Spring Boot demo app

This is a demo application used in the Prometheus Udemy training, This demonstrates the use of spring boot 2 with micrometer and prometheus to generate app metrics and custom metrics.

Demo

Build

docker build -t spring-demo-app .

Run

docker run --rm -p 8080:8080 --name spring-demo-app spring-demo-app

Oneliner

Build and Run the container via docker build -t spring-demo-app . && docker run --rm -p 8080:8080 --name spring-demo-app spring-demo-app

Access

App

http://localhost:8080/api/demo http://localhost:8080/api/delayed/demo

Prometheus metrics

http://localhost:8080/actuator/prometheus

Queries

Requests/s globally

rate(http_server_requests_seconds_count[5m])

Requests/s for the demo app

rate(http_server_requests_seconds_count{uri="/api/demo",status="200"}[5m])

Custom metric

runCounter_total{application="prometheus-demo",job="spring_boot_demo_app"}

Requests duration for the delayed demo app

rate(http_server_requests_seconds_sum{uri="/api/delayed/demo",status="200"}[2m])