This project shows a simple integration of Keycloak 4 in Spring Boot 2 applications.

The following versions are used:

• Docker: 18.03.1-ce
• Docker-compose: 1.21.1
• Apache Maven: 3.5.3
• Spring Boot: 2.0.3.RELEASE
• Keycloak: 4.8.3.Final

First Keycloak and the database needs to be started via:

docker-compose -f keycloak/docker-compose.yml up

Use that URL in your browser to access the administration console of Keycloak. It is located at https://localhost:8180/auth. Connect using the Keycloak default administration user admin/admin [if it's the first time you login. Keycloak requires changing this password at first login. Since I mentioned it in docker-compose file this can be skipped]

Create a new Keycloak realm by importing the /keycloak/config/realm-export.json file. Create two users 'alice' and 'cooper' with student and teacher roles respectively.

After Keycloak started successfully, you can start the Spring Boot application in a separate terminal via

mvn package spring-boot:run

It is accessible on https://localhost:7070/management/v1/students. After accessing this url, the login page from Keycloak shows up. Use the credentials of a user(cooper/alice). Signing in with that user should redirect you back to the application, where as if the user has restricted access forbidden is shown.