[Pacemaker] Live migration with order constraints

[Andreas Kurz]

On 11/10/2011 12:48 PM, Dmitry Golubev wrote:
> Hi,
> 
>>> I am trying to make a live migration of virtual machines (custom resource
>>> agent). The idea is to suspend the virtual machine on one node, remount a
>>> filesystem (on top of DRBD) on another node and resume the virtual machine.
>>
>> May I ask: Why? There is already the VirtualDomain RA which works fine,
>> including live migration.
> 
> Because from what I gather, VirtualDomain RA works only with virsh (KVM/Xen),
> but I need OpenVZ. The second reason is that I have groups of virtual machines
> that work on the same filesystem. There is no way to get this working with
> VirtualDomain RA, especially given the next point:

Then OpenVE RA might fit.

> 
>> Yes, migration only works without order-contraints the migrating service
>> depends on ... and no way to force it.
> 
>> Use existing, working and tested RAs.
> 
> Well, then I will need to hack unfortunately :( I hope it is possible for a
> resource agent to instruct other agents to move...

no, I don't think this is possible IMHO

Regards,
Andreas

-- 
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> 
> Thanks,
> Dmitry
> 
> 
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