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 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  26
  27 set -e
  28
  29 LOCALSTATEDIR="@LOCALSTATEDIR@"
  30 LXC_TEMPLATE_CONFIG="@LXCTEMPLATECONFIG@"
  31
  32 if [ -r /etc/default/lxc ]; then
  33     . /etc/default/lxc
  34 fi
  35
  36 configure_ubuntu()
  37 {
  38     rootfs=$1
  39     hostname=$2
  40     release=$3
  41     user=$4
  42     password=$5
  43
  44     # configure the network using the dhcp
  45     cat <<EOF > $rootfs/etc/network/interfaces
  46 # This file describes the network interfaces available on your system
  47 # and how to activate them. For more information, see interfaces(5).
  48
  49 # The loopback network interface
  50 auto lo
  51 iface lo inet loopback
  52
  53 auto eth0
  54 iface eth0 inet dhcp
  55 EOF
  56
  57     # set the hostname
  58     cat <<EOF > $rootfs/etc/hostname
  59 $hostname
  60 EOF
  61     # set minimal hosts
  62     cat <<EOF > $rootfs/etc/hosts
  63 127.0.0.1   localhost
  64 127.0.1.1   $hostname
  65
  66 # The following lines are desirable for IPv6 capable hosts
  67 ::1     ip6-localhost ip6-loopback
  68 fe00::0 ip6-localnet
  69 ff00::0 ip6-mcastprefix
  70 ff02::1 ip6-allnodes
  71 ff02::2 ip6-allrouters
  72 EOF
  73
  74     if [ ! -f $rootfs/etc/init/container-detect.conf ]; then
  75         # suppress log level output for udev
  76         sed -i "s/=\"err\"/=0/" $rootfs/etc/udev/udev.conf
  77
  78         # remove jobs for consoles 5 and 6 since we only create 4 consoles in
  79         # this template
  80         rm -f $rootfs/etc/init/tty{5,6}.conf
  81     fi
  82
  83     if [ -z "$bindhome" ]; then
  84         chroot $rootfs useradd --create-home -s /bin/bash $user
  85         echo "$user:$password" | chroot $rootfs chpasswd
  86     fi
  87
  88     # make sure we have the current locale defined in the container
  89     if [ -z "$LANG" ] || echo $LANG | grep -E -q "^C(\..+)*$"; then
  90         chroot $rootfs locale-gen en_US.UTF-8
  91         chroot $rootfs update-locale LANG=en_US.UTF-8
  92     else
  93         chroot $rootfs locale-gen $LANG
  94         chroot $rootfs update-locale LANG=$LANG
  95     fi
  96
  97     # generate new SSH keys
  98     if [ -x $rootfs$LOCALSTATEDIR/lib/dpkg/info/openssh-server.postinst ]; then
  99         cat > $rootfs/usr/sbin/policy-rc.d << EOF
 100 #!/bin/sh
 101 exit 101
 102 EOF
 103         chmod +x $rootfs/usr/sbin/policy-rc.d
 104
 105         rm -f $rootfs/etc/ssh/ssh_host_*key*
 106         mv $rootfs/etc/init/ssh.conf $rootfs/etc/init/ssh.conf.disabled
 107         DPKG_MAINTSCRIPT_PACKAGE=openssh DPKG_MAINTSCRIPT_NAME=postinst chroot $rootfs $LOCALSTATEDIR/lib/dpkg/info/openssh-server.postinst configure
 108         mv $rootfs/etc/init/ssh.conf.disabled $rootfs/etc/init/ssh.conf
 109
 110         sed -i "s/root@$(hostname)/root@$hostname/g" $rootfs/etc/ssh/ssh_host_*.pub
 111
 112         rm -f $rootfs/usr/sbin/policy-rc.d
 113     fi
 114
 115     return 0
 116 }
 117
 118 # finish setting up the user in the container by injecting ssh key and
 119 # adding sudo group membership.
 120 # passed-in user is either 'ubuntu' or the user to bind in from host.
 121 finalize_user()
 122 {
 123     user=$1
 124
 125     sudo_version=$(chroot $rootfs dpkg-query -W -f='${Version}' sudo)
 126
 127     if chroot $rootfs dpkg --compare-versions $sudo_version gt "1.8.3p1-1"; then
 128         groups="sudo"
 129     else
 130         groups="sudo admin"
 131     fi
 132
 133     for group in $groups; do
 134         chroot $rootfs groupadd --system $group >/dev/null 2>&1 || true
 135         chroot $rootfs adduser ${user} $group >/dev/null 2>&1 || true
 136     done
 137
 138     if [ -n "$auth_key" -a -f "$auth_key" ]; then
 139         u_path="/home/${user}/.ssh"
 140         root_u_path="$rootfs/$u_path"
 141         mkdir -p $root_u_path
 142         cp $auth_key "$root_u_path/authorized_keys"
 143         chroot $rootfs chown -R ${user}: "$u_path"
 144
 145         echo "Inserted SSH public key from $auth_key into /home/${user}/.ssh/authorized_keys"
 146     fi
 147     return 0
 148 }
 149
 150 # A function to try and autodetect squid-deb-proxy servers on the local network
 151 # if either the squid-deb-proxy-client package is installed on the host or
 152 # a parent container set the 50squid-deb-proxy-client file.
 153 squid_deb_proxy_autodetect()
 154 {
 155     local apt_discover=/usr/share/squid-deb-proxy-client/apt-avahi-discover
 156     local proxy_file=/etc/apt/apt.conf.d/50squid-deb-proxy-client
 157     squid_proxy_line=  # That's a global :/
 158
 159     # Maybe the host is aware of a squid-deb-proxy?
 160     if [ -f $apt_discover ]; then
 161         echo -n "Discovering squid-deb-proxy..."
 162         squid_proxy_line=$($apt_discover)
 163         if [ -n "$squid_proxy_line" ]; then
 164             echo "found squid-deb-proxy: $squid_proxy_line"
 165         else
 166             echo "no squid-deb-proxy found"
 167         fi
 168     fi
 169
 170     # Are we in a nested container, and the parent already knows of a proxy?
 171     if [ -f $proxy_file ]; then
 172         # Extract the squid URL from the file (whatever is between "")
 173         squid_proxy_line=`cat $proxy_file | sed "s/.*\"\(.*\)\".*/\1/"`
 174     fi
 175 }
 176
 177 #
 178 # Choose proxies for container
 179 # http_proxy will be used by debootstrap on the host.
 180 # APT_PROXY will be used to set /etc/apt/apt.conf.d/70proxy in the container.
 181 #
 182 choose_container_proxy()
 183 {
 184     local rootfs=$1
 185     local arch=$2
 186
 187     if [ -z "$HTTP_PROXY" ]; then
 188         HTTP_PROXY="none"
 189     fi
 190     case "$HTTP_PROXY" in
 191     none)
 192         squid_deb_proxy_autodetect
 193         if [ -n "$squid_proxy_line" ]; then
 194             APT_PROXY=$squid_proxy_line
 195             export http_proxy=$squid_proxy_line
 196         else
 197             APT_PROXY=
 198         fi
 199         ;;
 200     apt)
 201         RES=`apt-config shell APT_PROXY Acquire::http::Proxy`
 202         eval $RES
 203         [ -z "$APT_PROXY" ] || export http_proxy=$APT_PROXY
 204         ;;
 205     *)
 206         APT_PROXY=$HTTP_PROXY
 207         export http_proxy=$HTTP_PROXY
 208         ;;
 209     esac
 210 }
 211
 212 write_sourceslist()
 213 {
 214     # $1 => path to the rootfs
 215     # $2 => architecture we want to add
 216     # $3 => whether to use the multi-arch syntax or not
 217
 218     if [ -n "$APT_PROXY" ]; then
 219         mkdir -p $rootfs/etc/apt/apt.conf.d
 220         cat > $rootfs/etc/apt/apt.conf.d/70proxy << EOF
 221 Acquire::http::Proxy "$APT_PROXY" ;
 222 EOF
 223     fi
 224
 225     case $2 in
 226       amd64|i386)
 227             MIRROR=${MIRROR:-http://archive.ubuntu.com/ubuntu}
 228             SECURITY_MIRROR=${SECURITY_MIRROR:-http://security.ubuntu.com/ubuntu}
 229             ;;
 230       *)
 231             MIRROR=${MIRROR:-http://ports.ubuntu.com/ubuntu-ports}
 232             SECURITY_MIRROR=${SECURITY_MIRROR:-http://ports.ubuntu.com/ubuntu-ports}
 233             ;;
 234     esac
 235     if [ -n "$3" ]; then
 236         cat >> "$1/etc/apt/sources.list" << EOF
 237 deb [arch=$2] $MIRROR ${release} main restricted universe multiverse
 238 deb [arch=$2] $MIRROR ${release}-updates main restricted universe multiverse
 239 deb [arch=$2] $SECURITY_MIRROR ${release}-security main restricted universe multiverse
 240 EOF
 241     else
 242         cat >> "$1/etc/apt/sources.list" << EOF
 243 deb $MIRROR ${release} main restricted universe multiverse
 244 deb $MIRROR ${release}-updates main restricted universe multiverse
 245 deb $SECURITY_MIRROR ${release}-security main restricted universe multiverse
 246 EOF
 247     fi
 248 }
 249
 250 install_packages()
 251 {
 252     local rootfs="$1"
 253     shift
 254     local packages="$*"
 255     if [ -z $update ]
 256     then
 257         chroot $rootfs apt-get update
 258         update=true
 259     fi
 260     if [ -n "${packages}" ]
 261     then
 262         chroot $rootfs apt-get install --force-yes -y --no-install-recommends ${packages}
 263     fi
 264 }
 265
 266 cleanup()
 267 {
 268     rm -rf $cache/partial-$arch
 269     rm -rf $cache/rootfs-$arch
 270 }
 271
 272 suggest_flush()
 273 {
 274     echo "Container upgrade failed.  The container cache may be out of date,"
 275     echo "in which case flushing the cache (see -F in the help output) may help."
 276 }
 277
 278 download_ubuntu()
 279 {
 280     cache=$1
 281     arch=$2
 282     release=$3
 283
 284     packages_template=${packages_template:-"ssh,vim"}
 285
 286     # Try to guess a list of langpacks to install
 287     langpacks="language-pack-en"
 288
 289     if which dpkg >/dev/null 2>&1; then
 290         langpacks=`(echo $langpacks &&
 291                     dpkg -l | grep -E "^ii  language-pack-[a-z]* " |
 292                         cut -d ' ' -f3) | sort -u`
 293     fi
 294     packages_template="${packages_template},$(echo $langpacks | sed 's/ /,/g')"
 295
 296
 297     echo "Installing packages in template: ${packages_template}"
 298
 299     trap cleanup EXIT SIGHUP SIGINT SIGTERM
 300     # check the mini ubuntu was not already downloaded
 301     mkdir -p "$cache/partial-$arch"
 302     if [ $? -ne 0 ]; then
 303         echo "Failed to create '$cache/partial-$arch' directory"
 304         return 1
 305     fi
 306
 307     choose_container_proxy $cache/partial-$arch/ $arch
 308     # download a mini ubuntu into a cache
 309     echo "Downloading ubuntu $release minimal ..."
 310     if [ -n "$(which qemu-debootstrap)" ]; then
 311         qemu-debootstrap --verbose --components=main,universe --arch=$arch --include=${packages_template} $release $cache/partial-$arch $MIRROR
 312     else
 313         debootstrap --verbose --components=main,universe --arch=$arch --include=${packages_template} $release $cache/partial-$arch $MIRROR
 314     fi
 315
 316     if [ $? -ne 0 ]; then
 317         echo "Failed to download the rootfs, aborting."
 318             return 1
 319     fi
 320
 321     # Serge isn't sure whether we should avoid doing this when
 322     # $release == `distro-info -d`
 323     echo "Installing updates"
 324     > $cache/partial-$arch/etc/apt/sources.list
 325     write_sourceslist $cache/partial-$arch/ $arch
 326
 327     chroot "$1/partial-${arch}" apt-get update
 328     if [ $? -ne 0 ]; then
 329         echo "Failed to update the apt cache"
 330         return 1
 331     fi
 332     cat > "$1/partial-${arch}"/usr/sbin/policy-rc.d << EOF
 333 #!/bin/sh
 334 exit 101
 335 EOF
 336     chmod +x "$1/partial-${arch}"/usr/sbin/policy-rc.d
 337
 338     lxc-unshare -s MOUNT -- chroot "$1/partial-${arch}" apt-get dist-upgrade -y || { suggest_flush; false; }
 339     rm -f "$1/partial-${arch}"/usr/sbin/policy-rc.d
 340
 341     chroot "$1/partial-${arch}" apt-get clean
 342
 343     mv "$1/partial-$arch" "$1/rootfs-$arch"
 344     trap EXIT
 345     trap SIGINT
 346     trap SIGTERM
 347     trap SIGHUP
 348     echo "Download complete"
 349     return 0
 350 }
 351
 352 copy_ubuntu()
 353 {
 354     cache=$1
 355     arch=$2
 356     rootfs=$3
 357
 358     # make a local copy of the miniubuntu
 359     echo "Copying rootfs to $rootfs ..."
 360     mkdir -p $rootfs
 361     rsync -Ha $cache/rootfs-$arch/ $rootfs/ || return 1
 362     return 0
 363 }
 364
 365 install_ubuntu()
 366 {
 367     rootfs=$1
 368     release=$2
 369     flushcache=$3
 370     cache="$LOCALSTATEDIR/cache/lxc/$release"
 371     mkdir -p $LOCALSTATEDIR/lock/subsys/
 372
 373     (
 374         flock -x 9
 375         if [ $? -ne 0 ]; then
 376             echo "Cache repository is busy."
 377             return 1
 378         fi
 379
 380
 381         if [ $flushcache -eq 1 ]; then
 382             echo "Flushing cache..."
 383             rm -rf "$cache/partial-$arch"
 384             rm -rf "$cache/rootfs-$arch"
 385         fi
 386
 387         echo "Checking cache download in $cache/rootfs-$arch ... "
 388         if [ ! -e "$cache/rootfs-$arch" ]; then
 389             download_ubuntu $cache $arch $release
 390             if [ $? -ne 0 ]; then
 391                 echo "Failed to download 'ubuntu $release base'"
 392                 return 1
 393             fi
 394         fi
 395
 396         echo "Copy $cache/rootfs-$arch to $rootfs ... "
 397         copy_ubuntu $cache $arch $rootfs
 398         if [ $? -ne 0 ]; then
 399             echo "Failed to copy rootfs"
 400             return 1
 401         fi
 402
 403         return 0
 404
 405     ) 9>$LOCALSTATEDIR/lock/subsys/lxc-ubuntu$release
 406
 407     return $?
 408 }
 409
 410 copy_configuration()
 411 {
 412     path=$1
 413     rootfs=$2
 414     name=$3
 415     arch=$4
 416     release=$5
 417
 418     if [ $arch = "i386" ]; then
 419         arch="i686"
 420     fi
 421
 422     # if there is exactly one veth network entry, make sure it has an
 423     # associated hwaddr.
 424     nics=`grep -e '^lxc\.network\.type[ \t]*=[ \t]*veth' $path/config | wc -l`
 425     if [ $nics -eq 1 ]; then
 426         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
 427     fi
 428
 429     # Generate the configuration file
 430     ## Create the fstab (empty by default)
 431     touch $path/fstab
 432
 433     ## Relocate all the network config entries
 434     sed -i -e "/lxc.network/{w ${path}/config-network" -e "d}" $path/config
 435
 436     ## Relocate any other config entries
 437     sed -i -e "/lxc./{w ${path}/config-auto" -e "d}" $path/config
 438
 439     ## Add all the includes
 440     echo "" >> $path/config
 441     echo "# Common configuration" >> $path/config
 442     if [ -e "${LXC_TEMPLATE_CONFIG}/ubuntu.common.conf" ]; then
 443         echo "lxc.include = ${LXC_TEMPLATE_CONFIG}/ubuntu.common.conf" >> $path/config
 444     fi
 445     if [ -e "${LXC_TEMPLATE_CONFIG}/ubuntu.${release}.conf" ]; then
 446         echo "lxc.include = ${LXC_TEMPLATE_CONFIG}/ubuntu.${release}.conf" >> $path/config
 447     fi
 448
 449     ## Add the container-specific config
 450     echo "" >> $path/config
 451     echo "# Container specific configuration" >> $path/config
 452     [ -e "$path/config-auto" ] && cat $path/config-auto >> $path/config && rm $path/config-auto
 453     grep -q "^lxc.rootfs" $path/config 2>/dev/null || echo "lxc.rootfs = $rootfs" >> $path/config
 454     cat <<EOF >> $path/config
 455 lxc.mount = $path/fstab
 456 lxc.utsname = $name
 457 lxc.arch = $arch
 458 EOF
 459
 460     ## Re-add the previously removed network config
 461     echo "" >> $path/config
 462     echo "# Network configuration" >> $path/config
 463     cat $path/config-network >> $path/config
 464     rm $path/config-network
 465
 466     if [ $? -ne 0 ]; then
 467         echo "Failed to add configuration"
 468         return 1
 469     fi
 470
 471     return 0
 472 }
 473
 474 post_process()
 475 {
 476     rootfs=$1
 477     release=$2
 478     packages=$3
 479
 480     # Disable service startup
 481     cat > $rootfs/usr/sbin/policy-rc.d << EOF
 482 #!/bin/sh
 483 exit 101
 484 EOF
 485     chmod +x $rootfs/usr/sbin/policy-rc.d
 486
 487     if [ ! -f $rootfs/etc/init/container-detect.conf ]; then
 488         # Make sure we have a working resolv.conf
 489         cresolvonf="${rootfs}/etc/resolv.conf"
 490         mv $cresolvonf ${cresolvonf}.lxcbak
 491         cat /etc/resolv.conf > ${cresolvonf}
 492
 493         # for lucid, if not trimming, then add the ubuntu-virt
 494         # ppa and install lxcguest
 495         if [ $release = "lucid" ]; then
 496             chroot $rootfs apt-get update
 497             install_packages $rootfs "python-software-properties"
 498             chroot $rootfs add-apt-repository ppa:ubuntu-virt/ppa
 499         fi
 500
 501         chroot $rootfs apt-get update
 502         chroot $rootfs apt-get install --force-yes -y lxcguest
 503
 504         # Restore old resolv.conf
 505         rm -f ${cresolvonf}
 506         mv ${cresolvonf}.lxcbak ${cresolvonf}
 507     fi
 508
 509     # If the container isn't running a native architecture, setup multiarch
 510     if [ -x "$(ls -1 ${rootfs}/usr/bin/qemu-*-static 2>/dev/null)" ]; then
 511         dpkg_version=$(chroot $rootfs dpkg-query -W -f='${Version}' dpkg)
 512         if chroot $rootfs dpkg --compare-versions $dpkg_version ge "1.16.2"; then
 513             chroot $rootfs dpkg --add-architecture ${hostarch}
 514         else
 515             mkdir -p ${rootfs}/etc/dpkg/dpkg.cfg.d
 516             echo "foreign-architecture ${hostarch}" > ${rootfs}/etc/dpkg/dpkg.cfg.d/lxc-multiarch
 517         fi
 518
 519         # Save existing value of MIRROR and SECURITY_MIRROR
 520         DEFAULT_MIRROR=$MIRROR
 521         DEFAULT_SECURITY_MIRROR=$SECURITY_MIRROR
 522
 523         # Write a new sources.list containing both native and multiarch entries
 524         > ${rootfs}/etc/apt/sources.list
 525         write_sourceslist $rootfs $arch "native"
 526
 527         MIRROR=$DEFAULT_MIRROR
 528         SECURITY_MIRROR=$DEFAULT_SECURITY_MIRROR
 529         write_sourceslist $rootfs $hostarch "multiarch"
 530
 531         # Finally update the lists and install upstart using the host architecture
 532         HOST_PACKAGES="upstart:${hostarch} mountall:${hostarch} isc-dhcp-client:${hostarch}"
 533         chroot $rootfs apt-get update
 534         if chroot $rootfs dpkg -l iproute2 | grep -q ^ii; then
 535             HOST_PACKAGES="$HOST_PACKAGES iproute2:${hostarch}"
 536         else
 537             HOST_PACKAGES="$HOST_PACKAGES iproute:${hostarch}"
 538         fi
 539         install_packages $rootfs $HOST_PACKAGES
 540     fi
 541
 542     # Install Packages in container
 543     if [ -n "$packages" ]
 544     then
 545         local packages="`echo $packages | sed 's/,/ /g'`"
 546         echo "Installing packages: ${packages}"
 547         install_packages $rootfs $packages
 548     fi
 549
 550     # Set initial timezone as on host
 551     if [ -f /etc/timezone ]; then
 552         cat /etc/timezone > $rootfs/etc/timezone
 553         chroot $rootfs dpkg-reconfigure -f noninteractive tzdata
 554     elif [ -f /etc/sysconfig/clock ]; then
 555         . /etc/sysconfig/clock
 556         echo $ZONE > $rootfs/etc/timezone
 557         chroot $rootfs dpkg-reconfigure -f noninteractive tzdata
 558     else
 559         echo "Timezone in container is not configured. Adjust it manually."
 560     fi
 561
 562     # rmdir /dev/shm for containers that have /run/shm
 563     # I'm afraid of doing rm -rf $rootfs/dev/shm, in case it did
 564     # get bind mounted to the host's /run/shm.  So try to rmdir
 565     # it, and in case that fails move it out of the way.
 566     # NOTE: This can only be removed once 12.04 goes out of support
 567     if [ ! -L $rootfs/dev/shm ] && [ -d $rootfs/run/shm ] && [ -e $rootfs/dev/shm ]; then
 568         rmdir $rootfs/dev/shm 2>/dev/null || mv $rootfs/dev/shm $rootfs/dev/shm.bak
 569         ln -s /run/shm $rootfs/dev/shm
 570     fi
 571
 572     # Re-enable service startup
 573     rm $rootfs/usr/sbin/policy-rc.d
 574 }
 575
 576 do_bindhome()
 577 {
 578     rootfs=$1
 579     user=$2
 580
 581     # copy /etc/passwd, /etc/shadow, and /etc/group entries into container
 582     pwd=`getent passwd $user` || { echo "Failed to copy password entry for $user"; false; }
 583     echo $pwd >> $rootfs/etc/passwd
 584
 585     # make sure user's shell exists in the container
 586     shell=`echo $pwd | cut -d: -f 7`
 587     if [ ! -x $rootfs/$shell ]; then
 588         echo "shell $shell for user $user was not found in the container."
 589         pkg=`dpkg -S $(readlink -m $shell) | cut -d ':' -f1`
 590         echo "Installing $pkg"
 591         install_packages $rootfs $pkg
 592     fi
 593
 594     shad=`getent shadow $user`
 595     echo "$shad" >> $rootfs/etc/shadow
 596
 597     # bind-mount the user's path into the container's /home
 598     h=`getent passwd $user | cut -d: -f 6`
 599     mkdir -p $rootfs/$h
 600
 601     # use relative path in container
 602     h2=${h#/}
 603     while [ ${h2:0:1} = "/" ]; do
 604         h2=${h2#/}
 605     done
 606     echo "$h $h2 none bind 0 0" >> $path/fstab
 607
 608     # Make sure the group exists in container
 609     grp=`echo $pwd | cut -d: -f 4`  # group number for $user
 610     grpe=`getent group $grp` || return 0  # if host doesn't define grp, ignore in container
 611     chroot $rootfs getent group "$grpe" || echo "$grpe" >> $rootfs/etc/group
 612 }
 613
 614 usage()
 615 {
 616     cat <<EOF
 617 $1 -h|--help [-a|--arch] [-b|--bindhome <user>] [-d|--debug]
 618    [-F | --flush-cache] [-r|--release <release>] [ -S | --auth-key <keyfile>]
 619    [--rootfs <rootfs>] [--packages <packages>] [-u|--user <user>] [--password <password>]
 620 release: the ubuntu release (e.g. precise): defaults to host release on ubuntu, otherwise uses latest LTS
 621 bindhome: bind <user>'s home into the container
 622           The ubuntu user will not be created, and <user> will have
 623           sudo access.
 624 arch: the container architecture (e.g. amd64): defaults to host arch
 625 auth-key: SSH Public key file to inject into container
 626 packages: list of packages to add comma separated
 627 EOF
 628     return 0
 629 }
 630
 631 options=$(getopt -o a:b:hp:r:n:FS:du: -l arch:,bindhome:,help,path:,release:,name:,flush-cache,auth-key:,debug,rootfs:,packages:,user:,password:,mirror:,security-mirror: -- "$@")
 632 if [ $? -ne 0 ]; then
 633     usage $(basename $0)
 634     exit 1
 635 fi
 636 eval set -- "$options"
 637
 638 release=precise # Default to the last Ubuntu LTS release for non-Ubuntu systems
 639 if [ -f /etc/lsb-release ]; then
 640     . /etc/lsb-release
 641     if [ "$DISTRIB_ID" = "Ubuntu" ]; then
 642         release=$DISTRIB_CODENAME
 643     fi
 644 fi
 645
 646 bindhome=
 647
 648 # Code taken from debootstrap
 649 if [ -x /usr/bin/dpkg ] && /usr/bin/dpkg --print-architecture >/dev/null 2>&1; then
 650     arch=`/usr/bin/dpkg --print-architecture`
 651 elif which udpkg >/dev/null 2>&1 && udpkg --print-architecture >/dev/null 2>&1; then
 652     arch=`/usr/bin/udpkg --print-architecture`
 653 else
 654     arch=$(uname -m)
 655     if [ "$arch" = "i686" ]; then
 656         arch="i386"
 657     elif [ "$arch" = "x86_64" ]; then
 658         arch="amd64"
 659     elif [ "$arch" = "armv7l" ]; then
 660         arch="armhf"
 661     fi
 662 fi
 663
 664 debug=0
 665 hostarch=$arch
 666 flushcache=0
 667 packages=""
 668 user="ubuntu"
 669 password="ubuntu"
 670 while true
 671 do
 672     case "$1" in
 673     -h|--help)      usage $0 && exit 0;;
 674     --rootfs)       rootfs=$2; shift 2;;
 675     -p|--path)      path=$2; shift 2;;
 676     -n|--name)      name=$2; shift 2;;
 677     -u|--user)      user=$2; shift 2;;
 678     --password)     password=$2; shift 2;;
 679     -F|--flush-cache) flushcache=1; shift 1;;
 680     -r|--release)   release=$2; shift 2;;
 681     --packages)     packages=$2; shift 2;;
 682     -b|--bindhome)  bindhome=$2; shift 2;;
 683     -a|--arch)      arch=$2; shift 2;;
 684     -S|--auth-key)  auth_key=$2; shift 2;;
 685     -d|--debug)     debug=1; shift 1;;
 686     --mirror)       MIRROR=$2; shift 2;;
 687     --security-mirror) SECURITY_MIRROR=$2; shift 2;;
 688     --)             shift 1; break ;;
 689         *)              break ;;
 690     esac
 691 done
 692
 693 if [ $debug -eq 1 ]; then
 694     set -x
 695 fi
 696
 697 if [ -n "$bindhome" ]; then
 698     pwd=`getent passwd $bindhome`
 699     if [ $? -ne 0 ]; then
 700         echo "Error: no password entry found for $bindhome"
 701         exit 1
 702     fi
 703 fi
 704
 705
 706 if [ "$arch" = "i686" ]; then
 707     arch=i386
 708 fi
 709
 710 if [ $hostarch = "i386" -a $arch = "amd64" ]; then
 711     echo "can't create $arch container on $hostarch"
 712     exit 1
 713 fi
 714
 715 if [ $hostarch = "armhf" -o $hostarch = "armel" ] && \
 716    [ $arch != "armhf" -a $arch != "armel" ]; then
 717     echo "can't create $arch container on $hostarch"
 718     exit 1
 719 fi
 720
 721 if [ $hostarch = "powerpc" -a $arch != "powerpc" ]; then
 722     echo "can't create $arch container on $hostarch"
 723     exit 1
 724 fi
 725
 726 which debootstrap >/dev/null 2>&1 || { echo "'debootstrap' command is missing" >&2; false; }
 727
 728 if [ -z "$path" ]; then
 729     echo "'path' parameter is required"
 730     exit 1
 731 fi
 732
 733 if [ "$(id -u)" != "0" ]; then
 734     echo "This script should be run as 'root'"
 735     exit 1
 736 fi
 737
 738 # detect rootfs
 739 config="$path/config"
 740 # if $rootfs exists here, it was passed in with --rootfs
 741 if [ -z "$rootfs" ]; then
 742     if grep -q '^lxc.rootfs' $config 2>/dev/null ; then
 743         rootfs=$(awk -F= '/^lxc.rootfs =/{ print $2 }' $config)
 744     else
 745         rootfs=$path/rootfs
 746     fi
 747 fi
 748
 749 install_ubuntu $rootfs $release $flushcache
 750 if [ $? -ne 0 ]; then
 751     echo "failed to install ubuntu $release"
 752     exit 1
 753 fi
 754
 755 configure_ubuntu $rootfs $name $release $user $password
 756 if [ $? -ne 0 ]; then
 757     echo "failed to configure ubuntu $release for a container"
 758     exit 1
 759 fi
 760
 761 copy_configuration $path $rootfs $name $arch $release
 762 if [ $? -ne 0 ]; then
 763     echo "failed write configuration file"
 764     exit 1
 765 fi
 766
 767 post_process $rootfs $release $trim_container $packages
 768
 769 if [ -n "$bindhome" ]; then
 770     do_bindhome $rootfs $bindhome
 771     finalize_user $bindhome
 772 else
 773     finalize_user $user
 774 fi
 775
 776 echo ""
 777 echo "##"
 778 if [ -n "$bindhome" ]; then
 779     echo "# Log in as user $bindhome"
 780 else
 781     echo "# The default user is '$user' with password '$password'!"
 782     echo "# Use the 'sudo' command to run tasks as root in the container."
 783 fi
 784 echo "##"
 785 echo ""