[Linux-cluster] problems with gfs and openais cluster.

[Steven Dake]

On Sun, 2009-08-23 at 23:28 -0400, Enrique Sanchez wrote:
> On Mon, Aug 17, 2009 at 7:06 PM, Steven Dake<sdake at redhat.com> wrote:
> > On Sat, 2009-08-15 at 08:12 -0400, Enrique Sanchez wrote:
> >> On Sat, Aug 15, 2009 at 2:23 AM, Steven Dake<sdake at redhat.com> wrote:
> >> >
> >> > The openais.conf file is not used when starting with the cman service.
> >> > Instead cman uses its own configuration file
> >> > in /etc/cluster/cluster.conf.  openais should not be chkconfig'ed on
> >> > unless running without cman.
> >> >
> >> > One reason you could have the error is that you have multiple clusters
> >> > on the same multicast address as specified in /etc/cluster/cluster.conf.
> >> >
> >> > Regards
> >> > -steve
> >> >
> >>
> >> steve,
> >>
> >> thanks for the quick reply: the mcast address is the same and it
> >> looks like it is using the same VLAN here are the details....
> >>
> >> this is one cluster (cluster one):
> >>
> >>         <cman expected_votes="1" two_node="1">
> >>                 <multicast addr="224.0.0.1"/>
> >>         </cman>
> >>
> >> and this is in the 2nd cluster (cluster two)......
> >>
> >>         <cman expected_votes="1" two_node="1">
> >>                 <multicast addr="224.0.0.1" interface="eth1"/>
> >>         </cman>
> >>
> >>
> >> unfortunately eth1 is on the same VLAN for both clusters...is cluster
> >> 1 using the mcast address on both adapters?
> >>
> >> thnx...
> >> enrique.
> >
> > clusters are uniquely identified by their multicast address:port pair.
> > I suggest changing one of the cluster multicast addresses to 224.0.0.2.
> >
> > Regards
> > -steve
> >>
> >>
> >
> >
> 
> I think I need to use the <command> ccsd -m 224.0.0.2 </command> to
> make the change, just I am not sure whether I need to do a cold start
> on the cluster, will this bring the service down or can this be done
> concurrently without affecting the service.
> 
> thanks again,
> esv.
> 
Enrique,

I am not sure how you change that in a running cluster.  Best to ask
Chrissie Caulfield.

Regards
-steve