vrrptracker.sh

#!/bin/bash
run=/opt/vyatta/sbin/vyatta-cfg-cmd-wrapper

# NextHop: Put here, eg. "4.1.1.2" "8.8.8.8"
Nexthop=( "HostA" "HostB" )
# Number of Pings
Count=4
# Source Interface, eg. eth0.100/ eth1
Inf=eth1

#Get the current VRRP priority 
Prio=$(cat /etc/keepalived/keepalived.conf|grep priority|cut -d ' ' -f 2|awk 'NR>1{print $1}')

# Function: Commands to set the priority back
function SetPrioUp() {
	$run begin
	# Uncomment and adjust
	#$run set interfaces ethernet eth0 vrrp vrrp-group 1 priority 110 
	#$run set interfaces ethernet eth0 vif 102 vrrp vrrp-group 102 priority 110 
	$run commit 
	# $run save
	$run end 
}

# Function: Commands to set the VRRP priority lower
function SetPrioDown() {
	$run begin
	# Uncomment and adjust
	#$run set interfaces ethernet eth0 vrrp vrrp-group 1 priority 80 
	#$run set interfaces ethernet eth0 vif 102 vrrp vrrp-group 102 priority 80 
	$run commit 
	#$run save
	$run end 
}

# Function: Change the Priority if  
function SetPrioUp {
	# Check current prio and set up if necessary 
	if [ "$Prio" -ne 110 ] ; then
		echo "setting prio up"
		SetPrioUp
	fi
}

function SetPrioDown {
	# Check current prio and set down if necessary 
	if [ "$Prio" -ne 80 ] ; then
		echo "setting prio down"
		SetPrioDown
	fi
}

# Ping test the $Nexthop
for i in "${Nexthop[@]}"                                               
do                                                                               
	/bin/ping -c $Count -I $Inf $i > /dev/null
                          
	if [ $? -ne 0 ] ; then           
		# Set down or keep Priority
		SetPrioDown; break
        fi                   
done

# Set higher or keep Priority 
SetPrioUp