[Qemu-devel] problem in setting up vmchannel with libvirt

[Qemu-devel] problem in setting up vmchannel with libvirt

[will]

Hi,
I am trying to set up vmchannel between the host and guest os.

However, "sudo virsh start vm1" always gave me this error:
*************************************************************
error: Failed to start domain vm1
error: internal error Process exited while reading console log output: char
device redirected to /dev/pts/5
bind(unix:/tmp/foo): Permission denied
chardev: opening backend "socket" failed
*************************************************************

Related xml is:
*************************************************************
<channel type='unix'>
  <source mode='bind' path='/tmp/foo'/>
  <target type='virtio' name='channel.port.0'/>
  <address type='virtio-serial' controller='0' bus='0' port='1'/>
</channel>
*************************************************************

I can succeed while I manually run the guest os by:
*************************************************************
sudo kvm -device virtio-serial \
-chardev socket,path=/tmp/foo,server,nowait,id=foo \
-device virtserialport,chardev=foo,name=org.fedoraproject.port.0\
/path/to/vm1.img
*************************************************************

I also noticed that libvirt is able to create socke
/var/lib/libvirt/qemu/vm1.monitor every time. I can't win even I change the unix
socket path to "/var/lib/libvirt/qemu/foo"


Any information will be appreciated!

Re: [Qemu-devel] problem in setting up vmchannel with libvirt

[Dave Allan]

On Tue, Nov 29, 2011 at 09:55:32AM +0000, will wrote:
> Hi,
> I am trying to set up vmchannel between the host and guest os.
> 
> However, "sudo virsh start vm1" always gave me this error:
> *************************************************************
> error: Failed to start domain vm1
> error: internal error Process exited while reading console log output: char
> device redirected to /dev/pts/5
> bind(unix:/tmp/foo): Permission denied
> chardev: opening backend "socket" failed
> *************************************************************
> 
> Related xml is:
> *************************************************************
> <channel type='unix'>
>   <source mode='bind' path='/tmp/foo'/>
>   <target type='virtio' name='channel.port.0'/>
>   <address type='virtio-serial' controller='0' bus='0' port='1'/>
> </channel>
> *************************************************************
> 
> I can succeed while I manually run the guest os by:
> *************************************************************
> sudo kvm -device virtio-serial \
> -chardev socket,path=/tmp/foo,server,nowait,id=foo \
> -device virtserialport,chardev=foo,name=org.fedoraproject.port.0\
> /path/to/vm1.img
> *************************************************************
> 
> I also noticed that libvirt is able to create socke
> /var/lib/libvirt/qemu/vm1.monitor every time. I can't win even I change the unix
> socket path to "/var/lib/libvirt/qemu/foo"
> 
> 
> Any information will be appreciated!
> 
> 

Try the libvirt-users list for questions like this one:

libvirt-users@redhat.com

Dave