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Re: [Linux-cluster] Two clusters in the network with same "name" in cluster.conf



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

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 <fdinitto redhat com
> <mailto:fdinitto redhat com>> 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
> 
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> 
> 
> 
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-- 
Digimer
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