Hi,
for all interested: attached you'll find a template script for ubuntu
containers.
--
Wilhelm
#!/bin/bash
#
# lxc: linux Container library
configure_ubuntu()
{
rootfs=$1
hostname=$2
# disable selinux in ubuntu
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/*
/sbin/initctl emit stopped JOB=udevtrigger
/sbin/initctl emit started JOB=udev
end script
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/run tmpfs
mode=0755,nosuid,showthrough 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
chroot $rootfs locale-gen de_DE.UTF-8
# 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 echo
$f; mv $f $f.orig; done'
chroot $rootfs /bin/bash -c 'cd /etc/init; for f in $(ls tty[2-9].conf); do
echo $f; mv $f $f.orig; done'
chroot $rootfs /bin/bash -c 'cd /etc/init; for f in $(ls plymouth*.conf);
do echo $f; mv $f $f.orig; done'
chroot $rootfs /bin/bash -c 'cd /etc/init; for f in $(ls hwclock*.conf); do
echo $f; mv $f $f.orig; done'
chroot $rootfs /bin/bash -c 'cd /etc/init; for f in $(ls module*.conf); do
echo $f; mv $f $f.orig; done'
echo "Please change root-password !"
echo "root:root" | chroot /usr/local/var/lib/lxc/test/rootfs chpasswd
}
download_ubuntu()
{
packages=dialog,apt,resolvconf,iproute,inetutils-ping,vim,dhcp3-client,ssh,lsb-release
cache=$1
arch=$2
# check the mini ubuntu was not already downloaded
mkdir -p "$cache/partial-$arch"
if [ $? -ne 0 ]; then
echo "Failed to create '$cache/partial-$arch' directory"
return 1
fi
# download a mini ubuntu into a cache
echo "Downloading ubuntu minimal ..."
debootstrap --verbose --variant=minbase --components=main,universe
--arch=$arch --include=$packages lucid $cache/partial-$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_ubuntu()
{
cache=$1
arch=$2
rootfs=$3
# make a local copy of the miniubuntu
echo -n "Copying rootfs to $rootfs ..."
cp -a $cache/rootfs-$arch $rootfs || return 1
return 0
}
install_ubuntu()
{
cache="/var/cache/lxc/ubuntu"
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)
if [ "$arch" == "x86_64" ]; then
arch=amd64
fi
if [ "$arch" == "i686" ]; then
arch=i386
fi
echo "Checking cache download in $cache/rootfs-$arch ... "
if [ ! -e "$cache/rootfs-$arch" ]; then
download_ubuntu $cache $arch
if [ $? -ne 0 ]; then
echo "Failed to download 'ubuntu base'"
return 1
fi
fi
echo "Copy $cache/rootfs-$arch to $rootfs ... "
copy_ubuntu $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
# Container with network virtualized using the macvlan device driver
lxc.utsname = $name
lxc.network.type = macvlan
lxc.network.flags = up
lxc.network.link = eth1
lxc.network.hwaddr = 4a:49:43:49:79:03
lxc.network.macvlan.mode = vepa
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/ubuntu"
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 debootstrap
if [ $? -ne 0 ]; then
echo "'debootstrap' command is missing"
exit 1
fi
if [ -z "$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_ubuntu $rootfs
if [ $? -ne 0 ]; then
echo "failed to install ubuntu"
exit 1
fi
configure_ubuntu $rootfs $name
if [ $? -ne 0 ]; then
echo "failed to configure ubuntu 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
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