[Gluster-users] Gluster Failover Mount

[Mike.Peters at opengi.co.uk]

> -----Original Message-----
> From: James [mailto:purpleidea at gmail.com]
> Sent: 17 January 2014 11:58
> To: Mike Peters
> Cc: gluster-users at gluster.org
> Subject: Re: [Gluster-users] Gluster Failover Mount
> 
> On Fri, Jan 17, 2014 at 6:46 AM,  <Mike.Peters at opengi.co.uk> wrote:
> > Hi,
> >
> > I am currently testing GlusterFS and am looking for some advice. My setup
> uses the latest 3.4.2 packages from www.gluster.org  SLES11-SP3.
> >
> > I currently have a storage pool shared read-write across 2 gluster server
> nodes. This seems to work fine. However, I would also like to mount this pool
> on 4 further client machines running a legacy web application. Because of
> some limitations in the application, I would like to be able to tell these
> servers to mount the storage pool from one particular gluster server node,
> but to fail over to the second node if and only the first node becomes
> unavailable. I can mount the storage on the client nodes with both gluster
> nodes specified or with only one node specified but cannot see a way in the
> documentation of preferring one particular node and having the second
> node configured as a fail over. Is this possible? What am I missing?
> 
> You do realize that the initial connection is just for retrieving the volfiles, and
> then all hosts are used, right? If so, carrying on:
> 
> You can use VRRP and a VIP to specify which host to mount from. An
> example of this is done in my Puppet-Gluster setup:
> https://ttboj.wordpress.com/2014/01/08/automatically-deploying-glusterfs-
> with-puppet-gluster-vagrant/
> 
> You can specify ordering of the VIP with priority arguments to keepalived for
> example.
> 
> You can also specify more than one server on the mount command for
> glusterfs. I forget the syntax for that, but it's easy to google.
> 
> I hope this answers your questions!
> 
> James

Hi James,

That definitely sounds feasible. I hadn't thought of doing it at that layer. We use ldirectord for load balancing the webservices so I'll give that a shot this afternoon.

Thanks for your help.

Mike