check_aws_amis.sh

#!/bin/bash
#
# checks for the number of AWS AMIs and allows alerts when threshold is met
# example usage:
#   ./check_aws_amis.sh -w <integer> -c <integer>
###
### USES ANSIBLE to put AWS KEYs as VARS
### USES ANSIBLE to define NAGIOS REGION
###
### REQUIRES AWS CLI : https://aws.amazon.com/cli/
### REQUIRES JQ : https://stedolan.github.io/jq/

export AWS_ACCESS_KEY_ID={{ aws_access_key_id }}
export AWS_SECRET_ACCESS_KEY={{ aws_secret_access_key }}

warn=NULL
critical=NULL

help () {
cat << EOF
Check number of AMIs in AWS.

Usage:
	check_aws_amis.sh -w <warning number> -c <critical number>

Options:
	-h,
	 	Print detailed help screen
	-w INTEGER
		Exit with WARNING status if greater than INTEGER
	-c INTEGER
		Exit with CRITICAL status if greater than INTEGER
EOF
exit 3
}

while getopts "w:c:h" opt; do
	case $opt in
		w)
			warn="$OPTARG"
			;;
		c)
			critical="$OPTARG"
			;;
		h)
			help
			;;
	esac
done

if [[ "$warn" == "NULL" ]] || [[ "$critical" == "NULL" ]]; then
	help
fi

amis=`aws ec2 describe-images --owners self --region {{ ansible_ec2_placement_region }} | jq -r '.Images | length'`

if [ $amis -ge $critical ]; then
	dostatus="CRITICAL"
	doexit=2
elif [ $amis -ge $warn ]; then
	dostatus="WARNING"
	doexit=1
elif [ $amis -lt $warn ]; then
	dostatus="OK"
	doexit=0
else
	dostatus="UNKOWN"
	doexit=3
fi

echo "AWS AMIs ${dostatus} - ${amis} AWS AMIs | amis=${amis};0;0;0;0"
exit $doexit