# BAREMETAL DEBIAN SYSTEM IMAGE
# WARNING: NO WARRANTY OF ANY KIND, USE IT AT YOUR OWN RISK.
# License: GNU GPL v.2+ && GNU LGPL v.2.1+
# Requires: util-linux, debootstrap, grub
# Recommends: kvm

#
# Create a disk of 10G (extensible)
#
dd if=/dev/zero of=vm1.img count=0 bs=512 seek=20M
losetup /dev/loop0 vm1.img


#
# Create an ext3 root filesystem of 1G
#
dd if=/dev/zero of=debian.img count=2M bs=512
mkfs.ext3 -F debian.img
tune2fs -c 50 debian.img
losetup /dev/loop1 debian.img


#
# Create a debian core
#
mkdir rootfs
mount /dev/loop1 rootfs
debootstrap lenny rootfs


#
# Install a kernel and grub, then customize the debian core system.
# Variants for a x86_64 system are commented.
#
ROOTFS_UUID=`file debian.img | awk -F"UUID=" '{print $2}' | cut -d" " -f1`
mount --bind /dev rootfs/dev
chroot rootfs env -i TERM=xterm-color LANG=C PATH=$PATH bash
mount -t proc none /proc
mount -t sysfs none /sys
echo "deb http://ftp.debian.org/debian/ lenny main contrib" > /etc/apt/sources.list
echo "deb-src http://ftp.debian.org/debian/ lenny main contrib" >> /etc/apt/sources.list
apt-get update
apt-get --yes install linux-image
# apt-get --yes install linux-image-amd64
apt-get install locales console-data less pv htop vim-nox
apt-get --yes install grub
mkdir /boot/grub
cp /usr/lib/grub/i386-pc/* /boot/grub
# cp /usr/lib/grub/x86_64-pc/* /boot/grub/
#
# (Setup your locales if needed)
# dpkg-reconfigure console-data
# loadkeys fr
#
# Then exit from the chroot
# umount /sys
# umount /proc
# exit
#
# Configure the grub boot loader
echo "(hd0) debian.img" >> device.map
grub --device-map=device.map
root (hd0,0)
setup (hd0)
quit
echo "(hd0) UUID=$ROOTFS_UUID" >> rootfs/boot/grub/device.map
chroot rootfs env -i ROOTFS_UUID=$ROOTFS_UUID TERM=xterm-color LANG=C PATH=$PATH bash
update-grub
# Then replace "root=/dev/mapper/loop0p1" by "root=UUID=$ROOTFS_UUID",
# and add groot=(hd0,0) in /boot/grub/menu.lst


#
# Format with fdisk (n, p, 1, \n, $PART_SIZE, a, 1, w)
# Number of cylinders = IMG_SIZE / (Heads * Sectors * Block size)
#
PART_SIZE=`ls -l debian.img | cut -d" " -f5`
DISK_SIZE=`ls -l vm1.img | cut -d" " -f5`
let CYL="$DISK_SIZE/(255*63*512)"
fdisk -C$CYL -H255 -S63 vm1.img


#
# Insert the root filesystem image inside the disk image
#
dd if=/dev/loop1 of=/dev/loop0 bs=512 seek=1


# TODO
kpartx -a /dev/loop0
mke2fs -j /dev/mapper/loop0p1
#vol_id --uuid /dev/mapper/loop0p1 > target.uuid
#blkid /dev/mapper/loop0p1
mount /dev/mapper/loop0p1 /mnt/target

#
# Free the loop devices
#
losetup -d /dev/loop0
losetup -d /dev/loop1