Chapter 1. Deploying OpenShift Container Storage

Procedure

1. Click Operators OperatorHub in the left pane of the OpenShift Web Console.

   Figure 1.1. List of operators in the Operator Hub

   

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2. Search for OpenShift Container Storage Operator from the list of operators and click on it.
3. On the OpenShift Container Storage Operator page, click Install.

4. On the Create Operator Subscription page, you can set the Installation Mode, Update Channel, and Approval Strategy options.

   Figure 1.2. Create Operator Subscription page

   

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   1. Select A specific namespace on the cluster for the Installation Mode option.

      • Select openshift-storage namespace from the drop down menu.
   2. stable-4.2 channel is selected by default for the Update Channel option.

   3. Select an Approval Strategy:

      • Automatic specifies that you want OpenShift Container Platform to upgrade OpenShift Container Storage automatically.
      • Manual specifies that you want to have control to upgrade OpenShift Container Storage manually.

5. Click Subscribe.

   Figure 1.3. Installed operators

   

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   The Installed Operators page is displayed with the status of the operator.

Procedure

1. Click Operators Installed Operators from the left pane of the OpenShift Web Console to view the installed operators.
2. On the Installed Operator page, select openshift-storage from the Project drop down list to switch to the openshift-storage project.

3. Click OpenShift Container Storage Operator.

   OpenShift Container Storage operator creates a OCSInitialization resource automatically.

4. On the OpenShift Container Storage Operator page, scroll right and click the Storage Cluster tab.

   Figure 1.4. OpenShift Container Storage Operator page

   

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5. On the OCS Cluster Services page, click Create OCS Cluster Service.

6. On the Create New OCS Service page, perform the following:

   Figure 1.5. Create New OCS Service page

   

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   1. Select at least three worker nodes from the available list of nodes for the use of OpenShift Container Storage service.

      Note
      • Ensure that the nodes are in different Location (AWS only).
      • Ensure that the selected nodes do not have the NoSchedule label (for example the selected nodes should not be master nodes).

   2. Click Create.

      The Create button is enabled only after you select three nodes. A new storage cluster of three 2 TiB volumes will be created with one volume per worker node. The default configuration uses a replication factor of 3 providing approximately 2 TiB of usable storage.

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

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   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

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3. Install the required packages.

   # yum install -y policycoreutils container-selinux

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

   # setsebool -P container_use_cephfs on

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5. Verify that containers can now access OpenShift Container Storage hosted on this node.