homelab/k8s/infra/forgejo-runner/templates/networkpolicy.yaml

apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: {{ .Release.Name }}-egress
  namespace: {{ .Release.Namespace }}
spec:
  podSelector:
    matchLabels:
      app: {{ .Release.Name }}
  policyTypes: [Egress]
  egress:
    # Forgejo — same cicd namespace (git push, registry push/pull)
    - to:
        - podSelector: {}
    # CoreDNS
    - to:
        - namespaceSelector:
            matchLabels:
              kubernetes.io/metadata.name: kube-system
      ports:
        - protocol: UDP
          port: 53
        - protocol: TCP
          port: 53
    # Internet (action deps, base images) — never LAN or pod network
    - to:
        - ipBlock:
            cidr: 0.0.0.0/0
            except:
              - 192.168.1.0/24
              - 10.244.0.0/16
    # ingress-nginx, which is how forgejo.riotpiao.com resolves (CoreDNS
    # rewrites that name to ingress-nginx-controller.ingress-nginx.svc).
    # Image pushes go to that name so the tag matches what containerd pulls
    # on the nodes; without this the whole /24 and pod CIDR are denied above
    # and `docker push`/`docker login` hang until they time out.
    #
    # Was an ipBlock pinned to the ingress-nginx LoadBalancer's LAN IP. That
    # stopped matching once DNS started resolving the name to the Service's
    # ClusterIP instead of the LB IP: Cilium enforces egress against the
    # post-DNAT pod IP, which falls inside the 10.244.0.0/16 exclusion above,
    # so every request silently hung rather than erroring. A namespaceSelector
    # follows the Service wherever it resolves and needs no IP to stay in
    # sync with -- same pattern as the kube-system DNS rule above.
    - to:
        - namespaceSelector:
            matchLabels:
              kubernetes.io/metadata.name: ingress-nginx
      ports:
        - protocol: TCP
          port: 443