check_elb_registration

#!/bin/bash

# written by filip@skyscrape.rs
# 2014-01-28

# checks if this machine is registered and InService with the given ELB

HOME="/var/lib/nagios"

if [ $# -eq "1" ]; then

	INSTANCEID=`/usr/bin/ec2metadata --instance-id`

	RESULT=`/usr/local/bin/aws --profile nagiosro elb describe-instance-health --load-balancer-name $1 --instances $INSTANCEID`

	echo $RESULT | grep -q "\"State\": \"InService\""
	if [ $? -eq 0 ]; then
		echo "OK - $INSTANCEID is InService with ELB $1"
		exit 0
	fi

	echo $RESULT | grep -q "\"State\": \"OutOfService\""
	if [ $? -eq 0 ]; then
	        echo "CRITICAL - $INSTANCEID is OutOfService with ELB $1"
        	exit 2
	fi

	echo "CRITICAL - something is FUBAR with $INSTANCEID and ELB $1"
	exit 2

else
        echo "USAGE: $0 <ELB Name>"
        exit 1
fi