[ovirt-users] Help understanding Gluster in oVirt

[Eduardo Ramos]

I have setup an environment with 8 glustefs nodes in 
distributed+replicated mode. Instead of CTDB, I'm using keepalived. It 
works pretty well.

On 02/04/2015 04:14 PM, Donny Davis wrote:
>
> I have two nodes running the hosted engine and gluster setup for 
> replicate between them. Mounting to localhost seems to be working so 
> far. I have live migrated the engine, pulled the plug on a running 
> node, and rebooted each node to ensure it all works properly. I have 
> had few issues with this setup. I didn’t like ctdb because it adds 
> another layer of complexity that is unnecessary for MY setup.
>
> Node1 gluster drive on sdb
>
> Node2 gluster drive on sdb
>
> Both replicate and are the same make and model drive.
>
> ovirt-ha running on both for hosted-engine
>
> This setup is for hosted engine only, my actual storage for VM’s and 
> what not do not run in this fashion.
>
> Hope This helps
>
> Donny D
>
> *From:*users-bounces at ovirt.org [mailto:users-bounces at ovirt.org] *On 
> Behalf Of *Groten, Ryan
> *Sent:* Wednesday, February 4, 2015 10:11 AM
> *To:* Sahina Bose; users at ovirt.org
> *Subject:* Re: [ovirt-users] Help understanding Gluster in oVirt
>
> Nope in fact I followed the guide and found CTDB works quite well.  I 
> am just trying to figure out the benefit because that would be another 
> component to consider in the architecture.
>
> *From:*Sahina Bose [mailto:sabose at redhat.com]
> *Sent:* Tuesday, February 03, 2015 4:09 AM
> *To:* Groten, Ryan; users at ovirt.org <mailto:users at ovirt.org>
> *Subject:* Re: [ovirt-users] Help understanding Gluster in oVirt
>
> On 01/28/2015 08:59 AM, Groten, Ryan wrote:
>
>     I was planning on making a Gluster Data domain to test, and found
>     some great information on this page:
>     http://community.redhat.com/blog/2014/05/ovirt-3-4-glusterized/
>
>     The article the author uses the CTDB service for VIP failover.  Is
>     it possible/recommended to not do this, and just create a gluster
>     volume on all the hosts in a cluster, then create the Gluster data
>     domain as localhost:<gluster_vol>?
>
>
> Theoretically, it should work - if you make sure that you have a 
> replica 3 gluster volume spread across 3 nodes, and these 3 nodes are 
> your compute nodes as well - you should be fine without CTDB setup for 
> failover and mounting as localhost.
>
> But I've not tried this to recommend it. Maybe if others have tried 
> it, they can chime in?
>
> Btw, is there any reason you do not want to set up CTDB?
>
> Thanks,
>
> Ryan
>
> ThTh
>
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