4:09 p.m.
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On 09/22/2012 02:28 PM, Nicolas Chenier wrote:
Question - if oVirt goes down... do the ovirt-nodes and VMs remain
up?
Keith, how would you set yourself up with these specs:
2 host servers (quad-core xeons with 32gigs of ram)
Are you saying that you only
have 2 machines in total, or that you have
2 machines that can be dedicated hypervisors (ie. ovirt-node) and a
third machine that can be a dedicated manager?
If the former then one machine must run some version of *nix compatible
with oVirt Manager and, the other machine in this scenario can simply
run ovirt-node.
If the latter, then you have 1 box dedicated as a manager and 2 boxes as
dedicated hypervisors. This is a fairly basic/good setup.
1 iSCSI NAS
Starting to think there is no way to achieve HA with this setup?
Not with only 2
boxes. No.
oVirt requires a dedicated machine?
Generally, speaking. Yes.
Truly HA setups aren't cheap and people often have different ideas of
what constitutes HA. Offhand I would think that you would need...
- 2 boxes for the oVirt manager
- Clustering software for the manager to facilitate an active/passive setup.
- UPSs (at *least* 2) which can be controlled by clustering software.
Why? Most clustering SW require a fence device. These will be your
fence devices.
- 2 boxes for your hypervisors (ie. ovirt-nodes). This will facilitate
fail-over from one node to the other.
HA isn't cheap and can't usually be done on 2 boxes, IMO unless you're
failing over a single app.
Thank you!
Nic
PS. Could oVirt be integrated into ovirt-node on every server?
On Sat, Sep 22, 2012 at 2:16 PM, Keith Robertson <kroberts(a)redhat.com
<mailto:kroberts@redhat.com>> wrote:
On 09/22/2012 01:09 PM, Nicolas Chenier wrote:
> Hi Alan,
>
> I have oVirt running in a VM off my Desktop (Fedora 17 w/ KVM &
> Virt-Manager) off my iSCSI NAS.
>
> I've attached Server #1 as my first host (it's running ovirt-node).
>
> In the process of setting up my storage domains. I have a few
> questions to the experts out there:
>
> 1) How do I add my CD .ISOs to setup new VMs? Create iSCSI
> storage domain? But then how do I copy my ISOs to it?
Create an ISO storage domain and use the ovirt-iso-uploader to add
your ISOs and .vfd files into that domain.
>
> 2) Can I run my oVirt VM from ovirt-node machine, without running
> it in oVirt (ie. setup iSCSI in virt-manager (as it is now) and
> run oVirt from virt-manager... then I can manage my hosts through
> that ovirt VM?
Huh? You could run the oVirt Manager from a VM managed by
virt-manager... yes. Running the oVirt manager inside a VM on a
hypervisor (ie. ovirt-node) controlled by that same manager isn't
supported AFAIK because the mgr. could get fenced.
To summarize, you can pretty much run the oVirt manager on any
supported OS as long as that OS instance isn't running on a
hypervisor (ie. ovirt-node) controlled by *that* manager.
If you haven't noticed the vocabulary to describe the various
components can get a little confusing. ;)
>
> Not sure if I'm making myself clear... but I'm making progress. I
> think as long as you are not managing your oVirt vm through oVirt
> itself, the solution should work fine! Just trying to see if I
> can get that done on an ovirt-node machine...
>
> Thank you,
>
> Nic
>
>
> On Fri, Sep 21, 2012 at 3:31 PM, Alan Johnson <alan(a)datdec.com
> <mailto:alan@datdec.com>> wrote:
>
> On Wed, Sep 12, 2012 at 9:22 PM, Nicolas Chenier
> <dascope(a)gmail.com <mailto:dascope@gmail.com>> wrote:
>
> I was under the impression that my oVirt VM would show up
> in oVirt and that I could manage it through there...
> What you're saying is that I should just run it seperatly
> and not manage it with itself (oVirt)? keep it on my
> shared storage so that I can run it off any of the 2
> servers? But not manage it with oVirt (itself). I think
> I'm starting to get it now...
> I really appreciate your help!
> Nic
>
>
> Nic, how did you make out with this? I'm looking to do the
> same thing and am wondering if there is any risk in running
> the engine on a VM managed by the same engine, as you were
> suggesting before. Did you give this a shot?
>
> Itamar, why did you steer Nic away from this?
>
> _______________
> Alan Johnson
> alan(a)datdec.com <mailto:alan@datdec.com>
>
>
>
>
> _______________________________________________
> Users mailing list
> Users(a)ovirt.org <mailto:Users@ovirt.org>
> http://lists.ovirt.org/mailman/listinfo/users
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<div class="moz-cite-prefix">On 09/22/2012 02:28 PM, Nicolas Chenier
wrote:<br>
</div>
<blockquote
cite="mid:CAJZXTno2Qqzknhr+UqHmG6r7o1JCTn-M-en01yWC=M5Gz5x=mg@mail.gmail.com"
type="cite">Question - if oVirt goes down... do the ovirt-nodes
and VMs remain up?<br>
<br>
<br>
Keith, how would you set yourself up with these specs:<br>
<br>
2 host servers (quad-core xeons with 32gigs of ram)<br>
</blockquote>
Are you saying that you only have 2 machines in total, or that you
have 2 machines that can be dedicated hypervisors (ie. ovirt-node)
and a third machine that can be a dedicated manager?<br>
<br>
If the former then one machine must run some version of *nix
compatible with oVirt Manager and, the other machine in this
scenario can simply run ovirt-node. <br>
<br>
If the latter, then you have 1 box dedicated as a manager and 2
boxes as dedicated hypervisors. This is a fairly basic/good
setup.
<br>
<blockquote
cite="mid:CAJZXTno2Qqzknhr+UqHmG6r7o1JCTn-M-en01yWC=M5Gz5x=mg@mail.gmail.com"
type="cite">1 iSCSI NAS<br>
<br>
Starting to think there is no way to achieve HA with this setup?
</blockquote>
Not with only 2 boxes. No.<br>
<blockquote
cite="mid:CAJZXTno2Qqzknhr+UqHmG6r7o1JCTn-M-en01yWC=M5Gz5x=mg@mail.gmail.com"
type="cite">oVirt requires a dedicated machine?<br>
</blockquote>
Generally, speaking. Yes.<br>
<br>
Truly HA setups aren't cheap and people often have different ideas
of what constitutes HA. Offhand I would think that you would
need...<br>
<br>
- 2 boxes for the oVirt manager<br>
- Clustering software for the manager to facilitate an
active/passive setup.<br>
- UPSs (at *least* 2) which can be controlled by clustering
software. Why? Most clustering SW require a fence
device. These
will be your fence devices.<br>
- 2 boxes for your hypervisors (ie. ovirt-nodes). This will
facilitate fail-over from one node to the other.<br>
<br>
HA isn't cheap and can't usually be done on 2 boxes, IMO unless
you're failing over a single app.<br>
<br>
<br>
<blockquote
cite="mid:CAJZXTno2Qqzknhr+UqHmG6r7o1JCTn-M-en01yWC=M5Gz5x=mg@mail.gmail.com"
type="cite">
<br>
Thank you!<br>
<br>
Nic<br>
<br>
PS. Could oVirt be integrated into ovirt-node on every server?<br>
<br>
<br>
<br>
<div class="gmail_quote">On Sat, Sep 22, 2012 at 2:16 PM, Keith
Robertson <span dir="ltr"><<a
moz-do-not-send="true"
href="mailto:kroberts@redhat.com"
target="_blank">kroberts(a)redhat.com</a>&gt;</span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000">
<div class="im">
<div>On 09/22/2012 01:09 PM, Nicolas Chenier wrote:<br>
</div>
<blockquote type="cite">Hi Alan,<br>
<br>
I have oVirt running in a VM off my Desktop (Fedora 17
w/ KVM & Virt-Manager) off my iSCSI NAS. <br>
<br>
I've attached Server #1 as my first host (it's running
ovirt-node).<br>
<br>
In the process of setting up my storage domains. I have
a few questions to the experts out there:<br>
<br>
1) How do I add my CD .ISOs to setup new VMs? Create
iSCSI storage domain? But then how do I copy my ISOs to
it?<br>
</blockquote>
</div>
Create an ISO storage domain and use the ovirt-iso-uploader
to add your ISOs and .vfd files into that domain.
<div class="im"><br>
<blockquote type="cite"><br>
2) Can I run my oVirt VM from ovirt-node machine,
without running it in oVirt (ie. setup iSCSI in
virt-manager (as it is now) and run oVirt from
virt-manager... then I can manage my hosts through that
ovirt VM?<br>
</blockquote>
</div>
Huh? You could run the oVirt Manager from a VM managed by
virt-manager... yes. Running the oVirt manager inside a VM
on a hypervisor (ie. ovirt-node) controlled by that same
manager isn't supported AFAIK because the mgr. could get
fenced. <br>
<br>
To summarize, you can pretty much run the oVirt manager on
any supported OS as long as that OS instance isn't running
on a hypervisor (ie. ovirt-node) controlled by *that*
manager.<br>
<br>
If you haven't noticed the vocabulary to describe the
various components can get a little confusing. ;) <br>
<br>
<br>
<blockquote type="cite">
<div class="im"> <br>
Not sure if I'm making myself clear... but I'm making
progress. I think as long as you are not managing your
oVirt vm through oVirt itself, the solution should work
fine! Just trying to see if I can get that done on an
ovirt-node machine...<br>
<br>
Thank you,<br>
<br>
Nic<br>
<br>
<br>
<div class="gmail_quote">On Fri, Sep 21, 2012 at 3:31
PM, Alan Johnson <span dir="ltr"><<a
moz-do-not-send="true"
href="mailto:alan@datdec.com"
target="_blank">alan(a)datdec.com</a>&gt;</span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div class="gmail_quote">
<div>On Wed, Sep 12, 2012 at 9:22 PM, Nicolas
Chenier <span dir="ltr"><<a
moz-do-not-send="true"
href="mailto:dascope@gmail.com"
target="_blank">dascope(a)gmail.com</a>&gt;</span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0
0 0 .8ex;border-left:1px #ccc
solid;padding-left:1ex">
<div>I was under the impression that
my oVirt VM would show up in oVirt and that
I could manage it through there...</div>
<div> </div>
<div>What you're saying is that I should just
run it seperatly and not manage it with
itself (oVirt)? keep it on my shared storage
so that I can run it off any of the 2
servers? But not manage it with oVirt
(itself). I think I'm starting to get it
now...</div>
<div> </div>
<div>I really appreciate your help!</div>
<div> </div>
<div>Nic</div>
</blockquote>
<div><br>
</div>
</div>
<div>Nic, how did you make out with this? I'm
looking to do the same thing and am wondering if
there is any risk in running the engine on a VM
managed by the same engine, as you were
suggesting before. Did you give this a
shot?</div>
<div><br>
</div>
<div>Itamar, why did you steer Nic away from
this?</div>
<font color="#663366"><font
face="verdana,sans-serif"><br
clear="all">
</font></font>_______________<span><font
color="#888888"><br>
Alan Johnson<br>
<a moz-do-not-send="true"
href="mailto:alan@datdec.com"
target="_blank">alan(a)datdec.com</a><br>
<div> </div>
</font></span></div>
</blockquote>
</div>
<br>
<br>
<fieldset></fieldset>
<br>
</div>
<div class="im">
<pre>_______________________________________________
Users mailing list
<a moz-do-not-send="true" href="mailto:Users@ovirt.org"
target="_blank">Users(a)ovirt.org</a>
<a moz-do-not-send="true"
href="http://lists.ovirt.org/mailman/listinfo/users"
target="_blank">http://lists.ovirt.org/mailman/listinfo/user...
</pre>
</div>
</blockquote>
<br>
<br>
</div>
</blockquote>
</div>
<br>
</blockquote>
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