---
apiVersion: cilium.io/v2
kind: CiliumNetworkPolicy
metadata:
  name: zitadel
  namespace: zitadel
spec:
  endpointSelector:
    matchExpressions:
      - key: app.kubernetes.io/name
        operator: In
        values:
          - zitadel
          - zitadel-login
  ingress:
    # zitadel-login pod needs ingress to zitadel pods for the init wait and API communication
    - fromEndpoints:
        - matchLabels:
            app.kubernetes.io/name: zitadel-login
      toPorts:
        - ports:
            - port: "8080"
              protocol: TCP
    # Some Gateway/LB backend flows are sourced from the node host path.
    - fromEntities:
        - host
      toPorts:
        - ports:
            - port: "8080"
              protocol: TCP
            - port: "3000"
              protocol: TCP
    - fromEntities:
        - ingress
      toPorts:
        - ports:
            - port: "8080"
              protocol: TCP
            - port: "3000"
              protocol: TCP
    - fromEndpoints:
        - matchLabels:
            k8s:io.kubernetes.pod.namespace: kube-system
            gateway.networking.k8s.io/gateway-name: gateway-relay
      toPorts:
        - ports:
            - port: "8080"
              protocol: TCP
            - port: "3000"
              protocol: TCP
    - fromEndpoints:
        - matchLabels:
            k8s:io.kubernetes.pod.namespace: zitadel
            app.kubernetes.io/name: zitadel-oidc-internal
            app.kubernetes.io/instance: zitadel
      toPorts:
        - ports:
            - port: "8080"
              protocol: TCP
  egress:
    - toEndpoints:
        - matchLabels:
            k8s:io.kubernetes.pod.namespace: postgres
            cnpg.io/cluster: main
      toPorts:
        - ports:
            - port: "5432"
              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
    # zitadel-login needs to talk to the zitadel API
    - toEndpoints:
        - matchLabels:
            app.kubernetes.io/name: zitadel
      toPorts:
        - ports:
            - port: "8080"
              protocol: TCP
---
apiVersion: cilium.io/v2
kind: CiliumNetworkPolicy
metadata:
  name: zitadel-stalwart-submission
  namespace: zitadel
spec:
  endpointSelector:
    matchLabels:
      app.kubernetes.io/name: zitadel
      app.kubernetes.io/instance: zitadel
  egress:
    - toEndpoints:
        - matchLabels:
            k8s:io.kubernetes.pod.namespace: stalwart
            app.kubernetes.io/name: stalwart
            app.kubernetes.io/instance: stalwart
      toPorts:
        - ports:
            - port: "587"
              protocol: TCP
---
apiVersion: cilium.io/v2
kind: CiliumNetworkPolicy
metadata:
  name: zitadel-oidc-internal
  namespace: zitadel
spec:
  endpointSelector:
    matchLabels:
      app.kubernetes.io/name: zitadel-oidc-internal
      app.kubernetes.io/instance: zitadel
  ingress:
    - fromEntities:
        - host
      toPorts:
        - ports:
            - port: "8080"
              protocol: TCP
    - fromEndpoints:
        - matchLabels:
            k8s:io.kubernetes.pod.namespace: longhorn
            app.kubernetes.io/name: oauth2-proxy
            app.kubernetes.io/instance: longhorn
      toPorts:
        - ports:
            - port: "8080"
              protocol: TCP
            - port: "8443"
              protocol: TCP
    - fromEndpoints:
        - matchLabels:
            k8s:io.kubernetes.pod.namespace: frigate
            app.kubernetes.io/name: oauth2-proxy
            app.kubernetes.io/instance: frigate
      toPorts:
        - ports:
            - port: "8080"
              protocol: TCP
            - port: "8443"
              protocol: TCP
    - fromEndpoints:
        - matchLabels:
            k8s:io.kubernetes.pod.namespace: stalwart
            app.kubernetes.io/instance: stalwart
        - matchLabels:
            k8s:io.kubernetes.pod.namespace: quay
            app.kubernetes.io/name: quay
            app.kubernetes.io/instance: quay-registry
        - matchLabels:
            k8s:io.kubernetes.pod.namespace: forgejo
            app.kubernetes.io/name: forgejo
            app.kubernetes.io/instance: forgejo
        - matchLabels:
            k8s:io.kubernetes.pod.namespace: forgejo-public
            app.kubernetes.io/name: forgejo
            app.kubernetes.io/instance: forge-git
        - matchLabels:
            k8s:io.kubernetes.pod.namespace: grafana
            app.kubernetes.io/name: grafana
            app.kubernetes.io/instance: grafana
      toPorts:
        - ports:
            - port: "8443"
              protocol: TCP
  egress:
    - toEndpoints:
        - matchLabels:
            k8s:io.kubernetes.pod.namespace: zitadel
            app.kubernetes.io/name: zitadel
      toPorts:
        - ports:
            - port: "8080"
              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
---
apiVersion: cilium.io/v2
kind: CiliumClusterwideNetworkPolicy
metadata:
  name: oidc-relay-client
spec:
  endpointSelector:
    matchLabels:
      quorate.dev/zitadel-relay: "true"
  egress:
    - toEndpoints:
        - matchLabels:
            k8s:io.kubernetes.pod.namespace: zitadel
            app.kubernetes.io/name: zitadel-oidc-internal
            app.kubernetes.io/instance: zitadel
      toPorts:
        - ports:
            - port: "8443"
              protocol: TCP
---
apiVersion: cilium.io/v2
kind: CiliumClusterwideNetworkPolicy
metadata:
  name: host-egress-zitadel-oidc-internal
spec:
  nodeSelector: {}
  egress:
    - toEndpoints:
        - matchLabels:
            k8s:io.kubernetes.pod.namespace: zitadel
            app.kubernetes.io/name: zitadel-oidc-internal
      toPorts:
        - ports:
            - port: "8080"
              protocol: TCP
---
apiVersion: cilium.io/v2
kind: CiliumClusterwideNetworkPolicy
metadata:
  name: gateway-relay-egress-zitadel
spec:
  endpointSelector:
    matchLabels:
      "reserved:ingress": ""
  egress:
    - toEndpoints:
        - matchLabels:
            k8s:io.kubernetes.pod.namespace: zitadel
            app.kubernetes.io/name: zitadel
      toPorts:
        - ports:
            - port: "8080"
              protocol: TCP
    - toEndpoints:
        - matchLabels:
            k8s:io.kubernetes.pod.namespace: zitadel
            app.kubernetes.io/name: zitadel-login
      toPorts:
        - ports:
            - port: "3000"
              protocol: TCP
---
apiVersion: cilium.io/v2
kind: CiliumClusterwideNetworkPolicy
metadata:
  name: host-egress-zitadel
spec:
  nodeSelector: {}
  egress:
    - toEndpoints:
        - matchExpressions:
            - key: k8s:io.kubernetes.pod.namespace
              operator: In
              values: ["zitadel"]
            - key: app.kubernetes.io/name
              operator: In
              values: ["zitadel", "zitadel-login"]
      toPorts:
        - ports:
            - port: "8080"
              protocol: TCP
            - port: "3000"
              protocol: TCP
---
apiVersion: cilium.io/v2
kind: CiliumClusterwideNetworkPolicy
metadata:
  name: gateway-client-to-zitadel
spec:
  endpointSelector:
    matchLabels:
      gateway.quorate.internal/allow-gateway-client: "true"
  egress:
    - toEndpoints:
        - matchLabels:
            k8s:io.kubernetes.pod.namespace: zitadel
            app.kubernetes.io/name: zitadel
      toPorts:
        - ports:
            - port: "8080"
              protocol: TCP
    - toEndpoints:
        - matchLabels:
            k8s:io.kubernetes.pod.namespace: zitadel
            app.kubernetes.io/name: zitadel-login
      toPorts:
        - ports:
            - port: "3000"
              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
---
apiVersion: cilium.io/v2
kind: CiliumClusterwideNetworkPolicy
metadata:
  name: zitadel-ingress-gateway-clients
spec:
  endpointSelector:
    matchExpressions:
      - key: k8s:io.kubernetes.pod.namespace
        operator: In
        values: ["zitadel"]
      - key: app.kubernetes.io/name
        operator: In
        values: ["zitadel", "zitadel-login"]
  ingress:
    - fromEndpoints:
        - matchLabels:
            gateway.quorate.internal/allow-gateway-client: "true"
      toPorts:
        - ports:
            - port: "8080"
              protocol: TCP
            - port: "3000"
              protocol: TCP
---
# Same-node Gateway/LB backend selections can return to node-local ephemeral
# source ports via the host path. Keep this with Zitadel even though the policy
# kind is clusterwide, because the exception exists only for this app path.
apiVersion: cilium.io/v2
kind: CiliumClusterwideNetworkPolicy
metadata:
  name: host-ingress-zitadel-replies
spec:
  nodeSelector: {}
  ingress:
    - fromEndpoints:
        - matchExpressions:
            - key: k8s:io.kubernetes.pod.namespace
              operator: In
              values: ["zitadel"]
            - key: app.kubernetes.io/name
              operator: In
              values: ["zitadel", "zitadel-login"]
      toPorts:
        - ports:
            - port: "32768"
              endPort: 60999
              protocol: TCP