[Linux-cluster] NFS Server Cluster
Robert S Peterson
rpeterso at redhat.com
Tue May 23 22:35:40 UTC 2006
On Tue, 2006-05-23 at 12:43 -0400, Mark Harrington wrote:
> Hi All,
> I am playing around with a 2 node NFS Server cluster with RHCS/GFS 4 Update
> 3 and had a few questions.
> I could not find much documentation on active-active NFS clusters with RHCS
> 4 so I set up a pseudo active-active cluster as follows:
> - Created 2 RHCS services that export a single GFS volume with NFS.
> - Each service has a prioritized fail-over domain so if:
> - Both nodes are up each node will export the GFS volume
> - A node goes down the service (& VIP) will fail over to the other node.
> - 1/2 the NFS clients (Web server farm) will mount off one VIP and the
> other 1/2 off the other.
> - The NFS clients are only permitted to mount 1 service
> 1) We are still testing this configuration but has anyone else setup an NFS
> cluster like this? Is there a better way? Can you foresee any issues with
> this setup?
I don't see any issues. As a matter of fact, I recommend exactly this
in the "NFS/GFS cookbook" document I posted a few minutes ago to
> 3) Do we need to put /var/lib/nfs on a GFS volume so both NFS servers can
> update the locks file? Will there be any issues if both NFS servers try to
> update the locks file at the same time?
I don't think so, but I could be wrong.
> 3) Is it possible to do this with NFSv4?
I'm pretty sure you can.
> Thanks for any help,
Red Hat Cluster Suite
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