[Pacemaker] Failing back a multi-state resource eg. DRBD

[Dejan Muhamedagic]

Hi Holger,

On Fri, Mar 11, 2011 at 02:45:07PM +0100, Holger Teutsch wrote:
> On Mon, 2011-03-07 at 14:21 +0100, Dejan Muhamedagic wrote:
> > Hi,
> > 
> > On Fri, Mar 04, 2011 at 09:12:46AM -0500, David McCurley wrote:
> > > Are you wanting to move all the resources back or just that one resource?
> > > 
> > > I'm still learning, but one simple way I move all resources back from nodeb to nodea is like this:
> > > 
> > > # on nodeb
> > > sudo crm node standby
> > > # now services migrate to nodea
> > > # still on nodeb
> > > sudo crm node online
> > > 
> > > This may be a naive way to do it but it works for now :)
> > 
> > Yes, that would work. Though that would also make all other
> > resources move from the standby node.
> > 
> > > There is also a "crm resource migrate" to migrate individual resources.  For that, see here:
> > 
> > resource migrate has no option to move ms resources, i.e. to make
> > another node the master.
> > 
> > What would work right now is to create a temporary location
> > constraint:
> > 
> > location tmp1 ms-drbd0 \
> >         rule $id="tmp1-rule" $role="Master" inf: #uname eq nodea
> > 
> > Then, once the drbd got promoted on nodea, just remove the
> > constraint:
> > 
> > crm configure delete tmp1
> > 
> > Obviously, we'd need to make some improvements here. "resource
> > migrate" uses crm_resource to insert the location constraint,
> > perhaps we should update it to also accept the role parameter.
> > 
> > Can you please make an enhancement bugzilla report so that this
> > doesn't get lost.
> > 
> > Thanks,
> > 
> > Dejan
> 
> Hi Dejan,
> it seems that the original author did not file the bug.
> I entered it as
> 
> http://developerbugs.linux-foundation.org/show_bug.cgi?id=2567

Thanks for taking care of that.

Dejan

> Regards
> Holger
> 
> 
> 
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