> -----Original Message----- > From: linux-cluster-bounces@xxxxxxxxxx [mailto:linux-cluster-bounces@xxxxxxxxxx] > On Behalf Of Tom Lanyon > Sent: 22 June 2010 07:55 > To: linux clustering > Subject: Re: frozen services are stopped when rgmanageris restarted > > On 22/06/2010, at 1:20 AM, Martin Waite wrote: > > Hi, > > > > RHEL 5.4: cluster2 (I think). > > > > I expected to be able to freeze a service on a node and restart rgmanager on that > node without interrupting the service. In practice, starting rgmanager causes the > service to be stopped. > > > > Is this what is supposed to happen ? I thought the whole point of freezing services > was to allow maintenance (including restarting cluster software). > > > > Are there any options to prevent the services from being stopped when rgmanager > is started ? > > > > One effect of rgmanager stopping the service is that the cluster reaches an > inconsistent state. Once rgmanager has restarted, the cluster believes that the > services are still frozen, where in reality they are stopped. Any attempt to unfreeze > the service causes the service to failover to a standby node. > > I did this recently to upgrade rgmanager on a production cluster with no downtime to > services, however I can't find the reference materials I used to do so... > > The basic steps are: > > * freeze all services > /usr/sbin/clusvcadm -Z <service> > * stop rgmanager > /sbin/service rgmanager stop > * upgrade rgmanager > yum upgrade rgmanager > * restart rgmanager manually, using the -N flag > /usr/sbin/clurgmgrd -N > * wait until rgmanager is running again (check 'clustat' output) > * unfreeze the services > /usr/sbin/clusvcadm -U <service> > > Tom > Perfect. Thanks Tom. regards, Martin -- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster
