Chapter 2. OpenShift Container Storage deployed using local storage devices

Procedure

1. Identify the NODE and get labels on the node to be replaced.

   $ oc get nodes --show-labels | grep <node_name>

   Copy to Clipboard Toggle word wrap

2. Identify the mon (if any) and OSDs that are running in the node to be replaced.

   $ oc get pods -n openshift-storage -o wide | grep -i <node_name>

   Copy to Clipboard Toggle word wrap

3. Scale down the deployments of the pods identified in the previous step.

   For example:

   $ oc scale deployment rook-ceph-mon-c --replicas=0 -n openshift-storage
   $ oc scale deployment rook-ceph-osd-0 --replicas=0 -n openshift-storage
   $ oc scale deployment --selector=app=rook-ceph-crashcollector,node_name=<node_name>  --replicas=0 -n openshift-storage

   Copy to Clipboard Toggle word wrap

4. Mark the node as unschedulable.

   $ oc adm cordon <node_name>

   Copy to Clipboard Toggle word wrap

5. Drain the node.

   $ oc adm drain <node_name> --force --delete-local-data --ignore-daemonsets

   Copy to Clipboard Toggle word wrap

6. Delete the node.

   $ oc delete node <node_name>

   Copy to Clipboard Toggle word wrap

7. Get a new bare metal machine with required infrastructure. See Installing a cluster on bare metal.

   Important

   For information about how to replace a master node when you have installed OpenShift Container Storage on a three-node OpenShift compact bare-metal cluster, see the Backup and Restore guide in the OpenShift Container Platform documentation.

8. Create a new OpenShift Container Platform node using the new bare metal machine.

9. Check for certificate signing requests (CSRs) related to OpenShift Container Platform that are in Pending state:

   $ oc get csr

   Copy to Clipboard Toggle word wrap

10. Approve all required OpenShift Container Platform CSRs for the new node:

    $ oc adm certificate approve <Certificate_Name>

    Copy to Clipboard Toggle word wrap
11. Click Compute Nodes in OpenShift Web Console, confirm if the new node is in Ready state.

12. Apply the OpenShift Container Storage label to the new node using any one of the following:

    From User interface

    1. For the new node, click Action Menu (⋮) Edit Labels.
    2. Add cluster.ocs.openshift.io/openshift-storage and click Save.

    From Command line interface

    • Execute the following command to apply the OpenShift Container Storage label to the new node:

      $ oc label node <new_node_name> cluster.ocs.openshift.io/openshift-storage=""

      Copy to Clipboard Toggle word wrap

13. Identify the namespace where OpenShift local storage operator is installed and assign it to local_storage_project variable:

    $ local_storage_project=$(oc get csv --all-namespaces | awk '{print $1}' | grep local)

    Copy to Clipboard Toggle word wrap

    For example:

    $ local_storage_project=$(oc get csv --all-namespaces | awk '{print $1}' | grep local)
    echo $local_storage_project
    openshift-local-storage

    Copy to Clipboard Toggle word wrap

14. Add a new worker node to localVolumeDiscovery and localVolumeSet.

    1. Update the localVolumeDiscovery definition to include the new node and remove the failed node.

       # oc edit -n $local_storage_project localvolumediscovery auto-discover-devices
       [...]
          nodeSelector:
           nodeSelectorTerms:
             - matchExpressions:
                 - key: kubernetes.io/hostname
                   operator: In
                   values:
                   - server1.example.com
                   - server2.example.com
                   #- server3.example.com
                   - newnode.example.com
       [...]

       Copy to Clipboard Toggle word wrap

       Remember to save before exiting the editor.

       In the above example, server3.example.com was removed and newnode.example.com is the new node.

    2. Determine which localVolumeSet to edit.

       # oc get -n $local_storage_project localvolumeset
       NAME          AGE
       localblock   25h

       Copy to Clipboard Toggle word wrap

    3. Update the localVolumeSet definition to include the new node and remove the failed node.

       # oc edit -n $local_storage_project localvolumeset localblock
       [...]
          nodeSelector:
           nodeSelectorTerms:
             - matchExpressions:
                 - key: kubernetes.io/hostname
                   operator: In
                   values:
                   - server1.example.com
                   - server2.example.com
                   #- server3.example.com
                   - newnode.example.com
       [...]

       Copy to Clipboard Toggle word wrap

       Remember to save before exiting the editor.

       In the above example, server3.example.com was removed and newnode.example.com is the new node.

15. Verify that the new localblock PV is available.

    $oc get pv | grep localblock | grep Available
    local-pv-551d950     512Gi    RWO    Delete  Available
    localblock     26s

    Copy to Clipboard Toggle word wrap

16. Change to the openshift-storage project.

    $ oc project openshift-storage

    Copy to Clipboard Toggle word wrap

17. Remove the failed OSD from the cluster. You can specify multiple failed OSDs if required.

    $ oc process -n openshift-storage ocs-osd-removal \
    -p FAILED_OSD_IDS=failed-osd-id1,failed-osd-id2 | oc create -f -

    Copy to Clipboard Toggle word wrap

18. Verify that the OSD was removed successfully by checking the status of the ocs-osd-removal-job pod.

    A status of Completed confirms that the OSD removal job succeeded.

    # oc get pod -l job-name=ocs-osd-removal-job -n openshift-storage

    Copy to Clipboard Toggle word wrap
    Note

    If ocs-osd-removal-job fails and the pod is not in the expected Completed state, check the pod logs for further debugging. For example:

    # oc logs -l job-name=ocs-osd-removal-job -n openshift-storage

    Copy to Clipboard Toggle word wrap

19. Delete the ocs-osd-removal-job.

    # oc delete -n openshift-storage job ocs-osd-removal-job

    Copy to Clipboard Toggle word wrap

    Example output:

    job.batch "ocs-osd-removal-job" deleted

    Copy to Clipboard Toggle word wrap

Verification steps

1. Execute the following command and verify that the new node is present in the output:

   $ oc get nodes --show-labels | grep cluster.ocs.openshift.io/openshift-storage= |cut -d' ' -f1

   Copy to Clipboard Toggle word wrap

2. Click Workloads Pods, confirm that at least the following pods on the new node are in Running state:

   • csi-cephfsplugin-*
   • csi-rbdplugin-*

3. Verify that all other required OpenShift Container Storage pods are in Running state.

   Ensure that the new incremental mon is created and is in the Running state.

   $ oc get pod -n openshift-storage | grep mon

   Copy to Clipboard Toggle word wrap

   Example output:

   rook-ceph-mon-a-cd575c89b-b6k66         2/2     Running
   0          38m
   rook-ceph-mon-b-6776bc469b-tzzt8        2/2     Running
   0          38m
   rook-ceph-mon-d-5ff5d488b5-7v8xh        2/2     Running
   0          4m8s

   Copy to Clipboard Toggle word wrap

   OSD and Mon might take several minutes to get to the Running state.

4. Verify that new OSD pods are running on the replacement node.

   $ oc get pods -o wide -n openshift-storage| egrep -i new-node-name | egrep osd

   Copy to Clipboard Toggle word wrap

5. (Optional) If cluster-wide encryption is enabled on the cluster, verify that the new OSD devices are encrypted.

   For each of the new nodes identified in previous step, do the following:

   1. Create a debug pod and open a chroot environment for the selected host(s).

      $ oc debug node/<node name>
      $ chroot /host

      Copy to Clipboard Toggle word wrap

   2. Run “lsblk” and check for the “crypt” keyword beside the ocs-deviceset name(s)

      $ lsblk

      Copy to Clipboard Toggle word wrap
6. If verification steps fail, contact Red Hat Support.

Procedure

1. Identify the NODE and get labels on the node to be replaced.

   $ oc get nodes --show-labels | grep <node_name>

   Copy to Clipboard Toggle word wrap

2. Identify the mon (if any) and OSDs that are running in the node to be replaced.

   $ oc get pods -n openshift-storage -o wide | grep -i <node_name>

   Copy to Clipboard Toggle word wrap

3. Scale down the deployments of the pods identified in the previous step.

   For example:

   $ oc scale deployment rook-ceph-mon-c --replicas=0 -n openshift-storage
   $ oc scale deployment rook-ceph-osd-0 --replicas=0 -n openshift-storage
   $ oc scale deployment --selector=app=rook-ceph-crashcollector,node_name=<node_name>  --replicas=0 -n openshift-storage

   Copy to Clipboard Toggle word wrap

4. Mark the node as unschedulable.

   $ oc adm cordon <node_name>

   Copy to Clipboard Toggle word wrap

5. Remove the pods which are in Terminating state.

   $ oc get pods -A -o wide | grep -i <node_name> |  awk '{if ($4 == "Terminating") system ("oc -n " $1 " delete pods " $2  " --grace-period=0 " " --force ")}'

   Copy to Clipboard Toggle word wrap

6. Drain the node.

   $ oc adm drain <node_name> --force --delete-local-data --ignore-daemonsets

   Copy to Clipboard Toggle word wrap

7. Delete the node.

   $ oc delete node <node_name>

   Copy to Clipboard Toggle word wrap

8. Get a new bare metal machine with required infrastructure. See Installing a cluster on bare metal.

   Important

   For information about how to replace a master node when you have installed OpenShift Container Storage on a three-node OpenShift compact bare-metal cluster, see the Backup and Restore guide in the OpenShift Container Platform documentation.

9. Create a new OpenShift Container Platform node using the new bare metal machine.

10. Check for certificate signing requests (CSRs) related to OpenShift Container Platform that are in Pending state:

    $ oc get csr

    Copy to Clipboard Toggle word wrap

11. Approve all required OpenShift Container Platform CSRs for the new node:

    $ oc adm certificate approve <Certificate_Name>

    Copy to Clipboard Toggle word wrap
12. Click Compute Nodes in OpenShift Web Console, confirm if the new node is in Ready state.

13. Apply the OpenShift Container Storage label to the new node using any one of the following:

    From User interface

    1. For the new node, click Action Menu (⋮) Edit Labels.
    2. Add cluster.ocs.openshift.io/openshift-storage and click Save.

    From Command line interface

    • Execute the following command to apply the OpenShift Container Storage label to the new node:

      $ oc label node <new_node_name> cluster.ocs.openshift.io/openshift-storage=""

      Copy to Clipboard Toggle word wrap

14. Identify the namespace where OpenShift local storage operator is installed and assign it to local_storage_project variable:

    $ local_storage_project=$(oc get csv --all-namespaces | awk '{print $1}' | grep local)

    Copy to Clipboard Toggle word wrap

    For example:

    $ local_storage_project=$(oc get csv --all-namespaces | awk '{print $1}' | grep local)
    echo $local_storage_project
    openshift-local-storage

    Copy to Clipboard Toggle word wrap

15. Add a new worker node to localVolumeDiscovery and localVolumeSet.

    1. Update the localVolumeDiscovery definition to include the new node and remove the failed node.

       # oc edit -n $local_storage_project localvolumediscovery auto-discover-devices
       [...]
          nodeSelector:
           nodeSelectorTerms:
             - matchExpressions:
                 - key: kubernetes.io/hostname
                   operator: In
                   values:
                   - server1.example.com
                   - server2.example.com
                   #- server3.example.com
                   - newnode.example.com
       [...]

       Copy to Clipboard Toggle word wrap

       Remember to save before exiting the editor.

       In the above example, server3.example.com was removed and newnode.example.com is the new node.

    2. Determine which localVolumeSet to edit.

       # oc get -n $local_storage_project localvolumeset
       NAME          AGE
       localblock   25h

       Copy to Clipboard Toggle word wrap

    3. Update the localVolumeSet definition to include the new node and remove the failed node.

       # oc edit -n $local_storage_project localvolumeset localblock
       [...]
          nodeSelector:
           nodeSelectorTerms:
             - matchExpressions:
                 - key: kubernetes.io/hostname
                   operator: In
                   values:
                   - server1.example.com
                   - server2.example.com
                   #- server3.example.com
                   - newnode.example.com
       [...]

       Copy to Clipboard Toggle word wrap

       Remember to save before exiting the editor.

       In the above example, server3.example.com was removed and newnode.example.com is the new node.

16. Verify that the new localblock PV is available.

    $oc get pv | grep localblock | grep Available
    local-pv-551d950     512Gi    RWO    Delete  Available
    localblock     26s

    Copy to Clipboard Toggle word wrap

17. Change to the openshift-storage project.

    $ oc project openshift-storage

    Copy to Clipboard Toggle word wrap

18. Remove the failed OSD from the cluster. You can specify multiple failed OSDs if required.

    $ oc process -n openshift-storage ocs-osd-removal \
    -p FAILED_OSD_IDS=failed-osd-id1,failed-osd-id2 | oc create -f -

    Copy to Clipboard Toggle word wrap

19. Verify that the OSD was removed successfully by checking the status of the ocs-osd-removal-job pod.

    A status of Completed confirms that the OSD removal job succeeded.

    # oc get pod -l job-name=ocs-osd-removal-job -n openshift-storage

    Copy to Clipboard Toggle word wrap
    Note

    If ocs-osd-removal-job fails and the pod is not in the expected Completed state, check the pod logs for further debugging. For example:

    # oc logs -l job-name=ocs-osd-removal-job -n openshift-storage

    Copy to Clipboard Toggle word wrap

20. Delete the ocs-osd-removal-job.

    # oc delete -n openshift-storage job ocs-osd-removal-job

    Copy to Clipboard Toggle word wrap

    Example output:

    job.batch "ocs-osd-removal-job" deleted

    Copy to Clipboard Toggle word wrap

Verification steps

1. Execute the following command and verify that the new node is present in the output:

   $ oc get nodes --show-labels | grep cluster.ocs.openshift.io/openshift-storage= |cut -d' ' -f1

   Copy to Clipboard Toggle word wrap

2. Click Workloads Pods, confirm that at least the following pods on the new node are in Running state:

   • csi-cephfsplugin-*
   • csi-rbdplugin-*

3. Verify that all other required OpenShift Container Storage pods are in Running state.

   Ensure that the new incremental mon is created and is in the Running state.

   $ oc get pod -n openshift-storage | grep mon

   Copy to Clipboard Toggle word wrap

   Example output:

   rook-ceph-mon-a-cd575c89b-b6k66         2/2     Running
   0          38m
   rook-ceph-mon-b-6776bc469b-tzzt8        2/2     Running
   0          38m
   rook-ceph-mon-d-5ff5d488b5-7v8xh        2/2     Running
   0          4m8s

   Copy to Clipboard Toggle word wrap

   OSD and Mon might take several minutes to get to the Running state.

4. Verify that new OSD pods are running on the replacement node.

   $ oc get pods -o wide -n openshift-storage| egrep -i new-node-name | egrep osd

   Copy to Clipboard Toggle word wrap

5. (Optional) If cluster-wide encryption is enabled on the cluster, verify that the new OSD devices are encrypted.

   For each of the new nodes identified in previous step, do the following:

   1. Create a debug pod and open a chroot environment for the selected host(s).

      $ oc debug node/<node name>
      $ chroot /host

      Copy to Clipboard Toggle word wrap

   2. Run “lsblk” and check for the “crypt” keyword beside the ocs-deviceset name(s)

      $ lsblk

      Copy to Clipboard Toggle word wrap
6. If verification steps fail, contact Red Hat Support.

Procedure

1. Log in to OpenShift Web Console.
2. Click Compute Nodes.
3. Identify the node that needs to be replaced. Take a note of its Machine Name.

4. Mark the node as unschedulable using the following command:

   $ oc adm cordon <node_name>

   Copy to Clipboard Toggle word wrap

5. Drain the node using the following command:

   $ oc adm drain <node_name> --force --delete-local-data --ignore-daemonsets

   Copy to Clipboard Toggle word wrap
   Important

   This activity may take at least 5-10 minutes. Ceph errors generated during this period are temporary and are automatically resolved when the new node is labeled and functional.

6. Click Compute Machines. Search for the required machine.
7. Besides the required machine, click the Action menu (⋮) Delete Machine.
8. Click Delete to confirm the machine deletion. A new machine is automatically created.

9. Wait for the new machine to start and transition into Running state.

   Important

   This activity may take at least 5-10 minutes.

10. Click Compute Nodes, confirm if the new node is in Ready state.

11. Apply the OpenShift Container Storage label to the new node using any one of the following:

    From User interface

    1. For the new node, click Action Menu (⋮) Edit Labels
    2. Add cluster.ocs.openshift.io/openshift-storage and click Save.

    From command line interface

    • Execute the following command to apply the OpenShift Container Storage label to the new node:

      $ oc label node <new_node_name> cluster.ocs.openshift.io/openshift-storage=""

      Copy to Clipboard Toggle word wrap

Verification steps

1. Execute the following command and verify that the new node is present in the output:

   $ oc get nodes --show-labels | grep cluster.ocs.openshift.io/openshift-storage= |cut -d' ' -f1

   Copy to Clipboard Toggle word wrap

2. Click Workloads Pods, confirm that at least the following pods on the new node are in Running state:

   • csi-cephfsplugin-*
   • csi-rbdplugin-*
3. Verify that all other required OpenShift Container Storage pods are in Running state.

4. Verify that new OSD pods are running on the replacement node.

   $ oc get pods -o wide -n openshift-storage| egrep -i new-node-name | egrep osd

   Copy to Clipboard Toggle word wrap

5. (Optional) If data encryption is enabled on the cluster, verify that the new OSD devices are encrypted.

   For each of the new nodes identified in previous step, do the following:

   1. Create a debug pod and open a chroot environment for the selected host(s).

      $ oc debug node/<node name>
      $ chroot /host

      Copy to Clipboard Toggle word wrap

   2. Run “lsblk” and check for the “crypt” keyword beside the ocs-deviceset name(s)

      $ lsblk

      Copy to Clipboard Toggle word wrap
6. If verification steps fail, contact Red Hat Support.

Procedure

1. Log in to OpenShift Web Console and click Compute Nodes.
2. Identify the faulty node and click on its Machine Name.
3. Click Actions Edit Annotations, and click Add More.
4. Add machine.openshift.io/exclude-node-draining and click Save.
5. Click Actions Delete Machine, and click Delete.

6. A new machine is automatically created, wait for new machine to start.

   Important

   This activity may take at least 5-10 minutes. Ceph errors generated during this period are temporary and are automatically resolved when the new node is labeled and functional.

7. Click Compute Nodes, confirm if the new node is in Ready state.

8. Apply the OpenShift Container Storage label to the new node using any one of the following:

   From the web user interface

   1. For the new node, click Action Menu (⋮) Edit Labels
   2. Add cluster.ocs.openshift.io/openshift-storage and click Save.

   From the command line interface

   • Execute the following command to apply the OpenShift Container Storage label to the new node:

     $ oc label node <new_node_name> cluster.ocs.openshift.io/openshift-storage=""

     Copy to Clipboard Toggle word wrap

9. Execute the following command and verify that the new node is present in the output:

   $ oc get nodes --show-labels | grep cluster.ocs.openshift.io/openshift-storage= | cut -d' ' -f1

   Copy to Clipboard Toggle word wrap

10. Click Workloads Pods, confirm that at least the following pods on the new node are in Running state:

    • csi-cephfsplugin-*
    • csi-rbdplugin-*
11. Verify that all other required OpenShift Container Storage pods are in Running state.

12. Verify that new OSD pods are running on the replacement node.

    $ oc get pods -o wide -n openshift-storage| egrep -i new-node-name | egrep osd

    Copy to Clipboard Toggle word wrap

13. (Optional) If data encryption is enabled on the cluster, verify that the new OSD devices are encrypted.

    For each of the new nodes identified in previous step, do the following:

    1. Create a debug pod and open a chroot environment for the selected host(s).

       $ oc debug node/<node name>
       $ chroot /host

       Copy to Clipboard Toggle word wrap

    2. Run “lsblk” and check for the “crypt” keyword beside the ocs-deviceset name(s)

       $ lsblk

       Copy to Clipboard Toggle word wrap
14. If verification steps fail, contact Red Hat Support.

Procedure

1. Identify the NODE and get labels on the node to be replaced.

   $ oc get nodes --show-labels | grep <node_name>

   Copy to Clipboard Toggle word wrap

2. Identify the mon (if any) and OSDs that are running in the node to be replaced.

   $ oc get pods -n openshift-storage -o wide | grep -i <node_name>

   Copy to Clipboard Toggle word wrap

3. Scale down the deployments of the pods identified in the previous step.

   For example:

   $ oc scale deployment rook-ceph-mon-c --replicas=0 -n openshift-storage
   $ oc scale deployment rook-ceph-osd-0 --replicas=0 -n openshift-storage
   $ oc scale deployment --selector=app=rook-ceph-crashcollector,node_name=<node_name>  --replicas=0 -n openshift-storage

   Copy to Clipboard Toggle word wrap

4. Mark the node as unschedulable.

   $ oc adm cordon <node_name>

   Copy to Clipboard Toggle word wrap

5. Drain the node.

   $ oc adm drain <node_name> --force --delete-local-data --ignore-daemonsets

   Copy to Clipboard Toggle word wrap

6. Delete the node.

   $ oc delete node <node_name>

   Copy to Clipboard Toggle word wrap
7. Log in to vSphere and terminate the identified VM.
8. Create a new VM on VMware with the required infrastructure. See Supported Infrastructure and Platforms.
9. Create a new OpenShift Container Platform worker node using the new VM.

10. Check for certificate signing requests (CSRs) related to OpenShift Container Platform that are in Pending state:

    $ oc get csr

    Copy to Clipboard Toggle word wrap

11. Approve all required OpenShift Container Platform CSRs for the new node:

    $ oc adm certificate approve <Certificate_Name>

    Copy to Clipboard Toggle word wrap
12. Click Compute Nodes in OpenShift Web Console, confirm if the new node is in Ready state.

13. Apply the OpenShift Container Storage label to the new node using any one of the following:

    From User interface

    1. For the new node, click Action Menu (⋮) Edit Labels.
    2. Add cluster.ocs.openshift.io/openshift-storage and click Save.

    From Command line interface

    • Execute the following command to apply the OpenShift Container Storage label to the new node:

      $ oc label node <new_node_name> cluster.ocs.openshift.io/openshift-storage=""

      Copy to Clipboard Toggle word wrap

14. Identify the namespace where OpenShift local storage operator is installed and assign it to local_storage_project variable:

    $ local_storage_project=$(oc get csv --all-namespaces | awk '{print $1}' | grep local)

    Copy to Clipboard Toggle word wrap

    For example:

    $ local_storage_project=$(oc get csv --all-namespaces | awk '{print $1}' | grep local)
    echo $local_storage_project
    openshift-local-storage

    Copy to Clipboard Toggle word wrap

15. Add a new worker node to localVolumeDiscovery and localVolumeSet.

    1. Update the localVolumeDiscovery definition to include the new node and remove the failed node.

       # oc edit -n $local_storage_project localvolumediscovery auto-discover-devices
       [...]
          nodeSelector:
           nodeSelectorTerms:
             - matchExpressions:
                 - key: kubernetes.io/hostname
                   operator: In
                   values:
                   - server1.example.com
                   - server2.example.com
                   #- server3.example.com
                   - newnode.example.com
       [...]

       Copy to Clipboard Toggle word wrap

       Remember to save before exiting the editor.

       In the above example, server3.example.com was removed and newnode.example.com is the new node.

    2. Determine which localVolumeSet to edit.

       # oc get -n $local_storage_project localvolumeset
       NAME          AGE
       localblock   25h

       Copy to Clipboard Toggle word wrap

    3. Update the localVolumeSet definition to include the new node and remove the failed node.

       # oc edit -n $local_storage_project localvolumeset localblock
       [...]
          nodeSelector:
           nodeSelectorTerms:
             - matchExpressions:
                 - key: kubernetes.io/hostname
                   operator: In
                   values:
                   - server1.example.com
                   - server2.example.com
                   #- server3.example.com
                   - newnode.example.com
       [...]

       Copy to Clipboard Toggle word wrap

       Remember to save before exiting the editor.

       In the above example, server3.example.com was removed and newnode.example.com is the new node.

16. Verify that the new localblock PV is available.

    $oc get pv | grep localblock | grep Available
    local-pv-551d950     512Gi    RWO    Delete  Available
    localblock     26s

    Copy to Clipboard Toggle word wrap

17. Change to the openshift-storage project.

    $ oc project openshift-storage

    Copy to Clipboard Toggle word wrap

18. Remove the failed OSD from the cluster. You can specify multiple failed OSDs if required.

    $ oc process -n openshift-storage ocs-osd-removal \
    -p FAILED_OSD_IDS=failed-osd-id1,failed-osd-id2 | oc create -f -

    Copy to Clipboard Toggle word wrap

19. Verify that the OSD was removed successfully by checking the status of the ocs-osd-removal-job pod.

    A status of Completed confirms that the OSD removal job succeeded.

    # oc get pod -l job-name=ocs-osd-removal-job -n openshift-storage

    Copy to Clipboard Toggle word wrap
    Note

    If ocs-osd-removal-job fails and the pod is not in the expected Completed state, check the pod logs for further debugging. For example:

    # oc logs -l job-name=ocs-osd-removal-job -n openshift-storage

    Copy to Clipboard Toggle word wrap

20. Delete the ocs-osd-removal-job.

    # oc delete -n openshift-storage job ocs-osd-removal-job

    Copy to Clipboard Toggle word wrap

    Example output:

    job.batch "ocs-osd-removal-job" deleted

    Copy to Clipboard Toggle word wrap

Verification steps

1. Execute the following command and verify that the new node is present in the output:

   $ oc get nodes --show-labels | grep cluster.ocs.openshift.io/openshift-storage= |cut -d' ' -f1

   Copy to Clipboard Toggle word wrap

2. Click Workloads Pods, confirm that at least the following pods on the new node are in Running state:

   • csi-cephfsplugin-*
   • csi-rbdplugin-*

3. Verify that all other required OpenShift Container Storage pods are in Running state.

   Ensure that the new incremental mon is created and is in the Running state.

   $ oc get pod -n openshift-storage | grep mon

   Copy to Clipboard Toggle word wrap

   Example output:

   rook-ceph-mon-a-cd575c89b-b6k66         2/2     Running
   0          38m
   rook-ceph-mon-b-6776bc469b-tzzt8        2/2     Running
   0          38m
   rook-ceph-mon-d-5ff5d488b5-7v8xh        2/2     Running
   0          4m8s

   Copy to Clipboard Toggle word wrap

   OSD and Mon might take several minutes to get to the Running state.

4. Verify that new OSD pods are running on the replacement node.

   $ oc get pods -o wide -n openshift-storage| egrep -i new-node-name | egrep osd

   Copy to Clipboard Toggle word wrap

5. (Optional) If cluster-wide encryption is enabled on the cluster, verify that the new OSD devices are encrypted.

   For each of the new nodes identified in previous step, do the following:

   1. Create a debug pod and open a chroot environment for the selected host(s).

      $ oc debug node/<node name>
      $ chroot /host

      Copy to Clipboard Toggle word wrap

   2. Run “lsblk” and check for the “crypt” keyword beside the ocs-deviceset name(s)

      $ lsblk

      Copy to Clipboard Toggle word wrap
6. If verification steps fail, contact Red Hat Support.

Procedure

1. Log in to OpenShift Web Console and click Compute Nodes.
2. Identify the node that needs to be replaced. Take a note of its Machine Name.

3. Get labels on the node to be replaced.

   $ oc get nodes --show-labels | grep <node_name>

   Copy to Clipboard Toggle word wrap

4. Identify the mon (if any) and OSDs that are running in the node to be replaced.

   $ oc get pods -n openshift-storage -o wide | grep -i <node_name>

   Copy to Clipboard Toggle word wrap

5. Scale down the deployments of the pods identified in the previous step.

   For example:

   $ oc scale deployment rook-ceph-mon-c --replicas=0 -n openshift-storage
   $ oc scale deployment rook-ceph-osd-0 --replicas=0 -n openshift-storage
   $ oc scale deployment --selector=app=rook-ceph-crashcollector,node_name=<node_name>  --replicas=0 -n openshift-storage

   Copy to Clipboard Toggle word wrap

6. Mark the node as unschedulable.

   $ oc adm cordon <node_name>

   Copy to Clipboard Toggle word wrap

7. Drain the node.

   $ oc adm drain <node_name> --force --delete-local-data --ignore-daemonsets

   Copy to Clipboard Toggle word wrap
8. Click Compute Machines. Search for the required machine.
9. Besides the required machine, click the Action menu (⋮) Delete Machine.
10. Click Delete to confirm the machine deletion. A new machine is automatically created.

11. Wait for the new machine to start and transition into Running state.

    Important

    This activity may take at least 5-10 minutes or more.

12. Click Compute Nodes in OpenShift Web Console, confirm if the new node is in Ready state.
13. Physically add a new device to the node.

14. Apply the OpenShift Container Storage label to the new node using any one of the following:

    From User interface

    1. For the new node, click Action Menu (⋮) Edit Labels.
    2. Add cluster.ocs.openshift.io/openshift-storage and click Save.

    From Command line interface

    • Execute the following command to apply the OpenShift Container Storage label to the new node:

      $ oc label node <new_node_name> cluster.ocs.openshift.io/openshift-storage=""

      Copy to Clipboard Toggle word wrap

15. Identify the namespace where OpenShift local storage operator is installed and assign it to local_storage_project variable:

    $ local_storage_project=$(oc get csv --all-namespaces | awk '{print $1}' | grep local)

    Copy to Clipboard Toggle word wrap

    For example:

    $ local_storage_project=$(oc get csv --all-namespaces | awk '{print $1}' | grep local)
    echo $local_storage_project
    openshift-local-storage

    Copy to Clipboard Toggle word wrap

16. Add a new worker node to localVolumeDiscovery and localVolumeSet.

    1. Update the localVolumeDiscovery definition to include the new node and remove the failed node.

       # oc edit -n $local_storage_project localvolumediscovery auto-discover-devices
       [...]
          nodeSelector:
           nodeSelectorTerms:
             - matchExpressions:
                 - key: kubernetes.io/hostname
                   operator: In
                   values:
                   - server1.example.com
                   - server2.example.com
                   #- server3.example.com
                   - newnode.example.com
       [...]

       Copy to Clipboard Toggle word wrap

       Remember to save before exiting the editor.

       In the above example, server3.example.com was removed and newnode.example.com is the new node.

    2. Determine which localVolumeSet to edit.

       # oc get -n $local_storage_project localvolumeset
       NAME          AGE
       localblock   25h

       Copy to Clipboard Toggle word wrap

    3. Update the localVolumeSet definition to include the new node and remove the failed node.

       # oc edit -n $local_storage_project localvolumeset localblock
       [...]
          nodeSelector:
           nodeSelectorTerms:
             - matchExpressions:
                 - key: kubernetes.io/hostname
                   operator: In
                   values:
                   - server1.example.com
                   - server2.example.com
                   #- server3.example.com
                   - newnode.example.com
       [...]

       Copy to Clipboard Toggle word wrap

       Remember to save before exiting the editor.

       In the above example, server3.example.com was removed and newnode.example.com is the new node.

17. Verify that the new localblock PV is available.

    $oc get pv | grep localblock | grep Available
    local-pv-551d950     512Gi    RWO    Delete  Available
    localblock     26s

    Copy to Clipboard Toggle word wrap

18. Change to the openshift-storage project.

    $ oc project openshift-storage

    Copy to Clipboard Toggle word wrap

19. Remove the failed OSD from the cluster. You can specify multiple failed OSDs if required.

    $ oc process -n openshift-storage ocs-osd-removal \
    -p FAILED_OSD_IDS=failed-osd-id1,failed-osd-id2 | oc create -f -

    Copy to Clipboard Toggle word wrap

20. Verify that the OSD was removed successfully by checking the status of the ocs-osd-removal-job pod.

    A status of Completed confirms that the OSD removal job succeeded.

    # oc get pod -l job-name=ocs-osd-removal-job -n openshift-storage

    Copy to Clipboard Toggle word wrap
    Note

    If ocs-osd-removal-job fails and the pod is not in the expected Completed state, check the pod logs for further debugging. For example:

    # oc logs -l job-name=ocs-osd-removal-job -n openshift-storage

    Copy to Clipboard Toggle word wrap

21. Identify the PV associated with the PVC.

    #oc get pv -L kubernetes.io/hostname | grep localblock | grep Released
    local-pv-d6bf175b  1490Gi  RWO  Delete  Released  openshift-storage/ocs-deviceset-0-data-0-6c5pw  localblock  2d22h  compute-1

    Copy to Clipboard Toggle word wrap

    If there is a PV in Released state, delete it.

    # oc delete pv <persistent-volume>

    Copy to Clipboard Toggle word wrap

    For example:

    #oc delete pv local-pv-d6bf175b
    persistentvolume "local-pv-d9c5cbd6" deleted

    Copy to Clipboard Toggle word wrap

22. Identify the crashcollector pod deployment.

    $ oc get deployment --selector=app=rook-ceph-crashcollector,node_name=failed-node-name -n openshift-storage

    Copy to Clipboard Toggle word wrap

    If there is an existing crashcollector pod deployment, delete it.

    $ oc delete deployment --selector=app=rook-ceph-crashcollector,node_name=failed-node-name -n openshift-storage

    Copy to Clipboard Toggle word wrap

23. Delete the ocs-osd-removal-job.

    # oc delete -n openshift-storage job ocs-osd-removal-job

    Copy to Clipboard Toggle word wrap

    Example output:

    job.batch "ocs-osd-removal-job" deleted

    Copy to Clipboard Toggle word wrap

Verification steps

1. Execute the following command and verify that the new node is present in the output:

   $ oc get nodes --show-labels | grep cluster.ocs.openshift.io/openshift-storage= |cut -d' ' -f1

   Copy to Clipboard Toggle word wrap

2. Click Workloads Pods, confirm that at least the following pods on the new node are in Running state:

   • csi-cephfsplugin-*
   • csi-rbdplugin-*

3. Verify that all other required OpenShift Container Storage pods are in Running state.

   Ensure that the new incremental mon is created and is in the Running state.

   $ oc get pod -n openshift-storage | grep mon

   Copy to Clipboard Toggle word wrap

   Example output:

   rook-ceph-mon-a-cd575c89b-b6k66         2/2     Running
   0          38m
   rook-ceph-mon-b-6776bc469b-tzzt8        2/2     Running
   0          38m
   rook-ceph-mon-d-5ff5d488b5-7v8xh        2/2     Running
   0          4m8s

   Copy to Clipboard Toggle word wrap

   OSD and Mon might take several minutes to get to the Running state.

4. Verify that new OSD pods are running on the replacement node.

   $ oc get pods -o wide -n openshift-storage| egrep -i new-node-name | egrep osd

   Copy to Clipboard Toggle word wrap

5. (Optional) If cluster-wide encryption is enabled on the cluster, verify that the new OSD devices are encrypted.

   For each of the new nodes identified in previous step, do the following:

   1. Create a debug pod and open a chroot environment for the selected host(s).

      $ oc debug node/<node name>
      $ chroot /host

      Copy to Clipboard Toggle word wrap

   2. Run “lsblk” and check for the “crypt” keyword beside the ocs-deviceset name(s)

      $ lsblk

      Copy to Clipboard Toggle word wrap
6. If verification steps fail, contact Red Hat Support.

Procedure

1. Identify the NODE and get labels on the node to be replaced.

   $ oc get nodes --show-labels | grep <node_name>

   Copy to Clipboard Toggle word wrap

2. Identify the mon (if any) and OSDs that are running in the node to be replaced.

   $ oc get pods -n openshift-storage -o wide | grep -i <node_name>

   Copy to Clipboard Toggle word wrap

3. Scale down the deployments of the pods identified in the previous step.

   For example:

   $ oc scale deployment rook-ceph-mon-c --replicas=0 -n openshift-storage
   $ oc scale deployment rook-ceph-osd-0 --replicas=0 -n openshift-storage
   $ oc scale deployment --selector=app=rook-ceph-crashcollector,node_name=<node_name>  --replicas=0 -n openshift-storage

   Copy to Clipboard Toggle word wrap

4. Mark the node as unschedulable.

   $ oc adm cordon <node_name>

   Copy to Clipboard Toggle word wrap

5. Remove the pods which are in Terminating state.

   $ oc get pods -A -o wide | grep -i <node_name> |  awk '{if ($4 == "Terminating") system ("oc -n " $1 " delete pods " $2  " --grace-period=0 " " --force ")}'

   Copy to Clipboard Toggle word wrap

6. Drain the node.

   $ oc adm drain <node_name> --force --delete-local-data --ignore-daemonsets

   Copy to Clipboard Toggle word wrap

7. Delete the node.

   $ oc delete node <node_name>

   Copy to Clipboard Toggle word wrap
8. Log in to vSphere and terminate the identified VM.
9. Create a new VM on VMware with the required infrastructure. See Supported Infrastructure and Platforms.
10. Create a new OpenShift Container Platform worker node using the new VM.

11. Check for certificate signing requests (CSRs) related to OpenShift Container Platform that are in Pending state:

    $ oc get csr

    Copy to Clipboard Toggle word wrap

12. Approve all required OpenShift Container Platform CSRs for the new node:

    $ oc adm certificate approve <Certificate_Name>

    Copy to Clipboard Toggle word wrap
13. Click Compute Nodes in OpenShift Web Console, confirm if the new node is in Ready state.

14. Apply the OpenShift Container Storage label to the new node using any one of the following:

    From User interface

    1. For the new node, click Action Menu (⋮) Edit Labels.
    2. Add cluster.ocs.openshift.io/openshift-storage and click Save.

    From Command line interface

    • Execute the following command to apply the OpenShift Container Storage label to the new node:

      $ oc label node <new_node_name> cluster.ocs.openshift.io/openshift-storage=""

      Copy to Clipboard Toggle word wrap

15. Identify the namespace where OpenShift local storage operator is installed and assign it to local_storage_project variable:

    $ local_storage_project=$(oc get csv --all-namespaces | awk '{print $1}' | grep local)

    Copy to Clipboard Toggle word wrap

    For example:

    $ local_storage_project=$(oc get csv --all-namespaces | awk '{print $1}' | grep local)
    echo $local_storage_project
    openshift-local-storage

    Copy to Clipboard Toggle word wrap

16. Add a new worker node to localVolumeDiscovery and localVolumeSet.

    1. Update the localVolumeDiscovery definition to include the new node and remove the failed node.

       # oc edit -n $local_storage_project localvolumediscovery auto-discover-devices
       [...]
          nodeSelector:
           nodeSelectorTerms:
             - matchExpressions:
                 - key: kubernetes.io/hostname
                   operator: In
                   values:
                   - server1.example.com
                   - server2.example.com
                   #- server3.example.com
                   - newnode.example.com
       [...]

       Copy to Clipboard Toggle word wrap

       Remember to save before exiting the editor.

       In the above example, server3.example.com was removed and newnode.example.com is the new node.

    2. Determine which localVolumeSet to edit.

       # oc get -n $local_storage_project localvolumeset
       NAME          AGE
       localblock   25h

       Copy to Clipboard Toggle word wrap

    3. Update the localVolumeSet definition to include the new node and remove the failed node.

       # oc edit -n $local_storage_project localvolumeset localblock
       [...]
          nodeSelector:
           nodeSelectorTerms:
             - matchExpressions:
                 - key: kubernetes.io/hostname
                   operator: In
                   values:
                   - server1.example.com
                   - server2.example.com
                   #- server3.example.com
                   - newnode.example.com
       [...]

       Copy to Clipboard Toggle word wrap

       Remember to save before exiting the editor.

       In the above example, server3.example.com was removed and newnode.example.com is the new node.

17. Verify that the new localblock PV is available.

    $oc get pv | grep localblock | grep Available
    local-pv-551d950     512Gi    RWO    Delete  Available
    localblock     26s

    Copy to Clipboard Toggle word wrap

18. Change to the openshift-storage project.

    $ oc project openshift-storage

    Copy to Clipboard Toggle word wrap

19. Remove the failed OSD from the cluster. You can specify multiple failed OSDs if required.

    $ oc process -n openshift-storage ocs-osd-removal \
    -p FAILED_OSD_IDS=failed-osd-id1,failed-osd-id2 | oc create -f -

    Copy to Clipboard Toggle word wrap

20. Verify that the OSD was removed successfully by checking the status of the ocs-osd-removal-job pod.

    A status of Completed confirms that the OSD removal job succeeded.

    # oc get pod -l job-name=ocs-osd-removal-job -n openshift-storage

    Copy to Clipboard Toggle word wrap
    Note

    If ocs-osd-removal-job fails and the pod is not in the expected Completed state, check the pod logs for further debugging. For example:

    # oc logs -l job-name=ocs-osd-removal-job -n openshift-storage

    Copy to Clipboard Toggle word wrap

21. Delete the ocs-osd-removal-job.

    # oc delete -n openshift-storage job ocs-osd-removal-job

    Copy to Clipboard Toggle word wrap

    Example output:

    job.batch "ocs-osd-removal-job" deleted

    Copy to Clipboard Toggle word wrap

Verification steps

1. Execute the following command and verify that the new node is present in the output:

   $ oc get nodes --show-labels | grep cluster.ocs.openshift.io/openshift-storage= |cut -d' ' -f1

   Copy to Clipboard Toggle word wrap

2. Click Workloads Pods, confirm that at least the following pods on the new node are in Running state:

   • csi-cephfsplugin-*
   • csi-rbdplugin-*

3. Verify that all other required OpenShift Container Storage pods are in Running state.

   Ensure that the new incremental mon is created and is in the Running state.

   $ oc get pod -n openshift-storage | grep mon

   Copy to Clipboard Toggle word wrap

   Example output:

   rook-ceph-mon-a-cd575c89b-b6k66         2/2     Running
   0          38m
   rook-ceph-mon-b-6776bc469b-tzzt8        2/2     Running
   0          38m
   rook-ceph-mon-d-5ff5d488b5-7v8xh        2/2     Running
   0          4m8s

   Copy to Clipboard Toggle word wrap

   OSD and Mon might take several minutes to get to the Running state.

4. Verify that new OSD pods are running on the replacement node.

   $ oc get pods -o wide -n openshift-storage| egrep -i new-node-name | egrep osd

   Copy to Clipboard Toggle word wrap

5. (Optional) If cluster-wide encryption is enabled on the cluster, verify that the new OSD devices are encrypted.

   For each of the new nodes identified in previous step, do the following:

   1. Create a debug pod and open a chroot environment for the selected host(s).

      $ oc debug node/<node name>
      $ chroot /host

      Copy to Clipboard Toggle word wrap

   2. Run “lsblk” and check for the “crypt” keyword beside the ocs-deviceset name(s)

      $ lsblk

      Copy to Clipboard Toggle word wrap
6. If verification steps fail, contact Red Hat Support.

Procedure

1. Log in to OpenShift Web Console and click Compute Nodes.
2. Identify the node that needs to be replaced. Take a note of its Machine Name.

3. Get labels on the node to be replaced.

   $ oc get nodes --show-labels | grep <node_name>

   Copy to Clipboard Toggle word wrap

4. Identify the mon (if any) and OSDs that are running in the node to be replaced.

   $ oc get pods -n openshift-storage -o wide | grep -i <node_name>

   Copy to Clipboard Toggle word wrap

5. Scale down the deployments of the pods identified in the previous step.

   For example:

   $ oc scale deployment rook-ceph-mon-c --replicas=0 -n openshift-storage
   $ oc scale deployment rook-ceph-osd-0 --replicas=0 -n openshift-storage
   $ oc scale deployment --selector=app=rook-ceph-crashcollector,node_name=<node_name>  --replicas=0 -n openshift-storage

   Copy to Clipboard Toggle word wrap

6. Mark the node as unschedulable.

   $ oc adm cordon <node_name>

   Copy to Clipboard Toggle word wrap

7. Remove the pods which are in Terminating state.

   $ oc get pods -A -o wide | grep -i <node_name> |  awk '{if ($4 == "Terminating") system ("oc -n " $1 " delete pods " $2  " --grace-period=0 " " --force ")}'

   Copy to Clipboard Toggle word wrap

8. Drain the node.

   $ oc adm drain <node_name> --force --delete-local-data --ignore-daemonsets

   Copy to Clipboard Toggle word wrap
9. Click Compute Machines. Search for the required machine.
10. Besides the required machine, click the Action menu (⋮) Delete Machine.
11. Click Delete to confirm the machine deletion. A new machine is automatically created.

12. Wait for the new machine to start and transition into Running state.

    Important

    This activity may take at least 5-10 minutes or more.

13. Click Compute Nodes in OpenShift Web Console, confirm if the new node is in Ready state.
14. Physically add a new device to the node.

15. Apply the OpenShift Container Storage label to the new node using any one of the following:

    From User interface

    1. For the new node, click Action Menu (⋮) Edit Labels.
    2. Add cluster.ocs.openshift.io/openshift-storage and click Save.

    From Command line interface

    • Execute the following command to apply the OpenShift Container Storage label to the new node:

      $ oc label node <new_node_name> cluster.ocs.openshift.io/openshift-storage=""

      Copy to Clipboard Toggle word wrap

16. Identify the namespace where OpenShift local storage operator is installed and assign it to local_storage_project variable:

    $ local_storage_project=$(oc get csv --all-namespaces | awk '{print $1}' | grep local)

    Copy to Clipboard Toggle word wrap

    For example:

    $ local_storage_project=$(oc get csv --all-namespaces | awk '{print $1}' | grep local)
    echo $local_storage_project
    openshift-local-storage

    Copy to Clipboard Toggle word wrap

17. Add a new worker node to localVolumeDiscovery and localVolumeSet.

    1. Update the localVolumeDiscovery definition to include the new node and remove the failed node.

       # oc edit -n $local_storage_project localvolumediscovery auto-discover-devices
       [...]
          nodeSelector:
           nodeSelectorTerms:
             - matchExpressions:
                 - key: kubernetes.io/hostname
                   operator: In
                   values:
                   - server1.example.com
                   - server2.example.com
                   #- server3.example.com
                   - newnode.example.com
       [...]

       Copy to Clipboard Toggle word wrap

       Remember to save before exiting the editor.

       In the above example, server3.example.com was removed and newnode.example.com is the new node.

    2. Determine which localVolumeSet to edit.

       # oc get -n $local_storage_project localvolumeset
       NAME          AGE
       localblock   25h

       Copy to Clipboard Toggle word wrap

    3. Update the localVolumeSet definition to include the new node and remove the failed node.

       # oc edit -n $local_storage_project localvolumeset localblock
       [...]
          nodeSelector:
           nodeSelectorTerms:
             - matchExpressions:
                 - key: kubernetes.io/hostname
                   operator: In
                   values:
                   - server1.example.com
                   - server2.example.com
                   #- server3.example.com
                   - newnode.example.com
       [...]

       Copy to Clipboard Toggle word wrap

       Remember to save before exiting the editor.

       In the above example, server3.example.com was removed and newnode.example.com is the new node.

18. Verify that the new localblock PV is available.

    $oc get pv | grep localblock | grep Available
    local-pv-551d950     512Gi    RWO    Delete  Available
    localblock     26s

    Copy to Clipboard Toggle word wrap

19. Change to the openshift-storage project.

    $ oc project openshift-storage

    Copy to Clipboard Toggle word wrap

20. Remove the failed OSD from the cluster. You can specify multiple failed OSDs if required.

    $ oc process -n openshift-storage ocs-osd-removal \
    -p FAILED_OSD_IDS=failed-osd-id1,failed-osd-id2 | oc create -f -

    Copy to Clipboard Toggle word wrap

21. Verify that the OSD was removed successfully by checking the status of the ocs-osd-removal-job pod.

    A status of Completed confirms that the OSD removal job succeeded.

    # oc get pod -l job-name=ocs-osd-removal-job -n openshift-storage

    Copy to Clipboard Toggle word wrap
    Note

    If ocs-osd-removal-job fails and the pod is not in the expected Completed state, check the pod logs for further debugging. For example:

    # oc logs -l job-name=ocs-osd-removal-job -n openshift-storage

    Copy to Clipboard Toggle word wrap

22. Identify the PV associated with the PVC.

    #oc get pv -L kubernetes.io/hostname | grep localblock | grep Released
    local-pv-d6bf175b  1490Gi  RWO  Delete  Released  openshift-storage/ocs-deviceset-0-data-0-6c5pw  localblock  2d22h  compute-1

    Copy to Clipboard Toggle word wrap

    If there is a PV in Released state, delete it.

    # oc delete pv <persistent-volume>

    Copy to Clipboard Toggle word wrap

    For example:

    #oc delete pv local-pv-d6bf175b
    persistentvolume "local-pv-d9c5cbd6" deleted

    Copy to Clipboard Toggle word wrap

23. Identify the crashcollector pod deployment.

    $ oc get deployment --selector=app=rook-ceph-crashcollector,node_name=failed-node-name -n openshift-storage

    Copy to Clipboard Toggle word wrap

    If there is an existing crashcollector pod deployment, delete it.

    $ oc delete deployment --selector=app=rook-ceph-crashcollector,node_name=failed-node-name -n openshift-storage

    Copy to Clipboard Toggle word wrap

24. Delete the ocs-osd-removal-job.

    # oc delete -n openshift-storage job ocs-osd-removal-job

    Copy to Clipboard Toggle word wrap

    Example output:

    job.batch "ocs-osd-removal-job" deleted

    Copy to Clipboard Toggle word wrap

Verification steps

1. Execute the following command and verify that the new node is present in the output:

   $ oc get nodes --show-labels | grep cluster.ocs.openshift.io/openshift-storage= |cut -d' ' -f1

   Copy to Clipboard Toggle word wrap

2. Click Workloads Pods, confirm that at least the following pods on the new node are in Running state:

   • csi-cephfsplugin-*
   • csi-rbdplugin-*

3. Verify that all other required OpenShift Container Storage pods are in Running state.

   Ensure that the new incremental mon is created and is in the Running state.

   $ oc get pod -n openshift-storage | grep mon

   Copy to Clipboard Toggle word wrap

   Example output:

   rook-ceph-mon-a-cd575c89b-b6k66         2/2     Running
   0          38m
   rook-ceph-mon-b-6776bc469b-tzzt8        2/2     Running
   0          38m
   rook-ceph-mon-d-5ff5d488b5-7v8xh        2/2     Running
   0          4m8s

   Copy to Clipboard Toggle word wrap

   OSD and Mon might take several minutes to get to the Running state.

4. Verify that new OSD pods are running on the replacement node.

   $ oc get pods -o wide -n openshift-storage| egrep -i new-node-name | egrep osd

   Copy to Clipboard Toggle word wrap

5. (Optional) If cluster-wide encryption is enabled on the cluster, verify that the new OSD devices are encrypted.

   For each of the new nodes identified in previous step, do the following:

   1. Create a debug pod and open a chroot environment for the selected host(s).

      $ oc debug node/<node name>
      $ chroot /host

      Copy to Clipboard Toggle word wrap

   2. Run “lsblk” and check for the “crypt” keyword beside the ocs-deviceset name(s)

      $ lsblk

      Copy to Clipboard Toggle word wrap
6. If verification steps fail, contact Red Hat Support.

Procedure

1. Log in to OpenShift Web Console and click Compute Nodes.
2. Identify the node that needs to be replaced. Take a note of its Machine Name.

3. Get labels on the node to be replaced.

   $ oc get nodes --show-labels | grep <node_name>

   Copy to Clipboard Toggle word wrap

4. Identify the mon (if any) and OSDs that are running in the node to be replaced.

   $ oc get pods -n openshift-storage -o wide | grep -i <node_name>

   Copy to Clipboard Toggle word wrap

5. Scale down the deployments of the pods identified in the previous step.

   For example:

   $ oc scale deployment rook-ceph-mon-c --replicas=0 -n openshift-storage
   $ oc scale deployment rook-ceph-osd-0 --replicas=0 -n openshift-storage
   $ oc scale deployment --selector=app=rook-ceph-crashcollector,node_name=<node_name>  --replicas=0 -n openshift-storage

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6. Mark the nodes as unschedulable.

   $ oc adm cordon <node_name>

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7. Drain the node.

   $ oc adm drain <node_name> --force --delete-local-data --ignore-daemonsets

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8. Click Compute Machines. Search for the required machine.
9. Besides the required machine, click the Action menu (⋮) Delete Machine.

10. Click Delete to confirm the machine deletion. A new machine is automatically created. Wait for the new machine to start and transition into Running state.

    Important

    This activity may take at least 5-10 minutes or more.

11. Click Compute Nodes in the OpenShift web console. Confirm if the new node is in Ready state.
12. Physically add the new device(s) to the node.

13. Apply the OpenShift Container Storage label to the new node using any one of the following:

    From User interface

    1. For the new node, click Action Menu (⋮) Edit Labels.
    2. Add cluster.ocs.openshift.io/openshift-storage and click Save.

    From Command line interface

    • Execute the following command to apply the OpenShift Container Storage label to the new node:

    $ oc label node <new_node_name> cluster.ocs.openshift.io/openshift-storage=""

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14. Identify the namespace where OpenShift local storage operator is installed and assign it to local_storage_project variable:

    $ local_storage_project=$(oc get csv --all-namespaces | awk '{print $1}' | grep local)

    Copy to Clipboard Toggle word wrap

    For example:

    $ local_storage_project=$(oc get csv --all-namespaces | awk '{print $1}' | grep local)
    echo $local_storage_project
    openshift-local-storage

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15. Add a new worker node to localVolumeDiscovery and localVolumeSet.

    1. Update the localVolumeDiscovery definition to include the new node and remove the failed node.

       # oc edit -n $local_storage_project localvolumediscovery auto-discover-devices
       [...]
          nodeSelector:
           nodeSelectorTerms:
             - matchExpressions:
                 - key: kubernetes.io/hostname
                   operator: In
                   values:
                   - server1.example.com
                   - server2.example.com
                   #- server3.example.com
                   - newnode.example.com
       [...]

       Copy to Clipboard Toggle word wrap

       Remember to save before exiting the editor.

       In the above example, server3.example.com was removed and newnode.example.com is the new node.

    2. Determine which localVolumeSet to edit.

       # oc get -n $local_storage_project localvolumeset
       NAME          AGE
       localblock   25h

       Copy to Clipboard Toggle word wrap

    3. Update the localVolumeSet definition to include the new node and remove the failed node.

       # oc edit -n $local_storage_project localvolumeset localblock
       [...]
          nodeSelector:
           nodeSelectorTerms:
             - matchExpressions:
                 - key: kubernetes.io/hostname
                   operator: In
                   values:
                   - server1.example.com
                   - server2.example.com
                   #- server3.example.com
                   - newnode.example.com
       [...]

       Copy to Clipboard Toggle word wrap

       Remember to save before exiting the editor.

       In the above example, server3.example.com was removed and newnode.example.com is the new node.

16. Verify that the new localblock PV is available.

    $oc get pv | grep localblock | grep Available
    local-pv-551d950     512Gi    RWO    Delete  Available
    localblock     26s

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17. Change to the openshift-storage project.

    $ oc project openshift-storage

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18. Remove the failed OSD from the cluster. You can specify multiple failed OSDs if required.

    $ oc process -n openshift-storage ocs-osd-removal \
    -p FAILED_OSD_IDS=failed-osd-id1,failed-osd-id2 | oc create -f -

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19. Verify that the OSD was removed successfully by checking the status of the ocs-osd-removal-job pod.

    A status of Completed confirms that the OSD removal job succeeded.

    # oc get pod -l job-name=ocs-osd-removal-job -n openshift-storage

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    Note

    If ocs-osd-removal-job fails and the pod is not in the expected Completed state, check the pod logs for further debugging. For example:

    # oc logs -l job-name=ocs-osd-removal-job -n openshift-storage

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20. Identify the PV associated with the PVC.

    # oc get pv -L kubernetes.io/hostname | grep localblock | grep Released
    local-pv-d6bf175b  512Gi  RWO  Delete  Released  openshift-storage/ocs-deviceset-0-data-0-6c5pw  localblock  2d22h  server3.example.com

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    If there is a PV in Released state, delete it.

    # oc delete pv <persistent-volume>

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    For example:

    # oc delete pv local-pv-d6bf175b
    persistentvolume "local-pv-d6bf175b" deleted

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21. Identify the crashcollector pod deployment.

    $ oc get deployment --selector=app=rook-ceph-crashcollector,node_name=failed-node-name -n openshift-storage

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    If there is an existing crashcollector pod, delete it.

    $ oc delete deployment --selector=app=rook-ceph-crashcollector,node_name=failed-node-name -n openshift-storage

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22. Delete the ocs-osd-removal job.

    # oc delete -n openshift-storage job ocs-osd-removal-job

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    Example output:

    job.batch "ocs-osd-removal-job" deleted

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Verification steps

1. Execute the following command and verify that the new node is present in the output:

   $ oc get nodes --show-labels | grep cluster.ocs.openshift.io/openshift-storage= |cut -d' ' -f1

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2. Click Workloads Pods, confirm that at least the following pods on the new node are in Running state:

   • csi-cephfsplugin-*
   • csi-rbdplugin-*

3. Verify that all other required OpenShift Container Storage pods are in Running state.

   Ensure that the new incremental mon is created and is in the Running state.

   $ oc get pod -n openshift-storage | grep mon

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   Example output:

   rook-ceph-mon-a-cd575c89b-b6k66         2/2     Running  0  38m
   rook-ceph-mon-b-6776bc469b-tzzt8        2/2     Running  0  38m
   rook-ceph-mon-d-5ff5d488b5-7v8xh        2/2     Running  0  4m8s

   Copy to Clipboard Toggle word wrap

   OSD and Mon might take several minutes to get to the Running state.

4. Verify that new OSD pods are running on the replacement node.

   $ oc get pods -o wide -n openshift-storage| egrep -i new-node-name | egrep osd

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5. (Optional) If cluster-wide encryption is enabled on the cluster, verify that the new OSD devices are encrypted.

   For each of the new nodes identified in previous step, do the following:

   1. Create a debug pod and open a chroot environment for the selected host(s).

      $ oc debug node/<node name>
      $ chroot /host

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   2. Run “lsblk” and check for the “crypt” keyword beside the ocs-deviceset name(s)

      $ lsblk

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6. If verification steps fail, contact Red Hat Support.

Procedure

1. Log in to OpenShift Web Console and click Compute Nodes.
2. Identify the node that needs to be replaced. Take a note of its Machine Name.

3. Get the labels on the node to be replaced.

   $ oc get nodes --show-labels | grep <node_name>

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4. Identify the mon (if any) and OSDs that are running in the node to be replaced.

   $ oc get pods -n openshift-storage -o wide | grep -i <node_name>

   Copy to Clipboard Toggle word wrap

5. Scale down the deployments of the pods identified in the previous step.

   For example:

   $ oc scale deployment rook-ceph-mon-c --replicas=0 -n openshift-storage
   $ oc scale deployment rook-ceph-osd-0 --replicas=0 -n openshift-storage
   $ oc scale deployment --selector=app=rook-ceph-crashcollector,node_name=<node_name>  --replicas=0 -n openshift-storage

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6. Mark the node as unschedulable.

   $ oc adm cordon <node_name>

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7. Remove the pods which are in the Terminating state.

   $ oc get pods -A -o wide | grep -i <node_name> |  awk '{if ($4 == "Terminating") system ("oc -n " $1 " delete pods " $2  " --grace-period=0 " " --force ")}'

   Copy to Clipboard Toggle word wrap

8. Drain the node.

   $ oc adm drain <node_name> --force --delete-local-data --ignore-daemonsets

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9. Click Compute Machines. Search for the required machine.
10. Besides the required machine, click the Action menu (⋮) Delete Machine.

11. Click Delete to confirm the machine deletion. A new machine is automatically created. Wait for the new machine to start and transition into Running state.

    Important

    This activity may take at least 5-10 minutes or more.

12. Click Compute Nodes in the OpenShift web console. Confirm if the new node is in Ready state.
13. Physically add the new device(s) to the node.

14. Apply the OpenShift Container Storage label to the new node using any one of the following:

    From User interface

    1. For the new node, click Action Menu (⋮) Edit Labels.
    2. Add cluster.ocs.openshift.io/openshift-storage and click Save.

    From Command line interface

    • Execute the following command to apply the OpenShift Container Storage label to the new node:

    $ oc label node <new_node_name> cluster.ocs.openshift.io/openshift-storage=""

    Copy to Clipboard Toggle word wrap

15. Identify the namespace where OpenShift local storage operator is installed and assign it to local_storage_project variable:

    $ local_storage_project=$(oc get csv --all-namespaces | awk '{print $1}' | grep local)

    Copy to Clipboard Toggle word wrap

    For example:

    $ local_storage_project=$(oc get csv --all-namespaces | awk '{print $1}' | grep local)
    echo $local_storage_project
    openshift-local-storage

    Copy to Clipboard Toggle word wrap

16. Add a new worker node to localVolumeDiscovery and localVolumeSet.

    1. Update the localVolumeDiscovery definition to include the new node and remove the failed node.

       # oc edit -n $local_storage_project localvolumediscovery auto-discover-devices
       [...]
          nodeSelector:
           nodeSelectorTerms:
             - matchExpressions:
                 - key: kubernetes.io/hostname
                   operator: In
                   values:
                   - server1.example.com
                   - server2.example.com
                   #- server3.example.com
                   - newnode.example.com
       [...]

       Copy to Clipboard Toggle word wrap

       Remember to save before exiting the editor.

       In the above example, server3.example.com was removed and newnode.example.com is the new node.

    2. Determine which localVolumeSet to edit.

       # oc get -n $local_storage_project localvolumeset
       NAME          AGE
       localblock   25h

       Copy to Clipboard Toggle word wrap

    3. Update the localVolumeSet definition to include the new node and remove the failed node.

       # oc edit -n $local_storage_project localvolumeset localblock
       [...]
          nodeSelector:
           nodeSelectorTerms:
             - matchExpressions:
                 - key: kubernetes.io/hostname
                   operator: In
                   values:
                   - server1.example.com
                   - server2.example.com
                   #- server3.example.com
                   - newnode.example.com
       [...]

       Copy to Clipboard Toggle word wrap

       Remember to save before exiting the editor.

       In the above example, server3.example.com was removed and newnode.example.com is the new node.

17. Verify that the new localblock PV is available.

    $oc get pv | grep localblock | grep Available
    local-pv-551d950     512Gi    RWO    Delete  Available
    localblock     26s

    Copy to Clipboard Toggle word wrap

18. Change to the openshift-storage project.

    $ oc project openshift-storage

    Copy to Clipboard Toggle word wrap

19. Remove the failed OSD from the cluster. You can specify multiple failed OSDs if required.

    $ oc process -n openshift-storage ocs-osd-removal \
    -p FAILED_OSD_IDS=failed-osd-id1,failed-osd-id2 | oc create -f -

    Copy to Clipboard Toggle word wrap

20. Verify that the OSD was removed successfully by checking the status of the ocs-osd-removal-job pod.

    A status of Completed confirms that the OSD removal job succeeded.

    # oc get pod -l job-name=ocs-osd-removal-job -n openshift-storage

    Copy to Clipboard Toggle word wrap
    Note

    If ocs-osd-removal-job fails and the pod is not in the expected Completed state, check the pod logs for further debugging. For example:

    # oc logs -l job-name=ocs-osd-removal-job -n openshift-storage

    Copy to Clipboard Toggle word wrap

21. Identify the PV associated with the PVC.

    # oc get pv -L kubernetes.io/hostname | grep localblock | grep Released
    local-pv-d6bf175b  512Gi  RWO  Delete  Released  openshift-storage/ocs-deviceset-0-data-0-6c5pw  localblock  2d22h  server3.example.com

    Copy to Clipboard Toggle word wrap

    If there is a PV in Released state, delete it.

    # oc delete pv <persistent-volume>

    Copy to Clipboard Toggle word wrap

    For example:

    # oc delete pv local-pv-d6bf175b
    persistentvolume "local-pv-d6bf175b" deleted

    Copy to Clipboard Toggle word wrap

22. Identify the crashcollector pod deployment.

    $ oc get deployment --selector=app=rook-ceph-crashcollector,node_name=failed-node-name -n openshift-storage

    Copy to Clipboard Toggle word wrap

    If there is an existing crashcollector pod deployment, delete it.

    $ oc delete deployment --selector=app=rook-ceph-crashcollector,node_name=failed-node-name -n openshift-storage

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23. Delete the ocs-osd-removal job.

    # oc delete -n openshift-storage job ocs-osd-removal-job

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    Example output:

    job.batch "ocs-osd-removal-job" deleted

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