Add ubuntu-cloud template

This is a new template to create containers based on the ubuntu
cloud images, rather than using debootstrap.

Signed-off-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: Daniel Lezcano <dlezcano@fr.ibm.com>

3 files changed, 252 insertions, 0 deletions

diff --git a/configure.ac b/configure.ac
index 8383d3f..478bfd7 100644
--- a/configure.ac
+++ b/configure.ac
@@ -141,6 +141,7 @@ AC_CONFIG_FILES([
 	templates/lxc-lenny
 	templates/lxc-debian
 	templates/lxc-ubuntu
+	templates/lxc-ubuntu-cloud
 	templates/lxc-opensuse
 	templates/lxc-busybox
 	templates/lxc-fedora
diff --git a/templates/Makefile.am b/templates/Makefile.am
index a2f9498..d6b3892 100644
--- a/templates/Makefile.am
+++ b/templates/Makefile.am
@@ -4,6 +4,7 @@ templates_SCRIPTS = \
 	lxc-debian \
 	lxc-lenny \
 	lxc-ubuntu \
+	lxc-ubuntu-cloud \
 	lxc-opensuse \
 	lxc-fedora \
 	lxc-altlinux \
diff --git a/templates/lxc-ubuntu-cloud.in b/templates/lxc-ubuntu-cloud.in
new file mode 100644
index 0000000..24fa2f6
--- /dev/null
+++ b/templates/lxc-ubuntu-cloud.in
@@ -0,0 +1,250 @@
+#!/bin/bash
+
+# template script for generating ubuntu container for LXC based on daily cloud
+# images
+#
+# Copyright © 2012 Serge Hallyn <serge.hallyn@canonical.com>
+#
+# 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.
+#
+
+set -e
+
+if [ -r /etc/default/lxc ]; then
+    . /etc/default/lxc
+fi
+
+copy_configuration()
+{
+    path=$1
+    rootfs=$2
+    name=$3
+    arch=$4
+
+    if [ $arch = "i386" ]; then
+        arch="i686"
+    fi
+
+    cat <<EOF >> $path/config
+lxc.utsname = $name
+
+lxc.tty = 4
+lxc.pts = 1024
+lxc.rootfs = $rootfs
+lxc.mount  = $path/fstab
+lxc.arch = $arch
+lxc.cap.drop = sys_module mac_admin
+
+lxc.cgroup.devices.deny = a
+# Allow any mknod (but not using the node)
+lxc.cgroup.devices.allow = c *:* m
+lxc.cgroup.devices.allow = b *:* m
+# /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
+#fuse
+lxc.cgroup.devices.allow = c 10:229 rwm
+#tun
+lxc.cgroup.devices.allow = c 10:200 rwm
+#full
+lxc.cgroup.devices.allow = c 1:7 rwm
+#hpet
+lxc.cgroup.devices.allow = c 10:228 rwm
+#kvm
+lxc.cgroup.devices.allow = c 10:232 rwm
+EOF
+
+    cat <<EOF > $path/fstab
+proc            $rootfs/proc         proc    nodev,noexec,nosuid 0 0
+sysfs           $rootfs/sys          sysfs defaults  0 0
+EOF
+
+    return 0
+}
+
+usage()
+{
+    cat <<EOF
+$1 -h|--help [-a|--arch] [-F | --flush-cache] [-r|--release <release>]
+release: lucid | maverick | natty | oneiric | precise
+arch: amd64 or i386: defaults to host arch
+EOF
+    return 0
+}
+
+options=$(getopt -o a:hp:r:n:Fi:C -l arch:,help,path:,release:,name:,flush-cache,hostid:,cloud -- "$@")
+if [ $? -ne 0 ]; then
+    usage $(basename $0)
+    exit 1
+fi
+eval set -- "$options"
+
+release=lucid
+if [ -f /etc/lsb-release ]; then
+    . /etc/lsb-release
+    case "$DISTRIB_CODENAME" in
+        lucid|maverick|natty|oneiric|precise)
+            release=$DISTRIB_CODENAME
+        ;;
+    esac
+fi
+
+arch=$(arch)
+
+# Code taken from debootstrap
+if [ -x /usr/bin/dpkg ] && /usr/bin/dpkg --print-architecture >/dev/null 2>&1; then
+    arch=`/usr/bin/dpkg --print-architecture`
+elif type udpkg >/dev/null 2>&1 && udpkg --print-architecture >/dev/null 2>&1; then
+    arch=`/usr/bin/udpkg --print-architecture`
+else
+    arch=$(arch)
+    if [ "$arch" = "i686" ]; then
+        arch="i386"
+    elif [ "$arch" = "x86_64" ]; then
+        arch="amd64"
+    elif [ "$arch" = "armv7l" ]; then
+        arch="armel"
+    fi
+fi
+
+hostarch=$arch
+cloud=0
+flushcache=0
+while true
+do
+    case "$1" in
+    -h|--help)      usage $0 && exit 0;;
+    -p|--path)      path=$2; shift 2;;
+    -n|--name)      name=$2; shift 2;;
+    -F|--flush-cache) flushcache=1; shift 1;;
+    -r|--release)   release=$2; shift 2;;
+    -a|--arch)      arch=$2; shift 2;;
+    -i|--hostid)    host_id=$2; shift 2;;
+    -u|--userdata)  userdata=$2; shift 2;;
+    -C|--cloud)     cloud=1; shift 1;;
+    --)             shift 1; break ;;
+        *)              break ;;
+    esac
+done
+
+if [ "$arch" == "i686" ]; then
+    arch=i386
+fi
+
+if [ $hostarch = "i386" -a $arch = "amd64" ]; then
+    echo "can't create amd64 container on i386"
+    exit 1
+fi
+
+if [ $arch != "i386" -a $arch != "amd64" ]; then
+    echo "Only i386 and amd64 are supported by the ubuntu cloud template."
+    exit 1
+fi
+
+if [ -z "$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
+
+type ubuntu-cloudimg-query
+type wget
+
+# determine the url, tarball, and directory names
+# download if needed
+cache="/var/cache/lxc/cloud-$release"
+
+mkdir -p $cache
+
+url1=`ubuntu-cloudimg-query precise daily $arch --format "%{url}\n"`
+url2=`echo $url1 | sed -e 's/.tar.gz/-root\0/'`
+filename=`basename $url2`
+
+mkdir -p /var/lock/subsys/
+(
+    flock -n -x 200
+
+    cd $cache
+    if [ $flushcache -eq 1 ]; then
+        echo "Clearing the cached images"
+        rm -f $filename
+    fi
+
+    if [ ! -f $filename ]; then
+        wget $url2
+    fi
+
+    echo "Extracting rootfs"
+    mkdir -p $rootfs
+    cd $rootfs
+    tar -zxf $cache/$filename
+
+
+    if [ $cloud -eq 0 ]; then
+	echo "Configuring for running outside of a cloud environment"
+	echo "If you want to configure for a cloud evironment, please use '-- -C' to create the container"
+
+	seed_d=$rootfs/var/lib/cloud/seed/nocloud-net
+	rhostid=$(uuidgen | cut -c -8)
+        host_id=${hostid:-$rhostid}
+        mkdir -p $seed_d
+
+	cat > "$seed_d/meta-data" <<EOF
+instance_id: lxc-$host_id
+EOF
+
+	if [ ! -f $userdata ]; then
+		cp $userdata $seed_d/user-data
+	else
+	        echo "#cloud-config" > $seed_d/user-data
+		if [ -z "$MIRROR" ]; then
+			MIRROR="http://archive.ubuntu.com/ubuntu"
+		fi
+		echo "apt-mirror: $MIRROR" >> $seed_d/user-data
+	fi
+
+	chroot $rootfs /usr/sbin/usermod -U ubuntu
+	echo "Please login as user ubuntu with password ubuntu."
+
+   else
+
+	echo "Configured for running in a cloud environment."
+	echo "If you do not have a meta-data service, this container will likely be useless."
+
+   fi
+
+) 200>/var/lock/subsys/lxc-ubucloud
+
+copy_configuration $path $rootfs $name $arch
+
+echo "Container $name created."
+exit 0