argo-cd/docs/user-guide/compare-options.md

Compare Options

Ignoring Resources That Are Extraneous

You may wish to exclude resources from the app's overall sync status under certain circumstances, e.g. if they are generated by a tool. This can be done by adding this annotation on the resource you wish to exclude:

metadata:
  annotations:
    argocd.argoproj.io/compare-options: IgnoreExtraneous

Note

This only affects the sync status. If the resource's health is degraded, then the app will also be degraded.

Kustomize has a feature that allows you to generate config maps (read more ⧉). You can set generatorOptions to add this annotation so that your app remains in sync:

configMapGenerator:
  - name: my-map
    literals:
      - foo=bar
generatorOptions:
  annotations:
    argocd.argoproj.io/compare-options: IgnoreExtraneous
kind: Kustomization

Note

generatorOptions adds annotations to both config maps and secrets (read more ⧉).

You may wish to combine this with the Prune=false sync option.