---
# CNPG cluster pods: intra-namespace, host metrics, DNS.
apiVersion: cilium.io/v2
kind: CiliumNetworkPolicy
metadata:
  name: postgres-cluster
  namespace: postgres
spec:
  endpointSelector:
    matchLabels:
      cnpg.io/cluster: main
  ingress:
    # Allow intra-namespace replication and metrics.
    - fromEndpoints:
        - matchLabels:
            k8s:io.kubernetes.pod.namespace: postgres
      toPorts:
        - ports:
            - port: "5432"
              protocol: TCP
            - port: "8000"
              protocol: TCP
    # Vault database engine: rotates static role credentials
    - fromEndpoints:
        - matchLabels:
            k8s:io.kubernetes.pod.namespace: vault
            app.kubernetes.io/name: vault
            component: server
      toPorts:
        - ports:
            - port: "5432"
              protocol: TCP
    # Zitadel app and init job
    - fromEndpoints:
        - matchLabels:
            k8s:io.kubernetes.pod.namespace: zitadel
            app.kubernetes.io/name: zitadel
      toPorts:
        - ports:
            - port: "5432"
              protocol: TCP
    # Forgejo app and init containers
    - fromEndpoints:
        - matchLabels:
            k8s:io.kubernetes.pod.namespace: forgejo
            app.kubernetes.io/name: forgejo
      toPorts:
        - ports:
            - port: "5432"
              protocol: TCP
    - fromEndpoints:
        - matchExpressions:
            - key: k8s:io.kubernetes.pod.namespace
              operator: In
              values:
                - forgejo-public
            - key: app.kubernetes.io/name
              operator: In
              values:
                - forgejo
            - key: app.kubernetes.io/instance
              operator: In
              values:
                - forge-code
                - forge-git
      toPorts:
        - ports:
            - port: "5432"
              protocol: TCP
    # Grafana app
    - fromEndpoints:
        - matchLabels:
            k8s:io.kubernetes.pod.namespace: grafana
            app.kubernetes.io/name: grafana
      toPorts:
        - ports:
            - port: "5432"
              protocol: TCP
    # Quay registry, mirror, and Clair
    - fromEndpoints:
        - matchLabels:
            k8s:io.kubernetes.pod.namespace: quay
      toPorts:
        - ports:
            - port: "5432"
              protocol: TCP
    # Argo Workflows controller/server archive and node-status offload
    - fromEndpoints:
        - matchLabels:
            k8s:io.kubernetes.pod.namespace: argo
            app.kubernetes.io/name: argo-workflows-workflow-controller
      toPorts:
        - ports:
            - port: "5432"
              protocol: TCP
    - fromEndpoints:
        - matchLabels:
            k8s:io.kubernetes.pod.namespace: argo
            app.kubernetes.io/name: argo-workflows-server
      toPorts:
        - ports:
            - port: "5432"
              protocol: TCP
    - fromEndpoints:
        - matchExpressions:
            - key: k8s:io.kubernetes.pod.namespace
              operator: In
              values:
                - stalwart
            - key: app.kubernetes.io/name
              operator: In
              values:
                - stalwart
                - stalwart-bootstrap
                - stalwart-controller
            - key: app.kubernetes.io/instance
              operator: In
              values:
                - stalwart
      toPorts:
        - ports:
            - port: "5432"
              protocol: TCP
    # Allow host for metrics.
    - fromEntities:
        - host
      toPorts:
        - ports:
            - port: "8000"
              protocol: TCP
  egress:
    # Allow intra-namespace replication and metrics.
    - toEndpoints:
        - matchLabels:
            k8s:io.kubernetes.pod.namespace: postgres
      toPorts:
        - ports:
            - port: "5432"
              protocol: TCP
            - port: "8000"
              protocol: TCP
    # Allow kube-apiserver access.
    - toEntities:
        - kube-apiserver
      toPorts:
        - ports:
            - port: "6443"
              protocol: TCP
    # Allow DNS access.
    - toEndpoints:
        - matchLabels:
            k8s:io.kubernetes.pod.namespace: kube-system
            k8s-app: kube-dns
      toPorts:
        - ports:
            - port: "53"
              protocol: UDP
            - port: "53"
              protocol: TCP
    - toEndpoints:
        - matchLabels:
            k8s:io.kubernetes.pod.namespace: versitygw
            app.kubernetes.io/name: versitygw
            app.kubernetes.io/instance: versitygw
      toPorts:
        - ports:
            - port: "7070"
              protocol: TCP
    - toCIDR:
        - 10.66.127.81/32
      toPorts:
        - ports:
            - port: "443"
              protocol: TCP
---
# Host egress to postgres pods (metrics, webhook).
apiVersion: cilium.io/v2
kind: CiliumClusterwideNetworkPolicy
metadata:
  name: host-egress-postgres
spec:
  nodeSelector: {}
  egress:
    - toEndpoints:
        - matchLabels:
            k8s:io.kubernetes.pod.namespace: postgres
      toPorts:
        - ports:
            - port: "8000"
              protocol: TCP
            - port: "9443"
              protocol: TCP
            - port: "8081"
              protocol: TCP
---
# CNPG operator: webhook (9443), host metrics (8000), apiserver.
apiVersion: cilium.io/v2
kind: CiliumNetworkPolicy
metadata:
  name: cnpg-operator
  namespace: postgres
spec:
  endpointSelector:
    matchLabels:
      app.kubernetes.io/name: cloudnative-pg
  ingress:
    # Allow webhook access from kube-apiserver (may arrive as remote-node when apiserver is on a different node).
    - fromEntities:
        - kube-apiserver
        - host
        - remote-node
      toPorts:
        - ports:
            - port: "9443"
              protocol: TCP
    # Allow host for metrics.
    - fromEntities:
        - host
      toPorts:
        - ports:
            - port: "8000"
              protocol: TCP
  egress:
    # Allow metrics scraping from cluster pods.
    - toEndpoints:
        - matchLabels:
            cnpg.io/cluster: main
      toPorts:
        - ports:
            - port: "8000"
              protocol: TCP
    # Allow kube-apiserver access.
    - toEntities:
        - kube-apiserver
      toPorts:
        - ports:
            - port: "6443"
              protocol: TCP
    # Allow DNS access.
    - toEndpoints:
        - matchLabels:
            k8s:io.kubernetes.pod.namespace: kube-system
            k8s-app: kube-dns
      toPorts:
        - ports:
            - port: "53"
              protocol: UDP
            - port: "53"
              protocol: TCP
    - toEndpoints:
        - matchLabels:
            k8s:io.kubernetes.pod.namespace: postgres
            app.kubernetes.io/name: plugin-barman-cloud
      toPorts:
        - ports:
            - port: "9090"
              protocol: TCP
---
apiVersion: cilium.io/v2
kind: CiliumNetworkPolicy
metadata:
  name: barman
  namespace: postgres
spec:
  endpointSelector:
    matchLabels:
      app.kubernetes.io/name: plugin-barman-cloud
  ingress:
    - fromEndpoints:
        - matchLabels:
            k8s:io.kubernetes.pod.namespace: postgres
            app.kubernetes.io/name: cloudnative-pg
      toPorts:
        - ports:
            - port: "9090"
              protocol: TCP
    - fromEntities:
        - host
      toPorts:
        - ports:
            - port: "8081"
              protocol: TCP
  egress:
    - toEntities:
        - kube-apiserver
      toPorts:
        - ports:
            - port: "6443"
              protocol: TCP
    - toEndpoints:
        - matchLabels:
            k8s:io.kubernetes.pod.namespace: kube-system
            k8s-app: kube-dns
      toPorts:
        - ports:
            - port: "53"
              protocol: UDP
            - port: "53"
              protocol: TCP