Re: [Qemu-devel] Fail to start 2nd guest

[Xiong Zhou]

On Mon, Feb 27, 2017 at 10:11:04AM +0000, Stefan Hajnoczi wrote:
> On Mon, Feb 27, 2017 at 05:40:50PM +0800, Xiong Zhou wrote:
> > It worked fine on Linus tree commit:
> >   7bb0338 Merge tag 'rodata-v4.11-rc1' of git://git.kernel.org/pub/scm/..
> > 
> > failed to start 2nd domain on this commit:
> > 37c8596 Merge tag 'tty-4.11-rc1' of git://git.kernel.org/pub/scm/..
> > (this commit probably is not the first bad, i didn't do the bisecting)
> > 
> > 
> > sh-4.2# uname -r
> > 4.10.0-master-37c8596+
> > sh-4.2# rpm -qv qemu
> > qemu-2.0.0-1.el7.6.x86_64
> > sh-4.2# ps ajxf | grep qemu
> > ...
> > sh-4.2# virsh list
> >  Id    Name                           State
> > ----------------------------------------------------
> >  1     73h                            running
> > 
> > sh-4.2# virsh start 73us
> > error: Failed to start domain 73us
> > error: internal error: qemu unexpectedly closed the monitor: 
> > ((null):11497): Spice-Warning **: reds.c:2499:reds_init_socket: listen: 
> > Address already in use
> > 2017-02-27T09:33:42.335708Z qemu-kvm: failed to initialize spice server
> 
> The error message says that the spice remote desktop cannot listen on
> -spice port=5900,addr=127.0.0.1.
> 
> Did you hardcode port 5900 in the domain XML?  That could explain why
No.
> the second guest fails to launch - you need to use unique port numbers
> or let libvirt automatically assign them.  Check the domain XML:
> 
>   <graphics type='spice' port='-1' tlsPort='-1' autoport='yes'>

It looks like:

    <graphics type='spice' autoport='yes'>
      <listen type='address'/>
      <image compression='off'/>
    </graphics>


> 
> Another possibility is that a process running on the host is already
> using port 5900.  Perhaps a guest or VNC server that was launched
> outside of libvirt?  You can check this with:
> 
>   netstat -alpn | grep 5900
# netstat -alpn | grep 5900
tcp        0      0 127.0.0.1:5900          0.0.0.0:*               LISTEN      
11065/qemu-kvm      
> 
> Stefan