Migrate Citrix 7.2 Xen VM to oVIRT 4.2 VM (vhd to qcow2)

I would recommend using oVirt Simple Backup for this as it is the quickest way to migrate from XENSERVER to oVIRT.

Here is the process I found to work when migrating VMs from Citrix 7.2 Xen (ovf/ova) over to oVirt 4.2 (qcow2)

Note: My VMs are all Debian OS, so with other VM types you will likely run into some issues that I have not covered below.

You will require the following ISO image for this:

http://www.system-rescue-cd.org/Download/

You will also want to make sure that you are physically connected to your XEN/oVIRT environments with the best connection possible as import/export will be done using your workstation computer.

On XenServer

shutdown VM that you will be migrating
export the VM using XenCenter as a ova/ovf package
- DONT CHECK “Create OVA Package”
- DONT CHECK “Compress OVA files”
Once done, you will get a folder with 1 or more vhd files in it.
For EACH vhd, do the following:
- Upload the vhd file to a storage domain on oVIRT with lots of space
- ssh into one of your oVirt hosts and run
```
qemu-image convert -O qcow2 input.vhd /path/to/your/storage/output.qcow2
```
- once complete, download the qcow2 file to your computer

In oVirt WebGUI

Make sure you have a working oVirtWebGUI Proxy – (Tutorial)
WebGUI – Storage – Disks – Upload
- Choose file – qcow2 file you downloaded above
- Size – full size of Disk from VM from Xen (Not Actual File Size)
- Alias – call it what you will (example: VM1Disk)
- Select your final target for the storage, disk, host, etc.
- Click OK to upload

After the file is fully uploaded and the disk is created

Compute – Machines – New

Attach new Image (bootable/os) – select your image that you uploaded
System – select memory, CPUs, NICs, etc to suit
Boot Options – CD – rescue.iso (http://www.system-rescue-cd.org/Download/)

Boot VM and use CONSOLE to configure

choose either rescue64 or rescue32
choose first option (default)

once at command line:

fsarchiver probe simple #(to retrieve your partition list)
mkdir /mnt/linux
mount /dev/vda1 /mnt/linux
mount -o bind /proc /mnt/linux/proc
mount -o bind /dev /mnt/linux/dev
mount -o bind /sys /mnt/linux/sys
chroot /mnt/linux /bin/bash
vi /etc/default/grub #change "console=hvc0" to ""
update-grub
update-initramfs -u
grub-install /dev/vda
exit
umount /mnt/linux/dev/
umount /mnt/linux/proc/
umount /mnt/linux/sys/
umount /mnt/linux/
shutdown 0 -h

remove CD from VM
start VM

On command line of VM enter:

apt-get remove xe-guest-utilities
apt-get install ovirt-guest-agent
shutdown 0 -h

In oVirt WebGUI

Navigate to the VM -> Disks
- Make sure the VM is Not Running
- Click your main disk
- Scan Alignment
  - If Alignment is okay, then all should be good
  - If Alignment is Misaligned, then do the following:
    - Boot the VM to the command line
      - using fdisk, delete the partition for your swap
      - using fdisk, create a new primary partition for your swap
      - using fdisk, “type” the new partition to 82
      - using fdisk, write the changes and then reboot the VM
    - After reboot to the command line
```
mkswap /dev/sdXX #(example: mkswap /dev/vda2)
swapon /dev/sdXX
vi /etc/fstab  #change the UUID for SWAP to the new UUID for /dev/vda2)
free -m #(should show active swap)
reboot
```

Migrate Citrix 7.2 Xen VM to oVIRT 4.2 VM (vhd to qcow2)

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