Monitoring Spring Boot applications with Prometheus and Grafana

In order to compare the performance of different JDKs for reactive Spring Boot services, I made a setup in which a Spring Boot application is wrapped in a Docker container. This makes it easy to create different containers for different JDK's with the same Spring Boot application running in it. The Spring Boot application exposes metrics to Prometheus. Grafana can read these metrics and allows to make nice visualizations from it. This blog post describes the setup. A next post will show the results. You can download the code here (in the complete folder). To indicate how easy this is, getting this setup up and running and write this blog post took me less than 1.5 hours total. I did not have much prior knowledge on Prometheus and Grafana save for a single workshop at AMIS by Lucas Jellema.