[libvirt-users] libvirt migrate error

[zhijun liu]

2012/12/6 Gao Yongwei <itxx00 at gmail.com>

>
>
> 2012/12/6 zhijun liu <lzjun567 at gmail.com>
>
>>
>>
>> 2012/12/6 Eric Blake <eblake at redhat.com>
>>
>>> On 12/05/2012 12:05 PM, zhijun liu wrote:
>>> > hi,all
>>> >
>>> > when I try to migrate `vm0` from (192.168.1.102) to another
>>> > host(192.168.1.200), the name `ubuntu1204` is 192.168.1.200's hostname.
>>> >
>>> > command is :
>>> >
>>> > `sudo virsh migrate  --live vm0 qemu+tcp://192.168.1.200/system`<http://192.168.1.200/system>
>>> >
>>> > the error is : unable to connect to server at 'ubuntu1204:49157':
>>> > Connection refused.
>>>
>>> Indeed, when using native migration, you have to open a rather large
>>> range of ports that qemu might want to use.
>>>
>>>
>>> http://wiki.libvirt.org/page/FAQ#What_setup_is_required_for_QEMU.2FKVM_migration.3F
>>>
>>> >
>>> > however,when I try to virsh connect  to 192.168.1.200 by tcp is no
>>> problem.
>>>
>>> http://libvirt.org/migration.html gives more details on how to do live
>>> migration; in particular, you may want to try using --p2p to avoid
>>> having to open any ports for qemu.
>>>
>>> >
>>> > I dont know what the port 49157?how to fix it?
>>>
>>> Otherwise, figure out how to add open ports to your firewall; but as I'm
>>> not an Ubuntu user, I can't really say how to do that on your system.
>>>
>>
>> thanks, Blake. when I using --p2p ,the problem still exsit.
>>
> i think you could use ss command or netstat command when migrate begin,to
> check that which ports are opened,or which ports want to connect to, then
> check your firewall like iptables .
>
>> at the same time,another question is why the content of  error  " unable
>> to connect to server at 'ubuntu1204:49157':" displayed hostname
>> 'ubuntu1204' instead of  ip '192.168.1.200'.   beause I try to ping
>> hostname `ubuntu1204` ,show `ping: unknown host ubuntu1204` ,only support
>> ping `ip`.
>>
>>>
>>> if you doesnot have a nameserver,you could write the hostname and ip
> host /etc/hosts,and change the server's hostname .
>

when I operated in CentOS,the error like following:
error: Unable to resolve address '$hostname' service '49158': Name or
service not known
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