上文中的被监控端微服务，我们引入了spring-boot-admin-starter-client依赖，这样一来，貌似对我们的微服务有某种侵入性；在实际应用中，我们的微服务都是注册到eureka server服务器，因此监控服务端spring-boot-admin可以从注册服务器获取我们的微服务列表，而不用每一个监控端微服务都引入监控服务端的url信息，也不用引入spring-boot-admin-starter-client依赖（当然需要引入spring-boot-starter-actuator依赖）

改造微服务ralab-admin

• Add the Maven spring-cloud-starter-netflix-eureka-client denpendencys
• Add @EnableEurekaClient to the application class
• Config eureka server info to application.yml file
  其pom.xml文件如下：

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  <?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 https://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.1.8.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <groupId>com.ralab</groupId> <artifactId>ralab-admin</artifactId> <version>0.0.1-SNAPSHOT</version> <name>ralab-admin</name> <description>Demo project for Spring Boot</description> <properties> <java.version>1.8</java.version> <spring-boot-admin.version>2.1.5</spring-boot-admin.version> <spring-cloud.version>Greenwich.SR3</spring-cloud.version> </properties> <dependencies> <dependency> <groupId>de.codecentric</groupId> <artifactId>spring-boot-admin-starter-server</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> </dependencies> <dependencyManagement> <dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-dependencies</artifactId> <version>${spring-cloud.version}</version> <type>pom</type> <scope>import</scope> </dependency> <dependency> <groupId>de.codecentric</groupId> <artifactId>spring-boot-admin-dependencies</artifactId> <version>${spring-boot-admin.version}</version> <type>pom</type> <scope>import</scope> </dependency> </dependencies> </dependencyManagement> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>

RalabAdminApplication文件

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package com.ralab.ralabadmin;

import de.codecentric.boot.admin.server.config.EnableAdminServer;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;

@SpringBootApplication
@EnableAdminServer
@EnableEurekaClient
public class RalabAdminApplication {

    public static void main(String[] args) {
        SpringApplication.run(RalabAdminApplication.class, args);
    }

}

application.yml文件

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server:
  port: 8080
spring:
  application:
    name: service-admin

eureka:
  instance:
    # ip-address: 127.0.0.1
    prefer-ip-address: true # 补充
    instance-id: ${spring.application.name}:${spring.cloud.client.ip-address}:${server.port}
  client:
    serviceUrl:
      defaultZone: http://localhost:8761/eureka/

然后运行eureka server服务器,运行被监控微服务，运行上面的监控微服务,打开http://127.0.0.1:8080

记得被监控的微服务加入依赖

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

添加配置

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management:
  endpoints:
    web:
      exposure:
        include: '*'
  endpoint:
    health:
      show-details: always