From: Sven Hoexter Date: Fri, 22 Jun 2012 13:39:59 +0000 (+0200) Subject: Add hacked lxc-debian script for Debian/Squeeze. X-Git-Url: http://git.sven.stormbind.net/?p=sven%2Fscripts.git;a=commitdiff_plain;h=2ce8f57e97d322e4c9292b2429f26d7699d3144f Add hacked lxc-debian script for Debian/Squeeze. --- diff --git a/stormbind/lxc-debian b/stormbind/lxc-debian new file mode 100755 index 0000000..3c0a743 --- /dev/null +++ b/stormbind/lxc-debian @@ -0,0 +1,315 @@ +#!/bin/bash + +# +# lxc: linux Container library + +# Authors: +# Daniel Lezcano + +# This library is free software; you can redistribute it and/or +# modify it under the terms of the GNU Lesser General Public +# License as published by the Free Software Foundation; either +# version 2.1 of the License, or (at your option) any later version. + +# This library 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 +# Lesser General Public License for more details. + +# You should have received a copy of the GNU Lesser General Public +# License along with this library; if not, write to the Free Software +# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + +configure_debian() +{ + rootfs=$1 + hostname=$2 + + # configure the inittab + cat < $rootfs/etc/inittab +id:3:initdefault: +si::sysinit:/etc/init.d/rcS +l0:0:wait:/etc/init.d/rc 0 +l1:1:wait:/etc/init.d/rc 1 +l2:2:wait:/etc/init.d/rc 2 +l3:3:wait:/etc/init.d/rc 3 +l4:4:wait:/etc/init.d/rc 4 +l5:5:wait:/etc/init.d/rc 5 +l6:6:wait:/etc/init.d/rc 6 +# Normally not reached, but fallthrough in case of emergency. +z6:6:respawn:/sbin/sulogin +1:2345:respawn:/sbin/getty 38400 console +c1:12345:respawn:/sbin/getty 38400 tty1 linux +c2:12345:respawn:/sbin/getty 38400 tty2 linux +c3:12345:respawn:/sbin/getty 38400 tty3 linux +c4:12345:respawn:/sbin/getty 38400 tty4 linux +EOF + + # disable selinux in debian + mkdir -p $rootfs/selinux + echo 0 > $rootfs/selinux/enforce + + # configure the network using the dhcp + cat < $rootfs/etc/network/interfaces +auto lo +iface lo inet loopback + +auto eth0 +iface eth0 inet dhcp +EOF + + # set the hostname + cat < $rootfs/etc/hostname +$hostname +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 umountfs remove + chroot $rootfs /usr/sbin/update-rc.d -f hwclock.sh remove + chroot $rootfs /usr/sbin/update-rc.d -f hwclockfirst.sh remove + + echo "root:root" | chroot $rootfs chpasswd + echo "Root password is 'root', please change !" + + return 0 +} + +download_debian() +{ + packages=\ +ifupdown,\ +locales,\ +libui-dialog-perl,\ +dialog,\ +isc-dhcp-client,\ +netbase,\ +net-tools,\ +iproute,\ +openssh-server + + cache=$1 + arch=$2 + + # check the mini debian was not already downloaded + mkdir -p "$cache/partial-$arch" + if [ $? -ne 0 ]; then + echo "Failed to create '$cache/partial-$arch' directory" + return 1 + fi + + # download a mini debian into a cache + echo "Downloading debian minimal ..." + debootstrap --verbose --variant=minbase --arch=$arch \ + --include $packages \ + squeeze $cache/partial-$arch http://ftp.hosteurope.de/mirror/ftp.debian.org/debian + if [ $? -ne 0 ]; then + echo "Failed to download the rootfs, aborting." + return 1 + fi + + mv "$1/partial-$arch" "$1/rootfs-$arch" + echo "Download complete." + + return 0 +} + +copy_debian() +{ + cache=$1 + arch=$2 + rootfs=$3 + + # make a local copy of the minidebian + echo -n "Copying rootfs to $rootfs..." + cp -a $cache/rootfs-$arch $rootfs || return 1 + return 0 +} + +install_debian() +{ + cache="/var/cache/lxc/debian" + rootfs=$1 + mkdir -p /var/lock/subsys/ + ( + flock -n -x 200 + if [ $? -ne 0 ]; then + echo "Cache repository is busy." + return 1 + fi + + arch=$(arch) + if [ "$arch" == "x86_64" ]; then + arch=amd64 + fi + + if [ "$arch" == "i686" ]; then + arch=i386 + fi + + echo "Checking cache download in $cache/rootfs-$arch ... " + if [ ! -e "$cache/rootfs-$arch" ]; then + download_debian $cache $arch + if [ $? -ne 0 ]; then + echo "Failed to download 'debian base'" + return 1 + fi + fi + + copy_debian $cache $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 + + cat <> $path/config +lxc.tty = 4 +lxc.pts = 1024 +lxc.rootfs = $rootfs +lxc.cgroup.devices.deny = a +# /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 + +# mounts point +lxc.mount.entry=proc $rootfs/proc proc nodev,noexec,nosuid 0 0 +lxc.mount.entry=devpts $rootfs/dev/pts devpts defaults 0 0 +lxc.mount.entry=sysfs $rootfs/sys sysfs defaults 0 0 +EOF + + if [ $? -ne 0 ]; then + echo "Failed to add configuration" + return 1 + fi + + return 0 +} + +clean() +{ + cache="/var/cache/lxc/debian" + + if [ ! -e $cache ]; then + exit 0 + fi + + # lock, so we won't purge while someone is creating a repository + ( + flock -n -x 200 + if [ $? != 0 ]; then + echo "Cache repository is busy." + exit 1 + fi + + echo -n "Purging the download cache..." + rm --preserve-root --one-file-system -rf $cache && echo "Done." || exit 1 + exit 0 + + ) 200>/var/lock/subsys/lxc +} + +usage() +{ + cat < --clean +EOF + return 0 +} + +options=$(getopt -o hp:n:c -l help,path:,name:,clean -- "$@") +if [ $? -ne 0 ]; then + usage $(basename $0) + exit 1 +fi +eval set -- "$options" + +while true +do + case "$1" in + -h|--help) usage $0 && exit 0;; + -p|--path) path=$2; shift 2;; + -n|--name) name=$2; shift 2;; + -c|--clean) clean=$2; shift 2;; + --) shift 1; break ;; + *) break ;; + esac +done + +if [ ! -z "$clean" -a -z "$path" ]; then + clean || exit 1 + exit 0 +fi + +type debootstrap +if [ $? -ne 0 ]; then + echo "'debootstrap' command is missing" + exit 1 +fi + +if [ -z "$path" ]; then + echo "'path' parameter is required" + exit 1 +fi + +if [ "$(id -u)" != "0" ]; then + echo "This script should be run as 'root'" + exit 1 +fi + +rootfs=$path/ + +install_debian $rootfs +if [ $? -ne 0 ]; then + echo "failed to install debian" + exit 1 +fi + +configure_debian $rootfs $name +if [ $? -ne 0 ]; then + echo "failed to configure debian for a container" + exit 1 +fi + +copy_configuration $path $rootfs +if [ $? -ne 0 ]; then + echo "failed write configuration file" + exit 1 +fi + +if [ ! -z $clean ]; then + clean || exit 1 + exit 0 +fi