apiVersion: kyverno.io/v1
kind: ClusterPolicy
metadata:
  name: restrict-gateway-client-label
  annotations:
    policies.kyverno.io/title: Restrict Gateway client privilege label
    policies.kyverno.io/category: Gateway API
    policies.kyverno.io/severity: medium
    policies.kyverno.io/description: >-
      Only approved namespaces may set gateway.quorate.internal/allow-gateway-client.
spec:
  validationFailureAction: Enforce
  background: true
  rules:
    - name: gateway-client-label-namespace-allowlist
      match:
        any:
          - resources:
              kinds:
                - Pod
      preconditions:
        all:
          - key: >-
              {{ request.object.metadata.labels."gateway.quorate.internal/allow-gateway-client" || '' }}
            operator: Equals
            value: "true"
      validate:
        message: >-
          gateway.quorate.internal/allow-gateway-client is only allowed on pods
          in approved OIDC client namespaces (forgejo, forgejo-public, grafana,
          longhorn, quay).
        deny:
          conditions:
            all:
              - key: "{{ request.namespace }}"
                operator: AnyNotIn
                value:
                  - forgejo
                  - forgejo-public
                  - grafana
                  - longhorn
                  - quay