[ovirt-users] New user intro & some questions

[Donny Davis]

Well said Jason, 

>From my own experience here at cloudspin, I was using gluster and virt on
the same nodes. It did work, but was less than optimal. 
 As Jason said Hardware isn't free, and neither is electricity to run said
hardware.

I am on the SAN route right now, and time will tell if it works better, the
same, or not as good.... I will post results.

If you are the only user, and you are just having fun.. or using ovirt where
I started, as a way to spin up whatever quickly, then gluster and virt will
probably be just fine.

-Donny D

-----Original Message-----
From: users-bounces at ovirt.org [mailto:users-bounces at ovirt.org] On Behalf Of
Jason Brooks
Sent: Monday, February 9, 2015 7:03 PM
To: George Skorup
Cc: users at ovirt.org
Subject: Re: [ovirt-users] New user intro & some questions



----- Original Message -----
> From: "George Skorup" <george at mwcomm.com>
> To: users at ovirt.org
> Sent: Monday, February 9, 2015 4:29:15 PM
> Subject: Re: [ovirt-users] New user intro & some questions
> 
> Scott,
> 
> I'm sure you are completely correct. I do not want to run oVirt this 
> way. I would very much prefer a dedicated machine for the engine, 
> dedicated KVM nodes and dedicated storage/gluster nodes, or a real SAN.
> But this is the "you get this" and "make it work" that I get from 
> upper management. So I'm going to continue testing 3.5.1 this way, and 
> when it's too much load / performance sucks, then I can say, "I told you
so".
> 
> I was reading through the planned features for 3.6 which says storage 
> on the virt nodes will be supported. Again, I understand this is not 
> optimal, but if I have to tell them this needs to wait for 3.6 to be 
> released for this configuration to be supported, then so be it. And if 
> performance still sucks, which I don't doubt, then... I told them so.

The meaning of "support" is important here -- support from whom? It's true
that there's no gluster+virt SKU of the RHEV downstream project.
All configurations of ovirt proper are self-supported, or community-
supported, and what we choose to support is up to us individuals.

However, gluster + virt on the same nodes does work -- even w/ management
through the engine. I do use gluster on my virt nodes, but I don't manage
them w/ the engine, because, afaik, there isn't a way to have gluster and
virt on separate networks this way, so I just manage gluster from the
gluster cli.

It's true, oVirt is happiest w/ separate machines for everything, and a
rock-solid san of some sort, etc., but that's not the only way, and as you
point out, hardware isn't free.

Jason

> 
> Anyway.. I was playing around today, and I'm not sure how or why, but 
> the engine UI now shows the gluster volume stuff.. on the combined 
> virt
> + gluster nodes.
> 
> 
> 
> On 2/7/2015 1:16 PM, Scott Worthington wrote:
> > On 2/7/2015 9:47 AM, George Skorup wrote:
> >> On 2/7/2015 7:46 AM, Scott Worthington wrote:
> >>> You can manage your oVirt gluster volumes from the oVirt engine UI.
> >>>
> >>> However, the gluster volumes cannot be on your oVirt hosts.  An 
> >>> oVirt Host cannot be an oVirt-managed gluster volume provider as 
> >>> well.  These are separate, physical hosts in oVirt <= 3.5.1.
> >> Then why did it let me add the hosts as virt & gluster (default 
> >> option
> >> 'both')
> >> during setup if it cannot be configured as such?
> > The "Both" in the --== OVIRT ENGINE CONFIGURATION ==-- section of 
> > the engine-setup refers to if you will have "both" oVirt KVM Host 
> > clusters as well as Gluster Volume clusters.  "Both" does not mean 
> > that you will have the Gluster storage daemon and KVM on the same 
> > host, as that configuration is not supported nor recommended.
> >
> > Hope that helps.
> 
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> 
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