# NetworkPolicy for approval-service.
#
# Cluster-wide NetworkPolicy enforcement is already active on BasicStack
# (see cluster memory on NetworkPolicy activation). Any pod in agent-trust
# without a policy is isolated by default; this file is the explicit
# allow-list for approval-service.
#
# Ingress: only from the Pangolin ingress edge (public traffic terminates
# at Pangolin/Traefik; nothing in-cluster calls approval-service
# directly in Phase 1).
# Egress:  signing-service (:8081) + transparency-log (:8080) in
# agent-trust, Pocket-ID (:1411) for OIDC discovery/JWKS, DNS, and (once
# trust-pg lands) a Postgres :5432 egress to trust-pg in agent-trust.
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: approval-service
  namespace: agent-trust
  labels:
    app.kubernetes.io/name: approval-service
    app.kubernetes.io/part-of: proofedmesh
spec:
  podSelector:
    matchLabels:
      app.kubernetes.io/name: approval-service
  policyTypes:
    - Ingress
    - Egress
  ingress:
    # Public traffic reaches approval-service only via the Pangolin edge
    # (Traefik lives inside the Pangolin namespace). Keep this list
    # conservative — add additional callers on demand, not speculatively.
    - from:
        - namespaceSelector:
            matchLabels:
              kubernetes.io/metadata.name: pangolin
      ports:
        - port: 8080
          protocol: TCP
  egress:
    # signing-service (ADR-0005 signer) + transparency-log (Trillian frontend)
    # live in the same agent-trust namespace; future trust-pg will too.
    - to:
        - namespaceSelector:
            matchLabels:
              kubernetes.io/metadata.name: agent-trust
          podSelector:
            matchLabels:
              app.kubernetes.io/name: signing-service
      ports:
        - port: 8081
          protocol: TCP
    - to:
        - namespaceSelector:
            matchLabels:
              kubernetes.io/metadata.name: agent-trust
          podSelector:
            matchLabels:
              app.kubernetes.io/name: transparency-log
      ports:
        - port: 8080
          protocol: TCP
    # Future trust-pg Postgres egress — pre-authorised here so the pod
    # does not need a NetworkPolicy edit when DEV-607's prod store lands.
    - to:
        - namespaceSelector:
            matchLabels:
              kubernetes.io/metadata.name: agent-trust
          podSelector:
            matchLabels:
              app.kubernetes.io/name: trust-pg
      ports:
        - port: 5432
          protocol: TCP
    # Pocket-ID for OIDC discovery + token endpoint.
    - to:
        - namespaceSelector:
            matchLabels:
              kubernetes.io/metadata.name: pocket-id
          podSelector:
            matchLabels:
              app: pocket-id
      ports:
        - port: 1411
          protocol: TCP
    # DNS egress to kube-system CoreDNS.
    - to:
        - namespaceSelector:
            matchLabels:
              kubernetes.io/metadata.name: kube-system
          podSelector:
            matchLabels:
              k8s-app: kube-dns
      ports:
        - port: 53
          protocol: UDP
        - port: 53
          protocol: TCP