playbook.yaml

---
- hosts: all
# - hosts: localhost
  # connection: local
  become: true
  vars_files:
    - config.yaml
  tasks:
    - name: Update apt cache
      apt:
        update_cache: yes

    - name: Install prerequisite packages
      apt:
        name:
          - apt-transport-https
          - ca-certificates
          - curl
          - gnupg
          - lsb-release
        state: present

    - name: Add Docker's GPG key
      apt_key:
        url: https://download.docker.com/linux/ubuntu/gpg
        state: present

    - name: Add Docker repository
      apt_repository:
        repo: deb [arch=amd64] https://download.docker.com/linux/ubuntu jammy stable
        state: present

    - name: Install Docker and Docker Compose
      apt:
        name:
          - docker-ce
          - docker-ce-cli
          - containerd.io
          - docker-compose
        state: present

    # Simulating deployment 
    - name: Create Nginx directories
      file:
        path: "/opt/nginx{{ item }}"
        state: directory
        mode: '0755'
      with_sequence: start=1 end={{ containers.nginx.replicaCount }}

    - name: Create Nginx index.html files
      copy:
        content: "Response from Server {{ item }}"
        dest: "/opt/nginx{{ item }}/index.html"
        mode: '0644'
      with_sequence: start=1 end={{ containers.nginx.replicaCount }}

    ## Starting Deploy process
    - name: Create directories for Docker Compose and configurations
      file:
        path: "{{ item }}"
        state: directory
        mode: '0755'
      with_items:
        - /opt/app
        - /opt/haproxy

    - name: Generate docker-compose.yml
      template:
        src: templates/docker-compose.yml.j2
        dest: /opt/app/docker-compose.yml
        mode: '0644'

    - name: Generate HAProxy configuration
      template:
        src: templates/haproxy.cfg.j2
        dest: /opt/haproxy/haproxy.cfg
        mode: '0644'

    - name: Start Docker Compose services
      shell: |
        docker-compose -f /opt/app/docker-compose.yml up -d --force-recreate
      args:
        chdir: /opt/app

    # It can be used as a mode if more control is needed but this will require more packages to be installed
    # - name: Start Docker Compose services
    #   docker_compose:
    #     project_src: /opt/app
    #     state: present
    #     restarted: true