apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: mysql-data-pvc
spec:
  # Must explicitly match the storageClassName already on the live PVC.
  # Without this, kubectl apply diffs nil (base has no field) vs "local-path"
  # (cluster) and tries to mutate a bound PVC — which Kubernetes forbids.
  storageClassName: local-path
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 5Gi