playbook.yml

 -  name: Deploy a web application
    hosts: db_and_web_server1,db_and_web_server2
    tasks:
      
      - name: Install all required dependencies
        raw: sudo apt-get install "{‌{ item }}"
        with_items:
          - python
          - python-setuptools
          - python-dev
          - build-essential
          - python-pip

      - name: Install MYSQL database
        raw: sudo apt-get install "{‌{ item }}"
        with_items:
          - mysql-server
          - mysql-client
      
      - name: Start MYSQL Service
        service:
          name: mysql
          state: started
          enabled: yes
      
      - name: Create Application database
        mysql_db: name=employee_db state=present
      
      - name: Create database User
        mysql_user:
          name: db_user
          password: Passw0rd
          priv: '*.*:ALL'
          state: present
          host: '%'
      
      - name: Install Python Flask Dependency
        pip:
          name: "{‌{ item }}"
          state: present
        with_items:
          - flask
          - flask-mysql
      
      - name: Copy Source code
        copy: src=/opt/app.py dest=/opt/app.py
      
      - name: Start web server
        shell: FLASK_APP=app.py nohup flask run --host=0.0.0.0 &