Chapter 5. Scaling storage of VMware OpenShift Data Foundation cluster

Procedure

1. Log in to the OpenShift Web Console.
2. Click Operators Installed Operators.
3. Click OpenShift Data Foundation Operator.

4. Click the Storage Systems tab.

   1. Click the Action Menu (⋮) on the far right of the storage system name to extend the options menu.
   2. Select Add Capacity from the options menu.
   3. Select the Storage Class. Choose the storage class which you wish to use to provision new storage devices.
   4. Click Add.
5. To check the status, navigate to Storage Data Foundation and verify that Storage System in the Status card has a green tick.

Procedure

1. Update the dataPVCTemplate size for the storageDeviceSets with the new desired size using the oc patch command.

     storageDeviceSets:
     - name: example-deviceset
       count: 3
       resources: {}
       placement: {}
       dataPVCTemplate:
         spec:
           storageClassName:
           accessModes:
           - ReadWriteOnce
           volumeMode: Block
           resources:
             requests:
               storage: 512Gi

   In this example YAML, the storage parameter under storageDeviceSets reflects the current size of 512Gi.

   1. Using the oc patch command:

      Get the current OSD storage for the storageDeviceSets you are increasing storage for:

       oc get storagecluster ocs-storagecluster -n openshift-storage -o jsonpath='
      {.spec.storageDeviceSets[0].dataPVCTemplate.spec.resources.requests.storage}
      '
      
      512Gi

   2. Increase the storage with the desired value (the following example reflect the size change of 2Ti):

      oc patch storagecluster ocs-storagecluster -n openshift-storage --type merge --patch "$(oc get storagecluster ocs-storagecluster -n openshift-storage -o jsonpath='
      
      {.spec.storageDeviceSets[0]}
      ' | jq '.dataPVCTemplate.spec.resources.requests.storage="2Ti"' | jq -c '{spec: {storageDeviceSets: [.]}}')"
      
      storagecluster.ocs.openshift.io/ocs-storagecluster patched

2. Wait for the OSDs to restart.

3. Confirm that the resize took effect:

   $ oc get pvc -l ceph.rook.io/DeviceSet -n openshift-storage

   Verify that for all the resized OSDs, resize is completed and reflected correctly in the CAPACITY column of the command output.

4. If the resize did not take effect, restart the OSD pods again. It may take multiple restarts for the resize to complete.

Procedure

1. Navigate to Compute Machine Sets.

2. On the machine set where you want to add nodes, select Edit Machine Count.

   1. Add the amount of nodes, and click Save.
   2. Click Compute Nodes and confirm if the new node is in Ready state.

3. Apply the OpenShift Data Foundation label to the new node.

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

Verification steps

1. Execute the following command in the terminal 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

2. On the OpenShift web console, click Workloads Pods, confirm that at least the following pods on the new node are in Running state:

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

Procedure

1. Depending on the type of infrastructure, perform the following steps:

   1. Get a new machine with the required infrastructure. See Platform requirements.
   2. Create a new OpenShift Container Platform worker node using the new machine.

2. Check for certificate signing requests (CSRs) that are in Pending state.

   $ oc get csr

3. Approve all the required CSRs for the new node.

   $ oc adm certificate approve <Certificate_Name>

   <Certificate_Name>

   Is the name of the CSR.

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

5. Apply the OpenShift Data Foundation 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

   • Apply the OpenShift Data Foundation label to the new node.

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

     <new_node_name>

     Is the name of the new node.

Verification steps

1. Execute the following command in the terminal 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

2. On the OpenShift web console, click Workloads Pods, confirm that at least the following pods on the new node are in Running state:

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

Procedure

1. Depending on the type of infrastructure, perform the following steps:

   1. Get a new machine with the required infrastructure. See Platform requirements.
   2. Create a new OpenShift Container Platform worker node using the new machine.

2. Check for certificate signing requests (CSRs) that are in Pending state.

   $ oc get csr

3. Approve all the required CSRs for the new node.

   $ oc adm certificate approve <Certificate_Name>

   <Certificate_Name>

   Is the name of the CSR.

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

5. Apply the OpenShift Data Foundation 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

   • Apply the OpenShift Data Foundation label to the new node.

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

     <new_node_name>

     Is the name of the new node.

6. Click Operators Installed Operators from the OpenShift Web Console.

   From the Project drop-down list, make sure to select the project where the Local Storage Operator is installed.

7. Click Local Storage.

8. Click the Local Volume Discovery tab.

   1. Beside the LocalVolumeDiscovery, click Action menu (⋮) Edit Local Volume Discovery.
   2. In the YAML, add the hostname of the new node in the values field under the node selector.
   3. Click Save.

9. Click the Local Volume Sets tab.

   1. Beside the LocalVolumeSet, click Action menu (⋮) Edit Local Volume Set.

   2. In the YAML, add the hostname of the new node in the values field under the node selector.

      
   3. Click Save.

Verification steps

1. Execute the following command in the terminal 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

2. On the OpenShift web console, click Workloads Pods, confirm that at least the following pods on the new node are in Running state:

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