Re: [libvirt] Libvirt Support Virtio-serail
On Mon, May 14, 2012 at 10:03:11AM +0000, Pankaj Rawat wrote:
Actually I wanted to have private communication channel b/w host and
guest
By default I cannot have multiple console on guest through virsh console guestname
( they all are dependent on each other , if I execute a command on one shell its
output is reflected on all of them ).
I wanted to login into guest from multiple shells(and the console should be independent
of each other)
If you want multiple interactive consoles, you need to configure
multiple <console> devices.
Virtio-serial have this feature ,I have gone through various install
option on web , but they don't seem to work.
virtio-serial is not intended for consoles - it is for application
communication channels.
Our kernel version for host and guest is 2.6.32-220.4.1.el6.x86_64
We goes through the mentioned link
And edit our xml file by adding
<channel type='pty'>
<target type='virtio'
name='arbitrary.virtio.serial.port.name'/>
<address type='virtio-serial' controller='0' bus='0'
port='1'/>
</channel>
Then we tried to access the channel device through virsh console guest_name dev_name
It gives error :-
# virsh console serial vport0p1
Connected to domain serial
Escape character is ^]
error: internal error cannot find character device vport0p1
The 'virsh consolve' command is only intended for use with interactive
consoles for administrators. As such it completely ignores any <channel>
devices which are for non-interactive use. So what you see here is
normal. The vkirtio serial port is definitely available for use by
your application
What you actually want is to configure multiple <consolke> devices
<console type='pty'>
<target type='virtio'/>
</console>
<console type='pty'>
<target type='virtio'/>
</console>
<console type='pty'>
<target type='virtio'/>
</console>
<console type='pty'>
<target type='virtio'/>
</console>
They will be given names console0, console1, etc so with virsh console
# virsh console --device console1 serial
Daniel
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