OpenNebula

#!/bin/bash

# Opennebula network contextualization initscript for debian

# Copy in /etc/init.d and install:

# update-rc.d vmcontext.sh start 01 S

### BEGIN INIT INFO

# Provides:       vmcontext

# Required-Start: mountkernfs $local_fs

# Required-Stop:

# Default-Stop:

# Default-Start:  S

# X-Start-Before: ifupdown networking

# Short-Description: Start the Opennebula context.

### END INIT INFO

# -------------------------------------------------------------------------- #

# Copyright 2002-2011, OpenNebula Project Leads (OpenNebula.org)             #

#                                                                            #

# Licensed under the Apache License, Version 2.0 (the "License"); you may    #

# not use this file except in compliance with the License. You may obtain    #

# a copy of the License at                                                   #

#                                                                            #

# http://www.apache.org/licenses/LICENSE-2.0                                 #

#                                                                            #

# Unless required by applicable law or agreed to in writing, software        #

# distributed under the License is distributed on an "AS IS" BASIS,          #

# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.   #

# See the License for the specific language governing permissions and        #

# limitations under the License.                                             #

#--------------------------------------------------------------------------- #

. /lib/lsb/init-functions

# Gets IP address from a given MAC

mac2ip() {

    mac=$1

    let ip_a=0x`echo $mac | cut -d: -f 3`

    let ip_b=0x`echo $mac | cut -d: -f 4`

    let ip_c=0x`echo $mac | cut -d: -f 5`

    let ip_d=0x`echo $mac | cut -d: -f 6`

    ip="$ip_a.$ip_b.$ip_c.$ip_d"

    echo $ip

}

# Gets the network part of an IP

get_network() {

    IP=$1

    echo $IP | cut -d'.' -f1,2,3

}

get_interfaces() {

    IFCMD="/sbin/ifconfig -a"

    $IFCMD | grep ^eth | sed 's/ *Link encap:Ethernet.*HWaddr /-/g'

}

get_dev() {

    echo $1 | cut -d'-' -f 1

}

get_mac() {

    echo $1 | cut -d'-' -f 2

}

gen_hosts() {

    NETWORK=$1

    echo "127.0.0.1 localhost"

    for n in `seq -w 01 99`; do

        n2=`echo $n | sed 's/^0*//'`

        echo ${NETWORK}.$n2 cluster${n}

    done

}

gen_exports() {

    NETWORK=$1

    echo "/images ${NETWORK}.0/255.255.255.0(rw,async,no_subtree_check)"

}

gen_hostname() {

    MAC=$1

    NUM=`mac2ip $MAC | cut -d'.' -f4`

    NUM2=`echo 000000$NUM | sed 's/.*\(..\)/\1/'`

    echo cluster$NUM2

}

gen_interface() {

    DEV_MAC=$1

    DEV=`get_dev $DEV_MAC`

    MAC=`get_mac $DEV_MAC`

    IP=`mac2ip $MAC`

    NETWORK=`get_network $IP`

    cat <<EOT

auto $DEV

iface $DEV inet static

  address $IP

  network $NETWORK.0

  netmask 255.255.255.0

EOT

    if [ $DEV == "eth0" ]; then

      echo "  gateway $NETWORK.1"

    fi

echo ""

}

case "$1" in

  start)

	log_action_msg "Starting the Opennebula contextualization network"

	IFACES=`get_interfaces`

	for i in $IFACES; do

	    MASTER_DEV_MAC=$i

	    DEV=`get_dev $i`

	    MAC=`get_mac $i`

	    IP=`mac2ip $MAC`

	    NETWORK=`get_network $IP`

	done

	# gen_hosts $NETWORK > /etc/hosts

	# gen_exports $NETWORK  > /etc/exports

	# gen_hostname $MAC  > /etc/hostname

	(

cat <<EOT

auto lo

iface lo inet loopback

EOT

	for i in $IFACES; do

	    gen_interface $i

	done

	) > /etc/network/interfaces

	# /bin/hostname `cat /etc/hostname`

	;;

  restart|reload|force-reload)

	echo "Error: argument '$1' not supported" >&2

        exit 3

        ;;

  stop)

        ;;

  *)

        echo "Usage: $0 start|stop" >&2

        exit 3

        ;;

esac