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Re: [Xen-devel] Re: [Xen-users] XCP/XenServer Migration utility now available at xen.org
Other doubt: Could I migrate a KVM VM to XCP?On Mon, Mar 15, 2010 at 5:30 PM, Marco Sinhoreli <msinhore@xxxxxxxxx> wrote:
Hi David,
Could I migrate a Citrix XenServer VM to XCP as well?
Cheers,
2010/3/15 David Markey <admin@xxxxxxxxxxx>
No im afraid not.
YOU have to make these changes to menu.lst and fstab before migration.
If your VMs are the exact same, this should be easily scripted. i.e.
vmdisk="/dev/xen/vm1root"
mount $vmdisk /mnt/tmp
sed -i.bak -e 's/xvda1/xvda/g' -e Â's/xvda2/xvdb/g' /mnt/tmp/etc/fstab /mnt/tmp/etc/fstab
umount /mnt/tmp
2010/3/15 Martinx - ããããã <thiagocmartinsc@xxxxxxxxx>
So, your script can make a new partition scheme and a new fstab for my VMs before stream it to the XenServer?
Because I have more than 100 VMs to copy! :-/
2010/3/15 David Markey <admin@xxxxxxxxxxx>
Wow, what a pain :)
2010/3/15 Martinx - ããããã <thiagocmartinsc@xxxxxxxxx>
Yeah! Sure!
ÂToday I'm doing this work manually... I mean, to copy a VM from open source Xen to the XenServer I do:
1- stop the VM on my debian dom0;
2- mount its root file system under /mnt/source;
3- export it via NFS;
4- At the XenServer, I boot the sysrescuecd (a live system);
5- fdisk the /dev/sda;
6- create the LVM volumes;
7- mount /dev/vg01/root under /mnt/target;
8- mount /dev/sda1 under /mnt/target/boot;
9- mount the debian dom0 nfs server under /mnt/source;
10- cp /mnt/source/* /mnt/target/
11- edit the /etc/fstab and the grub's menu;
12- shutdown the VM;
13- Convert it from HVM to PVM;
14- start the VM;
Thanks, Thiago 2010/3/15 David Markey <admin@xxxxxxxxxxx>
If you change xvda1 to xvda, change xvda2 to xvdb it will work fine.
Change references in /boot/grub/menu.lst of xvda1 to xvda
Change references in /etc/fstab of xvda1 to xvda, and xvda2 to xvdb.
Understand? 2010/3/15 Martinx - ããããã <thiagocmartinsc@xxxxxxxxx>
Exactly!
ÂThe first one is for my domU hosted at my open source Xen (powered by Debian), the second fstab, is the new one, used for my guests hosted at my XenServers.
Thanks! Thiago
2010/3/15 David Markey <admin@xxxxxxxxxxx>
I'm confused,
You supply 2 fstabs there, one using LVM, one without. Which one is it?
2010/3/15 Martinx - ããããã <thiagocmartinsc@xxxxxxxxx>
Hi David!
ÂMy Xen domU in my open source dom0 (Debian) have this configuration file:
----
bootloader = '/usr/bin/pygrub'
extraÂÂÂÂÂÂ = 'console=hvc0'
memoryÂÂÂÂÂ = '64'
diskÂÂÂÂÂÂÂ = [
ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ 'phy:/dev/HyperVG01/guest01-root,xvda1,w',
ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ 'phy:/dev/HyperVG01/guest01-swap,xvda2,w',
ÂÂÂÂÂÂÂÂÂÂÂÂÂ ]
nameÂÂÂÂÂÂÂ = 'guest01'
vifÂÂÂÂÂÂÂÂ = [ 'mac=00:01:64:4b:0d:2e, vifname=guest01-eth0, bridge=eth0' ]
>on_rebootÂÂ = 'restart'
on_crashÂÂÂ = 'restart'
----
ÂMy guest01 /etc/fstab file:
procÂÂÂÂÂÂÂÂÂÂÂ /procÂÂÂÂÂÂÂÂÂÂ procÂÂÂ defaultsÂÂÂÂÂÂÂ 0ÂÂÂÂÂÂ 0
/dev/xvda1ÂÂÂÂÂ /ÂÂÂÂÂÂÂÂÂÂÂÂÂÂ ext3ÂÂÂ relatime,errors=remount-ro 0ÂÂÂÂÂÂ 1
/dev/xvda2ÂÂÂÂÂ noneÂÂÂÂÂÂÂÂÂÂÂ swapÂÂÂ swÂÂÂÂÂÂÂÂÂÂÂÂÂ 0ÂÂÂÂÂÂ 0
ÂBUT, this is for open source Xen domU, within the XenServer, the guest01 should be:
procÂÂÂÂÂÂÂÂÂÂÂ /procÂÂÂÂÂÂÂÂÂÂ procÂÂÂ defaultsÂÂÂÂÂÂÂ 0ÂÂÂÂÂÂ 0
/dev/xvda1ÂÂÂÂÂ /bootÂÂÂÂÂÂÂÂÂÂ ext2ÂÂÂ defaultsÂÂÂÂÂÂÂ 0ÂÂÂÂÂÂ 2
/dev/mapper/vdwuaf1-root /ÂÂÂÂÂÂÂÂÂÂÂÂÂÂ ext3ÂÂÂ errors=remount-ro
0ÂÂÂÂÂÂ 1
/dev/mapper/vdwuaf1-swap_1 noneÂÂÂÂÂÂÂÂÂÂÂ swapÂÂÂ swÂÂÂÂÂÂÂÂÂÂÂÂÂ 0ÂÂÂÂÂÂ 0
ÂAnd the partition table of the guest01:
guest01:~# fdisk -lu /dev/xvda
Disk /dev/xvda: 8589 MB, 8589934592 bytes
255 heads, 63 sectors/track, 1044 cylinders, total 16777216 sectors
Units = sectors of 1 * 512 = 512 bytes
Disk identifier: 0x0009c181
 Device Boot Start End Blocks Id System
/dev/xvda1ÂÂ *ÂÂÂÂÂÂÂÂÂ 63ÂÂÂÂÂ 498014ÂÂÂÂÂ 248976ÂÂ 83Â Linux
/dev/xvda2 498015 16771859 8136922+ 8e Linux LVM
ÂYou tool can recreate the partition scheme? Or it just copy the domU as is?
ÂI have many others domU like this to copy...
Thanks!
Thiago
2010/3/15 David Markey <admin@xxxxxxxxxxx>
If anyone has feature requests, direct them here.
The next feature i'll be working on is supporting kernels loaded from the Dom0. The kernel images will have to be copied to the XenServer/XCP Dom0.
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-- Marco Sinhoreli
-- Marco Sinhoreli
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