[libvirt-users] [libvirt] migrate qemu domains

[Yin Olivia-R63875]

Hi Cindy,

Thanks for your reply.

Since LXC is an independent driver in libvirt, I guess to migrate LXC domains 
doesn't depend on external program.
But it failed with different error messages on source and destination nodes.

1) Migrate the virtual machine to the destination host
root at ppc-host1:~# virsh -c lxc:/// list --all
Id    Name                           State
----------------------------------------------------
 3396  vm1                            running
root at ppc-host1:~# virsh migrate vm1 lxc+tls://10.193.20.181/
error: failed to get domain 'vm1'
error: Domain not found: no domain with matching name 'vm1'

2) Migrate the virtual machine back
root at ppc-host2:~# virsh -c lxc+tls://root@10.193.20.109/ list --all
Id    Name                           State
----------------------------------------------------
 3396  vm1                            running
root at ppc-host2:~# virsh -c lxc+tls://10.193.20.109/ migrate vm1 lxc:///
error: this function is not supported by the connection driver: virDomainMigrate2


Do you have any idea?


Best Regards,
Olivia


> -----Original Message-----
> From: Li Zhang [mailto:zhlcindy at gmail.com]
> Sent: Friday, March 29, 2013 12:02 PM
> To: Yin Olivia-R63875
> Cc: libvir-list at redhat.com; libvirt-users at redhat.com
> Subject: Re: [libvirt] migrate qemu domains
> 
> On 2013年03月28日 20:06, Yin Olivia-R63875 wrote:
> > Hi,
> >
> > I tried to migrate qemu domains between same two Freescale PPC platforms.
> >
> > 1) Migrate test domain from Host1(10.193.20.109) to Host2(10.193.20.181).
> > root at ppc-host1:~# virsh migrate test qemu+tls://10.193.20.181/system
> > or root at ppc-host2:~# virsh -c qemu+tls://10.193.20.109/system migrate
> > test qemu:///system
> >
> > I waited for a while and finally got error message as below:
> > error: Unable to read from monitor: Connection reset by peer
> I think debug log should be useful.
> > Exactly, when waiting (I guess during migration), the migrated domain
> > is pasued on both source and destination nodes.
> > root at ppc-host1:~# virsh -c qemu:///system list --all
> >   Id    Name                           State
> > ----------------------------------------------------
> > 5     test                           paused
> >
> >
> > And meanwhile, the destination domain is also paused when waiting
> > root at ppc-host2:~# virsh -c qemu:///system list --all
> >   Id    Name                           State
> > ----------------------------------------------------
> > 2     test                           paused
> >
> > Finally, the migrated domain on source node is shut off.
> > root at ppc-host1:~# virsh -c qemu:///system list --all
> >   Id    Name                           State
> > ----------------------------------------------------
> > -     test                           shut off
> >
> >
> > But can't find any domain on destination node any longer.
> > root at ppc-host2:~# virsh -c qemu:///system list --all
> >   Id    Name                           State
> > ----------------------------------------------------
> >
> >
> > As I know qemu-system-ppc doesn't support live migration on Freescale PPC
> platform yet.
> > My question is whether it depends on qemu implementation to migrate qemu
> hypervisor with libvirt?
> Ah, I think it needs QEMU's support. :)
> 
> >
> > >From the above experiment, it seemed that migration happened but not
> succeeded finally.
> >
> > Best Regards,
> > Olivia
> >
> >
> > --
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>