all-in-one install via oVirt Node

[Simon Grinberg]

----- Original Message -----
> From: "Perry Myers" <pmyers at redhat.com>
> To: arch at ovirt.org
> Cc: "Joseph Boggs" <jboggs at redhat.com>
> Sent: Tuesday, February 21, 2012 9:30:50 PM
> Subject: all-in-one install via oVirt Node
> 
> I believe folks have already gotten an all-in-one install working via
> a
> Fedora 16 host which runs the oVirt Engine infrastructure and vdsm
> side
> by side, so that the same host running OE can also run VMs under OE.
> 
> This conversation came up on users list from the perspective of oVirt
> Node:
> http://lists.ovirt.org/pipermail/users/2012-February/000702.html
> 
> It doesn't make sense to install OE onto oVirt Node itself.  The lack
> of
> a full OS and stateless FS would make that a waste of effort :)
> 
> However, what about doing the following:
> 
> * Boot oVirt Node, do basic config (install to disk, networking)
> * Start a VM specifically to run oVirt Engine.  This VM would need to
>   run off of either:
>   + dedicated local storage (/data partition, so local disk must be
>     large enough)
>   + an iSCSI or FC LUN, but this LUN should never be part of the
>   normal
>     set of LUNs that oVirt Engine would use for other VMs
> * Once this VM is up and running and oVirt Engine is up then you can
>   register oVirt Node to that Engine
> * You'd want to make sure that OE is not able to fence the node it is
>   running on, and the resources needed by the OE VM must be
>   subtracted
>   from the total available resources (would this be done
>   automatically
>   already?)
> 
> To support this, I think we'd just need to provide an easy way for an
> oVirt Node user to start up that mgmt VM outside of normal OE
> control.
> Since libvirt is already present and we have a simple TUI version of
> virt-manager, maybe we can utilize that interface to do this.
> 
> Of course, once the oVirt Node is registered with OE, the local
> libvirt/virt-manager TUI should not be used for anything except for
> management of the OE VM itself.
> 
> Would something like this be desirable for PoC or demo purposes?  If
> folks don't think it's a good idea, I'm happy to not do it but
> curious
> as to what people think.

It's fairly trivial to install OE on a full fedora host so what is the purpose of this POC/Demo?

Usually if it's for demo purposes or just to save on hardware while you are testing oVirt then you'll probably want to use the Desktop mode otherwise you'll require another machine as the client (which rules out OVirt node)

If it's as POC towards a self hosted OE (otherwise I don't see the motivation to move to all in one oVirt node) then you'll probably want to stick to shared storage and add more staff like some kind of script running on the nodes ensuring that the OE VM will be started on any node. It's not that trivial :)




 
> Perry
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