[lxc-devel] [PATCH 1/4] ubunutu template
Daniel Lezcano
dlezcano at fr.ibm.com
Tue Jun 1 16:57:45 UTC 2010
From: Willem Meier <wilhelm.meier at fh-kl.de>
Ubuntu [lucid] template script.
Allows to create an ubuntu container with the template options.
Signed-off-by: Willem Meier <wilhelm.meier at fh-kl.de>
Signed-off-by: Daniel Lezcano <dlezcano at fr.ibm.com>
---
configure.ac | 1 +
scripts/Makefile.am | 1 +
scripts/lxc-ubuntu.in | 327 +++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 329 insertions(+), 0 deletions(-)
create mode 100644 scripts/lxc-ubuntu.in
diff --git a/configure.ac b/configure.ac
index e91f69e..1df6ab5 100644
--- a/configure.ac
+++ b/configure.ac
@@ -135,6 +135,7 @@ AC_CONFIG_FILES([
scripts/Makefile
scripts/lxc-debian
+ scripts/lxc-ubuntu
scripts/lxc-busybox
scripts/lxc-fedora
scripts/lxc-sshd
diff --git a/scripts/Makefile.am b/scripts/Makefile.am
index 803a8e0..39d13a3 100644
--- a/scripts/Makefile.am
+++ b/scripts/Makefile.am
@@ -1,5 +1,6 @@
bin_SCRIPTS = \
lxc-debian \
+ lxc-ubuntu \
lxc-fedora \
lxc-busybox \
lxc-sshd
diff --git a/scripts/lxc-ubuntu.in b/scripts/lxc-ubuntu.in
new file mode 100644
index 0000000..592385e
--- /dev/null
+++ b/scripts/lxc-ubuntu.in
@@ -0,0 +1,327 @@
+#!/bin/bash
+
+#
+# template script for generating ubuntu/lucid container for LXC
+#
+# This script is based on lxc-debian (Daniel Lezcano <daniel.lezcano at free.fr>)
+#
+
+# Copyright © 2010 Wilhelm Meier
+# Author: Wilhelm Meier <wilhelm.meier at fh-kl.de>
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2, as
+# published by the Free Software Foundation.
+
+# This program 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 General Public License for more details.
+
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+#
+
+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
--
1.7.0.4
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