[CentOS] xm console -- what should I get?

Fri Jul 16 15:35:36 UTC 2010
Gordon Messmer <yinyang at eburg.com>

On 07/16/2010 05:06 AM, Theo Band wrote:
> It works for para-virtualized guests (with xen kernel) not for
> fully-virtualized ones.

For fully-virtualized guests, make sure the guest definition contains:

   <serial type='pty'>
     <target port='0'/>
   <console type='pty'>
     <target port='0'/>

If you add this, you'll need to redefine the guest, then shut it down 
completely ("poweroff" the guest, not reboot).

# virsh define /etc/libvirt/qemu/guest.xml

Once a serial console is defined in the guest, set up grub.  Edit 
/boot/grub/grub.conf and replace the timeout, splashimage, and 
hiddenmenu lines with:

serial --unit=0 --speed=115200 --word=8 --parity=no --stop=1
terminal --timeout=5 serial console

Make sure all of the "kernel" lines contain a serial console arg:

     kernel /boot/vmlinuz-... ro root=LABEL=/ console=ttyS0,115200

And finally make sure that /etc/inittab starts a getty on the serial 

s0:2345:respawn:/sbin/agetty -L 115200 ttyS0 vt100

The last three are the same steps you'd take to set up a machine with a 
physical serial console.