[libvirt] Live migration woes

[Thomas Treutner]

On Friday 05 February 2010 21:21:32 Thomas Sjolshagen wrote:
> Quoting Thomas Treutner <thomas at scripty.at>:
> > Hi,
> >
> > is anyone using libvirt-git and qemu-kvm post-0.11 and can live migrate
> > VMs successfully for- and backwards? qemu-kvm-0.11 seems to be the latest
> > release were live migration works, and I'm trying to figure out if its a
> > kvm or libvirt problem, since there were other things (balloon parameter
> > f.e.) that were changed with qemu-kvm-0.12 and caused troubles when using
> > libvirt.
>
> Yes.
>
> I'm using the virt-preview repo (rawhide) and I just noticed, today,
> after re-upgrading to 0.12.2-5 (since -4 has a rather nasty IO problem
> for virtio devices against raw image files) that my live-migrations
> fail with the following error message on the destination system (i.e.
> the system the I'm trying to migrate to):
>
> /var/log/libvirt/qemu/<guest>.log:
> Unknown savevm section -2038417646
> load of migration failed

I don't see that in the logs. My migrations "succeed", but at the dst, the VM 
immediately crashes, with no chance of getting some useful debug output so 
far.

>
> Also, in the same log file, I'm seeing:
> Warning: vlan 0 with no nics
> Option 'ipv4': Use 'on' or 'off'
> Failed to parse "yes" for "dummy.ipv4"
>
> But that may not be related to the migration failing.

Yeah, that's familiar to me:

22:09:40.409: debug : qemuSecurityDACSetProcessLabel:411 : Dropping privileges 
of VM to 0:0
char device redirected to /dev/pts/3
Warning: vlan 0 with no nics
Option 'ipv4': Use 'on' or 'off'
Failed to parse "yes" for "dummy.ipv4"


-t