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Does deleting a child app manifest from Git remove the child? How does App of Apps differ from ApplicationSets? How do you order child application deployment in App of Apps? How do you bootstrap a whole cluster with App of Apps? How do child applications reference different repos or paths? How do you add a new application in an App of Apps setup? How do you structure directories for an App of Apps repo? How do you manage secrets for child apps in App of Apps? Can the parent app itself be managed by GitOps? How do you give teams ownership of their own child apps safely?
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How does cascading deletion work with App of Apps?

Intermediate

Answer

Deleting the parent Application can delete its children (and their resources) if finalizers/prune are set for cascading deletion. The resources-finalizer on an Application causes ArgoCD to delete the app's managed resources when the app is removed. Understanding this prevents accidental teardown of whole environments.
metadata:
  finalizers:
    - resources-finalizer.argocd.argoproj.io
Real-world example Removing the root app with the resources finalizer tears down every child app and its workloads—useful for env teardown, dangerous by accident.

Common follow-ups: What does the resources-finalizer do? | How do you prevent accidental cascade deletes?

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All 28 App of Apps questions