#!/bin/bash # This is a modified version of /usr/share/lxc/templates/lxc-ubuntu # that comes with Ubuntu 12.10 changed to suit vagrant-lxc needs # # template script for generating ubuntu container for LXC # # This script consolidates and extends the existing lxc ubuntu scripts # # Copyright © 2011 Serge Hallyn # Copyright © 2010 Wilhelm Meier # Author: Wilhelm Meier # # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License version 2, as # published by the Free Software Foundation. # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # You should have received a copy of the GNU General Public License along # with this program; if not, write to the Free Software Foundation, Inc., # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. # set -e if [ -r /etc/default/lxc ]; then . /etc/default/lxc fi configure_ubuntu() { rootfs=$1 release=$3 hostname='quantal64' # configure the network using the dhcp cat < $rootfs/etc/network/interfaces # This file describes the network interfaces available on your system # and how to activate them. For more information, see interfaces(5). # The loopback network interface auto lo iface lo inet loopback auto eth0 iface eth0 inet dhcp EOF # set the hostname cat < $rootfs/etc/hostname $hostname EOF # set minimal hosts cat < $rootfs/etc/hosts 127.0.0.1 localhost 127.0.1.1 $hostname # The following lines are desirable for IPv6 capable hosts ::1 ip6-localhost ip6-loopback fe00::0 ip6-localnet ff00::0 ip6-mcastprefix ff02::1 ip6-allnodes ff02::2 ip6-allrouters EOF if [ ! -f $rootfs/etc/init/container-detect.conf ]; then # suppress log level output for udev sed -i "s/=\"err\"/=0/" $rootfs/etc/udev/udev.conf # remove jobs for consoles 5 and 6 since we only create 4 consoles in # this template rm -f $rootfs/etc/init/tty{5,6}.conf fi if ! (grep -q vagrant $rootfs/etc/passwd); then chroot $rootfs useradd --create-home -s /bin/bash vagrant echo "vagrant:vagrant" | chroot $rootfs chpasswd fi return 0 } # finish setting up the user in the container by injecting ssh key and # adding sudo group membership. # passed-in user is 'vagrant' finalize_user() { user=$1 sudo_version=$(chroot $rootfs dpkg-query -W -f='${Version}' sudo) if chroot $rootfs dpkg --compare-versions $sudo_version gt "1.8.3p1-1"; then groups="sudo" else groups="sudo admin" fi for group in $groups; do chroot $rootfs groupadd --system $group >/dev/null 2>&1 || true chroot $rootfs adduser ${user} $group >/dev/null 2>&1 || true done chroot $rootfs cp /etc/sudoers /etc/sudoers.orig >/dev/null 2>&1 || true 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 chroot $rootfs locale-gen en_US en_US.UTF-8 hu_HU hu_HU.UTF-8 >/dev/null 2>&1 || true chroot $rootfs dpkg-reconfigure locales >/dev/null 2>&1 || true if [ -n "$auth_key" -a -f "$auth_key" ]; then u_path="/home/${user}/.ssh" root_u_path="$rootfs/$u_path" mkdir -p $root_u_path cp $auth_key "$root_u_path/authorized_keys" chroot $rootfs chown -R ${user}: "$u_path" echo "Inserted SSH public key from $auth_key into /home/${user}/.ssh/authorized_keys" fi return 0 } write_sourceslist() { # $1 => path to the rootfs # $2 => architecture we want to add # $3 => whether to use the multi-arch syntax or not case $2 in amd64|i386) MIRROR=${MIRROR:-http://archive.ubuntu.com/ubuntu} SECURITY_MIRROR=${SECURITY_MIRROR:-http://security.ubuntu.com/ubuntu} ;; *) MIRROR=${MIRROR:-http://ports.ubuntu.com/ubuntu-ports} SECURITY_MIRROR=${SECURITY_MIRROR:-http://ports.ubuntu.com/ubuntu-ports} ;; esac if [ -n "$3" ]; then cat >> "$1/etc/apt/sources.list" << EOF deb [arch=$2] $MIRROR ${release} main restricted universe multiverse deb [arch=$2] $MIRROR ${release}-updates main restricted universe multiverse deb [arch=$2] $SECURITY_MIRROR ${release}-security main restricted universe multiverse EOF else cat >> "$1/etc/apt/sources.list" << EOF deb $MIRROR ${release} main restricted universe multiverse deb $MIRROR ${release}-updates main restricted universe multiverse deb $SECURITY_MIRROR ${release}-security main restricted universe multiverse EOF fi } extract_rootfs() { tarball=$1 arch=$2 rootfs=$3 echo "Extracting $tarball ..." mkdir -p $(dirname $rootfs) # Make sure the rootfs does not exist before extracting rm -rf $rootfs (cd `dirname $rootfs` && tar xfz $tarball) return 0 } install_ubuntu() { rootfs=$1 release=$2 tarball=$3 mkdir -p /var/lock/subsys/ ( flock -x 200 if [ $? -ne 0 ]; then echo "Cache repository is busy." return 1 fi extract_rootfs $tarball $arch $rootfs if [ $? -ne 0 ]; then echo "Failed to copy rootfs" return 1 fi return 0 ) 200>/var/lock/subsys/lxc return $? } copy_configuration() { path=$1 rootfs=$2 name=$3 arch=$4 if [ $arch = "i386" ]; then arch="i686" fi ttydir="" if [ -f $rootfs/etc/init/container-detect.conf ]; then ttydir=" lxc" fi # if there is exactly one veth network entry, make sure it has an # associated hwaddr. nics=`grep -e '^lxc\.network\.type[ \t]*=[ \t]*veth' $path/config | wc -l` if [ $nics -eq 1 ]; then grep -q "^lxc.network.hwaddr" $path/config || cat <> $path/config lxc.network.hwaddr = 00:16:3e:$(openssl rand -hex 3| sed 's/\(..\)/\1:/g; s/.$//') EOF fi grep -q "^lxc.rootfs" $path/config 2>/dev/null || echo "lxc.rootfs = $rootfs" >> $path/config cat <> $path/config lxc.utsname = $name lxc.devttydir =$ttydir lxc.tty = 4 lxc.pts = 1024 lxc.mount = $path/fstab lxc.arch = $arch lxc.cap.drop = sys_module mac_admin mac_override lxc.pivotdir = lxc_putold # uncomment the next line to run the container unconfined: #lxc.aa_profile = unconfined lxc.cgroup.devices.deny = a # Allow any mknod (but not using the node) lxc.cgroup.devices.allow = c *:* m lxc.cgroup.devices.allow = b *:* m # /dev/null and zero lxc.cgroup.devices.allow = c 1:3 rwm lxc.cgroup.devices.allow = c 1:5 rwm # consoles lxc.cgroup.devices.allow = c 5:1 rwm lxc.cgroup.devices.allow = c 5:0 rwm #lxc.cgroup.devices.allow = c 4:0 rwm #lxc.cgroup.devices.allow = c 4:1 rwm # /dev/{,u}random lxc.cgroup.devices.allow = c 1:9 rwm lxc.cgroup.devices.allow = c 1:8 rwm lxc.cgroup.devices.allow = c 136:* rwm lxc.cgroup.devices.allow = c 5:2 rwm # rtc lxc.cgroup.devices.allow = c 254:0 rwm #fuse lxc.cgroup.devices.allow = c 10:229 rwm #tun lxc.cgroup.devices.allow = c 10:200 rwm #full lxc.cgroup.devices.allow = c 1:7 rwm #hpet lxc.cgroup.devices.allow = c 10:228 rwm #kvm lxc.cgroup.devices.allow = c 10:232 rwm EOF cat < $path/fstab proc proc proc nodev,noexec,nosuid 0 0 sysfs sys sysfs defaults 0 0 EOF if [ $? -ne 0 ]; then echo "Failed to add configuration" return 1 fi return 0 } trim() { rootfs=$1 release=$2 # provide the lxc service cat < $rootfs/etc/init/lxc.conf # fake some events needed for correct startup other services description "Container Upstart" start on startup script rm -rf /var/run/*.pid rm -rf /var/run/network/* /sbin/initctl emit stopped JOB=udevtrigger --no-wait /sbin/initctl emit started JOB=udev --no-wait end script EOF # fix buggus runlevel with sshd cat < $rootfs/etc/init/ssh.conf # ssh - OpenBSD Secure Shell server # # The OpenSSH server provides secure shell access to the system. description "OpenSSH server" start on filesystem stop on runlevel [!2345] expect fork respawn respawn limit 10 5 umask 022 # replaces SSHD_OOM_ADJUST in /etc/default/ssh oom never pre-start script test -x /usr/sbin/sshd || { stop; exit 0; } test -e /etc/ssh/sshd_not_to_be_run && { stop; exit 0; } test -c /dev/null || { stop; exit 0; } mkdir -p -m0755 /var/run/sshd end script # if you used to set SSHD_OPTS in /etc/default/ssh, you can change the # 'exec' line here instead exec /usr/sbin/sshd EOF cat < $rootfs/etc/init/console.conf # console - getty # # This service maintains a console on tty1 from the point the system is # started until it is shut down again. start on stopped rc RUNLEVEL=[2345] stop on runlevel [!2345] respawn exec /sbin/getty -8 38400 /dev/console EOF cat < $rootfs/lib/init/fstab # /lib/init/fstab: cleared out for bare-bones lxc EOF # reconfigure some services if [ -z "$LANG" ]; then chroot $rootfs locale-gen en_US.UTF-8 chroot $rootfs update-locale LANG=en_US.UTF-8 else chroot $rootfs locale-gen $LANG chroot $rootfs update-locale LANG=$LANG fi # remove pointless services in a container chroot $rootfs /usr/sbin/update-rc.d -f ondemand remove chroot $rootfs /bin/bash -c 'cd /etc/init; for f in $(ls u*.conf); do mv $f $f.orig; done' chroot $rootfs /bin/bash -c 'cd /etc/init; for f in $(ls tty[2-9].conf); do mv $f $f.orig; done' chroot $rootfs /bin/bash -c 'cd /etc/init; for f in $(ls plymouth*.conf); do mv $f $f.orig; done' chroot $rootfs /bin/bash -c 'cd /etc/init; for f in $(ls hwclock*.conf); do mv $f $f.orig; done' chroot $rootfs /bin/bash -c 'cd /etc/init; for f in $(ls module*.conf); do mv $f $f.orig; done' # if this isn't lucid, then we need to twiddle the network upstart bits :( if [ $release != "lucid" ]; then sed -i 's/^.*emission handled.*$/echo Emitting lo/' $rootfs/etc/network/if-up.d/upstart fi } post_process() { rootfs=$1 release=$2 trim_container=$3 if [ $trim_container -eq 1 ]; then trim $rootfs $release elif [ ! -f $rootfs/etc/init/container-detect.conf ]; then # Make sure we have a working resolv.conf cresolvonf="${rootfs}/etc/resolv.conf" mv $cresolvonf ${cresolvonf}.lxcbak cat /etc/resolv.conf > ${cresolvonf} # for lucid, if not trimming, then add the ubuntu-virt # ppa and install lxcguest if [ $release = "lucid" ]; then chroot $rootfs apt-get update chroot $rootfs apt-get install --force-yes -y python-software-properties chroot $rootfs add-apt-repository ppa:ubuntu-virt/ppa fi chroot $rootfs apt-get update chroot $rootfs apt-get install --force-yes -y lxcguest # Restore old resolv.conf rm -f ${cresolvonf} mv ${cresolvonf}.lxcbak ${cresolvonf} fi # If the container isn't running a native architecture, setup multiarch if [ -x "$(ls -1 ${rootfs}/usr/bin/qemu-*-static 2>/dev/null)" ]; then dpkg_version=$(chroot $rootfs dpkg-query -W -f='${Version}' dpkg) if chroot $rootfs dpkg --compare-versions $dpkg_version ge "1.16.2"; then chroot $rootfs dpkg --add-architecture ${hostarch} else mkdir -p ${rootfs}/etc/dpkg/dpkg.cfg.d echo "foreign-architecture ${hostarch}" > ${rootfs}/etc/dpkg/dpkg.cfg.d/lxc-multiarch fi # Save existing value of MIRROR and SECURITY_MIRROR DEFAULT_MIRROR=$MIRROR DEFAULT_SECURITY_MIRROR=$SECURITY_MIRROR # Write a new sources.list containing both native and multiarch entries > ${rootfs}/etc/apt/sources.list write_sourceslist $rootfs $arch "native" MIRROR=$DEFAULT_MIRROR SECURITY_MIRROR=$DEFAULT_SECURITY_MIRROR write_sourceslist $rootfs $hostarch "multiarch" # Finally update the lists and install upstart using the host architecture chroot $rootfs apt-get update chroot $rootfs apt-get install --force-yes -y --no-install-recommends upstart:${hostarch} mountall:${hostarch} iproute:${hostarch} isc-dhcp-client:${hostarch} fi # rmdir /dev/shm for containers that have /run/shm # I'm afraid of doing rm -rf $rootfs/dev/shm, in case it did # get bind mounted to the host's /run/shm. So try to rmdir # it, and in case that fails move it out of the way. if [ ! -L $rootfs/dev/shm ] && [ -d $rootfs/run/shm ] && [ -e $rootfs/dev/shm ]; then mv $rootfs/dev/shm $rootfs/dev/shm.bak ln -s /run/shm $rootfs/dev/shm fi } usage() { cat <] [ -S | --auth-key ] release: the ubuntu release (e.g. precise): defaults to host release on ubuntu, otherwise uses latest LTS trim: make a minimal (faster, but not upgrade-safe) container arch: the container architecture (e.g. amd64): defaults to host arch auth-key: SSH Public key file to inject into container EOF return 0 } options=$(getopt -o a:b:hp:r:xn:FS:d:C -l arch:,help,path:,release:,trim,name:,flush-cache,auth-key:,debug:,tarball: -- "$@") if [ $? -ne 0 ]; then usage $(basename $0) exit 1 fi eval set -- "$options" release=precise # Default to the last Ubuntu LTS release for non-Ubuntu systems if [ -f /etc/lsb-release ]; then . /etc/lsb-release if [ "$DISTRIB_ID" = "Ubuntu" ]; then release=$DISTRIB_CODENAME fi fi arch=$(uname -m) # Code taken from debootstrap if [ -x /usr/bin/dpkg ] && /usr/bin/dpkg --print-architecture >/dev/null 2>&1; then arch=`/usr/bin/dpkg --print-architecture` elif type udpkg >/dev/null 2>&1 && udpkg --print-architecture >/dev/null 2>&1; then arch=`/usr/bin/udpkg --print-architecture` else arch=$(uname -m) if [ "$arch" = "i686" ]; then arch="i386" elif [ "$arch" = "x86_64" ]; then arch="amd64" elif [ "$arch" = "armv7l" ]; then arch="armel" fi fi debug=0 trim_container=0 hostarch=$arch while true do case "$1" in -h|--help) usage $0 && exit 0;; -p|--path) path=$2; shift 2;; -n|--name) name=$2; shift 2;; -T|--tarball) tarball=$2; shift 2;; -r|--release) release=$2; shift 2;; -a|--arch) arch=$2; shift 2;; -x|--trim) trim_container=1; shift 1;; -S|--auth-key) auth_key=$2; shift 2;; -d|--debug) debug=1; shift 1;; --) shift 1; break ;; *) break ;; esac done if [ $debug -eq 1 ]; then set -x fi if [ "$arch" == "i686" ]; then arch=i386 fi if [ $hostarch = "i386" -a $arch = "amd64" ]; then echo "can't create amd64 container on i386" exit 1 fi if [ -z "$path" ]; then echo "'path' parameter is required" exit 1 fi if [ "$(id -u)" != "0" ]; then echo "This script should be run as 'root'" exit 1 fi # detect rootfs config="$path/config" if grep -q '^lxc.rootfs' $config 2>/dev/null ; then rootfs=`grep 'lxc.rootfs =' $config | awk -F= '{ print $2 }'` else rootfs=$path/rootfs fi install_ubuntu $rootfs $release $tarball if [ $? -ne 0 ]; then echo "failed to install ubuntu $release" exit 1 fi configure_ubuntu $rootfs $release if [ $? -ne 0 ]; then echo "failed to configure ubuntu $release for a container" exit 1 fi copy_configuration $path $rootfs $name $arch if [ $? -ne 0 ]; then echo "failed write configuration file" exit 1 fi post_process $rootfs $release $trim_container finalize_user vagrant echo "" echo "##" echo "# The default user is 'vagrant' with password 'vagrant'!" echo "# Use the 'sudo' command to run tasks as root in the container." echo "##" echo ""