path: root/prepare-vm-by-debootstrap/make-vm-debootstrap

#!/bin/bash

set -e
exec 3>&1
exec >/tmp/debootstrap.log
echo "I: log=/tmp/debootstrap.log">&2
#set -x

if [ "$(id -ru)" != "0" ]; then
    echo "Run this script as root">&2
    exit 1
fi

# you can abuse official mirror for debootstrap since we are going to cache
# packages anyway.

RELEASE=raring
MIRROR=http://fr.archive.ubuntu.com/ubuntu/
ARCH=amd64
#DESTDIR=/tmp/debootstrap-mountpoint
PKGS="$(sed 's/^#.*$//'<<EOF

vim-nox
htop
screen
tmux
less
bzip2
bash-completion
locate
acpid
# acpi-support-base: should not be needed in ubuntu
bind9-host
locales
busybox
runit
iperf
ncdu
ranger
tree
psmisc
w3m
lftp
curl
wget

ncurses-base
ncurses-term

linux-image-virtual
# or linux-image, linux-virtual, or linux-image-virtual, wich depend on latest
# pkgs

# maybe not a systematic case
#openssh-server

extlinux
EOF
)"

while [ -n "$1" ]; do
    case "$1" in
        -d) shift; DESTDIR="$1";;
        *) echo "Unknown option $arg">&2; exit 1;;
    esac
    shift
done

#[ -z "$BLOCKDEV" ] && { echo "Specify block device (-d)">&2; exit 1; }
[ -z "$DESTDIR" ] && { echo "Specify destdir (-d)">&2; exit 1; }

ARCHIVE=$PWD/$RELEASE-$ARCH-debootstrap.tgz
KERNEL=$PWD/$RELEASE-$ARCH-vmlinuz

#BLOCKDEV="$(df -P "$DESTDIR" | tail -n 1 | cut -d' ' -f1)"
#(
#echo "I: blockdevice associated to destination is $BLOCKDEV"
#echo "I: blockdevice will not be manipulated directly,"
#echo "I: it is only used for informational purposes (such as UUID)"
#)>&2

echo "I: script will begin in 10seconds...">&2
printf "I: ">&2
for i in $(seq 10 -1 0); do sleep 1; printf "%d... " $i>&2; done
echo>&2

#echo "Warning: will erase $BLOCKDEV with mkfs.ext4 in 10seconds...">&2
#for i in $(seq 10 -1 0); do sleep 1; printf "%d... " $i>&2; done
#echo>&2
#mkfs -q -F -t ext4 -L rootfs "$BLOCKDEV" || exit 1
#mkdir -p "$DESTDIR"
#echo "mounting block device...">&2
#mount -v -t ext4 "$BLOCKDEV" "$DESTDIR" || \
#    mount -v -t ext4 -o loop "$BLOCKDEV" "$DESTDIR" || exit 1
#echo "In case of error, please remember to umount $DESTDIR">&2

if [ ! -e "$ARCHIVE" ]; then
    echo "I: debootstrap archive does not exists, making it">&2
    debootstrap --foreign --arch="$ARCH" \
        --include="$PKGS" --components=main,universe \
        --make-tarball "$ARCHIVE" \
        "$RELEASE" "$DESTDIR" "$MIRROR" || exit 1
fi

echo "I: debootstraping...">&2
debootstrap --foreign --arch="$ARCH" \
    --include="$PKGS" --components=main,universe \
    --unpack-tarball "$ARCHIVE" \
    "$RELEASE" "$DESTDIR" "$MIRROR"

if [ ! -e "$KERNEL" ];then
    echo "I: wget kernel...">&2
    wget -q "$MIRROR/dists/$RELEASE/main/installer-$ARCH/current/images/netboot/ubuntu-installer/$ARCH/linux" -O "$KERNEL"
fi

echo "I: adjust configuration...">&2
rm -f "$DESTDIR/etc/localtime"
cat "$DESTDIR/usr/share/zoneinfo/Europe/Paris" > "$DESTDIR/etc/localtime"

# network
cat >"$DESTDIR/etc/network/interfaces"<<EOF
auto lo
iface lo inet loopback

auto eth0
iface eth0 inet static
address 10.1.1.252
netmask 255.255.255.0
gateway 10.1.1.254
EOF
echo "127.0.0.1 localhost localhost.localdomain">"$DESTDIR/etc/hosts"
echo "localhost">"$DESTDIR/etc/hostname"
echo "servername 10.1.1.254">"$DESTDIR/etc/resolv.conf"

for f in "$DESTDIR"/etc/init/tty[1-6].conf; do
    echo "manual">${f%.conf}.override
done

chmod +w /etc/sudoers
sed 's,#* *%sudo.*,%sudo ALL=(ALL) NOPASSWD: ALL,' -i /etc/sudoers
chmod -w /etc/sudoers

#UUID="$(blkid "$BLOCKDEV" | sed 's/^.*UUID="\([a-zA-Z0-9-]\+\)".*$/\1/')"
cat >"$DESTDIR/etc/fstab"<<EOF
# <device> <mount point> <type> <options> <dump>  <pass>
/dev/vda   /     ext4 errors=remount-ro,noatime                      0 1
tmpfs /tmp     tmpfs mode=1777,noatime,size=128m,nodev,nosuid,noexec 0 0
tmpfs /var/log tmpfs mode=1777,noatime,size=4m,nodev,nosuid,noexec   0 0
tmpfs /var/tmp tmpfs mode=1777,noatime,size=128m,nodev,nosuid,noexec 0 0

#UUID=$UUID /    ext4 errors=remount-ro,noatime                      0 1
#UUID=use blkid for uuid discovery /home ext4 noatime                0 2
#UUID=6d9ac889-3c25-4e05-90f3-d183f8b14aca none  swap sw,auto        0 0
EOF

mkdir -p "$DESTDIR/etc/sv/ttyS0/"
mkdir -p "$DESTDIR/etc/service/"
cat >"$DESTDIR/etc/sv/ttyS0/run"<<"EOF"
#!/bin/bash
dev=/dev/ttyS0
/bin/stty -F $dev sane clocal -crtscts -hupcl
exec <$dev >$dev 2>$dev
echo
echo "Press enter to continue..."; read
cd /root
/usr/bin/env -i HOME=/root PATH=/usr/sbin:/usr/bin:/sbin:/bin TERM=screen-256color /usr/bin/setsid /bin/bash
exec wait
#exec /bin/bash
#exec /usr/bin/env -i /bin/sh
#exec /usr/bin/setsid /bin/sh
EOF
chmod +x "$DESTDIR/etc/sv/ttyS0/run"
ln -sfv "/etc/sv/ttyS0/" "$DESTDIR/etc/service/"

mkdir -p "$DESTDIR/etc/ssh"
cat >"$DESTDIR/etc/ssh/sshd_config"<<EOF
Port 22
Protocol 2
HostKey /etc/ssh/ssh_host_rsa_key
HostKey /etc/ssh/ssh_host_dsa_key
HostKey /etc/ssh/ssh_host_ecdsa_key
UsePrivilegeSeparation yes
KeyRegenerationInterval 3600
ServerKeyBits 768
SyslogFacility AUTH
LogLevel INFO
LoginGraceTime 120
PermitRootLogin no
StrictModes yes
RSAAuthentication yes
PubkeyAuthentication yes
IgnoreRhosts yes
RhostsRSAAuthentication no
HostbasedAuthentication no
PermitEmptyPasswords no
ChallengeResponseAuthentication no
PasswordAuthentication no
X11Forwarding yes
X11DisplayOffset 10
PrintMotd no
PrintLastLog yes
TCPKeepAlive yes
AcceptEnv LANG LC_*
Subsystem sftp /usr/lib/openssh/sftp-server
UsePAM yes
AllowUsers calendros
EOF

cat > "$DESTDIR/etc/apt/sources.list" <<EOF
deb $MIRROR $RELEASE main universe
deb http://security.ubuntu.com/ubuntu/ $RELEASE-security main universe
EOF

# /etc/default files:
cat > "$DESTDIR/etc/default/console-setup"<<EOF
VERBOSE_OUTPUT="no"
ACTIVE_CONSOLES="/dev/ttyS0"
CHARMAP="UTF-8"
CODESET="Uni2"
FONTFACE="Fixed"
FONTSIZE="16"
if [ -f /etc/default/keyboard ]; then
    . /etc/default/keyboard
fi
EOF
cat >"$DESTDIR/etc/default/keyboard"<<EOF
XKBMODEL="pc105"
XKBLAYOUT="fr"
XKBVARIANT="bepo"
XKBOPTIONS=""
EOF
cat >"$DESTDIR/etc/default/locale"<<EOF
LANG="en_US.UTF-8"
LC_TIME="en_DK.UTF-8"
LC_PAPER="en_GB.UTF-8"
LC_MEASUREMENT="en_GB.UTF-8"
EOF

cat >>"$DESTDIR/etc/bash.bashrc"<<EOF
# enable bash completion in interactive shells
if ! shopt -oq posix; then
  if [ -f /usr/share/bash-completion/bash_completion ]; then
    . /usr/share/bash-completion/bash_completion
  elif [ -f /etc/bash_completion ]; then
    . /etc/bash_completion
  fi
fi
alias ls="ls --color=aut"
alias l="ls -CF"
alias ll="l -lh"
alias la="l -a"
alias e="vim"
alias rm='rm -i'
alias cp='cp -i'
alias mv='mv -i'
export PAGER=less
export EDITOR=vim
export VISUAL=vim
EOF

mkdir -p "$DESTDIR/etc/vim"
cat >"$DESTDIR/etc/vim/vimrc"<<EOF
set nocompatible
set modelines=0
set backspace=2
syntax on
set autoindent
set ts=4
set shiftwidth=4
set ruler
set laststatus=2
set statusline=%<%f%h%m%r%=%l,%c\ %P
set wildmode=list:full
set nobackup nowritebackup
set hlsearch
set whichwrap=<,>,[,]
set scrolloff=1
EOF

rm -r "$DESTDIR/etc/skel"
mkdir -p "$DESTDIR/etc/skel"

cat > "$DESTDIR/init-stage2.sh" << EOF
#!/bin/sh
export PATH="/usr/sbin:/usr/bin:/sbin:/bin"
mount -no remount,rw /
mount -t proc proc /proc
mount -t sysfs sysfs /sys

/debootstrap/debootstrap --second-stage

# second stage may unmount this...
[ -e /proc/mounts ] || mount -t proc proc /proc
[ -e /sys/kernel ] || mount -t sysfs sysfs /sys
busybox mdev -s

echo '------ mounts:'
cat /proc/mounts
echo '------'

mv /etc/default/extlinux /etc/default/extlinux.dist
cat >/etc/default/extlinux<<EOF2
EXTLINUX_UPDATE="true"
EXTLINUX_ALTERNATIVES="default"
EXTLINUX_DEFAULT="l0"
EXTLINUX_ENTRIES="all"
EXTLINUX_MEMDISK="true"
EXTLINUX_MEMDISK_DIRECTORY="/boot"
EXTLINUX_MENU_LABEL="Ubuntu GNU/Linux, kernel"
EXTLINUX_OS_PROBER="false"
EXTLINUX_PARAMETERS="ro quiet console=ttyS0,115200n8 panic=120 oops=panic"
EXTLINUX_ROOT="root=/dev/vda"
EXTLINUX_THEME="none"
EXTLINUX_TIMEOUT="1" # wait 1 tenth of a second (0 is wait forever...)
EOF2
[ -e /dev/root ] || ln -sv /dev/vda /dev/root
extlinux -i /boot/extlinux/

passwd -d -l root
useradd -M -b /home -d /home/calendros -U -G sudo -s /bin/bash calendros
mkdir -p /home/calendros/.ssh/
touch /home/calendros/.ssh/authorized_keys
chmod 700 /home/calendros/.ssh
chmod 600 /home/calendros/.ssh/authorized_keys
chown calendros:calendros -R /home/calendros
echo '. /etc/bash.bashrc' >~root/.bashrc
echo '. ~/.bashrc' >~root/.bash_profile
echo '. /etc/bash.bashrc' >~calendros/.bashrc
echo '. ~/.bashrc' >~calendros/.bash_profile

locale-gen en_US.UTF-8 en_GB.UTF-8 en_DK.UTF-8 fr_FR.UTF-8

# dhclient may erase /etc/resolv.conf, and is not really useful here
#ip link set eth0 up
#dhclient eth0
#apt-get update

echo "Dropping a shell, press Ctrl-D or type exit to finish."
/bin/bash

rm -v /etc/udev/rules.d/70-persistent-*.rules

echo "Bootstrap ended, poweroff in 10seconds..."
rm /init-stage2.sh
#sleep 10 || exec /bin/bash # for debug
#poweroff & # does not work
sync
fuser -k /
sleep 1
mount -o remount,ro /
exit 0 # will panic, but does not matter now (don't know how to shutdown o/w)
EOF
chmod +x "$DESTDIR/init-stage2.sh"

cat >&2 <<EOF
I: please umount destination blockdev...
I: like: sudo umount -v "$DESTDIR"
I: then run vm, deboostrap phase 2 (adjust blockdev)...
I: export DEV=blockdev; qemu-system-x86_64 -machine accel=kvm -m 256 \\
    -monitor unix:/tmp/debootstrap-monitor,server,nowait \\
    -serial  unix:/tmp/debootstrap-serial,server \\
    -vga vmware -display none \\
    -drive file="\$DEV",if=virtio \\
    -kernel "$KERNEL" \\
    -append "quiet rootdelay=10 root=/dev/vda init=/init-stage2.sh console=ttyS0,115200n8"
I: To copy this image to another host, remember to run:
I: extlinux -i /yourcopyplace/boot/extlinux/
I: end of script...
EOF