---
apiVersion: cilium.io/v2
kind: CiliumNetworkPolicy
metadata:
  name: vault-server
  namespace: vault
spec:
  endpointSelector:
    matchLabels:
      app.kubernetes.io/name: vault
      component: server
  ingress:
    # Raft peer-to-peer (intra-namespace only)
    - fromEndpoints:
        - matchLabels:
            k8s:io.kubernetes.pod.namespace: vault
            app.kubernetes.io/name: vault
            component: server
      toPorts:
        - ports:
            - port: "8200"
              protocol: TCP
            - port: "8201"
              protocol: TCP
    # port-forward from host (bootstrap: init, unseal, Terraform)
    - fromEntities:
        - host
      toPorts:
        - ports:
            - port: "8200"
              protocol: TCP
    # cert-manager: Vault PKI signing via pki_int
    - fromEndpoints:
        - matchLabels:
            k8s:io.kubernetes.pod.namespace: cert-manager
            app.kubernetes.io/name: cert-manager
            app.kubernetes.io/component: controller
      toPorts:
        - ports:
            - port: "8200"
              protocol: TCP
    # VSO controller: reads secrets from Vault API
    - fromEndpoints:
        - matchLabels:
            k8s:io.kubernetes.pod.namespace: vault
            app.kubernetes.io/name: vault-secrets-operator
      toPorts:
        - ports:
            - port: "8200"
              protocol: TCP
    - fromEndpoints:
        - matchLabels:
            k8s:io.kubernetes.pod.namespace: argo-opnsense-certificate
            app.kubernetes.io/name: opnsense-certificate-rotator
            app.kubernetes.io/instance: opnsense-certificate-rotator
      toPorts:
        - ports:
            - port: "8200"
              protocol: TCP
    - fromEndpoints:
        - matchLabels:
            k8s:io.kubernetes.pod.namespace: stalwart
            app.kubernetes.io/name: stalwart-controller
            app.kubernetes.io/instance: stalwart
      toPorts:
        - ports:
            - port: "8200"
              protocol: TCP
    - fromCIDR:
        - 10.115.187.218/24
        - 10.63.81.107/24
        - 10.162.8.60/24
      toPorts:
        - ports:
            - port: "8200"
              protocol: TCP
  egress:
    # Raft peer-to-peer
    - toEndpoints:
        - matchLabels:
            k8s:io.kubernetes.pod.namespace: vault
            app.kubernetes.io/name: vault
            component: server
      toPorts:
        - ports:
            - port: "8200"
              protocol: TCP
            - port: "8201"
              protocol: TCP
    # Database engine: rotates PostgreSQL static role credentials
    - toEndpoints:
        - matchLabels:
            k8s:io.kubernetes.pod.namespace: postgres
            cnpg.io/cluster: main
      toPorts:
        - ports:
            - port: "5432"
              protocol: TCP
    # Kubernetes service registration + TokenReview (k8s auth method)
    - 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
---
# vault-secrets-operator: TLS API on 8200, health probes on 8081 from kubelet.
apiVersion: cilium.io/v2
kind: CiliumNetworkPolicy
metadata:
  name: vault-secrets-operator
  namespace: vault
spec:
  endpointSelector:
    matchLabels:
      app.kubernetes.io/name: vault-secrets-operator
      control-plane: controller-manager
  ingress:
    # Kubelet health/readiness probes + kube-apiserver webhook calls
    - fromEntities:
        - host
      toPorts:
        - ports:
            - port: "8081"
              protocol: TCP
            - port: "9443"
              protocol: TCP
  egress:
    # Vault API
    - toEndpoints:
        - matchLabels:
            k8s:io.kubernetes.pod.namespace: vault
            app.kubernetes.io/name: vault
            component: server
      toPorts:
        - ports:
            - port: "8200"
              protocol: TCP
    # Kubernetes API (watch/patch secrets, TokenReview)
    - 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
---
# Host egress to vault pods (kubectl port-forward during bootstrap) and VSO health probes.
apiVersion: cilium.io/v2
kind: CiliumClusterwideNetworkPolicy
metadata:
  name: host-egress-vault
spec:
  nodeSelector: {}
  egress:
    - toEndpoints:
        - matchLabels:
            k8s:io.kubernetes.pod.namespace: vault
            app.kubernetes.io/name: vault
            component: server
      toPorts:
        - ports:
            - port: "8200"
              protocol: TCP
    # Kubelet → VSO health probes; kube-apiserver → VSO webhook
    - toEndpoints:
        - matchLabels:
            k8s:io.kubernetes.pod.namespace: vault
            app.kubernetes.io/name: vault-secrets-operator
            control-plane: controller-manager
      toPorts:
        - ports:
            - port: "8081"
              protocol: TCP
            - port: "9443"
              protocol: TCP
---
# Same-node Gateway/LB and host bootstrap paths can return to node-local
# ephemeral source ports via the host path.
apiVersion: cilium.io/v2
kind: CiliumClusterwideNetworkPolicy
metadata:
  name: host-ingress-vault-replies
spec:
  nodeSelector: {}
  ingress:
    - fromEndpoints:
        - matchLabels:
            k8s:io.kubernetes.pod.namespace: vault
            app.kubernetes.io/name: vault
            component: server
      toPorts:
        - ports:
            - port: "32768"
              endPort: 60999
              protocol: TCP