Get an Ec2 instance's role from a tag

puppet-custom-fact-role.sh

#!/usr/bin/env bash

meta_url="http://169.254.169.254/latest/meta-data"
instance_id=$(curl -sf ${meta_url}/instance-id)

role=$(aws ec2 describe-tags --filters \
  "Name=resource-type,Values=instance" \
  "Name=resource-id,Values=${instance_id}" \
  "Name=key,Values=role" \
  | jq -r .Tags[].Value)

echo "role=$role"