[Linux-cluster] dual fence redux

[David Teigland]

On Tue, Jul 03, 2007 at 06:20:23PM -0500, Chris Harms wrote:
> To recap:
> I am attempting to setup a 2 node cluster where each will run a DB and 
> an apache service to be failed over between them.  Both are fenced via 
> Dell DRAC connected via the system NICs (this adds to the issue, but 
> manual fencing is broken).
> 
> My test case so far is to unplug the network cables from one node and 
> then reconnect them.  For some reason, both machines get halted instead 
> of one machine being fenced.  Having only one node fenced in this 
> scenario has only occurred successfully one time.
> 
> I previously suspected DRBD as being the culprit, but I can now rule 
> this out after performing the cable pull test without RHCS running, and 
> having DRBD in every possible configuration the cluster could put it in, 
> including a split brain (which is impossible for me due to services not 
> failing over until fencing occurs).
> 
> Is there any component of the cluster system that would issue the 
> shutdown command shown in the log entry below?

Perhaps qdisk?

Dave