Usage with ArgoCD

In order for AppCat to work properly in conjecture with ArgoCD there are two requirements that need to be fullfilled:

ArgoCD has to be at least v2.4.8
The ResourceTrackingMethod needs to be set to annotation

As of 3.x ArgoCD will use ResourceTrackingMethod=annotation by default. A fresh installation of ArgoCD will not require any additional configuration or workaround. If upgrading ArgoCD from 2.x please check the official notes.

Workaround

If the requirements can’t be satisfied, following workaround will help. On any instance that should be managed by ArgoCD it will need following annotations:

annotations:
  argocd.argoproj.io/compare-options: IgnoreExtraneous
  argocd.argoproj.io/sync-options: Prune=false

With these annotations ArgoCD won’t clean up left over objects. So it might be possible that manual deletion is required if the instance is removed from ArgoCD.