libvirt users - Aug 2011 - Problem to migrate virtual machine between two hosts with same uuid

hi at all,
i'm trying to migrate a vm between two host but fails, this is what
I did:

virsh # start win2008
Domain win2008 started

virsh # list
 Id Name                 State
----------------------------------
  1 win2008              running

virsh # migrate --live win2008 qemu+ssh://host2/system
error: internal error Attempt to migrate guest to the same host 
00010203-0405-0607-0809-0a0b0c0d0e0f

if I type on both hosts:

host1
virsh # sysinfo

.......
  <system>
    <entry name='manufacturer'>Supermicro</entry>
    <entry name='product'>X9SCL/X9SCM</entry>
    <entry name='version'>0123456789</entry>
    <entry name='serial'>0123456789</entry>
    <entry
name='uuid'>00010203-0405-0607-0809-0A0B0C0D0E0F</entry>
    <entry name='sku'>To be filled by O.E.M.</entry>
    <entry name='family'>To be filled by O.E.M.</entry>
  </system>
........
 
 
host2
virsh # sysinfo

.......
  <system>
    <entry name='manufacturer'>Supermicro</entry>
    <entry name='product'>X9SCL/X9SCM</entry>
    <entry name='version'>0123456789</entry>
    <entry name='serial'>0123456789</entry>
    <entry
name='uuid'>00010203-0405-0607-0809-0A0B0C0D0E0F</entry>
    <entry name='sku'>To be filled by O.E.M.</entry>
    <entry name='family'>To be filled by O.E.M.</entry>
  </system>

........

The problem seems to be the same uuid on both hosts, 

1) is correct?
2) if is correct, how I can resolve?

Thanks a lot in advance

Umberto




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On Tue, Aug 23, 2011 at 01:08:29PM +0200, info at umbertocarrara.it
wrote:
> hi at all,
> i'm trying to migrate a vm between two host but fails, this is what
> I did:
> 
> virsh # start win2008
> Domain win2008 started
> 
> virsh # list
>  Id Name                 State
> ----------------------------------
>   1 win2008              running
> 
> virsh # migrate --live win2008 qemu+ssh://host2/system
> error: internal error Attempt to migrate guest to the same host 
> 00010203-0405-0607-0809-0a0b0c0d0e0f
> 
> if I type on both hosts:
> 
> host1
> virsh # sysinfo
> 
> .......
>   <system>
>     <entry name='manufacturer'>Supermicro</entry>
>     <entry name='product'>X9SCL/X9SCM</entry>
>     <entry name='version'>0123456789</entry>
>     <entry name='serial'>0123456789</entry>
>     <entry
name='uuid'>00010203-0405-0607-0809-0A0B0C0D0E0F</entry>
>     <entry name='sku'>To be filled by O.E.M.</entry>
>     <entry name='family'>To be filled by O.E.M.</entry>
>   </system>
> ........
>  
>  
> host2
> virsh # sysinfo
> 
> .......
>   <system>
>     <entry name='manufacturer'>Supermicro</entry>
>     <entry name='product'>X9SCL/X9SCM</entry>
>     <entry name='version'>0123456789</entry>
>     <entry name='serial'>0123456789</entry>
>     <entry
name='uuid'>00010203-0405-0607-0809-0A0B0C0D0E0F</entry>
>     <entry name='sku'>To be filled by O.E.M.</entry>
>     <entry name='family'>To be filled by O.E.M.</entry>
>   </system>
> 
> ........
> 
> The problem seems to be the same uuid on both hosts, 
> 
> 1) is correct?
Yes, your hardware vendor is being very very bad :-(
> 2) if is correct, how I can resolve?
You could complain to the hardware vendor, but I rather doubt
that they would ever do anything about it.

So, libvirtd provides a way to override the default host UUID,
by setting 'host_uuid' in /etc/libvirt/libvirtd.conf, which
should make the migration sanity check pass.

Daniel
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