How to use Apache as Reverse Proxy using mod_proxy on Ubuntu

Update Server: apt update && apt upgrade -y

Install Apache: sudo apt install apache2

Adjusting Firewall: sudo ufw allow 'Apache'

Enabling Necessary Apache Modules: sudo a2enmod proxy proxy_http proxy_balancer lbmethod_byrequests sudo systemctl restart apache2

Creating Backend Test Servers: sudo apt install python3-pip sudo pip3 install Flask nano ~/backend1.py paste from flask import Flask app = Flask(name)

@app.route('/') def home(): return 'Hello world!'

cp ~/backend1.py ~/backend2.py nano ~/backend2.py update message return 'Howdy world!'

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FLASK_APP=/backend1.py flask run --port=8080 ]/dev/null 2]&1 & FLASK_APP=/backend2.py flask run --port=8081 ]/dev/null 2]&1 &

new terminal curl http://127.0.0.1:8080/ curl http://127.0.0.1:8081/

Modifying the Default Configuration to Enable Reverse Proxy: sudo nano /etc/apache2/sites-available/000-default.conf replace with

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[VirtualHost *:80] ProxyPreserveHost On

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

[/VirtualHost]

sudo systemctl restart apache2 ... https://www.youtube.com/watch?v=o8lUm6C4J4U