Re: [Xen-devel] Re: XCP/XenServer Migration utility now available at xen.org

[Marco Sinhoreli <msinhore@gmail.com>]

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Other doubt: Could I migrate a KVM VM to XCP?


On Mon, Mar 15, 2010 at 5:30 PM, Marco Sinhoreli <msinhore@gmail.com> wrote:

> Hi David,
>
> Could I migrate a Citrix XenServer VM to XCP as well?
>
> Cheers,
>
>
> 2010/3/15 David Markey <admin@dmarkey.com>
>
>> 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  's/xvda2/xvdb/g' /mnt/tmp/etc/fstab
>> /mnt/tmp/etc/fstab
>>
>> umount /mnt/tmp
>>
>>
>>
>>
>>
>>
>> 2010/3/15 Martinx - ジェームズ <thiagocmartinsc@gmail.com>
>>
>>> 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@dmarkey.com>
>>>
>>>> Wow, what a pain :)
>>>>
>>>>
>>>>
>>>> 2010/3/15 Martinx - ジェームズ <thiagocmartinsc@gmail.com>
>>>>
>>>>> Yeah! Sure!
>>>>>
>>>>>  Today 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@dmarkey.com>
>>>>>
>>>>>> 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 - ジェームズ <thiagocmartinsc@gmail.com>
>>>>>>
>>>>>>> Exactly!
>>>>>>>
>>>>>>>  The 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@dmarkey.com>
>>>>>>>
>>>>>>>> I'm confused,
>>>>>>>>
>>>>>>>> You supply 2 fstabs there, one using LVM, one without. Which one is
>>>>>>>> it?
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> 2010/3/15 Martinx - ジェームズ <thiagocmartinsc@gmail.com>
>>>>>>>>
>>>>>>>> Hi David!
>>>>>>>>>
>>>>>>>>>  My Xen domU in my open source dom0 (Debian) have this
>>>>>>>>> configuration file:
>>>>>>>>>
>>>>>>>>> ----
>>>>>>>>> bootloader  = '/usr/bin/pygrub'
>>>>>>>>> extra       = 'console=hvc0'
>>>>>>>>> memory      = '64'
>>>>>>>>> disk        = [
>>>>>>>>>                   'phy:/dev/HyperVG01/guest01-root,xvda1,w',
>>>>>>>>>                   'phy:/dev/HyperVG01/guest01-swap,xvda2,w',
>>>>>>>>>               ]
>>>>>>>>> name        = 'guest01'
>>>>>>>>> vif         = [ 'mac=00:01:64:4b:0d:2e, vifname=guest01-eth0,
>>>>>>>>> bridge=eth0' ]
>>>>>>>>> on_poweroff = 'destroy'
>>>>>>>>> on_reboot   = 'restart'
>>>>>>>>> on_crash    = 'restart'
>>>>>>>>> ----
>>>>>>>>>
>>>>>>>>>  My guest01 /etc/fstab file:
>>>>>>>>>
>>>>>>>>> proc            /proc           proc    defaults        0       0
>>>>>>>>> /dev/xvda1      /               ext3    relatime,errors=remount-ro
>>>>>>>>> 0       1
>>>>>>>>> /dev/xvda2      none            swap    sw              0       0
>>>>>>>>>
>>>>>>>>>  BUT, this is for open source Xen domU, within the XenServer, the
>>>>>>>>> guest01 should be:
>>>>>>>>>
>>>>>>>>> proc            /proc           proc    defaults        0       0
>>>>>>>>> /dev/xvda1      /boot           ext2    defaults        0       2
>>>>>>>>> /dev/mapper/vdwuaf1-root /               ext3    errors=remount-ro
>>>>>>>>> 0       1
>>>>>>>>> /dev/mapper/vdwuaf1-swap_1 none            swap    sw
>>>>>>>>> 0       0
>>>>>>>>>
>>>>>>>>>  And 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/xvda1   *          63      498014      248976   83  Linux
>>>>>>>>> /dev/xvda2          498015    16771859     8136922+  8e  Linux LVM
>>>>>>>>>
>>>>>>>>>  You tool can recreate the partition scheme? Or it just copy the
>>>>>>>>> domU as is?
>>>>>>>>>  I have many others domU like this to copy...
>>>>>>>>>
>>>>>>>>> Thanks!
>>>>>>>>> Thiago
>>>>>>>>>
>>>>>>>>> 2010/3/15 David Markey <admin@dmarkey.com>
>>>>>>>>>
>>>>>>>>> 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.
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> 2010/3/12 Martinx - ジェームズ <thiagocmartinsc@gmail.com>
>>>>>>>>>>
>>>>>>>>>>> Really COOL!!! I'm doing all this work manually until now!
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> On 12 March 2010 15:33, David Markey <david.markey@citrix.com>wrote:
>>>>>>>>>>>
>>>>>>>>>>>> Hi all,
>>>>>>>>>>>>
>>>>>>>>>>>> A new python based migration utility for migrating your xend
>>>>>>>>>>>> virtual machines to XCP  is now available at:
>>>>>>>>>>>>
>>>>>>>>>>>> http://www.xen.org/products/cloud_projects.html
>>>>>>>>>>>>
>>>>>>>>>>>> It can generate XVAs from your xend based HVM and
>>>>>>>>>>>> paravirtualised virtual machines.
>>>>>>>>>>>> It can also steam your VM directly to a XenServer/XCP host over
>>>>>>>>>>>> HTTP or HTTPS.
>>>>>>>>>>>>
>>>>>>>>>>>> Please read the README for pointers and guidelines on how to
>>>>>>>>>>>> prepare your VMs for migration to XCP. Most PV based virtual machines will
>>>>>>>>>>>> need some preparation work.
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> Thanks to Stephen Spector and Dave Scott!
>>>>>>>>>>>>
>>>>>>>>>>>> Enjoy,
>>>>>>>>>>>>
>>>>>>>>>>>> David
>>>>>>>>>>>>
>>>>>>>>>>>> _______________________________________________
>>>>>>>>>>>> Xen-users mailing list
>>>>>>>>>>>> Xen-users@lists.xensource.com
>>>>>>>>>>>> http://lists.xensource.com/xen-users
>>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> _______________________________________________
>>>>>>>>>>> Xen-devel mailing list
>>>>>>>>>>> Xen-devel@lists.xensource.com
>>>>>>>>>>> http://lists.xensource.com/xen-devel
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>
>>>>>>>
>>>>>>
>>>>>
>>>>
>>>
>>
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>>
>>
>
>
> --
> Marco Sinhoreli
>



-- 
Marco Sinhoreli

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