All 29 Sync Waves & Hooks questions
More in Sync Waves & Hooks
How do you run a database migration safely before deploying a new version? What is a Skip hook and when is it used? How are hook resources named and prevented from clashing across syncs? How long does ArgoCD wait between sync waves? What is a PostSync hook typically used for? Can hooks use sync waves to order among themselves? How do you notify an external system after a successful deployment using hooks? How do you seed initial data on first deployment only? How do hooks differ from plain resources with sync waves, and when do you choose each? How do you order a multi-tier application deployment with waves?
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ArgoCD › Sync Waves & Hooks

What is a PreSync hook typically used for?

Intermediate

Answer

PreSync hooks run before the main resources apply, ideal for preparation tasks that must succeed first: database schema migrations, provisioning, or backups. If a PreSync hook fails, the sync fails and the new version isn't rolled out.
metadata:
  annotations:
    argocd.argoproj.io/hook: PreSync
Real-world example A backup Job runs as a PreSync hook so there's a restore point before the deployment proceeds.

Common follow-ups: What happens if PreSync fails? | Why run migrations in PreSync?

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All 29 Sync Waves & Hooks questions