kyverno/test/best_practices/require_labels.yaml

---
apiVersion: kyverno.io/v1
kind: ClusterPolicy
metadata:
  name: require-labels
spec:
  admission: true
  background: true
  rules:
  - match:
      any:
      - resources:
          kinds:
          - Pod
    name: check-for-labels
    validate:
      message: The label `app.kubernetes.io/name` is required.
      pattern:
        metadata:
          labels:
            app.kubernetes.io/name: ?*
  validationFailureAction: Audit