[libvirt] Migrate not running guests
Hugh O. Brock
hbrock at redhat.com
Tue Jul 6 13:07:18 UTC 2010
On Mon, Jul 05, 2010 at 08:37:33PM +0200, Juan Quintela wrote:
>
> Hi
>
> In an exercise to use more libvirt, I am trying to use libvirt with my
> normal use. First, I will explain how I normally run my guests.
>
> I install guests on a machine with virt-install <....>
> I store all my guests images in a shared directory that is mounted in
> all my hosts.
>
> Now, it is trivial for me to launch qemu-kvm <options> on any machine,
> it don't matters if I have to use a rhel5, rhel6, fedora13 host.
> Everything works as expected.
>
> Except for the little fact that I have to remember the whole command
> line when I go from one machine to other, to use ide/virtio/rtl8139/....
> You get the idea. And thing got worse the more guests that I have.
>
> Now I can run virt-manager on my desktop (machine A).
> Connect to host B. And launch my guests VM1 (on host B). No problem so far.
> I can indeed migrate my guests to machine C. No problem so far.
>
> And now I can start my guest VM1 in both host B and host C. It is there
> on virt-manager, one click away of launching.
>
> The functionality that I would really like is a "way" to store my guest
> information on my desktop (machine A), and be able to launch the guest
> on any host. I.e. a menu option when I click on the guest, that let me
> launch it in a different host, not in the one that it is defined.
>
> If that is difficult to implement for now, a "migrate" for a shut off
> guest will do by now. It should be something like
> virsh dumpxml foo > foo.xml
> virsh define foo.xml
>
> (this is the way that I do it by hand now).
>
> Why do I need this? because I have hosts with RHEL5/RHEL6/F13/....
>
> And just now, I have to reinstall, do the previous dumpxml/define each
> time that I have to reproduce one bug in one host or another. To make
> things worse, sometimes RHEL5.4 and RHEL6.0 xml's are not completely
> compatible and I have to fix it by hand.
>
> Any better ideas about how to do this?
I think this is a great idea... we would simply need to give
virt-manager the ability to start transient guests off a local libvirt
XML definition. I don't even think this would require that much code,
especially if we didn't get worked up about making it super-robust
(i.e. if the nfs path in your guest definition is wrong for the host
you've tried to run your guest on, tough luck).
Cole? Dan?
Take care,
--Hugh
>
> --
> libvir-list mailing list
> libvir-list at redhat.com
> https://www.redhat.com/mailman/listinfo/libvir-list
More information about the libvir-list
mailing list