[Pacemaker] Live migration with order constraints

[Dejan Muhamedagic]

Hi,

On Thu, Nov 10, 2011 at 01:01:12PM +0100, Andreas Kurz wrote:
> 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.

Actually, it's called ManageVE. Well, I wonder what else an RA
could do other than manage :->

Thanks,

Dejan

> >> 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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> 
> 
> 



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