[Techtalk] Accessing a LUN From Multiple Linux Systems

[Gayathri Swaminathan]

> And I'm stuck here:
> http://sources.redhat.com/cluster/wiki/FAQ/Fencing#fence_stuck
> I'm not sure how to configure fencing methods and devices for a
> two-node cluster.
> Would the best way to do it be a qdisk?
>
>
Hi there,

Try crossover cable prior to qdisk but you can troubleshoot this following
manner:

# group_tool -v; group_tool dump gfs

Output from /var/log/messages when you did the previous commands. That will
precisely tell you which node(s) is not in fence domain yet.

So for troubleshooting sakes try (1) removing failing node from
cluster.conf..see if it starts up correctly or, (2) manual ack/override
fence_ack_manual -n <failing node>

If that goes well try adding the failing node back into the fenced domain
and give it a start..

Assumed all the way through that you went RHEL cluster with shared GFS LUN.

-- 
Gayathri Swaminathan
gpgkey: 3EFB3D39
Volunteer, FDP