Xen users - Dec 2010 - How to get remote access to domU console using VNC？

Hi all,
    I installed a paravirt CentOS 5.4 domU on a CentOS 5.4 dom0 environment.
I compiled the domU kernel with framebuff console. But I couldn’t using VNC
to connect to the domU console. The kernel boot message could print on the
vnc console. But after the boot process, the console appears on the text
console in dom0 again.

The configfile is as follows:



vfb = [ ''type=vnc,vnclisten=0.0.0.0,vncdisplay=22'' ]

vnc=1

sdl=0



Any one knows the problem?  and how to enable vnc console?



Best Wishes

Qiang Ma


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On Mon, Dec 6, 2010 at 3:03 PM, ma qiang <maqiang1984@gmail.com>
wrote:
> Hi all,
>     I installed a paravirt CentOS 5.4 domU on a CentOS 5.4 dom0
environment.
> I compiled the domU kernel with framebuff console. But I couldn’t using VNC
> to connect to the domU console. The kernel boot message could print on the
> vnc console. But after the boot process, the console appears on the text
> console in dom0 again.

What does domU''s /boot/grub/menu.lst look like (look for line with
"console" in particular)?
What does domU''s /etc/inittab look like (look for lines with
"tty" in it)

-- 
Fajar

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* /boot/grub/menu.lst printed as below:*

default=0
timeout=5
splashimage=(hd0,1)/grub/splash.xpm.gz
hiddenmenu
title CentOS (2.6.18.8-xenU)
        root (hd0,1)
        kernel /boot/vmlinuz-2.6.18.8-xenU ro root=/dev/sda2
        initrd /boot/initrd-2.6.18.8-xenU.img

*/etc/inittab printed as below:*
*
*
ca::ctrlaltdel:/sbin/shutdown -t3 -r now

# When our UPS tells us power has failed, assume we have a few minutes
# of power left.  Schedule a shutdown for 2 minutes from now.
# This does, of course, assume you have powerd installed and your
# UPS connected and working correctly.
pf::powerfail:/sbin/shutdown -f -h +2 "Power Failure; System Shutting
Down"

# If power was restored before the shutdown kicked in, cancel it.
pr:12345:powerokwait:/sbin/shutdown -c "Power Restored; Shutdown
Cancelled"

# Run gettys in standard runlevels
co:2345:respawn:/sbin/agetty xvc0 9600 vt100-nav
#1:2345:respawn:/sbin/mingetty tty1
#2:2345:respawn:/sbin/mingetty tty2
#3:2345:respawn:/sbin/mingetty tty3
#4:2345:respawn:/sbin/mingetty tty4
#5:2345:respawn:/sbin/mingetty tty5
#6:2345:respawn:/sbin/mingetty tty6

# Run xdm in runlevel 5
x:5:respawn:/etc/X11/prefdm -nodaemon

Thanks a lot.

Best Wishes
Qiang Ma

On Mon, Dec 6, 2010 at 4:59 PM, Fajar A. Nugraha <list@fajar.net> wrote:
> On Mon, Dec 6, 2010 at 3:03 PM, ma qiang <maqiang1984@gmail.com>
wrote:
> > Hi all,
> >     I installed a paravirt CentOS 5.4 domU on a CentOS 5.4 dom0
> environment.
> > I compiled the domU kernel with framebuff console. But I couldn’t
using
> VNC
> > to connect to the domU console. The kernel boot message could print on
> the
> > vnc console. But after the boot process, the console appears on the
text
> > console in dom0 again.
>
>
> What does domU''s /boot/grub/menu.lst look like (look for line with
> "console" in particular)?
> What does domU''s /etc/inittab look like (look for lines with
"tty" in it)
>
> --
> Fajar
>

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Xen-users mailing list
Xen-users@lists.xensource.com
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On Tue, Dec 7, 2010 at 7:54 AM, ma qiang <maqiang1984@gmail.com>
wrote:
> #1:2345:respawn:/sbin/mingetty tty1
uncomment this line, and reboot

-- 
Fajar

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I have tried uncomment this line and reboot, but it doesn''t work.



On Tue, Dec 7, 2010 at 9:55 AM, Fajar A. Nugraha <list@fajar.net> wrote:
> On Tue, Dec 7, 2010 at 7:54 AM, ma qiang <maqiang1984@gmail.com>
wrote:
> > #1:2345:respawn:/sbin/mingetty tty1
>
> uncomment this line, and reboot
>
> --
> Fajar
>

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Xen-users@lists.xensource.com
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On Tue, Dec 7, 2010 at 9:34 AM, ma qiang <maqiang1984@gmail.com>
wrote:
> I have tried uncomment this line and reboot, but it doesn''t work.
It should work.

Since you mention you already see the kernel boot message, you might
want to try replacing "tty1" with "console" on /etc/inittab
and see if
it changes anything.

If that still doesn''t work, to track down what you might do wrong, you
can start by installing a fresh domU using virt-manager. It should (by
default) create a working domU with Centos'' default kernel-xen, using
the virtual vnc console as the default console.

-- 
Fajar

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Now I can connect to the domU console by vnc.
Thanks a lot.

Best Wishes!
Qiang Ma



On Tue, Dec 7, 2010 at 12:14 PM, Fajar A. Nugraha <list@fajar.net> wrote:
> On Tue, Dec 7, 2010 at 9:34 AM, ma qiang <maqiang1984@gmail.com>
wrote:
> > I have tried uncomment this line and reboot, but it doesn''t
work.
>
> It should work.
>
> Since you mention you already see the kernel boot message, you might
> want to try replacing "tty1" with "console" on
/etc/inittab and see if
> it changes anything.
>
> If that still doesn''t work, to track down what you might do wrong,
you
> can start by installing a fresh domU using virt-manager. It should (by
> default) create a working domU with Centos'' default kernel-xen,
using
> the virtual vnc console as the default console.
>
> --
> Fajar
>

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Xen-users mailing list
Xen-users@lists.xensource.com
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