setup_load_balancer.yml

---

- hosts: localhost
  gather_facts: False

  pre_tasks:
    - community.aws.ec2_instance_info:
        region: "{{ aws_region }}"
        filters:
          "tag:Name": "{{ app_name }}-ec2-{{ ansible_environment }}-webserver"
          instance-state-name: [ "running" ]
      register: register_instance_info

    - set_fact:
        port: 300{{ group_id|default(0) }}

    - set_fact:
        targets: "{{ targets|default([]) + [{ 'Id': item.instance_id, 'Port': port | int}] }}"
      with_items: "{{ register_instance_info.instances }}"

    - name: "The following instances will be set in the target group"
      debug:
        msg: "{{ targets }}"

  roles:
    - role: aws_alb_create
      param_name: "{{ group_id|default(0) }}"
      param_targets: "{{ targets }}"
      param_port: "{{ port }}"
      tags: aws_alb_create