Spring Boot Admin

1. What is spring boot admin?

Spring boot admin manages and monitors spring boot applications. The project is built using codecentric's spring-boot-admin-starter-server.

2. Registering Client Applications

In order to let spring boot admin monitor other applications, register the client applications by adding application url to the application.yml, for example: to register program service, add the following to application.yml:

spring.boot.admin.client.url: http://localhost:8082 
management.endpoints.web.exposure.include: "*"

As with Spring Boot 2 most of the endpoints aren’t exposed via http by default, we expose all of them. For production you should carefully choose which endpoints to expose.

Add the following dependencies to program service:

<dependency>
	<groupId>de.codecentric</groupId>
	<artifactId>spring-boot-admin-starter-client</artifactId>
	<version>2.1.3</version>
</dependency>
<dependency>
	<groupId>org.springframework.boot</groupId>
	<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
	<groupId>org.springframework.boot</groupId>
	<artifactId>spring-boot-starter-webflux</artifactId>
</dependency>

Spring boot admin reference guide: https://codecentric.github.io/spring-boot-admin/2.1.3/#_what_is_spring_boot_admin

3. Configuration with a Dockerized Spring Boot Service

The environment variable SPRING_BOOT_ADMIN_CLIENT_URL must be defined with the url of the spring-boot-admin server url.

As an example, to run the spring boot service car_service while registering it with the spring-boot-admin server at https://my-spring-boot-admin-server.org , the following command must be run:

docker run -e "SPRING_BOOT_ADMIN_CLIENT_URL=https://my-spring-boot-admin-server.org" car_service

The following is an example docker-compose.yml, where the Dockerfile.car_service is the dockerfile for the car_service

version: '3.2'
services:
  car_service:
    build:
      context: ./
      dockerfile: Dockerfile.car_service
    environment:
      SPRING_BOOT_ADMIN_CLIENT_URL: "https://my-spring-boot-admin-server"