微服務：整合 Spring Boot Admin - 集成Eureka注冊中心

一、前言

　　通過前面的學習，雖然我們已經可以在 Spring Boot Admin 中查看應用中 Actuator 的監控信息了，但是這種方式有一點不好的地方，就是每個被監控的服務都必須配置 Spring Boot Admin 的地址，還得引入依賴。為了解決這一問題我們通過Eureka注冊中心來解耦這一復雜的問題。
　　本節我們將 Spring Boot Admin 也注冊到 Eureka 中，然后自動獲取 Eureka 中注冊的服務信息來統一查看。

二、代碼演示

1、首先修改microservice-provider -> 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">
    <parent>
        <artifactId>microservice-minitor</artifactId>
        <groupId>com.microservice</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>microservice-provider</artifactId>

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

<!--        <dependency>-->
<!--            <groupId>de.codecentric</groupId>-->
<!--            <artifactId>spring-boot-admin-starter-client</artifactId>-->
<!--            <version>2.2.0</version>-->
<!--        </dependency>-->

    </dependencies>

</project>

 

2、修改microservice-provider -> application.yml

spring:
  application:
    name: microservice-provider
# boot: # admin: # client: # url: http://localhost:8888
server:
  port: 8101

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

eureka: instance: hostname: localhost client: register-with-eureka: true fetch-registry: true serviceUrl: defaultZone: http://localhost:8001/register/eureka/

3、修改 microservice-monitor-server -> pom.xml，添加Eureka客戶端依賴：

<?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">
    <parent>
        <artifactId>microservice-minitor</artifactId>
        <groupId>com.microservice</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>microservice-monitor-server</artifactId>

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

        <dependency>
            <groupId>de.codecentric</groupId>
            <artifactId>spring-boot-admin-starter-server</artifactId>
            <version>2.2.0</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>

    </dependencies>

</project>

4、修改 microservice-monitor-server ->application.xml，添加Eureka客戶端配置

server:
  port: 8888
spring:
  application:
    name: SpringBootAdmin
  boot:
    admin:
      ui:
        title: SpringBootAdmin-Server
        
eureka: instance: hostname: localhost client: register-with-eureka: true fetch-registry: true serviceUrl: defaultZone: http://localhost:8001/register/eureka/

三、運行測試

1、Eureka 注冊中心：

 

 

 Spring Boot Admin:

 

 

四、總結

　　通過上面的示例，我們可以知道，我們只需要將Spring Boot Admin 注冊到Eureka注冊中心里面，那么 Spring Boot Admin就可以通過Eureka獲取到每個微服務的地址以及actuator暴露出來的地址。Spring Boot Admin就可以監控每個微服務實例了。