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How does ServerSideApply help with large or conflicting resources? How do you handle CRDs and their custom resources syncing in the right order? How can you customize health checks for third-party or custom resources? How do you implement progressive delivery (canary/blue-green) with ArgoCD? How do you monitor ArgoCD itself (metrics and observability)? How do you debug why an app never reaches Healthy after a successful sync? How do sync windows control when syncs are allowed? How do you integrate Argo Rollouts analysis into sync health?
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How do you prevent auto-sync from applying an unwanted change during an incident?

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Answer

You can disable automated sync temporarily (remove/patch syncPolicy.automated), use sync windows to block syncs during a change freeze, set the app to manual, or add maintenance annotations. Sync windows (defined on the Project) allow/deny syncs on a schedule so automated reconciliation pauses during sensitive periods.
kind: AppProject
spec:
  syncWindows:
    - kind: deny
      schedule: '0 22 * * *'
      duration: 8h
      applications: ['*']
Real-world example A nightly deny sync window freezes deployments during the change-freeze period so no auto-sync fires.

Common follow-ups: What is a sync window? | How do you pause auto-sync safely?

Applications RBAC Sync & Health
All 29 Sync & Health questions