envoy-gateway-system: NetworkPolicy

2026-11-15 22:29:09 +01:00 · 2026-10-26 23:28:05 +01:00
1 changed files with 120 additions and 0 deletions
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 # Envoy Gateway: the controller and the proxy it runs (envoyproxy.yaml).
 # Both reach each other (the proxy gets its config from the controller on
 # 18000) and DNS, and take connections from each other and the node: the
 # API server calls the controller's topology webhook (9443) from there and
 # the kubelet probes come from there too (10.1.7.64 is the node's Calico
 # VXLAN address, projectcalico.org/IPv4VXLANTunnelAddr). Nothing scrapes
 # the metrics on 19001.
 apiVersion: networking.k8s.io/v1
 kind: NetworkPolicy
 metadata:
  name: default
  namespace: envoy-gateway-system
 spec:
  podSelector: {}
  policyTypes:
    - Ingress
    - Egress
  ingress:
    - from:
        - podSelector: {}
    - from:
        - ipBlock:
            cidr: 192.168.1.204/32
        - ipBlock:
            cidr: 10.1.7.64/32
  egress:
    - to:
        - podSelector: {}
    - to:
        - namespaceSelector:
            matchLabels:
              kubernetes.io/metadata.name: kube-system
          podSelector:
            matchLabels:
              k8s-app: kube-dns
      ports:
        - protocol: UDP
          port: 53
        - protocol: TCP
          port: 53
 ---
 # The proxy holds the node's ports 80 and 443 (10080 and 10443 inside) and
 # takes connections there from anywhere: the internet through node001 and
 # the router, the LAN, and pods that call a public hostname. It reaches
 # every app it routes to (pods in any namespace; their own policies decide
 # which port), Home Assistant on 192.168.1.202:8123 (outside the cluster,
 # home-assistant/), and the internet on 443 for Longhorn's OIDC login
 # (authentik's token endpoint, at its public address).
 apiVersion: networking.k8s.io/v1
 kind: NetworkPolicy
 metadata:
  name: proxy
  namespace: envoy-gateway-system
 spec:
  podSelector:
    matchLabels:
      app.kubernetes.io/name: envoy
      app.kubernetes.io/component: proxy
  policyTypes:
    - Ingress
    - Egress
  ingress:
    - ports:
        - port: 10080
        - port: 10443
  egress:
    - to:
        - namespaceSelector: {}
    - to:
        - ipBlock:
            cidr: 192.168.1.202/32
      ports:
        - port: 8123
    - to:
        - ipBlock:
            cidr: 0.0.0.0/0
            except:
              - 10.0.0.0/8
              - 100.64.0.0/10
              - 169.254.0.0/16
              - 172.16.0.0/12
              - 192.168.0.0/16
      ports:
        - port: 443
 ---
 # Everything but the proxy (the controller, and the chart's certgen job on
 # upgrades) reaches the API server (the node, port 16443). The controller
 # also fetches the OIDC discovery document of Longhorn's SecurityPolicy
 # from authentik's public address.
 apiVersion: networking.k8s.io/v1
 kind: NetworkPolicy
 metadata:
  name: control-plane
  namespace: envoy-gateway-system
 spec:
  podSelector:
    matchExpressions:
      - key: app.kubernetes.io/name
        operator: NotIn
        values:
          - envoy
  policyTypes:
    - Egress
  egress:
    - to:
        - ipBlock:
            cidr: 192.168.1.204/32
      ports:
        - port: 16443
    - to:
        - ipBlock:
            cidr: 0.0.0.0/0
            except:
              - 10.0.0.0/8
              - 100.64.0.0/10
              - 169.254.0.0/16
              - 172.16.0.0/12
              - 192.168.0.0/16
      ports:
        - port: 443