#!/bin/bash
#
# fai kexec from upstream live cds, i.e. curl|bash
# You can copy this to a http server, then wget -O- url|sudo bash
# curl is sometimes not preinstalled on a live cd.
#
# This has been tested on trisquel belanos and ubuntu xenial.
#
# If the screen just sits in a weird color inverted, corrupted looking state,
# it's probably nothing wrong with the computer, but a problem
# with the fai server. If you can do this from a virtual terminal,
# it will print out more info (I know from running it on a vm).

set -ex
if grep -q ID=ubuntu /etc/os-release; then
    # add universe, pxe-kexec is there
    sed -ri '/^\s*deb/{/universe/!s/$/ universe/}' /etc/apt/sources.list
fi
if ! type -p pxe-kexec &>/dev/null; then
    apt-get update
    apt-get install -y debconf
    debconf-set-selections <<EOF
kexec-tools kexec-tools/load_kexec boolean false
EOF
    apt-get install -y pxe-kexec
fi
# running this piped to bash on belanos, the apt-get goes
# into the background while it's still installing, and pxe-kexec
# just exits right away. sleep calls are strangely ignored.
# I don't know whats going on, but just running the same
# command again once it finishes works, and this is only
# rarely used and done manually anyways, so whatever.
pxe-kexec -n --ignore-whitelist -l fai-generated faiserver