トップ > Raspberry Pi > There are very useful descriptions out there. I followed their instruction.

There are very useful descriptions out there. I followed their instruction.

Raspberry Pi

You should check them out.
How To Serve Flask Applications with uWSGI and Nginx on Ubuntu 16.04 | DigitalOcean

How To Serve Flask Applications with uWSGI and Nginx on Ubuntu 14.04+ · GitHub

This is my records how I did it.

OS: Rasbian (Jessie-lite)
Python 2.7

1. Install and Configure VirtualEnv and VirtualEnvWrapper

pi@raspberrypi:~ $ sudo apt-get update
pi@raspberrypi:~ $ sudo apt-get install python-pip python-dev
pi@raspberrypi:~ $ sudo pip install virtualenv virtualenvwrapper
pi@raspberrypi:~ $ echo "export WORKON_HOME=~/.virtualenvs" >> ~/.bashrc
pi@raspberrypi:~ $ echo "source /usr/local/bin/virtualenvwrapper.sh" >> ~/.bashrc
pi@raspberrypi:~ $ source ~/.bashrc

2. Create the virtual environment (flaskappenv) 

pi@raspberrypi:~ $ mkvirtualenv flaskappenv

You are now in the your environment
(flaskappenv)pi@raspberrypi:~ $

3. Install Flask and uWSGI under the flaskappenv

(flaskappenv)pi@raspberrypi:~$ pip install uwsgi flask

4. Set up a Flask Application (flaskapp)

(flaskappenv)pi@raspberrypi:~ $ cd ~
(flaskappenv)pi@raspberrypi:~ $ mkdir flaskapp
(flaskappenv)pi@raspberrypi:~flaskapp $ cd flaskapp/
(flaskappenv)pi@raspberrypi:~flaskapp $ vi flaskapp.py
  • flaskapp.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')

5. Create the WSGI Entry Point

(flaskappenv)pi@raspberrypi:~ $ vim ~/flaskapp/wsgi.py
  • wsgi.py
from flaskapp import app

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

6. We're now done with our virtual environment, so we can deactivate it:

(flaskappenv)pi@raspberrypi:~ $ deactivate

7. Creating a uWSGI Configuration File under the system's Python environment

pi@raspberrypi:~ $ vim ~/flaskapp/flaskapp.ini
  • flaskapp.ini
[uwsgi]
module = wsgi:app

master = true
processes = 5

socket = flaskapp.sock
chmod-socket = 660
vacuum = true

die-on-term = true
pi@raspberrypi:~ $ sudo vim /etc/systemd/system/flaskapp.service
  • flaskapp.service
[Unit]
Description=uWSGI instance to serve flaskapp
After=network.target

[Service]
User=pi
Group=www-data
WorkingDirectory=/home/pi/flaskapp
Environment="PATH=/home/pi/.virtualenvs/flaskappenv/bin"
ExecStart=/home/pi/.virtualenvs/flaskappenv/bin/uwsgi --ini flaskapp.ini

[Install]
WantedBy=multi-user.target
pi@raspberrypi:~ $ sudo systemctl start flaskapp
pi@raspberrypi:~ $ sudo systemctl enable flaskapp

8. Install Nginx and Configuring Nginx to Proxy Requests

pi@raspberrypi:~ $ sudo apt-get install python-pip python-dev nginx
pi@raspberrypi:~ $ sudo vim /etc/nginx/sites-available/flaskapp
  • /etc/nginx/sites-available/flaskapp
server {
    listen 80;
    server_name localhost;

    location / {
        include uwsgi_params;
        uwsgi_pass unix:/home/pi/flaskapp/flaskapp.sock;
    }
}
pi@raspberrypi:~ $ sudo ln -s /etc/nginx/sites-available/flaskapp /etc/nginx/sites-enabled
pi@raspberrypi:~ $ cd /etc/nginx/sites-available
pi@raspberrypi:/etc/nginx/sites-available $ sudo mv default default.back
pi@raspberrypi:~ $ cd ~
pi@raspberrypi:~ $ sudo nginx -t
pi@raspberrypi:~ $ sudo systemctl restart nginx
sudo usermod -aG www-data pi
sudo chown -R pi:www-data /home/pi/flaskapp/*

9. You should now be able to go to your server's domain name or IP address in your web browser:
http://server_domain_or_IP
In my case, http://raspberrypi.local

10. check you have the following files in the directory "~/flaskapp" IF http://raspberrypi.local did not show Hello There!

flaskapp.ini
flaskapp.py
flaskapp.pyc
flaskapp.sock
wsgi.py
wsgi.pyc