k8scd/mariadb-operator/networkpolicy.yaml

# The mariadb-operator's three pods reach each other, DNS and the API
# server (the node, port 16443); the operator also connects to MariaDB on
# 3306 for the databases, users and grants it manages (mbgwp's
# mariadb-from-operator lets it in). Besides their own namespace they take
# connections only from the node: the API server calls the webhook from
# there and the kubelet probes come from there too (10.1.7.64 is the node's
# Calico VXLAN address, projectcalico.org/IPv4VXLANTunnelAddr). This
# folder's Application deploys into argocd (the operator's own
# Applications), hence the namespace here.
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: default
  namespace: mariadb-system
spec:
  podSelector: {}
  policyTypes:
    - Ingress
    - Egress
  ingress:
    - from:
        - podSelector: {}
    - from:
        - ipBlock:
            cidr: 192.168.1.204/32
        - ipBlock:
            cidr: 10.1.7.64/32
  egress:
    - to:
        - podSelector: {}
    - to:
        - namespaceSelector:
            matchLabels:
              kubernetes.io/metadata.name: kube-system
          podSelector:
            matchLabels:
              k8s-app: kube-dns
      ports:
        - protocol: UDP
          port: 53
        - protocol: TCP
          port: 53
    - to:
        - ipBlock:
            cidr: 192.168.1.204/32
      ports:
        - port: 16443
    - to:
        - namespaceSelector: {}
          podSelector:
            matchLabels:
              app.kubernetes.io/name: mariadb
      ports:
        - port: 3306