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=$3
 333
 334     packages_template=${packages_template:-"ssh,vim"}
 335
 336     # Try to guess a list of langpacks to install
 337     langpacks="language-pack-en"
 338
 339     if which dpkg >/dev/null 2>&1; then
 340         langpacks=`(echo $langpacks &&
 341                     dpkg -l | grep -E "^ii  language-pack-[a-z]* " |
 342                         cut -d ' ' -f3) | sort -u`
 343     fi
 344     packages_template="${packages_template},$(echo $langpacks | sed 's/ /,/g')"
 345
 346     if [ $variant == 'minbase' ]; then
 347         packages_template="${packages_template},sudo,ifupdown,isc-dhcp-client"
 348     fi
 349
 350     echo "Installing packages in template: ${packages_template}"
 351
 352     trap cleanup EXIT SIGHUP SIGINT SIGTERM
 353     # check the mini ubuntu was not already downloaded
 354     try_mksubvolume "$cache/partial-$arch"
 355     if [ $? -ne 0 ]; then
 356         echo "Failed to create '$cache/partial-$arch' directory"
 357         return 1
 358     fi
 359
 360     choose_container_proxy $cache/partial-$arch/ $arch
 361     # download a mini ubuntu into a cache
 362     echo "Downloading ubuntu $release minimal ..."
 363     if [ -n "$(which qemu-debootstrap)" ]; then
 364         qemu-debootstrap --verbose $(if [ -n "$variant" ]; then echo --variant="$variant"; fi) --components=main,universe --arch=$arch --include=${packages_template} $release $cache/partial-$arch $MIRROR
 365     else
 366         debootstrap --verbose $(if [ -n "$variant" ]; then echo --variant="$variant"; fi) --components=main,universe --arch=$arch --include=${packages_template} $release $cache/partial-$arch $MIRROR
 367     fi
 368
 369     if [ $? -ne 0 ]; then
 370         echo "Failed to download the rootfs, aborting."
 371             return 1
 372     fi
 373
 374     # Serge isn't sure whether we should avoid doing this when
 375     # $release == `distro-info -d`
 376     echo "Installing updates"
 377     > $cache/partial-$arch/etc/apt/sources.list
 378     write_sourceslist $cache/partial-$arch/ $arch
 379
 380     chroot "$1/partial-${arch}" apt-get update
 381     if [ $? -ne 0 ]; then
 382         echo "Failed to update the apt cache"
 383         return 1
 384     fi
 385     cat > "$1/partial-${arch}"/usr/sbin/policy-rc.d << EOF
 386 #!/bin/sh
 387 exit 101
 388 EOF
 389     chmod +x "$1/partial-${arch}"/usr/sbin/policy-rc.d
 390
 391     lxc-unshare -s MOUNT -- chroot "$1/partial-${arch}" apt-get dist-upgrade -y || { suggest_flush; false; }
 392     rm -f "$1/partial-${arch}"/usr/sbin/policy-rc.d
 393
 394     chroot "$1/partial-${arch}" apt-get clean
 395
 396     mv "$1/partial-$arch" "$1/rootfs-$arch"
 397     trap EXIT
 398     trap SIGINT
 399     trap SIGTERM
 400     trap SIGHUP
 401     echo "Download complete"
 402     return 0
 403 }
 404
 405 copy_ubuntu()
 406 {
 407     cache=$1
 408     arch=$2
 409     rootfs=$3
 410
 411     # make a local copy of the miniubuntu
 412     echo "Copying rootfs to $rootfs ..."
 413     try_mksubvolume $rootfs
 414     if which btrfs >/dev/null 2>&1 && is_btrfs_subvolume $cache/rootfs-$arch && is_btrfs_subvolume $rootfs; then
 415       realrootfs=$(dirname $config)/rootfs
 416       [ "$rootfs" = "$realrootfs" ] || umount $rootfs || return 1
 417       btrfs subvolume delete $realrootfs || return 1
 418       btrfs subvolume snapshot $cache/rootfs-$arch $realrootfs || return 1
 419       [ "$rootfs" = "$realrootfs" ] || mount --bind $realrootfs $rootfs || return 1
 420     else
 421       rsync -Ha $cache/rootfs-$arch/ $rootfs/ || return 1
 422     fi
 423     return 0
 424 }
 425
 426 install_ubuntu()
 427 {
 428     rootfs=$1
 429     release=$2
 430     flushcache=$3
 431     cache="$4/$release"
 432     mkdir -p $LOCALSTATEDIR/lock/subsys/
 433
 434     (
 435         flock -x 9
 436         if [ $? -ne 0 ]; then
 437             echo "Cache repository is busy."
 438             return 1
 439         fi
 440
 441
 442         if [ $flushcache -eq 1 ]; then
 443             echo "Flushing cache..."
 444             try_rmsubvolume $cache/partial-$arch
 445             try_rmsubvolume $cache/rootfs-$arch
 446         fi
 447
 448         echo "Checking cache download in $cache/rootfs-$arch ... "
 449         if [ ! -e "$cache/rootfs-$arch" ]; then
 450             download_ubuntu $cache $arch $release
 451             if [ $? -ne 0 ]; then
 452                 echo "Failed to download 'ubuntu $release base'"
 453                 return 1
 454             fi
 455         fi
 456
 457         echo "Copy $cache/rootfs-$arch to $rootfs ... "
 458         copy_ubuntu $cache $arch $rootfs
 459         if [ $? -ne 0 ]; then
 460             echo "Failed to copy rootfs"
 461             return 1
 462         fi
 463
 464         return 0
 465
 466     ) 9>$LOCALSTATEDIR/lock/subsys/lxc-ubuntu$release
 467
 468     return $?
 469 }
 470
 471 copy_configuration()
 472 {
 473     path=$1
 474     rootfs=$2
 475     name=$3
 476     arch=$4
 477     release=$5
 478
 479     if [ $arch = "i386" ]; then
 480         arch="i686"
 481     fi
 482
 483     # if there is exactly one veth network entry, make sure it has an
 484     # associated hwaddr.
 485     nics=`grep -e '^lxc\.network\.type[ \t]*=[ \t]*veth' $path/config | wc -l`
 486     if [ $nics -eq 1 ]; then
 487         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
 488     fi
 489
 490     # Generate the configuration file
 491     ## Relocate all the network config entries
 492     sed -i -e "/lxc.network/{w ${path}/config-network" -e "d}" $path/config
 493
 494     ## Relocate any other config entries
 495     sed -i -e "/lxc./{w ${path}/config-auto" -e "d}" $path/config
 496
 497     ## Add all the includes
 498     echo "" >> $path/config
 499     echo "# Common configuration" >> $path/config
 500     if [ -e "${LXC_TEMPLATE_CONFIG}/ubuntu.common.conf" ]; then
 501         echo "lxc.include = ${LXC_TEMPLATE_CONFIG}/ubuntu.common.conf" >> $path/config
 502     fi
 503     if [ -e "${LXC_TEMPLATE_CONFIG}/ubuntu.${release}.conf" ]; then
 504         echo "lxc.include = ${LXC_TEMPLATE_CONFIG}/ubuntu.${release}.conf" >> $path/config
 505     fi
 506
 507     ## Add the container-specific config
 508     echo "" >> $path/config
 509     echo "# Container specific configuration" >> $path/config
 510     [ -e "$path/config-auto" ] && cat $path/config-auto >> $path/config && rm $path/config-auto
 511     grep -q "^lxc.rootfs" $path/config 2>/dev/null || echo "lxc.rootfs = $rootfs" >> $path/config
 512     cat <<EOF >> $path/config
 513 lxc.utsname = $name
 514 lxc.arch = $arch
 515 EOF
 516
 517     ## Re-add the previously removed network config
 518     echo "" >> $path/config
 519     echo "# Network configuration" >> $path/config
 520     cat $path/config-network >> $path/config
 521     rm $path/config-network
 522
 523     if [ $? -ne 0 ]; then
 524         echo "Failed to add configuration"
 525         return 1
 526     fi
 527
 528     return 0
 529 }
 530
 531 post_process()
 532 {
 533     rootfs=$1
 534     release=$2
 535     packages=$3
 536
 537     # Disable service startup
 538     cat > $rootfs/usr/sbin/policy-rc.d << EOF
 539 #!/bin/sh
 540 exit 101
 541 EOF
 542     chmod +x $rootfs/usr/sbin/policy-rc.d
 543
 544     # If the container isn't running a native architecture, setup multiarch
 545     if [ -x "$(ls -1 ${rootfs}/usr/bin/qemu-*-static 2>/dev/null)" ]; then
 546         dpkg_version=$(chroot $rootfs dpkg-query -W -f='${Version}' dpkg)
 547         if chroot $rootfs dpkg --compare-versions $dpkg_version ge "1.16.2"; then
 548             chroot $rootfs dpkg --add-architecture ${hostarch}
 549         else
 550             mkdir -p ${rootfs}/etc/dpkg/dpkg.cfg.d
 551             echo "foreign-architecture ${hostarch}" > ${rootfs}/etc/dpkg/dpkg.cfg.d/lxc-multiarch
 552         fi
 553
 554         # Save existing value of MIRROR and SECURITY_MIRROR
 555         DEFAULT_MIRROR=$MIRROR
 556         DEFAULT_SECURITY_MIRROR=$SECURITY_MIRROR
 557
 558         # Write a new sources.list containing both native and multiarch entries
 559         > ${rootfs}/etc/apt/sources.list
 560         write_sourceslist $rootfs $arch "native"
 561
 562         MIRROR=$DEFAULT_MIRROR
 563         SECURITY_MIRROR=$DEFAULT_SECURITY_MIRROR
 564         write_sourceslist $rootfs $hostarch "multiarch"
 565
 566         # Finally update the lists and install upstart using the host architecture
 567         HOST_PACKAGES="upstart:${hostarch} mountall:${hostarch} isc-dhcp-client:${hostarch}"
 568         chroot $rootfs apt-get update
 569         if chroot $rootfs dpkg -l iproute2 | grep -q ^ii; then
 570             HOST_PACKAGES="$HOST_PACKAGES iproute2:${hostarch}"
 571         else
 572             HOST_PACKAGES="$HOST_PACKAGES iproute:${hostarch}"
 573         fi
 574         install_packages $rootfs $HOST_PACKAGES
 575     fi
 576
 577     # Install Packages in container
 578     if [ -n "$packages" ]
 579     then
 580         local packages="`echo $packages | sed 's/,/ /g'`"
 581         echo "Installing packages: ${packages}"
 582         install_packages $rootfs $packages
 583     fi
 584
 585     # Set initial timezone as on host
 586     if [ -f /etc/timezone ]; then
 587         cat /etc/timezone > $rootfs/etc/timezone
 588         chroot $rootfs dpkg-reconfigure -f noninteractive tzdata
 589     elif [ -f /etc/sysconfig/clock ]; then
 590         . /etc/sysconfig/clock
 591         echo $ZONE > $rootfs/etc/timezone
 592         chroot $rootfs dpkg-reconfigure -f noninteractive tzdata
 593     else
 594         echo "Timezone in container is not configured. Adjust it manually."
 595     fi
 596
 597     # rmdir /dev/shm for containers that have /run/shm
 598     # I'm afraid of doing rm -rf $rootfs/dev/shm, in case it did
 599     # get bind mounted to the host's /run/shm.  So try to rmdir
 600     # it, and in case that fails move it out of the way.
 601     # NOTE: This can only be removed once 12.04 goes out of support
 602     if [ ! -L $rootfs/dev/shm ] && [ -e $rootfs/dev/shm ]; then
 603         rmdir $rootfs/dev/shm 2>/dev/null || mv $rootfs/dev/shm $rootfs/dev/shm.bak
 604         ln -s /run/shm $rootfs/dev/shm
 605     fi
 606
 607     # Re-enable service startup
 608     rm $rootfs/usr/sbin/policy-rc.d
 609 }
 610
 611 do_bindhome()
 612 {
 613     rootfs=$1
 614     user=$2
 615
 616     # copy /etc/passwd, /etc/shadow, and /etc/group entries into container
 617     pwd=`getent passwd $user` || { echo "Failed to copy password entry for $user"; false; }
 618     echo $pwd >> $rootfs/etc/passwd
 619
 620     # make sure user's shell exists in the container
 621     shell=`echo $pwd | cut -d: -f 7`
 622     if [ ! -x $rootfs/$shell ]; then
 623         echo "shell $shell for user $user was not found in the container."
 624         pkg=`dpkg -S $(readlink -m $shell) | cut -d ':' -f1`
 625         echo "Installing $pkg"
 626         install_packages $rootfs $pkg
 627     fi
 628
 629     shad=`getent shadow $user`
 630     echo "$shad" >> $rootfs/etc/shadow
 631
 632     # bind-mount the user's path into the container's /home
 633     h=`getent passwd $user | cut -d: -f 6`
 634     mkdir -p $rootfs/$h
 635
 636     # use relative path in container
 637     h2=${h#/}
 638     while [ ${h2:0:1} = "/" ]; do
 639         h2=${h2#/}
 640     done
 641     echo "lxc.mount.entry = $h $h2 none bind 0 0" >> $path/config
 642
 643     # Make sure the group exists in container
 644     grp=`echo $pwd | cut -d: -f 4`  # group number for $user
 645     grpe=`getent group $grp` || return 0  # if host doesn't define grp, ignore in container
 646     chroot $rootfs getent group "$grpe" || echo "$grpe" >> $rootfs/etc/group
 647 }
 648
 649 usage()
 650 {
 651     cat <<EOF
 652 $1 -h|--help [-a|--arch] [-b|--bindhome <user>] [-d|--debug]
 653    [-F | --flush-cache] [-r|--release <release>] [-v|--variant] [ -S | --auth-key <keyfile>]
 654    [--rootfs <rootfs>] [--packages <packages>] [-u|--user <user>] [--password <password>]
 655    [--mirror <url>] [--security-mirror <url>]
 656 release: the ubuntu release (e.g. precise): defaults to host release on ubuntu, otherwise uses latest LTS
 657 variant: debootstrap variant to use (see debootstrap(8))
 658 bindhome: bind <user>'s home into the container
 659           The ubuntu user will not be created, and <user> will have
 660           sudo access.
 661 arch: the container architecture (e.g. amd64): defaults to host arch
 662 auth-key: SSH Public key file to inject into container
 663 packages: list of packages to add comma separated
 664 mirror,security-mirror: mirror for download and /etc/apt/sources.list
 665 EOF
 666     return 0
 667 }
 668
 669 options=$(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: -- "$@")
 670 if [ $? -ne 0 ]; then
 671     usage $(basename $0)
 672     exit 1
 673 fi
 674 eval set -- "$options"
 675
 676 release=precise # Default to the last Ubuntu LTS release for non-Ubuntu systems
 677 if [ -f /etc/lsb-release ]; then
 678     . /etc/lsb-release
 679     if [ "$DISTRIB_ID" = "Ubuntu" ]; then
 680         release=$DISTRIB_CODENAME
 681     fi
 682 fi
 683
 684 bindhome=
 685
 686 # Code taken from debootstrap
 687 if [ -x /usr/bin/dpkg ] && /usr/bin/dpkg --print-architecture >/dev/null 2>&1; then
 688     arch=`/usr/bin/dpkg --print-architecture`
 689 elif which udpkg >/dev/null 2>&1 && udpkg --print-architecture >/dev/null 2>&1; then
 690     arch=`/usr/bin/udpkg --print-architecture`
 691 else
 692     arch=$(uname -m)
 693     if [ "$arch" = "i686" ]; then
 694         arch="i386"
 695     elif [ "$arch" = "x86_64" ]; then
 696         arch="amd64"
 697     elif [ "$arch" = "armv7l" ]; then
 698         arch="armhf"
 699     elif [ "$arch" = "aarch64" ]; then
 700         arch="arm64"
 701     elif [ "$arch" = "ppc64le" ]; then
 702         arch="ppc64el"
 703     fi
 704 fi
 705
 706 debug=0
 707 hostarch=$arch
 708 flushcache=0
 709 packages=""
 710 user="ubuntu"
 711 password="ubuntu"
 712
 713 while true
 714 do
 715     case "$1" in
 716     -h|--help)      usage $0 && exit 0;;
 717     --rootfs)       rootfs=$2; shift 2;;
 718     -p|--path)      path=$2; shift 2;;
 719     -n|--name)      name=$2; shift 2;;
 720     -u|--user)      user=$2; shift 2;;
 721     --password)     password=$2; shift 2;;
 722     -F|--flush-cache) flushcache=1; shift 1;;
 723     -r|--release)   release=$2; shift 2;;
 724     -v|--variant)   variant=$2; shift 2;;
 725     --packages)     packages=$2; shift 2;;
 726     -b|--bindhome)  bindhome=$2; shift 2;;
 727     -a|--arch)      arch=$2; shift 2;;
 728     -S|--auth-key)  auth_key=$2; shift 2;;
 729     -d|--debug)     debug=1; shift 1;;
 730     --mirror)       MIRROR=$2; shift 2;;
 731     --security-mirror) SECURITY_MIRROR=$2; shift 2;;
 732     --)             shift 1; break ;;
 733         *)              break ;;
 734     esac
 735 done
 736
 737 if [ $debug -eq 1 ]; then
 738     set -x
 739 fi
 740
 741 if [ -n "$bindhome" ]; then
 742     pwd=`getent passwd $bindhome`
 743     if [ $? -ne 0 ]; then
 744         echo "Error: no password entry found for $bindhome"
 745         exit 1
 746     fi
 747 fi
 748
 749
 750 if [ "$arch" = "i686" ]; then
 751     arch=i386
 752 fi
 753
 754 if [ $hostarch = "i386" -a $arch = "amd64" ]; then
 755     echo "can't create $arch container on $hostarch"
 756     exit 1
 757 fi
 758
 759 if [ $hostarch = "armhf" -o $hostarch = "armel" -o $hostarch = "arm64" ] && \
 760    [ $arch != "armhf" -a $arch != "armel" -a $arch != "arm64" ]; then
 761     echo "can't create $arch container on $hostarch"
 762     exit 1
 763 fi
 764
 765 if [ $arch = "arm64" ] && [ $hostarch != "arm64" ]; then
 766     echo "can't create $arch container on $hostarch"
 767     exit 1
 768 fi
 769
 770 if [ $hostarch = "powerpc" -a $arch != "powerpc" ]; then
 771     echo "can't create $arch container on $hostarch"
 772     exit 1
 773 fi
 774
 775 which debootstrap >/dev/null 2>&1 || { echo "'debootstrap' command is missing" >&2; false; }
 776
 777 if [ -z "$path" ]; then
 778     echo "'path' parameter is required"
 779     exit 1
 780 fi
 781
 782 if [ "$(id -u)" != "0" ]; then
 783     echo "This script should be run as 'root'"
 784     exit 1
 785 fi
 786
 787 # detect rootfs
 788 config="$path/config"
 789 # if $rootfs exists here, it was passed in with --rootfs
 790 if [ -z "$rootfs" ]; then
 791     if grep -q '^lxc.rootfs' $config 2>/dev/null ; then
 792         rootfs=$(awk -F= '/^lxc.rootfs =/{ print $2 }' $config)
 793     else
 794         rootfs=$path/rootfs
 795     fi
 796 fi
 797
 798 install_ubuntu $rootfs $release $flushcache $LXC_CACHE_PATH
 799 if [ $? -ne 0 ]; then
 800     echo "failed to install ubuntu $release"
 801     exit 1
 802 fi
 803
 804 configure_ubuntu $rootfs $name $release $user $password
 805 if [ $? -ne 0 ]; then
 806     echo "failed to configure ubuntu $release for a container"
 807     exit 1
 808 fi
 809
 810 copy_configuration $path $rootfs $name $arch $release
 811 if [ $? -ne 0 ]; then
 812     echo "failed write configuration file"
 813     exit 1
 814 fi
 815
 816 post_process $rootfs $release $trim_container $packages
 817
 818 if [ -n "$bindhome" ]; then
 819     do_bindhome $rootfs $bindhome
 820     finalize_user $bindhome
 821 else
 822     finalize_user $user
 823 fi
 824
 825 echo ""
 826 echo "##"
 827 if [ -n "$bindhome" ]; then
 828     echo "# Log in as user $bindhome"
 829 else
 830     echo "# The default user is '$user' with password '$password'!"
 831     echo "# Use the 'sudo' command to run tasks as root in the container."
 832 fi
 833 echo "##"
 834 echo ""