Maven / ArgoCD interview questions

How do you perform a rollback in ArgoCD?

ArgoCD stores a history of every sync operation for each Application, including the Git commit SHA, parameters, and manifests that were applied. Rolling back means telling ArgoCD to re-sync the Application to a specific previous revision from this history, overriding the current HEAD of the tracked branch.

Rollback via CLI

# View sync history
argocd app history my-app

# Roll back to history ID 3
argocd app rollback my-app 3

Rollback via UI

In the ArgoCD UI, navigate to the Application → History and Rollback tab. Each entry shows the commit SHA, time, and initiator. Click Rollback on any row to restore that state.

Important caveats:

A rollback puts the Application into an OutOfSync state relative to the current Git HEAD, because the cluster is now running a different revision than what Git currently says.
If automated sync or self-healing is enabled, ArgoCD will immediately re-sync back to HEAD after the rollback, undoing it. You must disable automated sync before rolling back if you want the rollback to persist.
The GitOps-native alternative to rollback is to revert the Git commit — this preserves the audit trail and lets ArgoCD sync forward to the reverted state rather than syncing backward.

History retention is configurable via server.app.revision.history.limit in argocd-cm (default is 10 revisions).

What sync status does an Application enter immediately after an ArgoCD rollback operation?OutOfSync — because the cluster is now running a different revision than the current Git HEAD

✓ Well done! The cluster diverges from HEAD after rollback, so ArgoCD correctly reports OutOfSync.

Synced — because ArgoCD considers the rollback revision as the new desired state

✗ Try again — ArgoCD always compares against the tracked Git revision; a rollback creates a mismatch.

Suspended — because automated sync is automatically disabled after a rollback

✗ Try again — ArgoCD does not automatically suspend; you must manually disable automated sync before rolling back.

Why is reverting a Git commit generally preferred over using argocd app rollback?Because argocd app rollback is slower than a Git revert

✗ Try again — speed is not the distinction; the reason is auditability and GitOps consistency.

A Git revert preserves the full audit trail and keeps Git as the source of truth without creating a diverged state

✓ Well done! A Git revert is a forward operation that ArgoCD syncs to normally, maintaining GitOps principles throughout.

Because argocd app rollback requires cluster-admin privileges that Git revert does not

✗ Try again — permissions are not the key distinction here.

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Maven / ArgoCD interview questions

How do you perform a rollback in ArgoCD?

Rollback via CLI

Rollback via UI

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