This is a simple Flask application that exposes metrics in Prometheus format using the prometheus_flask_exporter. To run the app, you need to have Python and pip installed on your machine, then install the required dependencies.

1. Activate your virtual environment (if not already activated)

source venv/bin/activate   # On macOS or Linux

2. Install required packages

python -m pip install flask prometheus_flask_exporter
python -m pip install requests

3. Start the flask application

python app.py

The different endpoints for the application are 127.0.0.1:5000/one, 127.0.0.1:5000/two, 127.0.0.1:5000/three, 127.0.0.1:5000/four and 127.0.0.1:5000/error.

4. In a new terminal, start the generator

python app-generator.py

It will be used in generating request for the Flask application at the different endpoints.

5. Send the metrics to a monitoring tool for visualization. You can do this with OpenTelemetry and SigNoz, read the article here.