Procedure

1. Specify a blank node selector for the openshift-storage namespace.

   $ oc annotate namespace openshift-storage openshift.io/node-selector=

2. Delete the original pods generated by the DaemonSets.

   oc delete pod -l app=csi-cephfsplugin -n openshift-storage
   oc delete pod -l app=csi-rbdplugin -n openshift-storage

1. Check the storage class associated with OpenShift Container Storage cluster’s PVCs with the following command:

   $ oc get pvc -n openshift-storage

2. Check the output. For clusters with Local Storage Operator, the PVCs associated with ocs-deviceset use the storage class localblock. The output looks similar to the following:

   NAME                      STATUS   VOLUME                                     CAPACITY   ACCESS MODES   STORAGECLASS                  AGE
   db-noobaa-db-0            Bound    pvc-d96c747b-2ab5-47e2-b07e-1079623748d8   50Gi       RWO            ocs-storagecluster-ceph-rbd   114s
   ocs-deviceset-0-0-lzfrd   Bound    local-pv-7e70c77c                          1769Gi     RWO            localblock                    2m10s
   ocs-deviceset-1-0-7rggl   Bound    local-pv-b19b3d48                          1769Gi     RWO            localblock                    2m10s
   ocs-deviceset-2-0-znhk8   Bound    local-pv-e9f22cdc                          1769Gi     RWO            localblock                    2m10s

1. Check if the openshift-storage namespace is stuck in Terminating state upon deletion.

   $ oc get project openshift-storage

   Output:

   NAME                DISPLAY NAME   STATUS
   openshift-storage                  Terminating

2. Check for the NamespaceFinalizersRemaining and NamespaceContentRemaining messages in the STATUS section of the command output and perform the next step for each of the listed resources.

   $ oc get project openshift-storage -o yaml

   Example output :

   status:
     conditions:
     - lastTransitionTime: "2020-07-26T12:32:56Z"
       message: All resources successfully discovered
       reason: ResourcesDiscovered
       status: "False"
       type: NamespaceDeletionDiscoveryFailure
     - lastTransitionTime: "2020-07-26T12:32:56Z"
       message: All legacy kube types successfully parsed
       reason: ParsedGroupVersions
       status: "False"
       type: NamespaceDeletionGroupVersionParsingFailure
     - lastTransitionTime: "2020-07-26T12:32:56Z"
       message: All content successfully deleted, may be waiting on finalization
       reason: ContentDeleted
       status: "False"
       type: NamespaceDeletionContentFailure
     - lastTransitionTime: "2020-07-26T12:32:56Z"
       message: 'Some resources are remaining: cephobjectstoreusers.ceph.rook.io has
         1 resource instances'
       reason: SomeResourcesRemain
       status: "True"
       type: NamespaceContentRemaining
     - lastTransitionTime: "2020-07-26T12:32:56Z"
       message: 'Some content in the namespace has finalizers remaining: cephobjectstoreuser.ceph.rook.io
         in 1 resource instances'
       reason: SomeFinalizersRemain
       status: "True"
       type: NamespaceFinalizersRemaining

3. Delete all the remaining resources listed in the previous step.

   For each of the resources to be deleted, do the following:

   1. Get the object kind of the resource which needs to be removed. See the message in the above output.

      Example :

      message: Some content in the namespace has finalizers remaining: cephobjectstoreuser.ceph.rook.io

      Here cephobjectstoreuser.ceph.rook.io is the object kind.

   2. Get the Object name corresponding to the object kind.

      $ oc get  <Object-kind> -n  <project-name>

      Example :

      $ oc get cephobjectstoreusers.ceph.rook.io -n openshift-storage

      Example output:

      NAME                           AGE
      noobaa-ceph-objectstore-user   26h

   3. Patch the resources.

      $ oc patch -n <project-name> <object-kind>/<object-name> --type=merge -p '{"metadata": {"finalizers":null}}'

      Example:

      $ oc patch -n openshift-storage cephobjectstoreusers.ceph.rook.io/noobaa-ceph-objectstore-user \
      --type=merge -p '{"metadata": {"finalizers":null}}'

      Output:

      cephobjectstoreuser.ceph.rook.io/noobaa-ceph-objectstore-user patched

4. Verify that the openshift-storage project is deleted.

   $ oc get project  openshift-storage

   Output:

   Error from server (NotFound): namespaces "openshift-storage" not found

   If the issue persists, reach out to Red Hat Support.

1. Check for CephFS pvc stuck in Pending status.

   $ oc get pvc

   Example output :

   NAME                      STATUS    VOLUME
   CAPACITY  ACCESS MODES    STORAGECLASS                        AGE
   ngx-fs-pxknkcix20-pod     Pending
                             ocs-external-storagecluster-cephfs  28h
   [...]

2. Check the describe output to see the events for respective pvc.

   Expected error message is cephfs_metadata/csi.volumes.default/csi.volume.pvc-xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx: (1) Operation not permitted)

   # oc describe pvc ngx-fs-pxknkcix20-pod -n nginx-file

   Example output:

   Name:          ngx-fs-pxknkcix20-pod
   Namespace:     nginx-file
   StorageClass:  ocs-external-storagecluster-cephfs
   Status:        Pending
   Volume:
   Labels:        <none>
   Annotations:   volume.beta.kubernetes.io/storage-provisioner: openshift-storage.cephfs.csi.ceph.com
   Finalizers:    [kubernetes.io/pvc-protection]
   Capacity:
   Access Modes:
   VolumeMode:    Filesystem
   Mounted By:    ngx-fs-oyoe047v2bn2ka42jfgg-pod-hqhzf
   Events:
    Type     Reason              Age                   From                                                                                                                      Message
    ----     ------              ----                  ----                                                                                                                      -------
    Warning  ProvisioningFailed  107m (x245 over 22h)  openshift-storage.cephfs.csi.ceph.com_csi-cephfsplugin-provisioner-5f8b66cc96-hvcqp_6b7044af-c904-4795-9ce5-bf0cf63cc4a4
    (combined from similar events): failed to provision volume with StorageClass "ocs-external-storagecluster-cephfs": rpc error: code = Internal desc = error (an error (exit status 1) occurred while
    running rados args: [-m 192.168.13.212:6789,192.168.13.211:6789,192.168.13.213:6789 --id csi-cephfs-provisioner --keyfile=stripped -c /etc/ceph/ceph.conf -p cephfs_metadata getomapval
    csi.volumes.default csi.volume.pvc-1ac0c6e6-9428-445d-bbd6-1284d54ddb47 /tmp/omap-get-186436239 --namespace=csi]) occurred, command output streams is ( error getting omap value
    cephfs_metadata/csi.volumes.default/csi.volume.pvc-1ac0c6e6-9428-445d-bbd6-1284d54ddb47: (1) Operation not permitted)

3. Check the settings for the <cephfs metadata pool name> (here cephfs_metadata ) and <cephfs data pool name> (here cephfs_data). For running the command, you will need jq preinstalled in the Red Hat Ceph Storage client node.

   # ceph osd pool ls detail --format=json | jq '.[] | select(.pool_name| startswith("cephfs")) | .pool_name, .application_metadata' "cephfs_data"
   {
     "cephfs": {}
   }
   "cephfs_metadata"
   {
      "cephfs": {}
   }

4. Set the application type for CephFS pool.

   • Run the following commands on the Red Hat Ceph Storage client node :

     # ceph osd pool application set <cephfs metadata pool name> cephfs metadata cephfs

     # ceph osd pool application set <cephfs data pool name> cephfs data cephfs

5. Verify if the settings are applied.

    # ceph osd pool ls detail --format=json | jq '.[] | select(.pool_name| startswith("cephfs")) | .pool_name, .application_metadata' "cephfs_data"
     {
       "cephfs": {
         "data": "cephfs"
      }
     }
     "cephfs_metadata"
     {
       "cephfs": {
         "metadata": "cephfs"
       }
     }

6. Check the CephFS PVC status again. The PVC should now be in Bound state.

     # oc get pvc

   Example output :

   NAME                      STATUS    VOLUME
   CAPACITY  ACCESS MODES    STORAGECLASS                        AGE
   ngx-fs-pxknkcix20-pod     Bound     pvc-1ac0c6e6-9428-445d-bbd6-1284d54ddb47
   1Mi       RWO             ocs-external-storagecluster-cephfs  29h
   [...]