2.5. Creating OpenShift Data Foundation cluster on IBM Z

Procedure

1. In the OpenShift Web Console, click Operators Installed Operators to view all the installed operators.

   Ensure that the Project selected is openshift-storage.

2. Click on the OpenShift Data Foundation operator and then click Create StorageSystem.

3. In the Backing storage page, perform the following:

   1. Select the Create a new StorageClass using the local storage devices for Backing storage type option.
   2. Select Full Deployment for the Deployment type option.

   3. Click Next.

      重要

      You are prompted to install the Local Storage Operator if it is not already installed. Click Install, and follow the procedure as described in Installing Local Storage Operator.

4. In the Create local volume set page, provide the following information:

   1. Enter a name for the LocalVolumeSet and the StorageClass.

      By default, the local volume set name appears for the storage class name. You can change the name.

   2. Choose one of the following:

      • Disks on all nodes

        Uses the available disks that match the selected filters on all the nodes.

      • Disks on selected nodes

        Uses the available disks that match the selected filters only on the selected nodes.

        重要

        • The flexible scaling feature is enabled only when the storage cluster that you created with three or more nodes are spread across fewer than the minimum requirement of three availability zones.

          For information about flexible scaling, see knowledgebase article on Scaling OpenShift Data Foundation cluster using YAML when flexible scaling is enabled.

        • Flexible scaling features get enabled at the time of deployment and can not be enabled or disabled later on.

        • If the nodes selected do not match the OpenShift Data Foundation cluster requirement of an aggregated 30 CPUs and 72 GiB of RAM, a minimal cluster is deployed.

          For minimum starting node requirements, see the Resource requirements section in the Planning guide.

   3. From the available list of Disk Type, select SSD/NVME.

   4. Expand the Advanced section and set the following options:

      Volume Mode	Block is selected by default.
      Device Type	Select one or more device type from the dropdown list. By default, Disk and Part options are included in the Device Type field. 注記 For a multi-path device, select the Mpath option from the drop-down exclusively. For a DASD-based cluster, ensure that only the Part option is included in the Device Type and remove the Disk option.
      Disk Size	Set a minimum size of 100GB for the device and maximum available size of the device that needs to be included.
      Maximum Disks Limit	This indicates the maximum number of PVs that can be created on a node. If this field is left empty, then PVs are created for all the available disks on the matching nodes.

   5. Click Next.

      A pop-up to confirm the creation of LocalVolumeSet is displayed.

   6. Click Yes to continue.

5. In the Capacity and nodes page, configure the following:

   1. Available raw capacity is populated with the capacity value based on all the attached disks associated with the storage class. This takes some time to show up. The Selected nodes list shows the nodes based on the storage class.
   2. You can check the box to select Taint nodes.
   3. Click Next.

6. Optional: In the Security and network page, configure the following based on your requirement:

   1. To enable encryption, select Enable data encryption for block and file storage.

   2. Choose one or both of the following Encryption level:

      • Cluster-wide encryption

        Encrypts the entire cluster (block and file).

      • StorageClass encryption

        Creates encrypted persistent volume (block only) using encryption enabled storage class.

   3. Select Connect to an external key management service checkbox. This is optional for cluster-wide encryption.

      1. Key Management Service Provider is set to Vault by default.
      2. Enter Vault Service Name, host Address of Vault server ('https://<hostname or ip>''), Port number and Token.

      3. Expand Advanced Settings to enter additional settings and certificate details based on your Vault configuration:

         1. Enter the Key Value secret path in Backend Path that is dedicated and unique to OpenShift Data Foundation.
         2. Optional: Enter TLS Server Name and Vault Enterprise Namespace.
         3. Upload the respective PEM encoded certificate file to provide CA Certificate, Client Certificate and Client Private Key.
         4. Click Save.
   4. Select Default (SDN) as Multus is not yet supported on OpenShift Data Foundation on IBM Z.
   5. Click Next.
7. In the Data Protection page, if you are configuring Regional-DR solution for Openshift Data Foundation then select the Prepare cluster for disaster recovery (Regional-DR only) checkbox, else click Next.

8. In the Review and create page::

   1. Review the configuration details. To modify any configuration settings, click Back to go back to the previous configuration page.
   2. Click Create StorageSystem.