Patch Re: [Libvir] save and restore guest

[Farkas Levente]

Daniel P. Berrange wrote:
> On Fri, Oct 19, 2007 at 01:56:10PM +0200, Farkas Levente wrote:
>> Farkas Levente wrote:
>>> Daniel P. Berrange wrote:
>>>> The save/restore capability is currently only available in the KVM-ified
>>>> version of QEMU. We could make it try to save, and failing that destroy
>>>> the guest. The xendomains scripts isn't a good model to emulate though.
>>>> The autostart/kill functionality is part of the libvirt daemon itself. Any
>>>> save/restore capability would be best integrated there
>>> for those who like to save and restore guest at libvirtd stop and start
>>> i attached a patch we use to for it. it's based on xen's sripts.
>>> LIBVIRTD_AUTO_ONLY still not implemented but the sysconfig file already
>>> contains it. if you like to set the default behavior to the current then
>>> set LIBVIRTD_RESTORE to false.
>>> imho it'd be useful to include in the upstream libvirtd too.
>>>
>> and the patch:-)
> 
> As I mentioned above, doing this in the init script is a bad idea because
> it does not interact well with domain autostart. The libvirt dameon itself
> will autostart domains when it starts. So you may be saving the guests
> at shutdown, but at the next boot any which are marked autostart will be
> started fresh & the subsequent restore for them will fail since they are
> already running. Doing this all correctly requires doing it in the daemon
> not the initscript.

yes, but currently it's not implemented:-( but if you don't autostart
any guest (which is the current default) my patch at least working until
it'll be implemented.

-- 
  Levente                               "Si vis pacem para bellum!"