Hi Digi, 1. sniplet of cluster.conf file from one cluster :- <?xml version="1.0"?> <cluster alias="Cluster" config_version="1" name="Cluster"> <clusternodes> <clusternode name="blade4-2" nodeid="2" votes="1"> <fence> <method name="1"> <device blade="2" missing_as_off="1" name="BladeCenterFencing"/> </method> </fence> </clusternode> <clusternode name="blade4-1" nodeid="1" votes="1"> <fence> <method name="1"> <device blade="1" missing_as_off="1" name="BladeCenterFencing"/> </method> </fence> </clusternode> </clusternodes> <cman expected_votes="1" two_node="1"/> <fencedevices> <fencedevice agent="fence_bladecenter" ipaddr="XXXXX" login="USERID" name="BladeCenterFencing" passwd="******"/> </fencedevices> ... Of another cluster is same except node names differ(they blade3-1 and blade3-2). 2. In /etc/hosts <a href="http://192.168.154.1/24">192.168.154.1/24</a> blade4-1.privdomain blade4-1 (this goes on eth1 of blade4-1) <a href="http://192.168.154.2/24">192.168.154.2/24</a> blade4-2.privdomain blade4-2 (this goes on eth1 of blade4-2) Same is with blade3-1 and blade3-2 (Cluster 2) <a href="http://192.168.153.1/24">192.168.153.1/24</a> blade3-1.privdomain blade3-1 (this goes on eth1 of blade3-1) <a href="http://192.168.153.2/24">192.168.153.2/24</a> blade3-2.privdomain blade3-2 (this goes on eth1 of blade3-2) 3. Public IP of blade4-1 & blade4-2 (Cluster 1) and blade3-1 & blade3-2 (Cluster 2) are on same subnet 10.5.81.xxx and subnet mask is 255.255.255. Thanks <div class="gmail_quote">On Wed, Mar 28, 2012 at 12:54 PM, Digimer <<a href="mailto:lists@alteeve.ca">lists@alteeve.ca</a>> wrote: <blockquote class="gmail_quote" style="margin:0pt 0pt 0pt 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">I'll admit to having trouble following you... So let's get some basics; * What is the cluster.conf of either cluster? * What exact IPs does the hostnames, as set in the cluster.conf, resolve to? * What is the exact IP of eth0 and eth1 on each node, inc. netmask? As a point of curiosity; why do you need the cluster names to be identical? Digi <div><div class="h5"> On 03/28/2012 12:00 AM, Parvez Shaikh wrote: > Thanks Fabio & Digimer, > > Just to add more information that each node has 4 NIC cards out of which - > > eth0 is public / management IP their addresses are falling on the same > subnet > > eth1 is private address and they are privately connected (node A - node > B) and (node C - node D) > > Cluster.conf mentions hostname(from /etc/hosts) which corresponds to IP > addresses of eth1 (not globally accessible name of eth0's IP) > > Even in situation such as above, cluster names should be unique? I would > assume that ccsd would use only the node names given in cluster.conf for > communication. > > Does ccsd use cluster name to locate other members of cluster and get > copy of cluster configuration file from those? > > Following messages are seen in /var/log/messages - > > Mar 28 11:57:07 blade4-2 ccsd[6821]: Starting ccsd 2.0.115: > Mar 28 11:57:07 blade4-2 ccsd[6821]: Built: Mar 16 2010 10:28:57 > Mar 28 11:57:07 blade4-2 ccsd[6821]: Copyright (C) Red Hat, Inc. 2004 > All rights reserved. > Mar 28 11:57:07 blade4-2 ccsd[6821]: cluster.conf (cluster name = > Cluster, version = 1) found. > Mar 28 11:57:07 blade4-2 ccsd[6821]: Remote copy of cluster.conf is from > quorate node. > Mar 28 11:57:07 blade4-2 ccsd[6821]: Local version # : 1 > Mar 28 11:57:07 blade4-2 ccsd[6821]: Remote version #: 1 > Mar 28 11:57:07 blade4-2 ccsd[6821]: Remote copy of cluster.conf is from > quorate node. > Mar 28 11:57:07 blade4-2 ccsd[6821]: Local version # : 1 > Mar 28 11:57:07 blade4-2 ccsd[6821]: Remote version #: 1 > Mar 28 11:57:07 blade4-2 ccsd[6821]: Remote copy of cluster.conf is from > quorate node. > Mar 28 11:57:07 blade4-2 ccsd[6821]: Local version # : 1 > Mar 28 11:57:07 blade4-2 ccsd[6821]: Remote version #: 1 > > > On Wed, Mar 28, 2012 at 12:13 PM, Fabio M. Di Nitto <<a href="mailto:fdinitto@redhat.com">fdinitto@redhat.com</a> </div></div><div class="im">> <mailto:<a href="mailto:fdinitto@redhat.com">fdinitto@redhat.com</a>>> wrote: > > On 3/28/2012 8:14 AM, Parvez Shaikh wrote: > > Hi experts, > > > > I am running in to a problem in a situation where two clusters in the > > network have same name. > > > > Node A, Node B : cluster name CLUSTER > > Node C, Node D : cluster name CLUSTER > > > > Node C and Node D's cluster is running fine however when I start > node A > > it copies /etc/cluster.conf (I believe ccsd) from either C and D and > > replaces its own and start attempting a cluster, of course it fails > > because C or D is not a host name of node A. > > > > Is it possible to have more than one clusters in same network, these > > nodes are in IBM blades hosted in Bladecenter and the heart beat > IPs are > > on private network. > > Uh.. you can have multiple clusters on the same network as long as they > have different names. Or you need to isolate them on different networks > if you need to keep the same name. > > Fabio > > -- > Linux-cluster mailing list </div>> <a href="mailto:Linux-cluster@redhat.com">Linux-cluster@redhat.com</a> <mailto:<a href="mailto:Linux-cluster@redhat.com">Linux-cluster@redhat.com</a>> > <a href="https://www.redhat.com/mailman/listinfo/linux-cluster" target="_blank">https://www.redhat.com/mailman/listinfo/linux-cluster</a> <div class="im HOEnZb">> > > > > -- > Linux-cluster mailing list > <a href="mailto:Linux-cluster@redhat.com">Linux-cluster@redhat.com</a> > <a href="https://www.redhat.com/mailman/listinfo/linux-cluster" target="_blank">https://www.redhat.com/mailman/listinfo/linux-cluster</a> </div><div class="HOEnZb"><div class="h5">-- Digimer Papers and Projects: <a href="https://alteeve.com" target="_blank">https://alteeve.com</a> </div></div></blockquote></div>