Migration from VMware: Difference between revisions

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== Disk Conversion ==
== Disk Conversion ==


1) Halt the VMware VM. Examine the type of file used by the VM:
* Halt the VMware VM. Examine the type of file used by the VM:
<pre>
<pre>
# qemu-img info VMware-image.vmdk
# qemu-img info vm1.vmdk
image: VMware-image.vmdk
image: vm1.vmdk
file format: raw
file format: raw
virtual size: 23G
virtual size: 23G
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</pre>
</pre>


2) If the file format is “raw”, we need not convert the image file using qemu-img convert, just rename to .img file. If it is not “raw”, use “qemu-img” to convert the image to raw format.
* In the case above, the file format is <b>raw</b>, so it needs no conversion. Just rename the file to ".raw". However, most of the time, that will not be the case. You will need to use qemu-img to do the conversion.
<pre>

3) How to convert using qemu-img.
# qemu-img convert vm1.vmdk -O raw /volumes/vm1/vm1.img
</pre>

[root@vm_s7 guest22]# qemu-img convert guest22-flat.vmdk -O raw /volumes/guest22/guest22.img


4) Create xen config file in /etc/xen/guest22 , with the renamed/converted image file as disk.
* Create an appropriate Xen Project VM configuration file in /etc/xen/vm1, with a line specifying the converted file as disk:


disk = [ ‘file:/volumes/guest22/guest22.img,hda,w’ ]
disk = [ ‘file:/volumes/vm1/vm1.img,hda,w’ ]


* Just boot and go!
5) Boot up the xen domU guest. It should boot up fine.

Revision as of 01:01, 11 January 2015

As time passes, we are finding more and more people interested in migrating to Xen Project from VMware. The reasons for this migration include cost reduction and increased flexibility in cloud orchestration.

Introduced in the 4.5 release, Xen Project now includes the ability to use VMware VMDK files natively to ease migration. For maximum performance, it is advisable to actually translate the VM files into a raw format. But this step can be delayed, if needed, to facilitate migration.

Disk Conversion

  • Halt the VMware VM. Examine the type of file used by the VM:
# qemu-img info vm1.vmdk
image: vm1.vmdk
file format: raw
virtual size: 23G
disk size: 23G
  • In the case above, the file format is raw, so it needs no conversion. Just rename the file to ".raw". However, most of the time, that will not be the case. You will need to use qemu-img to do the conversion.
# qemu-img convert vm1.vmdk -O raw /volumes/vm1/vm1.img
  • Create an appropriate Xen Project VM configuration file in /etc/xen/vm1, with a line specifying the converted file as disk:

disk = [ ‘file:/volumes/vm1/vm1.img,hda,w’ ]

  • Just boot and go!
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