[Users] Choosing which network to run VM migration on ovirt 3.1

[Dan Kenigsberg]

On Mon, Jan 07, 2013 at 03:23:41PM +0200, Yuval M wrote:
> after a bit of playing with the system, I found a nice workaround:
> I added a host route on each host:
> 
> # route add -host 10.100.101.101 gw 172.22.22.1
> and on the other one:
> # route add -host 10.100.101.100 gw 172.22.22.2
> 
> where 10.100.101/24 is the slow network and 172.22.22/24 is the fast
> network.
> migration now works through the fast link, with nothing changed in ovirt's
> configuration.

Nice hack! But it means that all IP traffic between these two hosts is
routed over Infiniband. That's a Good Thing in your use case, but may
confuse other setups.

I would like to suggest a brand new "migration network" role in
http://www.ovirt.org/Features/Migration_Network to provide
managenet/migration network separation.