[libvirt-users] libvirt migrate error

[Gao Yongwei]

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 .
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