[Lustre-discuss] Redhat cluster failover

Giacomo Montagner gmontagner at sorint.it
Tue Jun 23 14:38:03 PDT 2009


On Tue, 2009-06-23 at 12:52 +0100, Daire.Byrne at framestore.com wrote:
> Hi,
> 
> I know that heartbeat is the preferred failover application for Lustre but I want to evaluate Redhat's cluster suite again. It used to be pretty ropey in the RHEL4 days but I'm led to believe it is much improved in RHEL5. I was wondering if anyone is currently using this with Lustre and if so could you share your init.d script to help get me started? Any other advice or thoughts gratefully accepted.
> 
> Regards,
> 
> Daire 

Hi! 
I'm using RHCS on RHEL 5.3 in a test environment (VMware virtual 
machines, nothing special) to failover an MGS, an MDT and four OST's 
over 2 VM. It works pretty well, I only needed to modify the original 
fs.sh resource agent script and disable almost every check - the only 
surviving check, by now, is "it's mounted/it's not mounted". I would 
like to rewrite the RA script to make it work better (with some 
effective check to see if a target is really working as it should) but I
hadn't time yet. I attach the RA script. It's ugly, and maybe some 
comment is completely nonsense or out-of-place. And perhaps my English 
gets often funny (let's say funny). 
I'm using LVM-HA to ensure no device gets mounted twice, but it should 
be an unbearable overhead in a true production environment (I think). 
Maye the lustre MMP is enough.

Bye!
Giacomo

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-- 
Giacomo Montagner
Senior System Engineer & RHCE > SORINT.LAB S.R.L. (http://www.sorintlab.com/)
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Mobile: +39.335.1294989
e-mail: giacomo.montagner at SORINT.it

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