Validate with specifying custom storage class about monitoring HOT 1 CLOSED

$ kubectl get pvc
NAME                                                           STATUS   VOLUME                                     CAPACITY   ACCESS MODES   STORAGECLASS    AGE
alert-alertmanager-openebs-monitoring-kube-pr-alertmanager-0   Bound    pvc-07dac646-4345-4e43-868b-e10fb25a01d4   10Gi       RWO            cstorsc-ooqun   18m
prom-prometheus-openebs-monitoring-kube-pr-prometheus-0        Bound    pvc-66297f2b-d850-4a8f-8f72-331fbfb0202f   10Gi       RWO            cstorsc-ooqun   18m

$ kubectl get pv
NAME                                       CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS   CLAIM                                                                              STORAGECLASS           REASON   AGE
pvc-07dac646-4345-4e43-868b-e10fb25a01d4   10Gi       RWO            Delete           Bound    prometheus-operator/alert-alertmanager-openebs-monitoring-kube-pr-alertmanager-0   cstorsc-ooqun                   19m
pvc-66297f2b-d850-4a8f-8f72-331fbfb0202f   10Gi       RWO            Delete           Bound    prometheus-operator/prom-prometheus-openebs-monitoring-kube-pr-prometheus-0        cstorsc-ooqun                   19m

$ kubectl describe pvc alert-alertmanager-openebs-monitoring-kube-pr-alertmanager-0
Name:          alert-alertmanager-openebs-monitoring-kube-pr-alertmanager-0
Namespace:     prometheus-operator
StorageClass:  cstorsc-ooqun
Status:        Bound
Volume:        pvc-07dac646-4345-4e43-868b-e10fb25a01d4
Labels:        alertmanager=openebs-monitoring-kube-pr-alertmanager
               app=alertmanager
               app.kubernetes.io/instance=openebs-monitoring-kube-pr-alertmanager
               app.kubernetes.io/managed-by=prometheus-operator
               app.kubernetes.io/name=alertmanager
               app.kubernetes.io/version=v0.21.0
Annotations:   pv.kubernetes.io/bind-completed: yes
               pv.kubernetes.io/bound-by-controller: yes
               volume.beta.kubernetes.io/storage-provisioner: cstor.csi.openebs.io
Finalizers:    [kubernetes.io/pvc-protection]
Capacity:      10Gi
Access Modes:  RWO
VolumeMode:    Filesystem
Mounted By:    alertmanager-openebs-monitoring-kube-pr-alertmanager-0
Events:
  Type    Reason                 Age   From                                                                                      Message
  ----    ------                 ----  ----                                                                                      -------
  Normal  Provisioning           21m   cstor.csi.openebs.io_openebs-cstor-csi-controller-0_00bc9b04-e30f-4d57-ad20-41e85db1ad61  External provisioner is provisioning volume for claim "prometheus-operator/alert-alertmanager-openebs-monitoring-kube-pr-alertmanager-0"
  Normal  ExternalProvisioning   21m   persistentvolume-controller                                                               waiting for a volume to be created, either by external provisioner "cstor.csi.openebs.io" or manually created by system administrator
  Normal  ProvisioningSucceeded  21m   cstor.csi.openebs.io_openebs-cstor-csi-controller-0_00bc9b04-e30f-4d57-ad20-41e85db1ad61  Successfully provisioned volume pvc-07dac646-4345-4e43-868b-e10fb25a01d4