Restrict StorageClass

apiVersion: kyverno.io/v1
kind: ClusterPolicy
metadata:
  name: restrict-storageclass
  annotations:
    policies.kyverno.io/title: Restrict StorageClass
    policies.kyverno.io/category: Other, Multi-Tenancy
    policies.kyverno.io/severity: medium
    policies.kyverno.io/subject: StorageClass
    policies.kyverno.io/description: StorageClasses allow description of custom "classes" of storage offered by the cluster, based on quality-of-service levels, backup policies, or custom policies determined by the cluster administrators. For shared StorageClasses in a multi-tenancy environment, a reclaimPolicy of `Delete` should be used to ensure a PersistentVolume cannot be reused across Namespaces. This policy requires StorageClasses set a reclaimPolicy of `Delete`.
spec:
  validationFailureAction: Audit
  background: true
  rules:
    - name: storageclass-delete
      match:
        any:
          - resources:
              kinds:
                - StorageClass
      validate:
        message: StorageClass must define a reclaimPolicy of Delete.
        pattern:
          reclaimPolicy: Delete