lxc-fedora.in revision b6e91b67178aa06eeae82bb09bd5eee2869689de
5b99af0079813347d90c935ea540ed7f96dcea38Stéphane Graber#!/bin/bash
5b99af0079813347d90c935ea540ed7f96dcea38Stéphane Graber
5b99af0079813347d90c935ea540ed7f96dcea38Stéphane Graber#
1609f0fbe1407e083f612a25475de2cb6b9954f7gza# template script for generating fedora container for LXC
cae3584efccc63f544c8748bd13d80e11bc79aefgza#
1609f0fbe1407e083f612a25475de2cb6b9954f7gza
cae3584efccc63f544c8748bd13d80e11bc79aefgza#
cae3584efccc63f544c8748bd13d80e11bc79aefgza# lxc: linux Container library
cae3584efccc63f544c8748bd13d80e11bc79aefgza
cae3584efccc63f544c8748bd13d80e11bc79aefgza# Authors:
bc19636d587fbabfbc2252f1bf4887fee87bb247Dennis Schridde# Daniel Lezcano <daniel.lezcano@free.fr>
bc19636d587fbabfbc2252f1bf4887fee87bb247Dennis Schridde
cae3584efccc63f544c8748bd13d80e11bc79aefgza# This library is free software; you can redistribute it and/or
cae3584efccc63f544c8748bd13d80e11bc79aefgza# modify it under the terms of the GNU Lesser General Public
cae3584efccc63f544c8748bd13d80e11bc79aefgza# License as published by the Free Software Foundation; either
cae3584efccc63f544c8748bd13d80e11bc79aefgza# version 2.1 of the License, or (at your option) any later version.
cae3584efccc63f544c8748bd13d80e11bc79aefgza
cae3584efccc63f544c8748bd13d80e11bc79aefgza# This library is distributed in the hope that it will be useful,
cae3584efccc63f544c8748bd13d80e11bc79aefgza# but WITHOUT ANY WARRANTY; without even the implied warranty of
cae3584efccc63f544c8748bd13d80e11bc79aefgza # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
cae3584efccc63f544c8748bd13d80e11bc79aefgza# Lesser General Public License for more details.
cae3584efccc63f544c8748bd13d80e11bc79aefgza
cae3584efccc63f544c8748bd13d80e11bc79aefgza# You should have received a copy of the GNU Lesser General Public
cae3584efccc63f544c8748bd13d80e11bc79aefgza# License along with this library; if not, write to the Free Software
cae3584efccc63f544c8748bd13d80e11bc79aefgza# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
cae3584efccc63f544c8748bd13d80e11bc79aefgza
cae3584efccc63f544c8748bd13d80e11bc79aefgzaDISTRO=fedora-10
cae3584efccc63f544c8748bd13d80e11bc79aefgza
cae3584efccc63f544c8748bd13d80e11bc79aefgzaconfigure_fedora()
cae3584efccc63f544c8748bd13d80e11bc79aefgza{
cae3584efccc63f544c8748bd13d80e11bc79aefgza rootfs=$1
5b99af0079813347d90c935ea540ed7f96dcea38Stéphane Graber hostname=$2
# disable selinux in fedora
mkdir -p $rootfs/selinux
echo 0 > $rootfs/selinux/enforce
# configure the network using the dhcp
cat <<EOF > $rootfs/etc/network/interfaces
auto lo
iface lo inet loopback
auto eth0
iface eth0 inet dhcp
EOF
# set the hostname
cat <<EOF > $rootfs/etc/hostname
$hostname
EOF
# set minimal hosts
cat <<EOF > $rootfs/etc/hosts
127.0.0.1 localhost $hostname
EOF
# provide the lxc service
cat <<EOF > $rootfs/etc/init/lxc.conf
# fake some events needed for correct startup other services
description "Container Upstart"
start on startup
script
rm -rf /var/run/*.pid
rm -rf /var/run/network/*
/sbin/initctl emit stopped JOB=udevtrigger --no-wait
/sbin/initctl emit started JOB=udev --no-wait
end script
EOF
cat <<EOF > $rootfs/etc/init/console.conf
# console - getty
#
# This service maintains a console on tty1 from the point the system is
# started until it is shut down again.
start on stopped rc RUNLEVEL=[2345]
stop on runlevel [!2345]
respawn
exec /sbin/getty -8 38400 /dev/console
EOF
cat <<EOF > $rootfs/lib/init/fstab
# /lib/init/fstab: lxc system fstab
none /spu spufs gid=spu,optional 0 0
none /tmp none defaults 0 0
none /var/lock tmpfs nodev,noexec,nosuid,showthrough 0 0
none /lib/init/rw tmpfs mode=0755,nosuid,optional 0 0
EOF
# reconfigure some services
if [ -z "$LANG" ]; then
chroot $rootfs locale-gen en_US.UTF-8
chroot $rootfs update-locale LANG=en_US.UTF-8
else
chroot $rootfs locale-gen $LANG
chroot $rootfs update-locale LANG=$LANG
fi
# remove pointless services in a container
chroot $rootfs /usr/sbin/update-rc.d -f ondemand remove
chroot $rootfs /bin/bash -c 'cd /etc/init; for f in $(ls u*.conf); do mv $f $f.orig; done'
chroot $rootfs /bin/bash -c 'cd /etc/init; for f in $(ls tty[2-9].conf); do mv $f $f.orig; done'
chroot $rootfs /bin/bash -c 'cd /etc/init; for f in $(ls plymouth*.conf); do mv $f $f.orig; done'
chroot $rootfs /bin/bash -c 'cd /etc/init; for f in $(ls hwclock*.conf); do mv $f $f.orig; done'
chroot $rootfs /bin/bash -c 'cd /etc/init; for f in $(ls module*.conf); do mv $f $f.orig; done'
echo "Please change root-password !"
echo "root:root" | chroot $rootfs chpasswd
return 0
}
download_fedora()
{
cache=$1
arch=$2
# check the mini fedora was not already downloaded
mkdir -p "$cache/partial-$arch"
if [ $? -ne 0 ]; then
echo "Failed to create '$cache/partial-$arch' directory"
return 1
fi
# download a mini fedora into a cache
echo "Downloading fedora minimal ..."
febootstrap $DISTRO $cache/partial-$arch
if [ $? -ne 0 ]; then
echo "Failed to download the rootfs, aborting."
return 1
fi
mv "$1/partial-$arch" "$1/rootfs-$arch"
echo "Download complete."
return 0
}
copy_fedora()
{
cache=$1
arch=$2
rootfs=$3
# make a local copy of the minifedora
echo -n "Copying rootfs to $rootfs ..."
cp -a $cache/rootfs-$arch $rootfs || return 1
return 0
}
install_fedora()
{
cache="/var/cache/lxc/fedora"
rootfs=$1
mkdir -p /var/lock/subsys/
(
flock -n -x 200
if [ $? -ne 0 ]; then
echo "Cache repository is busy."
return 1
fi
arch=$(arch)
echo "Checking cache download in $cache/rootfs-$arch ... "
if [ ! -e "$cache/rootfs-$arch" ]; then
download_fedora $cache $arch
if [ $? -ne 0 ]; then
echo "Failed to download 'fedora base'"
return 1
fi
fi
echo "Copy $cache/rootfs-$arch to $rootfs ... "
copy_fedora $cache $arch $rootfs
if [ $? -ne 0 ]; then
echo "Failed to copy rootfs"
return 1
fi
return 0
) 200>/var/lock/subsys/lxc
return $?
}
copy_configuration()
{
path=$1
rootfs=$2
name=$3
cat <<EOF >> $path/config
lxc.utsname = $name
lxc.tty = 4
lxc.pts = 1024
lxc.rootfs = $rootfs
lxc.mount = $path/fstab
lxc.console = /dev/console
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 > $path/fstab
proc $rootfs/proc proc nodev,noexec,nosuid 0 0
devpts $rootfs/dev/pts devpts defaults 0 0
sysfs $rootfs/sys sysfs defaults 0 0
EOF
if [ $? -ne 0 ]; then
echo "Failed to add configuration"
return 1
fi
return 0
}
clean()
{
cache="/var/cache/lxc/fedora"
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..."
rm --preserve-root --one-file-system -rf $cache && echo "Done." || exit 1
exit 0
) 200>/var/lock/subsys/lxc
}
usage()
{
cat <<EOF
$1 -h|--help -p|--path=<path> --clean
EOF
return 0
}
options=$(getopt -o hp:n:c -l help,path:,name:,clean -- "$@")
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;;
-c|--clean) clean=$2; shift 2;;
--) shift 1; break ;;
*) break ;;
esac
done
if [ ! -z "$clean" -a -z "$path" ]; then
clean || exit 1
exit 0
fi
type febootstrap
if [ $? -ne 0 ]; then
echo "'febootstrap' command is missing"
exit 1
fi
if [ -z "$path" ]; then
echo "'path' parameter is required"
exit 1
fi
if [ "$(id -u)" != "0" ]; then
echo "This script should be run as 'root'"
exit 1
fi
rootfs=$path/rootfs
install_fedora $rootfs
if [ $? -ne 0 ]; then
echo "failed to install fedora"
exit 1
fi
configure_fedora $rootfs $name
if [ $? -ne 0 ]; then
echo "failed to configure fedora for a container"
exit 1
fi
copy_configuration $path $rootfs $name
if [ $? -ne 0 ]; then
echo "failed write configuration file"
exit 1
fi
if [ ! -z $clean ]; then
clean || exit 1
exit 0
fi