Configuring remote disaster recovery

The disaster recovery mechanism in CloudByte ElastiStor helps you effectively retrieve data in disaster situations.

Currently, ElastiStor supports disaster recovery for a single Site. You can rebuild a primary Site using the disaster recovery copy. ElastiStor provides disaster recovery across WANs.

Setting up remote disaster recovery

  1. In the ElastiCenter navigation pane, click Virtual Storage Machines.
  2. From the list of VSMs, select the one for which remote disaster recovery has to be configured.
  3. In the actions pane, click Create DR VSM in Remote Backup.
  4. Note: This option is available only if you have not created a disaster recovery VSM (DR VSM). If a DR VSM is already created, you can modify the settings.

    remote_backup_create_dr_tsm

  5. In the Add DR VSM page, 
    1. Select the Site on which you want to configure DR VSM.
    2. Specify a name for the DR VSM.
    3. Click Next.
  6. In the following page, specify the Pool and then click Next.
  7. Select the Backup interface, IP Address, and specify a schedule for the DR VSM (in the format minutes/hours/days/month/year).
  8. Click Add.

A message appears to confirm that the DR VSM has been added.

Managing remote disaster recovery

For a specific VSM, use the Remote Backup section in the actions pane to configure remote disaster recovery.

  1. In the ElastiCenter navigation pane, click Virtual Storage Machines.
  2. From the list, select the VSM to manage remote disaster recovery.
  3. In the actions pane, use the options in the section Remote Backup.
  4. remote_backup_manage_dr_tsm

Disaster Recovery options

  • Name: Provides details of the secondary node and displays the transfer details.
  • Disable Transfer: Select and confirm to disable disaster recovery.
  • Edit Schedule: Edit the disaster recovery schedule.
  • Delete DR VSM: Remove a disaster recovery setup that you have configured.

Recovering data

Note: The DR VSM can be activated only after the base snapshot is successfully transferred from the primary VSM. You can check the status of data transfer by clicking View Transfer Status (Actions > Tasks).

  1. In the ElastiCenter navigation pane, click Virtual Storage Machines.
  2. From the list of VSMs, select the DR VSM that is associated with the Primary VSM where the disaster occurred.
  3. In the DR VSM page, go to actions pane and then click Tasks > Activate.
  4. remote_backup_click_activate

  5. In the Network settings dialog box, specify the network details of the DR VSM and then click OK.
  6. image (6)
  7. At the confirmation prompt, click Yes.
After you activate the DR VSM, the re-mount prompt appears. Ensure that you re-mount the Storage Volumes before you proceed. For details, see Connecting to ElastiStor.

Upgrading a High Availability DR setup

Follow the procedures to seamlessly upgrade a High Availability disaster recovery environment.

Node 1 and Node 2 imply the nodes on primary cluster. Similarly, DR Node 1 and DR Node 2 imply the nodes on the secondary cluster:

  1. Upgrade ElastiCenter. For details, see Upgrading to CloudByte ElastiStor 1.4 Patch 3.
  2. Move the Node 1 to maintenance mode. For details, see Configuring High Availability.
  3. Upgrade Node 1. For details, see Upgrading to CloudByte ElastiStor 1.4 Patch 3.
  4. Bring the Node 1 to Available mode. For details, see Configuring High Availability.
  5. Move the Node 2 to Maintenance mode.
  6. Upgrade Node 2.
  7. Bring the Node 2 to Available mode.
  8. Move the DR Node 1 to Maintenance mode.
  9. Upgrade DR Node 1.
  10. Bring the DR Node 1 to Available mode.
  11. Move the DR Node 2 to Maintenance mode.
  12. Upgrade DR Node 2.
  13. Bring the DR Node 2 to Available mode.

Confirm if the DR Transfer occurs after the upgrade as scheduled. In the case of any exceptions, contact CloudByte Technical Support.