[CentOS] Recommendations

Wed May 23 21:28:15 UTC 2007
Stephen John Smoogen <smooge at gmail.com>

On 5/22/07, Scott McClanahan <scott.mcclanahan at trnswrks.com> wrote:
> We have two virtual machines on ESX 3 running CentOS 4.3 and we'd like
> to turn them into some sort of highly available nfs file server.
> Currently, I am familiar with DRBD and RHCS but I was curious what
> others might recommend in such a situation.
> I'm not sure how easily we could use RHCS in such a situation because we
> don't really have the advantage of shared storage in this setup.  We are
> strictly limited to the two boxes.  Having said that, it would be nice
> to have some of the exports running on one node (tied to a VIP) and
> others on the other node (tied to another VIP) if possible and manage
> those services individually if needed.  So basically both nodes would be
> exporting select locations at any given time on this highly available
> file system.  That is not 100% necessary but it would be nice if the
> capability is there.  I would assume some sort of fencing mechanism
> would need to been in place as well.

1) If you have a high network load.. not sure if ESX is the way to go
2) I have a limited knowledge, but NFS is not a protocol that deals
with 'failover' very well. You will want to look at a cluster
filesystem like GFS.

> This might not be the best place to ask an ESX question but would 'raw
> device mapping' work in such a scenario?  I don't know much about it.
> I can give more details if needed but hopefully this is enough for some
> suggestions.  Thanks!
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Stephen J Smoogen. -- CSIRT/Linux System Administrator
How far that little candle throws his beams! So shines a good deed
in a naughty world. = Shakespeare. "The Merchant of Venice"