/
lxc-devuan
505 lines (421 loc) · 13.8 KB
/
lxc-devuan
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
#!/bin/bash
#
# lxc: linux Container library
# Authors:
# Daniel Lezcano <daniel.lezcano@free.fr>
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
# This library 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
# Lesser General Public License for more details.
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
# Detect use under userns (unsupported)
for arg in "$@"; do
[ "$arg" = "--" ] && break
if [ "$arg" = "--mapped-uid" -o "$arg" = "--mapped-gid" ]; then
echo "This template can't be used for unprivileged containers." 1>&2
echo "You may want to try the \"download\" template instead." 1>&2
exit 1
fi
done
# Make sure the usual locations are in PATH
export PATH=$PATH:/usr/sbin:/usr/bin:/sbin:/bin
MIRROR=${MIRROR:-http://pkgmaster.devuan.org/merged}
LOCALSTATEDIR="/var"
LXC_TEMPLATE_CONFIG="/usr/share/lxc/config"
configure_debian()
{
rootfs=$1
hostname=$2
# squeeze only has /dev/tty and /dev/tty0 by default,
# therefore creating missing device nodes for tty1-4.
for tty in $(seq 1 4); do
if [ ! -e $rootfs/dev/tty$tty ]; then
mknod $rootfs/dev/tty$tty c 4 $tty
fi
done
# configure the inittab
cat <<EOF > $rootfs/etc/inittab
id:3:initdefault:
si::sysinit:/etc/init.d/rcS
l0:0:wait:/etc/init.d/rc 0
l1:1:wait:/etc/init.d/rc 1
l2:2:wait:/etc/init.d/rc 2
l3:3:wait:/etc/init.d/rc 3
l4:4:wait:/etc/init.d/rc 4
l5:5:wait:/etc/init.d/rc 5
l6:6:wait:/etc/init.d/rc 6
# Normally not reached, but fallthrough in case of emergency.
z6:6:respawn:/sbin/sulogin
1:2345:respawn:/sbin/getty 38400 console
c1:12345:respawn:/sbin/getty 38400 tty1 linux
c2:12345:respawn:/sbin/getty 38400 tty2 linux
c3:12345:respawn:/sbin/getty 38400 tty3 linux
c4:12345:respawn:/sbin/getty 38400 tty4 linux
p6::ctrlaltdel:/sbin/init 6
p0::powerfail:/sbin/init 0
EOF
# symlink mtab
[ -e "$rootfs/etc/mtab" ] && rm $rootfs/etc/mtab
ln -s /proc/self/mounts $rootfs/etc/mtab
# disable selinux in debian
mkdir -p $rootfs/selinux
echo 0 > $rootfs/selinux/enforce
# configure the network using the dhcp
cat <<EOF > $rootfs/etc/network/interfaces
auto lo
iface lo inet loopback
auto eth0
iface eth0 inet dhcp
EOF
# set the hostname
cat <<EOF > $rootfs/etc/hostname
$hostname
EOF
# reconfigure some services
if [ -z "$LANG" ]; then
chroot $rootfs locale-gen en_US.UTF-8 UTF-8
chroot $rootfs update-locale LANG=en_US.UTF-8
else
encoding=$(echo $LANG | cut -d. -f2)
chroot $rootfs sed -e "s/^# \(${LANG} ${encoding}\)/\1/" \
-i /etc/locale.gen 2> /dev/null
chroot $rootfs locale-gen $LANG $encoding
chroot $rootfs update-locale LANG=$LANG
fi
# remove pointless services in a container
chroot $rootfs /usr/sbin/update-rc.d -f checkroot.sh disable
chroot $rootfs /usr/sbin/update-rc.d -f umountfs disable
chroot $rootfs /usr/sbin/update-rc.d -f hwclock.sh disable
chroot $rootfs /usr/sbin/update-rc.d -f hwclockfirst.sh disable
# generate new SSH keys
if [ -x $rootfs/var/lib/dpkg/info/openssh-server.postinst ]; then
cat > $rootfs/usr/sbin/policy-rc.d << EOF
#!/bin/sh
exit 101
EOF
chmod +x $rootfs/usr/sbin/policy-rc.d
if [ -f $rootfs/etc/init/ssh.conf ]; then
mv $rootfs/etc/init/ssh.conf $rootfs/etc/init/ssh.conf.disabled
fi
rm -f $rootfs/etc/ssh/ssh_host_*key*
DPKG_MAINTSCRIPT_PACKAGE=openssh DPKG_MAINTSCRIPT_NAME=postinst chroot $rootfs /var/lib/dpkg/info/openssh-server.postinst configure
sed -i "s/root@$(hostname)/root@$hostname/g" $rootfs/etc/ssh/ssh_host_*.pub
# Don't allow root login with password
sed -i "s/PermitRootLogin yes/PermitRootLogin without-password/" $rootfs/etc/ssh/sshd_config
if [ -f "$rootfs/etc/init/ssh.conf.disabled" ]; then
mv $rootfs/etc/init/ssh.conf.disabled $rootfs/etc/init/ssh.conf
fi
rm -f $rootfs/usr/sbin/policy-rc.d
fi
# set initial timezone as on host
if [ -f /etc/timezone ]; then
cat /etc/timezone > $rootfs/etc/timezone
chroot $rootfs dpkg-reconfigure -f noninteractive tzdata
elif [ -f /etc/sysconfig/clock ]; then
. /etc/sysconfig/clock
echo $ZONE > $rootfs/etc/timezone
chroot $rootfs dpkg-reconfigure -f noninteractive tzdata
else
echo "Timezone in container is not configured. Adjust it manually."
fi
password="$(dd if=/dev/urandom bs=6 count=1 2> /dev/null | base64)"
echo "root:$password" | chroot $rootfs chpasswd
echo "Root password is '$password', please change !"
return 0
}
configure_debian_systemd()
{
path=$1
rootfs=$2
init="$(chroot ${rootfs} dpkg-query --search /sbin/init | cut -d : -f 1)"
if [ "$init" = "systemd-sysv" ]; then
# only appropiate when systemd is PID 1
echo 'lxc.autodev = 1' >> "$path/config"
echo 'lxc.kmsg = 0' >> "$path/config"
fi
# this only works if we have getty@.service to manipulate
if [ -f ${rootfs}/lib/systemd/system/getty\@.service ]; then
sed -e 's/^ConditionPathExists=/# ConditionPathExists=/' \
-e 's/After=dev-%i.device/After=/' \
< ${rootfs}/lib/systemd/system/getty\@.service \
> ${rootfs}/etc/systemd/system/getty\@.service
fi
# just in case systemd is not installed
# mkdir -p ${rootfs}/{lib,etc}/systemd/system
# mkdir -p ${rootfs}/etc/systemd/system/getty.target.wants
# This function has been copied and adapted from lxc-fedora
rm -f ${rootfs}/etc/systemd/system/default.target
touch ${rootfs}/etc/fstab
# chroot ${rootfs} ln -s /dev/null /etc/systemd/system/systemd-udevd.service
# chroot ${rootfs} ln -s /lib/systemd/system/multi-user.target /etc/systemd/system/default.target
# Make systemd honor SIGPWR
# chroot ${rootfs} ln -s /lib/systemd/system/halt.target /etc/systemd/system/sigpwr.target
# Setup getty service on the 4 ttys we are going to allow in the
# default config. Number should match lxc.tty
# ( cd ${rootfs}/etc/systemd/system/getty.target.wants
# for i in 1 2 3 4 ; do ln -sf ../getty\@.service getty@tty${i}.service; done )
return 0
}
cleanup()
{
rm -rf $cache/partial-$release-$arch
rm -rf $cache/rootfs-$release-$arch
}
download_debian()
{
packages=\
ifupdown,\
locales,\
dialog,\
isc-dhcp-client,\
netbase,\
net-tools,\
iproute,\
openssh-server
cache=$1
arch=$2
release=$3
trap cleanup EXIT SIGHUP SIGINT SIGTERM
# check the mini debian was not already downloaded
mkdir -p "$cache/partial-$release-$arch"
if [ $? -ne 0 ]; then
echo "Failed to create '$cache/partial-$release-$arch' directory"
return 1
fi
# download a mini debian into a cache
echo "Downloading debian minimal ..."
debootstrap --verbose --variant=minbase --arch=$arch \
--include=$packages \
"$release" "$cache/partial-$release-$arch" $MIRROR
if [ $? -ne 0 ]; then
echo "Failed to download the rootfs, aborting."
return 1
fi
mv "$1/partial-$release-$arch" "$1/rootfs-$release-$arch"
echo "Download complete."
trap EXIT
trap SIGINT
trap SIGTERM
trap SIGHUP
return 0
}
copy_debian()
{
cache=$1
arch=$2
rootfs=$3
release=$4
# make a local copy of the minidebian
echo -n "Copying rootfs to $rootfs..."
mkdir -p $rootfs
rsync -Ha "$cache/rootfs-$release-$arch"/ $rootfs/ || return 1
return 0
}
install_debian()
{
cache="$LOCALSTATEDIR/cache/lxc/devuan"
rootfs=$1
release=$2
arch=$3
mkdir -p $LOCALSTATEDIR/lock/subsys/
(
flock -x 9
if [ $? -ne 0 ]; then
echo "Cache repository is busy."
return 1
fi
echo "Checking cache download in $cache/rootfs-$release-$arch ... "
if [ ! -e "$cache/rootfs-$release-$arch" ]; then
download_debian $cache $arch $release
if [ $? -ne 0 ]; then
echo "Failed to download 'devuan base'"
return 1
fi
fi
copy_debian $cache $arch $rootfs $release
if [ $? -ne 0 ]; then
echo "Failed to copy rootfs"
return 1
fi
return 0
) 9>$LOCALSTATEDIR/lock/subsys/lxc-devuan
return $?
}
copy_configuration()
{
path=$1
rootfs=$2
hostname=$3
arch=$4
# Generate the configuration file
## Create the fstab (empty by default)
touch $path/fstab
# 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" $path/config || sed -i -e "/^lxc\.network\.type[ \t]*=[ \t]*veth/a lxc.network.hwaddr = 00:16:3e:$(openssl rand -hex 3| sed 's/\(..\)/\1:/g; s/.$//')" $path/config
fi
## Add all the includes
echo "" >> $path/config
echo "# Common configuration" >> $path/config
if [ -e "${LXC_TEMPLATE_CONFIG}/devuan.common.conf" ]; then
echo "lxc.include = ${LXC_TEMPLATE_CONFIG}/devuan.common.conf" >> $path/config
fi
if [ -e "${LXC_TEMPLATE_CONFIG}/devuan.${release}.conf" ]; then
echo "lxc.include = ${LXC_TEMPLATE_CONFIG}/devuan.${release}.conf" >> $path/config
fi
## Add the container-specific config
echo "" >> $path/config
echo "# Container specific configuration" >> $path/config
grep -q "^lxc.rootfs" $path/config 2> /dev/null || echo "lxc.rootfs = $rootfs" >> $path/config
cat <<EOF >> $path/config
lxc.mount = $path/fstab
lxc.utsname = $hostname
lxc.arch = $arch
EOF
if [ $? -ne 0 ]; then
echo "Failed to add configuration"
return 1
fi
return 0
}
clean()
{
cache="$LOCALSTATEDIR/cache/lxc/devuan"
if [ ! -e $cache ]; then
exit 0
fi
# lock, so we won't purge while someone is creating a repository
(
flock -x 9
if [ $? != 0 ]; then
echo "Cache repository is busy."
exit 1
fi
echo -n "Purging the download cache..."
rm --preserve-root --one-file-system -rf $cache && echo "Done." || exit 1
exit 0
) 9>$LOCALSTATEDIR/lock/subsys/lxc-devuan
}
usage()
{
cat <<EOF
$1 -h|--help -p|--path=<path> [-a|--arch] [-r|--release=<release>] [-c|--clean]
release: the devuan release (e.g. jessie): defaults to current stable
arch: the container architecture (e.g. amd64): defaults to host arch
EOF
return 0
}
options=$(getopt -o hp:n:a:r:c -l help,rootfs:,path:,name:,arch:,release:,clean -- "$@")
if [ $? -ne 0 ]; then
usage $(basename $0)
exit 1
fi
eval set -- "$options"
if which dpkg > /dev/null 2>&1 ; then
arch=$(dpkg --print-architecture)
else
arch=$(uname -m)
if [ "$arch" = "i686" ]; then
arch="i386"
elif [ "$arch" = "x86_64" ]; then
arch="amd64"
elif [ "$arch" = "armv7l" ]; then
arch="armhf"
fi
fi
hostarch=$arch
while true
do
case "$1" in
-h|--help) usage $0 && exit 1;;
-p|--path) path=$2; shift 2;;
--rootfs) rootfs=$2; shift 2;;
-a|--arch) arch=$2; shift 2;;
-r|--release) release=$2; shift 2;;
-n|--name) name=$2; shift 2;;
-c|--clean) clean=$2; shift 1;;
--) shift 1; break ;;
*) break ;;
esac
done
if [ ! -z "$clean" -a -z "$path" ]; then
clean || exit 1
exit 0
fi
if [ "$arch" = "i686" ]; then
arch=i386
fi
if [ "$arch" = "x86_64" ]; then
arch=amd64
fi
if [ $hostarch = "i386" -a $arch = "amd64" ]; then
echo "can't create $arch container on $hostarch"
exit 1
fi
if [ $hostarch = "armhf" -o $hostarch = "armel" ] && \
[ $arch != "armhf" -a $arch != "armel" ]; then
echo "can't create $arch container on $hostarch"
exit 1
fi
if [ $hostarch = "powerpc" -a $arch != "powerpc" ]; then
echo "can't create $arch container on $hostarch"
exit 1
fi
type debootstrap
if [ $? -ne 0 ]; then
echo "'debootstrap' command is missing"
exit 1
fi
if [ -z "$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
current_release=`wget ${MIRROR}/dists/stable/Release -O - 2> /dev/null | head |awk '/^Codename: (.*)$/ { print $2; }'`
#current_release=`wget ${MIRROR}/dists/testing/Release -O - 2> /dev/null | head |awk '/^Codename: (.*)$/ { print $2; }'`
release=${release:-${current_release}}
valid_releases=('jessie' 'ascii' 'ceres' 'sid')
if [[ ! "${valid_releases[*]}" =~ (^|[^[:alpha:]])$release([^[:alpha:]]|$) ]]; then
echo "Invalid release ${release}, valid ones are: ${valid_releases[*]}"
exit 1
fi
# detect rootfs
config="$path/config"
if [ -z "$rootfs" ]; then
if grep -q '^lxc.rootfs' $config 2> /dev/null ; then
rootfs=$(awk -F= '/^lxc.rootfs =/{ print $2 }' $config)
else
rootfs=$path/rootfs
fi
fi
install_debian $rootfs $release $arch
if [ $? -ne 0 ]; then
echo "failed to install debian"
exit 1
fi
configure_debian $rootfs $name
if [ $? -ne 0 ]; then
echo "failed to configure debian for a container"
exit 1
fi
copy_configuration $path $rootfs $name $arch
if [ $? -ne 0 ]; then
echo "failed write configuration file"
exit 1
fi
#configure_debian_systemd $path $rootfs
if [ ! -z $clean ]; then
clean || exit 1
exit 0
fi