Imagine you have a small web application and want to see what users are doing: who opened the home page and who clicked a button. In real DevOps work, tracking these actions helps you understand user behavior and catch issues early.

You create a simple Flask app that shows a welcome message and reacts when a button is clicked. Each action is recorded in a log file, giving you a first look at how logging works before connecting it to ELK for analysis.

What You Will Do

The app has two routes: one for the home page and one for a "button" click. Every time someone visits a route or clicks the button, an event is recorded in the log. This helps you see exactly what users are doing and provides a foundation for future analysis.

You create a Flask application object that handles routes and incoming requests. Then you set up logging using logging.basicConfig so all user actions are recorded in the file /logs/app.log, including the timestamp, event level, and message.

The two routes show how the app works: / returns a welcome message and logs when the home page is opened, while /click logs a button click and returns a text response. Finally, the server runs on all interfaces at port 5000, allowing you to test the app and see events in the log file.