GistPin/infrastructure/k8s/cilium/network-policies.yml at main · ghzhost/GistPin · GitHub

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---
apiVersion: cilium.io/v2
kind: CiliumNetworkPolicy
metadata:
  name: default-deny-ingress
spec:
  endpointSelector: {}
  ingress: []

---
apiVersion: cilium.io/v2
kind: CiliumNetworkPolicy
metadata:
  name: default-deny-egress
spec:
  endpointSelector: {}
  egress: []

---
apiVersion: cilium.io/v2
kind: CiliumNetworkPolicy
metadata:
  name: allow-dns
spec:
  endpointSelector: {}

  egress:
    - toEndpoints:
        - matchLabels:
            k8s:io.kubernetes.pod.namespace: kube-system
            k8s:k8s-app: kube-dns

      toPorts:
        - ports:
            - port: "53"
              protocol: UDP
            - port: "53"
              protocol: TCP

---
apiVersion: cilium.io/v2
kind: CiliumNetworkPolicy
metadata:
  name: allow-kube-apiserver
spec:
  endpointSelector: {}

  egress:
    - toEntities:
        - kube-apiserver

---
apiVersion: cilium.io/v2
kind: CiliumNetworkPolicy
metadata:
  name: allow-health-checks
spec:
  endpointSelector: {}

  ingress:
    - fromEntities:
        - remote-node
        - host

---
apiVersion: cilium.io/v2
kind: CiliumNetworkPolicy
metadata:
  name: allow-intra-namespace
spec:
  endpointSelector: {}

  ingress:
    - fromEndpoints:
        - {}

  egress:
    - toEndpoints:
        - {}

---
apiVersion: cilium.io/v2
kind: CiliumNetworkPolicy
metadata:
  name: allow-monitoring
spec:
  endpointSelector: {}

  ingress:
    - fromEndpoints:
        - matchLabels:
            k8s:io.kubernetes.pod.namespace: monitoring

      toPorts:
        - ports:
            - port: "9090"
              protocol: TCP
            - port: "9962"
              protocol: TCP
            - port: "4244"
              protocol: TCP

---
apiVersion: cilium.io/v2
kind: CiliumNetworkPolicy
metadata:
  name: ingress-controller-to-frontend
spec:
  endpointSelector:
    matchLabels:
      app: frontend

  ingress:
    - fromEndpoints:
        - matchLabels:
            app: ingress-nginx

      toPorts:
        - ports:
            - port: "80"
              protocol: TCP
            - port: "443"
              protocol: TCP

---
apiVersion: cilium.io/v2
kind: CiliumNetworkPolicy
metadata:
  name: frontend-to-backend
spec:
  endpointSelector:
    matchLabels:
      app: backend

  ingress:
    - fromEndpoints:
        - matchLabels:
            app: frontend

      toPorts:
        - ports:
            - port: "8080"
              protocol: TCP

          rules:
            http:
              - method: GET
              - method: POST
              - method: PUT
              - method: DELETE

---
apiVersion: cilium.io/v2
kind: CiliumNetworkPolicy
metadata:
  name: backend-to-database
spec:
  endpointSelector:
    matchLabels:
      app: database

  ingress:
    - fromEndpoints:
        - matchLabels:
            app: backend

      toPorts:
        - ports:
            - port: "5432"
              protocol: TCP

---
apiVersion: cilium.io/v2
kind: CiliumNetworkPolicy
metadata:
  name: allow-prometheus-scraping
spec:
  endpointSelector:
    matchLabels:
      prometheus.io/scrape: "true"

  ingress:
    - fromEndpoints:
        - matchLabels:
            app.kubernetes.io/name: prometheus

      toPorts:
        - ports:
            - port: "9090"
              protocol: TCP
            - port: "9962"
              protocol: TCP

---
apiVersion: cilium.io/v2
kind: CiliumNetworkPolicy
metadata:
  name: allow-hubble-ui
spec:
  endpointSelector:
    matchLabels:
      app.kubernetes.io/name: hubble-relay

  ingress:
    - fromEndpoints:
        - matchLabels:
            app.kubernetes.io/name: hubble-ui

      toPorts:
        - ports:
            - port: "4245"
              protocol: TCP

---
apiVersion: cilium.io/v2
kind: CiliumNetworkPolicy
metadata:
  name: allow-world-egress
spec:
  endpointSelector: {}

  egress:
    - toEntities:
        - world

---
apiVersion: cilium.io/v2
kind: CiliumNetworkPolicy
metadata:
  name: allow-node-traffic
spec:
  endpointSelector: {}

  ingress:
    - fromEntities:
        - host
        - remote-node

  egress:
    - toEntities:
        - host
        - remote-node