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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  26
  27 #Configurations
  28 arch=$(arch)
  29 cache_base=/var/cache/lxc/altlinux/$arch
  30 default_path=@LXCPATH@
  31 default_profile=default
  32 profile_dir=/etc/lxc/profiles
  33 root_password=rooter
  34 lxc_network_type=veth
  35 lxc_network_link=virbr0
  36
  37 # is this altlinux?
  38 [ -f /etc/altlinux-release ] && is_altlinux=true
  39
  40 configure_altlinux()
  41 {
  42
  43     # disable selinux in altlinux
  44     mkdir -p $rootfs_path/selinux
  45     echo 0 > $rootfs_path/selinux/enforce
  46
  47     mkdir -p ${rootfs_path}/etc/net/ifaces/veth0
  48     cat <<EOF > ${rootfs_path}/etc/net/ifaces/veth0/options
  49 BOOTPROTO=${BOOTPROTO}
  50 ONBOOT=yes
  51 NM_CONTROLLED=no
  52 TYPE=eth
  53 EOF
  54
  55 if [ ${BOOTPROTO} != "dhcp" ]; then
  56     # ip address
  57     cat <<EOF > ${rootfs_path}/etc/net/ifaces/veth0/ipv4address
  58 ${ipv4}
  59 EOF
  60
  61     cat <<EOF > ${rootfs_path}/etc/net/ifaces/veth0/ipv4route
  62 ${gw}
  63 EOF
  64
  65     cat <<EOF > ${rootfs_path}/etc/net/ifaces/veth0/resolv.conf
  66 nameserver ${dns}
  67 EOF
  68
  69     cat <<EOF > ${rootfs_path}/etc/net/ifaces/veth0/ipv6address
  70 ${ipv6}
  71 EOF
  72
  73     cat <<EOF > ${rootfs_path}/etc/net/ifaces/veth0/ipv6route
  74 ${gw6}
  75 EOF
  76
  77 fi
  78
  79     # set the hostname
  80     cat <<EOF > ${rootfs_path}/etc/sysconfig/network
  81 NETWORKING=yes
  82 CONFMETHOD=etcnet
  83 HOSTNAME=${UTSNAME}
  84 RESOLV_MODS=yes
  85 EOF
  86
  87     # set minimal hosts
  88     cat <<EOF > $rootfs_path/etc/hosts
  89 127.0.0.1 localhost.localdomain localhost $name
  90 EOF
  91     # Allow to login at virsh console. loginuid.so doen't work in the absence of auditd.
  92 #    sed -i 's/^.*loginuid.so.*$/\#&/' ${rootfs_path}/etc/pam.d/common-login
  93
  94     # Allow root to login at virsh console
  95     echo "pts/0" >> ${rootfs_path}/etc/securetty
  96     echo "console" >> ${rootfs_path}/etc/securetty
  97
  98     chroot ${rootfs_path} chkconfig network on
  99     chroot ${rootfs_path} chkconfig syslogd on
 100     chroot ${rootfs_path} chkconfig random on
 101     chroot ${rootfs_path} chkconfig rawdevices off
 102     chroot ${rootfs_path} chkconfig fbsetfont off
 103 #    chroot ${rootfs_path} chkconfig keytable off
 104
 105     subst 's/^\([3-9]\+:[0-9]\+:respawn:\/sbin\/mingetty.*\)/#\1/' ${rootfs_path}/etc/inittab
 106     echo "c1:2345:respawn:/sbin/mingetty --noclear console" >>  ${rootfs_path}/etc/inittab
 107     subst 's,\/dev\/tty12,/var/log/syslog/console,' ${rootfs_path}/etc/syslog.conf
 108
 109 #   touch file for fastboot
 110     touch ${rootfs_path}/fastboot
 111     chattr +i ${rootfs_path}/fastboot
 112
 113     dev_path="${rootfs_path}/dev"
 114     rm -rf ${dev_path}
 115     mkdir -p ${dev_path}
 116     mknod -m 666 ${dev_path}/null c 1 3
 117     mknod -m 666 ${dev_path}/zero c 1 5
 118     mknod -m 644 ${dev_path}/random c 1 8
 119     mknod -m 644 ${dev_path}/urandom c 1 9
 120     mkdir -m 755 ${dev_path}/pts
 121     mkdir -m 1777 ${dev_path}/shm
 122     mknod -m 666 ${dev_path}/tty c 5 0
 123     chown root:tty ${dev_path}/tty
 124     mknod -m 600 ${dev_path}/tty0 c 4 0
 125     mknod -m 600 ${dev_path}/tty1 c 4 1
 126     mknod -m 600 ${dev_path}/tty2 c 4 2
 127     mknod -m 600 ${dev_path}/tty3 c 4 3
 128     mknod -m 600 ${dev_path}/tty4 c 4 4
 129     mknod -m 600 ${dev_path}/console c 5 1
 130     mknod -m 666 ${dev_path}/full c 1 7
 131     mknod -m 600 ${dev_path}/initctl p
 132     mknod -m 666 ${dev_path}/ptmx c 5 2
 133     chown root:tty ${dev_path}/ptmx
 134     ln -s /proc/self/fd ${dev_path}/fd
 135     ln -s /proc/kcore ${dev_path}/core
 136     mkdir -m 755 ${dev_path}/mapper
 137     mknod -m 600 ${dev_path}/mapper/control c 10 236
 138     mkdir -m 755 ${dev_path}/net
 139     mknod -m 666 ${dev_path}/net/tun c 10 200
 140
 141     echo "setting root passwd to $root_password"
 142     echo "root:$root_password" | chroot $rootfs_path chpasswd
 143
 144     return 0
 145 }
 146
 147 download_altlinux()
 148 {
 149
 150     # check the mini altlinux was not already downloaded
 151     INSTALL_ROOT=$cache/partial
 152     mkdir -p $INSTALL_ROOT
 153     if [ $? -ne 0 ]; then
 154         echo "Failed to create '$INSTALL_ROOT' directory"
 155         return 1
 156     fi
 157
 158     # download a mini altlinux into a cache
 159     echo "Downloading altlinux minimal ..."
 160     APT_GET="apt-get -o RPM::RootDir=$INSTALL_ROOT -y"
 161     PKG_LIST="$(grep -hs '^[^#]' "$profile_dir/$profile")"
 162 #    PKG_LIST="basesystem apt apt-conf-sisyphus etcnet openssh-server passwd sysklogd net-tools e2fsprogs"
 163
 164     mkdir -p $INSTALL_ROOT/var/lib/rpm
 165     rpm --root $INSTALL_ROOT  --initdb
 166     $APT_GET install $PKG_LIST
 167
 168     if [ $? -ne 0 ]; then
 169         echo "Failed to download the rootfs, aborting."
 170         return 1
 171     fi
 172
 173     mv "$INSTALL_ROOT" "$cache/rootfs"
 174     echo "Download complete."
 175
 176     return 0
 177 }
 178
 179 copy_altlinux()
 180 {
 181
 182     # make a local copy of the minialtlinux
 183     echo -n "Copying rootfs to $rootfs_path ..."
 184     #cp -a $cache/rootfs-$arch $rootfs_path || return 1
 185     # i prefer rsync (no reason really)
 186     mkdir -p $rootfs_path
 187     rsync -a $cache/rootfs/ $rootfs_path/
 188     return 0
 189 }
 190
 191 update_altlinux()
 192 {
 193     chroot $cache/rootfs apt-get update
 194     chroot $cache/rootfs apt-get -y dist-upgrade
 195 }
 196
 197 install_altlinux()
 198 {
 199     mkdir -p /var/lock/subsys/
 200     (
 201         flock -n -x 200
 202         if [ $? -ne 0 ]; then
 203             echo "Cache repository is busy."
 204             return 1
 205         fi
 206
 207         echo "Checking cache download in $cache/rootfs ... "
 208         if [ ! -e "$cache/rootfs" ]; then
 209             download_altlinux
 210             if [ $? -ne 0 ]; then
 211                 echo "Failed to download 'altlinux base'"
 212                 return 1
 213             fi
 214         else
 215             echo "Cache found. Updating..."
 216             update_altlinux
 217             if [ $? -ne 0 ]; then
 218                 echo "Failed to update 'altlinux base', continuing with last known good cache"
 219             else
 220                 echo "Update finished"
 221             fi
 222         fi
 223
 224         echo "Copy $cache/rootfs to $rootfs_path ... "
 225         copy_altlinux
 226         if [ $? -ne 0 ]; then
 227             echo "Failed to copy rootfs"
 228             return 1
 229         fi
 230
 231         return 0
 232
 233         ) 200>/var/lock/subsys/lxc
 234
 235     return $?
 236 }
 237
 238 copy_configuration()
 239 {
 240
 241     mkdir -p $config_path
 242     cat <<EOF >> $config_path/config
 243 lxc.utsname = $name
 244 lxc.tty = 4
 245 lxc.pts = 1024
 246 lxc.rootfs = $rootfs_path
 247 lxc.mount  = $config_path/fstab
 248 #networking
 249 lxc.network.type = $lxc_network_type
 250 lxc.network.flags = up
 251 lxc.network.link = $lxc_network_link
 252 lxc.network.name = veth0
 253 lxc.network.mtu = 1500
 254 EOF
 255 if [ ! -z ${ipv4} ]; then
 256     cat <<EOF >> $config_path/config
 257 lxc.network.ipv4 = $ipv4
 258 EOF
 259 fi
 260 if [ ! -z ${gw} ]; then
 261     cat <<EOF >> $config_path/config
 262 lxc.network.ipv4.gateway = $gw
 263 EOF
 264 fi
 265 if [ ! -z ${ipv6} ]; then
 266     cat <<EOF >> $config_path/config
 267 lxc.network.ipv6 = $ipv6
 268 EOF
 269 fi
 270 if [ ! -z ${gw6} ]; then
 271     cat <<EOF >> $config_path/config
 272 lxc.network.ipv6.gateway = $gw6
 273 EOF
 274 fi
 275     cat <<EOF >> $config_path/config
 276 #cgroups
 277 lxc.cgroup.devices.deny = a
 278 # /dev/null and zero
 279 lxc.cgroup.devices.allow = c 1:3 rwm
 280 lxc.cgroup.devices.allow = c 1:5 rwm
 281 # consoles
 282 lxc.cgroup.devices.allow = c 5:1 rwm
 283 lxc.cgroup.devices.allow = c 5:0 rwm
 284 lxc.cgroup.devices.allow = c 4:0 rwm
 285 lxc.cgroup.devices.allow = c 4:1 rwm
 286 # /dev/{,u}random
 287 lxc.cgroup.devices.allow = c 1:9 rwm
 288 lxc.cgroup.devices.allow = c 1:8 rwm
 289 lxc.cgroup.devices.allow = c 136:* rwm
 290 lxc.cgroup.devices.allow = c 5:2 rwm
 291 # rtc
 292 lxc.cgroup.devices.allow = c 10:135 rwm
 293 EOF
 294
 295     cat <<EOF > $config_path/fstab
 296 proc            $rootfs_path/proc         proc    nodev,noexec,nosuid 0 0
 297 sysfs           $rootfs_path/sys          sysfs defaults  0 0
 298 EOF
 299
 300     if [ $? -ne 0 ]; then
 301         echo "Failed to add configuration"
 302         return 1
 303     fi
 304
 305     return 0
 306 }
 307
 308 clean()
 309 {
 310
 311     if [ ! -e $cache ]; then
 312         exit 0
 313     fi
 314
 315     # lock, so we won't purge while someone is creating a repository
 316     (
 317         flock -n -x 200
 318         if [ $? != 0 ]; then
 319             echo "Cache repository is busy."
 320             exit 1
 321         fi
 322
 323         echo -n "Purging the download cache for ALTLinux-$release..."
 324         rm --preserve-root --one-file-system -rf $cache && echo "Done." || exit 1
 325         exit 0
 326
 327     ) 200>/var/lock/subsys/lxc
 328 }
 329
 330 usage()
 331 {
 332     cat <<EOF
 333 usage:
 334     $1 -n|--name=<container_name>
 335         [-p|--path=<path>] [-c|--clean] [-R|--release=<ALTLinux_release>]
 336         [-4|--ipv4=<ipv4 address>] [-6|--ipv6=<ipv6 address>]
 337         [-g|--gw=<gw address>] [-d|--dns=<dns address>]
 338         [-P|--profile=<name of the profile>]
 339         [-A|--arch=<arch of the container>]
 340         [-h|--help]
 341 Mandatory args:
 342   -n,--name         container name, used to as an identifier for that container from now on
 343 Optional args:
 344   -p,--path         path to where the container rootfs will be created, defaults to /var/lib/lxc. The container config will go under /var/lib/lxc in and case
 345   -c,--clean        clean the cache
 346   -R,--release      ALTLinux release for the new container. if the host is ALTLinux, then it will defaultto the host's release.
 347   -4,--ipv4         specify the ipv4 address to assign to the virtualized interface, eg. 192.168.1.123/24
 348   -6,--ipv6         specify the ipv6 address to assign to the virtualized interface, eg. 2003:db8:1:0:214:1234:fe0b:3596/64
 349   -g,--gw           specify the default gw, eg. 192.168.1.1
 350   -G,--gw6          specify the default gw, eg. 2003:db8:1:0:214:1234:fe0b:3596
 351   -d,--dns          specify the DNS server, eg. 192.168.1.2
 352   -P,--profile      Profile name is the file name in /etc/lxc/profiles contained packages name for install to cache.
 353   -A,--arch         NOT USED YET. Define what arch the container will be [i686,x86_64]
 354   -h,--help         print this help
 355 EOF
 356     return 0
 357 }
 358
 359 options=$(getopt -o hp:n:P:cR:4:6:g:d: -l help,path:,name:,profile:,clean,release:ipv4:ipv6:gw:dns: -- "$@")
 360 if [ $? -ne 0 ]; then
 361     usage $(basename $0)
 362     exit 1
 363 fi
 364 eval set -- "$options"
 365
 366 while true
 367 do
 368     case "$1" in
 369         -h|--help)      usage $0 && exit 0;;
 370         -p|--path)      path=$2; shift 2;;
 371         -n|--name)      name=$2; shift 2;;
 372         -P|--profile)   profile=$2; shift 2;;
 373         -c|--clean)     clean=$2; shift 2;;
 374         -R|--release)   release=$2; shift 2;;
 375         -4|--ipv4)      ipv4=$2; shift 2;;
 376         -6|--ipv6)      ipv6=$2; shift 2;;
 377         -g|--gw)        gw=$2; shift 2;;
 378         -d|--dns)       dns=$2; shift 2;;
 379         --)             shift 1; break ;;
 380         *)              break ;;
 381     esac
 382 done
 383
 384 if [ ! -z "$clean" -a -z "$path" ]; then
 385     clean || exit 1
 386     exit 0
 387 fi
 388
 389 type apt-get >/dev/null 2>&1
 390 if [ $? -ne 0 ]; then
 391     echo "'apt-get' command is missing"
 392     exit 1
 393 fi
 394
 395 if [ -z "$path" ]; then
 396     path=$default_path
 397 fi
 398
 399 if [ -z "$profile" ]; then
 400     profile=$default_profile
 401 fi
 402
 403 if [ -z "$release" ]; then
 404     if [ "$is_altlinux" ]; then
 405         release=$(cat /etc/altlinux-release |awk '/^ALT/ {print $3}')
 406     else
 407         echo "This is not a ALTLinux host and release missing, use -R|--release to specify release"
 408         exit 1
 409     fi
 410 fi
 411
 412 if [ -z "$ipv4" -a -z "$ipv6" ]; then
 413     BOOTPROTO="dhcp"
 414 else
 415     BOOTPROTO="static"
 416 fi
 417
 418 if [ "$(id -u)" != "0" ]; then
 419     echo "This script should be run as 'root'"
 420     exit 1
 421 fi
 422
 423 rootfs_path=$path/$name/rootfs
 424 config_path=$default_path/$name
 425 cache=$cache_base/$release/$profile
 426
 427 if [ -f $config_path/config ]; then
 428     echo "A container with that name exists, chose a different name"
 429     exit 1
 430 fi
 431
 432 install_altlinux
 433 if [ $? -ne 0 ]; then
 434     echo "failed to install altlinux"
 435     exit 1
 436 fi
 437
 438 configure_altlinux
 439 if [ $? -ne 0 ]; then
 440     echo "failed to configure altlinux for a container"
 441     exit 1
 442 fi
 443
 444 copy_configuration
 445 if [ $? -ne 0 ]; then
 446     echo "failed write configuration file"
 447     exit 1
 448 fi
 449
 450 if [ ! -z $clean ]; then
 451     clean || exit 1
 452     exit 0
 453 fi
 454 echo "container rootfs and config created"
 455 echo "container is configured for lxc.network.type=veth and lxc.network.link=virbr0 (which is default if you have libvirt runnig)"