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Skillsargocd-advanced

argocd-advanced

Deployment & operations

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Updated 10-15 23:42

About this skill

ArgoCD Advanced

Routing entrypoint for advanced/automation-oriented ArgoCD operations. Each sub-area has its own deep reference, preserved verbatim from the pre-consolidation skills, under References/.

Scope routing

If you need to… Read
Implement multi-cluster app propagation with ApplicationSet generators (list / cluster / git / matrix / merge / SCM / pull-request / plugin) References/applicationset.md plus References/applicationset/ for deep-dive reference docs
Automate container image updates for ArgoCD-managed workloads (update strategies, ImageUpdater CRD, git write-back) References/image-updater.md + References/image-updater/ + References/ArgocdImageUpdater/ + Samples/image-updater/
Bootstrap a new Kubernetes cluster into the multi-repo GitOps environment References/cluster-bootstrapping.md + References/cluster-bootstrapping/ + References/ArgocdClusterBootstrapping/
Onboard a new workload via the standardized ApplicationSet template References/application-install.md + Workflows/application-install/ + Tools/application-install/

Decision tree

Need new cluster registered with ArgoCD?           -> cluster-bootstrapping
Need new service deployed to existing clusters?    -> application-install
Need to fan one app definition across N clusters?  -> applicationset
Need images to roll forward automatically?         -> image-updater

Gotchas

  • ApplicationSet generators are ordered. With matrix/merge generators, the parent generator's result is the input to the child — get the order wrong and you get an empty parameter set with no error.
  • Image Updater + git write-back requires a write credential. A read-only repo cred will silently leave images stuck on the original version. Check Image Updater pod logs for permission denied on push.
  • Bootstrap cluster secrets must carry the labels your ApplicationSet generators select on. A cluster registered without the expected label key/value is invisible to existing ApplicationSets — and there is no error, just zero apps.
  • application-install ships a your organization/ExampleApp-specific template. The Workflows assume the multi-repo layout. If you're not in that environment, treat it as a reference pattern, not a runnable recipe.
  • CRD versions matter. ApplicationSet ships with ArgoCD 2.3+; certain generators (SCM, pull request) need 2.5+. Read References/applicationset.md Version Compatibility before adopting.