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#!/bin/sh
# vi: ts=4 noexpandtab
#
# Copyright (C) 2010 Canonical Ltd.
#
# Authors: Scott Moser <smoser@canonical.com>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, version 3 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
TEMP_D=""
error() { echo "$@" 1>&2; }
fail() { [ $# -eq 0 ] || error "$@"; exit 1; }
Usage() {
cat <<EOF
Usage: ${0##*/} output.img
Create a multiboot floppy image that can boot a cloudimg disk image
The output.iso file can then be booted with
kvm -fda output.img -boot a -drive cloudimg-image.img...
EOF
}
bad_Usage() { Usage 1>&2; fail "$@"; }
cleanup() {
[ -z "${TEMP_D}" -o ! -d "${TEMP_D}" ] || rm -Rf "${TEMP_D}"
}
getsize() {
local f="$1" size=""
size=$(ls -l "${f}" 2>/dev/null | awk '{print $5}') &&
[ -n "${size}" ] && _RET=${size} && return 0
}
checksize() {
getsize "$1" || return 1
[ "${_RET}" "$2" "$3" ]
}
mk_grub_rescue() {
local output=${1}
local bdir="${TEMP_D}/bdir"
local err="${TEMP_D}/err"
local modules="configfile"
modules="biosdisk tar memdisk configfile part_msdos ext2 multiboot test serial echo terminal chain sleep minicmd search linux"
mkdir "${bdir}" &&
mkdir -p "${bdir}/boot/grub" &&
cat > "${bdir}/boot/grub/grub.cfg" <<EOF
serial --unit=0 --speed=9600
terminal_input console serial
terminal_output console serial
set default=0
set timeout=5
set menu_color_normal=white/black
set menu_color_highlight=black/light-gray
menuentry 'cloud-image with random ubuntu password' --class gnu-linux --class gnu --class os {
set gfxpayload=keep
search --no-floppy --label cloudimg-rootf --set
linux /vmlinuz "ro init=/usr/lib/cloud-init/uncloud-init root=LABEL=cloudimg-rootfs ds=nocloud-net ubuntu-pass=random"
if [ -f /initrd.img ]; then
initrd /initrd.img
fi
}
menuentry 'cloud-image with ubuntu:ubuntu' --class gnu-linux --class gnu --class os {
set gfxpayload=keep
search --no-floppy --label cloudimg-rootf --set
linux /vmlinuz "ro init=/usr/lib/cloud-init/uncloud-init root=LABEL=cloudimg-rootfs ds=nocloud-net ubuntu-pass=ubuntu"
if [ -f /initrd.img ]; then
initrd /initrd.img
fi
}
menuentry 'cloud-image seeded from a url [must be edited]' --class gnu-linux --class gnu --class os {
set gfxpayload=keep
search --no-floppy --label cloudimg-rootf --set
linux /vmlinuz "ro root=LABEL=cloudimg-rootfs ds=nocloud-net;s=http://example.com/demo-"
if [ -f /initrd.img ]; then
initrd /initrd.img
fi
}
EOF
[ $? -eq 0 ] || return
grub-mkrescue --output="${output}" \
${modules:+"--modules=${modules}"} "${bdir}" > "${err}" 2>&1 ||
{ cat "${err}" 1>&2; return 1; }
}
short_opts="h"
long_opts="help"
getopt_out=$(getopt --name "${0##*/}" \
--options "${short_opts}" --long "${long_opts}" -- "$@") &&
eval set -- "${getopt_out}" ||
bad_Usage
mode="grub-rescue-floppy"
while [ $# -ne 0 ]; do
cur=${1}; next=${2};
case "$cur" in
-h|--help) Usage; exit 0;;
--) shift; break;;
esac
shift;
done
[ $# -eq 1 ] || bad_Usage "must supply only output image"
TEMP_D=$(mktemp -d "${TMPDIR:-/tmp}/.${0##*/}.XXXXXX") ||
fail "failed to make tempd"
trap cleanup EXIT
output=${1}
case "${mode}" in
grub-rescue-floppy)
mk_grub_rescue "${output}" ||
fail "failed to make rescue floppy"
checksize "${output}" -lt $((2880*1024)) ||
fail "output of mk_rescue was to large for floppy"
size=${_RET}
truncate --size 2880K "${output}" ||
fail "failed to pad ${output} to 2880K"
echo "created ${mode} image in ${output} (payload $size)"
;;
grub-rescue-cdrom)
mk_grub_rescue "${output}" ||
fail "failed to make rescue cdrom"
echo "created ${mode} image in ${output}"
;;
esac
[ $? -eq 0 ] || fail "failed to create image"
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