Redoing a tutorial using Ansible https://www.digitalocean.com/community/tutorials/how-to-serve-flask-applications-with-gunicorn-and-nginx-on-ubuntu-20-04

inventory

## my box VMs ##
[DigitialOceanExample]
PPP.PPP.PPP.PPP (redacted by author)

myproject.py

from flask import Flask
app = Flask(__name__)

@app.route("/")
def hello():
    return "<h1 style='color:blue'>Hello There!</h1>"

if __name__ == "__main__":
    app.run(host='0.0.0.0')

ubuntu.yml

---
- hosts: DigitialOceanExample
  become: yes
  tasks: 
  - name: Update apt-get repo and cache
    apt: 
      update_cache: yes 
      force_apt_get: yes 
      cache_valid_time: 3600

  - name: Install a list of packages
    apt:
      pkg:
      - python3-pip
      - python3-dev
      - build-essential
      - libssl-dev
      - libffi-dev
      - python3-setuptools
      - python3-venv

  - name: ensure a directory exists or create it
    file: 
      path: /myproject
      state: directory

  - name: Manually create the initial virtualenv
    command:
      cmd: python3 -m venv /myproject/myprojectenv
      creates: "/myproject/myprojectenv"

  - name: "install python packages with the local instance of pip"
    shell: "/myproject/myprojectenv/bin/pip3 install wheel flask gunicorn"

  - name: copy file to server
    copy: 
      src: "{{ item }}"
      dest: /myproject
    loop:
      - ./myproject.py

  - name: Install ufw
    apt:
      name: ufw
      update_cache: true

  - name: "Allow port 5000"
    shell:  "ufw allow 5000"

  - name: copy file to server
    copy: 
      src: ./wsgi.py
      dest: /myproject 

  - name: "starting gunicorn"
    shell: "/myproject/myprojectenv/bin/gunicorn --preload --bind 0.0.0.0:5000 wsgi:app"
    become: yes

wsgi.py

from myproject import app

if __name__ == "__main__":
    app.run()