In the MultiClusterService object we use the label selectors to match CAPI clusters, e.g:

apiVersion: hmc.mirantis.com/v1alpha1
kind: MultiClusterService
metadata:
  name: myappz-global
spec:
  servicesPriority: 1000
  clusterSelector:
    matchLabels:
      env: dev3
  services:
    - template: ingress-nginx-4-11-3
      name: ingress-nginx
      namespace: ingress-nginx

Currently to match the clusters we want to this MultiClusterService, we need to manually add env: dev3 label to the Cluster objects.

We should make it so that the labels on Cluster object can be assigned via the ManagedCluster object.