#!/bin/bash

URL="http://169.254.169.254/latest/meta-data/"

which curl > /dev/null 2>&1
if [ $? == 0 ]; then
  get_cmd="curl -s"
else
  get_cmd="wget -q -O -"
fi


get () {
    $get_cmd $URL/$1
}

data_items=(ami-id
            hostname
            instance-id
            instance-type
            local-hostname
            local-ipv4
            public-hostname
            public-ipv4
            public-keys/
            security-groups
            placement/availability-zone
            services/
            )


yaml=""

for meta_thing in ${data_items[*]}; do
    data=$(get $meta_thing)
    entry=$(printf "%-30s%s" "$meta_thing:" "$data\n")
    yaml="$yaml$entry"
done

echo

echo "# There are other metadata elements: do $get_cmd $URL to list them."
echo -e "# You can also do\n#  $get_cmd http://s3.amazonaws.com/ec2metadata/ec2-metadata | bash\n# to get the output of AWS's tool."
echo
echo -e "$yaml"