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What is the resource hooks vs health relationship during a sync? What happens during a sync when a resource apply fails? How does ArgoCD assess Deployment health specifically? What is the Suspended health status? 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 prevent auto-sync from applying an unwanted change during an incident? How do you monitor ArgoCD itself (metrics and observability)?
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ArgoCD › Sync & Health

How do you skip health assessment or diff for specific fields?

Intermediate

Answer

Use ignoreDifferences to exclude controller-managed fields from diffs (preventing false OutOfSync), and custom health scripts to define health for CRDs. For fields set by admission/webhooks, ignoring them or using ServerSideApply avoids perpetual drift and health noise.
spec:
  ignoreDifferences:
    - group: apps
      kind: Deployment
      jsonPointers: [ /spec/replicas ]
Real-world example Ignoring HPA-managed replicas stops the app flapping between Synced and OutOfSync every reconcile.

Common follow-ups: Which fields commonly need ignoring? | How does SSA reduce noise?

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