Chapter 1. Deploy using dynamic storage devices

1. Log in to the Red Hat Enterprise Linux based node and open a terminal.

2. Verify that the node has access to the rhel-7-server-extras-rpms repository.

   # subscription-manager repos --list-enabled | grep rhel-7-server

   If you do not see both rhel-7-server-rpms and rhel-7-server-extras-rpms in the output, or if there is no output, run the following commands to enable each repository.

   # subscription-manager repos --enable=rhel-7-server-rpms
   # subscription-manager repos --enable=rhel-7-server-extras-rpms

3. Install the required packages.

   # yum install -y policycoreutils container-selinux

4. Persistently enable container use of the Ceph file system in SELinux.

   # setsebool -P container_use_cephfs on

Procedure

1. Click Operators OperatorHub in the left pane of the OpenShift Web Console.
2. Use Filter by keyword text box or the filter list to search for OpenShift Container Storage from the list of operators.
3. Click OpenShift Container Storage.
4. On the OpenShift Container Storage operator page, click Install.

5. On the Install Operator page, ensure the following options are selected by default::

   1. Update Channel as stable-4.6
   2. Installation Mode as A specific namespace on the cluster
   3. Installed Namespace as Operator recommended namespace openshift-storage. If Namespace openshift-storage does not exist, it will be created during the operator installation.
   4. Select Enable operator recommended cluster monitoring on this namespace checkbox as this is required for cluster monitoring.

   5. Select Approval Strategy as Automatic or Manual. Approval Strategy is set to Automatic by default.

      • Approval Strategy as Automatic.

        Note

        When you select the Approval Strategy as Automatic, approval is not required either during fresh installation or when updating to the latest version of OpenShift Container Storage.

        1. Click Install
        2. Wait for the install to initiate. This may take up to 20 minutes.
        3. Click Operators Installed Operators
        4. Ensure the Project is openshift-storage. By default, the Project is openshift-storage.
        5. Wait for the Status of OpenShift Container Storage to change to Succeeded.

      • Approval Strategy as Manual.

        Note

        When you select the Approval Strategy as Manual, approval is required during fresh installation or when updating to the latest version of OpenShift Container Storage.

        1. Click Install

        2. On the Manual approval required page, you can either click Approve or View Installed Operators in namespace openshift-storage to install the operator.

           Important

           Before you click either of the options, wait for a few minutes on the Manual approval required page until the install plan gets loaded in the window.

           Important

           If you choose to click Approve, you must review the install plan before you proceed.

           • If you click Approve.

             • Wait for a few minutes while the OpenShift Container Storage Operator is getting installed.
             • On the Installed operator - ready for use page, click View Operator.
             • Ensure the Project is openshift-storage. By default, the Project is openshift-storage.
             • Click Operators Installed Operators
             • Wait for the Status of OpenShift Container Storage to change to Succeeded.

           • If you click View Installed Operators in namespace openshift-storage .

             • On the Installed Operators page, click ocs-operator.
             • On the Subscription Details page, click the Install Plan link.
             • On the InstallPlan Details page, click Preview Install Plan.
             • Review the install plan and click Approve.
             • Wait for the Status of the Components to change from Unknown to either Created or Present.
             • Click Operators Installed Operators
             • Ensure the Project is openshift-storage. By default, the Project is openshift-storage.
             • Wait for the Status of OpenShift Container Storage to change to Succeeded.

Procedure

1. Click Operators Installed Operators to view all the installed operators.

   Ensure that the Project selected is openshift-storage.

   Figure 1.1. OpenShift Container Storage Operator page

   

2. Click OpenShift Container Storage.

   Figure 1.2. Details tab of OpenShift Container Storage

   

3. Click Create Instance link of Storage Cluster.

   Figure 1.3. Create Storage Cluster page

   

4. On the Create Storage Cluster page, ensure that the following options are selected:

   1. In the Select Mode section, Internal mode is selected by default.
   2. Storage Class is set by default to thin for VMware.

   3. Select OpenShift Container Storage Service Capacity from drop down list.

      Note

      Once you select the initial storage capacity, cluster expansion will only be performed using the selected usable capacity (times 3 of raw storage).

   4. (Optional) In the Encryption section, set the toggle to Enabled to enable data encryption on the cluster.

   5. In the Nodes section, select at least three worker nodes from the available list for the use of OpenShift Container Storage service.

      It is recommended that the worker nodes are spread across three different physical nodes, racks or failure domains for high availability.

      Note

      • To find specific worker nodes in the cluster, you can filter nodes on the basis of Name or Label.

        • Name allows you to search by name of the node
        • Label allows you to search by selecting the predefined label
      • Use vCenter anti-affinity to align OpenShift Container Storage rack labels with physical nodes and racks in the data center to avoid scheduling two worker nodes on the same physical chassis.

      If the nodes selected do not match the OpenShift Container Storage cluster requirement of an aggregated 30 CPUs and 72 GiB of RAM, a minimal cluster will be deployed. For minimum starting node requirements, see Resource requirements section in Planning guide.

5. Click Create.

   The Create button is enabled only after you select three nodes. A new storage cluster with three storage devices will be created, one per selected node. The default configuration uses a replication factor of 3.

Verification steps

1. Verify that the final Status of the installed storage cluster shows as Phase: Ready with a green tick mark.

   • Click Operators Installed Operators Storage Cluster link to view the storage cluster installation status.
   • Alternatively, when you are on the Operator Details tab, you can click on the Storage Cluster tab to view the status.
2. To verify that all components for OpenShift Container Storage are successfully installed, see Verifying your OpenShift Container Storage installation.