Run Flask apps as services and manage them with NGINX

Run Flask apps as services and manage them with NGINX 

sudo apt install python3-pip

sudo apt install nginx

sudo adduser --home=/opt/kobros --disabled-password --gecos "Kobros" kobros

sudo su - kobros

mkdir company_app

cd company_app

python3 -m venv py-env

source py-env/bin/activate

pip3 install gunicorn flask

nano app.py

-------------------------- FILE --------------------------

from flask import Flask

app = Flask(__name__)

@app.route(‘/’)

def hello_world():

     return "<center>Hello World! Uooohh Mantaapp</center>"

    

if __name__ == ‘__main__’:

     app.run(debug=True,host=’0.0.0.0')

------------------------------------------------------------

nano wsgi.py

-------------------------- FILE --------------------------

from app import app

if __name__ == “__main__”:

     app.run()

------------------------------------------------------------

python3 app.py

gunicorn --bind 0.0.0.0:5000 wsgi:app

deactivate

sudo nano /etc/systemd/system/company_app.service

-------------------------- FILE --------------------------

[Unit]

Description=App to serve my company website

After=network.target

[Service]

User=kobros

Group=kobros

WorkingDirectory=/opt/kobros/company_app

Environment=”PATH=/opt/kobros/company_app/py-env/bin”

ExecStart=/opt/kobros/company_app/py-env/bin/python3 /opt/kobros/company_app/py-env/bin/gunicorn wsgi:app

[Install]

WantedBy=multi-user.target

------------------------------------------------------------

sudo systemctl start company_app

sudo nano /etc/nginx/sites-available/company_app

-------------------------- FILE --------------------------

server {

    listen 80;

    listen [::]:80;

    location /company/ {

        include proxy_params;

        proxy_pass http://localhost:8000/;

        proxy_set_header Host $host;

        proxy_set_header X-Real-IP $remote_addr;

    }

    location /profile/ {

        include proxy_params;

        proxy_pass http://localhost:8001/;

        proxy_set_header Host $host;

        proxy_set_header X-Real-IP $remote_addr;

    }

}

------------------------------------------------------------

sudo rm /etc/nginx/sites-enabled/default

sudo ln -s /etc/nginx/sites-available/company_app /etc/nginx/sites-enabled

sudo nginx -t

systemctl restart nginx