This is a very basic Spring Boot application that exposes a web application at http://localhost:8080/

Run it as follows:

$ ./mvnw spring-boot:run

The application is configured to expose a Prometheus endpoint at http://localhost:8080/actuator/prometheus

If you don't have a Prometheus at hand, simply download it, unzip it somewhere and start with:

$ ./prometheus --config.file=`pwd`/prometheus.yml

Or you can configure your own Prometheus by adding a scrape config section as follows:

  - job_name: 'my-spring-boot-app'

    static_configs:
    - targets: ['127.0.0.1:8080']
    metrics_path: /actuator/prometheus

Once that is done, you can run reliably as follows (you need at least reliably 0.23.0):

# refresh indicators every 10s
$ reliably slo agent -i10 -m reliably.yaml

$ reliably slo report -w -m reliably.yaml

Refreshing SLO report every 3 seconds. Press CTRL+C to quit.
                                                       Current  Objective  / Time Window     Type     Trend      
  Service #1: my spring boot app                  
  ✅ 99% of requests return 2xx over last 1 hour        99.42%        99%  / 1h0m0s                   ✕ ✕ ✕ ✕ ✓