templates/lxc-altlinux.in

   1 #!/bin/bash
   2
   3 #
   4 # template script for generating altlinux container for LXC
   5 #
   6
   7 #
   8 # lxc: linux Container library
   9
  10 # Authors:
  11 # Alexey Shabalin <shaba@altlinux.org>
  12
  13 # This library is free software; you can redistribute it and/or
  14 # modify it under the terms of the GNU Lesser General Public
  15 # License as published by the Free Software Foundation; either
  16 # version 2.1 of the License, or (at your option) any later version.
  17
  18 # This library is distributed in the hope that it will be useful,
  19 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  20 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  21 # Lesser General Public License for more details.
  22
  23 # You should have received a copy of the GNU Lesser General Public
  24 # License along with this library; if not, write to the Free Software
  25 # Foundation, Inc., 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=$PATH:/usr/sbin:/usr/bin:/sbin:/bin
  39
  40 #Configurations
  41 arch=$(uname -m)
  42 cache_base=@LOCALSTATEDIR@/cache/lxc/altlinux/$arch
  43 default_path=@LXCPATH@
  44 default_profile=default
  45 profile_dir=/etc/lxc/profiles
  46 root_password=rooter
  47 lxc_network_type=veth
  48 lxc_network_link=virbr0
  49
  50 # is this altlinux?
  51 [ -f /etc/altlinux-release ] && is_altlinux=true
  52
  53 configure_altlinux()
  54 {
  55
  56     # disable selinux in altlinux
  57     mkdir -p $rootfs_path/selinux
  58     echo 0 > $rootfs_path/selinux/enforce
  59
  60     mkdir -p ${rootfs_path}/etc/net/ifaces/veth0
  61     cat <<EOF > ${rootfs_path}/etc/net/ifaces/veth0/options
  62 BOOTPROTO=${BOOTPROTO}
  63 ONBOOT=yes
  64 NM_CONTROLLED=no
  65 TYPE=eth
  66 EOF
  67
  68 if [ ${BOOTPROTO} != "dhcp" ]; then
  69     # ip address
  70     cat <<EOF > ${rootfs_path}/etc/net/ifaces/veth0/ipv4address
  71 ${ipv4}
  72 EOF
  73
  74     cat <<EOF > ${rootfs_path}/etc/net/ifaces/veth0/ipv4route
  75 ${gw}
  76 EOF
  77
  78     cat <<EOF > ${rootfs_path}/etc/net/ifaces/veth0/resolv.conf
  79 nameserver ${dns}
  80 EOF
  81
  82     cat <<EOF > ${rootfs_path}/etc/net/ifaces/veth0/ipv6address
  83 ${ipv6}
  84 EOF
  85
  86     cat <<EOF > ${rootfs_path}/etc/net/ifaces/veth0/ipv6route
  87 ${gw6}
  88 EOF
  89
  90 fi
  91
  92     # set the hostname
  93     cat <<EOF > ${rootfs_path}/etc/sysconfig/network
  94 NETWORKING=yes
  95 CONFMETHOD=etcnet
  96 HOSTNAME=${UTSNAME}
  97 RESOLV_MODS=yes
  98 EOF
  99
 100     # set minimal hosts
 101     cat <<EOF > $rootfs_path/etc/hosts
 102 127.0.0.1 localhost.localdomain localhost $name
 103 EOF
 104     # Allow to login at virsh console. loginuid.so doen't work in the absence of auditd.
 105 #    sed -i 's/^.*loginuid.so.*$/\#&/' ${rootfs_path}/etc/pam.d/common-login
 106
 107     # Allow root to login at virsh console
 108     echo "pts/0" >> ${rootfs_path}/etc/securetty
 109     echo "console" >> ${rootfs_path}/etc/securetty
 110
 111     # Enable services
 112     for service in network syslogd random
 113     do
 114        chroot ${rootfs_path} chkconfig $service --list &>/dev/null && chroot ${rootfs_path} chkconfig $service on || true
 115     done
 116     # Disable services
 117     for service in rawdevices fbsetfont
 118     do
 119        chroot ${rootfs_path} chkconfig $service --list &>/dev/null && chroot ${rootfs_path} chkconfig $service off || true
 120     done
 121
 122     subst 's/^\([3-9]\+:[0-9]\+:respawn:\/sbin\/mingetty.*\)/#\1/' ${rootfs_path}/etc/inittab
 123     echo "c1:2345:respawn:/sbin/mingetty --noclear console" >>  ${rootfs_path}/etc/inittab
 124
 125     [ -f "${rootfs_path}/etc/syslog.conf" ] && \
 126         subst 's,\/dev\/tty12,/var/log/syslog/console,' ${rootfs_path}/etc/syslog.conf
 127
 128     dev_path="${rootfs_path}/dev"
 129     rm -rf ${dev_path}
 130     mkdir -p ${dev_path}
 131     mknod -m 666 ${dev_path}/null c 1 3
 132     mknod -m 666 ${dev_path}/zero c 1 5
 133     mknod -m 644 ${dev_path}/random c 1 8
 134     mknod -m 644 ${dev_path}/urandom c 1 9
 135     mkdir -m 755 ${dev_path}/pts
 136     mkdir -m 1777 ${dev_path}/shm
 137     mknod -m 666 ${dev_path}/tty c 5 0
 138     chown root:tty ${dev_path}/tty
 139     mknod -m 600 ${dev_path}/tty0 c 4 0
 140     mknod -m 600 ${dev_path}/tty1 c 4 1
 141     mknod -m 600 ${dev_path}/tty2 c 4 2
 142     mknod -m 600 ${dev_path}/tty3 c 4 3
 143     mknod -m 600 ${dev_path}/tty4 c 4 4
 144     mknod -m 600 ${dev_path}/console c 5 1
 145     mknod -m 666 ${dev_path}/full c 1 7
 146     mknod -m 600 ${dev_path}/initctl p
 147     mknod -m 666 ${dev_path}/ptmx c 5 2
 148     chown root:tty ${dev_path}/ptmx
 149     ln -s /proc/self/fd ${dev_path}/fd
 150     ln -s /proc/kcore ${dev_path}/core
 151     mkdir -m 755 ${dev_path}/mapper
 152     mknod -m 600 ${dev_path}/mapper/control c 10 236
 153     mkdir -m 755 ${dev_path}/net
 154     mknod -m 666 ${dev_path}/net/tun c 10 200
 155
 156     echo "setting root passwd to $root_password"
 157     echo "root:$root_password" | chroot $rootfs_path chpasswd
 158
 159     return 0
 160 }
 161
 162 download_altlinux()
 163 {
 164
 165     # check the mini altlinux was not already downloaded
 166     INSTALL_ROOT=$cache/partial
 167     mkdir -p $INSTALL_ROOT
 168     if [ $? -ne 0 ]; then
 169         echo "Failed to create '$INSTALL_ROOT' directory"
 170         return 1
 171     fi
 172
 173     # download a mini altlinux into a cache
 174     echo "Downloading altlinux minimal ..."
 175     APT_GET="apt-get -o RPM::RootDir=$INSTALL_ROOT -y"
 176     PKG_LIST="$(grep -hs '^[^#]' "$profile_dir/$profile")"
 177     # if no configuration file $profile -- fall back to default list of packages
 178     [ -z "$PKG_LIST" ] && PKG_LIST="interactivesystem apt apt-conf-sisyphus etcnet openssh-server systemd systemd-units systemd-sysvinit"
 179
 180     mkdir -p $INSTALL_ROOT/var/lib/rpm
 181     rpm --root $INSTALL_ROOT  --initdb
 182
 183     # some scripts want to have /dev/null at least
 184     dev_path="$INSTALL_ROOT/dev"
 185     if [ ! -c "${dev_path}/null" ]; then
 186         mkdir -p "${dev_path}"
 187         mknod -m 666 "${dev_path}/null" c 1 3
 188     fi
 189
 190     $APT_GET install $PKG_LIST
 191
 192     if [ $? -ne 0 ]; then
 193         echo "Failed to download the rootfs, aborting."
 194         return 1
 195     fi
 196
 197     mv "$INSTALL_ROOT" "$cache/rootfs"
 198     echo "Download complete."
 199
 200     return 0
 201 }
 202
 203 copy_altlinux()
 204 {
 205
 206     # make a local copy of the minialtlinux
 207     echo -n "Copying rootfs to $rootfs_path ..."
 208     #cp -a $cache/rootfs-$arch $rootfs_path || return 1
 209     # i prefer rsync (no reason really)
 210     mkdir -p $rootfs_path
 211     rsync -Ha $cache/rootfs/ $rootfs_path/
 212     return 0
 213 }
 214
 215 update_altlinux()
 216 {
 217     chroot $cache/rootfs apt-get update
 218     chroot $cache/rootfs apt-get -y dist-upgrade
 219 }
 220
 221 install_altlinux()
 222 {
 223     mkdir -p @LOCALSTATEDIR@/lock/subsys/
 224     (
 225         flock -x 9
 226         if [ $? -ne 0 ]; then
 227             echo "Cache repository is busy."
 228             return 1
 229         fi
 230
 231         echo "Checking cache download in $cache/rootfs ... "
 232         if [ ! -e "$cache/rootfs" ]; then
 233             download_altlinux
 234             if [ $? -ne 0 ]; then
 235                 echo "Failed to download 'altlinux base'"
 236                 return 1
 237             fi
 238         else
 239             echo "Cache found. Updating..."
 240             update_altlinux
 241             if [ $? -ne 0 ]; then
 242                 echo "Failed to update 'altlinux base', continuing with last known good cache"
 243             else
 244                 echo "Update finished"
 245             fi
 246         fi
 247
 248         echo "Copy $cache/rootfs to $rootfs_path ... "
 249         copy_altlinux
 250         if [ $? -ne 0 ]; then
 251             echo "Failed to copy rootfs"
 252             return 1
 253         fi
 254         return 0
 255     ) 9>@LOCALSTATEDIR@/lock/subsys/lxc-altlinux
 256
 257     return $?
 258 }
 259
 260 copy_configuration()
 261 {
 262
 263     mkdir -p $config_path
 264     grep -q "^lxc.rootfs" $config_path/config 2>/dev/null || echo "lxc.rootfs = $rootfs_path" >> $config_path/config
 265     cat <<EOF >> $config_path/config
 266 lxc.utsname = $name
 267 lxc.tty = 4
 268 lxc.pts = 1024
 269 lxc.mount = $config_path/fstab
 270 lxc.cap.drop = sys_module mac_admin mac_override sys_time
 271
 272 # When using LXC with apparmor, uncomment the next line to run unconfined:
 273 #lxc.aa_profile = unconfined
 274
 275 #networking
 276 lxc.network.type = $lxc_network_type
 277 lxc.network.flags = up
 278 lxc.network.link = $lxc_network_link
 279 lxc.network.name = veth0
 280 lxc.network.mtu = 1500
 281 EOF
 282 if [ ! -z ${ipv4} ]; then
 283     cat <<EOF >> $config_path/config
 284 lxc.network.ipv4 = $ipv4
 285 EOF
 286 fi
 287 if [ ! -z ${gw} ]; then
 288     cat <<EOF >> $config_path/config
 289 lxc.network.ipv4.gateway = $gw
 290 EOF
 291 fi
 292 if [ ! -z ${ipv6} ]; then
 293     cat <<EOF >> $config_path/config
 294 lxc.network.ipv6 = $ipv6
 295 EOF
 296 fi
 297 if [ ! -z ${gw6} ]; then
 298     cat <<EOF >> $config_path/config
 299 lxc.network.ipv6.gateway = $gw6
 300 EOF
 301 fi
 302     cat <<EOF >> $config_path/config
 303 #cgroups
 304 lxc.cgroup.devices.deny = a
 305 # /dev/null and zero
 306 lxc.cgroup.devices.allow = c 1:3 rwm
 307 lxc.cgroup.devices.allow = c 1:5 rwm
 308 # consoles
 309 lxc.cgroup.devices.allow = c 5:1 rwm
 310 lxc.cgroup.devices.allow = c 5:0 rwm
 311 lxc.cgroup.devices.allow = c 4:0 rwm
 312 lxc.cgroup.devices.allow = c 4:1 rwm
 313 # /dev/{,u}random
 314 lxc.cgroup.devices.allow = c 1:9 rwm
 315 lxc.cgroup.devices.allow = c 1:8 rwm
 316 lxc.cgroup.devices.allow = c 136:* rwm
 317 lxc.cgroup.devices.allow = c 5:2 rwm
 318 # rtc
 319 lxc.cgroup.devices.allow = c 10:135 rwm
 320 EOF
 321
 322     cat <<EOF > $config_path/fstab
 323 proc            proc         proc    nodev,noexec,nosuid 0 0
 324 sysfs           sys          sysfs   defaults  0 0
 325 EOF
 326
 327     if [ $? -ne 0 ]; then
 328         echo "Failed to add configuration"
 329         return 1
 330     fi
 331
 332     return 0
 333 }
 334
 335 clean()
 336 {
 337
 338     if [ ! -e $cache ]; then
 339         exit 0
 340     fi
 341
 342     # lock, so we won't purge while someone is creating a repository
 343     (
 344         flock -x 9
 345         if [ $? != 0 ]; then
 346             echo "Cache repository is busy."
 347             exit 1
 348         fi
 349
 350         echo -n "Purging the download cache for ALTLinux-$release..."
 351         rm --preserve-root --one-file-system -rf $cache && echo "Done." || exit 1
 352         exit 0
 353     ) 9>@LOCALSTATEDIR@/lock/subsys/lxc-altlinux
 354 }
 355
 356 usage()
 357 {
 358     cat <<EOF
 359 usage:
 360     $1 -n|--name=<container_name>
 361         [-p|--path=<path>] [-c|--clean] [-R|--release=<ALTLinux_release>]
 362         [-4|--ipv4=<ipv4 address>] [-6|--ipv6=<ipv6 address>]
 363         [-g|--gw=<gw address>] [-d|--dns=<dns address>]
 364         [-P|--profile=<name of the profile>] [--rootfs=<path>]
 365         [-A|--arch=<arch of the container>]
 366         [-h|--help]
 367 Mandatory args:
 368   -n,--name         container name, used to as an identifier for that container from now on
 369 Optional args:
 370   -p,--path         path to where the container rootfs will be created, defaults to @LXCPATH@. The container config will go under @LXCPATH@ in that case
 371   -c,--clean        clean the cache
 372   -R,--release      ALTLinux release for the new container. if the host is ALTLinux, then it will defaultto the host's release.
 373   -4,--ipv4         specify the ipv4 address to assign to the virtualized interface, eg. 192.168.1.123/24
 374   -6,--ipv6         specify the ipv6 address to assign to the virtualized interface, eg. 2003:db8:1:0:214:1234:fe0b:3596/64
 375   -g,--gw           specify the default gw, eg. 192.168.1.1
 376   -G,--gw6          specify the default gw, eg. 2003:db8:1:0:214:1234:fe0b:3596
 377   -d,--dns          specify the DNS server, eg. 192.168.1.2
 378   -P,--profile      Profile name is the file name in /etc/lxc/profiles contained packages name for install to cache.
 379   -A,--arch         NOT USED YET. Define what arch the container will be [i686,x86_64]
 380   ---rootfs         rootfs path
 381   -h,--help         print this help
 382 EOF
 383     return 0
 384 }
 385
 386 options=$(getopt -o hp:n:P:cR:4:6:g:d: -l help,rootfs:,path:,name:,profile:,clean,release:,ipv4:,ipv6:,gw:,dns: -- "$@")
 387 if [ $? -ne 0 ]; then
 388     usage $(basename $0)
 389     exit 1
 390 fi
 391 eval set -- "$options"
 392
 393 while true
 394 do
 395     case "$1" in
 396         -h|--help)      usage $0 && exit 0;;
 397         -p|--path)      path=$2; shift 2;;
 398         --rootfs)       rootfs_path=$2; shift 2;;
 399         -n|--name)      name=$2; shift 2;;
 400         -P|--profile)   profile=$2; shift 2;;
 401         -c|--clean)     clean=$2; shift 2;;
 402         -R|--release)   release=$2; shift 2;;
 403         -4|--ipv4)      ipv4=$2; shift 2;;
 404         -6|--ipv6)      ipv6=$2; shift 2;;
 405         -g|--gw)        gw=$2; shift 2;;
 406         -d|--dns)       dns=$2; shift 2;;
 407         --)             shift 1; break ;;
 408         *)              break ;;
 409     esac
 410 done
 411
 412 if [ ! -z "$clean" -a -z "$path" ]; then
 413     clean || exit 1
 414     exit 0
 415 fi
 416
 417 type apt-get >/dev/null 2>&1
 418 if [ $? -ne 0 ]; then
 419     echo "'apt-get' command is missing"
 420     exit 1
 421 fi
 422
 423 if [ -z "$path" ]; then
 424     path=$default_path
 425 fi
 426
 427 if [ -z "$profile" ]; then
 428     profile=$default_profile
 429 fi
 430
 431 if [ -z "$release" ]; then
 432     if [ "$is_altlinux" ]; then
 433         release=$(cat /etc/altlinux-release |awk '/^ALT/ {print $3}')
 434     else
 435         echo "This is not a ALTLinux host and release missing, use -R|--release to specify release"
 436         exit 1
 437     fi
 438 fi
 439
 440 if [ -z "$ipv4" -a -z "$ipv6" ]; then
 441     BOOTPROTO="dhcp"
 442 else
 443     BOOTPROTO="static"
 444 fi
 445
 446 if [ "$(id -u)" != "0" ]; then
 447     echo "This script should be run as 'root'"
 448     exit 1
 449 fi
 450
 451 # check for 'lxc.rootfs' passed in through default config by lxc-create
 452 if [ -z "$rootfs_path" ]; then
 453     if grep -q '^lxc.rootfs' $path/config 2>/dev/null ; then
 454         rootfs_path=$(awk -F= '/^lxc.rootfs =/{ print $2 }' $path/config)
 455     else
 456         rootfs_path=$path/rootfs
 457     fi
 458 fi
 459
 460 config_path=$default_path/$name
 461 cache=$cache_base/$release/$profile
 462
 463 install_altlinux
 464 if [ $? -ne 0 ]; then
 465     echo "failed to install altlinux"
 466     exit 1
 467 fi
 468
 469 configure_altlinux
 470 if [ $? -ne 0 ]; then
 471     echo "failed to configure altlinux for a container"
 472     exit 1
 473 fi
 474
 475 copy_configuration
 476 if [ $? -ne 0 ]; then
 477     echo "failed write configuration file"
 478     exit 1
 479 fi
 480
 481 if [ ! -z $clean ]; then
 482     clean || exit 1
 483     exit 0
 484 fi
 485 echo "container rootfs and config created"
 486 echo "network configured as $lxc_network_type in the $lxc_network_link"