3.11. Create sample application for testing disaster recovery solution

Procedure

1. On the Hub cluster, navigate to Applications and click Create application.
2. Select type as Subscription.
3. Enter your application Name (for example, busybox) and Namespace (for example, busybox-sample).
4. In the Repository location for resources section, select Repository type Git.

5. Enter the Git repository URL for the sample application, the github Branch and Path where the resources busybox Pod and PVC will be created.

   Use the sample application repository as https://github.com/red-hat-storage/ocm-ramen-samples where the Branch is release-4.15 and Path is busybox-odr-metro.

6. Scroll down in the form until you see Deploy application resources on clusters with all specified labels.

   • Select the global Cluster sets or the one that includes the correct managed clusters for your environment.
   • Add a label <name> with its value set to the managed cluster name.

7. Click Create which is at the top right hand corner.

   On the follow-on screen go to the Topology tab. You should see that there are all Green checkmarks on the application topology.

   注意

   To get more information, click on any of the topology elements and a window will appear on the right of the topology view.

8. Validating the sample application deployment.

   Now that the busybox application has been deployed to your preferred Cluster, the deployment can be validated.

   Log in to your managed cluster where busybox was deployed by RHACM.

   $ oc get pods,pvc -n busybox-sample

   Example output:

   NAME                          READY   STATUS    RESTARTS   AGE
   pod/busybox-67bf494b9-zl5tr   1/1     Running   0          77s
   
   
   NAME                                STATUS   VOLUME                                     CAPACITY   ACCESS MODES   STORAGECLASS                AGE
   persistentvolumeclaim/busybox-pvc   Bound    pvc-c732e5fe-daaf-4c4d-99dd-462e04c18412   5Gi        RWO            ocs-storagecluster-ceph-rbd   77s

Procedure

1. On the Hub cluster, navigate to All Clusters Applications.
2. Click the Actions menu at the end of application to view the list of available actions.
3. Click Manage data policy Assign data policy.
4. Select Policy and click Next.

5. Select an Application resource and then use PVC label selector to select PVC label for the selected application resource.

   注意

   You can select more than one PVC label for the selected application resources. You can also use the Add application resource option to add multiple resources.

6. After adding all the application resources, click Next.
7. Review the Policy configuration details and click Assign. The newly assigned Data policy is displayed on the Manage data policy modal list view.

8. Verify that you can view the assigned policy details on the Applications page.

   1. On the Applications page, navigate to the Data policy column and click the policy link to expand the view.
   2. Verify that you can see the number of policies assigned along with failover and relocate status.
   3. Click View more details to view the status of ongoing activities with the policy in use with the application.
9. After you apply DRPolicy to the applications, confirm whether the ClusterDataProtected is set to True in the drpc yaml output.

Procedure

1. On the Hub cluster, navigate to All Clusters Applications and click Create application.
2. Choose application type as Argo CD ApplicationSet - Push model
3. In General step 1, enter your Application set name.
4. Select Argo server openshift-gitops and Requeue time as 180 seconds.
5. Click Next.
6. In the Repository location for resources section, select Repository type Git.

7. Enter the Git repository URL for the sample application, the github Branch and Path where the resources busybox Pod and PVC will be created.

   1. Use the sample application repository as https://github.com/red-hat-storage/ocm-ramen-samples
   2. Select Revision as release-4.15
   3. Choose Path as busybox-odr-metro.
8. Enter Remote namespace value. (example, busybox-sample) and click Next.

9. Select Sync policy settings and click Next.

   You can choose one or more options.

10. Add a label <name> with its value set to the managed cluster name.
11. Click Next.
12. Review the setting details and click Submit.

Procedure

1. On the Hub cluster, navigate to All Clusters Applications.
2. Click the Actions menu at the end of application to view the list of available actions.
3. Click Manage data policy Assign data policy.
4. Select Policy and click Next.

5. Select an Application resource and then use PVC label selector to select PVC label for the selected application resource.

   注意

   You can select more than one PVC label for the selected application resources.

6. After adding all the application resources, click Next.
7. Review the Policy configuration details and click Assign. The newly assigned Data policy is displayed on the Manage data policy modal list view.

8. Verify that you can view the assigned policy details on the Applications page.

   1. On the Applications page, navigate to the Data policy column and click the policy link to expand the view.
   2. Verify that you can see the number of policies assigned along with failover and relocate status.
9. After you apply DRPolicy to the applications, confirm whether the ClusterDataProtected is set to True in the drpc yaml output.