Chapter 10. Troubleshooting CephFS PVC creation in external mode If you have updated the Red Hat Ceph Storage cluster from a version lower than 4.1.1 to the latest release and is not a freshly deployed cluster, you must manually set the application type for the CephFS pool on the Red Hat Ceph Storage cluster to enable CephFS Persistent Volume Claim (PVC) creation in external mode. Check for CephFS pvc stuck in Pending status. Example output : Check the output of the oc describe command 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) Example output: 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. Set the application type for the CephFS pool. Run the following commands on the Red Hat Ceph Storage client node : Verify if the settings are applied. Check the CephFS PVC status again. The PVC should now be in Bound state. Example output :

Commands:
oc get pvc -n <namespace>
NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS AGE ngx-fs-pxknkcix20-pod Pending ocs-external-storagecluster-cephfs 28h [...]
oc describe pvc ngx-fs-pxknkcix20-pod -n nginx-file
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)
ceph osd pool ls detail --format=json | jq '.[] | select(.pool_name| startswith("cephfs")) | .pool_name, .application_metadata' "cephfs_data" { "cephfs": {} } "cephfs_metadata" { "cephfs": {} }
ceph osd pool application set <cephfs metadata pool name> cephfs metadata cephfs
ceph osd pool application set <cephfs data pool name> cephfs data cephfs
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" } }
oc get pvc -n <namespace>
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 [...]