Flask Gunicorn Nginx

Python

apt install python3-pip
pip3 install virtualenv
virtualenv venv
. venv/bin/activate &&&& deactivate

Flask

pip install Flask
vim jav.py

from flask import Flask
app = Flask(__name__)

@app.route('/')
def hello_world():
    return 'Hello, World!'

export FLASK_APP=jav.py
flask run # default 127.0.0.1:5000
flask run --host=0.0.0.0 # external ip access

Gunicorn

pip install gunicorn
gunicorn -w 4 -b 127.0.0.1:4000 jav:app --reload --daemon
--reload is for auto reload app when code changes.

Nginx

apt-get install nginx
cat /etc/nginx/nginx.conf

http {
    server {
        listen 80; # 443 for https
        server_name 104.156.245.172; # vultr ip

        location / {
                proxy_pass http://127.0.0.1:4000; # gunicorn 
                proxy_set_header Host $host;
                proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        }
    }
    ..........
}

nginx -t # test conf file
nginx # start service
nginx -s reload

Domain

• Default Freenom Setting without CloudFlare.
  

• With CloudFlare DNS.
  

Architecture

• Without CloudFlare.
  

• With CloudFlare.
  

Thanks!