haproxy.yml file

haproxy.yml

---
- hosts: localhost
  become: yes
  vars_files:
    - aws_credentials.yml  # Contains AWS access keys and secret keys
    - aws_ec2_configs.yml  # Contains configuration such as AWS region

  # Handlers are tasks that respond to a notify directive and are typically used to restart services
  handlers:
    - name: Restart HAProxy service
      ansible.builtin.service:
        name: haproxy
        state: restarted
      listen: "restart haproxy"

  tasks:
    - name: Install HAProxy
      ansible.builtin.package:
        name: haproxy
        state: present
      notify: "restart haproxy"  # Notify handler if the package is installed or updated

    - name: Ensure HAProxy service is started and enabled on boot
      ansible.builtin.service:
        name: haproxy
        state: started
        enabled: yes

    - name: Gather EC2 instance information
      amazon.aws.ec2_instance_info:
        aws_access_key: "{{ aws_access_key }}"
        aws_secret_key: "{{ aws_secret_access_key }}"
        region: "{{ region_name }}"
        filters:
          "tag:Name": "ansible-managed-servers"
          instance-state-name: ["running"]
      register: ec2_info
      failed_when: ec2_info.instances | length == 0  # Fail if no instances are found

    - name: Set private IP addresses of EC2 instances
      set_fact:
        private_ip: "{{ ec2_info.instances | map(attribute='private_ip_address') | list }}"

    - name: Display the private IP addresses of EC2 instances
      ansible.builtin.debug:
        var: private_ip

    - name: Update HAProxy configuration with EC2 instance IPs
      ansible.builtin.template:
        src: haproxy.j2
        dest: /etc/haproxy/haproxy.cfg
      notify: "restart haproxy"  # Notify handler if the template changes

  # Flush handlers to ensure any configuration changes take effect
  post_tasks:
    - name: Ensure HAProxy service is restarted if needed
      meta: flush_handlers