Service exposition with ListenerClasses

The operator deploys a Listener for the Node pod. The listener defaults to only being accessible from within the Kubernetes cluster, but this can be changed by setting .spec.nodes.roleConfig.listenerClass:

spec:
  nodes:
    roleConfig:
      listenerClass: external-unstable  (1)
1 Specify one of external-stable, external-unstable, cluster-internal or a custom ListenerClass (the default setting is cluster-internal).