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

Wed Mar 28 09:02:54 UTC 2012

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

192.168.154.1/24 blade4-1.privdomain blade4-1 (this goes on eth1 of
blade4-1)
192.168.154.2/24 blade4-2.privdomain blade4-2 (this goes on eth1 of
blade4-2)

Same is with blade3-1 and blade3-2 (Cluster 2)

192.168.153.1/24 blade3-1.privdomain blade3-1 (this goes on eth1 of
blade3-1)
192.168.153.2/24 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

On Wed, Mar 28, 2012 at 12:54 PM, Digimer <lists at alteeve.ca> wrote:

> 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 at redhat.com
> > <mailto:fdinitto at 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
> >
> >     --
> >     Linux-cluster mailing list
> >     Linux-cluster at redhat.com <mailto:Linux-cluster at redhat.com>
> >     https://www.redhat.com/mailman/listinfo/linux-cluster
> >
> >
> >
> >
> > --
> > Linux-cluster mailing list
> > Linux-cluster at redhat.com
> > https://www.redhat.com/mailman/listinfo/linux-cluster
>
>
> --
> Digimer
> Papers and Projects: https://alteeve.com
>
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