ubuntu-auto-install: install a ubuntu image with kvm

notes.txt

## how i verified hwe-t kernel boots / functions.

$ sudo apt-get update
$ sudo apt-get install qemu-system-x86
$ sudo chmod 666 /dev/kvm

$ burl="http://archive.ubuntu.com/ubuntu/dists/precise-proposed/main/installer-amd64/current/images/trusty-netboot/ubuntu-installer/"

$ wget "$burl/amd64/linux" -O kernel
$ wget "$burl/amd64/initrd.gz" -O initrd

$ md5sum kernel initrd 
eabacd97fa75fcf0946531f597390107  kernel
ccf58028315106c22b7187e1026a988a  initrd

$ qemu-img create -f qcow2 disk.img 4G

$ PRESEED_URL=http://some.url
$ qemu-system-x86_64 -enable-kvm -m 1024 -curses \
   -device virtio-net-pci,netdev=net00  -netdev type=user,id=net00 \
   -drive if=virtio,file=disk.img,cache=unsafe  \
   -no-reboot -kernel kernel -initrd initrd \
   -append "apt-setup/proposed=true nomodeset fb=false priority=critical locale=en_US url=$PRESEED_URL"

# the kernel command line params are:
#  apt-setup/proposed=true: required per LP: #1172101
#  nomodeset fb=false: for -curses friendliness
#
## took defaults for everything other than
##  * http_proxy (put in local proxy: http://192.168.1.130:3128/ )
##  * user: ubuntu passwd: ubuntu

## Then boot the system, removing the '-kernel and -initrd'
## verify that I'm running a 3.13 kernel

$ uname -r
3.13.0-30-generic

## just for my random information, you can then make it boot
## sanely in curses mode only by:
## echo "blacklist vga16fb" | sudo tee /etc/modprobe.d/novga16fb.conf
## sudo sed -i -e 's,\(GRUB_CMDLINE_LINUX_DEFAULT\)=.*,\1="quiet nomodeset",' \
##        -e 's,#GRUB_TERMINAL=console,GRUB_TERMINAL=console,' \
##        /etc/default/grub
## sudo update-grub
## sudo update-initramfs -u

preseed

# based on http://bit.ly/uquick-doc 
#d-i   mirror/country string manual
#d-i   mirror/http/hostname string mymirror.org
#d-i   mirror/http/directory string /rep
#d-i   mirror/http/proxy string
#d-i   mirror/http/mirror select mymirror.org
d-i	debian-installer/locale	string en_US.UTF-8
d-i	debian-installer/splash boolean false
d-i	console-setup/ask_detect	boolean false
d-i	console-setup/layoutcode	string us
d-i	console-setup/variantcode	string 
d-i	netcfg/get_nameservers	string 
d-i	netcfg/get_ipaddress	string 
d-i	netcfg/get_netmask	string 255.255.255.0
d-i	netcfg/get_gateway	string 
d-i	netcfg/confirm_static	boolean true
d-i	clock-setup/utc	boolean true
d-i 	partman-auto/method string regular
d-i 	partman-lvm/device_remove_lvm boolean true
d-i 	partman-lvm/confirm boolean true
d-i 	partman/confirm_write_new_label boolean true
d-i 	partman/choose_partition        select Finish partitioning and write changes to disk
d-i 	partman/confirm boolean true
d-i 	partman/confirm_nooverwrite boolean true
d-i 	partman/default_filesystem string ext3
d-i 	clock-setup/utc boolean true
d-i	clock-setup/ntp	boolean true
d-i	clock-setup/ntp-server	string ntp.ubuntu.com
d-i	passwd/root-login	boolean false
d-i	passwd/make-user	boolean true
d-i	passwd/user-fullname	string ubuntu
d-i	passwd/username	string ubuntu
d-i	passwd/user-password-crypted	password $6$.1eHH0iY$ArGzKX2YeQ3G6U.mlOO3A.NaL22Ewgz8Fi4qqz.Ns7EMKjEJRIW2Pm/TikDptZpuu7I92frytmk5YeL.9fRY4.
d-i	passwd/user-uid	string 
d-i	user-setup/allow-password-weak	boolean false
d-i	user-setup/encrypt-home	boolean false
d-i	passwd/user-default-groups	string adm cdrom dialout lpadmin plugdev sambashare
d-i	apt-setup/services-select	multiselect security
d-i	apt-setup/security_host	string security.ubuntu.com
d-i	apt-setup/security_path	string /ubuntu
d-i	debian-installer/allow_unauthenticated	string false
d-i	pkgsel/upgrade	select safe-upgrade
d-i	pkgsel/language-packs	multiselect 
d-i	pkgsel/update-policy	select none
d-i	pkgsel/updatedb	boolean true
d-i	grub-installer/skip	boolean false
d-i	lilo-installer/skip	boolean false
d-i	grub-installer/only_debian	boolean true
d-i	grub-installer/with_other_os	boolean true
d-i	finish-install/keep-consoles	boolean false
d-i	finish-install/reboot_in_progress	note 
d-i	cdrom-detect/eject	boolean true
d-i	debian-installer/exit/halt	boolean false
d-i	debian-installer/exit/poweroff	boolean false
d-i	pkgsel/include string vim openssh-server
d-i   preseed/late_command string \
        in-target sh -c '\
          echo blacklist vga16fb > /etc/modprobe.d/novga16fb.conf; \
          gld=GRUB_CMDLINE_LINUX_DEFAULT; gtr=GRUB_TERMINAL; \
          printf "$gld=\n$gtr=console\n" >> /etc/default/grub ; \
          update-initramfs -u; \
          update-grub;'

ubuntu-auto-install

#!/bin/bash

VERBOSITY=0
TEMP_D=""
DEF_PRESEED="http://bit.ly/uquick"
DEF_SIZE=4
DEF_MIRROR="http://archive.ubuntu.com/ubuntu"
DEF_ARCH=$(uname -m)

[ "$DEF_ARCH" = "x86_64" ] && DEF_ARCH=amd64

error() { echo "$@" 1>&2; }
errorp() { printf "$@" 1>&2; }
fail() { [ $# -eq 0 ] || error "$@"; exit 1; }
failp() { [ $# -eq 0 ] || errorp "$@"; exit 1; }

Usage() {
	cat <<EOF
Usage: ${0##*/} [ options ] release [ arch [ size ] ]

   Do an install of Ubuntu for release.
   arch : the arch to use (amd64 i386). Default: ${DEF_ARCH}
   size : size of the image (in GigaBytes). Default: ${DEF_SIZE}

   options:
    -o | --output  IMAGE_FILE    write the image to IMAGE_FILE
                                 default: <release>-<arch>.img
    -s | --preseed PRESEED       use the preseed at preseed
                                 default: ${DEF_PRESEED}
    -m | --mirror  MIRROR        mirror to download iso from MIRROR
                                 default: ${DEF_MIRROR}
         --iso     ISO           use ISO file rather than downloading
EOF
}

bad_Usage() { Usage 1>&2; [ $# -eq 0 ] || error "$@"; exit 1; }
cleanup() {
	[ -z "${TEMP_D}" -o ! -d "${TEMP_D}" ] || rm -Rf "${TEMP_D}"
}

dl() {
	local url="$1" out="${2}" opts=""
	[ "$url" = "$out" ] && return
	[ $VERBOSITY -lt 1 ] && opts="-q"
	case "$url" in
		http://*|ftp://*) wget $opts "$url" -O "${out}";;
		*) cat "${url}" -O "${out}";;
	esac
}

debug() {
	local level=${1}; shift;
	[ "${level}" -ge "${VERBOSITY}" ] && return
	error "${@}"
}

short_opts="hm:o:p:v"
long_opts="help,iso:,mirror:,output:,preseed:,verbose"
getopt_out=$(getopt --name "${0##*/}" \
	--options "${short_opts}" --long "${long_opts}" -- "$@") &&
	eval set -- "${getopt_out}" ||
	bad_Usage

release="${DEF_RELEASE}"
preseed="${DEF_PRESEED}"
output=""
mirror="${DEF_MIRROR}"
arch="${DEF_ARCH}"
iso=""

while [ $# -ne 0 ]; do
	cur=${1}; next=${2};
	case "$cur" in
		-h|--help) Usage ; exit 0;;
		-i|--iso) iso=${2}; shift;;
		-m|--mirror) mirror=${2}; shift;;
		-o|--output) output=${2}; shift;;
		-p|--preseed) preseed=${2}; shift;;
		-v|--verbose) VERBOSITY=$((${VERBOSITY}+1));;
		--) shift; break;;
	esac
	shift;
done

[ $# -ne 0 ] || bad_Usage "must provide arguments"
[ $# -lt 1 -o $# -gt 3 ] && bad_Usage "must provide 1,2, or 3 args"
release=$1
arch=${2:-${DEF_ARCH}}
size=${3:-${DEF_SIZE}}
size=${size%G}

[ -n "$output" ] || output="${release}-${arch}.img"

TEMP_D=$(mktemp -d "${TMPDIR:-/tmp}/${0##*/}.XXXXXX") ||
	fail "failed to make tempdir"
trap cleanup EXIT

if [ -z "$iso" ]; then
	iso="${release}-${arch}-mini.iso"
	if [ -f "$iso" ]; then
		debug 1 "using existing iso ${iso}"
	else
		url="${mirror}/dists/$release/main/installer-$arch/current/images/netboot/mini.iso" 
		debug 1 "downloading ${url}"
		dl "${url}" "${iso}" || fail "failed to download $iso from $url"
	fi
fi

dl "$preseed" preseed.cfg ||
	fail "failed to download preseed: ${preseed}"

debug 1 "extracting kernel and ramdisk"
for f in /linux /initrd.gz ; do
	isoinfo -RJ -x "$f" -i "$iso" > "${f##*/}.dist" ||
		fail "failed to extract $f from $iso"
done

debug 1 "repacking initramfs"
zcat initrd.gz.dist > initrd &&
	echo "./preseed.cfg" | cpio -o --format=newc --append -F initrd &&
	gzip -9 initrd -c > initrd.gz && rm -f initrd ||
	fail "failed to repack initrd"

debug 1 "creating a ${size}G disk in ${output}"
qemu-img create -f qcow2 "${output}" "${size}G" || 
	fail "failed to create image"

set -x
${KVM:-kvm} -kernel linux -initrd initrd.gz \
	-append "priority=critical locale=en_US" \
	-drive "file=${output},if=virtio,cache=unsafe" \
	-cdrom "${iso}" -m 512 -boot d -no-reboot \

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