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check the vnc port agsigned for the wm on the destination node weather used by the other, base the log, the 5900 port on the destination node is occupied by another.

the min vnc port used by libvirt is 5900 by default.

ps:if use vmware ESXi hypervisor hot migrate can success weather the vncport of the vm  used or not on the destination node. 
-----原信息-----
发自： Eric Luo
发送：  2012/05/29, 17:44 
收件人: openstack at lists.launchpad.net
主题： Re: [Openstack] [OpenStack][Nova] live migration with libvirt error ---inet_listen_opts: bind Cannot assign requested address---is this a bug or something?..


>
> Hello ,all
> I am doing live-migration with 3 nodes installation .Everything is set
> just as the official document instructed here:
> http://docs.openstack.org/trunk/openstack-compute/admin/content/configuring-live-migrations.html
>
>
> When I use the command " nova live-migration vm1 HostC" , nova wouldn't
> give me any error information.But I checked the vm with "nova show
> vm1",and found the migration is not succeeded, *vm1* is still running on
> the source compute node .I checked the /var/log/libvirt/libvirtd.log ,and
> found the following error:
>
>
> 2012-05-29 03:43:47.543+0000: 8875: error :
> virNetClientProgramDispatchError:174 : internal error process exited while
> connecting to monitor: char device redirected to /dev/pts/1
> inet_listen_opts: bind(ipv4,192.168.0.205,5900): Cannot assign requested
> address
> inet_listen_opts: FAILED
>
> 2012-05-29 06:30:29.828+0000: 8875: error :
> virNetClientProgramDispatchError:174 : Unable to read from monitor:
> Connection reset by peer
>
>
> if , I disabled the vnc by commenting out all the vnc related lines in
> /etc/nova/nova.conf on both compute nodes ,and launched a new instance *vm2
> *,then vm2 can be migrated between the two compute nodes freely without
> any error.
>
> So I guess there may be some problems with the vnc when doing live
> migration in nova? Also ,I googled and found a bug report here ,please
> check it out:
> https://bugzilla.redhat.com/show_bug.cgi?format=multiple&id=703851
>
> I don't know whether it is related to my problems here .Please tell me if
> it is a bug of nova or just something I did wrong.
>
> Thank you in advance! .
>
> Eric Luo.
>
>
> --
> Stay with me,stay with my heart,honey.....
>
> --
> Stay with me,stay with my heart,honey.....
>
>

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