Ejercicio 2: Desplegando aplicaciones flask con Apache + gunicorn

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 Gunicorn

pip install gunicorn

Probar funcionamiento

gunicorn -w 2 -b :8080 wsgi

Crear unidad systemd

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

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

[Install]
WantedBy=multi-user.target

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

ExecStart=/home/vagrant/venv/bin/gunicorn -w 2 -b :8080 wsgi
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 gunicorn-guestbook.service
sudo systemctl start gunicorn-guestbook.service

Pruebo que funciona:

Apache + Gunicorn

sudo apt install apache2
sudo a2enmod proxy_http

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

<VirtualHost *:80>

        ServerName www.guestbook-gunicorn.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:

# ej2-guestbook-gunicorn resolutions
192.168.121.2 www.guestbook-gunicorn.com

Pruebo que funciona:

Nginx + Gunicorn

sudo apt install nginx

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

server {

    listen 80;
    server_name www.guestbook-gunicorn.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: