Monitoring your application by using Spring Boot Actuator Endpoint is slightly difficult. Because, if you have ‘n’ number of applications, every application has separate actuator endpoints, thus making monitoring difficult. Spring Boot Admin Server is an application used to manage and monitor your Microservice application.
To handle such situations, CodeCentric Team provides a Spring Boot Admin UI to manage and monitor all your Spring Boot application Actuator endpoints at one place.
For building a Spring Boot Admin Server we need to add the below dependencies in your build configuration file.
Maven users can add the below dependencies in your pom.xml file −
<dependency>
<groupId>de.codecentric</groupId>
<artifactId>spring-boot-admin-server</artifactId>
<version>1.5.5</version>
</dependency>
<dependency>
<groupId>de.codecentric</groupId>
<artifactId>spring-boot-admin-server-ui</artifactId>
<version>1.5.5</version>
</dependency>
Gradle users can add the below dependencies in your build.gradle file −
compile group: ‘de.codecentric’, name: ‘spring-boot-admin-server’, version: ‘1.5.5’
compile group: ‘de.codecentric’, name: ‘spring-boot-admin-server-ui’, version: ‘1.5.5’
Add the @EnableAdminServer annotation in your main Spring Boot application class file. The @EnableAdminServer annotation is used to make your as Admin Server to monitor all other microservices.
package com.tecklearn.adminserver;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import de.codecentric.boot.admin.config.EnableAdminServer;

@SpringBootApplication
@EnableAdminServer
public class AdminserverApplication {
public static void main(String[] args) {
SpringApplication.run(AdminserverApplication.class, args);
}
}
Now, define the server.port and application name in application.properties file a shown −
server.port = 9090
spring.application.name = adminserver
For YAML users, use the following properties to define the port number and application name in application.yml file.
server:
port: 9090
spring:
application:
name: adminserver
The build configuration file is given below.
For Maven users – pom.xml
<?xml version = “1.0” encoding = “UTF-8”?>
<project xmlns = “http://maven.apache.org/POM/4.0.0”
xmlns:xsi = “http://www.w3.org/2001/XMLSchema-instance”
xsi:schemaLocation = “http://maven.apache.org/POM/4.0.0
http://maven.apache.org/xsd/maven-4.0.0.xsd”>

<modelVersion>4.0.0</modelVersion>
<groupId>com.tecklearn</groupId>
<artifactId>adminserver</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>

<name>adminserver</name>
<description>Demo project for Spring Boot</description>

<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.9.RELEASE</version>
<relativePath /> <!– lookup parent from repository –>
</parent>

<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>

<dependency>
<groupId>de.codecentric</groupId>
<artifactId>spring-boot-admin-server</artifactId>
<version>1.5.5</version>
</dependency>

<dependency>
<groupId>de.codecentric</groupId>
<artifactId>spring-boot-admin-server-ui</artifactId>
<version>1.5.5</version>
</dependency>

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>

<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>

</project>
For Gradle users – build.gradle file
buildscript {
ext {
springBootVersion = ‘1.5.9.RELEASE’
}
repositories {
mavenCentral()
}
dependencies {
classpath(“org.springframework.boot:spring-boot-gradle-plugin:${springBootVersion}”)
}
}

apply plugin: ‘java’
apply plugin: ‘eclipse’
apply plugin: ‘org.springframework.boot’

group = ‘com.tecklearn’
version = ‘0.0.1-SNAPSHOT’
sourceCompatibility = 1.8
repositories {
mavenCentral()
}
dependencies {
compile(‘org.springframework.boot:spring-boot-starter’)
compile group: ‘de.codecentric’, name: ‘spring-boot-admin-server’, version: ‘1.5.5’
compile group: ‘de.codecentric’, name: ‘spring-boot-admin-server-ui’, version: ‘1.5.5’
testCompile(‘org.springframework.boot:spring-boot-starter-test’)
}
You can create an executable JAR file, and run the Spring Boot application by using the following Maven or Gradle commands −
For Maven, use the command shown here −
mvn clean install
After “BUILD SUCCESS”, you can find the JAR file under target directory.
For Gradle, use the command shown here −
gradle clean build
After “BUILD SUCCESSFUL”, you can find the JAR file under build/libs directory.
Now, run the JAR file by using the command given below −
java –jar <JARFILE>
Now, the application has started on the Tomcat port 9090 as shown here −

Now hit the below URL from your web browser and see the Admin Server UI.
http://localhost:9090/

Spring Boot – Admin Client

For monitoring and managing your microservice application via Spring Boot Admin Server, you should add the Spring Boot Admin starter client dependency and point out the Admin Server URI into the application properties file.
Note − For monitoring an application, you should enable the Spring Boot Actuator Endpoints for your Microservice application.
First, add the following Spring Boot Admin starter client dependency and Spring Boot starter actuator dependency in your build configuration file.
Maven users can add the following dependencies in your pom.xml file −
<dependency>
<groupId>de.codecentric</groupId>
<artifactId>spring-boot-admin-starter-client</artifactId>
<version>1.5.5</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
Gradle users can add the following dependencies in your build.gradle file.
compile group: ‘de.codecentric’, name: ‘spring-boot-admin-starter-client’, version: ‘1.5.5’
compile(‘org.springframework.boot:spring-boot-starter-actuator’)
Now, add the Spring Boot Admin Server URL into your application properties file.
For properties file users, add the following properties in the application.properties file.
spring.boot.admin.url = http://localhost:9090/
For YAML users, add the following property in application.yml file.
spring:
boot:
admin:
url: http://localhost:9000/
Now, create an executable JAR file, and run the Spring Boot application by using the following Maven or Gradle commands.
For Maven, you can use the command as shown −
mvn clean install
After “BUILD SUCCESS”, you can find the JAR file under the target directory.
For Gradle, you can use the command as shown −
gradle clean build
After “BUILD SUCCESSFUL”, you can find the JAR file under the build/libs directory.
Now, run the JAR file by using the command shown −
java –jar <JARFILE>
Now, the application has started on the Tomcat port 9090 as shown −

Now hit the following URL from your web browser and see your spring Boot application is registered with Spring Boot Admin Server.
http://localhost:9090/

Now, click the Details button and the see the actuator endpoints in Admin Server UI.

So, this brings us to the end of blog. This Tecklearn ‘How to Build Spring Boot Admin Server and Client’ blog helps you with commonly asked questions if you are looking out for a job in Java Programming. If you wish to learn Spring Boot and build a career Java Programming domain, then check out our interactive, Java and JEE Training, that comes with 24*7 support to guide you throughout your learning period. Please find the link for course details:

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