[Linux-HA] Colocation of promoted DRBD resources

[Andrew Beekhof]

On 10/31/07, Remigiusz Stachura <remigiusz.stachura at gmail.com> wrote:
> I have created colocation:
> <rsc_colocation id="drbd0_drbd1_master" from="ms-drbd0"
> from_role="master" to="ms-drbd1" to_role="master" score="INFINITY"/>
> but after putting it to cib.xml I get stange effect - resource
> ms-drbd0 on node2 stop running:
> node1: ms-drbd0 - master, ms-drbd1 - master
> node2: ms-drbd0 - not running, ms-drbd1 - slave.
> After removing the colocation everything works like befor.
>
> What are another ways?

I think rather than invent other ways I'd prefer to make this one actually work.
Can you attach cibadmin -Ql when the cluster in the state described above?

> Is it possible by using scores to make change
> of state of one resource to have effect to another ones?
>
> thanks
>
> 2007/10/31, Andrew Beekhof <beekhof at gmail.com>:
> > On 10/29/07, Remigiusz Stachura <remigiusz.stachura at gmail.com> wrote:
> > > Hi,
> > > I have a two-node cluster that has more then 2 multi-state drbd
> > > resources on each node. All these resources must be promoted
> > > to master state on the same node because they creates a filesystem for
> > > Xen DomU. Xen will never migrate so I use DRBD 7.x and the most fresh
> > > HA 2.1.2-15 working on SLES10 SP1.
> > > I have created configuration included as a cib2.xml which mainly do what I want.
> > > (for testing only there are 2 drbd resources and IPaddr resource - not
> > > Xen resource)
> > >
> > > My problem is I wasn't able to create rule which make:
> > >
> > > -if one of the drbd resources fail on the primary node, all of them
> > > should be on the secondary node promoted to master before starting
> > > there Xen.
> >
> > did you try a colocation constraint with from_role and to_role both
> > set to Master?
> >
> > >
> > > How can I create such rules?
> > > Could you give same examples?
> > >
> > > thanks in advance
> > >
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> > >
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