reference clusterclass in specific namespace

[MagnusRef]

What would you like to be added (User Story)?

As a operator i would like to separate my cluster resources from my clusterclass. As it is right now you can only specify the name of the cluster class in spec.topology.class, but not what namespace it is in.

I think it is good to separate clusters and the clusterclasses and its associated resources for security and a more cleaner look.

Detailed Description

Add in the possibility to reference class not only by name but also namespace.
eg.

apiVersion: cluster.x-k8s.io/v1beta1
kind: Cluster
metadata:
  name: test-1
  namespace: test-clusters
spec:
  ...
  topology:
    className: capi-cc
    classNamespace: capi-classes
    version: v1.25.8
    ...

Anything else you would like to add?

No response

Label(s) to be applied

/kind feature
/area clusterclass

[k8s-ci-robot]

This issue is currently awaiting triage.

If CAPI contributors determines this is a relevant issue, they will accept it by applying the triage/accepted label and provide further guidance.

The triage/accepted label can be added by org members by writing /triage accepted in a comment.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[killianmuldoon]

Currently it's only possible to create a Cluster in the same namespace as a ClusterClass - we have an issue open at #5673 to allow using a clusterclass in one namespace to stamp a cluster in a different namespace.

If that issue matches what you're looking for do you mind closing this one and chiming in there?

[MagnusRef]

Sorry for duplicate. closing now.