Franchement plutôt que de faire un CD avec des packages qui vont finir par être périmé, tu devrais étudier le script ci-dessous. C’est ce qui permet de créer des VMs de base dans LXC.
C’est assez génial, car il télécharge les packages de base et l’image est donc toujours à jour !
[code]#!/bin/bash
lxc: linux Container library
Authors:
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
configure_debian()
{
rootfs=$1
hostname=$2
# configure the inittab
cat <<EOF > $rootfs/etc/inittab
id:3:initdefault:
si::sysinit:/etc/init.d/rcS
l0:0:wait:/etc/init.d/rc 0
l1:1:wait:/etc/init.d/rc 1
l2:2:wait:/etc/init.d/rc 2
l3:3:wait:/etc/init.d/rc 3
l4:4:wait:/etc/init.d/rc 4
l5:5:wait:/etc/init.d/rc 5
l6:6:wait:/etc/init.d/rc 6
Normally not reached, but fallthrough in case of emergency.
#z6:6:respawn:/sbin/sulogin
1:2345:respawn:/sbin/getty 38400 console
c1:12345:respawn:/sbin/getty 38400 tty1 linux
c2:12345:respawn:/sbin/getty 38400 tty2 linux
c3:12345:respawn:/sbin/getty 38400 tty3 linux
c4:12345:respawn:/sbin/getty 38400 tty4 linux
EOF
# disable selinux in debian
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
# disable selinux in debian
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
$hostname
EOF
# reconfigure some services
if [ -z "$LANG" ]; then
echo "en_US.UTF-8 UTF-8" > $rootfs/etc/locale.gen
chroot $rootfs locale-gen en_US.UTF-8
chroot $rootfs update-locale LC_ALL=en_US.UTF-8 LANG=en_US.UTF-8
else
echo "$LANG UTF-8" > $rootfs/etc/locale.gen
chroot $rootfs locale-gen $LANG
chroot $rootfs update-locale LANG=$LANG LC_ALL=$LANG
fi
# remove pointless services in a container
chroot $rootfs /usr/sbin/update-rc.d -f umountfs remove
chroot $rootfs /usr/sbin/update-rc.d -f hwclock.sh remove
chroot $rootfs /usr/sbin/update-rc.d -f hwclockfirst.sh remove
# do some adjustment for the final image
mknod -m 666 $rootfs/dev/tty1 c 4 1
mknod -m 666 $rootfs/dev/tty2 c 4 2
mknod -m 666 $rootfs/dev/tty3 c 4 3
mknod -m 666 $rootfs/dev/tty4 c 4 4
echo "root:root" | chroot $rootfs chpasswd
echo "Root password is 'root', please change !"
return 0
}
download_debian()
{
packages=
ifupdown,
locales,
libui-dialog-perl,
dialog,
isc-dhcp-client,
netbase,
net-tools,
vim,
iproute,
openssh-server
cache=$1
arch=$2
# check the mini debian was not already downloaded
mkdir -p "$cache/partial-$arch"
if [ $? -ne 0 ]; then
echo "Failed to create '$cache/partial-$arch' directory"
return 1
fi
# download a mini debian into a cache
echo "Downloading debian minimal ..."
debootstrap --verbose --variant=minbase --arch=$arch \
--include $packages \
squeeze $cache/partial-$arch http://ftp.fr.debian.org/debian
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_debian()
{
cache=$1
arch=$2
rootfs=$3
# make a local copy of the minidebian
echo -n "Copying rootfs to $rootfs..."
cp -a $cache/rootfs-$arch $rootfs || return 1
return 0
}
install_debian()
{
cache="/var/cache/lxc/debian-squeeze"
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_debian $cache $arch
if [ $? -ne 0 ]; then
echo "Failed to download 'debian base'"
return 1
fi
fi
copy_debian $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
rndbit=""
while [[ $rndbit != "2" && $rndbit != "6" && $rndbit != "A" && $rndbit != "E" ]]; do
rndbit="$(hexdump -n 1 -v -e '/1 "%02X"' /dev/urandom |sed 's,^.,,g' |tr -d '\n')"
done
macaddr=$(echo -n "0${rndbit}"; hexdump -n 5 -v -e '/1 ":%02X"' /dev/urandom)
cat <<EOF >> $path/config
lxc.network.type = veth
lxc.network.flags = up
lxc.network.link = br0
lxc.network.ipv4 = 0.0.0.0
lxc.network.hwaddr = $macaddr
lxc.tty = 4
lxc.pts = 1024
lxc.rootfs = $rootfs
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
mounts point
lxc.mount.entry=proc $rootfs/proc proc nodev,noexec,nosuid 0 0
lxc.mount.entry=devpts $rootfs/dev/pts devpts defaults 0 0
lxc.mount.entry=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/debian-squeeze"
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
$1 -h|–help -p|–path= -n|–name= --clean
EOF
return 0
}
options=$(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 $name ]; then
echo "No name given"
usage $0
exit 1
fi
if [ ! -z “$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_debian $rootfs
if [ $? -ne 0 ]; then
echo "failed to install debian"
exit 1
fi
configure_debian $rootfs $name
if [ $? -ne 0 ]; then
echo "failed to configure debian for a container"
exit 1
fi
copy_configuration $path $rootfs
if [ $? -ne 0 ]; then
echo "failed write configuration file"
exit 1
fi
if [ ! -z $clean ]; then
clean || exit 1
exit 0
fi
[/code]
