[ClusterLabs] Antw: [EXT] Removing a resource without stopping it

[Klaus Wenninger]

On Mon, Jan 31, 2022 at 8:19 AM Ulrich Windl <
Ulrich.Windl at rz.uni-regensburg.de> wrote:

> >>> Digimer <lists at alteeve.ca> schrieb am 28.01.2022 um 22:38 in Nachricht
> <c4947cd5-b543-e720-a28d-f90ebcca1b01 at alteeve.ca>:
> > Hi all,
> >
> >    I'm trying to figure out how to move a running VM from one pacemaker
> > cluster to another. I've got the storage and VM live migration sorted,
> > but having trouble with pacemaker.
> >
> >    I tried unmanaging the resource (the VM), then deleted the resource,
> > and the node got fenced. So I am assuming it thought it couldn't stop
> > the service so it self-fenced. In any case, can someone let me know what
> > the proper procedure is?
>
> I'd try:
>
> unmanage on source cluster, migrate the VM to dest cluster.
> The set the source cluster's resource role to stopped.
> Then ´manage the resource again. The cluster should find that the resource
> is
> stopped and thus be happy.
> Then delete the stopped resource.
> On the dest custer define the resource. Thecluster should find it running
> and
> be happy.
>
Isn't that exactly what digimer mentioned in her most recent comment?

Depending on the environment it might make sense to think about
having the manual migration-step controlled by the cluster(s) using
booth. Just thinking - not a specialist on that topic ...

Klaus

>
> Regards,
> Ulrich
>
> >
> >    Said more directly;
> >
> >    How to I delete a resource from pacemaker (via pcs on EL8) without
> > stopping the resource?
>
> Bad idea IMHO.
>
> >
> > --
> > Digimer
> > Papers and Projects: https://alteeve.com/w/
> > "I am, somehow, less interested in the weight and convolutions of
> Einstein’s
>
> > brain than in the near certainty that people of equal talent have lived
> and
>
> > died in cotton fields and sweatshops." - Stephen Jay Gould
> >
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