[Xen-users] How to find dom0 name from domU

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Hello, 

I'm using a little trick, (contatenating the hostname of the dom0 
in the domU 'extra' directive) but I'd like to known if there is a
better form. Thank you.

bigbox03-dom0:~  # cat /etc/xen/vm/-vm1 
import os
name="vm1"
uuid="1245bac6-d09d-f9b0-a8eb-45aa443e9c44"
memory=384
maxmem=384
vcpus=1
on_poweroff="destroy"
on_reboot="restart"
on_crash="destroy"
localtime=0
keymap="us"
builder="linux"
bootloader="/usr/lib/xen/boot/domUloader.py"
bootargs="--entry=xvda1:/boot/vmlinuz-xen,/boot/initrd-xen"
extra= "xencons=tty Dom0Hostname="+os.uname()[1]
disk=[ 'file:/var/lib/xen/images/vm1/disk0,xvda,w', ]
vif=[ 'bridge=br0', ]

DomU:~ # cat /proc/cmdline 
xencons=tty Dom0Hostname=bigbox03-dom0




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