[Pacemaker] Live migration with order constraints

[Dejan Muhamedagic]

On Thu, Nov 10, 2011 at 04:10:29PM +0100, Andreas Kurz wrote:
> On 11/10/2011 03:45 PM, Dejan Muhamedagic wrote:
> > 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 :->
> 
> ah, yes .. ManageVE ... thx ;-)

What I meant to say is that it's really hard to recall such a
name.

Cheers,

Dejan

> Regards,
> Andreas
> 
> > 
> > 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
> >>
> >> -- 
> >> Need help with Pacemaker?
> >> http://www.hastexo.com/now
> >>
> >>
> >>>
> >>> Thanks,
> >>> Dmitry
> >>>
> >>>
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> >>>
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> >>> Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
> >>> Bugs: http://developerbugs.linux-foundation.org/enter_bug.cgi?product=Pacemaker
> >>
> >>
> >>
> > 
> > 
> > 
> >> _______________________________________________
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> >> http://oss.clusterlabs.org/mailman/listinfo/pacemaker
> >>
> >> Project Home: http://www.clusterlabs.org
> >> Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
> >> Bugs: http://developerbugs.linux-foundation.org/enter_bug.cgi?product=Pacemaker
> > 
> > 
> > _______________________________________________
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> > http://oss.clusterlabs.org/mailman/listinfo/pacemaker
> > 
> > Project Home: http://www.clusterlabs.org
> > Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
> > Bugs: http://developerbugs.linux-foundation.org/enter_bug.cgi?product=Pacemaker
> 
> -- 
> Need help with Pacemaker?
> http://www.hastexo.com/now
> 
> 



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> 
> Project Home: http://www.clusterlabs.org
> Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
> Bugs: http://developerbugs.linux-foundation.org/enter_bug.cgi?product=Pacemaker