apiVersion: kyverno.io/v1
kind: ClusterPolicy
metadata:
  name: restrict-image-registries
  annotations:
    policies.kyverno.io/title: Restrict image registries (audit)
    policies.kyverno.io/category: Supply Chain
    policies.kyverno.io/severity: medium
    policies.kyverno.io/description: >-
      Audit containers that pull outside the internal registry endpoints ahead
      of Phase 4 image trust. Zot repository access is enforced separately.
spec:
  validationFailureAction: Audit
  background: true
  rules:
    - name: allow-internal-registries-only
      match:
        any:
          - resources:
              kinds:
                - Pod
      exclude:
        any:
          - resources:
              namespaces:
                - kube-system
                - kube-public
                - kube-node-lease
                - flux-system
                - flux-canary
                - kyverno
                - cert-manager
                - cilium-secrets
                - olm
                - operators
                - longhorn
                - openebs
                - intel-system
                - nfd
      validate:
        message: >-
          Prefer an internal registry endpoint. External registries are inventory
          for the mirror/promote pipeline, and Zot repositories are separately
          restricted.
        foreach:
          - list: "request.object.spec.[initContainers, ephemeralContainers, containers][]"
            deny:
              conditions:
                all:
                  - key: >-
                      {{ regex_match('^(quay\.quorate\.internal/|zot\.quorate\.internal/|registry\.quorate\.internal/)', element.image) }}
                    operator: Equals
                    value: false