AWS EC2 and compose function

---
plugin: aws_ec2
filters:
  tag:owner: user-name
  tag:cluster: cluster-name
keyed_groups:
  - key: tags.label
    separator: ''
  - key: tags.cluster
    separator: ''
hostnames:
  - dns-name
  - ip-address
compose:
  ansible_user: centos
  ansible_host: "{{ private-ip-address }}"