1 | #!/bin/bash |
---|
2 | |
---|
3 | # |
---|
4 | # template script for generating ubuntu container for LXC |
---|
5 | # |
---|
6 | # This script consolidates and extends the existing lxc ubuntu scripts |
---|
7 | # |
---|
8 | |
---|
9 | # Copyright © 2011 Serge Hallyn <serge.hallyn@canonical.com> |
---|
10 | # Copyright © 2010 Wilhelm Meier |
---|
11 | # Author: Wilhelm Meier <wilhelm.meier@fh-kl.de> |
---|
12 | # |
---|
13 | # This program is free software; you can redistribute it and/or modify |
---|
14 | # it under the terms of the GNU General Public License version 2, as |
---|
15 | # published by the Free Software Foundation. |
---|
16 | |
---|
17 | # This program is distributed in the hope that it will be useful, |
---|
18 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
---|
19 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
---|
20 | # GNU General Public License for more details. |
---|
21 | |
---|
22 | # You should have received a copy of the GNU General Public License along |
---|
23 | # with this program; if not, write to the Free Software Foundation, Inc., |
---|
24 | # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
---|
25 | # |
---|
26 | |
---|
27 | set -e |
---|
28 | |
---|
29 | if [ -r /etc/default/lxc ]; then |
---|
30 | . /etc/default/lxc |
---|
31 | fi |
---|
32 | |
---|
33 | configure_ubuntu() |
---|
34 | { |
---|
35 | rootfs=$1 |
---|
36 | hostname=$2 |
---|
37 | release=$3 |
---|
38 | |
---|
39 | # configure the network using the dhcp |
---|
40 | cat <<EOF > $rootfs/etc/network/interfaces |
---|
41 | # This file describes the network interfaces available on your system |
---|
42 | # and how to activate them. For more information, see interfaces(5). |
---|
43 | |
---|
44 | # The loopback network interface |
---|
45 | auto lo |
---|
46 | iface lo inet loopback |
---|
47 | |
---|
48 | auto eth0 |
---|
49 | iface eth0 inet dhcp |
---|
50 | EOF |
---|
51 | |
---|
52 | # set the hostname |
---|
53 | cat <<EOF > $rootfs/etc/hostname |
---|
54 | $hostname |
---|
55 | EOF |
---|
56 | # set minimal hosts |
---|
57 | cat <<EOF > $rootfs/etc/hosts |
---|
58 | 127.0.0.1 localhost |
---|
59 | 127.0.1.1 $hostname |
---|
60 | |
---|
61 | # The following lines are desirable for IPv6 capable hosts |
---|
62 | ::1 ip6-localhost ip6-loopback |
---|
63 | fe00::0 ip6-localnet |
---|
64 | ff00::0 ip6-mcastprefix |
---|
65 | ff02::1 ip6-allnodes |
---|
66 | ff02::2 ip6-allrouters |
---|
67 | EOF |
---|
68 | |
---|
69 | if [ ! -f $rootfs/etc/init/container-detect.conf ]; then |
---|
70 | # suppress log level output for udev |
---|
71 | sed -i "s/=\"err\"/=0/" $rootfs/etc/udev/udev.conf |
---|
72 | |
---|
73 | # remove jobs for consoles 5 and 6 since we only create 4 consoles in |
---|
74 | # this template |
---|
75 | rm -f $rootfs/etc/init/tty{5,6}.conf |
---|
76 | fi |
---|
77 | |
---|
78 | if [ -z "$bindhome" ]; then |
---|
79 | chroot $rootfs useradd --create-home -s /bin/bash ubuntu |
---|
80 | echo "ubuntu:ubuntu" | chroot $rootfs chpasswd |
---|
81 | fi |
---|
82 | |
---|
83 | return 0 |
---|
84 | } |
---|
85 | |
---|
86 | # finish setting up the user in the container by injecting ssh key and |
---|
87 | # adding sudo group membership. |
---|
88 | # passed-in user is either 'ubuntu' or the user to bind in from host. |
---|
89 | finalize_user() |
---|
90 | { |
---|
91 | user=$1 |
---|
92 | |
---|
93 | sudo_version=$(chroot $rootfs dpkg-query -W -f='${Version}' sudo) |
---|
94 | |
---|
95 | if chroot $rootfs dpkg --compare-versions $sudo_version gt "1.8.3p1-1"; then |
---|
96 | groups="sudo" |
---|
97 | else |
---|
98 | groups="sudo admin" |
---|
99 | fi |
---|
100 | |
---|
101 | for group in $groups; do |
---|
102 | chroot $rootfs groupadd --system $group >/dev/null 2>&1 || true |
---|
103 | chroot $rootfs adduser ${user} $group >/dev/null 2>&1 || true |
---|
104 | done |
---|
105 | |
---|
106 | if [ -n "$auth_key" -a -f "$auth_key" ]; then |
---|
107 | u_path="/home/${user}/.ssh" |
---|
108 | root_u_path="$rootfs/$u_path" |
---|
109 | |
---|
110 | mkdir -p $root_u_path |
---|
111 | cp $auth_key "$root_u_path/authorized_keys" |
---|
112 | chroot $rootfs chown -R ${user}: "$u_path" |
---|
113 | |
---|
114 | echo "Inserted SSH public key from $auth_key into /home/${user}/.ssh/authorized_keys" |
---|
115 | fi |
---|
116 | return 0 |
---|
117 | } |
---|
118 | |
---|
119 | write_sourceslist() |
---|
120 | { |
---|
121 | # $1 => path to the rootfs |
---|
122 | # $2 => architecture we want to add |
---|
123 | # $3 => whether to use the multi-arch syntax or not |
---|
124 | |
---|
125 | case $2 in |
---|
126 | amd64|i386) |
---|
127 | MIRROR=${MIRROR:-http://archive.ubuntu.com/ubuntu} |
---|
128 | SECURITY_MIRROR=${SECURITY_MIRROR:-http://security.ubuntu.com/ubuntu} |
---|
129 | ;; |
---|
130 | *) |
---|
131 | MIRROR=${MIRROR:-http://ports.ubuntu.com/ubuntu-ports} |
---|
132 | SECURITY_MIRROR=${SECURITY_MIRROR:-http://ports.ubuntu.com/ubuntu-ports} |
---|
133 | ;; |
---|
134 | esac |
---|
135 | if [ -n "$3" ]; then |
---|
136 | cat >> "$1/etc/apt/sources.list" << EOF |
---|
137 | deb [arch=$2] $MIRROR ${release} main restricted universe multiverse |
---|
138 | deb [arch=$2] $MIRROR ${release}-updates main restricted universe multiverse |
---|
139 | deb [arch=$2] $SECURITY_MIRROR ${release}-security main restricted universe multiverse |
---|
140 | EOF |
---|
141 | else |
---|
142 | cat >> "$1/etc/apt/sources.list" << EOF |
---|
143 | deb $MIRROR ${release} main restricted universe multiverse |
---|
144 | deb $MIRROR ${release}-updates main restricted universe multiverse |
---|
145 | deb $SECURITY_MIRROR ${release}-security main restricted universe multiverse |
---|
146 | EOF |
---|
147 | fi |
---|
148 | } |
---|
149 | |
---|
150 | download_ubuntu() |
---|
151 | { |
---|
152 | cache=$1 |
---|
153 | arch=$2 |
---|
154 | release=$3 |
---|
155 | |
---|
156 | packages=vim,ssh |
---|
157 | echo "installing packages: $packages" |
---|
158 | |
---|
159 | # check the mini ubuntu was not already downloaded |
---|
160 | mkdir -p "$cache/partial-$arch" |
---|
161 | if [ $? -ne 0 ]; then |
---|
162 | echo "Failed to create '$cache/partial-$arch' directory" |
---|
163 | return 1 |
---|
164 | fi |
---|
165 | |
---|
166 | # download a mini ubuntu into a cache |
---|
167 | echo "Downloading ubuntu $release minimal ..." |
---|
168 | if [ -n "$(which qemu-debootstrap)" ]; then |
---|
169 | qemu-debootstrap --verbose --components=main,universe --arch=$arch --include=$packages $release $cache/partial-$arch $MIRROR |
---|
170 | else |
---|
171 | debootstrap --verbose --components=main,universe --arch=$arch --include=$packages $release $cache/partial-$arch $MIRROR |
---|
172 | fi |
---|
173 | |
---|
174 | if [ $? -ne 0 ]; then |
---|
175 | echo "Failed to download the rootfs, aborting." |
---|
176 | return 1 |
---|
177 | fi |
---|
178 | |
---|
179 | # Serge isn't sure whether we should avoid doing this when |
---|
180 | # $release == `distro-info -d` |
---|
181 | echo "Installing updates" |
---|
182 | > $cache/partial-$arch/etc/apt/sources.list |
---|
183 | write_sourceslist $cache/partial-$arch/ $arch |
---|
184 | |
---|
185 | chroot "$1/partial-${arch}" apt-get update |
---|
186 | if [ $? -ne 0 ]; then |
---|
187 | echo "Failed to update the apt cache" |
---|
188 | return 1 |
---|
189 | fi |
---|
190 | cat > "$1/partial-${arch}"/usr/sbin/policy-rc.d << EOF |
---|
191 | #!/bin/sh |
---|
192 | exit 101 |
---|
193 | EOF |
---|
194 | chmod +x "$1/partial-${arch}"/usr/sbin/policy-rc.d |
---|
195 | |
---|
196 | lxc-unshare -s MOUNT -- chroot "$1/partial-${arch}" apt-get dist-upgrade -y |
---|
197 | ret=$? |
---|
198 | rm -f "$1/partial-${arch}"/usr/sbin/policy-rc.d |
---|
199 | |
---|
200 | if [ $ret -ne 0 ]; then |
---|
201 | echo "Failed to upgrade the cache" |
---|
202 | return 1 |
---|
203 | fi |
---|
204 | |
---|
205 | mv "$1/partial-$arch" "$1/rootfs-$arch" |
---|
206 | echo "Download complete" |
---|
207 | return 0 |
---|
208 | } |
---|
209 | |
---|
210 | copy_ubuntu() |
---|
211 | { |
---|
212 | cache=$1 |
---|
213 | arch=$2 |
---|
214 | rootfs=$3 |
---|
215 | |
---|
216 | # make a local copy of the miniubuntu |
---|
217 | echo "Copying rootfs to $rootfs ..." |
---|
218 | mkdir -p $rootfs |
---|
219 | rsync -a $cache/rootfs-$arch/ $rootfs/ || return 1 |
---|
220 | return 0 |
---|
221 | } |
---|
222 | |
---|
223 | install_ubuntu() |
---|
224 | { |
---|
225 | rootfs=$1 |
---|
226 | release=$2 |
---|
227 | flushcache=$3 |
---|
228 | cache="/var/cache/lxc/$release" |
---|
229 | mkdir -p /var/lock/subsys/ |
---|
230 | |
---|
231 | ( |
---|
232 | flock -x 200 |
---|
233 | if [ $? -ne 0 ]; then |
---|
234 | echo "Cache repository is busy." |
---|
235 | return 1 |
---|
236 | fi |
---|
237 | |
---|
238 | |
---|
239 | if [ $flushcache -eq 1 ]; then |
---|
240 | echo "Flushing cache..." |
---|
241 | rm -rf "$cache/partial-$arch" |
---|
242 | rm -rf "$cache/rootfs-$arch" |
---|
243 | fi |
---|
244 | |
---|
245 | echo "Checking cache download in $cache/rootfs-$arch ... " |
---|
246 | if [ ! -e "$cache/rootfs-$arch" ]; then |
---|
247 | download_ubuntu $cache $arch $release |
---|
248 | if [ $? -ne 0 ]; then |
---|
249 | echo "Failed to download 'ubuntu $release base'" |
---|
250 | return 1 |
---|
251 | fi |
---|
252 | fi |
---|
253 | |
---|
254 | echo "Copy $cache/rootfs-$arch to $rootfs ... " |
---|
255 | copy_ubuntu $cache $arch $rootfs |
---|
256 | if [ $? -ne 0 ]; then |
---|
257 | echo "Failed to copy rootfs" |
---|
258 | return 1 |
---|
259 | fi |
---|
260 | |
---|
261 | return 0 |
---|
262 | |
---|
263 | ) 200>/var/lock/subsys/lxc |
---|
264 | |
---|
265 | return $? |
---|
266 | } |
---|
267 | |
---|
268 | copy_configuration() |
---|
269 | { |
---|
270 | path=$1 |
---|
271 | rootfs=$2 |
---|
272 | name=$3 |
---|
273 | arch=$4 |
---|
274 | release=$5 |
---|
275 | |
---|
276 | if [ $arch = "i386" ]; then |
---|
277 | arch="i686" |
---|
278 | fi |
---|
279 | |
---|
280 | ttydir="" |
---|
281 | if [ -f $rootfs/etc/init/container-detect.conf ]; then |
---|
282 | ttydir=" lxc" |
---|
283 | fi |
---|
284 | |
---|
285 | # if there is exactly one veth network entry, make sure it has an |
---|
286 | # associated hwaddr. |
---|
287 | nics=`grep -e '^lxc\.network\.type[ \t]*=[ \t]*veth' $path/config | wc -l` |
---|
288 | if [ $nics -eq 1 ]; then |
---|
289 | grep -q "^lxc.network.hwaddr" $path/config || cat <<EOF >> $path/config |
---|
290 | lxc.network.hwaddr = 00:16:3e:$(openssl rand -hex 3| sed 's/\(..\)/\1:/g; s/.$//') |
---|
291 | EOF |
---|
292 | fi |
---|
293 | |
---|
294 | cat <<EOF >> $path/config |
---|
295 | lxc.utsname = $name |
---|
296 | |
---|
297 | lxc.devttydir =$ttydir |
---|
298 | lxc.tty = 4 |
---|
299 | lxc.pts = 1024 |
---|
300 | lxc.rootfs = $rootfs |
---|
301 | lxc.mount = $path/fstab |
---|
302 | lxc.arch = $arch |
---|
303 | lxc.cap.drop = sys_module mac_admin |
---|
304 | lxc.pivotdir = lxc_putold |
---|
305 | |
---|
306 | # uncomment the next line to run the container unconfined: |
---|
307 | #lxc.aa_profile = unconfined |
---|
308 | |
---|
309 | lxc.cgroup.devices.deny = a |
---|
310 | # Allow any mknod (but not using the node) |
---|
311 | lxc.cgroup.devices.allow = c *:* m |
---|
312 | lxc.cgroup.devices.allow = b *:* m |
---|
313 | # /dev/null and zero |
---|
314 | lxc.cgroup.devices.allow = c 1:3 rwm |
---|
315 | lxc.cgroup.devices.allow = c 1:5 rwm |
---|
316 | # consoles |
---|
317 | lxc.cgroup.devices.allow = c 5:1 rwm |
---|
318 | lxc.cgroup.devices.allow = c 5:0 rwm |
---|
319 | #lxc.cgroup.devices.allow = c 4:0 rwm |
---|
320 | #lxc.cgroup.devices.allow = c 4:1 rwm |
---|
321 | # /dev/{,u}random |
---|
322 | lxc.cgroup.devices.allow = c 1:9 rwm |
---|
323 | lxc.cgroup.devices.allow = c 1:8 rwm |
---|
324 | lxc.cgroup.devices.allow = c 136:* rwm |
---|
325 | lxc.cgroup.devices.allow = c 5:2 rwm |
---|
326 | # rtc |
---|
327 | lxc.cgroup.devices.allow = c 254:0 rwm |
---|
328 | #fuse |
---|
329 | lxc.cgroup.devices.allow = c 10:229 rwm |
---|
330 | #tun |
---|
331 | lxc.cgroup.devices.allow = c 10:200 rwm |
---|
332 | #full |
---|
333 | lxc.cgroup.devices.allow = c 1:7 rwm |
---|
334 | #hpet |
---|
335 | lxc.cgroup.devices.allow = c 10:228 rwm |
---|
336 | #kvm |
---|
337 | lxc.cgroup.devices.allow = c 10:232 rwm |
---|
338 | EOF |
---|
339 | |
---|
340 | cat <<EOF > $path/fstab |
---|
341 | proc proc proc nodev,noexec,nosuid 0 0 |
---|
342 | sysfs sys sysfs defaults 0 0 |
---|
343 | EOF |
---|
344 | |
---|
345 | if [ $? -ne 0 ]; then |
---|
346 | echo "Failed to add configuration" |
---|
347 | return 1 |
---|
348 | fi |
---|
349 | |
---|
350 | return 0 |
---|
351 | } |
---|
352 | |
---|
353 | trim() |
---|
354 | { |
---|
355 | rootfs=$1 |
---|
356 | release=$2 |
---|
357 | |
---|
358 | # provide the lxc service |
---|
359 | cat <<EOF > $rootfs/etc/init/lxc.conf |
---|
360 | # fake some events needed for correct startup other services |
---|
361 | |
---|
362 | description "Container Upstart" |
---|
363 | |
---|
364 | start on startup |
---|
365 | |
---|
366 | script |
---|
367 | rm -rf /var/run/*.pid |
---|
368 | rm -rf /var/run/network/* |
---|
369 | /sbin/initctl emit stopped JOB=udevtrigger --no-wait |
---|
370 | /sbin/initctl emit started JOB=udev --no-wait |
---|
371 | end script |
---|
372 | EOF |
---|
373 | |
---|
374 | # fix buggus runlevel with sshd |
---|
375 | cat <<EOF > $rootfs/etc/init/ssh.conf |
---|
376 | # ssh - OpenBSD Secure Shell server |
---|
377 | # |
---|
378 | # The OpenSSH server provides secure shell access to the system. |
---|
379 | |
---|
380 | description "OpenSSH server" |
---|
381 | |
---|
382 | start on filesystem |
---|
383 | stop on runlevel [!2345] |
---|
384 | |
---|
385 | expect fork |
---|
386 | respawn |
---|
387 | respawn limit 10 5 |
---|
388 | umask 022 |
---|
389 | # replaces SSHD_OOM_ADJUST in /etc/default/ssh |
---|
390 | oom never |
---|
391 | |
---|
392 | pre-start script |
---|
393 | test -x /usr/sbin/sshd || { stop; exit 0; } |
---|
394 | test -e /etc/ssh/sshd_not_to_be_run && { stop; exit 0; } |
---|
395 | test -c /dev/null || { stop; exit 0; } |
---|
396 | |
---|
397 | mkdir -p -m0755 /var/run/sshd |
---|
398 | end script |
---|
399 | |
---|
400 | # if you used to set SSHD_OPTS in /etc/default/ssh, you can change the |
---|
401 | # 'exec' line here instead |
---|
402 | exec /usr/sbin/sshd |
---|
403 | EOF |
---|
404 | |
---|
405 | cat <<EOF > $rootfs/etc/init/console.conf |
---|
406 | # console - getty |
---|
407 | # |
---|
408 | # This service maintains a console on tty1 from the point the system is |
---|
409 | # started until it is shut down again. |
---|
410 | |
---|
411 | start on stopped rc RUNLEVEL=[2345] |
---|
412 | stop on runlevel [!2345] |
---|
413 | |
---|
414 | respawn |
---|
415 | exec /sbin/getty -8 38400 /dev/console |
---|
416 | EOF |
---|
417 | |
---|
418 | cat <<EOF > $rootfs/lib/init/fstab |
---|
419 | # /lib/init/fstab: cleared out for bare-bones lxc |
---|
420 | EOF |
---|
421 | |
---|
422 | # reconfigure some services |
---|
423 | if [ -z "$LANG" ]; then |
---|
424 | chroot $rootfs locale-gen en_US.UTF-8 |
---|
425 | chroot $rootfs update-locale LANG=en_US.UTF-8 |
---|
426 | else |
---|
427 | chroot $rootfs locale-gen $LANG |
---|
428 | chroot $rootfs update-locale LANG=$LANG |
---|
429 | fi |
---|
430 | |
---|
431 | # remove pointless services in a container |
---|
432 | chroot $rootfs /usr/sbin/update-rc.d -f ondemand remove |
---|
433 | |
---|
434 | chroot $rootfs /bin/bash -c 'cd /etc/init; for f in $(ls u*.conf); do mv $f $f.orig; done' |
---|
435 | chroot $rootfs /bin/bash -c 'cd /etc/init; for f in $(ls tty[2-9].conf); do mv $f $f.orig; done' |
---|
436 | chroot $rootfs /bin/bash -c 'cd /etc/init; for f in $(ls plymouth*.conf); do mv $f $f.orig; done' |
---|
437 | chroot $rootfs /bin/bash -c 'cd /etc/init; for f in $(ls hwclock*.conf); do mv $f $f.orig; done' |
---|
438 | chroot $rootfs /bin/bash -c 'cd /etc/init; for f in $(ls module*.conf); do mv $f $f.orig; done' |
---|
439 | |
---|
440 | # if this isn't lucid, then we need to twiddle the network upstart bits :( |
---|
441 | if [ $release != "lucid" ]; then |
---|
442 | sed -i 's/^.*emission handled.*$/echo Emitting lo/' $rootfs/etc/network/if-up.d/upstart |
---|
443 | fi |
---|
444 | } |
---|
445 | |
---|
446 | post_process() |
---|
447 | { |
---|
448 | rootfs=$1 |
---|
449 | release=$2 |
---|
450 | trim_container=$3 |
---|
451 | |
---|
452 | if [ $trim_container -eq 1 ]; then |
---|
453 | trim $rootfs $release |
---|
454 | elif [ ! -f $rootfs/etc/init/container-detect.conf ]; then |
---|
455 | # Make sure we have a working resolv.conf |
---|
456 | cresolvonf="${rootfs}/etc/resolv.conf" |
---|
457 | mv $cresolvonf ${cresolvonf}.lxcbak |
---|
458 | cat /etc/resolv.conf > ${cresolvonf} |
---|
459 | |
---|
460 | # for lucid, if not trimming, then add the ubuntu-virt |
---|
461 | # ppa and install lxcguest |
---|
462 | if [ $release = "lucid" ]; then |
---|
463 | chroot $rootfs apt-get install --force-yes -y python-software-properties |
---|
464 | chroot $rootfs add-apt-repository ppa:ubuntu-virt/ppa |
---|
465 | fi |
---|
466 | |
---|
467 | chroot $rootfs apt-get update |
---|
468 | chroot $rootfs apt-get install --force-yes -y lxcguest |
---|
469 | |
---|
470 | # Restore old resolv.conf |
---|
471 | rm -f ${cresolvonf} |
---|
472 | mv ${cresolvonf}.lxcbak ${cresolvonf} |
---|
473 | fi |
---|
474 | |
---|
475 | # If the container isn't running a native architecture, setup multiarch |
---|
476 | if [ -x "$(ls -1 ${rootfs}/usr/bin/qemu-*-static 2>/dev/null)" ]; then |
---|
477 | dpkg_version=$(chroot $rootfs dpkg-query -W -f='${Version}' dpkg) |
---|
478 | if chroot $rootfs dpkg --compare-versions $dpkg_version ge "1.16.2"; then |
---|
479 | chroot $rootfs dpkg --add-architecture ${hostarch} |
---|
480 | else |
---|
481 | mkdir -p ${rootfs}/etc/dpkg/dpkg.cfg.d |
---|
482 | echo "foreign-architecture ${hostarch}" > ${rootfs}/etc/dpkg/dpkg.cfg.d/lxc-multiarch |
---|
483 | fi |
---|
484 | |
---|
485 | # Save existing value of MIRROR and SECURITY_MIRROR |
---|
486 | DEFAULT_MIRROR=$MIRROR |
---|
487 | DEFAULT_SECURITY_MIRROR=$SECURITY_MIRROR |
---|
488 | |
---|
489 | # Write a new sources.list containing both native and multiarch entries |
---|
490 | > ${rootfs}/etc/apt/sources.list |
---|
491 | write_sourceslist $rootfs $arch "native" |
---|
492 | |
---|
493 | MIRROR=$DEFAULT_MIRROR |
---|
494 | SECURITY_MIRROR=$DEFAULT_SECURITY_MIRROR |
---|
495 | write_sourceslist $rootfs $hostarch "multiarch" |
---|
496 | |
---|
497 | # Finally update the lists and install upstart using the host architecture |
---|
498 | chroot $rootfs apt-get update |
---|
499 | chroot $rootfs apt-get install --force-yes -y --no-install-recommends upstart:${hostarch} mountall:${hostarch} iproute:${hostarch} isc-dhcp-client:${hostarch} |
---|
500 | fi |
---|
501 | |
---|
502 | # rmdir /dev/shm for containers that have /run/shm |
---|
503 | # I'm afraid of doing rm -rf $rootfs/dev/shm, in case it did |
---|
504 | # get bind mounted to the host's /run/shm. So try to rmdir |
---|
505 | # it, and in case that fails move it out of the way. |
---|
506 | if [ ! -L $rootfs/dev/shm ] && [ -d $rootfs/run/shm ] && [ -e $rootfs/dev/shm ]; then |
---|
507 | mv $rootfs/dev/shm $rootfs/dev/shm.bak |
---|
508 | ln -s /run/shm $rootfs/dev/shm |
---|
509 | fi |
---|
510 | } |
---|
511 | |
---|
512 | do_bindhome() |
---|
513 | { |
---|
514 | rootfs=$1 |
---|
515 | user=$2 |
---|
516 | |
---|
517 | # copy /etc/passwd, /etc/shadow, and /etc/group entries into container |
---|
518 | pwd=`getent passwd $user` || { echo "Failed to copy password entry for $user"; false; } |
---|
519 | echo $pwd >> $rootfs/etc/passwd |
---|
520 | |
---|
521 | # make sure user's shell exists in the container |
---|
522 | shell=`echo $pwd | cut -d: -f 7` |
---|
523 | if [ ! -x $rootfs/$shell ]; then |
---|
524 | echo "shell $shell for user $user was not found in the container." |
---|
525 | pkg=`dpkg -S $(readlink -m $shell) | cut -d ':' -f1` |
---|
526 | echo "Installing $pkg" |
---|
527 | chroot $rootfs apt-get --force-yes -y install $pkg |
---|
528 | fi |
---|
529 | |
---|
530 | shad=`getent shadow $user` |
---|
531 | echo "$shad" >> $rootfs/etc/shadow |
---|
532 | |
---|
533 | # bind-mount the user's path into the container's /home |
---|
534 | h=`getent passwd $user | cut -d: -f 6` |
---|
535 | mkdir -p $rootfs/$h |
---|
536 | |
---|
537 | # use relative path in container |
---|
538 | h2=${h#/} |
---|
539 | while [ ${h2:0:1} = "/" ]; do |
---|
540 | h2=${h2#/} |
---|
541 | done |
---|
542 | echo "$h $h2 none bind 0 0" >> $path/fstab |
---|
543 | |
---|
544 | # Make sure the group exists in container |
---|
545 | grp=`echo $pwd | cut -d: -f 4` # group number for $user |
---|
546 | grpe=`getent group $grp` || return 0 # if host doesn't define grp, ignore in container |
---|
547 | chroot $rootfs getent group "$grpe" || echo "$grpe" >> $rootfs/etc/group |
---|
548 | } |
---|
549 | |
---|
550 | usage() |
---|
551 | { |
---|
552 | cat <<EOF |
---|
553 | $1 -h|--help [-a|--arch] [-b|--bindhome <user>] [--trim] [-d|--debug] |
---|
554 | [-F | --flush-cache] [-r|--release <release>] [ -S | --auth-key <keyfile>] |
---|
555 | release: the ubuntu release (e.g. precise): defaults to host release on ubuntu, otherwise uses latest LTS |
---|
556 | trim: make a minimal (faster, but not upgrade-safe) container |
---|
557 | bindhome: bind <user>'s home into the container |
---|
558 | The ubuntu user will not be created, and <user> will have |
---|
559 | sudo access. |
---|
560 | arch: the container architecture (e.g. amd64): defaults to host arch |
---|
561 | auth-key: SSH Public key file to inject into container |
---|
562 | EOF |
---|
563 | return 0 |
---|
564 | } |
---|
565 | |
---|
566 | options=$(getopt -o a:b:hp:r:xn:FS:d -l arch:,bindhome:,help,path:,release:,trim,name:,flush-cache,auth-key:,debug -- "$@") |
---|
567 | if [ $? -ne 0 ]; then |
---|
568 | usage $(basename $0) |
---|
569 | exit 1 |
---|
570 | fi |
---|
571 | eval set -- "$options" |
---|
572 | |
---|
573 | release=precise # Default to the last Ubuntu LTS release for non-Ubuntu systems |
---|
574 | if [ -f /etc/lsb-release ]; then |
---|
575 | . /etc/lsb-release |
---|
576 | if [ "$DISTRIB_ID" = "Ubuntu" ]; then |
---|
577 | release=$DISTRIB_CODENAME |
---|
578 | fi |
---|
579 | fi |
---|
580 | |
---|
581 | bindhome= |
---|
582 | arch=$(arch) |
---|
583 | |
---|
584 | # Code taken from debootstrap |
---|
585 | if [ -x /usr/bin/dpkg ] && /usr/bin/dpkg --print-architecture >/dev/null 2>&1; then |
---|
586 | arch=`/usr/bin/dpkg --print-architecture` |
---|
587 | elif type udpkg >/dev/null 2>&1 && udpkg --print-architecture >/dev/null 2>&1; then |
---|
588 | arch=`/usr/bin/udpkg --print-architecture` |
---|
589 | else |
---|
590 | arch=$(arch) |
---|
591 | if [ "$arch" = "i686" ]; then |
---|
592 | arch="i386" |
---|
593 | elif [ "$arch" = "x86_64" ]; then |
---|
594 | arch="amd64" |
---|
595 | elif [ "$arch" = "armv7l" ]; then |
---|
596 | arch="armel" |
---|
597 | fi |
---|
598 | fi |
---|
599 | |
---|
600 | debug=0 |
---|
601 | trim_container=0 |
---|
602 | hostarch=$arch |
---|
603 | flushcache=0 |
---|
604 | while true |
---|
605 | do |
---|
606 | case "$1" in |
---|
607 | -h|--help) usage $0 && exit 0;; |
---|
608 | -p|--path) path=$2; shift 2;; |
---|
609 | -n|--name) name=$2; shift 2;; |
---|
610 | -F|--flush-cache) flushcache=1; shift 1;; |
---|
611 | -r|--release) release=$2; shift 2;; |
---|
612 | -b|--bindhome) bindhome=$2; shift 2;; |
---|
613 | -a|--arch) arch=$2; shift 2;; |
---|
614 | -x|--trim) trim_container=1; shift 1;; |
---|
615 | -S|--auth-key) auth_key=$2; shift 2;; |
---|
616 | -d|--debug) debug=1; shift 1;; |
---|
617 | --) shift 1; break ;; |
---|
618 | *) break ;; |
---|
619 | esac |
---|
620 | done |
---|
621 | |
---|
622 | if [ $debug -eq 1 ]; then |
---|
623 | set -x |
---|
624 | fi |
---|
625 | |
---|
626 | if [ -n "$bindhome" ]; then |
---|
627 | pwd=`getent passwd $bindhome` |
---|
628 | if [ $? -ne 0 ]; then |
---|
629 | echo "Error: no password entry found for $bindhome" |
---|
630 | exit 1 |
---|
631 | fi |
---|
632 | fi |
---|
633 | |
---|
634 | |
---|
635 | if [ "$arch" == "i686" ]; then |
---|
636 | arch=i386 |
---|
637 | fi |
---|
638 | |
---|
639 | if [ $hostarch = "i386" -a $arch = "amd64" ]; then |
---|
640 | echo "can't create amd64 container on i386" |
---|
641 | exit 1 |
---|
642 | fi |
---|
643 | |
---|
644 | type debootstrap |
---|
645 | if [ $? -ne 0 ]; then |
---|
646 | echo "'debootstrap' command is missing" |
---|
647 | exit 1 |
---|
648 | fi |
---|
649 | |
---|
650 | if [ -z "$path" ]; then |
---|
651 | echo "'path' parameter is required" |
---|
652 | exit 1 |
---|
653 | fi |
---|
654 | |
---|
655 | if [ "$(id -u)" != "0" ]; then |
---|
656 | echo "This script should be run as 'root'" |
---|
657 | exit 1 |
---|
658 | fi |
---|
659 | |
---|
660 | rootfs=$path/rootfs |
---|
661 | |
---|
662 | install_ubuntu $rootfs $release $flushcache |
---|
663 | if [ $? -ne 0 ]; then |
---|
664 | echo "failed to install ubuntu $release" |
---|
665 | exit 1 |
---|
666 | fi |
---|
667 | |
---|
668 | configure_ubuntu $rootfs $name $release |
---|
669 | if [ $? -ne 0 ]; then |
---|
670 | echo "failed to configure ubuntu $release for a container" |
---|
671 | exit 1 |
---|
672 | fi |
---|
673 | |
---|
674 | copy_configuration $path $rootfs $name $arch $release |
---|
675 | if [ $? -ne 0 ]; then |
---|
676 | echo "failed write configuration file" |
---|
677 | exit 1 |
---|
678 | fi |
---|
679 | |
---|
680 | post_process $rootfs $release $trim_container |
---|
681 | |
---|
682 | if [ -n "$bindhome" ]; then |
---|
683 | do_bindhome $rootfs $bindhome |
---|
684 | finalize_user $bindhome |
---|
685 | else |
---|
686 | finalize_user ubuntu |
---|
687 | fi |
---|
688 | |
---|
689 | echo "" |
---|
690 | echo "##" |
---|
691 | echo "# The default user is 'ubuntu' with password 'ubuntu'!" |
---|
692 | echo "# Use the 'sudo' command to run tasks as root in the container." |
---|
693 | echo "##" |
---|
694 | echo "" |
---|