Misc
LVM backed snapshots;
http://www.golinuxhub.com/2017/09/understanding-lvm-snapshots-create.html
Autostart domU after dom0 reboot:
https://askubuntu.com/questions/196444/how-do-i-auto-start-xen-guests-on-boot
cd /etc/xen/auto/
ln -s <xl file config> .
This DOESN'T work ....fuck it.
Mandatory XKCD - we want the domU to start ...not fucking care how..
### this will make sure all stuff in /etc/local.d/ gets treated during init process.
rc-update -v add local default
cd /etc/local.d/
## file name has to end with .start
vi startDomU.start
##obviously - this bit goes into the file
xl create -f /etc/xen/domU_config.xl
chmod u+x startDomU.start