Crafting vagrant-lxc boxes, see http://fabiorehm.com/blog/2013/07/18/crafting-your-own-vagrant-lxc-base-box/ for more info

debian.sh

#!/bin/bash

##################################################################################
# 1 - Create the base container

SUITE=squeeze
RELEASE=$SUITE
sudo lxc-create -n ${RELEASE}-base -t debian

rootfs="/var/lib/lxc/${RELEASE}-base/rootfs"

# This fixes some networking issues
# See https://github.com/fgrehm/vagrant-lxc/issues/91 for more info
sudo sed -i -e "s/\(127.0.0.1\s\+localhost\)/\1\n127.0.1.1\t${RELEASE}-base\n/g" ${rootfs}/etc/hosts

# This ensures that `/tmp` does not get cleared on halt
# See https://github.com/fgrehm/vagrant-lxc/issues/68 for more info
sudo chroot $rootfs /usr/sbin/update-rc.d -f checkroot-bootclean.sh remove
sudo chroot $rootfs /usr/sbin/update-rc.d -f mountall-bootclean.sh remove
sudo chroot $rootfs /usr/sbin/update-rc.d -f mountnfs-bootclean.sh remove


##################################################################################
# 2 - Prepare vagrant user


ROOTFS=/var/lib/lxc/${RELEASE}-base/rootfs
sudo chroot ${ROOTFS} useradd --create-home -s /bin/bash vagrant

echo -n 'vagrant:vagrant' | sudo chroot ${ROOTFS} chpasswd


##################################################################################
# 3 - Setup SSH access and passwordless sudo

sudo chroot ${ROOTFS} apt-get install sudo -y --force-yes
sudo chroot ${ROOTFS} adduser vagrant sudo

# Configure SSH access
sudo mkdir -p ${ROOTFS}/home/vagrant/.ssh
sudo wget https://raw.github.com/mitchellh/vagrant/master/keys/vagrant.pub -O ${ROOTFS}/home/vagrant/.ssh/authorized_keys
sudo chroot ${ROOTFS} chown -R vagrant: /home/vagrant/.ssh

# Enable passwordless sudo for users under the "sudo" group
sudo cp ${ROOTFS}/etc/sudoers{,.orig}
sudo sed -i -e \
      's/%sudo\s\+ALL=(ALL\(:ALL\)\?)\s\+ALL/%sudo ALL=NOPASSWD:ALL/g' \
      ${ROOTFS}/etc/sudoers


##################################################################################
# 4 - Add some goodies

sudo chroot ${ROOTFS} apt-get install -y --force-yes ca-certificates
sudo chroot ${ROOTFS} apt-get update

# ADD YOUR STUFF HERE


##################################################################################
# 5 - Free up some disk space

sudo rm -rf ${ROOTFS}/tmp/*
sudo chroot ${ROOTFS} apt-get clean


##################################################################################
# 6 - Build box package

# Set up a working dir
mkdir -p /tmp/vagrant-lxc-${RELEASE}

# Compress container's rootfs
cd /var/lib/lxc/${RELEASE}-base
sudo tar --numeric-owner -czf /tmp/vagrant-lxc-${RELEASE}/rootfs.tar.gz ./rootfs/*

# Prepare package contents
cd /tmp/vagrant-lxc-${RELEASE}
sudo chown $USER:`id -gn` rootfs.tar.gz
wget https://raw.github.com/fgrehm/vagrant-lxc/master/boxes/common/lxc-template
wget https://raw.github.com/fgrehm/vagrant-lxc/master/boxes/common/lxc.conf
wget https://raw.github.com/fgrehm/vagrant-lxc/master/boxes/common/metadata.json
chmod +x lxc-template

# Vagrant box!
tar -czf vagrant-lxc-${RELEASE}.box ./*

ubuntu.sh

#!/bin/bash

##################################################################################
# 1 - Create the base container

RELEASE=precise
ARCH=amd64
sudo lxc-create -n ${RELEASE}-base -t ubuntu -- --release ${RELEASE} --arch ${ARCH}


##################################################################################
# 2 - Prepare vagrant user

ROOTFS=/var/lib/lxc/${RELEASE}-base/rootfs
sudo chroot ${ROOTFS} usermod -l vagrant -d /home/vagrant ubuntu

echo -n 'vagrant:vagrant' | sudo chroot ${ROOTFS} chpasswd


##################################################################################
# 3 - Setup SSH access and passwordless sudo

# Configure SSH access
sudo mkdir -p ${ROOTFS}/home/vagrant/.ssh
sudo wget https://raw.github.com/mitchellh/vagrant/master/keys/vagrant.pub -O ${ROOTFS}/home/vagrant/.ssh/authorized_keys
sudo chroot ${ROOTFS} chown -R vagrant: /home/vagrant/.ssh

# Enable passwordless sudo for users under the "sudo" group
sudo cp ${ROOTFS}/etc/sudoers{,.orig}
sudo sed -i -e \
      's/%sudo\s\+ALL=(ALL\(:ALL\)\?)\s\+ALL/%sudo ALL=NOPASSWD:ALL/g' \
      ${ROOTFS}/etc/sudoers


##################################################################################
# 4 - Add some goodies

PACKAGES=(vim curl wget manpages bash-completion)
sudo chroot ${ROOTFS} apt-get install ${PACKAGES[*]} -y --force-yes

# ADD YOUR STUFF HERE


##################################################################################
# 5 - Free up some disk space

sudo rm -rf ${ROOTFS}/tmp/*
sudo chroot ${ROOTFS} apt-get clean


##################################################################################
# 6 - Build box package

# Set up a working dir
mkdir -p /tmp/vagrant-lxc-${RELEASE}

# Compress container's rootfs
cd /var/lib/lxc/${RELEASE}-base
sudo tar --numeric-owner -czf /tmp/vagrant-lxc-${RELEASE}/rootfs.tar.gz ./rootfs/*

# Prepare package contents
cd /tmp/vagrant-lxc-${RELEASE}
sudo chown $USER:`id -gn` rootfs.tar.gz
wget https://raw.github.com/fgrehm/vagrant-lxc/master/boxes/common/lxc-template
wget https://raw.github.com/fgrehm/vagrant-lxc/master/boxes/common/lxc.conf
wget https://raw.github.com/fgrehm/vagrant-lxc/master/boxes/common/metadata.json
chmod +x lxc-template

# Vagrant box!
tar -czf vagrant-lxc-${RELEASE}-${ARCH}.box ./*