Service exposition with ListenerClasses

Apache Superset offers a web UI and an API. The operator deploys a Listener for the Nodes 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-stable (1)

1	Specify one of `external-stable`, `external-unstable`, `cluster-internal` at role-level (the default setting is `cluster-internal`).