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Re: [Linux-cluster] Two node cluster, start CMAN fence the other node



Hi Chris,

for the switches ports stuff check out this url:
http://www.openais.org/doku.php?id=faq:cisco_switches

We have finally configured an internal (private) VLAN joining there one NIC of each blade server. Now all cluster related traffic goes through those interfaces (eth2 at both servers in our case), including the traffic generated by the lock_dlm of the GFS2 filesystem, just created.

To check multicast connectivity, these are two very useful commands, "nc -u -vvn -z <multicast_IP> 5405" to generate some multicast udp traffic and "tcpdump -i eth2 ether multicast" to check it from the other node. (eth2 in my particular case, of course).

I have been playing a little with the lock_dlm, but here is how my cluster.conf looks now:

<?xml version="1.0"?>
<cluster config_version="7" name="VCluster">
    <fence_daemon post_fail_delay="0" post_join_delay="25"/>
    <clusternodes>
        <clusternode name="nodeaint" nodeid="1" votes="1">
            <multicast addr="239.0.0.1" interface="eth2"/>
            <fence>
                <method name="1">
                    <device name="nodeaiLO"/>
                </method>
            </fence>
        </clusternode>
        <clusternode name="nodebint" nodeid="2" votes="1">
            <multicast addr="239.0.0.1" interface="eth2"/>
            <fence>
                <method name="1">
                    <device name="nodebiLO"/>
                </method>
            </fence>
        </clusternode>
    </clusternodes>
    <cman expected_votes="1" two_node="1">
        <multicast addr="239.0.0.1"/>
    </cman>
    <fencedevices>
        <fencedevice agent="fence_ilo" hostname="nodeacn" login="user" name="nodeaiLO" passwd="hp"/>
        <fencedevice agent="fence_ilo" hostname="nodebcn" login="user" name="nodebiLO" passwd="hp"/>
    </fencedevices>
    <rm>
        <failoverdomains/>
        <resources/>
    </rm>
    <dlm plock_ownership="1" plock_rate_limit="500"/>
    <gfs_controld plock_rate_limit="500"/>
</cluster>


Next thing to add... I'm going to play a little with the quorum devices.

Hope it helps!

Alex

On 04/16/2010 05:00 PM, Jankowski, Chris wrote:
eparate the cluster interconne

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