The application is a REST application with one endpoint:
http://localhost:8080/hello-world
It uses spring security with form login (admin/password).
Use maven to build the application:
mvn clean install
Start the application with docker-compose:
docker-compose up --build
This will start the following services:
- demo-app instance 1:
http://localhost:8080/hello-world - demo-app instance 2:
http://localhost:8081/hello-world - Redis
- Prometheus:
http://localhost:9090 - Grafana:
http://localhost:3000
The application instances will share their session data through Redis with help of Spring Session. You can try this by navigating to instance 1, logging in and then navigating to instance 2. You will still be logged in.
Micrometer is configured to publish data in a promotheus format on:
http://localhost:8080/actuator/prometheus
The prometheus server is configured to consume this data in the prometheus.yml.
You can use Grafana to visualize this data by adding a prometheus endpoint pointing to:
http://promotheus:9090