, so you can switch back if the new version has issues. You can undo the rollout to the previous revision (or specify a specific revision) and then monitor the rollout until the old version is serving again. You can also view the rollout history to see which revisions exist. This built-in rollback capability specifically targets the deployment’s version history, unlike backups or snapshots (which relate to data) or maintenance (a general upkeep task).