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d1458ac8 SH |
1 | #!/bin/bash |
2 | ||
3eecde70 | 3 | # template script for generating ubuntu container for LXC based on released cloud |
d1458ac8 SH |
4 | # images |
5 | # | |
6 | # Copyright © 2012 Serge Hallyn <serge.hallyn@canonical.com> | |
7 | # | |
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. | |
11 | ||
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. | |
16 | ||
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. | |
20 | # | |
21 | ||
22 | set -e | |
23 | ||
24 | if [ -r /etc/default/lxc ]; then | |
25 | . /etc/default/lxc | |
26 | fi | |
27 | ||
28 | copy_configuration() | |
29 | { | |
30 | path=$1 | |
31 | rootfs=$2 | |
32 | name=$3 | |
33 | arch=$4 | |
34 | ||
35 | if [ $arch = "i386" ]; then | |
36 | arch="i686" | |
37 | fi | |
38 | ||
4759162d SH |
39 | # if there is exactly one veth network entry, make sure it has an |
40 | # associated hwaddr. | |
41 | nics=`grep -e '^lxc\.network\.type[ \t]*=[ \t]*veth' $path/config | wc -l` | |
42 | if [ $nics -eq 1 ]; then | |
43 | grep -q "^lxc.network.hwaddr" $path/config || cat <<EOF >> $path/config | |
44 | lxc.network.hwaddr= 00:16:3e:$(openssl rand -hex 3| sed 's/\(..\)/\1:/g; s/.$//') | |
45 | EOF | |
46 | fi | |
47 | ||
d1458ac8 SH |
48 | cat <<EOF >> $path/config |
49 | lxc.utsname = $name | |
50 | ||
51 | lxc.tty = 4 | |
52 | lxc.pts = 1024 | |
53 | lxc.rootfs = $rootfs | |
54 | lxc.mount = $path/fstab | |
55 | lxc.arch = $arch | |
56 | lxc.cap.drop = sys_module mac_admin | |
57 | ||
58 | lxc.cgroup.devices.deny = a | |
59 | # Allow any mknod (but not using the node) | |
60 | lxc.cgroup.devices.allow = c *:* m | |
61 | lxc.cgroup.devices.allow = b *:* m | |
62 | # /dev/null and zero | |
63 | lxc.cgroup.devices.allow = c 1:3 rwm | |
64 | lxc.cgroup.devices.allow = c 1:5 rwm | |
65 | # consoles | |
66 | lxc.cgroup.devices.allow = c 5:1 rwm | |
67 | lxc.cgroup.devices.allow = c 5:0 rwm | |
68 | #lxc.cgroup.devices.allow = c 4:0 rwm | |
69 | #lxc.cgroup.devices.allow = c 4:1 rwm | |
70 | # /dev/{,u}random | |
71 | lxc.cgroup.devices.allow = c 1:9 rwm | |
72 | lxc.cgroup.devices.allow = c 1:8 rwm | |
73 | lxc.cgroup.devices.allow = c 136:* rwm | |
74 | lxc.cgroup.devices.allow = c 5:2 rwm | |
75 | # rtc | |
76 | lxc.cgroup.devices.allow = c 254:0 rwm | |
77 | #fuse | |
78 | lxc.cgroup.devices.allow = c 10:229 rwm | |
79 | #tun | |
80 | lxc.cgroup.devices.allow = c 10:200 rwm | |
81 | #full | |
82 | lxc.cgroup.devices.allow = c 1:7 rwm | |
83 | #hpet | |
84 | lxc.cgroup.devices.allow = c 10:228 rwm | |
85 | #kvm | |
86 | lxc.cgroup.devices.allow = c 10:232 rwm | |
87 | EOF | |
88 | ||
89 | cat <<EOF > $path/fstab | |
90 | proc $rootfs/proc proc nodev,noexec,nosuid 0 0 | |
91 | sysfs $rootfs/sys sysfs defaults 0 0 | |
92 | EOF | |
93 | ||
94 | return 0 | |
95 | } | |
96 | ||
97 | usage() | |
98 | { | |
99 | cat <<EOF | |
4759162d SH |
100 | LXC Container configuration for Ubuntu Cloud images. |
101 | ||
102 | Generic Options | |
103 | [ -r | --release <release> ]: Release name of container, defaults to host | |
104 | [ -a | --arch ]: Arhcitecture of container, defaults to host arcitecture | |
105 | [ -C | --cloud ]: Configure container for use with meta-data service, defaults to no | |
106 | [ -T | --tarball ]: Location of tarball | |
52c8f624 | 107 | [ -d | --debug ]: Run with 'set -x' to debug errors |
4759162d SH |
108 | |
109 | Options, mutually exclusive of "-C" and "--cloud": | |
110 | [ -i | --hostid ]: HostID for cloud-init, defaults to random string | |
111 | [ -u | --userdata ]: Cloud-init user-data file to configure container on start | |
52c8f624 | 112 | [ -S | --auth-key ]: SSH Public key file to inject into container |
4759162d SH |
113 | [ -L | --nolocales ]: Do not copy host's locales into container |
114 | ||
d1458ac8 SH |
115 | EOF |
116 | return 0 | |
117 | } | |
118 | ||
52c8f624 | 119 | options=$(getopt -o a:hp:r:n:Fi:CLS:T:d -l arch:,help,path:,release:,name:,flush-cache,hostid:,auth-key:,cloud,no_locales,tarball:,debug -- "$@") |
d1458ac8 SH |
120 | if [ $? -ne 0 ]; then |
121 | usage $(basename $0) | |
122 | exit 1 | |
123 | fi | |
124 | eval set -- "$options" | |
125 | ||
126 | release=lucid | |
127 | if [ -f /etc/lsb-release ]; then | |
128 | . /etc/lsb-release | |
129 | case "$DISTRIB_CODENAME" in | |
130 | lucid|maverick|natty|oneiric|precise) | |
131 | release=$DISTRIB_CODENAME | |
132 | ;; | |
133 | esac | |
134 | fi | |
135 | ||
136 | arch=$(arch) | |
137 | ||
138 | # Code taken from debootstrap | |
139 | if [ -x /usr/bin/dpkg ] && /usr/bin/dpkg --print-architecture >/dev/null 2>&1; then | |
140 | arch=`/usr/bin/dpkg --print-architecture` | |
141 | elif type udpkg >/dev/null 2>&1 && udpkg --print-architecture >/dev/null 2>&1; then | |
142 | arch=`/usr/bin/udpkg --print-architecture` | |
143 | else | |
144 | arch=$(arch) | |
145 | if [ "$arch" = "i686" ]; then | |
146 | arch="i386" | |
147 | elif [ "$arch" = "x86_64" ]; then | |
148 | arch="amd64" | |
149 | elif [ "$arch" = "armv7l" ]; then | |
3eecde70 SH |
150 | # note: arm images don't exist before oneiric; are called armhf in |
151 | # precise; and are not supported by the query, so we don't actually | |
152 | # support them yet (see check later on). When Query2 is available, | |
153 | # we'll use that to enable arm images. | |
d1458ac8 SH |
154 | arch="armel" |
155 | fi | |
156 | fi | |
157 | ||
52c8f624 | 158 | debug=0 |
d1458ac8 SH |
159 | hostarch=$arch |
160 | cloud=0 | |
4759162d | 161 | locales=1 |
d1458ac8 SH |
162 | flushcache=0 |
163 | while true | |
164 | do | |
165 | case "$1" in | |
4759162d SH |
166 | -h|--help) usage $0 && exit 0;; |
167 | -p|--path) path=$2; shift 2;; | |
168 | -n|--name) name=$2; shift 2;; | |
169 | -F|--flush-cache) flushcache=1; shift 1;; | |
170 | -r|--release) release=$2; shift 2;; | |
171 | -a|--arch) arch=$2; shift 2;; | |
172 | -i|--hostid) host_id=$2; shift 2;; | |
173 | -u|--userdata) userdata=$2; shift 2;; | |
174 | -C|--cloud) cloud=1; shift 1;; | |
52c8f624 | 175 | -S|--auth-key) auth_key=$2; shift 2;; |
4759162d SH |
176 | -L|--no_locales) locales=0; shift 2;; |
177 | -T|--tarball) tarball=$2; shift 2;; | |
52c8f624 | 178 | -d|--debug) debug=1; shift 1;; |
4759162d | 179 | --) shift 1; break ;; |
d1458ac8 SH |
180 | *) break ;; |
181 | esac | |
182 | done | |
183 | ||
3eecde70 | 184 | if [ $debug -eq 1 ]; then |
52c8f624 SH |
185 | set -x |
186 | fi | |
187 | ||
d1458ac8 SH |
188 | if [ "$arch" == "i686" ]; then |
189 | arch=i386 | |
190 | fi | |
191 | ||
192 | if [ $hostarch = "i386" -a $arch = "amd64" ]; then | |
193 | echo "can't create amd64 container on i386" | |
194 | exit 1 | |
195 | fi | |
196 | ||
197 | if [ $arch != "i386" -a $arch != "amd64" ]; then | |
198 | echo "Only i386 and amd64 are supported by the ubuntu cloud template." | |
199 | exit 1 | |
200 | fi | |
201 | ||
202 | if [ -z "$path" ]; then | |
203 | echo "'path' parameter is required" | |
204 | exit 1 | |
205 | fi | |
206 | ||
207 | if [ "$(id -u)" != "0" ]; then | |
208 | echo "This script should be run as 'root'" | |
209 | exit 1 | |
210 | fi | |
211 | ||
212 | rootfs=$path/rootfs | |
213 | ||
214 | type ubuntu-cloudimg-query | |
215 | type wget | |
216 | ||
217 | # determine the url, tarball, and directory names | |
218 | # download if needed | |
219 | cache="/var/cache/lxc/cloud-$release" | |
220 | ||
221 | mkdir -p $cache | |
222 | ||
4759162d SH |
223 | if [ -n "$tarball" ]; then |
224 | url2="$tarball" | |
225 | else | |
3eecde70 | 226 | url1=`ubuntu-cloudimg-query $release released $arch --format "%{url}\n"` |
4759162d SH |
227 | url2=`echo $url1 | sed -e 's/.tar.gz/-root\0/'` |
228 | fi | |
229 | ||
d1458ac8 SH |
230 | filename=`basename $url2` |
231 | ||
3eecde70 SH |
232 | buildcleanup() |
233 | { | |
234 | cd $rootfs | |
235 | umount -l $cache/$xdir || true | |
236 | rm -rf $cache | |
237 | } | |
238 | ||
239 | # if the release doesn't have a *-rootfs.tar.gz, then create one from the | |
240 | # cloudimg.tar.gz by extracting the .img, mounting it loopback, and creating | |
241 | # a tarball from the mounted image. | |
242 | build_root_tgz() | |
243 | { | |
244 | url=$1 | |
245 | filename=$2 | |
246 | ||
247 | xdir=`mktemp -d -p .` | |
248 | tarname=`basename $url` | |
249 | imgname="`basename $tarname .tar.gz`.img" | |
250 | trap buildcleanup EXIT | |
251 | if [ $flushcache -eq 1 -o ! -f $cache/$tarname ]; then | |
252 | rm -f $tarname | |
253 | echo "Downloading cloud image from $url" | |
254 | wget $url || { echo "Couldn't find cloud image $url."; exit 1; } | |
255 | fi | |
256 | echo "Creating new cached cloud image rootfs" | |
257 | tar zxf $tarname $imgname | |
258 | mount -o loop $imgname $xdir | |
259 | (cd $xdir; tar zcf ../$filename .) | |
260 | umount $xdir | |
261 | rm -f $tarname $imgname | |
262 | rmdir $xdir | |
263 | echo "New cloud image cache created" | |
264 | trap EXIT | |
265 | } | |
266 | ||
d1458ac8 SH |
267 | mkdir -p /var/lock/subsys/ |
268 | ( | |
269 | flock -n -x 200 | |
270 | ||
271 | cd $cache | |
272 | if [ $flushcache -eq 1 ]; then | |
273 | echo "Clearing the cached images" | |
274 | rm -f $filename | |
275 | fi | |
276 | ||
277 | if [ ! -f $filename ]; then | |
3eecde70 | 278 | wget $url2 || build_root_tgz $url1 $filename |
d1458ac8 SH |
279 | fi |
280 | ||
3eecde70 | 281 | echo "Extracting container rootfs" |
d1458ac8 SH |
282 | mkdir -p $rootfs |
283 | cd $rootfs | |
284 | tar -zxf $cache/$filename | |
285 | ||
286 | ||
287 | if [ $cloud -eq 0 ]; then | |
288 | echo "Configuring for running outside of a cloud environment" | |
289 | echo "If you want to configure for a cloud evironment, please use '-- -C' to create the container" | |
290 | ||
291 | seed_d=$rootfs/var/lib/cloud/seed/nocloud-net | |
292 | rhostid=$(uuidgen | cut -c -8) | |
4759162d SH |
293 | host_id=${hostid:-$rhostid} |
294 | mkdir -p $seed_d | |
d1458ac8 SH |
295 | |
296 | cat > "$seed_d/meta-data" <<EOF | |
297 | instance_id: lxc-$host_id | |
298 | EOF | |
299 | ||
4759162d SH |
300 | rm $rootfs/etc/hostname |
301 | ||
302 | if [ $locales -eq 1 ]; then | |
303 | cp /usr/lib/locale/locale-archive $rootfs/usr/lib/locale/locale-archive | |
304 | fi | |
305 | ||
306 | ||
307 | if [ -n "$auth_key" -a -f "$auth_key" ]; then | |
308 | u_path="/home/ubuntu/.ssh" | |
309 | root_u_path="$rootfs/$u_path" | |
310 | mkdir -p $root_u_path | |
311 | cp $auth_key "$root_u_path/authorized_keys" | |
312 | chroot $rootfs chown -R ubuntu: "$u_path" | |
313 | ||
314 | echo "Inserted SSH public key from $auth_key into /home/ubuntu/.ssh/authorized_keys" | |
315 | fi | |
316 | ||
d1458ac8 | 317 | if [ ! -f $userdata ]; then |
4759162d | 318 | cp $userdata $data_d/user-data |
d1458ac8 | 319 | else |
4759162d | 320 | |
d1458ac8 SH |
321 | if [ -z "$MIRROR" ]; then |
322 | MIRROR="http://archive.ubuntu.com/ubuntu" | |
323 | fi | |
4759162d SH |
324 | |
325 | cat > "$seed_d/user-data" <<EOF | |
326 | #cloud-config | |
327 | output: {all: '| tee -a /var/log/cloud-init-output.log'} | |
328 | apt-mirror: $MIRROR | |
329 | manage_etc_hosts: localhost | |
330 | locale: $(/usr/bin/locale | awk -F= '/LANG=/ {print$NF}') | |
331 | EOF | |
332 | ||
d1458ac8 SH |
333 | fi |
334 | ||
335 | chroot $rootfs /usr/sbin/usermod -U ubuntu | |
3eecde70 | 336 | echo "ubuntu:ubuntu" | chroot $rootfs chpasswd |
d1458ac8 SH |
337 | echo "Please login as user ubuntu with password ubuntu." |
338 | ||
339 | else | |
340 | ||
341 | echo "Configured for running in a cloud environment." | |
342 | echo "If you do not have a meta-data service, this container will likely be useless." | |
343 | ||
344 | fi | |
345 | ||
346 | ) 200>/var/lock/subsys/lxc-ubucloud | |
347 | ||
348 | copy_configuration $path $rootfs $name $arch | |
349 | ||
350 | echo "Container $name created." | |
351 | exit 0 |