[one-users] migrate causes VM to reboot

[Ruben S. Montero]

Hi

Actually OpenNebula do a restore from the checkpoint file when the VM
is "cold" migrated. It should not be restarted from the plain
deployment file. This looks like a bug.

Please Shi could you send us the vm.log file for this case (i.e. doing
a migrate between two hosts). Thanks in advance!

Cheers

Ruben

On Tue, Apr 27, 2010 at 3:49 PM, Shi Jin <jinzishuai at gmail.com> wrote:
> Neil.
> Thanks for the reply.
> Yes, livemigration does not reboot.
> However, it seems quite easy to do a cold migrate without the need to
> reboot, why not do it?
> In the current way, the VM will be shutdown improperly. For the case
> of Windows, it might cause lengthy disk check upon boot.
> In the worst case, it might generate disk failure (I haven't had it
> yet. Maybe the checkpoint flushes the cache thus is better than a
> power lose).
>
> Just my thoughts.
> Shi
>
> On Tue, Apr 27, 2010 at 1:22 AM, Neil Mooney <neil.mooney at sara.nl> wrote:
>>
>> Hi Shi
>>
>> For the machine to transfer without reboot, you probably need to use
>> livemigrate instead.
>> Do you have shared storage already ?
>>
>> The checkpoint file is probably redundant in a non live migration.(not
>> sure).
>>
>> cheers
>>
>> Neil
>>
>> --
>> * livemigrate (Migrates a running VM to another host without downtime)
>>    onevm livemigrate <vm_id> <host_id>
>>
>> Shi Jin wrote:
>>> Hi there,
>>>
>>> I am able to call "onevm migrate" to move a VM from one host to another.
>>> However, it seems that after each migration, the VM was started from
>>> the XML deployment file again.
>>>
>>> What is interesting is that a checkpoint has already been made.
>>> However, it does not seem to be used?
>>>
>>> I think this is a bug, isn't it?
>>> Thanks a lot.
>>>
>>>
>>
>>
>
>
>
> --
> Shi Jin, Ph.D.
> _______________________________________________
> Users mailing list
> Users at lists.opennebula.org
> http://lists.opennebula.org/listinfo.cgi/users-opennebula.org
>



-- 
Dr. Ruben Santiago Montero
Associate Professor (Profesor Titular), Complutense University of Madrid

URL: http://dsa-research.org/doku.php?id=people:ruben
Weblog: http://blog.dsa-research.org/?author=7