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/eth0
  61     cat <<EOF > ${rootfs_path}/etc/net/ifaces/eth0/options
  62 BOOTPROTO=${BOOTPROTO}
  63 ONBOOT=yes
  64 NM_CONTROLLED=yes
  65 TYPE=eth
  66 EOF
  67
  68 if [ ${BOOTPROTO} != "dhcp" ]; then
  69     # ip address
  70     cat <<EOF > ${rootfs_path}/etc/net/ifaces/eth0/ipv4address
  71 ${ipv4}
  72 EOF
  73
  74     cat <<EOF > ${rootfs_path}/etc/net/ifaces/eth0/ipv4route
  75 ${gw}
  76 EOF
  77
  78     cat <<EOF > ${rootfs_path}/etc/net/ifaces/eth0/resolv.conf
  79 nameserver ${dns}
  80 EOF
  81
  82     cat <<EOF > ${rootfs_path}/etc/net/ifaces/eth0/ipv6address
  83 ${ipv6}
  84 EOF
  85
  86     cat <<EOF > ${rootfs_path}/etc/net/ifaces/eth0/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 NetworkManager
 113     do
 114        chroot ${rootfs_path} chkconfig $service --list &>/dev/null && chroot ${rootfs_path} chkconfig $service on || true
 115        # For systemd
 116        chroot ${rootfs_path} systemctl -q enable $service &>/dev/null|| true
 117     done
 118     # Disable services
 119     for service in rawdevices fbsetfont
 120     do
 121        chroot ${rootfs_path} chkconfig $service --list &>/dev/null && chroot ${rootfs_path} chkconfig $service off || true
 122        chroot ${rootfs_path} systemctl -q disable $service &>/dev/null || true
 123     done
 124
 125     subst 's/^\([3-9]\+:[0-9]\+:respawn:\/sbin\/mingetty.*\)/#\1/' ${rootfs_path}/etc/inittab
 126     echo "c1:2345:respawn:/sbin/mingetty --noclear console" >>  ${rootfs_path}/etc/inittab
 127
 128     [ -f "${rootfs_path}/etc/syslog.conf" ] && \
 129         subst 's,\/dev\/tty12,/var/log/syslog/console,' ${rootfs_path}/etc/syslog.conf
 130
 131     dev_path="${rootfs_path}/dev"
 132     rm -rf ${dev_path}
 133     mkdir -p ${dev_path}
 134     mknod -m 666 ${dev_path}/null c 1 3
 135     mknod -m 666 ${dev_path}/zero c 1 5
 136     mknod -m 644 ${dev_path}/random c 1 8
 137     mknod -m 644 ${dev_path}/urandom c 1 9
 138     mkdir -m 755 ${dev_path}/pts
 139     mkdir -m 1777 ${dev_path}/shm
 140     mknod -m 666 ${dev_path}/tty c 5 0
 141     chown root:tty ${dev_path}/tty
 142     mknod -m 600 ${dev_path}/tty0 c 4 0
 143     mknod -m 600 ${dev_path}/tty1 c 4 1
 144     mknod -m 600 ${dev_path}/tty2 c 4 2
 145     mknod -m 600 ${dev_path}/tty3 c 4 3
 146     mknod -m 600 ${dev_path}/tty4 c 4 4
 147     mknod -m 600 ${dev_path}/console c 5 1
 148     mknod -m 666 ${dev_path}/full c 1 7
 149     mknod -m 600 ${dev_path}/initctl p
 150     mknod -m 666 ${dev_path}/ptmx c 5 2
 151     chown root:tty ${dev_path}/ptmx
 152     ln -s /proc/self/fd ${dev_path}/fd
 153     ln -s /proc/kcore ${dev_path}/core
 154     mkdir -m 755 ${dev_path}/mapper
 155     mknod -m 600 ${dev_path}/mapper/control c 10 236
 156     mkdir -m 755 ${dev_path}/net
 157     mknod -m 666 ${dev_path}/net/tun c 10 200
 158
 159     echo "setting root passwd to $root_password"
 160     echo "root:$root_password" | chroot $rootfs_path chpasswd
 161
 162     return 0
 163 }
 164
 165 download_altlinux()
 166 {
 167
 168     # check the mini altlinux was not already downloaded
 169     INSTALL_ROOT=$cache/partial
 170     mkdir -p $INSTALL_ROOT
 171     if [ $? -ne 0 ]; then
 172         echo "Failed to create '$INSTALL_ROOT' directory"
 173         return 1
 174     fi
 175
 176     # download a mini altlinux into a cache
 177     echo "Downloading altlinux minimal ..."
 178     APT_GET="apt-get -o RPM::RootDir=$INSTALL_ROOT -y"
 179     PKG_LIST="$(grep -hs '^[^#]' "$profile_dir/$profile")"
 180     # if no configuration file $profile -- fall back to default list of packages
 181     [ -z "$PKG_LIST" ] && PKG_LIST="interactivesystem apt apt-conf-sisyphus etcnet-full openssh-server systemd-sysvinit systemd-units systemd NetworkManager-daemon"
 182
 183     mkdir -p $INSTALL_ROOT/var/lib/rpm
 184     rpm --root $INSTALL_ROOT  --initdb
 185
 186     # some scripts want to have /dev/null at least
 187     dev_path="$INSTALL_ROOT/dev"
 188     if [ ! -c "${dev_path}/null" ]; then
 189         mkdir -p "${dev_path}"
 190         mknod -m 666 "${dev_path}/null" c 1 3
 191     fi
 192
 193     $APT_GET install $PKG_LIST
 194
 195     if [ $? -ne 0 ]; then
 196         echo "Failed to download the rootfs, aborting."
 197         return 1
 198     fi
 199
 200     mv "$INSTALL_ROOT" "$cache/rootfs"
 201     echo "Download complete."
 202
 203     return 0
 204 }
 205
 206 copy_altlinux()
 207 {
 208
 209     # make a local copy of the minialtlinux
 210     echo -n "Copying rootfs to $rootfs_path ..."
 211     #cp -a $cache/rootfs-$arch $rootfs_path || return 1
 212     # i prefer rsync (no reason really)
 213     mkdir -p $rootfs_path
 214     rsync -Ha $cache/rootfs/ $rootfs_path/
 215     return 0
 216 }
 217
 218 update_altlinux()
 219 {
 220     chroot $cache/rootfs apt-get update
 221     chroot $cache/rootfs apt-get -y dist-upgrade
 222 }
 223
 224 install_altlinux()
 225 {
 226     mkdir -p @LOCALSTATEDIR@/lock/subsys/
 227     (
 228         flock -x 9
 229         if [ $? -ne 0 ]; then
 230             echo "Cache repository is busy."
 231             return 1
 232         fi
 233
 234         echo "Checking cache download in $cache/rootfs ... "
 235         if [ ! -e "$cache/rootfs" ]; then
 236             download_altlinux
 237             if [ $? -ne 0 ]; then
 238                 echo "Failed to download 'altlinux base'"
 239                 return 1
 240             fi
 241         else
 242             echo "Cache found. Updating..."
 243             update_altlinux
 244             if [ $? -ne 0 ]; then
 245                 echo "Failed to update 'altlinux base', continuing with last known good cache"
 246             else
 247                 echo "Update finished"
 248             fi
 249         fi
 250
 251         echo "Copy $cache/rootfs to $rootfs_path ... "
 252         copy_altlinux
 253         if [ $? -ne 0 ]; then
 254             echo "Failed to copy rootfs"
 255             return 1
 256         fi
 257         return 0
 258     ) 9>@LOCALSTATEDIR@/lock/subsys/lxc-altlinux
 259
 260     return $?
 261 }
 262
 263 copy_configuration()
 264 {
 265
 266     mkdir -p $config_path
 267     grep -q "^lxc.rootfs" $config_path/config 2>/dev/null || echo "lxc.rootfs = $rootfs_path" >> $config_path/config
 268     cat <<EOF >> $config_path/config
 269 lxc.utsname = $name
 270 lxc.tty = 4
 271 lxc.pts = 1024
 272 lxc.cap.drop = sys_module mac_admin mac_override sys_time
 273
 274 # When using LXC with apparmor, uncomment the next line to run unconfined:
 275 #lxc.aa_profile = unconfined
 276
 277 #networking
 278 #lxc.network.type = $lxc_network_type
 279 #lxc.network.flags = up
 280 #lxc.network.link = $lxc_network_link
 281 #lxc.network.name = veth0
 282 #lxc.network.mtu = 1500
 283 EOF
 284 if [ ! -z ${ipv4} ]; then
 285     cat <<EOF >> $config_path/config
 286 lxc.network.ipv4 = $ipv4
 287 EOF
 288 fi
 289 if [ ! -z ${gw} ]; then
 290     cat <<EOF >> $config_path/config
 291 lxc.network.ipv4.gateway = $gw
 292 EOF
 293 fi
 294 if [ ! -z ${ipv6} ]; then
 295     cat <<EOF >> $config_path/config
 296 lxc.network.ipv6 = $ipv6
 297 EOF
 298 fi
 299 if [ ! -z ${gw6} ]; then
 300     cat <<EOF >> $config_path/config
 301 lxc.network.ipv6.gateway = $gw6
 302 EOF
 303 fi
 304     cat <<EOF >> $config_path/config
 305 #cgroups
 306 lxc.cgroup.devices.deny = a
 307 # /dev/null and zero
 308 lxc.cgroup.devices.allow = c 1:3 rwm
 309 lxc.cgroup.devices.allow = c 1:5 rwm
 310 # consoles
 311 lxc.cgroup.devices.allow = c 5:1 rwm
 312 lxc.cgroup.devices.allow = c 5:0 rwm
 313 lxc.cgroup.devices.allow = c 4:0 rwm
 314 lxc.cgroup.devices.allow = c 4:1 rwm
 315 # /dev/{,u}random
 316 lxc.cgroup.devices.allow = c 1:9 rwm
 317 lxc.cgroup.devices.allow = c 1:8 rwm
 318 lxc.cgroup.devices.allow = c 136:* rwm
 319 lxc.cgroup.devices.allow = c 5:2 rwm
 320 # rtc
 321 lxc.cgroup.devices.allow = c 10:135 rwm
 322
 323 lxc.mount.auto = cgroup:mixed proc:mixed sys:mixed
 324 EOF
 325
 326     if [ $? -ne 0 ]; then
 327         echo "Failed to add configuration"
 328         return 1
 329     fi
 330
 331     return 0
 332 }
 333
 334 clean()
 335 {
 336
 337     if [ ! -e $cache ]; then
 338         exit 0
 339     fi
 340
 341     # lock, so we won't purge while someone is creating a repository
 342     (
 343         flock -x 9
 344         if [ $? != 0 ]; then
 345             echo "Cache repository is busy."
 346             exit 1
 347         fi
 348
 349         echo -n "Purging the download cache for ALTLinux-$release..."
 350         rm --preserve-root --one-file-system -rf $cache && echo "Done." || exit 1
 351         exit 0
 352     ) 9>@LOCALSTATEDIR@/lock/subsys/lxc-altlinux
 353 }
 354
 355 usage()
 356 {
 357     cat <<EOF
 358 usage:
 359     $1 -n|--name=<container_name>
 360         [-p|--path=<path>] [-c|--clean] [-R|--release=<ALTLinux_release>]
 361         [-4|--ipv4=<ipv4 address>] [-6|--ipv6=<ipv6 address>]
 362         [-g|--gw=<gw address>] [-d|--dns=<dns address>]
 363         [-P|--profile=<name of the profile>] [--rootfs=<path>]
 364         [-A|--arch=<arch of the container>]
 365         [-h|--help]
 366 Mandatory args:
 367   -n,--name         container name, used to as an identifier for that container from now on
 368 Optional args:
 369   -p,--path         path to where the container rootfs will be created, defaults to @LXCPATH@. The container config will go under @LXCPATH@ in that case
 370   -c,--clean        clean the cache
 371   -R,--release      ALTLinux release for the new container. if the host is ALTLinux, then it will defaultto the host's release.
 372   -4,--ipv4         specify the ipv4 address to assign to the virtualized interface, eg. 192.168.1.123/24
 373   -6,--ipv6         specify the ipv6 address to assign to the virtualized interface, eg. 2003:db8:1:0:214:1234:fe0b:3596/64
 374   -g,--gw           specify the default gw, eg. 192.168.1.1
 375   -G,--gw6          specify the default gw, eg. 2003:db8:1:0:214:1234:fe0b:3596
 376   -d,--dns          specify the DNS server, eg. 192.168.1.2
 377   -P,--profile      Profile name is the file name in /etc/lxc/profiles contained packages name for install to cache.
 378   -A,--arch         NOT USED YET. Define what arch the container will be [i686,x86_64]
 379   ---rootfs         rootfs path
 380   -h,--help         print this help
 381 EOF
 382     return 0
 383 }
 384
 385 options=$(getopt -o hp:n:P:cR:4:6:g:d: -l help,rootfs:,path:,name:,profile:,clean,release:,ipv4:,ipv6:,gw:,dns: -- "$@")
 386 if [ $? -ne 0 ]; then
 387     usage $(basename $0)
 388     exit 1
 389 fi
 390 eval set -- "$options"
 391
 392 while true
 393 do
 394     case "$1" in
 395         -h|--help)      usage $0 && exit 0;;
 396         -p|--path)      path=$2; shift 2;;
 397         --rootfs)       rootfs_path=$2; shift 2;;
 398         -n|--name)      name=$2; shift 2;;
 399         -P|--profile)   profile=$2; shift 2;;
 400         -c|--clean)     clean=1; shift 1;;
 401         -R|--release)   release=$2; shift 2;;
 402         -4|--ipv4)      ipv4=$2; shift 2;;
 403         -6|--ipv6)      ipv6=$2; shift 2;;
 404         -g|--gw)        gw=$2; shift 2;;
 405         -d|--dns)       dns=$2; shift 2;;
 406         --)             shift 1; break ;;
 407         *)              break ;;
 408     esac
 409 done
 410
 411 if [ ! -z "$clean" -a -z "$path" ]; then
 412     clean || exit 1
 413     exit 0
 414 fi
 415
 416 type apt-get >/dev/null 2>&1
 417 if [ $? -ne 0 ]; then
 418     echo "'apt-get' command is missing"
 419     exit 1
 420 fi
 421
 422 if [ -z "$path" ]; then
 423     path=$default_path
 424 fi
 425
 426 if [ -z "$profile" ]; then
 427     profile=$default_profile
 428 fi
 429
 430 if [ -z "$release" ]; then
 431     if [ "$is_altlinux" ]; then
 432         release=$(cat /etc/altlinux-release |awk '/^ALT/ {print $3}')
 433     else
 434         echo "This is not a ALTLinux host and release missing, use -R|--release to specify release"
 435         exit 1
 436     fi
 437 fi
 438
 439 if [ -z "$ipv4" -a -z "$ipv6" ]; then
 440     BOOTPROTO="dhcp"
 441 else
 442     BOOTPROTO="static"
 443 fi
 444
 445 if [ "$(id -u)" != "0" ]; then
 446     echo "This script should be run as 'root'"
 447     exit 1
 448 fi
 449
 450 # check for 'lxc.rootfs' passed in through default config by lxc-create
 451 if [ -z "$rootfs_path" ]; then
 452     if grep -q '^lxc.rootfs' $path/config 2>/dev/null ; then
 453         rootfs_path=$(awk -F= '/^lxc.rootfs =/{ print $2 }' $path/config)
 454     else
 455         rootfs_path=$path/rootfs
 456     fi
 457 fi
 458
 459 config_path=$default_path/$name
 460 cache=$cache_base/$release/$profile
 461
 462 install_altlinux
 463 if [ $? -ne 0 ]; then
 464     echo "failed to install altlinux"
 465     exit 1
 466 fi
 467
 468 configure_altlinux
 469 if [ $? -ne 0 ]; then
 470     echo "failed to configure altlinux for a container"
 471     exit 1
 472 fi
 473
 474 copy_configuration
 475 if [ $? -ne 0 ]; then
 476     echo "failed write configuration file"
 477     exit 1
 478 fi
 479
 480 if [ ! -z "$clean" ]; then
 481     clean || exit 1
 482     exit 0
 483 fi
 484 echo "container rootfs and config created"
 485 echo "network configured as $lxc_network_type in the $lxc_network_link"