apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: cnpg
  namespace: cnpg-system
spec:
  egress:
    - ports:
        - port: 53
          protocol: UDP
        - port: 53
          protocol: TCP
      to:
        - namespaceSelector:
            matchLabels:
              kubernetes.io/metadata.name: kube-system
          podSelector:
            matchLabels:
              k8s-app: kube-dns
    - ports:
        - port: 6443
          protocol: TCP
    - ports:
        - port: 8000
          protocol: TCP
      to:
        - namespaceSelector: {}
          podSelector:
            matchExpressions:
              - key: cnpg.io/cluster
                operator: Exists
  ingress:
    - ports:
        - port: 9443
          protocol: TCP
  podSelector:
    matchLabels:
      app.kubernetes.io/name: cloudnative-pg
  policyTypes:
    - Ingress
    - Egress