Does a kustomization reconcile when one of its dependencies is suspended?

[tobias-jenkner]

Hi, we are using dependencies between Flux Kustomizations and I wonder if a Kustomization will be reconciled if one of its dependencies is suspended.

[matheuscscp]

It depends on the state the dependency was left in. The dependency check logic does not check anything related to suspension:

https://github.com/fluxcd/kustomize-controller/blob/44607b6b18f4ad0fa279baaab0bb5a9022145e9d/internal/controller/kustomization_controller.go#L550-L629

You can use .readyExpr to customize dependency check behavior: https://fluxcd.io/flux/components/kustomize/kustomizations/#dependency-ready-expression

[tobias-jenkner]

Thanks for the explanation.

I always saw suspending of Kustomizations as a way to do manual maintenance work in an emergency situation. Does that mean that out of the box without custom readExpr the following can happen:

1. Starting point: manual maintenance is needed but all Kustomizations are yet Ready
2. I suspend the Kustomizations
3. I do the manual maintenance but somehow during that I break the Kustomization A that acts as a dependency for another Kustomization B
4. I resume all Kustomizations
5. Kustomization B might be reconciled, although Kustomization A is actually broken ?