It would be great if a new application could be deployed over multiple (selection) of clusters in a way that for example generic rbac rules and networkpolicies could be deployed over multiple clusters with one (generic) kustomization or Helm chart
Not sure if I understood proposal right. You might create multiple applications using the same chart/kustomize app and point each application to different cluster/namespace.
Does it address use-case which you are trying to solve?
What I meant was that one application could point to multiple clusters. Now only one cluster is possible. The use case here is that when you are doing ops for multiple clusters with the same rbac rules or policies it is possible to sync over those clusters with one application. Anyway for now mulitple applications are fine.
I'd actually really love this feature coming from spinnaker. I often deploy the same app across multiple clusters.
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I'd actually really love this feature coming from spinnaker. I often deploy the same app across multiple clusters.