概述
随着开发周期的推移，项目会不断变大，切分出的服务也会越来越多，这时一个个的微服务构成了错综复杂的系统。对于各个微服务系统的健康状态、会话数量、并发数、服务资源、延迟等度量信息的收集就成为了一个挑战。Spring Boot Admin 应运而生，它正式基于这些需求开发出的一套功能强大的监控管理系统。
Spring Boot Admin 有两个角色组成，一个是 Spring Boot Admin Server，一个是 Spring Boot Admin Client，接下来就是实现 Spring Boot Admin 的搭建。
创建 Spring Boot Admin Server
创建一个工程名为 hello-spring-cloud-admin 的项目，pom.xml文件如下：
<?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> <parent> <groupId>com.ycq</groupId> <artifactId>hello-spring-cloud-dependencies</artifactId> <version>1.0.0-SNAPSHOT</version> <relativePath>../hello-spring-cloud-dependencies/pom.xml</relativePath> </parent> <artifactId>hello-spring-cloud-admin</artifactId> <packaging>jar</packaging> <name>hello-spring-cloud-admin</name> <dependencies> <!-- Spring Boot Begin --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-tomcat</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-webflux</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-actuator</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>org.jolokia</groupId> <artifactId>jolokia-core</artifactId> </dependency> <dependency> <groupId>de.codecentric</groupId> <artifactId>spring-boot-admin-starter-server</artifactId> </dependency> <!-- Spring Boot End --> <!-- Spring Cloud Begin --> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-zipkin</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId> </dependency> <!-- Spring Cloud End --> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> <configuration> <mainClass>com.ycq.hello.spring.cloud.admin.AdminApplication</mainClass> </configuration> </plugin> </plugins> </build> </project>
主要增加了 2 个依赖，org.jolokia:jolokia-core、de.codecentric:spring-boot-admin-starter-server
<dependency> <groupId>org.jolokia</groupId> <artifactId>jolokia-core</artifactId> </dependency> <dependency> <groupId>de.codecentric</groupId> <artifactId>spring-boot-admin-starter-server</artifactId> </dependency>
其中 spring-boot-admin-starter-server的版本号为：2.0.0，这里没写版本号是因为我已将版本号托管到 dependencies 项目中
Application
通过 @EnableAdminServer 注解开启 Admin 功能
package com.ycq.hello.spring.cloud.admin; 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 @EnableEurekaClient @EnableAdminServer public class AdminApplication { public static void main(String[] args) { SpringApplication.run(AdminApplication.class, args); } }
application.yml
设置端口号为：8084
spring: application: name: hello-spring-cloud-admin zipkin: base-url: http://localhost:9411 server: port: 8084 management: endpoint: health: show-details: always endpoints: web: exposure: # 注意：此处在视频里是 include: ["health", "info"] 但已无效了，请修改 include: health,info eureka: client: serviceUrl: defaultZone: http://localhost:8761/eureka/
主要增加了 Spring Boot Admin Server 的相关配置
management: endpoint: health: show-details: always endpoints: web: exposure: # 注意：此处在视频里是 include: ["health", "info"] 但已无效了，请修改 include: health,info
测试访问监控中心
打开浏览器访问：http://localhost:8084 会出现以下界面
