Re: [libvirt-users] libvirt migrate error

2012/12/6 zhijun liu <lzjun567(a)gmail.com&gt; > > > 2012/12/6 Eric Blake <eblake(a)redhat.com&gt; > >> 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_mi... >> >> > >> > 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 .