Restoring a Kubernetes etcd Snapshot to a File System

Applies to: Only on-premises environments and self-managed cloud environments

You can restore the etcdctl snapshot and the etcd SSL certificates from the active etcd worker node to a Commvault access node. Access nodes run backups and other operations.

After the etcd snapshot and (optionally) the SSL certificates are restored, the Kubernetes infrastructure administrator can schedule the recovery or repair of etcd state on the cluster.

To avoid potentially affecting running applications and services on the Kubernetes cluster, Commvault supports restoring etcd to a Commvault access node rather than to the running cluster. etcd is a distributed key-value store, so recovery of etcd snapshots affects all control plane nodes in the cluster.

For information about the etcd v3.5 snapshot and restores, see Restoring an etcd cluster in the Kubernetes documentation.

For information about the etcd restores for the Red Hat OpenShift Container Platform (RHOCP) cluster, see Restoring to a previous cluster state on the Red Hat OpenShift website.

Procedure

1. From the navigation pane, go to Protect > Kubernetes.

   The Overview page appears.

2. On the Application groups tab, in the row for the etcd (system generated) application group, click the action button , and then select Restore.

   The Select restore type page appears.

3. Click Application files.

   The Restore page appears.

4. To select a specific backup copy to restore from, do the following:

   By default, Commvault restores content from the first available, valid backup copy that it finds.

   1. In the upper-right corner of the page, click Settings.

      The Settings dialog box appears.

   2. From the MediaAgent list, select the access node that contains the backup copy.

   3. From the Source list, select the backup copy.

   4. Click Save.

5. Click on the name of the etcd application.

   The etcd-certs and etcd-data folders appear.

   Note

   • The etcd snapshot is stored in the etcd-data folder.

   • To restore only some of the etcd content, select a folder, or continue drilling down to the content that you want to restore.

6. Click Restore.

   The Restore options dialog box appears.

7. For Path, do the following:

   1. Click the Browse button.

      You cannot enter a path by typing in the Path box.

      The Select a path dialog box appears.

   2. Select an existing folder or, to create a new folder, in the lower area of the page, click New folder.

8. To delete and overwrite existing data, move the Unconditionally overwrite if it already exists toggle key to the right, and then click Yes in the confirmation dialog box.

   If any data matching the restore data exists in the destination, Commvault deletes the existing data before starting the restore process.

9. Click Submit.