#!/bin/sh
#FLIP1405 - Failover Server Solution
#RUN ON PRIMARY ASTERISK SERVER
#AUTHOR-GREGG HANSEN 20080208
#DEPENDENCIES: nmap, arping
#
#Do a find and replace on the following IP with your Virtual IP
#192.168.5.30  =  VIRTUAL IP

STATUS=$(nmap -p 5060 -sU 127.0.0.1 | awk '{print $2}' | grep open)                     #if Local Asterisk up = 'open|filtered'
PRIMARYIP=$(ifconfig eth0:1 | grep 192.168.5.30 | awk '{print $2}' | sed 's/addr://g')   #if primary owns virtual = '192.168.5.30' 
VIRTUALIP=$(nmap -sP 192.168.5.30 | grep down | awk '{print $4}')                      #if virtual is not pingable = 'down.'



if [ "$STATUS" == "open|filtered" ] ; then  ###is primary asterisk up?   
	if [ "$PRIMARYIP" != "192.168.5.30" ] ; then  ###does primary not own virtual ip?
		if [ "$VIRTUALIP" == "down." ] ; then  ###is the virtual IP not pingable?
		       ifconfig eth0:1 192.168.5.30/24 up
			arping -U -c 5 -I eth0 192.168.5.30  ###Gratuitous ARP request
		fi
	fi
else
	service asterisk start
	ifconfig eth0:1 down
fi