templates/lxc-ubuntu.in

   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 $rootfs chpasswd
  81     fi
  82
  83     # make sure we have the current locale defined in the container
  84     if [ -z "$LANG" ]; then
  85         chroot $rootfs locale-gen en_US.UTF-8
  86         chroot $rootfs update-locale LANG=en_US.UTF-8
  87     else
  88         chroot $rootfs locale-gen $LANG
  89         chroot $rootfs update-locale LANG=$LANG
  90     fi
  91
  92     return 0
  93 }
  94
  95 # finish setting up the user in the container by injecting ssh key and
  96 # adding sudo group membership.
  97 # passed-in user is either 'ubuntu' or the user to bind in from host.
  98 finalize_user()
  99 {
 100     user=$1
 101
 102     sudo_version=$(chroot $rootfs dpkg-query -W -f='${Version}' sudo)
 103
 104     if chroot $rootfs dpkg --compare-versions $sudo_version gt "1.8.3p1-1"; then
 105         groups="sudo"
 106     else
 107         groups="sudo admin"
 108     fi
 109
 110     for group in $groups; do
 111         chroot $rootfs groupadd --system $group >/dev/null 2>&1 || true
 112         chroot $rootfs adduser ${user} $group >/dev/null 2>&1 || true
 113     done
 114
 115     if [ -n "$auth_key" -a -f "$auth_key" ]; then
 116         u_path="/home/${user}/.ssh"
 117         root_u_path="$rootfs/$u_path"
 118         mkdir -p $root_u_path
 119         cp $auth_key "$root_u_path/authorized_keys"
 120         chroot $rootfs chown -R ${user}: "$u_path"
 121
 122         echo "Inserted SSH public key from $auth_key into /home/${user}/.ssh/authorized_keys"
 123     fi
 124     return 0
 125 }
 126
 127 write_sourceslist()
 128 {
 129     # $1 => path to the rootfs
 130     # $2 => architecture we want to add
 131     # $3 => whether to use the multi-arch syntax or not
 132
 133     case $2 in
 134       amd64|i386)
 135             MIRROR=${MIRROR:-http://archive.ubuntu.com/ubuntu}
 136             SECURITY_MIRROR=${SECURITY_MIRROR:-http://security.ubuntu.com/ubuntu}
 137             ;;
 138       *)
 139             MIRROR=${MIRROR:-http://ports.ubuntu.com/ubuntu-ports}
 140             SECURITY_MIRROR=${SECURITY_MIRROR:-http://ports.ubuntu.com/ubuntu-ports}
 141             ;;
 142     esac
 143     if [ -n "$3" ]; then
 144         cat >> "$1/etc/apt/sources.list" << EOF
 145 deb [arch=$2] $MIRROR ${release} main restricted universe multiverse
 146 deb [arch=$2] $MIRROR ${release}-updates main restricted universe multiverse
 147 deb [arch=$2] $SECURITY_MIRROR ${release}-security main restricted universe multiverse
 148 EOF
 149     else
 150         cat >> "$1/etc/apt/sources.list" << EOF
 151 deb $MIRROR ${release} main restricted universe multiverse
 152 deb $MIRROR ${release}-updates main restricted universe multiverse
 153 deb $SECURITY_MIRROR ${release}-security main restricted universe multiverse
 154 EOF
 155     fi
 156 }
 157
 158 cleanup()
 159 {
 160     rm -rf $cache/partial-$arch
 161     rm -rf $cache/rootfs-$arch
 162 }
 163
 164 suggest_flush()
 165 {
 166     echo "Container upgrade failed.  The container cache may be out of date,"
 167     echo "in which case flushing the case (see -F in the hep output) may help."
 168 }
 169
 170 download_ubuntu()
 171 {
 172     cache=$1
 173     arch=$2
 174     release=$3
 175
 176     packages=vim,ssh
 177
 178     # Try to guess a list of langpacks to install
 179     langpacks="language-pack-en"
 180
 181     if which dpkg >/dev/null 2>&1; then
 182         langpacks=`(echo $langpacks &&
 183                     dpkg -l | grep -E "^ii  language-pack-[a-z]* " |
 184                         cut -d ' ' -f3) | sort -u`
 185     fi
 186     packages="$packages,$(echo $langpacks | sed 's/ /,/g')"
 187
 188
 189     echo "installing packages: $packages"
 190
 191     trap cleanup EXIT SIGHUP SIGINT SIGTERM
 192     # check the mini ubuntu was not already downloaded
 193     mkdir -p "$cache/partial-$arch"
 194     if [ $? -ne 0 ]; then
 195         echo "Failed to create '$cache/partial-$arch' directory"
 196         return 1
 197     fi
 198
 199     # download a mini ubuntu into a cache
 200     echo "Downloading ubuntu $release minimal ..."
 201     if [ -n "$(which qemu-debootstrap)" ]; then
 202         qemu-debootstrap --verbose --components=main,universe --arch=$arch --include=$packages $release $cache/partial-$arch $MIRROR
 203     else
 204         debootstrap --verbose --components=main,universe --arch=$arch --include=$packages $release $cache/partial-$arch $MIRROR
 205     fi
 206
 207     if [ $? -ne 0 ]; then
 208         echo "Failed to download the rootfs, aborting."
 209             return 1
 210     fi
 211
 212     # Serge isn't sure whether we should avoid doing this when
 213     # $release == `distro-info -d`
 214     echo "Installing updates"
 215     > $cache/partial-$arch/etc/apt/sources.list
 216     write_sourceslist $cache/partial-$arch/ $arch
 217
 218     chroot "$1/partial-${arch}" apt-get update
 219     if [ $? -ne 0 ]; then
 220         echo "Failed to update the apt cache"
 221         return 1
 222     fi
 223     cat > "$1/partial-${arch}"/usr/sbin/policy-rc.d << EOF
 224 #!/bin/sh
 225 exit 101
 226 EOF
 227     chmod +x "$1/partial-${arch}"/usr/sbin/policy-rc.d
 228
 229     lxc-unshare -s MOUNT -- chroot "$1/partial-${arch}" apt-get dist-upgrade -y || { suggest_flush; false; }
 230     rm -f "$1/partial-${arch}"/usr/sbin/policy-rc.d
 231
 232     chroot "$1/partial-${arch}" apt-get clean
 233
 234     mv "$1/partial-$arch" "$1/rootfs-$arch"
 235     trap EXIT
 236     trap SIGINT
 237     trap SIGTERM
 238     trap SIGHUP
 239     echo "Download complete"
 240     return 0
 241 }
 242
 243 copy_ubuntu()
 244 {
 245     cache=$1
 246     arch=$2
 247     rootfs=$3
 248
 249     # make a local copy of the miniubuntu
 250     echo "Copying rootfs to $rootfs ..."
 251     mkdir -p $rootfs
 252     rsync -Ha $cache/rootfs-$arch/ $rootfs/ || return 1
 253     return 0
 254 }
 255
 256 install_ubuntu()
 257 {
 258     rootfs=$1
 259     release=$2
 260     flushcache=$3
 261     cache="@LOCALSTATEDIR@/cache/lxc/$release"
 262     mkdir -p @LOCALSTATEDIR@/lock/subsys/
 263
 264     (
 265         flock -x 200
 266         if [ $? -ne 0 ]; then
 267             echo "Cache repository is busy."
 268             return 1
 269         fi
 270
 271
 272         if [ $flushcache -eq 1 ]; then
 273             echo "Flushing cache..."
 274             rm -rf "$cache/partial-$arch"
 275             rm -rf "$cache/rootfs-$arch"
 276         fi
 277
 278         echo "Checking cache download in $cache/rootfs-$arch ... "
 279         if [ ! -e "$cache/rootfs-$arch" ]; then
 280             download_ubuntu $cache $arch $release
 281             if [ $? -ne 0 ]; then
 282                 echo "Failed to download 'ubuntu $release base'"
 283                 return 1
 284             fi
 285         fi
 286
 287         echo "Copy $cache/rootfs-$arch to $rootfs ... "
 288         copy_ubuntu $cache $arch $rootfs
 289         if [ $? -ne 0 ]; then
 290             echo "Failed to copy rootfs"
 291             return 1
 292         fi
 293
 294         return 0
 295
 296     ) 200>@LOCALSTATEDIR@/lock/subsys/lxc-ubuntu
 297
 298     return $?
 299 }
 300
 301 copy_configuration()
 302 {
 303     path=$1
 304     rootfs=$2
 305     name=$3
 306     arch=$4
 307     release=$5
 308
 309     if [ $arch = "i386" ]; then
 310         arch="i686"
 311     fi
 312
 313     ttydir=""
 314     if [ -f $rootfs/etc/init/container-detect.conf ]; then
 315         ttydir=" lxc"
 316     fi
 317
 318     # if there is exactly one veth network entry, make sure it has an
 319     # associated hwaddr.
 320     nics=`grep -e '^lxc\.network\.type[ \t]*=[ \t]*veth' $path/config | wc -l`
 321     if [ $nics -eq 1 ]; then
 322         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
 323     fi
 324
 325     grep -q "^lxc.rootfs" $path/config 2>/dev/null || echo "lxc.rootfs = $rootfs" >> $path/config
 326     cat <<EOF >> $path/config
 327 lxc.mount = $path/fstab
 328 lxc.pivotdir = lxc_putold
 329
 330 lxc.devttydir =$ttydir
 331 lxc.tty = 4
 332 lxc.pts = 1024
 333
 334 lxc.utsname = $name
 335 lxc.arch = $arch
 336 lxc.cap.drop = sys_module mac_admin mac_override
 337
 338 # When using LXC with apparmor, uncomment the next line to run unconfined:
 339 #lxc.aa_profile = unconfined
 340
 341 lxc.cgroup.devices.deny = a
 342 # Allow any mknod (but not using the node)
 343 lxc.cgroup.devices.allow = c *:* m
 344 lxc.cgroup.devices.allow = b *:* m
 345 # /dev/null and zero
 346 lxc.cgroup.devices.allow = c 1:3 rwm
 347 lxc.cgroup.devices.allow = c 1:5 rwm
 348 # consoles
 349 lxc.cgroup.devices.allow = c 5:1 rwm
 350 lxc.cgroup.devices.allow = c 5:0 rwm
 351 #lxc.cgroup.devices.allow = c 4:0 rwm
 352 #lxc.cgroup.devices.allow = c 4:1 rwm
 353 # /dev/{,u}random
 354 lxc.cgroup.devices.allow = c 1:9 rwm
 355 lxc.cgroup.devices.allow = c 1:8 rwm
 356 lxc.cgroup.devices.allow = c 136:* rwm
 357 lxc.cgroup.devices.allow = c 5:2 rwm
 358 # rtc
 359 lxc.cgroup.devices.allow = c 254:0 rwm
 360 #fuse
 361 lxc.cgroup.devices.allow = c 10:229 rwm
 362 #tun
 363 lxc.cgroup.devices.allow = c 10:200 rwm
 364 #full
 365 lxc.cgroup.devices.allow = c 1:7 rwm
 366 #hpet
 367 lxc.cgroup.devices.allow = c 10:228 rwm
 368 #kvm
 369 lxc.cgroup.devices.allow = c 10:232 rwm
 370 EOF
 371
 372     cat <<EOF > $path/fstab
 373 proc            proc         proc    nodev,noexec,nosuid 0 0
 374 sysfs           sys          sysfs defaults  0 0
 375 EOF
 376
 377     if [ $? -ne 0 ]; then
 378         echo "Failed to add configuration"
 379         return 1
 380     fi
 381
 382     return 0
 383 }
 384
 385 trim()
 386 {
 387     rootfs=$1
 388     release=$2
 389
 390     # provide the lxc service
 391     cat <<EOF > $rootfs/etc/init/lxc.conf
 392 # fake some events needed for correct startup other services
 393
 394 description     "Container Upstart"
 395
 396 start on startup
 397
 398 script
 399         rm -rf /var/run/*.pid
 400         rm -rf /var/run/network/*
 401         /sbin/initctl emit stopped JOB=udevtrigger --no-wait
 402         /sbin/initctl emit started JOB=udev --no-wait
 403 end script
 404 EOF
 405
 406     # fix buggus runlevel with sshd
 407     cat <<EOF > $rootfs/etc/init/ssh.conf
 408 # ssh - OpenBSD Secure Shell server
 409 #
 410 # The OpenSSH server provides secure shell access to the system.
 411
 412 description     "OpenSSH server"
 413
 414 start on filesystem
 415 stop on runlevel [!2345]
 416
 417 expect fork
 418 respawn
 419 respawn limit 10 5
 420 umask 022
 421 # replaces SSHD_OOM_ADJUST in /etc/default/ssh
 422 oom never
 423
 424 pre-start script
 425     test -x /usr/sbin/sshd || { stop; exit 0; }
 426     test -e /etc/ssh/sshd_not_to_be_run && { stop; exit 0; }
 427     test -c /dev/null || { stop; exit 0; }
 428
 429     mkdir -p -m0755 /var/run/sshd
 430 end script
 431
 432 # if you used to set SSHD_OPTS in /etc/default/ssh, you can change the
 433 # 'exec' line here instead
 434 exec /usr/sbin/sshd
 435 EOF
 436
 437     cat <<EOF > $rootfs/etc/init/console.conf
 438 # console - getty
 439 #
 440 # This service maintains a console on tty1 from the point the system is
 441 # started until it is shut down again.
 442
 443 start on stopped rc RUNLEVEL=[2345]
 444 stop on runlevel [!2345]
 445
 446 respawn
 447 exec /sbin/getty -8 38400 /dev/console
 448 EOF
 449
 450     cat <<EOF > $rootfs/lib/init/fstab
 451 # /lib/init/fstab: cleared out for bare-bones lxc
 452 EOF
 453
 454     # remove pointless services in a container
 455     chroot $rootfs /usr/sbin/update-rc.d -f ondemand remove
 456
 457     chroot $rootfs /bin/bash -c 'cd /etc/init; for f in $(ls u*.conf); do mv $f $f.orig; done'
 458     chroot $rootfs /bin/bash -c 'cd /etc/init; for f in $(ls tty[2-9].conf); do mv $f $f.orig; done'
 459     chroot $rootfs /bin/bash -c 'cd /etc/init; for f in $(ls plymouth*.conf); do mv $f $f.orig; done'
 460     chroot $rootfs /bin/bash -c 'cd /etc/init; for f in $(ls hwclock*.conf); do mv $f $f.orig; done'
 461     chroot $rootfs /bin/bash -c 'cd /etc/init; for f in $(ls module*.conf); do mv $f $f.orig; done'
 462
 463     # if this isn't lucid, then we need to twiddle the network upstart bits :(
 464     if [ $release != "lucid" ]; then
 465         sed -i 's/^.*emission handled.*$/echo Emitting lo/' $rootfs/etc/network/if-up.d/upstart
 466     fi
 467 }
 468
 469 post_process()
 470 {
 471     rootfs=$1
 472     release=$2
 473     trim_container=$3
 474
 475     if [ $trim_container -eq 1 ]; then
 476         trim $rootfs $release
 477     elif [ ! -f $rootfs/etc/init/container-detect.conf ]; then
 478         # Make sure we have a working resolv.conf
 479         cresolvonf="${rootfs}/etc/resolv.conf"
 480         mv $cresolvonf ${cresolvonf}.lxcbak
 481         cat /etc/resolv.conf > ${cresolvonf}
 482
 483         # for lucid, if not trimming, then add the ubuntu-virt
 484         # ppa and install lxcguest
 485         if [ $release = "lucid" ]; then
 486             chroot $rootfs apt-get update
 487             chroot $rootfs apt-get install --force-yes -y python-software-properties
 488             chroot $rootfs add-apt-repository ppa:ubuntu-virt/ppa
 489         fi
 490
 491         chroot $rootfs apt-get update
 492         chroot $rootfs apt-get install --force-yes -y lxcguest
 493
 494         # Restore old resolv.conf
 495         rm -f ${cresolvonf}
 496         mv ${cresolvonf}.lxcbak ${cresolvonf}
 497     fi
 498
 499     # If the container isn't running a native architecture, setup multiarch
 500     if [ -x "$(ls -1 ${rootfs}/usr/bin/qemu-*-static 2>/dev/null)" ]; then
 501         dpkg_version=$(chroot $rootfs dpkg-query -W -f='${Version}' dpkg)
 502         if chroot $rootfs dpkg --compare-versions $dpkg_version ge "1.16.2"; then
 503             chroot $rootfs dpkg --add-architecture ${hostarch}
 504         else
 505             mkdir -p ${rootfs}/etc/dpkg/dpkg.cfg.d
 506             echo "foreign-architecture ${hostarch}" > ${rootfs}/etc/dpkg/dpkg.cfg.d/lxc-multiarch
 507         fi
 508
 509         # Save existing value of MIRROR and SECURITY_MIRROR
 510         DEFAULT_MIRROR=$MIRROR
 511         DEFAULT_SECURITY_MIRROR=$SECURITY_MIRROR
 512
 513         # Write a new sources.list containing both native and multiarch entries
 514         > ${rootfs}/etc/apt/sources.list
 515         write_sourceslist $rootfs $arch "native"
 516
 517         MIRROR=$DEFAULT_MIRROR
 518         SECURITY_MIRROR=$DEFAULT_SECURITY_MIRROR
 519         write_sourceslist $rootfs $hostarch "multiarch"
 520
 521         # Finally update the lists and install upstart using the host architecture
 522         chroot $rootfs apt-get update
 523         chroot $rootfs apt-get install --force-yes -y --no-install-recommends upstart:${hostarch} mountall:${hostarch} iproute:${hostarch} isc-dhcp-client:${hostarch}
 524     fi
 525
 526     # rmdir /dev/shm for containers that have /run/shm
 527     # I'm afraid of doing rm -rf $rootfs/dev/shm, in case it did
 528     # get bind mounted to the host's /run/shm.  So try to rmdir
 529     # it, and in case that fails move it out of the way.
 530     if [ ! -L $rootfs/dev/shm ] && [ -d $rootfs/run/shm ] && [ -e $rootfs/dev/shm ]; then
 531         mv $rootfs/dev/shm $rootfs/dev/shm.bak
 532         ln -s /run/shm $rootfs/dev/shm
 533     fi
 534 }
 535
 536 do_bindhome()
 537 {
 538     rootfs=$1
 539     user=$2
 540
 541     # copy /etc/passwd, /etc/shadow, and /etc/group entries into container
 542     pwd=`getent passwd $user` || { echo "Failed to copy password entry for $user"; false; }
 543     echo $pwd >> $rootfs/etc/passwd
 544
 545     # make sure user's shell exists in the container
 546     shell=`echo $pwd | cut -d: -f 7`
 547     if [ ! -x $rootfs/$shell ]; then
 548         echo "shell $shell for user $user was not found in the container."
 549         pkg=`dpkg -S $(readlink -m $shell) | cut -d ':' -f1`
 550         echo "Installing $pkg"
 551         chroot $rootfs apt-get --force-yes -y install $pkg
 552     fi
 553
 554     shad=`getent shadow $user`
 555     echo "$shad" >> $rootfs/etc/shadow
 556
 557     # bind-mount the user's path into the container's /home
 558     h=`getent passwd $user | cut -d: -f 6`
 559     mkdir -p $rootfs/$h
 560
 561     # use relative path in container
 562     h2=${h#/}
 563     while [ ${h2:0:1} = "/" ]; do
 564         h2=${h2#/}
 565     done
 566     echo "$h $h2 none bind 0 0" >> $path/fstab
 567
 568     # Make sure the group exists in container
 569     grp=`echo $pwd | cut -d: -f 4`  # group number for $user
 570     grpe=`getent group $grp` || return 0  # if host doesn't define grp, ignore in container
 571     chroot $rootfs getent group "$grpe" || echo "$grpe" >> $rootfs/etc/group
 572 }
 573
 574 usage()
 575 {
 576     cat <<EOF
 577 $1 -h|--help [-a|--arch] [-b|--bindhome <user>] [--trim] [-d|--debug]
 578    [-F | --flush-cache] [-r|--release <release>] [ -S | --auth-key <keyfile>]
 579 release: the ubuntu release (e.g. precise): defaults to host release on ubuntu, otherwise uses latest LTS
 580 trim: make a minimal (faster, but not upgrade-safe) container
 581 bindhome: bind <user>'s home into the container
 582           The ubuntu user will not be created, and <user> will have
 583           sudo access.
 584 arch: the container architecture (e.g. amd64): defaults to host arch
 585 auth-key: SSH Public key file to inject into container
 586 EOF
 587     return 0
 588 }
 589
 590 options=$(getopt -o a:b:hp:r:xn:FS:d -l arch:,bindhome:,help,path:,release:,trim,name:,flush-cache,auth-key:,debug -- "$@")
 591 if [ $? -ne 0 ]; then
 592     usage $(basename $0)
 593     exit 1
 594 fi
 595 eval set -- "$options"
 596
 597 release=precise # Default to the last Ubuntu LTS release for non-Ubuntu systems
 598 if [ -f /etc/lsb-release ]; then
 599     . /etc/lsb-release
 600     if [ "$DISTRIB_ID" = "Ubuntu" ]; then
 601         release=$DISTRIB_CODENAME
 602     fi
 603 fi
 604
 605 bindhome=
 606 arch=$(arch)
 607
 608 # Code taken from debootstrap
 609 if [ -x /usr/bin/dpkg ] && /usr/bin/dpkg --print-architecture >/dev/null 2>&1; then
 610     arch=`/usr/bin/dpkg --print-architecture`
 611 elif which udpkg >/dev/null 2>&1 && udpkg --print-architecture >/dev/null 2>&1; then
 612     arch=`/usr/bin/udpkg --print-architecture`
 613 else
 614     arch=$(arch)
 615     if [ "$arch" = "i686" ]; then
 616         arch="i386"
 617     elif [ "$arch" = "x86_64" ]; then
 618         arch="amd64"
 619     elif [ "$arch" = "armv7l" ]; then
 620         arch="armhf"
 621     fi
 622 fi
 623
 624 debug=0
 625 trim_container=0
 626 hostarch=$arch
 627 flushcache=0
 628 while true
 629 do
 630     case "$1" in
 631     -h|--help)      usage $0 && exit 0;;
 632     -p|--path)      path=$2; shift 2;;
 633     -n|--name)      name=$2; shift 2;;
 634     -F|--flush-cache) flushcache=1; shift 1;;
 635     -r|--release)   release=$2; shift 2;;
 636     -b|--bindhome)  bindhome=$2; shift 2;;
 637     -a|--arch)      arch=$2; shift 2;;
 638     -x|--trim)      trim_container=1; shift 1;;
 639     -S|--auth-key)  auth_key=$2; shift 2;;
 640     -d|--debug)     debug=1; shift 1;;
 641     --)             shift 1; break ;;
 642         *)              break ;;
 643     esac
 644 done
 645
 646 if [ $debug -eq 1 ]; then
 647     set -x
 648 fi
 649
 650 if [ -n "$bindhome" ]; then
 651     pwd=`getent passwd $bindhome`
 652     if [ $? -ne 0 ]; then
 653         echo "Error: no password entry found for $bindhome"
 654         exit 1
 655     fi
 656 fi
 657
 658
 659 if [ "$arch" == "i686" ]; then
 660     arch=i386
 661 fi
 662
 663 if [ $hostarch = "i386" -a $arch = "amd64" ]; then
 664     echo "can't create $arch container on $hostarch"
 665     exit 1
 666 fi
 667
 668 if [ $hostarch = "armhf" -o $hostarch = "armel" ] && \
 669    [ $arch != "armhf" -a $arch != "armel" ]; then
 670     echo "can't create $arch container on $hostarch"
 671     exit 1
 672 fi
 673
 674 if [ $hostarch = "powerpc" -a $arch != "powerpc" ]; then
 675     echo "can't create $arch container on $hostarch"
 676     exit 1
 677 fi
 678
 679 which debootstrap >/dev/null 2>&1 || { echo "'debootstrap' command is missing" >&2; false; }
 680
 681 if [ -z "$path" ]; then
 682     echo "'path' parameter is required"
 683     exit 1
 684 fi
 685
 686 if [ "$(id -u)" != "0" ]; then
 687     echo "This script should be run as 'root'"
 688     exit 1
 689 fi
 690
 691 # detect rootfs
 692 config="$path/config"
 693 if grep -q '^lxc.rootfs' $config 2>/dev/null ; then
 694     rootfs=`grep 'lxc.rootfs =' $config | awk -F= '{ print $2 }'`
 695 else
 696     rootfs=$path/rootfs
 697 fi
 698
 699 install_ubuntu $rootfs $release $flushcache
 700 if [ $? -ne 0 ]; then
 701     echo "failed to install ubuntu $release"
 702     exit 1
 703 fi
 704
 705 configure_ubuntu $rootfs $name $release
 706 if [ $? -ne 0 ]; then
 707     echo "failed to configure ubuntu $release for a container"
 708     exit 1
 709 fi
 710
 711 copy_configuration $path $rootfs $name $arch $release
 712 if [ $? -ne 0 ]; then
 713     echo "failed write configuration file"
 714     exit 1
 715 fi
 716
 717 post_process $rootfs $release $trim_container
 718
 719 if [ -n "$bindhome" ]; then
 720     do_bindhome $rootfs $bindhome
 721     finalize_user $bindhome
 722 else
 723     finalize_user ubuntu
 724 fi
 725
 726 echo ""
 727 echo "##"
 728 if [ -n "$bindhome" ]; then
 729     echo "# Log in as user $bindhome"
 730 else
 731     echo "# The default user is 'ubuntu' with password 'ubuntu'!"
 732     echo "# Use the 'sudo' command to run tasks as root in the container."
 733 fi
 734 echo "##"
 735 echo ""