kyverno-policy-sample-postgres.yaml

apiVersion: kyverno.io/v1
kind: ClusterPolicy
metadata:
  name: enforce-postgres-cluster-config
spec:
  validationFailureAction: enforce
  rules:
  - name: enforce-min-instances-storage
    match:
      resources:
        kinds:
        - postgresql.k8s.enterprisedb.io/v1/Cluster
    validate:
      message: "The Postgres cluster must have at least 3 instances and 10Gi storage."
      pattern:
        spec:
          instances: ">=3"
          storage:
            size: ">=10Gi"