gistfile1.txt

#!/bin/bash
#Author: Brian Bianco
#Email: Brian.Bianco@gmail.com


usage()
{
cat << EOF
usage: $0 options

OPTIONS:
  -h  Show this message
  -a  Show all instance info
  -m  <meta-data name> will return the value of that meta-data
EOF
}

if [ $# -eq 0 ]; then
	usage
	exit 1;
fi


ALL=
META_NAME=

while getopts "hvam:" OPTION
do
	case $OPTION in
		h)
			usage
			exit 1
			;;
		a)
			ALL=1
			;;
		m)
			META_NAME=$OPTARG
			;;
		?)
			usage
			exit 1
			;;

		*)
			usage
			exit 1
			;;

	esac
done

info=('ami-id' 'ami-launch-index' 'ami-manifest-path' 'ancestor-ami-ids' 'hostname' 'instance-action' 'instance-id' 'instance-type' 'kernel-id' 'ramdisk-id' 'local-hostname' 'local-ipv4' 'mac' 'profile' 'public-hostname' 'public-ipv4' 'reservation-id' 'security-groups' 'public-keys' 'block-device-mapping/ami' 'block-device-mapping/ephemeral0' 'block-device-mapping/root' 'placement/availability-zone' 'network/interfaces/macs');

if [ ! -z $META_NAME ]; then
	wget -qO- http://169.254.169.254/latest/meta-data/${META_NAME}
	echo
fi


if [ ! -z $ALL ]; then
	for info in ${info[@]}
	do
  		echo -n "${info} : "
 	 	wget -qO- http://169.254.169.254/latest/meta-data/${info}
  		echo
	done
fi