# WordPress faces the internet, so if it is ever taken over it should only
# reach its own database, DNS and the internet: not the LAN (NAS, router),
# the Kubernetes API or other namespaces. Ingress comes from Envoy, the
# mariadb-operator and the node itself (kubelet probes; 10.1.7.64 is the
# node's Calico VXLAN address, projectcalico.org/IPv4VXLANTunnelAddr).
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: default
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
    # The internet, which includes this site's own public address
    # (wp-cron's loopback requests go out and come back through Envoy).
    - to:
        - ipBlock:
            cidr: 0.0.0.0/0
            except:
              - 10.0.0.0/8
              - 100.64.0.0/10
              - 169.254.0.0/16
              - 172.16.0.0/12
              - 192.168.0.0/16
---
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: wordpress-from-envoy
spec:
  podSelector:
    matchLabels:
      app.kubernetes.io/name: wordpress
  policyTypes:
    - Ingress
  ingress:
    - from:
        - namespaceSelector:
            matchLabels:
              kubernetes.io/metadata.name: envoy-gateway-system
          podSelector:
            matchLabels:
              app.kubernetes.io/name: envoy
      ports:
        - port: 8000
---
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: mariadb-from-operator
spec:
  podSelector:
    matchLabels:
      app.kubernetes.io/name: mariadb
  policyTypes:
    - Ingress
  ingress:
    - from:
        - namespaceSelector:
            matchLabels:
              kubernetes.io/metadata.name: mariadb-system
      ports:
        - port: 3306