approval-engine/deploy/networkpolicies.yaml

apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: approval-engine-default-deny
  namespace: approval-engine
spec:
  podSelector: {}
  policyTypes: [Ingress, Egress]
---
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: approval-engine-callers
  namespace: approval-engine
spec:
  podSelector:
    matchLabels:
      app.kubernetes.io/name: approval-engine
  policyTypes: [Ingress]
  ingress:
    - from:
        - namespaceSelector:
            matchLabels:
              kubernetes.io/metadata.name: secrets-engine
        - namespaceSelector:
            matchLabels:
              railiance.io/approval-engine-client: "true"
      ports:
        - {protocol: TCP, port: 8080}
---
# NetKingdom bounded executor (NK-WP-0056, APPROVAL-WP-0007; hub request
# 39a3bffa). One Job per admission in namespace sso, ServiceAccount
# nk-bind-executor. It GETs and consumes its own approval on 8080.
# Pod-scoped on purpose: namespaceSelector and podSelector sit in ONE `from`
# element, so both must match. Labelling all of sso as an approval-engine
# client would also admit KeyCape, Authelia and LLDAP. Network admission is
# not authority: the executor still needs its KeyCape token and scopes.
# Prepared in source; live apply is founder-run.
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: approval-engine-bounded-executor
  namespace: approval-engine
spec:
  podSelector:
    matchLabels:
      app.kubernetes.io/name: approval-engine
  policyTypes: [Ingress]
  ingress:
    - from:
        - namespaceSelector:
            matchLabels:
              kubernetes.io/metadata.name: sso
          podSelector:
            matchLabels:
              app.kubernetes.io/name: bounded-executor
      ports:
        - {protocol: TCP, port: 8080}
---
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: approval-engine-egress
  namespace: approval-engine
spec:
  podSelector:
    matchLabels:
      app.kubernetes.io/name: approval-engine
  policyTypes: [Egress]
  egress:
    - to:
        - namespaceSelector:
            matchLabels:
              kubernetes.io/metadata.name: sso
      ports:
        - {protocol: TCP, port: 8080}
    - to:
        - namespaceSelector:
            matchLabels:
              kubernetes.io/metadata.name: audit-core
      ports:
        - {protocol: TCP, port: 8080}
    - to:
        - namespaceSelector:
            matchLabels:
              kubernetes.io/metadata.name: kube-system
      ports:
        - {protocol: UDP, port: 53}
        - {protocol: TCP, port: 53}