Santosh, The hosts are responsible for fencing the guests, so, as far as I know it is not possible to use fence_xvm without also configuring fence_xvmd. In our configuration we run an "inner" cluster amongst the DomU guests, and an "outer" cluster amongst the Dom0 hosts. The outer cluster starts fence_xvmd whenever cman starts. The fence_xvmd daemon listens for multicast traffic from fence_xvm. We have a dedicated VLAN for this traffic in our configuration. (Make sure your routing tables are adjusted for this, if needed--whereas aisexec figures out what interfaces to use for multicast automatically based on the bind address, fence_xvm does not.) If your Dom0 hosts are not part of a cluster, it may be possible to run fence_xvmd standalone. We have not attempted to do so, so I can't say whether it can work. Jeff > -----Original Message----- > From: linux-cluster-bounces@xxxxxxxxxx > [mailto:linux-cluster-bounces@xxxxxxxxxx] On Behalf Of > Panigrahi, Santosh Kumar > Sent: Friday, October 24, 2008 7:59 AM > To: linux clustering > Subject: cluster between 2 Xen guests where > guests are ondifferent hosts > > Hello, > > I am using RHEL5.2+RHCS and configured a 2 node cluster in > XEN virtual environment for testing purpose only. These 2 > cluster nodes are 2 virtual guests (p6pv1, p7pv1) and each > virtual guest is on different hosts/ Dom-0s (p6 & p7). I have > already gone through the older questions on this forum with > similar problems and also the wiki page > (http://sources.redhat.com/cluster/wiki/VMClusterCookbook ). > But still I have confused a bit regarding the Xen fencing in > this scenarios. > I don't want to do any live migration here and only to do a > failover/failback services between 2 cluster nodes. I want to > know whether I have to configure fencing only between the 2 > guests (using > fence_xvm) or also between the 2 hosts (using fence_xvmd) as > well, where as my cluster nodes are 2 Xen guests. > > I am configuring the cluster using luci and there options are > as follows. > > Fence Daemon Properties: > Post Fail Delay - 0 > Post Join Delay - 3 > Run XVM fence daemon - tick mark selected > > XVM fence daemon key distribution: > Enter a node hostname from the host cluster - ? > Enter a node hostname from the hosted (virtual) cluster _ ? > > Can someone please help me in this regard? > > Regards, > Santosh > > -- > Linux-cluster mailing list > Linux-cluster@xxxxxxxxxx > https://www.redhat.com/mailman/listinfo/linux-cluster > > -- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster
