# Preparing Xen Hypervisors for Conversion to Red Hat Virtualization

Before you perform a backup operation for Xen hypervisors that you plan to convert, you must convert the hypervisors to KVM-compatible VMs.

## Procedure

1. Install the following virtio drivers on the source VM: virtio, virtio_blk, virtio_pci, virtio_scsi, virtio_net, virtio_balloon.

2. Back up the VM and then restore it to RHEV domain.

3. If the VM does not boot, export the VM to Export domain using the ovirt GUI.

4. Note the IDs of the exported disks on the ovirt portal.

5. Note the exact location where the disks are present inside the storage domain.

   For example:

       cd /STORE/Export/1c2f70d6-5d90-4697-b0f6-48369595ab81/images/8576d830-9a94-4a09-a961-c2132722cd03/

   --Export Domain- ------------------Disk ID------------------------------

6. Inside this, you will see a disk that can be of format raw or qcow2, and a disk of te same GUID and of format .meta.

   For example:

   54dd31c1-adb7-495f-911c-33b6f118f587 54dd31c1-adb7-495f-911c-33b6f118f587.meta

7. Run the following command:

       yum install virt-v2v

8. Run the following command:

       "virt-v2v -i disk 54dd31c1-adb7-495f-911c-33b6f118f587 -o rhv -os /STORE/NFSRED/"

   ---storage domain path where the disk will be exported--

9. While running, the system might ask for the libvirt authentication. For example:

       [root@redsea 8576d830-9a94-4a09-a961-c2132722cd03]# virt-v2v -i disk 54dd31c1-adb7-495f-911c-33b6f118f587 -o rhv -os  /STORE/NFSRED/

       [   0.0] Opening the source -i disk 54dd31c1-adb7-495f-911c-33b6f118f587

       [   0.0] Creating an overlay to protect the source from being modified

       [   0.2] Opening the overlay

       libvirt needs authentication to connect to libvirt URI qemu:///system

       (see also: http://libvirt.org/auth.html http://libvirt.org/uri.html)

       Please enter your authentication name:

       --> If authentication is not set or do not remember run below command to set a new auth.

       saslpasswd2 -a libvirt root                                (replace root with any username)

       Password:

10. Once again, run the following command:

        "virt-v2v -i disk 54dd31c1-adb7-495f-911c-33b6f118f587 -o rhv -os /STORE/NFSRED/"

    The output should look like the following:

        virt-v2v -i disk 54dd31c1-adb7-495f-911c-33b6f118f587 -o rhv -os /STORE/NFSRED/

        [   0.0] Opening the source -i disk 54dd31c1-adb7-495f-911c-33b6f118f587

        [   0.1] Creating an overlay to protect the source from being modified

        [   0.2] Opening the overlay

        libvirt needs authentication to connect to libvirt URI qemu:///system

        (see also: http://libvirt.org/auth.html http://libvirt.org/uri.html)

        Please enter your authentication name: root

        Please enter your password:

        [  17.1] Inspecting the overlay

        [  30.4] Checking for sufficient free disk space in the guest

        [  30.4] Estimating space required on target for each disk

        [  30.4] Converting Red Hat Enterprise Linux Server 7.4 (Maipo) to run on KVM

        virt-v2v: warning: /files/boot/grub2/device.map/hd0 references unknown

        device "xvdb".  You may have to fix this entry manually after conversion.

        virt-v2v: This guest has virtio drivers installed.

        [ 102.1] Mapping filesystem data to avoid copying unused and blank areas

        [ 103.2] Closing the overlay

        [ 105.4] Assigning disks to buses

        [ 105.4] Checking if the guest needs BIOS or UEFI to boot

        [ 105.4] Initializing the target -o rhv -os /STORE/NFSRED/

        [ 105.5] Copying disk 1/1 to /STORE/NFSRED/16313287-7821-44e5-af53-31aa954726d5/images/035669b8-6022-4123-98b2-ac2dd6ed4bd9/4d83f0f2-2799-444d-b9eb-234821b73

        (100.00/100%)

        [ 115.3] Creating output metadata

        [ 115.4] Finishing off

11. On the ovirt portal, go to the storage domain --> disk import and then import the disks.

12. Create a VM of these disks.

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