debugTest.yml

---
- name: Let's test debug
  hosts: localhost
  gather_facts: false

  vars:
    region: us-west-2
    count: 1
    id_base: aws-twr

  tasks:
  - name: create/launch
    ec2:
      keypair: dsilva
      group: dsilva-demo
      image: ami-5189a661
      instance_type: t2.micro
      region: "{{ region }}"
      instance_tags:
          Name: "dsilva_demo"
      count: "{{ count }}"
      wait: true
    register: ec2

  - name: tag it
    ec2_tag:
      resource: "{{ item.id }}"
      region: "{{ region }}"
      state: present
      tags:
        Name: "{{ id_base }}-{{ item.id }}"
    with_items: ec2.instances


  - name: create output
    debug:
      msg: "{% set comma = joiner(',') %}
            {% for host in ec2.instances -%}
                '{{ comma() }}{{ host.dns_name }}'
            {%- endfor %}"