2012/12/6 Gao Yongwei <itxx00@gmail.com>
2012/12/6 zhijun liu <lzjun567@gmail.com>
2012/12/6 Eric Blake <eblake@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_migra...
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