templates: add openSUSE template.

The good news is, starting with next openSUSE release (and next SLES 11
Service Pack), patching /etc/init.d/boot won't be needed anymore for
LXC, we integrated detection of LXC (through container variable set to
lxc) in /etc/init.d/boot and /dev is no longer mounted automatically by
initscript.

Signed-off-by: Frederic Crozat <fcrozat@suse.com>
Signed-off-by: Daniel Lezcano <dlezcano@fr.ibm.com>

2 files changed, 369 insertions, 0 deletions

diff --git a/templates/Makefile.am b/templates/Makefile.am
index 619eae5..658fb2f 100644
--- a/templates/Makefile.am
+++ b/templates/Makefile.am
@@ -4,6 +4,7 @@ templates_SCRIPTS = \
 	lxc-debian \
 	lxc-lenny \
 	lxc-ubuntu \
+	lxc-opensuse \
 	lxc-fedora \
 	lxc-busybox \
 	lxc-sshd
diff --git a/templates/lxc-opensuse.in b/templates/lxc-opensuse.in
new file mode 100644
index 0000000..811876a
--- /dev/null
+++ b/templates/lxc-opensuse.in
@@ -0,0 +1,368 @@
+#!/bin/bash
+
+#
+# template script for generating suse container for LXC
+#
+
+#
+# lxc: linux Container library
+
+# Authors:
+# Daniel Lezcano <daniel.lezcano@free.fr>
+# Frederic Crozat <fcrozat@suse.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
+
+DISTRO=11.4
+
+configure_opensuse()
+{
+    rootfs=$1
+    hostname=$2
+
+   # set network as static, but everything is done by LXC outside the container
+   cat <<EOF > $rootfs/etc/sysconfig/network/ifcfg-eth0
+STARTMODE='auto'
+BOOTPROTO='static'
+EOF
+
+   # set default route
+   IP=$(/sbin/ip route | awk '/default/ { print $3 }')
+   echo "default $IP - -" > $rootfs/etc/sysconfig/network/routes
+
+   # create empty fstab
+   touch $rootfs/etc/fstab
+
+    # create minimal /dev
+    mknod -m 666 $rootfs/dev/random c 1 8
+    mknod -m 666 $rootfs/dev/urandom c 1 9
+    mkdir -m 755 $rootfs/dev/pts
+    mkdir -m 1777 $rootfs/dev/shm
+    mknod -m 666 $rootfs/dev/tty c 5 0
+    mknod -m 600 $rootfs/dev/console c 5 1
+    mknod -m 666 $rootfs/dev/tty0 c 4 0
+    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
+    ln -s null $rootfs/dev/tty10
+    mknod -m 666 $rootfs/dev/full c 1 7
+    mknod -m 666 $rootfs/dev/ptmx c 5 2
+    ln -s /proc/self/fd $rootfs/dev/fd
+    ln -s /proc/kcore $rootfs/dev/core
+    mkdir -m 755 $rootfs/dev/mapper
+    mknod -m 600 $rootfs/dev/mapper/control c 10 60
+    mkdir -m 755 $rootfs/dev/net
+    mknod -m 666 $rootfs/dev/net/tun c 10 200
+
+    # set the hostname
+    cat <<EOF > $rootfs/etc/HOSTNAME
+$hostname
+EOF
+
+    # do not use hostname from HOSTNAME variable
+    cat <<EOF >> $rootfs/etc/sysconfig/cron
+unset HOSTNAME
+EOF
+
+    # set minimal hosts
+    cat <<EOF > $rootfs/etc/hosts
+127.0.0.1 localhost $hostname
+EOF
+
+    # disable various services
+    # disable yast->bootloader in container
+    cat <<EOF > $rootfs/etc/sysconfig/bootloader
+LOADER_TYPE=none
+LOADER_LOCATION=none
+EOF
+
+    # cut down inittab
+    cat <<EOF > $rootfs/etc/inittab
+id:3:initdefault:
+si::bootwait:/etc/init.d/boot
+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
+l6:6:wait:/etc/init.d/rc 6
+ls:S:wait:/etc/init.d/rc S
+~~:S:respawn:/sbin/sulogin
+p6::ctrlaltdel:/sbin/init 6
+p0::powerfail:/sbin/init 0
+cons:2345:respawn:/sbin/mingetty --noclear console screen
+c1:2345:respawn:/sbin/mingetty --noclear tty1 screen
+EOF
+
+    # patch boot script, no longer needed in openSUSE 12.1 / SLE11-SP2
+    patch --quiet -d $rootfs/etc/init.d/ << EOF
+--- boot.orig	2011-05-26 16:03:07.000000000 +0200
++++ boot	2011-05-26 16:03:19.000000000 +0200
+@@ -98,12 +98,12 @@
+     echo "***************************************************************"
+     /sbin/halt -f
+     fi
+-    echo -n "Mounting devtmpfs at /dev"
+-    mount -n -t devtmpfs -o mode=0755 devtmpfs /dev
+-    rc_status -v -r
++#    echo -n "Mounting devtmpfs at /dev"
++#    mount -n -t devtmpfs -o mode=0755 devtmpfs /dev
++#    rc_status -v -r
+ fi
+
+-cp -axT --remove-destination /lib/udev/devices /dev
++#cp -axT --remove-destination /lib/udev/devices /dev
+
+ if test -d /sys/kernel/debug -a "$HAVE_DEBUGFS" = "1" ; then
+     mount -n -t debugfs debugfs /sys/kernel/debug > /dev/null 2>&1
+EOF
+    cat <<EOF >> $rootfs/etc/sysconfig/boot
+# disable root fsck
+ROOTFS_FSCK="0"
+ROOTFS_BLKDEV="/dev/null"
+EOF
+
+
+    # remove pointless services in a container
+    insserv -r -f -p $rootfs/etc/init.d boot.udev boot.udev_retry boot.md boot.lvm boot.loadmodules boot.device-mapper boot.clock boot.swap boot.klog
+
+    echo "Please change root-password !"
+    echo "root:root" | chroot $rootfs chpasswd
+
+    return 0
+}
+
+download_opensuse()
+{
+    cache=$1
+    arch=$2
+
+    # check the mini opensuse was not already downloaded
+    mkdir -p "$cache/partial-$arch"
+
+    if [ $? -ne 0 ]; then
+	echo "Failed to create '$cache/partial-$arch' directory"
+	return 1
+    fi
+
+    # download a mini opensuse into a cache
+    echo "Downloading opensuse minimal ..."
+    mkdir -p "$cache/partial-$arch/dev"
+    mknod -m 666 $cache/partial-$arch/dev/null c 1 3
+    mknod -m 666 $cache/partial-$arch/dev/zero c 1 5
+    zypper --quiet --root $cache/partial-$arch --non-interactive ar http://download.opensuse.org/distribution/$DISTRO/repo/oss/ repo-oss
+    zypper --quiet --root $cache/partial-$arch --non-interactive ar http://download.opensuse.org/update/$DISTRO/ update
+    zypper --quiet --root $cache/partial-$arch --non-interactive --gpg-auto-import-keys in --auto-agree-with-licenses -t pattern base
+    zypper --quiet --root $cache/partial-$arch --non-interactive --gpg-auto-import-keys in +lxc -kbd -patterns-openSUSE-base
+    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_opensuse()
+{
+    cache=$1
+    arch=$2
+    rootfs=$3
+
+    # make a local copy of the mini opensuse
+    echo -n "Copying rootfs to $rootfs ..."
+    cp -a $cache/rootfs-$arch $rootfs || return 1
+    return 0
+}
+
+install_opensuse()
+{
+    cache="/var/cache/lxc/opensuse"
+    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_opensuse $cache $arch
+	    if [ $? -ne 0 ]; then
+		echo "Failed to download 'opensuse base'"
+		return 1
+	    fi
+	fi
+
+	echo "Copy $cache/rootfs-$arch to $rootfs ... "
+	copy_opensuse $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.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
+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/opensuse"
+
+    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 zypper > /dev/null
+if [ $? -ne 0 ]; then
+    echo "'zypper' command is missing"
+    exit 1
+fi
+
+if [ -z "$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_opensuse $rootfs
+if [ $? -ne 0 ]; then
+    echo "failed to install opensuse"
+    exit 1
+fi
+
+configure_opensuse $rootfs $name
+if [ $? -ne 0 ]; then
+    echo "failed to configure opensuse 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