3 # template script for generating ubuntu container for LXC based on released cloud
6 # Copyright © 2012 Serge Hallyn <serge.hallyn@canonical.com>
8 # This program is free software; you can redistribute it and/or modify
9 # it under the terms of the GNU General Public License version 2, as
10 # published by the Free Software Foundation.
12 # This program is distributed in the hope that it will be useful,
13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 # GNU General Public License for more details.
17 # You should have received a copy of the GNU General Public License along
18 # with this program; if not, write to the Free Software Foundation, Inc.,
19 # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
24 if [ -r /etc/default/lxc ]; then
36 if [ $arch = "i386" ]; then
40 # if there is exactly one veth network entry, make sure it has an
42 nics=`grep -e '^lxc\.network\.type[ \t]*=[ \t]*veth' $path/config | wc -l`
43 if [ $nics -eq 1 ]; then
44 grep -q "^lxc.network.hwaddr" $path/config || cat <<EOF >> $path/config
45 lxc.network.hwaddr = 00:16:3e:$(openssl rand -hex 3| sed 's/\(..\)/\1:/g; s/.$//')
49 cat <<EOF >> $path/config
55 lxc.mount = $path/fstab
57 lxc.cap.drop = sys_module mac_admin
58 lxc.pivotdir = lxc_putold
60 # uncomment the next line to run the container unconfined:
61 #lxc.aa_profile = unconfined
63 lxc.cgroup.devices.deny = a
64 # Allow any mknod (but not using the node)
65 lxc.cgroup.devices.allow = c *:* m
66 lxc.cgroup.devices.allow = b *:* m
68 lxc.cgroup.devices.allow = c 1:3 rwm
69 lxc.cgroup.devices.allow = c 1:5 rwm
71 lxc.cgroup.devices.allow = c 5:1 rwm
72 lxc.cgroup.devices.allow = c 5:0 rwm
73 #lxc.cgroup.devices.allow = c 4:0 rwm
74 #lxc.cgroup.devices.allow = c 4:1 rwm
76 lxc.cgroup.devices.allow = c 1:9 rwm
77 lxc.cgroup.devices.allow = c 1:8 rwm
78 lxc.cgroup.devices.allow = c 136:* rwm
79 lxc.cgroup.devices.allow = c 5:2 rwm
81 lxc.cgroup.devices.allow = c 254:0 rwm
83 lxc.cgroup.devices.allow = c 10:229 rwm
85 lxc.cgroup.devices.allow = c 10:200 rwm
87 lxc.cgroup.devices.allow = c 1:7 rwm
89 lxc.cgroup.devices.allow = c 10:228 rwm
91 lxc.cgroup.devices.allow = c 10:232 rwm
94 cat <<EOF > $path/fstab
95 proc proc proc nodev,noexec,nosuid 0 0
96 sysfs sys sysfs defaults 0 0
99 # rmdir /dev/shm for containers that have /run/shm
100 # I'm afraid of doing rm -rf $rootfs/dev/shm, in case it did
101 # get bind mounted to the host's /run/shm. So try to rmdir
102 # it, and in case that fails move it out of the way.
103 if [ ! -L $rootfs/dev/shm ] && [ -d $rootfs/run/shm ] && [ -e $rootfs/dev/shm ]; then
104 mv $rootfs/dev/shm $rootfs/dev/shm.bak
105 ln -s /run/shm $rootfs/dev/shm
114 LXC Container configuration for Ubuntu Cloud images.
117 [ -r | --release <release> ]: Release name of container, defaults to host
118 [ -a | --arch ]: Arhcitecture of container, defaults to host arcitecture
119 [ -C | --cloud ]: Configure container for use with meta-data service, defaults to no
120 [ -T | --tarball ]: Location of tarball
121 [ -d | --debug ]: Run with 'set -x' to debug errors
122 [ -s | --stream]: Use specified stream rather than 'released'
124 Options, mutually exclusive of "-C" and "--cloud":
125 [ -i | --hostid ]: HostID for cloud-init, defaults to random string
126 [ -u | --userdata ]: Cloud-init user-data file to configure container on start
127 [ -S | --auth-key ]: SSH Public key file to inject into container
128 [ -L | --nolocales ]: Do not copy host's locales into container
134 options=$(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: -- "$@")
135 if [ $? -ne 0 ]; then
139 eval set -- "$options"
142 if [ -f /etc/lsb-release ]; then
144 case "$DISTRIB_CODENAME" in
145 lucid|maverick|natty|oneiric|precise)
146 release=$DISTRIB_CODENAME
153 # Code taken from debootstrap
154 if [ -x /usr/bin/dpkg ] && /usr/bin/dpkg --print-architecture >/dev/null 2>&1; then
155 arch=`/usr/bin/dpkg --print-architecture`
156 elif type udpkg >/dev/null 2>&1 && udpkg --print-architecture >/dev/null 2>&1; then
157 arch=`/usr/bin/udpkg --print-architecture`
160 if [ "$arch" = "i686" ]; then
162 elif [ "$arch" = "x86_64" ]; then
164 elif [ "$arch" = "armv7l" ]; then
165 # note: arm images don't exist before oneiric; are called armhf in
166 # precise; and are not supported by the query, so we don't actually
167 # support them yet (see check later on). When Query2 is available,
168 # we'll use that to enable arm images.
182 -h|--help) usage $0 && exit 0;;
183 -p|--path) path=$2; shift 2;;
184 -n|--name) name=$2; shift 2;;
185 -F|--flush-cache) flushcache=1; shift 1;;
186 -r|--release) release=$2; shift 2;;
187 -a|--arch) arch=$2; shift 2;;
188 -i|--hostid) host_id=$2; shift 2;;
189 -u|--userdata) userdata=$2; shift 2;;
190 -C|--cloud) cloud=1; shift 1;;
191 -S|--auth-key) auth_key=$2; shift 2;;
192 -L|--no_locales) locales=0; shift 2;;
193 -T|--tarball) tarball=$2; shift 2;;
194 -d|--debug) debug=1; shift 1;;
195 -s|--stream) stream=$2; shift 2;;
196 --) shift 1; break ;;
201 if [ $debug -eq 1 ]; then
205 if [ "$arch" == "i686" ]; then
209 if [ $hostarch = "i386" -a $arch = "amd64" ]; then
210 echo "can't create amd64 container on i386"
214 if [ $arch != "i386" -a $arch != "amd64" ]; then
215 echo "Only i386 and amd64 are supported by the ubuntu cloud template."
219 if [ "$stream" != "daily" -a "$stream" != "released" ]; then
220 echo "Only 'daily' and 'released' streams are supported"
224 if [ -n "$userdata" -a ! -f "$userdata" ]; then
225 echo "Userdata does not exist"
229 if [ -z "$path" ]; then
230 echo "'path' parameter is required"
234 if [ "$(id -u)" != "0" ]; then
235 echo "This script should be run as 'root'"
241 type ubuntu-cloudimg-query
244 # determine the url, tarball, and directory names
246 cache="/var/cache/lxc/cloud-$release"
250 if [ -n "$tarball" ]; then
253 url1=`ubuntu-cloudimg-query $release $stream $arch --format "%{url}\n"`
254 url2=`echo $url1 | sed -e 's/.tar.gz/-root\0/'`
257 filename=`basename $url2`
262 umount -l $cache/$xdir || true
266 # if the release doesn't have a *-rootfs.tar.gz, then create one from the
267 # cloudimg.tar.gz by extracting the .img, mounting it loopback, and creating
268 # a tarball from the mounted image.
274 xdir=`mktemp -d -p .`
275 tarname=`basename $url`
276 imgname="$release-*-cloudimg-$arch.img"
277 trap buildcleanup EXIT
278 if [ $flushcache -eq 1 -o ! -f $cache/$tarname ]; then
280 echo "Downloading cloud image from $url"
281 wget $url || { echo "Couldn't find cloud image $url."; exit 1; }
283 echo "Creating new cached cloud image rootfs"
284 tar --wildcards -zxf $tarname $imgname
285 mount -o loop $imgname $xdir
286 (cd $xdir; tar zcf ../$filename .)
288 rm -f $tarname $imgname
290 echo "New cloud image cache created"
294 mkdir -p /var/lock/subsys/
299 if [ $flushcache -eq 1 ]; then
300 echo "Clearing the cached images"
304 if [ ! -f $filename ]; then
305 wget $url2 || build_root_tgz $url1 $filename
308 echo "Extracting container rootfs"
311 tar -zxf $cache/$filename
314 if [ $cloud -eq 0 ]; then
315 echo "Configuring for running outside of a cloud environment"
316 echo "If you want to configure for a cloud evironment, please use '-- -C' to create the container"
318 seed_d=$rootfs/var/lib/cloud/seed/nocloud-net
319 rhostid=$(uuidgen | cut -c -8)
320 host_id=${hostid:-$rhostid}
323 cat > "$seed_d/meta-data" <<EOF
324 instance_id: lxc-$host_id
327 rm $rootfs/etc/hostname
329 if [ $locales -eq 1 ]; then
330 cp /usr/lib/locale/locale-archive $rootfs/usr/lib/locale/locale-archive
334 if [ -n "$auth_key" -a -f "$auth_key" ]; then
335 u_path="/home/ubuntu/.ssh"
336 root_u_path="$rootfs/$u_path"
337 mkdir -p $root_u_path
338 cp $auth_key "$root_u_path/authorized_keys"
339 chroot $rootfs chown -R ubuntu: "$u_path"
341 echo "Inserted SSH public key from $auth_key into /home/ubuntu/.ssh/authorized_keys"
344 if [ -f "$userdata" ]; then
345 echo "Using custom user-data"
346 cp $userdata $seed_d/user-data
349 if [ -z "$MIRROR" ]; then
350 MIRROR="http://archive.ubuntu.com/ubuntu"
353 cat > "$seed_d/user-data" <<EOF
355 output: {all: '| tee -a /var/log/cloud-init-output.log'}
357 manage_etc_hosts: localhost
358 locale: $(/usr/bin/locale | awk -F= '/LANG=/ {print$NF}')
362 chroot $rootfs /usr/sbin/usermod -U ubuntu
363 echo "ubuntu:ubuntu" | chroot $rootfs chpasswd
364 echo "Please login as user ubuntu with password ubuntu."
368 echo "Configured for running in a cloud environment."
369 echo "If you do not have a meta-data service, this container will likely be useless."
373 ) 200>/var/lock/subsys/lxc-ubucloud
375 copy_configuration $path $rootfs $name $arch $release
377 echo "Container $name created."