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 # Detect use under userns (unsupported)
  28 for arg in "$@"; do
  29     [ "$arg" = "--" ] && break
  30     if [ "$arg" = "--mapped-uid" -o "$arg" = "--mapped-gid" ]; then
  31         echo "This template can't be used for unprivileged containers." 1>&2
  32         echo "You may want to try the \"download\" template instead." 1>&2
  33         exit 1
  34     fi
  35 done
  36
  37 # Make sure the usual locations are in PATH
  38 export PATH=$PATH:/usr/sbin:/usr/bin:/sbin:/bin
  39
  40 set -e
  41
  42 LOCALSTATEDIR="@LOCALSTATEDIR@"
  43 LXC_TEMPLATE_CONFIG="@LXCTEMPLATECONFIG@"
  44 # Allows the lxc-cache directory to be set by environment variable
  45 LXC_CACHE_PATH=${LXC_CACHE_PATH:-"$LOCALSTATEDIR/cache/lxc"}
  46
  47 if [ -r /etc/default/lxc ]; then
  48     . /etc/default/lxc
  49 fi
  50
  51 # Check if given path is in a btrfs partition
  52 is_btrfs()
  53 {
  54     [ -e $1 -a $(stat -f -c '%T' $1) = "btrfs" ]
  55 }
  56
  57 # Check if given path is the root of a btrfs subvolume
  58 is_btrfs_subvolume()
  59 {
  60     [ -d $1 -a $(stat -f -c '%T' $1) = "btrfs" -a $(stat -c '%i' $1) -eq 256 ]
  61 }
  62
  63 try_mksubvolume()
  64 {
  65     path=$1
  66     [ -d $path ] && return 0
  67     mkdir -p $(dirname $path)
  68     if which btrfs >/dev/null 2>&1 && is_btrfs $(dirname $path); then
  69         btrfs subvolume create $path
  70     else
  71         mkdir -p $path
  72     fi
  73 }
  74
  75 try_rmsubvolume()
  76 {
  77     path=$1
  78     [ -d $path ] || return 0
  79     if which btrfs >/dev/null 2>&1 && is_btrfs_subvolume $path; then
  80         btrfs subvolume delete $path
  81     else
  82         rm -rf $path
  83     fi
  84 }
  85
  86 configure_ubuntu()
  87 {
  88     rootfs=$1
  89     hostname=$2
  90     release=$3
  91     user=$4
  92     password=$5
  93
  94     # configure the network using the dhcp
  95     cat <<EOF > $rootfs/etc/network/interfaces
  96 # This file describes the network interfaces available on your system
  97 # and how to activate them. For more information, see interfaces(5).
  98
  99 # The loopback network interface
 100 auto lo
 101 iface lo inet loopback
 102
 103 auto eth0
 104 iface eth0 inet dhcp
 105 EOF
 106
 107     # set the hostname
 108     cat <<EOF > $rootfs/etc/hostname
 109 $hostname
 110 EOF
 111     # set minimal hosts
 112     cat <<EOF > $rootfs/etc/hosts
 113 127.0.0.1   localhost
 114 127.0.1.1   $hostname
 115
 116 # The following lines are desirable for IPv6 capable hosts
 117 ::1     ip6-localhost ip6-loopback
 118 fe00::0 ip6-localnet
 119 ff00::0 ip6-mcastprefix
 120 ff02::1 ip6-allnodes
 121 ff02::2 ip6-allrouters
 122 EOF
 123
 124     if [ ! -f $rootfs/etc/init/container-detect.conf ]; then
 125         # suppress log level output for udev
 126         sed -i "s/=\"err\"/=0/" $rootfs/etc/udev/udev.conf
 127
 128         # remove jobs for consoles 5 and 6 since we only create 4 consoles in
 129         # this template
 130         rm -f $rootfs/etc/init/tty{5,6}.conf
 131     fi
 132
 133     if [ -z "$bindhome" ]; then
 134         chroot $rootfs useradd --create-home -s /bin/bash $user
 135         echo "$user:$password" | chroot $rootfs chpasswd
 136     fi
 137
 138     # make sure we have the current locale defined in the container
 139     if [ -z "$LANG" ] || echo $LANG | grep -E -q "^C(\..+)*$"; then
 140         chroot $rootfs locale-gen en_US.UTF-8 || true
 141         chroot $rootfs update-locale LANG=en_US.UTF-8 || true
 142     else
 143         chroot $rootfs locale-gen $LANG || true
 144         chroot $rootfs update-locale LANG=$LANG || true
 145     fi
 146
 147     # generate new SSH keys
 148     if [ -x $rootfs/var/lib/dpkg/info/openssh-server.postinst ]; then
 149         cat > $rootfs/usr/sbin/policy-rc.d << EOF
 150 #!/bin/sh
 151 exit 101
 152 EOF
 153         chmod +x $rootfs/usr/sbin/policy-rc.d
 154
 155         rm -f $rootfs/etc/ssh/ssh_host_*key*
 156         mv $rootfs/etc/init/ssh.conf $rootfs/etc/init/ssh.conf.disabled
 157         DPKG_MAINTSCRIPT_PACKAGE=openssh DPKG_MAINTSCRIPT_NAME=postinst chroot $rootfs /var/lib/dpkg/info/openssh-server.postinst configure
 158         mv $rootfs/etc/init/ssh.conf.disabled $rootfs/etc/init/ssh.conf
 159
 160         sed -i "s/root@$(hostname)/root@$hostname/g" $rootfs/etc/ssh/ssh_host_*.pub
 161
 162         rm -f $rootfs/usr/sbin/policy-rc.d
 163     fi
 164
 165     return 0
 166 }
 167
 168 # finish setting up the user in the container by injecting ssh key and
 169 # adding sudo group membership.
 170 # passed-in user is either 'ubuntu' or the user to bind in from host.
 171 finalize_user()
 172 {
 173     user=$1
 174
 175     sudo_version=$(chroot $rootfs dpkg-query -W -f='${Version}' sudo)
 176
 177     if chroot $rootfs dpkg --compare-versions $sudo_version gt "1.8.3p1-1"; then
 178         groups="sudo"
 179     else
 180         groups="sudo admin"
 181     fi
 182
 183     for group in $groups; do
 184         chroot $rootfs groupadd --system $group >/dev/null 2>&1 || true
 185         chroot $rootfs adduser ${user} $group >/dev/null 2>&1 || true
 186     done
 187
 188     if [ -n "$auth_key" -a -f "$auth_key" ]; then
 189         u_path="/home/${user}/.ssh"
 190         root_u_path="$rootfs/$u_path"
 191         mkdir -p $root_u_path
 192         cp $auth_key "$root_u_path/authorized_keys"
 193         chroot $rootfs chown -R ${user}: "$u_path"
 194
 195         echo "Inserted SSH public key from $auth_key into /home/${user}/.ssh/authorized_keys"
 196     fi
 197     return 0
 198 }
 199
 200 # A function to try and autodetect squid-deb-proxy servers on the local network
 201 # if either the squid-deb-proxy-client package is installed on the host or
 202 # a parent container set the 50squid-deb-proxy-client file.
 203 squid_deb_proxy_autodetect()
 204 {
 205     local apt_discover=/usr/share/squid-deb-proxy-client/apt-avahi-discover
 206     local proxy_file=/etc/apt/apt.conf.d/50squid-deb-proxy-client
 207     squid_proxy_line=  # That's a global :/
 208
 209     # Maybe the host is aware of a squid-deb-proxy?
 210     if [ -f $apt_discover ]; then
 211         echo -n "Discovering squid-deb-proxy..."
 212         squid_proxy_line=$($apt_discover)
 213         if [ -n "$squid_proxy_line" ]; then
 214             echo "found squid-deb-proxy: $squid_proxy_line"
 215         else
 216             echo "no squid-deb-proxy found"
 217         fi
 218     fi
 219
 220     # Are we in a nested container, and the parent already knows of a proxy?
 221     if [ -f $proxy_file ]; then
 222         # Extract the squid URL from the file (whatever is between "")
 223         squid_proxy_line=`cat $proxy_file | sed "s/.*\"\(.*\)\".*/\1/"`
 224     fi
 225 }
 226
 227 #
 228 # Choose proxies for container
 229 # http_proxy will be used by debootstrap on the host.
 230 # APT_PROXY will be used to set /etc/apt/apt.conf.d/70proxy in the container.
 231 #
 232 choose_container_proxy()
 233 {
 234     local rootfs=$1
 235     local arch=$2
 236
 237     if [ -z "$HTTP_PROXY" ]; then
 238         HTTP_PROXY="none"
 239     fi
 240     case "$HTTP_PROXY" in
 241     none)
 242         squid_deb_proxy_autodetect
 243         if [ -n "$squid_proxy_line" ]; then
 244             APT_PROXY=$squid_proxy_line
 245             export http_proxy=$squid_proxy_line
 246         else
 247             APT_PROXY=
 248         fi
 249         ;;
 250     apt)
 251         RES=`apt-config shell APT_PROXY Acquire::http::Proxy`
 252         eval $RES
 253         [ -z "$APT_PROXY" ] || export http_proxy=$APT_PROXY
 254         ;;
 255     *)
 256         APT_PROXY=$HTTP_PROXY
 257         export http_proxy=$HTTP_PROXY
 258         ;;
 259     esac
 260 }
 261
 262 write_sourceslist()
 263 {
 264     # $1 => path to the partial cache or the rootfs
 265     # $2 => architecture we want to add
 266     # $3 => whether to use the multi-arch syntax or not
 267
 268     if [ -n "$APT_PROXY" ]; then
 269         mkdir -p $1/etc/apt/apt.conf.d
 270         cat > $1/etc/apt/apt.conf.d/70proxy << EOF
 271 Acquire::http::Proxy "$APT_PROXY" ;
 272 EOF
 273     fi
 274
 275     case $2 in
 276       amd64|i386)
 277             MIRROR=${MIRROR:-http://archive.ubuntu.com/ubuntu}
 278             SECURITY_MIRROR=${SECURITY_MIRROR:-http://security.ubuntu.com/ubuntu}
 279             ;;
 280       *)
 281             MIRROR=${MIRROR:-http://ports.ubuntu.com/ubuntu-ports}
 282             SECURITY_MIRROR=${SECURITY_MIRROR:-http://ports.ubuntu.com/ubuntu-ports}
 283             ;;
 284     esac
 285     if [ -n "$3" ]; then
 286         cat >> "$1/etc/apt/sources.list" << EOF
 287 deb [arch=$2] $MIRROR ${release} main restricted universe multiverse
 288 deb [arch=$2] $MIRROR ${release}-updates main restricted universe multiverse
 289 deb [arch=$2] $SECURITY_MIRROR ${release}-security main restricted universe multiverse
 290 EOF
 291     else
 292         cat >> "$1/etc/apt/sources.list" << EOF
 293 deb $MIRROR ${release} main restricted universe multiverse
 294 deb $MIRROR ${release}-updates main restricted universe multiverse
 295 deb $SECURITY_MIRROR ${release}-security main restricted universe multiverse
 296 EOF
 297     fi
 298 }
 299
 300 install_packages()
 301 {
 302     local rootfs="$1"
 303     shift
 304     local packages="$*"
 305     if [ -z $update ]
 306     then
 307         chroot $rootfs apt-get update
 308         update=true
 309     fi
 310     if [ -n "${packages}" ]
 311     then
 312         chroot $rootfs apt-get install --force-yes -y --no-install-recommends ${packages}
 313     fi
 314 }
 315
 316 cleanup()
 317 {
 318     try_rmsubvolume $cache/partial-$arch
 319     try_rmsubvolume $cache/rootfs-$arch
 320 }
 321
 322 suggest_flush()
 323 {
 324     echo "Container upgrade failed.  The container cache may be out of date,"
 325     echo "in which case flushing the cache (see -F in the help output) may help."
 326 }
 327
 328 download_ubuntu()
 329 {
 330     cache=$1
 331     arch=$2
 332     release=$3
 333
 334     case $2 in
 335       amd64|i386)
 336             MIRROR=${MIRROR:-http://archive.ubuntu.com/ubuntu}
 337             SECURITY_MIRROR=${SECURITY_MIRROR:-http://security.ubuntu.com/ubuntu}
 338             ;;
 339       *)
 340             MIRROR=${MIRROR:-http://ports.ubuntu.com/ubuntu-ports}
 341             SECURITY_MIRROR=${SECURITY_MIRROR:-http://ports.ubuntu.com/ubuntu-ports}
 342             ;;
 343     esac
 344
 345     packages_template=${packages_template:-"apt-transport-https,ssh,vim"}
 346     debootstrap_parameters=
 347
 348     # Try to guess a list of langpacks to install
 349     langpacks="language-pack-en"
 350
 351     if which dpkg >/dev/null 2>&1; then
 352         langpacks=`(echo $langpacks &&
 353                     dpkg -l | grep -E "^ii  language-pack-[a-z]* " |
 354                         cut -d ' ' -f3) | sort -u`
 355     fi
 356     packages_template="${packages_template},$(echo $langpacks | sed 's/ /,/g')"
 357
 358     if [ -n "$variant" ]; then
 359         debootstrap_parameters="$debootstrap_parameters --variant=$variant"
 360     fi
 361     if [ "$variant" = 'minbase' ]; then
 362         packages_template="${packages_template},sudo,ifupdown,isc-dhcp-client"
 363     fi
 364
 365     echo "Installing packages in template: ${packages_template}"
 366
 367     trap cleanup EXIT SIGHUP SIGINT SIGTERM
 368     # check the mini ubuntu was not already downloaded
 369     try_mksubvolume "$cache/partial-$arch"
 370     if [ $? -ne 0 ]; then
 371         echo "Failed to create '$cache/partial-$arch' directory"
 372         return 1
 373     fi
 374
 375     choose_container_proxy $cache/partial-$arch/ $arch
 376     # download a mini ubuntu into a cache
 377     echo "Downloading ubuntu $release minimal ..."
 378     if [ -n "$(which qemu-debootstrap)" ]; then
 379         qemu-debootstrap --verbose $debootstrap_parameters --components=main,universe --arch=$arch --include=${packages_template} $release $cache/partial-$arch $MIRROR
 380     else
 381         debootstrap --verbose $debootstrap_parameters --components=main,universe --arch=$arch --include=${packages_template} $release $cache/partial-$arch $MIRROR
 382     fi
 383
 384     if [ $? -ne 0 ]; then
 385         echo "Failed to download the rootfs, aborting."
 386             return 1
 387     fi
 388
 389     # Serge isn't sure whether we should avoid doing this when
 390     # $release == `distro-info -d`
 391     echo "Installing updates"
 392     > $cache/partial-$arch/etc/apt/sources.list
 393     write_sourceslist $cache/partial-$arch/ $arch
 394
 395     chroot "$1/partial-${arch}" apt-get update
 396     if [ $? -ne 0 ]; then
 397         echo "Failed to update the apt cache"
 398         return 1
 399     fi
 400     cat > "$1/partial-${arch}"/usr/sbin/policy-rc.d << EOF
 401 #!/bin/sh
 402 exit 101
 403 EOF
 404     chmod +x "$1/partial-${arch}"/usr/sbin/policy-rc.d
 405
 406     (
 407         cat << EOF
 408         mount -t proc proc "${1}/partial-${arch}/proc"
 409         chroot "${1}/partial-${arch}" apt-get dist-upgrade -y
 410 EOF
 411     ) | lxc-unshare -s MOUNT -- sh -eu || (suggest_flush; false)
 412
 413     rm -f "$1/partial-${arch}"/usr/sbin/policy-rc.d
 414
 415     chroot "$1/partial-${arch}" apt-get clean
 416
 417     mv "$1/partial-$arch" "$1/rootfs-$arch"
 418     trap EXIT
 419     trap SIGINT
 420     trap SIGTERM
 421     trap SIGHUP
 422     echo "Download complete"
 423     return 0
 424 }
 425
 426 copy_ubuntu()
 427 {
 428     cache=$1
 429     arch=$2
 430     rootfs=$3
 431
 432     # make a local copy of the miniubuntu
 433     echo "Copying rootfs to $rootfs ..."
 434     try_mksubvolume $rootfs
 435     if which btrfs >/dev/null 2>&1 && is_btrfs_subvolume $cache/rootfs-$arch && is_btrfs_subvolume $rootfs; then
 436       realrootfs=$(dirname $config)/rootfs
 437       [ "$rootfs" = "$realrootfs" ] || umount $rootfs || return 1
 438       btrfs subvolume delete $realrootfs || return 1
 439       btrfs subvolume snapshot $cache/rootfs-$arch $realrootfs || return 1
 440       [ "$rootfs" = "$realrootfs" ] || mount --bind $realrootfs $rootfs || return 1
 441     else
 442       rsync -Ha $cache/rootfs-$arch/ $rootfs/ || return 1
 443     fi
 444     return 0
 445 }
 446
 447 install_ubuntu()
 448 {
 449     rootfs=$1
 450     release=$2
 451     flushcache=$3
 452     cache="$4/$release"
 453     mkdir -p $LOCALSTATEDIR/lock/subsys/
 454
 455     (
 456         flock -x 9
 457         if [ $? -ne 0 ]; then
 458             echo "Cache repository is busy."
 459             return 1
 460         fi
 461
 462
 463         if [ $flushcache -eq 1 ]; then
 464             echo "Flushing cache..."
 465             try_rmsubvolume $cache/partial-$arch
 466             try_rmsubvolume $cache/rootfs-$arch
 467         fi
 468
 469         echo "Checking cache download in $cache/rootfs-$arch ... "
 470         if [ ! -e "$cache/rootfs-$arch" ]; then
 471             download_ubuntu $cache $arch $release
 472             if [ $? -ne 0 ]; then
 473                 echo "Failed to download 'ubuntu $release base'"
 474                 return 1
 475             fi
 476         fi
 477
 478         echo "Copy $cache/rootfs-$arch to $rootfs ... "
 479         copy_ubuntu $cache $arch $rootfs
 480         if [ $? -ne 0 ]; then
 481             echo "Failed to copy rootfs"
 482             return 1
 483         fi
 484
 485         return 0
 486
 487     ) 9>$LOCALSTATEDIR/lock/subsys/lxc-ubuntu$release
 488
 489     return $?
 490 }
 491
 492 copy_configuration()
 493 {
 494     path=$1
 495     rootfs=$2
 496     name=$3
 497     arch=$4
 498     release=$5
 499
 500     if [ $arch = "i386" ]; then
 501         arch="i686"
 502     fi
 503
 504     # if there is exactly one veth network entry, make sure it has an
 505     # associated hwaddr.
 506     nics=`grep -e '^lxc\.network\.type[ \t]*=[ \t]*veth' $path/config | wc -l`
 507     if [ $nics -eq 1 ]; then
 508         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
 509     fi
 510
 511     # Generate the configuration file
 512     ## Relocate all the network config entries
 513     sed -i -e "/lxc.network/{w ${path}/config-network" -e "d}" $path/config
 514
 515     ## Relocate any other config entries
 516     sed -i -e "/lxc./{w ${path}/config-auto" -e "d}" $path/config
 517
 518     ## Add all the includes
 519     echo "" >> $path/config
 520     echo "# Common configuration" >> $path/config
 521     if [ -e "${LXC_TEMPLATE_CONFIG}/ubuntu.common.conf" ]; then
 522         echo "lxc.include = ${LXC_TEMPLATE_CONFIG}/ubuntu.common.conf" >> $path/config
 523     fi
 524     if [ -e "${LXC_TEMPLATE_CONFIG}/ubuntu.${release}.conf" ]; then
 525         echo "lxc.include = ${LXC_TEMPLATE_CONFIG}/ubuntu.${release}.conf" >> $path/config
 526     fi
 527
 528     ## Add the container-specific config
 529     echo "" >> $path/config
 530     echo "# Container specific configuration" >> $path/config
 531     [ -e "$path/config-auto" ] && cat $path/config-auto >> $path/config && rm $path/config-auto
 532     grep -q "^lxc.rootfs" $path/config 2>/dev/null || echo "lxc.rootfs = $rootfs" >> $path/config
 533     cat <<EOF >> $path/config
 534 lxc.utsname = $name
 535 lxc.arch = $arch
 536 EOF
 537
 538     ## Re-add the previously removed network config
 539     echo "" >> $path/config
 540     echo "# Network configuration" >> $path/config
 541     cat $path/config-network >> $path/config
 542     rm $path/config-network
 543
 544     if [ $? -ne 0 ]; then
 545         echo "Failed to add configuration"
 546         return 1
 547     fi
 548
 549     return 0
 550 }
 551
 552 post_process()
 553 {
 554     rootfs=$1
 555     release=$2
 556     packages=$3
 557
 558     # Disable service startup
 559     cat > $rootfs/usr/sbin/policy-rc.d << EOF
 560 #!/bin/sh
 561 exit 101
 562 EOF
 563     chmod +x $rootfs/usr/sbin/policy-rc.d
 564
 565     # If the container isn't running a native architecture, setup multiarch
 566     if [ -x "$(ls -1 ${rootfs}/usr/bin/qemu-*-static 2>/dev/null)" ]; then
 567         dpkg_version=$(chroot $rootfs dpkg-query -W -f='${Version}' dpkg)
 568         if chroot $rootfs dpkg --compare-versions $dpkg_version ge "1.16.2"; then
 569             chroot $rootfs dpkg --add-architecture ${hostarch}
 570         else
 571             mkdir -p ${rootfs}/etc/dpkg/dpkg.cfg.d
 572             echo "foreign-architecture ${hostarch}" > ${rootfs}/etc/dpkg/dpkg.cfg.d/lxc-multiarch
 573         fi
 574
 575         # Save existing value of MIRROR and SECURITY_MIRROR
 576         DEFAULT_MIRROR=$MIRROR
 577         DEFAULT_SECURITY_MIRROR=$SECURITY_MIRROR
 578
 579         # Write a new sources.list containing both native and multiarch entries
 580         > ${rootfs}/etc/apt/sources.list
 581         write_sourceslist $rootfs $arch "native"
 582
 583         MIRROR=$DEFAULT_MIRROR
 584         SECURITY_MIRROR=$DEFAULT_SECURITY_MIRROR
 585         write_sourceslist $rootfs $hostarch "multiarch"
 586
 587         # Finally update the lists and install upstart using the host architecture
 588         HOST_PACKAGES="upstart:${hostarch} mountall:${hostarch} isc-dhcp-client:${hostarch}"
 589         chroot $rootfs apt-get update
 590         if chroot $rootfs dpkg -l iproute2 | grep -q ^ii; then
 591             HOST_PACKAGES="$HOST_PACKAGES iproute2:${hostarch}"
 592         else
 593             HOST_PACKAGES="$HOST_PACKAGES iproute:${hostarch}"
 594         fi
 595         install_packages $rootfs $HOST_PACKAGES
 596     fi
 597
 598     # Install Packages in container
 599     if [ -n "$packages" ]
 600     then
 601         local packages="`echo $packages | sed 's/,/ /g'`"
 602         echo "Installing packages: ${packages}"
 603         install_packages $rootfs $packages
 604     fi
 605
 606     # Set initial timezone as on host
 607     if [ -f /etc/timezone ]; then
 608         cat /etc/timezone > $rootfs/etc/timezone
 609         chroot $rootfs dpkg-reconfigure -f noninteractive tzdata
 610     elif [ -f /etc/sysconfig/clock ]; then
 611         . /etc/sysconfig/clock
 612         echo $ZONE > $rootfs/etc/timezone
 613         chroot $rootfs dpkg-reconfigure -f noninteractive tzdata
 614     else
 615         echo "Timezone in container is not configured. Adjust it manually."
 616     fi
 617
 618     # rmdir /dev/shm for containers that have /run/shm
 619     # I'm afraid of doing rm -rf $rootfs/dev/shm, in case it did
 620     # get bind mounted to the host's /run/shm.  So try to rmdir
 621     # it, and in case that fails move it out of the way.
 622     # NOTE: This can only be removed once 12.04 goes out of support
 623     if [ ! -L $rootfs/dev/shm ] && [ -e $rootfs/dev/shm ]; then
 624         rmdir $rootfs/dev/shm 2>/dev/null || mv $rootfs/dev/shm $rootfs/dev/shm.bak
 625         ln -s /run/shm $rootfs/dev/shm
 626     fi
 627
 628     # Re-enable service startup
 629     rm $rootfs/usr/sbin/policy-rc.d
 630 }
 631
 632 do_bindhome()
 633 {
 634     rootfs=$1
 635     user=$2
 636
 637     # copy /etc/passwd, /etc/shadow, and /etc/group entries into container
 638     pwd=`getent passwd $user` || { echo "Failed to copy password entry for $user"; false; }
 639     echo $pwd >> $rootfs/etc/passwd
 640
 641     # make sure user's shell exists in the container
 642     shell=`echo $pwd | cut -d: -f 7`
 643     if [ ! -x $rootfs/$shell ]; then
 644         echo "shell $shell for user $user was not found in the container."
 645         pkg=`dpkg -S $(readlink -m $shell) | cut -d ':' -f1`
 646         echo "Installing $pkg"
 647         install_packages $rootfs $pkg
 648     fi
 649
 650     shad=`getent shadow $user`
 651     echo "$shad" >> $rootfs/etc/shadow
 652
 653     # bind-mount the user's path into the container's /home
 654     h=`getent passwd $user | cut -d: -f 6`
 655     mkdir -p $rootfs/$h
 656
 657     # use relative path in container
 658     h2=${h#/}
 659     while [ ${h2:0:1} = "/" ]; do
 660         h2=${h2#/}
 661     done
 662     echo "lxc.mount.entry = $h $h2 none bind 0 0" >> $path/config
 663
 664     # Make sure the group exists in container
 665     grp=`echo $pwd | cut -d: -f 4`  # group number for $user
 666     grpe=`getent group $grp` || return 0  # if host doesn't define grp, ignore in container
 667     chroot $rootfs getent group "$grpe" || echo "$grpe" >> $rootfs/etc/group
 668 }
 669
 670 usage()
 671 {
 672     cat <<EOF
 673 $1 -h|--help [-a|--arch] [-b|--bindhome <user>] [-d|--debug]
 674    [-F | --flush-cache] [-r|--release <release>] [-v|--variant] [ -S | --auth-key <keyfile>]
 675    [--rootfs <rootfs>] [--packages <packages>] [-u|--user <user>] [--password <password>]
 676    [--mirror <url>] [--security-mirror <url>]
 677 release: the ubuntu release (e.g. precise): defaults to host release on ubuntu, otherwise uses latest LTS
 678 variant: debootstrap variant to use (see debootstrap(8))
 679 bindhome: bind <user>'s home into the container
 680           The ubuntu user will not be created, and <user> will have
 681           sudo access.
 682 arch: the container architecture (e.g. amd64): defaults to host arch
 683 auth-key: SSH Public key file to inject into container
 684 packages: list of packages to add comma separated
 685 mirror,security-mirror: mirror for download and /etc/apt/sources.list
 686 EOF
 687     return 0
 688 }
 689
 690 options=$(getopt -o a:b:hp:r:v:n:FS:du: -l arch:,bindhome:,help,path:,release:,variant:,name:,flush-cache,auth-key:,debug,rootfs:,packages:,user:,password:,mirror:,security-mirror: -- "$@")
 691 if [ $? -ne 0 ]; then
 692     usage $(basename $0)
 693     exit 1
 694 fi
 695 eval set -- "$options"
 696
 697 release=precise # Default to the last Ubuntu LTS release for non-Ubuntu systems
 698 if [ -f /etc/lsb-release ]; then
 699     . /etc/lsb-release
 700     if [ "$DISTRIB_ID" = "Ubuntu" ]; then
 701         release=$DISTRIB_CODENAME
 702     fi
 703 fi
 704
 705 bindhome=
 706
 707 # Code taken from debootstrap
 708 if [ -x /usr/bin/dpkg ] && /usr/bin/dpkg --print-architecture >/dev/null 2>&1; then
 709     arch=`/usr/bin/dpkg --print-architecture`
 710 elif which udpkg >/dev/null 2>&1 && udpkg --print-architecture >/dev/null 2>&1; then
 711     arch=`/usr/bin/udpkg --print-architecture`
 712 else
 713     arch=$(uname -m)
 714     if [ "$arch" = "i686" ]; then
 715         arch="i386"
 716     elif [ "$arch" = "x86_64" ]; then
 717         arch="amd64"
 718     elif [ "$arch" = "armv7l" ]; then
 719         arch="armhf"
 720     elif [ "$arch" = "aarch64" ]; then
 721         arch="arm64"
 722     elif [ "$arch" = "ppc64le" ]; then
 723         arch="ppc64el"
 724     fi
 725 fi
 726
 727 debug=0
 728 hostarch=$arch
 729 flushcache=0
 730 packages=""
 731 user="ubuntu"
 732 password="ubuntu"
 733
 734 while true
 735 do
 736     case "$1" in
 737     -h|--help)      usage $0 && exit 0;;
 738     --rootfs)       rootfs=$2; shift 2;;
 739     -p|--path)      path=$2; shift 2;;
 740     -n|--name)      name=$2; shift 2;;
 741     -u|--user)      user=$2; shift 2;;
 742     --password)     password=$2; shift 2;;
 743     -F|--flush-cache) flushcache=1; shift 1;;
 744     -r|--release)   release=$2; shift 2;;
 745     -v|--variant)   variant=$2; shift 2;;
 746     --packages)     packages=$2; shift 2;;
 747     -b|--bindhome)  bindhome=$2; shift 2;;
 748     -a|--arch)      arch=$2; shift 2;;
 749     -S|--auth-key)  auth_key=$2; shift 2;;
 750     -d|--debug)     debug=1; shift 1;;
 751     --mirror)       MIRROR=$2; shift 2;;
 752     --security-mirror) SECURITY_MIRROR=$2; shift 2;;
 753     --)             shift 1; break ;;
 754         *)              break ;;
 755     esac
 756 done
 757
 758 if [ $debug -eq 1 ]; then
 759     set -x
 760 fi
 761
 762 if [ -n "$bindhome" ]; then
 763     pwd=`getent passwd $bindhome`
 764     if [ $? -ne 0 ]; then
 765         echo "Error: no password entry found for $bindhome"
 766         exit 1
 767     fi
 768 fi
 769
 770
 771 if [ "$arch" = "i686" ]; then
 772     arch=i386
 773 fi
 774
 775 if [ $hostarch = "i386" -a $arch = "amd64" ]; then
 776     echo "can't create $arch container on $hostarch"
 777     exit 1
 778 fi
 779
 780 if [ $hostarch = "armhf" -o $hostarch = "armel" -o $hostarch = "arm64" ] && \
 781    [ $arch != "armhf" -a $arch != "armel" -a $arch != "arm64" ]; then
 782     echo "can't create $arch container on $hostarch"
 783     exit 1
 784 fi
 785
 786 if [ $arch = "arm64" ] && [ $hostarch != "arm64" ]; then
 787     echo "can't create $arch container on $hostarch"
 788     exit 1
 789 fi
 790
 791 if [ $hostarch = "powerpc" -a $arch != "powerpc" ]; then
 792     echo "can't create $arch container on $hostarch"
 793     exit 1
 794 fi
 795
 796 which debootstrap >/dev/null 2>&1 || { echo "'debootstrap' command is missing" >&2; false; }
 797
 798 if [ -z "$path" ]; then
 799     echo "'path' parameter is required"
 800     exit 1
 801 fi
 802
 803 if [ "$(id -u)" != "0" ]; then
 804     echo "This script should be run as 'root'"
 805     exit 1
 806 fi
 807
 808 # detect rootfs
 809 config="$path/config"
 810 # if $rootfs exists here, it was passed in with --rootfs
 811 if [ -z "$rootfs" ]; then
 812     if grep -q '^lxc.rootfs' $config 2>/dev/null ; then
 813         rootfs=$(awk -F= '/^lxc.rootfs =/{ print $2 }' $config)
 814     else
 815         rootfs=$path/rootfs
 816     fi
 817 fi
 818
 819 install_ubuntu $rootfs $release $flushcache $LXC_CACHE_PATH
 820 if [ $? -ne 0 ]; then
 821     echo "failed to install ubuntu $release"
 822     exit 1
 823 fi
 824
 825 configure_ubuntu $rootfs $name $release $user $password
 826 if [ $? -ne 0 ]; then
 827     echo "failed to configure ubuntu $release for a container"
 828     exit 1
 829 fi
 830
 831 copy_configuration $path $rootfs $name $arch $release
 832 if [ $? -ne 0 ]; then
 833     echo "failed write configuration file"
 834     exit 1
 835 fi
 836
 837 post_process $rootfs $release $trim_container $packages
 838
 839 if [ -n "$bindhome" ]; then
 840     do_bindhome $rootfs $bindhome
 841     finalize_user $bindhome
 842 else
 843     finalize_user $user
 844 fi
 845
 846 echo ""
 847 echo "##"
 848 if [ -n "$bindhome" ]; then
 849     echo "# Log in as user $bindhome"
 850 else
 851     echo "# The default user is '$user' with password '$password'!"
 852     echo "# Use the 'sudo' command to run tasks as root in the container."
 853 fi
 854 echo "##"
 855 echo ""