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#!/bin/bash
# -------------------------------------------------------------------------- #
# Copyright 2002-2012, 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. #
#--------------------------------------------------------------------------- #
# 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 ""
}
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`
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