Ejercicio 3: Desplegando aplicaciones flask con Apache/Nginx + uwsgi

En esta tarea se usa la aplicación Guestbook.

Crear venv

mkdir venv
cd venv
sudo apt update
sudo apt install python3-venv
python3 -m venv .
source bin/activate

Descargar Guestbook

sudo apt install git
git clone https://github.com/josedom24/guestbook.git
pip install -r requirements.txt
sudo apt install redis

Fichero wsgi

/home/vagrant/guestbook/app/wsgi.py

from app import prog as application

Instalar uwsgi

sudo apt install libpython3.9-dev build-essential
pip install uwsgi

Probar funcionamiento

uwsgi --http :8080 --chdir /home/vagrant/guestbook/app --wsgi-file wsgi.py --process 4 --threads 2 --master

Creo /home/vagrant/guestbook/app/guestbook.ini:

[uwsgi]
http = :8080
chdir = /home/vagrant/guestbook/app
wsgi-file = wsgi.py
processes = 4
threads = 2

Ejecuto:

uwsgi guestbook.ini

Pruebo que funciona:

Crear unidad systemd

/etc/systemd/system/uwsgi-guestbook.service:

[Unit]
Description=uwsgi-guestbook
After=network.target

[Install]
WantedBy=multi-user.target

[Service]
User=www-data
Group=www-data
Restart=always

ExecStart=/home/vagrant/venv/bin/uwsgi /home/vagrant/guestbook/app/guestbook.ini
ExecReload=/bin/kill -s HUP $MAINPID
ExecStop=/bin/kill -s TERM $MAINPID

WorkingDirectory=/home/vagrant/guestbook/app
Environment=PYTHONPATH='/home/vagrant/guestbook/app:/home/vagrant/venv/lib/python3.9/site-packages'

PrivateTmp=true

La activo e inicio:

sudo systemctl enable uwsgi-guestbook.service
sudo systemctl start uwsgi-guestbook.service

Pruebo que funciona:

Apache + uWSGI

sudo apt install apache2
sudo a2enmod proxy_http

Creo /etc/apache2/sites-available/guestbook.conf:

<VirtualHost *:80>

        ServerName www.guestbook-uwsgi.com
        DocumentRoot /home/vagrant/guestbook/app

        <Directory /home/vagrant/guestbook/app>
            Require all granted
        </Directory>

        ProxyPass / http://127.0.0.1:8080/
        ProxyPassReverse / http://127.0.0.1:8080/

</VirtualHost>

Lo habilito:

sudo a2ensite guestbook.conf

Reinicio Apache:

sudo systemctl restart apache2

Modifico mi /etc/hosts:

# ej3-apache-nginx-uwsgi resolutions
192.168.121.93 www.guestbook-uwsgi.com

Pruebo que funciona:

Nginx + uWSGI

sudo apt install nginx

Creo /etc/nginx/sites-available/guestbook.conf:

server {

    listen 80;
    server_name www.guestbook-uwsgi.com;
    root /home/vagrant/guestbook/app;

    location / {
        proxy_pass http://localhost:8080;
        include proxy_params;
    }

}

Lo habilito:

sudo ln -s /etc/nginx/sites-available/guestbook.conf /etc/nginx/sites-enabled

Reinicio Nginx:

sudo systemctl restart nginx

Pruebo que funciona: