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#!/bin/bash
#
# System installer.
#

# Load
source $APP_BASE/lib/hydra/functions || exit 1
hydra_config_load

# Setup.
hydra_read device /dev/sdb "Destination device"
hydra_read garbage y "Pre-fill volumes with garbage? (y/n)"
hydra_read hostname $HOSTNAME "Hostname"
hydra_read domain example.com "Domain"
hydra_read arch amd64 "System arch"
hydra_read version lenny "Distro version"
hydra_read vg vg "Temporary install vg"
hydra_read grub n "Setup GRUB? (y/n)"

# Warning.
echo ""
echo "Make sure you have chosen the right parameters"
echo "and that $device has the needed partitions."
echo ""
echo "Press ENTER to continue, Ctrl-C to abort."
read answer

# Create volumes.
echo "Creating the needed disk volumes..."
pvcreate "$device"3
vgcreate $vg "$device"3
lvcreate -L20G -n root $vg
vgchange -a y $vg

# Garbage.
if [ "$garbage" == "y" ]; then
  echo "Filling volumes with garbage..."
  dd if=/dev/urandom of=/dev/$vg/root
  dd if=/dev/urandom of="$device"1
fi

# Create root device.
echo "Creating root device..."
cryptsetup -h sha256 -c aes-cbc-essiv:sha256 -s 256 luksFormat /dev/$vg/root
cryptsetup luksOpen /dev/$vg/root debootstrap
mkfs.ext3 /dev/mapper/debootstrap

# Initial system install.
echo "Installing base system..."
mkdir /tmp/debootstrap
mount /dev/mapper/debootstrap /tmp/debootstrap/
debootstrap --arch=$arch $version /tmp/debootstrap/

# Initial configuration.
echo "Applying initial configuration..."
mount none -t proc /tmp/debootstrap/proc/
mount -o bind /dev/ /tmp/debootstrap/dev
cp -L /etc/resolv.conf /tmp/debootstrap/etc
echo $hostname.$domain > /tmp/debootstrap/etc/hostname
echo "127.0.0.1 localhost $hostname $hostname.$domain" >> /tmp/debootstrap/etc/hosts
echo LANG=C > /tmp/debootstrap/etc/default/locale

# Initial upgrade.
echo "Applying initial upgrades..."
chroot /tmp/debootstrap/ apt-get update
chroot /tmp/debootstrap/ apt-get upgrade
chroot /tmp/debootstrap/ apt-get install locales cryptsetup lvm2 initramfs-tools grub

# Crypttab.
echo "Configuring crypttab..."
cat > /tmp/debootstrap/etc/crypttab <<-EOF
# <target name> <source device>   <key file>  <options>
root            /dev/mapper/vg-root     none            luks,cipher=aes-cbc-essiv:sha256
cswap           "$device"1               /dev/random     swap,cipher=aes-cbc-essiv:sha256
EOF

# Fstab.
echo "Configuring fstab..."
cat > /tmp/debootstrap/etc/fstab <<-EOF
/dev/mapper/cswap none swap sw 0 0
/dev/mapper/root  /    ext3 defaults,errors=remount-ro 0 1
EOF

# Boot.
echo "Boot device setup..."
mkfs.ext3 "$device"2
mount "$device"2 /boot
grub-install --no-floppy "$device"
echo "    "$device"2 /boot ext3 defaults,errors=remount-ro 0 2" >> /tmp/debootstrap/etc/fstab

# Grub.
if [ "$grub" == "y" ]; then
  echo "Setting up GRUB..."
  mkdir -p /tmp/debootstrap/boot/grub/
  cat /tmp/debootstrap/boot/grub/menu.lst <<-EOF
title $hostname (hd0)
root  (hd0,1)
kernel  /vmlinuz-2.6.26-2-vserver-amd64 root=/dev/mapper/root ro quiet rootdelay=10
initrd  /initrd.img-2.6.26-2-vserver-amd64

title $hostname (hd0) (single)
root  (hd0,1)
kernel  /vmlinuz-2.6.26-2-vserver-amd64 root=/dev/mapper/root ro single rootdelay=10
initrd  /initrd.img-2.6.26-2-vserver-amd64
EOF
fi

# Kernel.
echo "Installing kernel..."
cat > /tmp/debootstrap/boot/grub/etc/initramfs-tools/modules <<-EOF
dm-mod
dm-crypt
aes
twofish
sha256
EOF

cat > /tmp/debootstrap/etc/kernel-img.conf <<-EOF
do_initrd = Yes
EOF

if [ "$arch" == "i386" ]; then
  kernel_arch="686"
else
  kernel_arch="$arch"
fi

chroot /tmp/debootstrap apt-get install linux-image-2.6-vserver-$kernel_arch

# Initramfs.
echo "Creating initramfs..."
chroot /tmp/debootstrap update-initramfs -v -u

# Ssh.
echo "Installing OpenSSH daemon..."
chroot /tmp/debootstrap apt-get install openssh-server

echo "OpenSSH fingerprints:"
chroot /tmp/debootstrap ssh-keygen -l -f /etc/ssh/ssh_host_dsa_key.pub
chroot /tmp/debootstrap ssh-keygen -l -f /etc/ssh/ssh_host_rsa_key.pub

# Accounts.
echo "Installing sudo..."
chroot /tmp/debootstrap apt-get install sudo

echo "Choose a root password."
chroot /tmp/debootstrap passwd root

# Final steps:
# Create an user account with sudo privileges.
# Network setup.