Re: [libvirt-users] about guest live migration configuration changes persistence ..
Hi,
Effectively, I use unix socket as backend.
Thx for help.
J.P.
-----Message d'origine-----
De : Michal Privoznik [mailto:mprivozn@redhat.com]
Envoyé : jeudi 3 septembre 2015 11:33
À : Jean-Pierre Ribeauville; libvirt-users(a)redhat.com
Objet : Re: [libvirt-users] about guest live migration configuration changes persistence
..
On 03.09.2015 11:18, Jean-Pierre Ribeauville wrote:
Hi,
Thanks for infos.
My concern is the following :
In order to establish datas exchanges between hosts and guest , I'll add a channel
device to a running Guest ( as I learned from you that it's possible to do that
without stopping the Guest).
When the guest migrates to another host , this one must be able to retrieve the channel
device parameters to be able to dialog with the migrated guest.
I plan to use dumpxml to retrieve these infos.
Will these infos be updated on the second host where the guest has migrated ?
Sure. Otherwise migration would be broken in general. I mean, if guest uses say tap0 on
the source, the device may already have been taken on the destination. Libvirt must then
find/create another free device for the migrated domain to use, e.g. tap1. It's the
same with other devices.
Even consoles. But if you're using channel device (assuming you're using a unix
socket as backend (=part visible within the host)), the path to the socket should be
preserved.
Michal