[Linux-cluster] Shared storage across clustered VMs?

[Jeff Karpinski]

Our assigned Red Hat engineer was on-site today and pointed out the blindingly obvious solution. Can't believe I didn't think of it: Run NFS as a clustered service and have the VMs mount that. That way ANY system - even outside of the cluster - can also access the data.

Man, I feel dumb. I should forfeit my RHCE. :-P

On Mar 3, 2010, at 12:28 AM, Xavier Montagutelli wrote:

> On Tuesday 02 March 2010 23:50:26 Jeff Karpinski wrote:
>> I've got a 4 node cluster back-ended with iSCSI storage that's happily
>> running 20 or so VMs. I now have a request to present some shared
>> storage across several of the VMs and am wondering what's the best way
>> to accomplish this. GFS2? Can VMs even communicate back with the cluster
>> for lock_dlm to work?
>> 
>> Interested in how others have skinned this cat...
> 
> I don't know if GFS2 is the best way to share data among your VMs. 
> 
> But if you go for GFS2, I suppose the clusters should be different : one 
> cluster for the hosts, and one cluster for the VMs having a shared disk with 
> GFS2. They have different purposes, you should not mix them. 
> 
> 
> 
> -- 
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