All 28 App of Apps questions
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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? How do you observe the health of all child apps at once? How do you combine App of Apps with ApplicationSets? How do you manage environment promotion using App of Apps? How do you prevent accidental deletion of all child apps? When should you migrate from App of Apps to ApplicationSets? How do you use sync waves on child applications for ordered platform bootstrap? How do you handle per-environment differences in an App of Apps model?
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What are the risks of App of Apps and how do you mitigate them?

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Risks: a broad blast radius (a bad parent change affects many apps), accidental pruning cascading deletes, and manually maintaining child manifests. Mitigate with careful prune settings and finalizers, PR review on the parent repo, splitting into scoped roots per domain, and using Projects to constrain what children can deploy.
Real-world example The team splits one giant root into per-domain roots and disables prune on critical children to limit blast radius.

Common follow-ups: Why is blast radius a concern? | How do Projects reduce risk?

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All 28 App of Apps questions