---
# cert-manager controller: metrics from host (9403), apiserver.
apiVersion: cilium.io/v2
kind: CiliumNetworkPolicy
metadata:
  name: cert-manager
  namespace: cert-manager
spec:
  endpointSelector:
    matchLabels:
      app.kubernetes.io/component: controller
  ingress:
    - fromEntities:
        - host
      toPorts:
        - ports:
            - port: "9403"
              protocol: TCP
  egress:
    - toEntities:
        - kube-apiserver
      toPorts:
        - ports:
            - port: "6443"
              protocol: TCP
    - toEntities:
        - world
      toPorts:
        - ports:
            - port: "80"
              protocol: TCP
            - port: "443"
              protocol: TCP
            - port: "53"
              protocol: UDP
            - port: "53"
              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
    - toEndpoints:
        - matchLabels:
            k8s:io.kubernetes.pod.namespace: vault
            app.kubernetes.io/name: vault
            component: server
      toPorts:
        - ports:
            - port: "8200"
              protocol: TCP
---
# cert-manager webhook: called by kube-apiserver on 6080, also needs apiserver.
apiVersion: cilium.io/v2
kind: CiliumNetworkPolicy
metadata:
  name: cert-manager-webhook
  namespace: cert-manager
spec:
  endpointSelector:
    matchLabels:
      app.kubernetes.io/component: webhook
  ingress:
    - fromEntities:
        - kube-apiserver
        - host
        - remote-node
      toPorts:
        - ports:
            - port: "6080"
              protocol: TCP
            - port: "10250"
              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
---
# Host egress to cert-manager pods (webhook, metrics).
apiVersion: cilium.io/v2
kind: CiliumClusterwideNetworkPolicy
metadata:
  name: host-egress-cert-manager
spec:
  nodeSelector: {}
  egress:
    - toEndpoints:
        - matchLabels:
            k8s:io.kubernetes.pod.namespace: cert-manager
      toPorts:
        - ports:
            - port: "6080"
              protocol: TCP
            - port: "9403"
              protocol: TCP
            - port: "10250"
              protocol: TCP

---
# cert-manager cainjector: only needs apiserver.
apiVersion: cilium.io/v2
kind: CiliumNetworkPolicy
metadata:
  name: cert-manager-cainjector
  namespace: cert-manager
spec:
  endpointSelector:
    matchLabels:
      app.kubernetes.io/component: cainjector
  ingress: []
  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