Veeam Backup for Nutanix AHV 2.0
User Guide
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VM Guest OS Files Restore

You can use IFLR (Instant File-Level Restore) to recover individual VM guest OS files and folders from VM backups and snapshots created by AHV Backup Proxy. IFLR does not require you to extract the VM image to a staging location or start the VM prior to restore. You can restore files and folders directly from a regular image-level backup or snapshot to the necessary point in time. You can restore files and folders to original VM or save them to a local folder on the Veeam Backup & Replication server or to a network shared folder.

IFLR works with any VM guest OS file system. Veeam Backup & Replication offers different tools and methods for different file systems.

For IFLR from FAT, NTFS, ReFS file systems and for IFLR from snapshots, Veeam Backup & Replication deploys a small temporary VM (helper appliance) on the AHV cluster. The helper appliance is a helper VM running a stripped down Linux kernel that has a minimal set of components. The appliance is quite small — around 50 MB. It requires 1024 MB RAM and takes around 10 seconds to boot. The helper appliance network settings are configured in the Appliance Settings step when you add a new AHV Nutanix AHV cluster.

To learn how Veeam Backup & Replication performs IFLR from backups and snapshots created by AHV Backup Proxy, see the following sections:

File-Level Restore from Backups

File-Level Restore from Backup Snapshots

During restore from a backup snapshot, Veeam Backup & Replication mounts disks of the VM from the backup snapshot to the Veeam Backup & Replication server (for Microsoft Windows guest OS) or to a helper appliance (for Linux and Unix guest OSes), and launches the Veeam Backup Browser with the VM file system on the Veeam Backup & Replication server. In more detail, Veeam Backup & Replication does the following:

  1. Deploys a helper appliance on the AHV cluster.
  2. Via Nutanix REST API, gets information about a selected backup snapshot and files on that VM.
  3. Creates a volume group with the VM files.
  4. Attaches the VG to the helper appliance.
  5. Powers on the helper appliance and mounts mounts disks of a VM from the backup snapshot to the helper appliance (fro Linux, Unix guest OS) or to the Veeam Backup & Replication server (for Windows guest OS).
  6. Launches the Veeam Backup Browser with the VM file system.
  7. When you finish restoring files and close Veeam Backup Browser, Veeam Backup & Replication detaches the volume group from the helper appliance, deletes the VG and unregisters the helper appliance from the AHV cluster.

File-Level Restore from User Snapshots and PD Snapshots

During restore from a user snapshot or a PD snapshot, Veeam Backup & Replication mounts disks of the VM from the snapshot to the Veeam Backup & Replication server (for Microsoft Windows guest OS) or to a helper appliance (for Linux and Unix guest OSes), and launches the Veeam Backup Browser with the VM file system on the Veeam Backup & Replication server. In more detail, Veeam Backup & Replication does the following:

  1. Via Nutanix REST API, gets information about a selected snapshot.
  2. Deploys a helper appliance on the AHV cluster.
  3. Creates a temporary VM.
  4. Creates a volume group (VG) using disks of this VM.
  5. Attaches the volume groups to the helper appliance.
  6. Deletes the temporary VM.
  7. Powers on the helper appliance and mounts mounts disks of a VM from the snapshot to the helper appliance (fro Linux, Unix guest OS) or to the Veeam Backup & Replication server (for Windows guest OS).
  1. When you finish restoring files and close Veeam Backup Browser, Veeam Backup & Replication detaches the volume group from the helper appliance, deletes the VG and unregisters the helper appliance from the AHV cluster.

How to Launch Restore of VM Guest OS Files

To restore VM guest OS files, do the following:

  1. In the Veeam Backup & Replication console, open the Home view.
  2. In the inventory pane, under Backups select Disk if you want to restore from a backup or Snapshot if you want to restore from a snapshot.
  3. In the working area, expand the necessary backup or snapshot node, right-click the VM whose VM guest OS files you want to restore and select Restore guest files > Microsoft Windows/Linux and other OSes and follow the steps of the File Level Restore wizard. For further instructions, see one of the following guides:

VM Guest OS Files Restore 

Note

VM guest OS file indexing is not supported for Nutanix AHV VM backups.

Tip

Also, you can use Veeam Backup Enterprise Manager to restore guest OS files of AHV VMs. For details, see the Restoring Guest OS Files section of the Veeam Backup Enterprise Manager User Guide.

See Also

Nutanix AHV Snapshot Types

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