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1#!/bin/sh
2
3#
4# template script for generating PLD Linux container for LXC
5#
6
7#
8# lxc: Linux Container library
9
10# Authors:
11# Elan Ruusamäe <glen@pld-linux.org>
12
13# This library is free software; you can redistribute it and/or
14# modify it under the terms of the GNU Lesser General Public
15# License as published by the Free Software Foundation; either
16# version 2.1 of the License, or (at your option) any later version.
17
18# This library is distributed in the hope that it will be useful,
19# but WITHOUT ANY WARRANTY; without even the implied warranty of
20 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
21# Lesser General Public License for more details.
22
23# You should have received a copy of the GNU Lesser General Public
24# License along with this library; if not, write to the Free Software
25# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26
27# Configuration
28arch=$(uname -m)
29cache_base=@LOCALSTATEDIR@/cache/lxc/pld/$arch
30default_path=@LXCPATH@
31root_password=root
32
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33if [ -e /etc/os-release ]; then
34 # This is a shell friendly configuration file. We can just source it.
35 # What we're looking for in here is the ID, VERSION_ID and the CPE_NAME
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36 . /etc/os-release
37 echo "Host CPE ID from /etc/os-release: ${CPE_NAME}"
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38fi
39
40if [ "${CPE_NAME}" != "" -a "${ID}" = "pld" -a "${VERSION_ID}" != "" ]; then
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41 pld_host_ver=${VERSION_ID}
42 is_pld=true
8a96554a 43elif [ -e /etc/pld-release ]; then
3a633be6 44 # Only if all other methods fail, try to parse the pld-release file.
8a96554a 45 pld_host_ver=$(sed -e '/PLD /!d' -e 's/^\([0-9.]*\)\sPLD.*/\1/' < /etc/pld-release)
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46 if [ "$pld_host_ver" != "" ]; then
47 is_pld=true
48 fi
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49fi
50
51# Map a few architectures to their generic PLD Linux repository archs.
52case "$pld_host_ver:$arch" in
533.0:i586) arch=i486 ;;
54esac
55
56configure_pld()
57{
58
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59 # disable selinux
60 mkdir -p $rootfs_path/selinux
61 echo 0 > $rootfs_path/selinux/enforce
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62
63 # configure the network using the dhcp
81df6899 64 sed -i -e "s/^HOSTNAME=.*/HOSTNAME=${utsname}/" ${rootfs_path}/etc/sysconfig/network
8a96554a 65
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66 # set hostname on systemd
67 if [ $release = "3.0" ]; then
68 echo "${utsname}" > ${rootfs_path}/etc/hostname
69 fi
8a96554a 70
3a633be6 71 # set minimal hosts
90e87d7e 72 test -e $rootfs_path/etc/hosts || \
3a633be6 73 cat <<EOF > $rootfs_path/etc/hosts
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74127.0.0.1 localhost.localdomain localhost $utsname
75::1 localhost6.localdomain6 localhost6
76EOF
77
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78 dev_path="${rootfs_path}/dev"
79 rm -rf $dev_path
80 mkdir -p $dev_path
81 mknod -m 666 ${dev_path}/null c 1 3
82 mknod -m 666 ${dev_path}/zero c 1 5
83 mknod -m 666 ${dev_path}/random c 1 8
84 mknod -m 666 ${dev_path}/urandom c 1 9
85 mkdir -m 755 ${dev_path}/pts
86 mkdir -m 1777 ${dev_path}/shm
87 mknod -m 666 ${dev_path}/tty c 5 0
88 mknod -m 666 ${dev_path}/tty0 c 4 0
89 mknod -m 666 ${dev_path}/tty1 c 4 1
90 mknod -m 666 ${dev_path}/tty2 c 4 2
91 mknod -m 666 ${dev_path}/tty3 c 4 3
92 mknod -m 666 ${dev_path}/tty4 c 4 4
93 mknod -m 600 ${dev_path}/console c 5 1
94 mknod -m 666 ${dev_path}/full c 1 7
95 mknod -m 600 ${dev_path}/initctl p
96 mknod -m 666 ${dev_path}/ptmx c 5 2
97
98 echo "setting root passwd to $root_password"
99 echo "root:$root_password" | chroot $rootfs_path chpasswd
100
101 return 0
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102}
103
104configure_pld_init()
105{
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106 # default powerfail action waits 2 minutes. for lxc we want it immediately
107 sed -i -e '/^pf::powerfail:/ s,/sbin/shutdown.*,/sbin/halt,' ${rootfs_path}/etc/inittab
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108}
109
110configure_pld_systemd()
111{
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112 unlink ${rootfs_path}/etc/systemd/system/default.target
113 chroot ${rootfs_path} ln -s /dev/null /etc/systemd/system/udev.service
114 chroot ${rootfs_path} ln -s /lib/systemd/system/multi-user.target /etc/systemd/system/default.target
115
116 # Actually, the After=dev-%i.device line does not appear in the
117 # Fedora 17 or Fedora 18 systemd getty@.service file. It may be left
118 # over from an earlier version and it's not doing any harm. We do need
119 # to disable the "ConditionalPathExists=/dev/tty0" line or no gettys are
120 # started on the ttys in the container. Lets do it in an override copy of
121 # the service so it can still pass rpm verifies and not be automatically
122 # updated by a new systemd version. -- mhw /\/\|=mhw=|\/\/
123
124 sed -e 's/^ConditionPathExists=/# ConditionPathExists=/' \
125 -e 's/After=dev-%i.device/After=/' \
126 < ${rootfs_path}/lib/systemd/system/getty@.service \
127 > ${rootfs_path}/etc/systemd/system/getty@.service
128
129 # Setup getty service on the 4 ttys we are going to allow in the
130 # default config. Number should match lxc.tty
8a96554a 131 for i in 1 2 3 4; do
3a633be6 132 ln -sf ../getty@.service ${rootfs_path}/etc/systemd/system/getty.target.wants/getty@tty${i}.service
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133 done
134}
135
136download_pld()
137{
138
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139 # check the mini pld was not already downloaded
140 INSTALL_ROOT=$cache/partial
141 mkdir -p $INSTALL_ROOT
142 if [ $? -ne 0 ]; then
143 echo "Failed to create '$INSTALL_ROOT' directory"
144 return 1
145 fi
8a96554a 146
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147 # download a mini pld into a cache
148 echo "Downloading PLD Linux minimal ..."
149 POLDEK="poldek --root $INSTALL_ROOT --noask --nohold --noignore"
150 PKG_LIST="basesystem filesystem pld-release rpm poldek vserver-packages rc-scripts pwdutils mingetty"
8a96554a 151
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152 mkdir -p $INSTALL_ROOT@LOCALSTATEDIR@/lib/rpm
153 rpm --root $INSTALL_ROOT --initdb
154 $POLDEK -u $PKG_LIST
8a96554a 155
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156 if [ $? -ne 0 ]; then
157 echo "Failed to download the rootfs, aborting."
158 return 1
159 fi
8a96554a 160
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161 mv "$INSTALL_ROOT" "$cache/rootfs"
162 echo "Download complete."
8a96554a 163
3a633be6 164 return 0
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165}
166
167copy_pld()
168{
169
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170 # make a local copy of the minipld
171 echo -n "Copying rootfs to $rootfs_path ..."
da705de9 172 cp -a $cache/rootfs/* $rootfs_path || return 1
3a633be6 173 return 0
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174}
175
176update_pld()
177{
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178 POLDEK="poldek --root $cache/rootfs --noask"
179 $POLDEK --upgrade-dist
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180}
181
182install_pld()
183{
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184 mkdir -p @LOCALSTATEDIR@/lock/subsys/
185 (
a992b44b 186 flock -x 9
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187 if [ $? -ne 0 ]; then
188 echo "Cache repository is busy."
189 return 1
190 fi
191
192 echo "Checking cache download in $cache/rootfs ... "
193 if [ ! -e "$cache/rootfs" ]; then
194 download_pld
195 if [ $? -ne 0 ]; then
196 echo "Failed to download 'pld base'"
197 return 1
198 fi
199 else
200 echo "Cache found. Updating..."
201 update_pld
202 if [ $? -ne 0 ]; then
203 echo "Failed to update 'pld base', continuing with last known good cache"
204 else
205 echo "Update finished"
206 fi
207 fi
208
209 echo "Copy $cache/rootfs to $rootfs_path ... "
210 copy_pld
211 if [ $? -ne 0 ]; then
212 echo "Failed to copy rootfs"
213 return 1
214 fi
215
216 return 0
a992b44b 217 ) 9>@LOCALSTATEDIR@/lock/subsys/lxc-pld
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218
219 return $?
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220}
221
222copy_configuration()
223{
224
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225 mkdir -p $config_path
226 grep -q "^lxc.rootfs" $config_path/config 2>/dev/null || echo "lxc.rootfs = $rootfs_path" >> $config_path/config
227 cat <<EOF >> $config_path/config
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228# Most of below settings should be taken as defaults from
229# lxc.include = /usr/share/lxc/config/common.conf
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230lxc.utsname = $utsname
231lxc.tty = 4
232lxc.pts = 1024
63d035e9 233# Consider if below line is right for systemd container
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234lxc.mount = $config_path/fstab
235lxc.cap.drop = sys_module mac_admin mac_override sys_time
236
237lxc.autodev = $auto_dev
238
239# When using LXC with apparmor, uncomment the next line to run unconfined:
240#lxc.aa_profile = unconfined
241
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242## Devices
243# Allow all devices
244#lxc.cgroup.devices.allow = a
245# Deny all devices
8a96554a 246lxc.cgroup.devices.deny = a
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247# Allow to mknod all devices (but not using them)
248lxc.cgroup.devices.allow = c *:* m
249lxc.cgroup.devices.allow = b *:* m
250
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251# /dev/null and zero
252lxc.cgroup.devices.allow = c 1:3 rwm
253lxc.cgroup.devices.allow = c 1:5 rwm
254# consoles
255lxc.cgroup.devices.allow = c 5:1 rwm
256lxc.cgroup.devices.allow = c 5:0 rwm
257lxc.cgroup.devices.allow = c 4:0 rwm
258lxc.cgroup.devices.allow = c 4:1 rwm
259# /dev/{,u}random
260lxc.cgroup.devices.allow = c 1:9 rwm
261lxc.cgroup.devices.allow = c 1:8 rwm
262lxc.cgroup.devices.allow = c 136:* rwm
263lxc.cgroup.devices.allow = c 5:2 rwm
264# rtc
265lxc.cgroup.devices.allow = c 254:0 rm
266EOF
267
3a633be6 268 cat <<EOF > $config_path/fstab
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269proc proc proc nodev,noexec,nosuid 0 0
270sysfs sys sysfs defaults 0 0
271EOF
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272 if [ $? -ne 0 ]; then
273 echo "Failed to add configuration"
274 return 1
275 fi
8a96554a 276
3a633be6 277 return 0
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278}
279
280clean()
281{
282
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283 if [ ! -e $cache ]; then
284 exit 0
285 fi
286
287 # lock, so we won't purge while someone is creating a repository
288 (
a992b44b 289 flock -x 9
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290 if [ $? != 0 ]; then
291 echo "Cache repository is busy."
292 exit 1
293 fi
294
295 echo -n "Purging the download cache for PLD Linux $release..."
296 rm --preserve-root --one-file-system -rf $cache && echo "Done." || exit 1
297 exit 0
a992b44b 298 ) 9>@LOCALSTATEDIR@/lock/subsys/lxc-pld
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299}
300
301usage()
302{
3a633be6 303 cat <<EOF
8a96554a 304usage:
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305 $1 -n|--name=<container_name>
306 [-p|--path=<path>] [-c|--clean] [-R|--release=<PLD Release>] [--fqdn=<network name of container>] [-A|--arch=<arch of the container>]
307 [-h|--help]
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308Mandatory args:
309 -n,--name container name, used to as an identifier for that container from now on
310Optional args:
311 -p,--path path to where the container will be created, defaults to @LXCPATH@. The container config will go under @LXCPATH@ in that case
312 --rootfs path for actual rootfs.
313 -c,--clean clean the cache
314 -R,--release PLD Linux release for the new container. if the host is PLD Linux, then it will default to the host's release.
3a633be6 315 --fqdn fully qualified domain name (FQDN) for DNS and system naming
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316 -A,--arch NOT USED YET. Define what arch the container will be [i686,x86_64]
317 -h,--help print this help
318EOF
3a633be6 319 return 0
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320}
321
322options=$(getopt -o hp:n:cR: -l help,path:,rootfs:,name:,clean,release:,fqdn: -- "$@")
323if [ $? -ne 0 ]; then
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324 usage $(basename $0)
325 exit 1
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326fi
327eval set -- "$options"
328
329while :; do
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330 case "$1" in
331 -h|--help) usage $0 && exit 0;;
332 -p|--path) path=$2; shift 2;;
333 --rootfs) rootfs=$2; shift 2;;
334 -n|--name) name=$2; shift 2;;
335 -c|--clean) clean=$2; shift 2;;
336 -R|--release) release=$2; shift 2;;
337 --fqdn) utsname=$2; shift 2;;
338 --) shift 1; break ;;
339 *) break ;;
340 esac
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341done
342
343if [ ! -z "$clean" -a -z "$path" ]; then
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344 clean || exit 1
345 exit 0
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346fi
347
348if [ -z "${utsname}" ]; then
3a633be6 349 utsname=${name}
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350fi
351
352# This follows a standard "resolver" convention that an FQDN must have
353# at least two dots or it is considered a local relative host name.
354# If it doesn't, append the dns domain name of the host system.
355#
356# This changes one significant behavior when running
357# "lxc_create -n Container_Name" without using the
358# --fqdn option.
359#
360# Old behavior:
361# utsname and hostname = Container_Name
362# New behavior:
363# utsname and hostname = Container_Name.Domain_Name
364
365if [ $(expr "$utsname" : '.*\..*\.') = 0 ]; then
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366 if [ -n "$(dnsdomainname)" ]; then
367 utsname=${utsname}.$(dnsdomainname)
368 fi
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369fi
370
371needed_pkgs=""
372type poldek >/dev/null 2>&1
373if [ $? -ne 0 ]; then
3a633be6 374 needed_pkgs="poldek $needed_pkgs"
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375fi
376
377#type curl >/dev/null 2>&1
378#if [ $? -ne 0 ]; then
3a633be6 379# needed_pkgs="curl $needed_pkgs"
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380#fi
381
382if [ -n "$needed_pkgs" ]; then
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383 echo "Missing commands: $needed_pkgs"
384 echo "Please install these using \"sudo poldek -u $needed_pkgs\""
385 exit 1
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386fi
387
388if [ -z "$path" ]; then
3a633be6 389 path=$default_path/$name
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390fi
391
392if [ -z "$release" ]; then
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393 if [ "$is_pld" -a "$pld_host_ver" ]; then
394 release=$pld_host_ver
395 else
396 echo "This is not a PLD Linux host and release missing, defaulting to 3.0. use -R|--release to specify release"
397 release=3.0
398 fi
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399fi
400
401# pld th have systemd. We need autodev enabled to keep systemd from causing problems.
402if [ $release = 3.0 ]; then
3a633be6 403 auto_dev="0"
8a96554a 404else
3a633be6 405 auto_dev="0"
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406fi
407
408if [ "$(id -u)" != "0" ]; then
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409 echo "This script should be run as 'root'"
410 exit 1
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411fi
412
82a3991b 413if [ -z "$rootfs" ]; then
414 rootfs_path=$path/rootfs
415 # check for 'lxc.rootfs' passed in through default config by lxc-create
416 # TODO: should be lxc.rootfs.mount used instead?
417 if grep -q '^lxc.rootfs' $path/config 2>/dev/null ; then
418 rootfs_path=$(awk -F= '/^lxc.rootfs =/{ print $2 }' $path/config)
419 fi
420else
421 rootfs_path=$rootfs
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422fi
423config_path=$default_path/$name
424cache=$cache_base/$release
425
426revert()
427{
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428 echo "Interrupted, so cleaning up"
429 lxc-destroy -n $name
430 # maybe was interrupted before copy config
431 rm -rf $path
432 rm -rf $default_path/$name
433 echo "exiting..."
434 exit 1
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435}
436
437trap revert SIGHUP SIGINT SIGTERM
438
439copy_configuration
440if [ $? -ne 0 ]; then
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441 echo "Failed write configuration file"
442 exit 1
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443fi
444
445install_pld
446if [ $? -ne 0 ]; then
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447 echo "Failed to install PLD Linux"
448 exit 1
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449fi
450
451configure_pld
452if [ $? -ne 0 ]; then
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453 echo "Failed to configure PLD Linux for a container"
454 exit 1
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455fi
456
457# If the systemd configuration directory exists - set it up for what we need.
458if [ -d ${rootfs_path}/etc/systemd/system ]; then
3a633be6 459 configure_pld_systemd
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460fi
461
462# This configuration (rc.sysinit) is not inconsistent with the systemd stuff
3a633be6 463# above and may actually coexist on some upgraded systems. Let's just make
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464# sure that, if it exists, we update this file, even if it's not used...
465if [ -f ${rootfs_path}/etc/rc.sysinit ]; then
3a633be6 466 configure_pld_init
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467fi
468
469if [ ! -z $clean ]; then
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470 clean || exit 1
471 exit 0
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472fi
473echo "container rootfs and config created"
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