ansible - example of using lookup and a template to generate dynamic list entries for modules

efs_targets.j2

#jinja2:trim_blocks: True, lstrip_blocks: True
targets:
  {% for privnet in all_private_subnets %}
  - subnet_id: "{{ privnet }}"
    security_groups: [ "{{ sg.group_id }}" ]
  {% endfor %}
  {% for pubnet in all_public_subnets %}
  - subnet_id: "{{ pubnet }}"
    security_groups: [ "{{ sg.group_id }}" ]
  {% endfor %}

play.yml

---
- hosts: localhost
  gather_facts: False
  connection: local
  tasks:
    - efs:
        state: present
        name: "{{ region }}-{{ service }}"
        tags:
          name: "{{ region }}-{{ service }}"
          purpose: "{{ service }}"
          deploy_env: "{{ deploy_env }}"
          vpc: "{{ vpc_id }}"
        targets: "{{ lookup('template', 'efs_targets.j2') | from_yaml }}"
        register: ec2_efs