OpenNebula

#!/bin/bash

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

# Copyright 2002-2009, Distributed Systems Architecture Group, Universidad   #

# Complutense de Madrid (dsa-research.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.                                             #

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

#

# 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 "/var/nebula/machines ${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

DEVICE=$DEV

BOOTPROTO=none

HWADDR=$MAC

ONBOOT=yes

TYPE=Ethernet

NETMASK=255.255.255.0

IPADDR=$IP

EOT

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

    echo "GATEWAY=$NETWORK.1"

  fi

echo ""

}

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_hostname $MAC  > /etc/hostname

for i in $IFACES; do

  DEV=`get_dev $i`

  (gen_interface $i) > /etc/sysconfig/network-scripts/ifcfg-${DEV}

done

/bin/hostname `cat /etc/hostname`