[Linux-cluster] Use alternate network interfaces for heartbeat in RHCS

brem belguebli brem.belguebli at gmail.com
Fri Aug 28 14:10:14 UTC 2009


I'm trying to send cluster communications thru dedicated LAN interfaces (out
of band network) separate from the production interfaces but it doesn't seem
to be functional.

I have a 2 nodes cluster (RHEL 5.3) with 2 bonding interfaces each, one
bonding for production on a given Vlan and the other on a dedicated and
isolated LAN (out of band LAN).

According to some cman doc (that may be outdated), the way to do so is
to declare explicitely at each clusternode level  the multicast addr of the
cluster and the interface on which the coms are sent.

 <clusternode name="node1.mydomain" nodeid="1" votes="1">
                        <multicast addr="" interface="bond1"/>
<clusternode name="node2.mydomain" nodeid="2" votes="1">
                        <multicast addr="" interface="bond1"/>

and the cman multicast addr:

<cman expected_votes="3" two_node="0">
                <multicast addr=""/>
(I have a qdiskd).

After restarting the cluster, traffic is still sent through bond0 which is
the production interface.(tcpdump -i bond0 host

Any idea ?

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