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d1458ac8 SH |
1 | #!/bin/bash |
2 | ||
65d8ae9c SM |
3 | # template script for generating ubuntu container for LXC based on released |
4 | # cloud images. | |
d1458ac8 SH |
5 | # |
6 | # Copyright © 2012 Serge Hallyn <serge.hallyn@canonical.com> | |
7 | # | |
acbb59f5 SH |
8 | # This library is free software; you can redistribute it and/or |
9 | # modify it under the terms of the GNU Lesser General Public | |
10 | # License as published by the Free Software Foundation; either | |
11 | # version 2.1 of the License, or (at your option) any later version. | |
d1458ac8 | 12 | |
acbb59f5 SH |
13 | # This library is distributed in the hope that it will be useful, |
14 | # but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | # Lesser General Public License for more details. | |
d1458ac8 | 17 | |
acbb59f5 SH |
18 | # You should have received a copy of the GNU Lesser General Public |
19 | # License along with this library; if not, write to the Free Software | |
20 | # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
d1458ac8 SH |
21 | |
22 | set -e | |
23 | ||
65d8ae9c SM |
24 | STATE_DIR="@LOCALSTATEDIR@" |
25 | HOOK_DIR="@LXCHOOKDIR@" | |
26 | CLONE_HOOK_FN="$HOOK_DIR/ubuntu-cloud-prep" | |
f2a95ee1 | 27 | LXC_TEMPLATE_CONFIG="@LXCTEMPLATECONFIG@" |
0815a592 | 28 | KNOWN_RELEASES="precise trusty xenial yakkety zesty" |
ad3f14ab | 29 | skip_arch_check=${UCTEMPLATE_SKIP_ARCH_CHECK:-0} |
65d8ae9c | 30 | |
207bf0e4 SG |
31 | # Make sure the usual locations are in PATH |
32 | export PATH=$PATH:/usr/sbin:/usr/bin:/sbin:/bin | |
33 | ||
d1458ac8 SH |
34 | if [ -r /etc/default/lxc ]; then |
35 | . /etc/default/lxc | |
36 | fi | |
37 | ||
1aad9e44 SH |
38 | am_in_userns() { |
39 | [ -e /proc/self/uid_map ] || { echo no; return; } | |
40 | [ "$(wc -l /proc/self/uid_map | awk '{ print $1 }')" -eq 1 ] || { echo yes; return; } | |
41 | line=$(awk '{ print $1 " " $2 " " $3 }' /proc/self/uid_map) | |
42 | [ "$line" = "0 0 4294967295" ] && { echo no; return; } | |
43 | echo yes | |
44 | } | |
45 | ||
46 | in_userns=0 | |
47 | [ $(am_in_userns) = "yes" ] && in_userns=1 | |
1aad9e44 | 48 | |
d1458ac8 SH |
49 | copy_configuration() |
50 | { | |
51 | path=$1 | |
52 | rootfs=$2 | |
53 | name=$3 | |
54 | arch=$4 | |
42ff5f0f | 55 | release=$5 |
d1458ac8 SH |
56 | |
57 | if [ $arch = "i386" ]; then | |
58 | arch="i686" | |
59 | fi | |
60 | ||
4759162d SH |
61 | # if there is exactly one veth network entry, make sure it has an |
62 | # associated hwaddr. | |
7fa3f2e9 | 63 | nics=`grep -e '^lxc\.net\.0\.type[ \t]*=[ \t]*veth' $path/config | wc -l` |
4759162d | 64 | if [ $nics -eq 1 ]; then |
7fa3f2e9 | 65 | grep -q "^lxc.net.0.hwaddr" $path/config || sed -i -e "/^lxc\.net\.0\.type[ \t]*=[ \t]*veth/a lxc.net.0.hwaddr = 00:16:3e:$(openssl rand -hex 3| sed 's/\(..\)/\1:/g; s/.$//')" $path/config |
4759162d SH |
66 | fi |
67 | ||
f2a95ee1 | 68 | # Generate the configuration file |
f2a95ee1 | 69 | ## Relocate all the network config entries |
7fa3f2e9 | 70 | sed -i -e "/lxc.net.0/{w ${path}/config-network" -e "d}" $path/config |
9313e1e6 | 71 | |
f2a95ee1 SG |
72 | ## Relocate any other config entries |
73 | sed -i -e "/lxc./{w ${path}/config-auto" -e "d}" $path/config | |
f02ce27d | 74 | |
f2a95ee1 SG |
75 | ## Add all the includes |
76 | echo "" >> $path/config | |
77 | echo "# Common configuration" >> $path/config | |
78 | if [ -e "${LXC_TEMPLATE_CONFIG}/ubuntu-cloud.common.conf" ]; then | |
79 | echo "lxc.include = ${LXC_TEMPLATE_CONFIG}/ubuntu-cloud.common.conf" >> $path/config | |
80 | fi | |
81 | if [ -e "${LXC_TEMPLATE_CONFIG}/ubuntu-cloud.${release}.conf" ]; then | |
82 | echo "lxc.include = ${LXC_TEMPLATE_CONFIG}/ubuntu-cloud.${release}.conf" >> $path/config | |
83 | fi | |
84 | if [ $in_userns -eq 1 ] && [ -e "${LXC_TEMPLATE_CONFIG}/ubuntu-cloud.userns.conf" ]; then | |
85 | echo "lxc.include = ${LXC_TEMPLATE_CONFIG}/ubuntu-cloud.userns.conf" >> $path/config | |
57d116ab | 86 | fi |
d1458ac8 | 87 | |
f2a95ee1 SG |
88 | ## Add the container-specific config |
89 | echo "" >> $path/config | |
90 | echo "# Container specific configuration" >> $path/config | |
91 | [ -e "$path/config-auto" ] && cat $path/config-auto >> $path/config && rm $path/config-auto | |
7a96a068 | 92 | grep -q "^lxc.rootfs.path" $path/config 2>/dev/null || echo "lxc.rootfs.path = $rootfs" >> $path/config |
f2a95ee1 | 93 | cat <<EOF >> $path/config |
b67771bc | 94 | lxc.uts.name = $name |
f2a95ee1 | 95 | lxc.arch = $arch |
bf7d76cf | 96 | EOF |
d1458ac8 | 97 | |
f2a95ee1 SG |
98 | ## Re-add the previously removed network config |
99 | echo "" >> $path/config | |
100 | echo "# Network configuration" >> $path/config | |
101 | cat $path/config-network >> $path/config | |
102 | rm $path/config-network | |
1aad9e44 | 103 | |
0a3673e8 SG |
104 | # Set initial timezone as on host |
105 | if [ -f /etc/timezone ]; then | |
106 | cat /etc/timezone > $rootfs/etc/timezone | |
107 | chroot $rootfs dpkg-reconfigure -f noninteractive tzdata | |
108 | elif [ -f /etc/sysconfig/clock ]; then | |
17abf278 | 109 | . /etc/sysconfig/clock |
0a3673e8 SG |
110 | echo $ZONE > $rootfs/etc/timezone |
111 | chroot $rootfs dpkg-reconfigure -f noninteractive tzdata | |
112 | else | |
113 | echo "Timezone in container is not configured. Adjust it manually." | |
114 | fi | |
115 | ||
542939c3 | 116 | # rmdir /dev/shm for containers that have /run/shm |
42ff5f0f SH |
117 | # I'm afraid of doing rm -rf $rootfs/dev/shm, in case it did |
118 | # get bind mounted to the host's /run/shm. So try to rmdir | |
119 | # it, and in case that fails move it out of the way. | |
5ff33774 | 120 | # NOTE: This can only be removed once 12.04 goes out of support |
68c36a30 | 121 | if [ ! -L $rootfs/dev/shm ] && [ -e $rootfs/dev/shm ]; then |
5ff33774 | 122 | rmdir $rootfs/dev/shm 2>/dev/null || mv $rootfs/dev/shm $rootfs/dev/shm.bak |
42ff5f0f SH |
123 | ln -s /run/shm $rootfs/dev/shm |
124 | fi | |
125 | ||
d1458ac8 SH |
126 | return 0 |
127 | } | |
128 | ||
129 | usage() | |
130 | { | |
131 | cat <<EOF | |
4759162d SH |
132 | LXC Container configuration for Ubuntu Cloud images. |
133 | ||
134 | Generic Options | |
135 | [ -r | --release <release> ]: Release name of container, defaults to host | |
1897e3bc | 136 | [ --rootfs <path> ]: Path in which rootfs will be placed |
3f5f5d99 | 137 | [ -a | --arch ]: Architecture of container, defaults to host architecture |
4759162d | 138 | [ -T | --tarball ]: Location of tarball |
52c8f624 | 139 | [ -d | --debug ]: Run with 'set -x' to debug errors |
ad3f14ab | 140 | [ -s | --stream]: Use specified stream rather than 'tryreleased' |
4759162d | 141 | |
65d8ae9c SM |
142 | Additionally, clone hooks can be passed through (ie, --userdata). For those, |
143 | see: | |
144 | $CLONE_HOOK_FN --help | |
d1458ac8 SH |
145 | EOF |
146 | return 0 | |
147 | } | |
148 | ||
5d066f24 | 149 | options=$(getopt -o a:hp:r:n:Fi:CLS:T:ds:u: -l arch:,help,rootfs:,path:,release:,name:,flush-cache,hostid:,auth-key:,cloud,no_locales,tarball:,debug,stream:,userdata:,vendordata:,mapped-uid:,mapped-gid: -- "$@") |
d1458ac8 SH |
150 | if [ $? -ne 0 ]; then |
151 | usage $(basename $0) | |
152 | exit 1 | |
153 | fi | |
154 | eval set -- "$options" | |
155 | ||
57d116ab | 156 | mapped_uid=-1 |
2133f58c | 157 | mapped_gid=-1 |
f8b2a49c SG |
158 | # default release is trusty, or the systems release if recognized |
159 | release=trusty | |
d1458ac8 SH |
160 | if [ -f /etc/lsb-release ]; then |
161 | . /etc/lsb-release | |
65d8ae9c | 162 | rels=$(ubuntu-distro-info --supported 2>/dev/null) || |
ad3f14ab | 163 | rels="$KNOWN_RELEASES" |
65d8ae9c SM |
164 | for r in $rels; do |
165 | [ "$DISTRIB_CODENAME" = "$r" ] && release="$r" | |
166 | done | |
d1458ac8 SH |
167 | fi |
168 | ||
d1458ac8 SH |
169 | # Code taken from debootstrap |
170 | if [ -x /usr/bin/dpkg ] && /usr/bin/dpkg --print-architecture >/dev/null 2>&1; then | |
171 | arch=`/usr/bin/dpkg --print-architecture` | |
172 | elif type udpkg >/dev/null 2>&1 && udpkg --print-architecture >/dev/null 2>&1; then | |
173 | arch=`/usr/bin/udpkg --print-architecture` | |
174 | else | |
ed4616b1 | 175 | arch=$(uname -m) |
d1458ac8 SH |
176 | if [ "$arch" = "i686" ]; then |
177 | arch="i386" | |
178 | elif [ "$arch" = "x86_64" ]; then | |
179 | arch="amd64" | |
180 | elif [ "$arch" = "armv7l" ]; then | |
3eecde70 | 181 | # note: arm images don't exist before oneiric; are called armhf in |
f8b2a49c | 182 | # trusty and later; and are not supported by the query, so we don't actually |
3eecde70 SH |
183 | # support them yet (see check later on). When Query2 is available, |
184 | # we'll use that to enable arm images. | |
8a63c0a9 | 185 | arch="armhf" |
8a3c76b2 SG |
186 | elif [ "$arch" = "aarch64" ]; then |
187 | arch="arm64" | |
188 | elif [ "$arch" = "ppc64le" ]; then | |
189 | arch="ppc64el" | |
d1458ac8 SH |
190 | fi |
191 | fi | |
192 | ||
52c8f624 | 193 | debug=0 |
d1458ac8 SH |
194 | hostarch=$arch |
195 | cloud=0 | |
4759162d | 196 | locales=1 |
d1458ac8 | 197 | flushcache=0 |
4b954f12 | 198 | stream="tryreleased" |
65d8ae9c | 199 | cloneargs=() |
d1458ac8 SH |
200 | while true |
201 | do | |
202 | case "$1" in | |
4a311045 | 203 | -h|--help) usage $0 && exit 1;; |
4759162d SH |
204 | -p|--path) path=$2; shift 2;; |
205 | -n|--name) name=$2; shift 2;; | |
206 | -F|--flush-cache) flushcache=1; shift 1;; | |
207 | -r|--release) release=$2; shift 2;; | |
208 | -a|--arch) arch=$2; shift 2;; | |
4759162d | 209 | -T|--tarball) tarball=$2; shift 2;; |
52c8f624 | 210 | -d|--debug) debug=1; shift 1;; |
427bffc7 | 211 | -s|--stream) stream=$2; shift 2;; |
65d8ae9c SM |
212 | --rootfs) rootfs=$2; shift 2;; |
213 | -L|--no?locales) cloneargs[${#cloneargs[@]}]="--no-locales"; shift 1;; | |
214 | -i|--hostid) cloneargs[${#cloneargs[@]}]="--hostid=$2"; shift 2;; | |
215 | -u|--userdata) cloneargs[${#cloneargs[@]}]="--userdata=$2"; shift 2;; | |
5d066f24 | 216 | -V|--vendordata) cloneargs[${#cloneargs[@]}]="--vendordata=$2"; shift 2;; |
65d8ae9c SM |
217 | -C|--cloud) cloneargs[${#cloneargs[@]}]="--cloud"; shift 1;; |
218 | -S|--auth-key) cloneargs[${#cloneargs[@]}]="--auth-key=$2"; shift 2;; | |
57d116ab | 219 | --mapped-uid) mapped_uid=$2; shift 2;; |
2133f58c | 220 | --mapped-gid) mapped_gid=$2; shift 2;; |
4759162d | 221 | --) shift 1; break ;; |
d1458ac8 SH |
222 | *) break ;; |
223 | esac | |
224 | done | |
225 | ||
65d8ae9c SM |
226 | cloneargs=( "--name=$name" "${cloneargs[@]}" ) |
227 | ||
3eecde70 | 228 | if [ $debug -eq 1 ]; then |
52c8f624 SH |
229 | set -x |
230 | fi | |
231 | ||
17abf278 | 232 | if [ "$arch" = "i686" ]; then |
d1458ac8 SH |
233 | arch=i386 |
234 | fi | |
235 | ||
ad3f14ab SM |
236 | if [ "$skip_arch_check" = "0" ]; then |
237 | case "$hostarch:$arch" in | |
238 | $arch:$arch) : ;; # the host == container | |
d4641754 SG |
239 | amd64:i386) :;; # supported "cross" |
240 | arm64:arm*) :;; # supported "cross" | |
241 | armel:armhf) :;; # supported "cross" | |
242 | armhf:armel) :;; # supported "cross" | |
ad3f14ab SM |
243 | *) echo "cannot create '$arch' container on hostarch '$hostarch'"; |
244 | exit 1;; | |
245 | esac | |
d1458ac8 SH |
246 | fi |
247 | ||
4b954f12 DJL |
248 | if [ "$stream" != "daily" -a "$stream" != "released" -a "$stream" != "tryreleased" ]; then |
249 | echo "Only 'daily' and 'released' and 'tryreleased' streams are supported" | |
427bffc7 SH |
250 | exit 1 |
251 | fi | |
252 | ||
d1458ac8 SH |
253 | if [ -z "$path" ]; then |
254 | echo "'path' parameter is required" | |
255 | exit 1 | |
256 | fi | |
257 | ||
258 | if [ "$(id -u)" != "0" ]; then | |
259 | echo "This script should be run as 'root'" | |
260 | exit 1 | |
261 | fi | |
262 | ||
1881820a SH |
263 | # detect rootfs |
264 | config="$path/config" | |
1897e3bc | 265 | if [ -z "$rootfs" ]; then |
7a96a068 CB |
266 | if grep -q '^lxc.rootfs.path' $config 2>/dev/null ; then |
267 | rootfs=$(awk -F= '/^lxc.rootfs.path =/{ print $2 }' $config) | |
1897e3bc SH |
268 | else |
269 | rootfs=$path/rootfs | |
270 | fi | |
1881820a | 271 | fi |
d1458ac8 SH |
272 | |
273 | type ubuntu-cloudimg-query | |
274 | type wget | |
275 | ||
276 | # determine the url, tarball, and directory names | |
277 | # download if needed | |
6dc6f80b KC |
278 | # Allow the cache base to be set by environment variable |
279 | cache=${LXC_CACHE_PATH:-"$STATE_DIR/cache/lxc"}/cloud-$release | |
9cde0368 | 280 | if [ $in_userns -eq 1 ]; then |
6dc6f80b KC |
281 | STATE_DIR="$HOME/.cache/lxc" |
282 | cache=${LXC_CACHE_PATH:-"$STATE_DIR"}/cloud-$release | |
9cde0368 | 283 | fi |
d1458ac8 SH |
284 | |
285 | mkdir -p $cache | |
286 | ||
4b954f12 DJL |
287 | if [ "$stream" = "tryreleased" ]; then |
288 | stream=released | |
289 | ubuntu-cloudimg-query $release $stream $arch 1>/dev/null 2>/dev/null || stream=daily | |
290 | fi | |
291 | ||
4759162d | 292 | if [ -n "$tarball" ]; then |
b942e672 | 293 | url2="$tarball" |
4759162d | 294 | else |
ad3f14ab SM |
295 | if ! url1=`ubuntu-cloudimg-query $release $stream $arch --format "%{url}\n"`; then |
296 | echo "There is no download available for release=$release, stream=$stream, arch=$arch" | |
297 | [ "$stream" = "daily" ] || echo "You may try with '--stream=daily'" | |
4a311045 | 298 | exit 1 |
ad3f14ab | 299 | fi |
5d58fc90 PHL |
300 | if [ "$release" = "precise" ] || [ "$release" = "trusty" ]; then |
301 | url2=`echo $url1 | sed -e 's/.tar.gz/-root\0/' -e 's/.tar.gz/.tar.xz/'` | |
302 | else | |
303 | url2=`echo $url1 | sed -e 's/.tar.gz/.squashfs/'` | |
304 | fi | |
4759162d SH |
305 | fi |
306 | ||
d1458ac8 SH |
307 | filename=`basename $url2` |
308 | ||
f1ccde27 SH |
309 | wgetcleanup() |
310 | { | |
b942e672 | 311 | rm -f $filename |
f1ccde27 SH |
312 | } |
313 | ||
1aad9e44 | 314 | do_extract_rootfs() { |
d1458ac8 SH |
315 | |
316 | cd $cache | |
317 | if [ $flushcache -eq 1 ]; then | |
318 | echo "Clearing the cached images" | |
319 | rm -f $filename | |
320 | fi | |
321 | ||
f1ccde27 | 322 | trap wgetcleanup EXIT SIGHUP SIGINT SIGTERM |
d1458ac8 | 323 | if [ ! -f $filename ]; then |
27c278a7 | 324 | wget $url2 |
d1458ac8 | 325 | fi |
f1ccde27 SH |
326 | trap EXIT |
327 | trap SIGHUP | |
328 | trap SIGINT | |
329 | trap SIGTERM | |
d1458ac8 | 330 | |
3eecde70 | 331 | echo "Extracting container rootfs" |
d1458ac8 SH |
332 | mkdir -p $rootfs |
333 | cd $rootfs | |
5d58fc90 PHL |
334 | if [ "${filename##*.}" = "squashfs" ]; then |
335 | unsquashfs -n -f -d "$rootfs" "$cache/$filename" | |
57d116ab | 336 | else |
5d58fc90 PHL |
337 | if [ $in_userns -eq 1 ]; then |
338 | tar --anchored --exclude="dev/*" --numeric-owner -xpf "$cache/$filename" | |
339 | mkdir -p $rootfs/dev/pts/ | |
340 | else | |
341 | tar --numeric-owner -xpf "$cache/$filename" | |
342 | fi | |
57d116ab | 343 | fi |
1aad9e44 SH |
344 | } |
345 | ||
346 | if [ -n "$tarball" ]; then | |
347 | do_extract_rootfs | |
348 | else | |
65d8ae9c | 349 | mkdir -p "$STATE_DIR/lock/subsys/" |
1aad9e44 | 350 | ( |
17abf278 | 351 | flock -x 9 |
1aad9e44 | 352 | do_extract_rootfs |
17abf278 | 353 | ) 9>"$STATE_DIR/lock/subsys/lxc-ubuntu-cloud" |
1aad9e44 | 354 | fi |
d1458ac8 | 355 | |
42ff5f0f | 356 | copy_configuration $path $rootfs $name $arch $release |
d1458ac8 | 357 | |
65d8ae9c SM |
358 | "$CLONE_HOOK_FN" "${cloneargs[@]}" "$rootfs" |
359 | ||
57d116ab | 360 | if [ $mapped_uid -ne -1 ]; then |
c01c25fc SG |
361 | chown $mapped_uid $path/config |
362 | chown -R $mapped_uid $STATE_DIR | |
363 | chown -R $mapped_uid $cache | |
57d116ab | 364 | fi |
2133f58c SH |
365 | if [ $mapped_gid -ne -1 ]; then |
366 | chgrp $mapped_gid $path/config | |
367 | chgrp -R $mapped_gid $STATE_DIR | |
368 | chgrp -R $mapped_gid $cache | |
369 | fi | |
57d116ab | 370 | |
d1458ac8 SH |
371 | echo "Container $name created." |
372 | exit 0 | |
b942e672 SM |
373 | |
374 | # vi: ts=4 expandtab |