Chapter 1. Deploying OpenShift Container Storage on Google Cloud

Procedure

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

   Figure 1.1. List of operators in the Operator Hub

   

2. Click on OpenShift Container Storage.

   You can use the Filter by keyword text box or the filter list to search for OpenShift Container Storage from the list of operators.

3. On the OpenShift Container Storage operator page, click Install.

4. On the Install Operator page, ensure the following options are selected:

   1. Update Channel as stable-4.5
   2. Installation Mode as A specific namespace on the cluster
   3. Installed Namespace as Operator recommended namespace PR openshift-storage. If Namespace openshift-storage does not exist, it will be created during the operator installation.

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

Procedure

1. Click Operators Installed Operators from the OpenShift Web Console to view the installed operators. Ensure that the Project selected is openshift-storage.

2. On the Installed Operators page, click Openshift Container Storage.

   Figure 1.2. OpenShift Container Storage Operator page

   

3. On the Installed Operators Operator Details page, perform either of the following to create a Storage Cluster Service.

   1. On the Details tab Provided APIs OCS Storage Cluster, click Create Instance.

      Figure 1.3. Operator Details Page

      

   2. Alternatively, select the Storage cluster tab and click Create OCS Cluster Service.

      Figure 1.4. Storage Cluster tab

      

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

   Figure 1.5. Create Storage Cluster page

   
   1. By default, Select Mode has Internal selected.

   2. In the Nodes section, for the use of OpenShift Container Storage service, select a minimum of three or a multiple of three worker nodes from the available list.

      For cloud platforms with multiple availability zones, ensure that the Nodes are spread across different Locations/availability zones.

      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

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

   3. Storage Class is set by default to standard for Google Cloud. However, if you created a storage class to use SSD based disks for better performance, you need to select that storage class.

   4. Select OCS 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).

5. Click Create.

   Note

   The Create button is enabled only after selecting a minimum of three worker nodes.

   Upon successful deployment, a storage cluster with three storage devices gets created. These devices get distributed across three of the selected nodes. The configuration uses a replication factor of 3. To scale the initial cluster, see Scaling storage nodes.

Before you begin

1. Log in to Google Cloud web console.

2. Create Google Cloud storage bucket for MCG to store object data as described in Creating storage buckets documentation. Make sure to have a service account with the Storage Admin role.

   It is recommended to use a separate Google Cloud project to limit this service account from accessing other data.

3. Download the service account key in JSON format, which is required for the OpenShift Container Storage configuration.

1. Log in to OpenShift Container Platform web console.
2. Click Operators Installed Operators from the left pane of the OpenShift Web Console to view the installed operators.
3. Click OpenShift Container Storage Operator.

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

   Figure 1.6. OpenShift Container Storage Operator page with backing store tab

   

5. Click Create Backing Store.

   Figure 1.7. Create Backing Store page

   

6. On the Create New Backing Store page, perform the following:

   1. Enter a name for Backing Store Name.
   2. Select Google Cloud Storage as the Provider.
   3. Upload the private key JSON file for Secret key.
   4. Enter the name of the storage bucket that you created inside the Google Cloud storage account for Target Bucket. This allows you to create a connection that tells MCG that it can use this bucket for the system.
   5. Click Create Backing Store.
7. In the OpenShift Container Platform web console, click Installed Operators OpenShift Container Storage Bucket Class.
8. Edit noobaa-default-bucket-class YAML specification field spec: placementPolicy: tiers: -backingStores: to use the newly created backing store instead of noobaa-default-backing-store.

Verification steps

1. Run the following command by using the MCG command line tool noobaa (from mcg rpm package) to verify that the Google Cloud storage backing store that you created is in Ready state.

   $ noobaa status -n openshift-storage

2. Verify that the output shows the default bucket class in Ready state and uses the expected backing store.

   .
   .
   .
   ------------------
   - Backing Stores -
   ------------------
   
   NAME                         TYPE                 TARGET-BUCKET     PHASE  AGE
   gcp-backing-store            google-cloud-storage ocs-backing-store Ready  10m27s
   noobaa-default-backing-store pv-pool                                Ready  1h58m21s
   
   ------------------
   - Bucket Classes -
   ------------------
   
   NAME                          PLACEMENT                                                  PHASE   AGE
   noobaa-default-bucket-class   {Tiers:[{Placement: BackingStores:[gcp-backing-store]}]}   Ready   1h58m21s