Hi,
I have not recieved any responses to my issue yet, I am of the
feeling that the solution to this problem is straight-forward and that
some experts on the list can giude me out of this. Hope you can oblige.
Thanks & Regards
Shailesh
On Tue, 2007-07-31 at 12:05 +0530, Shailesh wrote:
> Hello All,
> I would appreciate if you could help me on this problem I
> am facing with Apache HA with HB and MON.
>
> I have been working on setting up 2 node failover cluster for my
> web service. I have installed the heartbeat 2.0.5 amd MON on the 2 SUSE
> Linux servers. The MON is monitoring the Apache webserver. I tested two
> methods of causing failover and then a failback. I end up having a
> split brain in the cluster in Method 1.
>
>
> Method 1:
>
> I find that SLAVENODE takes all the resource if I stop the heartbeat of
> the MASTERNODE by running 'rcheartbeat stop', this is quite normal.
> But If I do 'rcheartbeat start' on the MASTERNODE again to restart
> heartbeat, the MASTERNODE thinks the SLAVENODE is dead and takes over
> the resources ending up in a unrecoverable split-brain.
>
> Method 2:
> Suprisingly, If I had caused the failover by pulling off the network
> cable and the restored back the network cable followed by starting the
> heartbeat again on the MASTERNODE, I see that MASTERNODE senses the
> SLAVENODE, SLAVENODE relinquishes resources to MASTER and it seems
> all fine.
>
> I am not able to get why the Method-1 of failover is ending up with
> a split brain.
>
> My ha.cf and haresource are as below.
>
> debug 1
> logfile /var/log/ha-log
> keepalive 2
> warntime 30
> deadtime 80
> initdead 90
> node MASTERNODE
> node SLAVENODE
> bcast eth0
> udpport 694
> auto_failback on
> ping_group ping-cluster-test 10.10.10.1 10.10.10.151
> respawn hacluster /usr/lib/heartbeat/ipfail
> crm off
>
> Also attached are the master and slave dump when split brain occurs in
> Method-1.
>
> It would be great to get your solutios to this.
>
>
> Regards
> Shailesh P Shirali
>
>
>
>
>
>
>
>
>
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