--- /dev/null
+#!/bin/bash
+
+#
+# template script for generating centos container for LXC
+
+#
+# lxc: linux Container library
+
+# Authors:
+# Daniel Lezcano <daniel.lezcano@free.fr>
+# Ramez Hanna <rhanna@informatiq.org>
+# Fajar A. Nugraha <github@fajar.net>
+# Michael H. Warfield <mhw@WittsEnd.com>
+
+# 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=$(arch)
+cache_base=@LOCALSTATEDIR@/cache/lxc/centos/$arch
+default_path=@LXCPATH@
+# We really need something better here!
+root_password=root
+
+lxc_network_type=veth
+lxc_network_link=lxcbr0
+
+# is this centos?
+# Alow for weird remixes like the Raspberry Pi
+#
+# Use the Mitre standard CPE identifier for the release ID if possible...
+# This may be in /etc/os-release or /etc/system-release-cpe. We
+# should be able to use EITHER. Give preference to /etc/os-release for now.
+
+if [ -e /etc/os-release ]
+then
+# This is a shell friendly configuration file. We can just source it.
+# What we're looking for in here is the ID, VERSION_ID and the CPE_NAME
+ . /etc/os-release
+ echo "Host CPE ID from /etc/os-release: ${CPE_NAME}"
+fi
+
+if [ "${CPE_NAME}" = "" -a -e /etc/system-release-cpe ]
+then
+ CPE_NAME=$(head -n1 /etc/system-release-cpe)
+ CPE_URI=$(expr ${CPE_NAME} : '\([^:]*:[^:*]\)')
+ if [ "${CPE_URI}" != "cpe:/o" ]
+ then
+ CPE_NAME=
+ else
+ echo "Host CPE ID from /etc/system-release-cpe: ${CPE_NAME}"
+ # Probably a better way to do this but sill remain posix
+ # compatible but this works, shrug...
+ # Must be nice and not introduce convenient bashisms here.
+ ID=$(expr ${CPE_NAME} : '[^:]*:[^:]*:[^:]*:\([^:]*\)')
+ VERSION_ID=$(expr ${CPE_NAME} : '[^:]*:[^:]*:[^:]*:[^:]*:\([^:]*\)')
+ fi
+fi
+
+if [ "${CPE_NAME}" != "" -a "${ID}" = "centos" -a "${VERSION_ID}" != "" ]
+then
+ centos_host_ver=${VERSION_ID}
+ is_centos=true
+elif [ -e /etc/redhat-release ]
+then
+ # Only if all other methods fail, try to parse the redhat-release file.
+ centos_host_ver=$( sed -e '/^CentOS /!d' -e 's/CentOS*\srelease\s*\([0-9][0-9]*\)\s.*/\1/' < /etc/redhat-release )
+ if [ "$centos_host_ver" != "" ]
+ then
+ is_centos=true
+ fi
+fi
+
+# Map a few architectures to their generic Centos repository archs.
+#
+# CentOS currently doesn't support ARM but it's copied here from
+# the Fedora template for completeness and that it will in the future.
+#
+# The two ARM archs are a bit of a guesstimate for the v5 and v6
+# archs. V6 should have hardware floating point (Rasberry Pi).
+# The "arm" arch is safer (no hardware floating point). So
+# there may be cases where we "get it wrong" for some v6 other
+# than RPi.
+case "$arch" in
+i686) arch=i386 ;;
+armv3l|armv4l|armv5l) arch=arm ;;
+armv6l|armv7l|armv8l) arch=armhfp ;;
+esac
+
+force_mknod()
+{
+ # delete a device node if exists, and create a new one
+ rm -f $2 && mknod -m $1 $2 $3 $4 $5
+}
+
+configure_centos()
+{
+
+ # disable selinux in centos
+ mkdir -p $rootfs_path/selinux
+ echo 0 > $rootfs_path/selinux/enforce
+
+ # Also kill it in the /etc/selinux/config file if it's there...
+ if [[ -f $rootfs_path/etc/selinux/config ]]
+ then
+ sed -i '/^SELINUX=/s/.*/SELINUX=disabled/' $rootfs_path/etc/selinux/config
+ fi
+
+ # Nice catch from Dwight Engen in the Oracle template.
+ # Wantonly plagerized here with much appreciation.
+ if [ -f $rootfs_path/usr/sbin/selinuxenabled ]; then
+ mv $rootfs_path/usr/sbin/selinuxenabled $rootfs_path/usr/sbin/selinuxenabled.lxcorig
+ ln -s /bin/false $rootfs_path/usr/sbin/selinuxenabled
+ fi
+
+ # This is a known problem and documented in RedHat bugzilla as relating
+ # to a problem with auditing enabled. This prevents an error in
+ # the container "Cannot make/remove an entry for the specified session"
+ sed -i '/^session.*pam_loginuid.so/s/^session/# session/' ${rootfs_path}/etc/pam.d/login
+ sed -i '/^session.*pam_loginuid.so/s/^session/# session/' ${rootfs_path}/etc/pam.d/sshd
+
+ # configure the network using the dhcp
+ cat <<EOF > ${rootfs_path}/etc/sysconfig/network-scripts/ifcfg-eth0
+DEVICE=eth0
+BOOTPROTO=dhcp
+ONBOOT=yes
+HOSTNAME=${UTSNAME}
+NM_CONTROLLED=no
+TYPE=Ethernet
+MTU=${MTU}
+EOF
+
+ # set the hostname
+ cat <<EOF > ${rootfs_path}/etc/sysconfig/network
+NETWORKING=yes
+HOSTNAME=${UTSNAME}
+EOF
+
+ # set minimal hosts
+ cat <<EOF > $rootfs_path/etc/hosts
+127.0.0.1 localhost $name
+EOF
+
+ # set minimal fstab
+ cat <<EOF > $rootfs_path/etc/fstab
+/dev/root / rootfs defaults 0 0
+none /dev/shm tmpfs nosuid,nodev 0 0
+EOF
+
+ # create lxc compatibility init script
+ if [ "$release" = "6" ]; then
+ cat <<EOF > $rootfs_path/etc/init/lxc-sysinit.conf
+start on startup
+env container
+
+pre-start script
+ if [ "x$container" != "xlxc" -a "x$container" != "xlibvirt" ]; then
+ stop;
+ fi
+ initctl start tty TTY=console
+ rm -f /var/lock/subsys/*
+ rm -f /var/run/*.pid
+ telinit 3
+ exit 0;
+end script
+EOF
+ elif [ "$release" = "5" ]; then
+ cat <<EOF > $rootfs_path/etc/rc.d/lxc.sysinit
+#! /bin/bash
+rm -f /etc/mtab /var/run/*.{pid,lock} /var/lock/subsys/*
+rm -rf {/,/var}/tmp/*
+echo "/dev/root / rootfs defaults 0 0" > /etc/mtab
+exit 0
+EOF
+ chmod 755 $rootfs_path/etc/rc.d/lxc.sysinit
+ sed -i 's|si::sysinit:/etc/rc.d/rc.sysinit|si::bootwait:/etc/rc.d/lxc.sysinit|' $rootfs_path/etc/inittab
+ sed -i 's|^1:|co:2345:respawn:/sbin/mingetty console\n1:|' $rootfs_path/etc/inittab
+ sed -i 's|^\([56]:\)|#\1|' $rootfs_path/etc/inittab
+ fi
+
+ dev_path="${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 666 ${dev_path}/random c 1 8
+ mknod -m 666 ${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
+ mknod -m 666 ${dev_path}/tty0 c 4 0
+ mknod -m 666 ${dev_path}/tty1 c 4 1
+ mknod -m 666 ${dev_path}/tty2 c 4 2
+ mknod -m 666 ${dev_path}/tty3 c 4 3
+ mknod -m 666 ${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
+
+ echo "setting root passwd to $root_password"
+ echo "root:$root_password" | chroot $rootfs_path chpasswd
+
+ # This will need to be enhanced for CentOS 7 when systemd
+ # comes into play... /\/\|=mhw=|\/\/
+
+ return 0
+}
+
+configure_centos_init()
+{
+ sed -i 's|.sbin.start_udev||' ${rootfs_path}/etc/rc.sysinit
+ sed -i 's|.sbin.start_udev||' ${rootfs_path}/etc/rc.d/rc.sysinit
+ if [ "$release" = "6" ]; then
+ chroot ${rootfs_path} chkconfig udev-post off
+ fi
+ chroot ${rootfs_path} chkconfig network on
+}
+
+download_centos()
+{
+
+ # check the mini centos was not already downloaded
+ INSTALL_ROOT=$cache/partial
+ mkdir -p $INSTALL_ROOT
+ if [ $? -ne 0 ]; then
+ echo "Failed to create '$INSTALL_ROOT' directory"
+ return 1
+ fi
+
+ # download a mini centos into a cache
+ echo "Downloading centos minimal ..."
+ YUM="yum --installroot $INSTALL_ROOT -y --nogpgcheck"
+ PKG_LIST="yum initscripts passwd rsyslog vim-minimal openssh-server openssh-clients dhclient chkconfig rootfiles policycoreutils"
+
+ # use temporary repository definition
+ REPO_FILE=$INSTALL_ROOT/etc/yum.repos.d/lxc-centos-temp.repo
+ mkdir -p $(dirname $REPO_FILE)
+ cat <<EOF > $REPO_FILE
+[base]
+name=CentOS-$release - Base
+mirrorlist=http://mirrorlist.centos.org/?release=$release&arch=$arch&repo=os
+
+[updates]
+name=CentOS-$release - Updates
+mirrorlist=http://mirrorlist.centos.org/?release=$release&arch=$arch&repo=updates
+EOF
+
+ # create minimal device nodes, needed for "yum install" and "yum update" process
+ mkdir -p $INSTALL_ROOT/dev
+ force_mknod 666 $INSTALL_ROOT/dev/null c 1 3
+ force_mknod 666 $INSTALL_ROOT/dev/urandom c 1 9
+
+ $YUM install $PKG_LIST
+
+ if [ $? -ne 0 ]; then
+ echo "Failed to download the rootfs, aborting."
+ return 1
+ fi
+
+ # use same nameservers as hosts, needed for "yum update later"
+ cp /etc/resolv.conf $INSTALL_ROOT/etc/
+
+ # check whether rpmdb is under $HOME
+ if [ ! -e $INSTALL_ROOT/var/lib/rpm/Packages -a -e $INSTALL_ROOT/$HOME/.rpmdb/Packages ]; then
+ echo "Fixing rpmdb location ..."
+ mv $INSTALL_ROOT/$HOME/.rpmdb/[A-Z]* $INSTALL_ROOT/var/lib/rpm/
+ rm -rf $INSTALL_ROOT/$HOME/.rpmdb
+ chroot $INSTALL_ROOT rpm --rebuilddb 2>/dev/null
+ fi
+
+ # check whether rpmdb version is correct
+ chroot $INSTALL_ROOT rpm --quiet -q yum 2>/dev/null
+ ret=$?
+
+ # if "rpm -q" doesn't work due to rpmdb version difference,
+ # then we need to redo the process using the newly-installed yum
+ if [ $ret -gt 0 ]; then
+ echo "Reinstalling packages ..."
+ mv $REPO_FILE $REPO_FILE.tmp
+ mkdir $INSTALL_ROOT/etc/yum.repos.disabled
+ mv $INSTALL_ROOT/etc/yum.repos.d/*.repo $INSTALL_ROOT/etc/yum.repos.disabled/
+ mv $REPO_FILE.tmp $REPO_FILE
+ mkdir -p $INSTALL_ROOT/$INSTALL_ROOT/etc
+ cp /etc/resolv.conf $INSTALL_ROOT/$INSTALL_ROOT/etc/
+ mkdir -p $INSTALL_ROOT/$INSTALL_ROOT/dev
+ mknod -m 666 $INSTALL_ROOT/$INSTALL_ROOT/dev/null c 1 3
+ mknod -m 666 $INSTALL_ROOT/$INSTALL_ROOT/dev/urandom c 1 9
+ mkdir -p $INSTALL_ROOT/$INSTALL_ROOT/var/cache/yum
+ cp -al $INSTALL_ROOT/var/cache/yum/* $INSTALL_ROOT/$INSTALL_ROOT/var/cache/yum/
+ chroot $INSTALL_ROOT $YUM install $PKG_LIST
+ if [ $? -ne 0 ]; then
+ echo "Failed to download the rootfs, aborting."
+ return 1
+ fi
+ mv $INSTALL_ROOT/$INSTALL_ROOT $INSTALL_ROOT.tmp
+ rm -rf $INSTALL_ROOT
+ mv $INSTALL_ROOT.tmp $INSTALL_ROOT
+ fi
+
+ rm -f $REPO_FILE
+ rm -rf $INSTALL_ROOT/var/cache/yum/*
+
+ mv "$INSTALL_ROOT" "$cache/rootfs"
+ echo "Download complete."
+
+ return 0
+}
+
+copy_centos()
+{
+
+ # make a local copy of the mini centos
+ 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_centos()
+{
+ YUM="chroot $cache/rootfs yum -y --nogpgcheck"
+ $YUM update
+ if [ $? -ne 0 ]; then
+ return 1
+ fi
+ $YUM clean packages
+}
+
+install_centos()
+{
+ 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_centos
+ if [ $? -ne 0 ]; then
+ echo "Failed to download 'centos base'"
+ return 1
+ fi
+ else
+ echo "Cache found. Updating..."
+ update_centos
+ if [ $? -ne 0 ]; then
+ echo "Failed to update 'centos base', continuing with last known good cache"
+ else
+ echo "Update finished"
+ fi
+ fi
+
+ echo "Copy $cache/rootfs to $rootfs_path ... "
+ copy_centos
+ 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
+ cat <<EOF >> $config_path/config
+lxc.utsname = $utsname
+lxc.tty = 4
+lxc.pts = 1024
+lxc.rootfs = $rootfs_path
+lxc.mount = $config_path/fstab
+lxc.cap.drop = sys_module mac_admin mac_override sys_time
+
+lxc.autodev = $auto_dev
+
+# example simple networking setup, uncomment to enable
+#lxc.network.type = $lxc_network_type
+#lxc.network.flags = up
+#lxc.network.link = $lxc_network_link
+#lxc.network.name = eth0
+# additional example for veth network type, static MAC address,
+# and persistent veth device name on host side
+#lxc.network.hwaddr = 00:16:3e:77:52:20
+#lxc.network.veth.pair = v-$name-e0
+
+#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 254:0 rwm
+EOF
+
+ cat <<EOF > $config_path/fstab
+proc proc proc nodev,noexec,nosuid 0 0
+devpts dev/pts devpts defaults 0 0
+sysfs 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 -x 200
+ if [ $? != 0 ]; then
+ echo "Cache repository is busy."
+ exit 1
+ fi
+
+ echo -n "Purging the download cache for centos-$release..."
+ rm --preserve-root --one-file-system -rf $cache && echo "Done." || exit 1
+ exit 0
+
+ ) 200>/var/lock/subsys/lxc
+}
+
+usage()
+{
+ cat <<EOF
+usage:
+ $1 -n|--name=<container_name>
+ [-p|--path=<path>] [-c|--clean] [-R|--release=<CentOS_release>] [-A|--arch=<arch of the container>]
+ [-h|--help]
+Mandatory args:
+ -n,--name container name, used to as an identifier for that container from now on
+Optional args:
+ -p,--path path to where the container rootfs will be created, defaults to /var/lib/lxc. The container config will go under /var/lib/lxc in that case
+ -c,--clean clean the cache
+ -R,--release Centos release for the new container. if the host is Centos, then it will defaultto the host's release.
+ --fqdn fully qualified domain name (FQDN) for DNS and system naming
+ -A,--arch NOT USED YET. Define what arch the container will be [i686,x86_64]
+ -h,--help print this help
+EOF
+ return 0
+}
+
+options=$(getopt -o hp:n:cR: -l help,path:,rootfs:,name:,clean,release:,fqdn: -- "$@")
+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;;
+ --rootfs) rootfs=$2; shift 2;;
+ -n|--name) name=$2; shift 2;;
+ -c|--clean) clean=$2; shift 2;;
+ -R|--release) release=$2; shift 2;;
+ --fqdn) utsname=$2; shift 2;;
+ --) shift 1; break ;;
+ *) break ;;
+ esac
+done
+
+if [ ! -z "$clean" -a -z "$path" ]; then
+ clean || exit 1
+ exit 0
+fi
+
+if [ -z "${utsname}" ]; then
+ utsname=${name}
+fi
+
+# This follows a standard "resolver" convention that an FQDN must have
+# at least two dots or it is considered a local relative host name.
+# If it doesn't, append the dns domain name of the host system.
+#
+# This changes one significant behavior when running
+# "lxc_create -n Container_Name" without using the
+# --fqdn option.
+#
+# Old behavior:
+# utsname and hostname = Container_Name
+# New behavior:
+# utsname and hostname = Container_Name.Domain_Name
+
+if [ $(expr "$utsname" : '.*\..*\.') = 0 ]; then
+ if [ -n "$(dnsdomainname)" ]; then
+ utsname=${utsname}.$(dnsdomainname)
+ fi
+fi
+
+type yum >/dev/null 2>&1
+if [ $? -ne 0 ]; then
+ echo "'yum' command is missing"
+ exit 1
+fi
+
+if [ -z "$path" ]; then
+ path=$default_path/$name
+fi
+
+if [ -z "$release" ]; then
+ if [ "$is_centos" -a "$centos_host_ver" ]; then
+ release=$centos_host_ver
+ else
+ echo "This is not a centos host and release missing, defaulting to 6 use -R|--release to specify release"
+ release=6
+ fi
+fi
+
+# CentOS 7 and above should run systemd. We need autodev enabled to keep
+# systemd from causing problems.
+if [ $release -gt 6 ]; then
+ auto_dev="1"
+else
+ auto_dev="0"
+fi
+
+if [ "$(id -u)" != "0" ]; then
+ echo "This script should be run as 'root'"
+ exit 1
+fi
+
+
+if [ -z "$rootfs_path" ]; then
+ rootfs_path=$path/rootfs
+ # 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 $2 }'`
+ fi
+fi
+config_path=$default_path/$name
+cache=$cache_base/$release
+
+revert()
+{
+ echo "Interrupted, so cleaning up"
+ lxc-destroy -n $name
+ # maybe was interrupted before copy config
+ rm -rf $path
+ rm -rf $default_path/$name
+ echo "exiting..."
+ exit 1
+}
+
+trap revert SIGHUP SIGINT SIGTERM
+
+copy_configuration
+if [ $? -ne 0 ]; then
+ echo "failed write configuration file"
+ exit 1
+fi
+
+install_centos
+if [ $? -ne 0 ]; then
+ echo "failed to install centos"
+ exit 1
+fi
+
+configure_centos
+if [ $? -ne 0 ]; then
+ echo "failed to configure centos for a container"
+ exit 1
+fi
+
+configure_centos_init
+
+if [ ! -z $clean ]; then
+ clean || exit 1
+ exit 0
+fi
+echo "container rootfs and config created, default root password is '$root_password'"
+echo "edit the config file to check/enable networking setup"
projects / thirdparty / lxc.git / commitdiff
