Performing a Failback for Microsoft Azure Stack Hub

After a VM fails over, you can perform a failback operation to return the failover VM to the original source site or a new source site. A failback operation performs a backup of the failover VM at the destination site and uses that data to replicate the VM back to the source site. If a VM already exists at the source site, the failback operation deletes the source VM and overwrites it with the failover VM.

To back up destination virtual machines after a failover, see Scheduling Backups for Destination VMs after a Failover.

For information about failover and failback operations, see Virtual Machine Failover Status and Failback Status Report.

The transport mode for replication operations is selected automatically based on the environment, and is not configurable.

Before You Begin

To perform failover or failback operations for virtual machines, you must meet the following requirements:

• The workflow engine must be installed with the CommServe system.

• Virtual machines included in a failback operation must have a status of Failover Complete or Failback Failed.

Procedure

1. Open the Live Sync Monitor tab from the instance, backup set, or subclient:

   • From the backup set, right-click the backup set and select All Tasks > Live Sync > Monitor.

   • From the subclient, right-click the subclient and select Live Sync > Monitor.

2. On the Live Sync Monitor tab, select the rows for one or more virtual machines, right-click and point to Failback.

   You can only execute a Failback operation for virtual machines from the same schedule.

   The Failback Virtual Machines dialog box appears.

3. Provide the following information:

   • Virtualization Client: Shows the name of the virtualization client to which the VM is to be restored.

   • Proxy Client: During a failback, the proxy that was specified for the original replication schedule performs the backup, and the default proxy specified for the instance or subclient replicates the virtual machine to the primary site.

   • Instance Details: Displays the host name and user account for the virtualization client.

   • Restore in place: Select this option to fail back to the original location for the primary VM. Clear the option to restore to a different destination.

   • Source VM and Disk: Displays the name of the original primary VM, with any associated disks listed under each VM.

   • Destination VM: By default, displays the name of the original primary VM.

     If the virtual machine is being replicated to the original site enter a new name. If a VM with the same name exists at the specified location, the replication operation fails unless you selected Unconditionally overwrite VM with the same name.

   • Storage Account: Select the storage account to be used for all selected virtual machines or disk.

     You can specify any storage account within the selected region.

4. To specify settings for multiple VMs, select one or more rows, and then click Configure in the Settings column.

   The Settings dialog box appears.

5. Provide any of the following information for the selected virtual machines:

   • Edit Destination VM Name (only displayed when multiple VMs are selected):

     • Prefix: Enter a prefix to be added to the destination VM names for all selected virtual machines.

     • Suffix: Enter a suffix to be added to the destination VM names for all selected virtual machines.

   • Destination VM (only displayed when a single VM is selected): You can change the name of the destination VM in this box.

   • Storage Account: Select the storage account to be used for all selected virtual machines or disk.

   • VM Size: Select a VM size from the list. The VM sizes in the list are those that are available for the resource group or cloud service you selected.

   • Operating System: Match the operating system of the source VM. If necessary, you can select the AUTO option to automatically detect the operating system of the source VM.

   • Azure Virtual Network Options:

     • Network Interface: Select one of the available network interfaces for the resource group from the list. If no VNet is selected, then the first VNet in the dropdown along with the first (default) subnet that it expands to will be attached to the synced VM.

     • Create Public IP: Select to create a public IP.

       Note

       Static IP addresses from a source VM are not replicated to the destination VM.

   • Unconditionally overwrite VM with the same name: Replace an existing virtual machine with the same name in the target location.

     If the target VM is currently powered on, the failover or failback operation fails, regardless of the setting for this option.

6. Click OK to save the options entered for the Settings dialog box.

7. Click OK to execute the selected failover scenario.