Extract script to finalize ubuntu boxes
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Fabio Rehm
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367
boxes/ubuntu/finalize
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367
boxes/ubuntu/finalize
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#!/bin/bash
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# This is a modified version of /usr/share/lxc/templates/lxc-ubuntu
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# that comes with Ubuntu 13.04 changed to suit vagrant-lxc needs
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#
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# template script for generating ubuntu container for LXC
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#
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# This script consolidates and extends the existing lxc ubuntu scripts
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#
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# Copyright © 2011 Serge Hallyn <serge.hallyn@canonical.com>
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# Copyright © 2010 Wilhelm Meier
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# Author: Wilhelm Meier <wilhelm.meier@fh-kl.de>
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License version 2, as
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# published by the Free Software Foundation.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License along
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# with this program; if not, write to the Free Software Foundation, Inc.,
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# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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#
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set -e
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if [ -r /etc/default/lxc ]; then
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. /etc/default/lxc
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fi
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configure_ubuntu()
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{
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rootfs=$1
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release=$2
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hostname=$2
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# configure the network using the dhcp
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cat <<EOF > $rootfs/etc/network/interfaces
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# This file describes the network interfaces available on your system
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# and how to activate them. For more information, see interfaces(5).
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# The loopback network interface
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auto lo
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iface lo inet loopback
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auto eth0
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iface eth0 inet dhcp
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EOF
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# set the hostname
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cat <<EOF > $rootfs/etc/hostname
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$hostname
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EOF
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# set minimal hosts
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cat <<EOF > $rootfs/etc/hosts
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127.0.0.1 localhost
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127.0.1.1 $hostname
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# The following lines are desirable for IPv6 capable hosts
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::1 ip6-localhost ip6-loopback
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fe00::0 ip6-localnet
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ff00::0 ip6-mcastprefix
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ff02::1 ip6-allnodes
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ff02::2 ip6-allrouters
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EOF
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if [ ! -f $rootfs/etc/init/container-detect.conf ]; then
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# suppress log level output for udev
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sed -i "s/=\"err\"/=0/" $rootfs/etc/udev/udev.conf
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# remove jobs for consoles 5 and 6 since we only create 4 consoles in
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# this template
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rm -f $rootfs/etc/init/tty{5,6}.conf
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fi
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if ! (grep -q vagrant $rootfs/etc/passwd); then
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chroot $rootfs useradd --create-home -s /bin/bash vagrant
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echo "vagrant:vagrant" | chroot $rootfs chpasswd
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fi
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# make sure we have the current locale defined in the container
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chroot $rootfs locale-gen en_US.UTF-8
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chroot $rootfs update-locale LANG=en_US.UTF-8
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return 0
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}
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# finish setting up the user in the container by injecting ssh key and
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# adding sudo group membership.
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# passed-in user is 'vagrant'
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finalize_user()
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{
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user=$1
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sudo_version=$(chroot $rootfs dpkg-query -W -f='${Version}' sudo)
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if chroot $rootfs dpkg --compare-versions $sudo_version gt "1.8.3p1-1"; then
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groups="sudo"
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else
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groups="sudo admin"
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fi
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for group in $groups; do
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chroot $rootfs groupadd --system $group >/dev/null 2>&1 || true
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chroot $rootfs adduser ${user} $group >/dev/null 2>&1 || true
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done
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chroot $rootfs cp /etc/sudoers /etc/sudoers.orig >/dev/null 2>&1 || true
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chroot $rootfs sed -i -e 's/%sudo\s\+ALL=(ALL:ALL)\s\+ALL/%sudo ALL=NOPASSWD:ALL/g' /etc/sudoers >/dev/null 2>&1 || true
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if [ -n "$auth_key" -a -f "$auth_key" ]; then
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u_path="/home/${user}/.ssh"
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root_u_path="$rootfs/$u_path"
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mkdir -p $root_u_path
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cp $auth_key "$root_u_path/authorized_keys"
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chroot $rootfs chown -R ${user}: "$u_path"
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echo "Inserted SSH public key from $auth_key into /home/${user}/.ssh/authorized_keys"
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fi
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return 0
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}
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write_sourceslist()
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{
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# $1 => path to the rootfs
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# $2 => architecture we want to add
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# $3 => whether to use the multi-arch syntax or not
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case $2 in
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amd64|i386)
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MIRROR=${MIRROR:-http://archive.ubuntu.com/ubuntu}
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SECURITY_MIRROR=${SECURITY_MIRROR:-http://security.ubuntu.com/ubuntu}
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;;
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*)
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MIRROR=${MIRROR:-http://ports.ubuntu.com/ubuntu-ports}
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SECURITY_MIRROR=${SECURITY_MIRROR:-http://ports.ubuntu.com/ubuntu-ports}
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;;
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esac
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if [ -n "$3" ]; then
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cat >> "$1/etc/apt/sources.list" << EOF
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deb [arch=$2] $MIRROR ${release} main restricted universe multiverse
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deb [arch=$2] $MIRROR ${release}-updates main restricted universe multiverse
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deb [arch=$2] $SECURITY_MIRROR ${release}-security main restricted universe multiverse
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EOF
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else
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cat >> "$1/etc/apt/sources.list" << EOF
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deb $MIRROR ${release} main restricted universe multiverse
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deb $MIRROR ${release}-updates main restricted universe multiverse
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deb $SECURITY_MIRROR ${release}-security main restricted universe multiverse
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EOF
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fi
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}
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trim()
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{
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rootfs=$1
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release=$2
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# provide the lxc service
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cat <<EOF > $rootfs/etc/init/lxc.conf
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# fake some events needed for correct startup other services
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description "Container Upstart"
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start on startup
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script
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rm -rf /var/run/*.pid
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rm -rf /var/run/network/*
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/sbin/initctl emit stopped JOB=udevtrigger --no-wait
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/sbin/initctl emit started JOB=udev --no-wait
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end script
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EOF
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# fix buggus runlevel with sshd
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cat <<EOF > $rootfs/etc/init/ssh.conf
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# ssh - OpenBSD Secure Shell server
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#
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# The OpenSSH server provides secure shell access to the system.
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description "OpenSSH server"
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start on filesystem
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stop on runlevel [!2345]
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expect fork
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respawn
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respawn limit 10 5
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umask 022
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# replaces SSHD_OOM_ADJUST in /etc/default/ssh
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oom never
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pre-start script
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test -x /usr/sbin/sshd || { stop; exit 0; }
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test -e /etc/ssh/sshd_not_to_be_run && { stop; exit 0; }
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test -c /dev/null || { stop; exit 0; }
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mkdir -p -m0755 /var/run/sshd
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end script
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# if you used to set SSHD_OPTS in /etc/default/ssh, you can change the
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# 'exec' line here instead
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exec /usr/sbin/sshd
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EOF
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cat <<EOF > $rootfs/etc/init/console.conf
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# console - getty
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#
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# This service maintains a console on tty1 from the point the system is
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# started until it is shut down again.
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start on stopped rc RUNLEVEL=[2345]
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stop on runlevel [!2345]
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respawn
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exec /sbin/getty -8 38400 /dev/console
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EOF
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cat <<EOF > $rootfs/lib/init/fstab
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# /lib/init/fstab: cleared out for bare-bones lxc
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EOF
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# remove pointless services in a container
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chroot $rootfs /usr/sbin/update-rc.d -f ondemand remove
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chroot $rootfs /bin/bash -c 'cd /etc/init; for f in $(ls u*.conf); do mv $f $f.orig; done'
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chroot $rootfs /bin/bash -c 'cd /etc/init; for f in $(ls tty[2-9].conf); do mv $f $f.orig; done'
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chroot $rootfs /bin/bash -c 'cd /etc/init; for f in $(ls plymouth*.conf); do mv $f $f.orig; done'
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chroot $rootfs /bin/bash -c 'cd /etc/init; for f in $(ls hwclock*.conf); do mv $f $f.orig; done'
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chroot $rootfs /bin/bash -c 'cd /etc/init; for f in $(ls module*.conf); do mv $f $f.orig; done'
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# if this isn't lucid, then we need to twiddle the network upstart bits :(
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if [ $release != "lucid" ]; then
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sed -i 's/^.*emission handled.*$/echo Emitting lo/' $rootfs/etc/network/if-up.d/upstart
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fi
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}
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post_process()
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{
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rootfs=$1
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release=$2
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trim_container=$3
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if [ $trim_container -eq 1 ]; then
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trim $rootfs $release
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elif [ ! -f $rootfs/etc/init/container-detect.conf ]; then
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# Make sure we have a working resolv.conf
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cresolvonf="${rootfs}/etc/resolv.conf"
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mv $cresolvonf ${cresolvonf}.lxcbak
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cat /etc/resolv.conf > ${cresolvonf}
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# for lucid, if not trimming, then add the ubuntu-virt
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# ppa and install lxcguest
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if [ $release = "lucid" ]; then
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chroot $rootfs apt-get update
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chroot $rootfs apt-get install --force-yes -y python-software-properties
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chroot $rootfs add-apt-repository ppa:ubuntu-virt/ppa
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fi
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chroot $rootfs apt-get update
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chroot $rootfs apt-get install --force-yes -y lxcguest
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# Restore old resolv.conf
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rm -f ${cresolvonf}
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mv ${cresolvonf}.lxcbak ${cresolvonf}
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fi
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# If the container isn't running a native architecture, setup multiarch
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if [ -x "$(ls -1 ${rootfs}/usr/bin/qemu-*-static 2>/dev/null)" ]; then
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dpkg_version=$(chroot $rootfs dpkg-query -W -f='${Version}' dpkg)
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if chroot $rootfs dpkg --compare-versions $dpkg_version ge "1.16.2"; then
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chroot $rootfs dpkg --add-architecture ${hostarch}
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else
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mkdir -p ${rootfs}/etc/dpkg/dpkg.cfg.d
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echo "foreign-architecture ${hostarch}" > ${rootfs}/etc/dpkg/dpkg.cfg.d/lxc-multiarch
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fi
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# Save existing value of MIRROR and SECURITY_MIRROR
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DEFAULT_MIRROR=$MIRROR
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DEFAULT_SECURITY_MIRROR=$SECURITY_MIRROR
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# Write a new sources.list containing both native and multiarch entries
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> ${rootfs}/etc/apt/sources.list
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write_sourceslist $rootfs $arch "native"
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MIRROR=$DEFAULT_MIRROR
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SECURITY_MIRROR=$DEFAULT_SECURITY_MIRROR
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write_sourceslist $rootfs $hostarch "multiarch"
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# Finally update the lists and install upstart using the host architecture
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chroot $rootfs apt-get update
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chroot $rootfs apt-get install --force-yes -y --no-install-recommends upstart:${hostarch} mountall:${hostarch} iproute:${hostarch} isc-dhcp-client:${hostarch}
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fi
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# rmdir /dev/shm for containers that have /run/shm
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# I'm afraid of doing rm -rf $rootfs/dev/shm, in case it did
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# get bind mounted to the host's /run/shm. So try to rmdir
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# it, and in case that fails move it out of the way.
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if [ ! -L $rootfs/dev/shm ] && [ -d $rootfs/run/shm ] && [ -e $rootfs/dev/shm ]; then
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mv $rootfs/dev/shm $rootfs/dev/shm.bak
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ln -s /run/shm $rootfs/dev/shm
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fi
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}
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release=precise # Default to the last Ubuntu LTS release for non-Ubuntu systems
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if [ -f /etc/lsb-release ]; then
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. /etc/lsb-release
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if [ "$DISTRIB_ID" = "Ubuntu" ]; then
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release=$DISTRIB_CODENAME
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fi
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fi
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arch=$(uname -m)
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# Code taken from debootstrap
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if [ -x /usr/bin/dpkg ] && /usr/bin/dpkg --print-architecture >/dev/null 2>&1; then
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arch=`/usr/bin/dpkg --print-architecture`
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elif type udpkg >/dev/null 2>&1 && udpkg --print-architecture >/dev/null 2>&1; then
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arch=`/usr/bin/udpkg --print-architecture`
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else
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arch=$(uname -m)
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if [ "$arch" = "i686" ]; then
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arch="i386"
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elif [ "$arch" = "x86_64" ]; then
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arch="amd64"
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elif [ "$arch" = "armv7l" ]; then
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arch="armel"
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fi
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fi
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if [ "$(id -u)" != "0" ]; then
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echo "This script should be run as 'root'"
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exit 1
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fi
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declare cache=`readlink -f .` \
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arch=$1 \
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release=$2 \
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auth_key=$3
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# detect rootfs
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cache=`readlink -f .`
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rootfs="${cache}/rootfs"
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configure_ubuntu $rootfs $release
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if [ $? -ne 0 ]; then
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echo "failed to configure ubuntu $release for a container"
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exit 1
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fi
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post_process $rootfs $release $trim_container
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finalize_user vagrant
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echo ""
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echo "##"
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echo "# The default user is 'vagrant' with password 'vagrant'!"
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echo "# Use the 'sudo' command to run tasks as root in the container."
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echo "##"
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echo ""
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