--- /dev/null
+#!/bin/bash
+
+# template script for generating ubuntu container for LXC based on released cloud
+# images
+#
+# Copyright © 2012 Serge Hallyn <serge.hallyn@canonical.com>
+#
+# 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
+
+copy_configuration()
+{
+ path=$1
+ rootfs=$2
+ name=$3
+ arch=$4
+ release=$5
+
+ if [ $arch = "i386" ]; then
+ arch="i686"
+ 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 <<EOF >> $path/config
+lxc.network.hwaddr = 00:16:3e:$(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 <<EOF >> $path/config
+lxc.utsname = $name
+
+lxc.tty = 4
+lxc.pts = 1024
+lxc.mount = $path/fstab
+lxc.arch = $arch
+lxc.cap.drop = sys_module mac_admin
+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 <<EOF > $path/fstab
+proc proc proc nodev,noexec,nosuid 0 0
+sysfs sys sysfs defaults 0 0
+devtmpfs dev devtmpfs defaults 0 0
+EOF
+
+ # 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 $rootfs/dev/shm
+ fi
+
+ return 0
+}
+
+usage()
+{
+ cat <<EOF
+LXC Container configuration for Ubuntu Cloud images.
+
+Generic Options
+[ -r | --release <release> ]: Release name of container, defaults to host
+[ -a | --arch ]: Arhcitecture of container, defaults to host arcitecture
+[ -C | --cloud ]: Configure container for use with meta-data service, defaults to no
+[ -T | --tarball ]: Location of tarball
+[ -d | --debug ]: Run with 'set -x' to debug errors
+[ -s | --stream]: Use specified stream rather than 'released'
+
+Options, mutually exclusive of "-C" and "--cloud":
+ [ -i | --hostid ]: HostID for cloud-init, defaults to random string
+ [ -u | --userdata ]: Cloud-init user-data file to configure container on start
+ [ -S | --auth-key ]: SSH Public key file to inject into container
+ [ -L | --nolocales ]: Do not copy host's locales into container
+
+EOF
+ return 0
+}
+
+options=$(getopt -o a:hp:r:n:Fi:CLS:T:ds: -l arch:,help,path:,release:,name:,flush-cache,hostid:,auth-key:,cloud,no_locales,tarball:,debug,stream:,userdata: -- "$@")
+if [ $? -ne 0 ]; then
+ usage $(basename $0)
+ exit 1
+fi
+eval set -- "$options"
+
+release=lucid
+if [ -f /etc/lsb-release ]; then
+ . /etc/lsb-release
+ case "$DISTRIB_CODENAME" in
+ lucid|natty|oneiric|precise|quantal)
+ release=$DISTRIB_CODENAME
+ ;;
+ esac
+fi
+
+arch=$(arch)
+
+# Code taken from debootstrap
+if [ -x /usr/bin/dpkg ] && /usr/bin/dpkg --print-architecture >/dev/null 2>&1; then
+ arch=`/usr/bin/dpkg --print-architecture`
+elif type udpkg >/dev/null 2>&1 && udpkg --print-architecture >/dev/null 2>&1; then
+ arch=`/usr/bin/udpkg --print-architecture`
+else
+ arch=$(arch)
+ if [ "$arch" = "i686" ]; then
+ arch="i386"
+ elif [ "$arch" = "x86_64" ]; then
+ arch="amd64"
+ elif [ "$arch" = "armv7l" ]; then
+ # note: arm images don't exist before oneiric; are called armhf in
+ # precise and later; and are not supported by the query, so we don't actually
+ # support them yet (see check later on). When Query2 is available,
+ # we'll use that to enable arm images.
+ arch="armel"
+ fi
+fi
+
+debug=0
+hostarch=$arch
+cloud=0
+locales=1
+flushcache=0
+stream="released"
+while true
+do
+ case "$1" in
+ -h|--help) usage $0 && exit 0;;
+ -p|--path) path=$2; shift 2;;
+ -n|--name) name=$2; shift 2;;
+ -F|--flush-cache) flushcache=1; shift 1;;
+ -r|--release) release=$2; shift 2;;
+ -a|--arch) arch=$2; shift 2;;
+ -i|--hostid) host_id=$2; shift 2;;
+ -u|--userdata) userdata=$2; shift 2;;
+ -C|--cloud) cloud=1; shift 1;;
+ -S|--auth-key) auth_key=$2; shift 2;;
+ -L|--no_locales) locales=0; shift 2;;
+ -T|--tarball) tarball=$2; shift 2;;
+ -d|--debug) debug=1; shift 1;;
+ -s|--stream) stream=$2; shift 2;;
+ --) 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 [ $arch != "i386" -a $arch != "amd64" ]; then
+ echo "Only i386 and amd64 are supported by the ubuntu cloud template."
+ exit 1
+fi
+
+if [ "$stream" != "daily" -a "$stream" != "released" ]; then
+ echo "Only 'daily' and 'released' streams are supported"
+ exit 1
+fi
+
+if [ -n "$userdata" ]; then
+ if [ ! -f "$userdata" ]; then
+ echo "Userdata ($userdata) does not exist"
+ exit 1
+ else
+ userdata=`readlink -f $userdata`
+ fi
+fi
+
+if [ -n "$auth_key" ]; then
+ if [ ! -f "$auth_key" ]; then
+ echo "--auth-key=${auth_key} must reference a file"
+ exit 1
+ fi
+ auth_key=$(readlink -f "${auth_key}") ||
+ { echo "failed to get full path for auth_key"; 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
+
+type ubuntu-cloudimg-query
+type wget
+
+# determine the url, tarball, and directory names
+# download if needed
+cache="/var/cache/lxc/cloud-$release"
+
+mkdir -p $cache
+
+if [ -n "$tarball" ]; then
+ url2="$tarball"
+else
+ url1=`ubuntu-cloudimg-query $release $stream $arch --format "%{url}\n"`
+ url2=`echo $url1 | sed -e 's/.tar.gz/-root\0/'`
+fi
+
+filename=`basename $url2`
+
+wgetcleanup()
+{
+ rm -f $filename
+}
+
+buildcleanup()
+{
+ cd $rootfs
+ umount -l $cache/$xdir || true
+ rm -rf $cache
+}
+
+# if the release doesn't have a *-rootfs.tar.gz, then create one from the
+# cloudimg.tar.gz by extracting the .img, mounting it loopback, and creating
+# a tarball from the mounted image.
+build_root_tgz()
+{
+ url=$1
+ filename=$2
+
+ xdir=`mktemp -d -p .`
+ tarname=`basename $url`
+ imgname="$release-*-cloudimg-$arch.img"
+ trap buildcleanup EXIT SIGHUP SIGINT SIGTERM
+ if [ $flushcache -eq 1 -o ! -f $cache/$tarname ]; then
+ rm -f $tarname
+ echo "Downloading cloud image from $url"
+ wget $url || { echo "Couldn't find cloud image $url."; exit 1; }
+ fi
+ echo "Creating new cached cloud image rootfs"
+ tar --wildcards -zxf $tarname $imgname
+ mount -o loop $imgname $xdir
+ (cd $xdir; tar zcf ../$filename .)
+ umount $xdir
+ rm -f $tarname $imgname
+ rmdir $xdir
+ echo "New cloud image cache created"
+ trap EXIT
+ trap SIGHUP
+ trap SIGINT
+ trap SIGTERM
+}
+
+mkdir -p /var/lock/subsys/
+(
+ flock -x 200
+
+ cd $cache
+ if [ $flushcache -eq 1 ]; then
+ echo "Clearing the cached images"
+ rm -f $filename
+ fi
+
+ trap wgetcleanup EXIT SIGHUP SIGINT SIGTERM
+ if [ ! -f $filename ]; then
+ wget $url2 || build_root_tgz $url1 $filename
+ fi
+ trap EXIT
+ trap SIGHUP
+ trap SIGINT
+ trap SIGTERM
+
+ echo "Extracting container rootfs"
+ mkdir -p $rootfs
+ cd $rootfs
+ tar -zxf $cache/$filename
+
+
+ if [ $cloud -eq 0 ]; then
+ echo "Configuring for running outside of a cloud environment"
+ echo "If you want to configure for a cloud evironment, please use '-- -C' to create the container"
+
+ seed_d=$rootfs/var/lib/cloud/seed/nocloud-net
+ rhostid=$(uuidgen | cut -c -8)
+ host_id=${hostid:-$rhostid}
+ mkdir -p $seed_d
+
+ cat > "$seed_d/meta-data" <<EOF
+instance-id: lxc-$host_id
+EOF
+ if [ -n "$auth_key" ]; then
+ {
+ echo "public-keys:" &&
+ sed -e '/^$/d' -e 's,^,- ,' "$auth_key" "$auth_key"
+ } >> "$seed_d/meta-data"
+ [ $? -eq 0 ] ||
+ { echo "failed to write public keys to metadata"; exit 1; }
+ fi
+
+ rm $rootfs/etc/hostname
+
+ if [ $locales -eq 1 ]; then
+ cp /usr/lib/locale/locale-archive $rootfs/usr/lib/locale/locale-archive
+ fi
+
+ if [ -f "$userdata" ]; then
+ echo "Using custom user-data"
+ cp $userdata $seed_d/user-data
+ else
+
+ if [ -z "$MIRROR" ]; then
+ MIRROR="http://archive.ubuntu.com/ubuntu"
+ fi
+
+ cat > "$seed_d/user-data" <<EOF
+#cloud-config
+output: {all: '| tee -a /var/log/cloud-init-output.log'}
+apt_mirror: $MIRROR
+manage_etc_hosts: localhost
+locale: $(/usr/bin/locale | awk -F= '/LANG=/ {print$NF}')
+password: ubuntu
+chpasswd: { expire: False }
+EOF
+ fi
+
+ else
+
+ echo "Configured for running in a cloud environment."
+ echo "If you do not have a meta-data service, this container will likely be useless."
+
+ fi
+) 200>/var/lock/subsys/lxc-ubucloud
+
+copy_configuration $path $rootfs $name $arch $release
+
+echo "Container $name created."
+exit 0
+
+# vi: ts=4 expandtab
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