Ansible HAProxy Playbook

loadbalancer.yml

---
- hosts: webservers
  become_user: root
  become: yes
  tasks:
  - name: gather facts from web servers
    amazon.aws.ec2_metadata_facts:

- hosts: loadbalancers
  become_user: root
  become: yes
  pre_tasks:

  - name: update package list
    ansible.builtin.apt:
      update_cache: yes

  roles:
  - role: geerlingguy.haproxy
    haproxy_version: "{{ '1.4' if '1.4.' in haproxy_version_result.stdout else '1.5' }}"
    haproxy_backend_servers:
      - name: web1
        address: "{{ hostvars['host1']['ansible_ec2_public_ipv4'] }}:80"
      - name: web2
        address: "{{ hostvars['host2']['ansible_ec2_public_ipv4'] }}:80"