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 lxc_network_type=veth
  47 lxc_network_link=virbr0
  48
  49 # is this altlinux?
  50 [ -f /etc/altlinux-release ] && is_altlinux=true
  51
  52 configure_altlinux()
  53 {
  54
  55     # disable selinux in altlinux
  56     mkdir -p $rootfs_path/selinux
  57     echo 0 > $rootfs_path/selinux/enforce
  58
  59     mkdir -p ${rootfs_path}/etc/net/ifaces/eth0
  60     cat <<EOF > ${rootfs_path}/etc/net/ifaces/eth0/options
  61 BOOTPROTO=${BOOTPROTO}
  62 ONBOOT=yes
  63 NM_CONTROLLED=yes
  64 TYPE=eth
  65 EOF
  66
  67 if [ ${BOOTPROTO} != "dhcp" ]; then
  68     # ip address
  69     cat <<EOF > ${rootfs_path}/etc/net/ifaces/eth0/ipv4address
  70 ${ipv4}
  71 EOF
  72
  73     cat <<EOF > ${rootfs_path}/etc/net/ifaces/eth0/ipv4route
  74 ${gw}
  75 EOF
  76
  77     cat <<EOF > ${rootfs_path}/etc/net/ifaces/eth0/resolv.conf
  78 nameserver ${dns}
  79 EOF
  80
  81     cat <<EOF > ${rootfs_path}/etc/net/ifaces/eth0/ipv6address
  82 ${ipv6}
  83 EOF
  84
  85     cat <<EOF > ${rootfs_path}/etc/net/ifaces/eth0/ipv6route
  86 ${gw6}
  87 EOF
  88
  89 fi
  90
  91     # set the hostname
  92     cat <<EOF > ${rootfs_path}/etc/sysconfig/network
  93 NETWORKING=yes
  94 CONFMETHOD=etcnet
  95 HOSTNAME=${UTSNAME}
  96 RESOLV_MODS=yes
  97 EOF
  98
  99     # set minimal hosts
 100     cat <<EOF > $rootfs_path/etc/hosts
 101 127.0.0.1 localhost.localdomain localhost $name
 102 EOF
 103     # Allow to login at virsh console. loginuid.so doen't work in the absence of auditd.
 104 #    sed -i 's/^.*loginuid.so.*$/\#&/' ${rootfs_path}/etc/pam.d/common-login
 105
 106     # Allow root to login at virsh console
 107     echo "pts/0" >> ${rootfs_path}/etc/securetty
 108     echo "console" >> ${rootfs_path}/etc/securetty
 109
 110     # Enable services
 111     for service in network syslogd random NetworkManager
 112     do
 113        chroot ${rootfs_path} chkconfig $service --list &>/dev/null && chroot ${rootfs_path} chkconfig $service on || true
 114        # For systemd
 115        chroot ${rootfs_path} systemctl -q enable $service &>/dev/null|| true
 116     done
 117     # Disable services
 118     for service in rawdevices fbsetfont
 119     do
 120        chroot ${rootfs_path} chkconfig $service --list &>/dev/null && chroot ${rootfs_path} chkconfig $service off || true
 121        chroot ${rootfs_path} systemctl -q disable $service &>/dev/null || true
 122     done
 123
 124     subst 's/^\([3-9]\+:[0-9]\+:respawn:\/sbin\/mingetty.*\)/#\1/' ${rootfs_path}/etc/inittab
 125     echo "c1:2345:respawn:/sbin/mingetty --noclear console" >>  ${rootfs_path}/etc/inittab
 126
 127     [ -f "${rootfs_path}/etc/syslog.conf" ] && \
 128         subst 's,\/dev\/tty12,/var/log/syslog/console,' ${rootfs_path}/etc/syslog.conf
 129
 130     dev_path="${rootfs_path}/dev"
 131     rm -rf ${dev_path}
 132     mkdir -p ${dev_path}
 133     mknod -m 666 ${dev_path}/null c 1 3
 134     mknod -m 666 ${dev_path}/zero c 1 5
 135     mknod -m 644 ${dev_path}/random c 1 8
 136     mknod -m 644 ${dev_path}/urandom c 1 9
 137     mkdir -m 755 ${dev_path}/pts
 138     mkdir -m 1777 ${dev_path}/shm
 139     mknod -m 666 ${dev_path}/tty c 5 0
 140     chown root:tty ${dev_path}/tty
 141     mknod -m 600 ${dev_path}/tty0 c 4 0
 142     mknod -m 600 ${dev_path}/tty1 c 4 1
 143     mknod -m 600 ${dev_path}/tty2 c 4 2
 144     mknod -m 600 ${dev_path}/tty3 c 4 3
 145     mknod -m 600 ${dev_path}/tty4 c 4 4
 146     mknod -m 600 ${dev_path}/console c 5 1
 147     mknod -m 666 ${dev_path}/full c 1 7
 148     mknod -m 600 ${dev_path}/initctl p
 149     mknod -m 666 ${dev_path}/ptmx c 5 2
 150     chown root:tty ${dev_path}/ptmx
 151     ln -s /proc/self/fd ${dev_path}/fd
 152     ln -s /proc/kcore ${dev_path}/core
 153     mkdir -m 755 ${dev_path}/mapper
 154     mknod -m 600 ${dev_path}/mapper/control c 10 236
 155     mkdir -m 755 ${dev_path}/net
 156     mknod -m 666 ${dev_path}/net/tun c 10 200
 157
 158     if [ -n "${root_password}" ]; then
 159         echo "setting root passwd to $root_password"
 160         echo "root:$root_password" | chroot $rootfs_path chpasswd
 161     fi
 162
 163     return 0
 164 }
 165
 166 download_altlinux()
 167 {
 168
 169     # check the mini altlinux was not already downloaded
 170     INSTALL_ROOT=$cache/partial
 171     mkdir -p $INSTALL_ROOT
 172     if [ $? -ne 0 ]; then
 173         echo "Failed to create '$INSTALL_ROOT' directory"
 174         return 1
 175     fi
 176
 177     # download a mini altlinux into a cache
 178     echo "Downloading altlinux minimal ..."
 179     APT_GET="apt-get -o RPM::RootDir=$INSTALL_ROOT -y"
 180     PKG_LIST="$(grep -hs '^[^#]' "$profile_dir/$profile")"
 181     # if no configuration file $profile -- fall back to default list of packages
 182     [ -z "$PKG_LIST" ] && PKG_LIST="interactivesystem apt apt-conf etcnet-full openssh-server systemd-sysvinit systemd-units systemd NetworkManager-daemon"
 183
 184     mkdir -p $INSTALL_ROOT/var/lib/rpm
 185     rpm --root $INSTALL_ROOT  --initdb
 186
 187     # some scripts want to have /dev/null at least
 188     dev_path="$INSTALL_ROOT/dev"
 189     if [ ! -c "${dev_path}/null" ]; then
 190         mkdir -p "${dev_path}"
 191         mknod -m 666 "${dev_path}/null" c 1 3
 192     fi
 193
 194     $APT_GET install $PKG_LIST
 195
 196     if [ $? -ne 0 ]; then
 197         echo "Failed to download the rootfs, aborting."
 198         return 1
 199     fi
 200
 201     mv "$INSTALL_ROOT" "$cache/rootfs"
 202     echo "Download complete."
 203
 204     return 0
 205 }
 206
 207 copy_altlinux()
 208 {
 209
 210     # make a local copy of the minialtlinux
 211     echo -n "Copying rootfs to $rootfs_path ..."
 212     #cp -a $cache/rootfs-$arch $rootfs_path || return 1
 213     # i prefer rsync (no reason really)
 214     mkdir -p $rootfs_path
 215     rsync -Ha $cache/rootfs/ $rootfs_path/
 216     return 0
 217 }
 218
 219 update_altlinux()
 220 {
 221     chroot $cache/rootfs apt-get update
 222     chroot $cache/rootfs apt-get -y dist-upgrade
 223 }
 224
 225 install_altlinux()
 226 {
 227     mkdir -p @LOCALSTATEDIR@/lock/subsys/
 228     (
 229         flock -x 9
 230         if [ $? -ne 0 ]; then
 231             echo "Cache repository is busy."
 232             return 1
 233         fi
 234
 235         echo "Checking cache download in $cache/rootfs ... "
 236         if [ ! -e "$cache/rootfs" ]; then
 237             download_altlinux
 238             if [ $? -ne 0 ]; then
 239                 echo "Failed to download 'altlinux base'"
 240                 return 1
 241             fi
 242         else
 243             echo "Cache found. Updating..."
 244             update_altlinux
 245             if [ $? -ne 0 ]; then
 246                 echo "Failed to update 'altlinux base', continuing with last known good cache"
 247             else
 248                 echo "Update finished"
 249             fi
 250         fi
 251
 252         echo "Copy $cache/rootfs to $rootfs_path ... "
 253         copy_altlinux
 254         if [ $? -ne 0 ]; then
 255             echo "Failed to copy rootfs"
 256             return 1
 257         fi
 258         return 0
 259     ) 9>@LOCALSTATEDIR@/lock/subsys/lxc-altlinux
 260
 261     return $?
 262 }
 263
 264 copy_configuration()
 265 {
 266
 267     mkdir -p $config_path
 268     grep -q "^lxc.rootfs" $config_path/config 2>/dev/null || echo "lxc.rootfs = $rootfs_path" >> $config_path/config
 269     cat <<EOF >> $config_path/config
 270 lxc.uts.name = $name
 271 lxc.tty = 4
 272 lxc.pts = 1024
 273 lxc.cap.drop = sys_module mac_admin mac_override sys_time
 274
 275 # When using LXC with apparmor, uncomment the next line to run unconfined:
 276 #lxc.aa_profile = unconfined
 277
 278 #networking
 279 #lxc.net.0.type = $lxc_network_type
 280 #lxc.net.0.flags = up
 281 #lxc.net.0.link = $lxc_network_link
 282 #lxc.net.0.name = veth0
 283 #lxc.net.0.mtu = 1500
 284 EOF
 285 if [ ! -z ${ipv4} ]; then
 286     cat <<EOF >> $config_path/config
 287 lxc.net.0.ipv4 = $ipv4
 288 EOF
 289 fi
 290 if [ ! -z ${gw} ]; then
 291     cat <<EOF >> $config_path/config
 292 lxc.net.0.ipv4.gateway = $gw
 293 EOF
 294 fi
 295 if [ ! -z ${ipv6} ]; then
 296     cat <<EOF >> $config_path/config
 297 lxc.net.0.ipv6 = $ipv6
 298 EOF
 299 fi
 300 if [ ! -z ${gw6} ]; then
 301     cat <<EOF >> $config_path/config
 302 lxc.net.0.ipv6.gateway = $gw6
 303 EOF
 304 fi
 305     cat <<EOF >> $config_path/config
 306 #cgroups
 307 lxc.cgroup.devices.deny = a
 308 # /dev/null and zero
 309 lxc.cgroup.devices.allow = c 1:3 rwm
 310 lxc.cgroup.devices.allow = c 1:5 rwm
 311 # consoles
 312 lxc.cgroup.devices.allow = c 5:1 rwm
 313 lxc.cgroup.devices.allow = c 5:0 rwm
 314 lxc.cgroup.devices.allow = c 4:0 rwm
 315 lxc.cgroup.devices.allow = c 4:1 rwm
 316 # /dev/{,u}random
 317 lxc.cgroup.devices.allow = c 1:9 rwm
 318 lxc.cgroup.devices.allow = c 1:8 rwm
 319 lxc.cgroup.devices.allow = c 136:* rwm
 320 lxc.cgroup.devices.allow = c 5:2 rwm
 321 # rtc
 322 lxc.cgroup.devices.allow = c 10:135 rwm
 323
 324 lxc.mount.auto = cgroup:mixed proc:mixed sys:mixed
 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=1; shift 1;;
 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"