bootstrap.sh

#!/bin/sh

# Mostly deboostrap, but also changes hostname and configures networking
# for guest. Intended to use with lxc and bridged networks with dnsmasq.

PACKAGES=avahi-daemon,openssh-server
USER_NAME=squeeze
DISTRIBUTION=precise
VM_PATH=${1-template}
VM_NAME=$(basename $VM_PATH)

sudo debootstrap --include=$PACKAGES $DISTRIBUTION $VM_PATH
sudo chroot $VM_PATH /bin/bash -c "useradd -m -s /bin/bash -G sudo $USER_NAME"
sudo chroot $VM_PATH /bin/bash -c "echo $USER_NAME:$USER_NAME | chpasswd"
sudo chroot $VM_PATH /bin/bash -c "cat > /etc/hostname <<EOF
$VM_NAME
EOF"
sudo chroot $VM_PATH /bin/bash -c "cat > /etc/network/interfaces <<EOF
auto lo
iface lo inet loopback

auto eth0
iface eth0 inet dhcp
EOF"
sudo chroot $VM_PATH /bin/bash -c "sed -i s/rlimit-nproc=3// /etc/avahi/avahi-daemon.conf"
ssh-keygen -P "" -f $VM_NAME.key
sudo mkdir -p $VM_PATH/home/$USER_NAME/.ssh
sudo mv $VM_NAME.key.pub $VM_PATH/home/$USER_NAME/.ssh/authorized_keys

cat > $VM_NAME.xml <<EOF
<domain type='lxc'>
  <name>$VM_NAME</name>
  <memory>332768</memory>
  <os>
    <type>exe</type>
    <init>/sbin/init</init>
  </os>
  <vcpu>1</vcpu>
  <clock offset='utc'/>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>destroy</on_crash>
  <devices>
    <emulator>/usr/lib/libvirt/libvirt_lxc</emulator>
    <filesystem type='mount'>
      <source dir='$VM_PATH'/>
      <target dir='/'/>
    </filesystem>
    <interface type='network'>
      <source network='default'/>
    </interface>
    <console type='pty' />
  </devices>
</domain>
EOF