Azure VM Restore Scenarios- Understanding Disaster Recovery

There are a number of restore options available for VMs. The graphic in Figure 17.36 comes directly from Microsoft’s website and is a great tool for figuring out restore scenarios and which one you should use for a given situation.

FIGURE 17.36 Restore Scenarios

Table 17.1 shows you some of the different restore scenarios, what will be done, and when to use them.

TABLE 17.1 Restore scenarios

ScenarioWhat is doneWhen to use
Create a new VMCreates and gets a basic VM up and running from a restore pointWhen you need to create a new VM.
Restore to create a new virtual machineRestores the entire VM to Original Location Recovery (OLR) (if the source VM still exists) or Alternate- Location Recovery (ALR)If the source VM is lost or corrupted, then you can restore the entire VM. You can create a copy of the VM. You can perform a restore drill for audit or compliance. If your license for Marketplace Azure VM has expired, the Create VM Restore option can’t be used.
Restore disks of the VMRestore disks attached to the VMAll disks: This option creates the template and restores the disk. You can edit this template with special configurations (e.g., availability sets) to meet your requirements and then use both the template and restore the disk to re- create the VM.
Restore specific files within the VMChoose restore point, If you know which specific files to restore, then use browse, select files, and this option instead of restoring the entire VM. restore them to the same (or compatible) OS as the backed- up VM
Cross Region Restore (CRR)Create a new VM or      Full outage: With the CRR feature, there’s no wait restore disks to a            time to recover data in the secondary region. You secondary region (Azure       can initiate restores in the secondary region even paired region) before Azure declares an outage. Partial outage: Downtime can occur in specific storage clusters where Azure Backup stores your backed-u p data or even in- network, connecting Azure Backup and storage clusters associated with your backed-u p data. With CRR, you can perform a restore in the secondary region using a replica of backed- up data in the secondary region. No outage: You can conduct business continuity and disaster recovery (BCDR) drills for audit or compliance purposes with the secondary region data. This allows you to perform a restore of backed-u p data in the secondary region even if there isn’t a full or partial outage in the primary region for business continuity and disaster recovery drills.
Select a Restore Point

A VM restore point stores VM configuration from a particular point in time. Basically, it’s a snapshot of all the managed disks that are attached to the VM. You can use VM restore points to capture multi- disk- consistent backups. VM restore points contain a disk restore point for each of the attached disks. A disk restore point consists of a snapshot of an individual managed disk.

To select a restore point, perform the following steps:

  1. Sign into the Azure portal at https://portal.azure.com.
  2. Search for Backup Center, and then go to the Backup Center dashboard.
  3. On the Overview pane, select Restore, as shown in Figure 17.37.

4. Select Azure Virtual Machines as the data source type, and then select a backup instance.

5. Select a VM and then click Continue.

6. On the next screen, select a restore point to use for the recovery, as shown in Figure 17.38.

FIGURE 17.38 Restore Virtual Machine – Select Restore Point

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