#!/bin/bash # # template script for generating altlinux container for LXC # # # lxc: linux Container library # Authors: # Alexey Shabalin # This library is free software; you can redistribute it and/or # modify it under the terms of the GNU Lesser General Public # License as published by the Free Software Foundation; either # version 2.1 of the License, or (at your option) any later version. # This library is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU # Lesser General Public License for more details. # You should have received a copy of the GNU Lesser General Public # License along with this library; if not, write to the Free Software # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA #Configurations arch=$(arch) cache_base=/var/cache/lxc/altlinux/$arch default_path=${localstatedir}/lib/lxc default_profile=default profile_dir=/etc/lxc/profiles root_password=rooter lxc_network_type=veth lxc_network_link=virbr0 # is this altlinux? [ -f /etc/altlinux-release ] && is_altlinux=true configure_altlinux() { # disable selinux in altlinux mkdir -p $rootfs_path/selinux echo 0 > $rootfs_path/selinux/enforce mkdir -p ${rootfs_path}/etc/net/ifaces/veth0 cat < ${rootfs_path}/etc/net/ifaces/veth0/options BOOTPROTO=${BOOTPROTO} ONBOOT=yes NM_CONTROLLED=no TYPE=eth EOF if [ ${BOOTPROTO} != "dhcp" ]; then # ip address cat < ${rootfs_path}/etc/net/ifaces/veth0/ipv4address ${ipv4} EOF cat < ${rootfs_path}/etc/net/ifaces/veth0/ipv4route ${gw} EOF cat < ${rootfs_path}/etc/net/ifaces/veth0/resolv.conf nameserver ${dns} EOF cat < ${rootfs_path}/etc/net/ifaces/veth0/ipv6address ${ipv6} EOF cat < ${rootfs_path}/etc/net/ifaces/veth0/ipv6route ${gw6} EOF fi # set the hostname cat < ${rootfs_path}/etc/sysconfig/network NETWORKING=yes CONFMETHOD=etcnet HOSTNAME=${UTSNAME} RESOLV_MODS=yes EOF # set minimal hosts cat < $rootfs_path/etc/hosts 127.0.0.1 localhost.localdomain localhost $name EOF # Allow to login at virsh console. loginuid.so doen't work in the absence of auditd. # sed -i 's/^.*loginuid.so.*$/\#&/' ${rootfs_path}/etc/pam.d/common-login # Allow root to login at virsh console echo "pts/0" >> ${rootfs_path}/etc/securetty echo "console" >> ${rootfs_path}/etc/securetty chroot ${rootfs_path} chkconfig network on chroot ${rootfs_path} chkconfig syslogd on chroot ${rootfs_path} chkconfig random on chroot ${rootfs_path} chkconfig rawdevices off chroot ${rootfs_path} chkconfig fbsetfont off # chroot ${rootfs_path} chkconfig keytable off subst 's/^\([3-9]\+:[0-9]\+:respawn:\/sbin\/mingetty.*\)/#\1/' ${rootfs_path}/etc/inittab echo "c1:2345:respawn:/sbin/mingetty --noclear console" >> ${rootfs_path}/etc/inittab subst 's,\/dev\/tty12,/var/log/syslog/console,' ${rootfs_path}/etc/syslog.conf # touch file for fastboot touch ${rootfs_path}/fastboot chattr +i ${rootfs_path}/fastboot dev_path="${rootfs_path}/dev" rm -rf ${dev_path} mkdir -p ${dev_path} mknod -m 666 ${dev_path}/null c 1 3 mknod -m 666 ${dev_path}/zero c 1 5 mknod -m 644 ${dev_path}/random c 1 8 mknod -m 644 ${dev_path}/urandom c 1 9 mkdir -m 755 ${dev_path}/pts mkdir -m 1777 ${dev_path}/shm mknod -m 666 ${dev_path}/tty c 5 0 chown root:tty ${dev_path}/tty mknod -m 600 ${dev_path}/tty0 c 4 0 mknod -m 600 ${dev_path}/tty1 c 4 1 mknod -m 600 ${dev_path}/tty2 c 4 2 mknod -m 600 ${dev_path}/tty3 c 4 3 mknod -m 600 ${dev_path}/tty4 c 4 4 mknod -m 600 ${dev_path}/console c 5 1 mknod -m 666 ${dev_path}/full c 1 7 mknod -m 600 ${dev_path}/initctl p mknod -m 666 ${dev_path}/ptmx c 5 2 chown root:tty ${dev_path}/ptmx ln -s /proc/self/fd ${dev_path}/fd ln -s /proc/kcore ${dev_path}/core mkdir -m 755 ${dev_path}/mapper mknod -m 600 ${dev_path}/mapper/control c 10 236 mkdir -m 755 ${dev_path}/net mknod -m 666 ${dev_path}/net/tun c 10 200 echo "setting root passwd to $root_password" echo "root:$root_password" | chroot $rootfs_path chpasswd return 0 } download_altlinux() { # check the mini altlinux was not already downloaded INSTALL_ROOT=$cache/partial mkdir -p $INSTALL_ROOT if [ $? -ne 0 ]; then echo "Failed to create '$INSTALL_ROOT' directory" return 1 fi # download a mini altlinux into a cache echo "Downloading altlinux minimal ..." APT_GET="apt-get -o RPM::RootDir=$INSTALL_ROOT -y" PKG_LIST="$(grep -hs '^[^#]' "$profile_dir/$profile")" # PKG_LIST="basesystem apt apt-conf-sisyphus etcnet openssh-server passwd sysklogd net-tools e2fsprogs" mkdir -p $INSTALL_ROOT/var/lib/rpm rpm --root $INSTALL_ROOT --initdb $APT_GET install $PKG_LIST if [ $? -ne 0 ]; then echo "Failed to download the rootfs, aborting." return 1 fi mv "$INSTALL_ROOT" "$cache/rootfs" echo "Download complete." return 0 } copy_altlinux() { # make a local copy of the minialtlinux echo -n "Copying rootfs to $rootfs_path ..." #cp -a $cache/rootfs-$arch $rootfs_path || return 1 # i prefer rsync (no reason really) mkdir -p $rootfs_path rsync -a $cache/rootfs/ $rootfs_path/ return 0 } update_altlinux() { chroot $cache/rootfs apt-get update chroot $cache/rootfs apt-get -y dist-upgrade } install_altlinux() { mkdir -p /var/lock/subsys/ ( flock -x 200 if [ $? -ne 0 ]; then echo "Cache repository is busy." return 1 fi echo "Checking cache download in $cache/rootfs ... " if [ ! -e "$cache/rootfs" ]; then download_altlinux if [ $? -ne 0 ]; then echo "Failed to download 'altlinux base'" return 1 fi else echo "Cache found. Updating..." update_altlinux if [ $? -ne 0 ]; then echo "Failed to update 'altlinux base', continuing with last known good cache" else echo "Update finished" fi fi echo "Copy $cache/rootfs to $rootfs_path ... " copy_altlinux if [ $? -ne 0 ]; then echo "Failed to copy rootfs" return 1 fi return 0 ) 200>/var/lock/subsys/lxc return $? } copy_configuration() { mkdir -p $config_path grep -q "^lxc.rootfs" $config_path/config 2>/dev/null || echo "lxc.rootfs = $rootfs_path" >> $config_path/config cat <> $config_path/config lxc.utsname = $name lxc.tty = 4 lxc.pts = 1024 lxc.mount = $config_path/fstab #networking lxc.network.type = $lxc_network_type lxc.network.flags = up lxc.network.link = $lxc_network_link lxc.network.name = veth0 lxc.network.mtu = 1500 EOF if [ ! -z ${ipv4} ]; then cat <> $config_path/config lxc.network.ipv4 = $ipv4 EOF fi if [ ! -z ${gw} ]; then cat <> $config_path/config lxc.network.ipv4.gateway = $gw EOF fi if [ ! -z ${ipv6} ]; then cat <> $config_path/config lxc.network.ipv6 = $ipv6 EOF fi if [ ! -z ${gw6} ]; then cat <> $config_path/config lxc.network.ipv6.gateway = $gw6 EOF fi cat <> $config_path/config #cgroups lxc.cgroup.devices.deny = a # /dev/null and zero lxc.cgroup.devices.allow = c 1:3 rwm lxc.cgroup.devices.allow = c 1:5 rwm # consoles lxc.cgroup.devices.allow = c 5:1 rwm lxc.cgroup.devices.allow = c 5:0 rwm lxc.cgroup.devices.allow = c 4:0 rwm lxc.cgroup.devices.allow = c 4:1 rwm # /dev/{,u}random lxc.cgroup.devices.allow = c 1:9 rwm lxc.cgroup.devices.allow = c 1:8 rwm lxc.cgroup.devices.allow = c 136:* rwm lxc.cgroup.devices.allow = c 5:2 rwm # rtc lxc.cgroup.devices.allow = c 10:135 rwm EOF cat < $config_path/fstab proc $rootfs_path/proc proc nodev,noexec,nosuid 0 0 sysfs $rootfs_path/sys sysfs defaults 0 0 EOF if [ $? -ne 0 ]; then echo "Failed to add configuration" return 1 fi return 0 } clean() { if [ ! -e $cache ]; then exit 0 fi # lock, so we won't purge while someone is creating a repository ( flock -n -x 200 if [ $? != 0 ]; then echo "Cache repository is busy." exit 1 fi echo -n "Purging the download cache for ALTLinux-$release..." rm --preserve-root --one-file-system -rf $cache && echo "Done." || exit 1 exit 0 ) 200>/var/lock/subsys/lxc } usage() { cat < [-p|--path=] [-c|--clean] [-R|--release=] [-4|--ipv4=] [-6|--ipv6=] [-g|--gw=] [-d|--dns=] [-P|--profile=] [-A|--arch=] [-h|--help] Mandatory args: -n,--name container name, used to as an identifier for that container from now on Optional args: -p,--path path to where the container rootfs will be created, defaults to /var/lib/lxc. The container config will go under /var/lib/lxc in and case -c,--clean clean the cache -R,--release ALTLinux release for the new container. if the host is ALTLinux, then it will defaultto the host's release. -4,--ipv4 specify the ipv4 address to assign to the virtualized interface, eg. 192.168.1.123/24 -6,--ipv6 specify the ipv6 address to assign to the virtualized interface, eg. 2003:db8:1:0:214:1234:fe0b:3596/64 -g,--gw specify the default gw, eg. 192.168.1.1 -G,--gw6 specify the default gw, eg. 2003:db8:1:0:214:1234:fe0b:3596 -d,--dns specify the DNS server, eg. 192.168.1.2 -P,--profile Profile name is the file name in /etc/lxc/profiles contained packages name for install to cache. -A,--arch NOT USED YET. Define what arch the container will be [i686,x86_64] -h,--help print this help EOF return 0 } options=$(getopt -o hp:n:P:cR:4:6:g:d: -l help,path:,name:,profile:,clean,release:ipv4:ipv6:gw:dns: -- "$@") if [ $? -ne 0 ]; then usage $(basename $0) exit 1 fi eval set -- "$options" while true do case "$1" in -h|--help) usage $0 && exit 0;; -p|--path) path=$2; shift 2;; -n|--name) name=$2; shift 2;; -P|--profile) profile=$2; shift 2;; -c|--clean) clean=$2; shift 2;; -R|--release) release=$2; shift 2;; -4|--ipv4) ipv4=$2; shift 2;; -6|--ipv6) ipv6=$2; shift 2;; -g|--gw) gw=$2; shift 2;; -d|--dns) dns=$2; shift 2;; --) shift 1; break ;; *) break ;; esac done if [ ! -z "$clean" -a -z "$path" ]; then clean || exit 1 exit 0 fi type apt-get >/dev/null 2>&1 if [ $? -ne 0 ]; then echo "'apt-get' command is missing" exit 1 fi if [ -z "$path" ]; then path=$default_path fi if [ -z "$profile" ]; then profile=$default_profile fi if [ -z "$release" ]; then if [ "$is_altlinux" ]; then release=$(cat /etc/altlinux-release |awk '/^ALT/ {print $3}') else echo "This is not a ALTLinux host and release missing, use -R|--release to specify release" exit 1 fi fi if [ -z "$ipv4" -a -z "$ipv6" ]; then BOOTPROTO="dhcp" else BOOTPROTO="static" fi if [ "$(id -u)" != "0" ]; then echo "This script should be run as 'root'" exit 1 fi rootfs_path=$path/$name/rootfs config_path=$default_path/$name cache=$cache_base/$release/$profile if [ -f $config_path/config ]; then echo "A container with that name exists, chose a different name" exit 1 fi # check for 'lxc.rootfs' passed in through default config by lxc-create if grep -q '^lxc.rootfs' $path/config 2>/dev/null ; then rootfs_path=`grep 'lxc.rootfs =' $path/config | awk -F= '{ print $2 }'` fi install_altlinux if [ $? -ne 0 ]; then echo "failed to install altlinux" exit 1 fi configure_altlinux if [ $? -ne 0 ]; then echo "failed to configure altlinux for a container" exit 1 fi copy_configuration if [ $? -ne 0 ]; then echo "failed write configuration file" exit 1 fi if [ ! -z $clean ]; then clean || exit 1 exit 0 fi echo "container rootfs and config created" echo "container is configured for lxc.network.type=veth and lxc.network.link=virbr0 (which is default if you have libvirt runnig)"