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     chroot ${rootfs_path} chkconfig network on
 112     chroot ${rootfs_path} chkconfig syslogd on
 113     chroot ${rootfs_path} chkconfig random on
 114     chroot ${rootfs_path} chkconfig rawdevices off
 115     chroot ${rootfs_path} chkconfig fbsetfont off
 116 #    chroot ${rootfs_path} chkconfig keytable off
 117
 118     subst 's/^\([3-9]\+:[0-9]\+:respawn:\/sbin\/mingetty.*\)/#\1/' ${rootfs_path}/etc/inittab
 119     echo "c1:2345:respawn:/sbin/mingetty --noclear console" >>  ${rootfs_path}/etc/inittab
 120     subst 's,\/dev\/tty12,/var/log/syslog/console,' ${rootfs_path}/etc/syslog.conf
 121
 122     dev_path="${rootfs_path}/dev"
 123     rm -rf ${dev_path}
 124     mkdir -p ${dev_path}
 125     mknod -m 666 ${dev_path}/null c 1 3
 126     mknod -m 666 ${dev_path}/zero c 1 5
 127     mknod -m 644 ${dev_path}/random c 1 8
 128     mknod -m 644 ${dev_path}/urandom c 1 9
 129     mkdir -m 755 ${dev_path}/pts
 130     mkdir -m 1777 ${dev_path}/shm
 131     mknod -m 666 ${dev_path}/tty c 5 0
 132     chown root:tty ${dev_path}/tty
 133     mknod -m 600 ${dev_path}/tty0 c 4 0
 134     mknod -m 600 ${dev_path}/tty1 c 4 1
 135     mknod -m 600 ${dev_path}/tty2 c 4 2
 136     mknod -m 600 ${dev_path}/tty3 c 4 3
 137     mknod -m 600 ${dev_path}/tty4 c 4 4
 138     mknod -m 600 ${dev_path}/console c 5 1
 139     mknod -m 666 ${dev_path}/full c 1 7
 140     mknod -m 600 ${dev_path}/initctl p
 141     mknod -m 666 ${dev_path}/ptmx c 5 2
 142     chown root:tty ${dev_path}/ptmx
 143     ln -s /proc/self/fd ${dev_path}/fd
 144     ln -s /proc/kcore ${dev_path}/core
 145     mkdir -m 755 ${dev_path}/mapper
 146     mknod -m 600 ${dev_path}/mapper/control c 10 236
 147     mkdir -m 755 ${dev_path}/net
 148     mknod -m 666 ${dev_path}/net/tun c 10 200
 149
 150     echo "setting root passwd to $root_password"
 151     echo "root:$root_password" | chroot $rootfs_path chpasswd
 152
 153     return 0
 154 }
 155
 156 download_altlinux()
 157 {
 158
 159     # check the mini altlinux was not already downloaded
 160     INSTALL_ROOT=$cache/partial
 161     mkdir -p $INSTALL_ROOT
 162     if [ $? -ne 0 ]; then
 163         echo "Failed to create '$INSTALL_ROOT' directory"
 164         return 1
 165     fi
 166
 167     # download a mini altlinux into a cache
 168     echo "Downloading altlinux minimal ..."
 169     APT_GET="apt-get -o RPM::RootDir=$INSTALL_ROOT -y"
 170     PKG_LIST="$(grep -hs '^[^#]' "$profile_dir/$profile")"
 171     # if no configuration file $profile -- fall back to default list of packages
 172     [ -z "$PKG_LIST" ] && PKG_LIST="interactivesystem apt apt-conf-sisyphus etcnet openssh-server systemd systemd-units systemd-sysvinit"
 173
 174     mkdir -p $INSTALL_ROOT/var/lib/rpm
 175     rpm --root $INSTALL_ROOT  --initdb
 176
 177     # some scripts want to have /dev/null at least
 178     dev_path="$INSTALL_ROOT/dev"
 179     if [ ! -c "${dev_path}/null" ]; then
 180         mkdir -p "${dev_path}"
 181         mknod -m 666 "${dev_path}/null" c 1 3
 182     fi
 183
 184     $APT_GET install $PKG_LIST
 185
 186     if [ $? -ne 0 ]; then
 187         echo "Failed to download the rootfs, aborting."
 188         return 1
 189     fi
 190
 191     mv "$INSTALL_ROOT" "$cache/rootfs"
 192     echo "Download complete."
 193
 194     return 0
 195 }
 196
 197 copy_altlinux()
 198 {
 199
 200     # make a local copy of the minialtlinux
 201     echo -n "Copying rootfs to $rootfs_path ..."
 202     #cp -a $cache/rootfs-$arch $rootfs_path || return 1
 203     # i prefer rsync (no reason really)
 204     mkdir -p $rootfs_path
 205     rsync -Ha $cache/rootfs/ $rootfs_path/
 206     return 0
 207 }
 208
 209 update_altlinux()
 210 {
 211     chroot $cache/rootfs apt-get update
 212     chroot $cache/rootfs apt-get -y dist-upgrade
 213 }
 214
 215 install_altlinux()
 216 {
 217     mkdir -p @LOCALSTATEDIR@/lock/subsys/
 218     (
 219         flock -x 9
 220         if [ $? -ne 0 ]; then
 221             echo "Cache repository is busy."
 222             return 1
 223         fi
 224
 225         echo "Checking cache download in $cache/rootfs ... "
 226         if [ ! -e "$cache/rootfs" ]; then
 227             download_altlinux
 228             if [ $? -ne 0 ]; then
 229                 echo "Failed to download 'altlinux base'"
 230                 return 1
 231             fi
 232         else
 233             echo "Cache found. Updating..."
 234             update_altlinux
 235             if [ $? -ne 0 ]; then
 236                 echo "Failed to update 'altlinux base', continuing with last known good cache"
 237             else
 238                 echo "Update finished"
 239             fi
 240         fi
 241
 242         echo "Copy $cache/rootfs to $rootfs_path ... "
 243         copy_altlinux
 244         if [ $? -ne 0 ]; then
 245             echo "Failed to copy rootfs"
 246             return 1
 247         fi
 248         return 0
 249     ) 9>@LOCALSTATEDIR@/lock/subsys/lxc-altlinux
 250
 251     return $?
 252 }
 253
 254 copy_configuration()
 255 {
 256
 257     mkdir -p $config_path
 258     grep -q "^lxc.rootfs" $config_path/config 2>/dev/null || echo "lxc.rootfs = $rootfs_path" >> $config_path/config
 259     cat <<EOF >> $config_path/config
 260 lxc.utsname = $name
 261 lxc.tty = 4
 262 lxc.pts = 1024
 263 lxc.mount = $config_path/fstab
 264 lxc.cap.drop = sys_module mac_admin mac_override sys_time
 265
 266 # When using LXC with apparmor, uncomment the next line to run unconfined:
 267 #lxc.aa_profile = unconfined
 268
 269 #networking
 270 lxc.network.type = $lxc_network_type
 271 lxc.network.flags = up
 272 lxc.network.link = $lxc_network_link
 273 lxc.network.name = veth0
 274 lxc.network.mtu = 1500
 275 EOF
 276 if [ ! -z ${ipv4} ]; then
 277     cat <<EOF >> $config_path/config
 278 lxc.network.ipv4 = $ipv4
 279 EOF
 280 fi
 281 if [ ! -z ${gw} ]; then
 282     cat <<EOF >> $config_path/config
 283 lxc.network.ipv4.gateway = $gw
 284 EOF
 285 fi
 286 if [ ! -z ${ipv6} ]; then
 287     cat <<EOF >> $config_path/config
 288 lxc.network.ipv6 = $ipv6
 289 EOF
 290 fi
 291 if [ ! -z ${gw6} ]; then
 292     cat <<EOF >> $config_path/config
 293 lxc.network.ipv6.gateway = $gw6
 294 EOF
 295 fi
 296     cat <<EOF >> $config_path/config
 297 #cgroups
 298 lxc.cgroup.devices.deny = a
 299 # /dev/null and zero
 300 lxc.cgroup.devices.allow = c 1:3 rwm
 301 lxc.cgroup.devices.allow = c 1:5 rwm
 302 # consoles
 303 lxc.cgroup.devices.allow = c 5:1 rwm
 304 lxc.cgroup.devices.allow = c 5:0 rwm
 305 lxc.cgroup.devices.allow = c 4:0 rwm
 306 lxc.cgroup.devices.allow = c 4:1 rwm
 307 # /dev/{,u}random
 308 lxc.cgroup.devices.allow = c 1:9 rwm
 309 lxc.cgroup.devices.allow = c 1:8 rwm
 310 lxc.cgroup.devices.allow = c 136:* rwm
 311 lxc.cgroup.devices.allow = c 5:2 rwm
 312 # rtc
 313 lxc.cgroup.devices.allow = c 10:135 rwm
 314 EOF
 315
 316     cat <<EOF > $config_path/fstab
 317 proc            proc         proc    nodev,noexec,nosuid 0 0
 318 sysfs           sys          sysfs   defaults  0 0
 319 EOF
 320
 321     if [ $? -ne 0 ]; then
 322         echo "Failed to add configuration"
 323         return 1
 324     fi
 325
 326     return 0
 327 }
 328
 329 clean()
 330 {
 331
 332     if [ ! -e $cache ]; then
 333         exit 0
 334     fi
 335
 336     # lock, so we won't purge while someone is creating a repository
 337     (
 338         flock -x 9
 339         if [ $? != 0 ]; then
 340             echo "Cache repository is busy."
 341             exit 1
 342         fi
 343
 344         echo -n "Purging the download cache for ALTLinux-$release..."
 345         rm --preserve-root --one-file-system -rf $cache && echo "Done." || exit 1
 346         exit 0
 347     ) 9>@LOCALSTATEDIR@/lock/subsys/lxc-altlinux
 348 }
 349
 350 usage()
 351 {
 352     cat <<EOF
 353 usage:
 354     $1 -n|--name=<container_name>
 355         [-p|--path=<path>] [-c|--clean] [-R|--release=<ALTLinux_release>]
 356         [-4|--ipv4=<ipv4 address>] [-6|--ipv6=<ipv6 address>]
 357         [-g|--gw=<gw address>] [-d|--dns=<dns address>]
 358         [-P|--profile=<name of the profile>] [--rootfs=<path>]
 359         [-A|--arch=<arch of the container>]
 360         [-h|--help]
 361 Mandatory args:
 362   -n,--name         container name, used to as an identifier for that container from now on
 363 Optional args:
 364   -p,--path         path to where the container rootfs will be created, defaults to @LXCPATH@. The container config will go under @LXCPATH@ in that case
 365   -c,--clean        clean the cache
 366   -R,--release      ALTLinux release for the new container. if the host is ALTLinux, then it will defaultto the host's release.
 367   -4,--ipv4         specify the ipv4 address to assign to the virtualized interface, eg. 192.168.1.123/24
 368   -6,--ipv6         specify the ipv6 address to assign to the virtualized interface, eg. 2003:db8:1:0:214:1234:fe0b:3596/64
 369   -g,--gw           specify the default gw, eg. 192.168.1.1
 370   -G,--gw6          specify the default gw, eg. 2003:db8:1:0:214:1234:fe0b:3596
 371   -d,--dns          specify the DNS server, eg. 192.168.1.2
 372   -P,--profile      Profile name is the file name in /etc/lxc/profiles contained packages name for install to cache.
 373   -A,--arch         NOT USED YET. Define what arch the container will be [i686,x86_64]
 374   ---rootfs         rootfs path
 375   -h,--help         print this help
 376 EOF
 377     return 0
 378 }
 379
 380 options=$(getopt -o hp:n:P:cR:4:6:g:d: -l help,rootfs:,path:,name:,profile:,clean,release:,ipv4:,ipv6:,gw:,dns: -- "$@")
 381 if [ $? -ne 0 ]; then
 382     usage $(basename $0)
 383     exit 1
 384 fi
 385 eval set -- "$options"
 386
 387 while true
 388 do
 389     case "$1" in
 390         -h|--help)      usage $0 && exit 0;;
 391         -p|--path)      path=$2; shift 2;;
 392         --rootfs)       rootfs_path=$2; shift 2;;
 393         -n|--name)      name=$2; shift 2;;
 394         -P|--profile)   profile=$2; shift 2;;
 395         -c|--clean)     clean=$2; shift 2;;
 396         -R|--release)   release=$2; shift 2;;
 397         -4|--ipv4)      ipv4=$2; shift 2;;
 398         -6|--ipv6)      ipv6=$2; shift 2;;
 399         -g|--gw)        gw=$2; shift 2;;
 400         -d|--dns)       dns=$2; shift 2;;
 401         --)             shift 1; break ;;
 402         *)              break ;;
 403     esac
 404 done
 405
 406 if [ ! -z "$clean" -a -z "$path" ]; then
 407     clean || exit 1
 408     exit 0
 409 fi
 410
 411 type apt-get >/dev/null 2>&1
 412 if [ $? -ne 0 ]; then
 413     echo "'apt-get' command is missing"
 414     exit 1
 415 fi
 416
 417 if [ -z "$path" ]; then
 418     path=$default_path
 419 fi
 420
 421 if [ -z "$profile" ]; then
 422     profile=$default_profile
 423 fi
 424
 425 if [ -z "$release" ]; then
 426     if [ "$is_altlinux" ]; then
 427         release=$(cat /etc/altlinux-release |awk '/^ALT/ {print $3}')
 428     else
 429         echo "This is not a ALTLinux host and release missing, use -R|--release to specify release"
 430         exit 1
 431     fi
 432 fi
 433
 434 if [ -z "$ipv4" -a -z "$ipv6" ]; then
 435     BOOTPROTO="dhcp"
 436 else
 437     BOOTPROTO="static"
 438 fi
 439
 440 if [ "$(id -u)" != "0" ]; then
 441     echo "This script should be run as 'root'"
 442     exit 1
 443 fi
 444
 445 # check for 'lxc.rootfs' passed in through default config by lxc-create
 446 if [ -z "$rootfs_path" ]; then
 447     if grep -q '^lxc.rootfs' $path/config 2>/dev/null ; then
 448         rootfs_path=$(awk -F= '/^lxc.rootfs =/{ print $2 }' $path/config)
 449     else
 450         rootfs_path=$path/rootfs
 451     fi
 452 fi
 453
 454 config_path=$default_path/$name
 455 cache=$cache_base/$release/$profile
 456
 457 install_altlinux
 458 if [ $? -ne 0 ]; then
 459     echo "failed to install altlinux"
 460     exit 1
 461 fi
 462
 463 configure_altlinux
 464 if [ $? -ne 0 ]; then
 465     echo "failed to configure altlinux for a container"
 466     exit 1
 467 fi
 468
 469 copy_configuration
 470 if [ $? -ne 0 ]; then
 471     echo "failed write configuration file"
 472     exit 1
 473 fi
 474
 475 if [ ! -z $clean ]; then
 476     clean || exit 1
 477     exit 0
 478 fi
 479 echo "container rootfs and config created"
 480 echo "network configured as $lxc_network_type in the $lxc_network_link"