搭建springcloud注册中心eureka以及admin监控

写该篇文章的目的是为了以后搭建微服务的时候避免踩坑

要求:搭建一个eureka-server注册中心,再构建两个eureka-client注册上去,然后再搭建admin服务注册到注册中心。实现在admin后管页面可观察已注册上去的服务

前提:使用的springboot版本为 2.2.2.RELEASE;cloud版本为:Hoxton.SR6、springboot-admin版本为2.2.2

项目已上传云盘,获取地址:

链接:https://pan.baidu.com/s/10icCd2VvQuD0dbuWUa8bUw 
提取码:asdf

一、搭建eureka-server注册中心

注意点有三个,分别是

1.pom导入依赖(下面是完整的pom文件) : springboot、eureka-server、spring cloud



    4.0.0
    
        org.springframework.boot
        spring-boot-starter-parent
        2.2.2.RELEASE
         
    
    com.zyy
    spring_boot_demo
    0.0.1-SNAPSHOT
    spring_boot_demo
    Demo project for Spring Boot
    
        8
    
    
        
            org.springframework.boot
            spring-boot-starter
        
        
            org.springframework.cloud
            spring-cloud-starter-netflix-eureka-server
        
        
            org.springframework.boot
            spring-boot-starter-test
            test
        
    
    
        
            
                org.springframework.cloud
                spring-cloud-dependencies
                Hoxton.SR6
                pom
                import
            
        
    
    
        
            
                org.springframework.boot
                spring-boot-maven-plugin
            
        
    


2. application.yml文件:

server:
  port: 8001
eureka:
  instance:
    hostname: localhost
  client:
    register-with-eureka: false
    fetch-registry: false
    service-url:
      defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/
  server:
    eviction-interval-timer-in-ms: 5000 #清理间隔(单位毫秒, 默认是60*1000)eureka server提出服务不可用的时间窗
    enable-self-preservation: false #默认为true,设置为false,关闭自我保护
    #eureka server: 在运行期间会去统计心跳失败比例在15分钟之内是否低于85%
    renewal-percent-threshold: 0.85 #默认0.85  指定自我保护机制的开启阈值

3. 启动类:添加@EnableEurekaServer注解

package com.zyy.spring_boot_demo;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;

@SpringBootApplication
@EnableEurekaServer
public class SpringBootDemoApplication {

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

}

二、搭建eureka-client客户端,注册在eureka上面

1.pom文件(主要依赖):

        
            org.springframework.boot
            spring-boot-starter-web
        
        
            org.springframework.cloud
            spring-cloud-starter-netflix-eureka-client
        
        
        
            de.codecentric
            spring-boot-admin-starter-client
            2.2.2
        

2.application.yml:

spring:
  application:
    name: zyy-client-one
server:
  port: 8002
eureka:
  client:
    service-url:
      defaultZone: http://localhost:8001/eureka
# 下面的配置作为spring admin使用      
management:
  # 开启所有监控终端
  endpoints:
    web:
      exposure:
        include: "*"
  endpoint:
    health:
      show-details: always

3. 启动类: 添加@EnableEurekaClient注解表示为eureka客户端

package com.zyy.myeurekaclient;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;


@SpringBootApplication
@EnableEurekaClient
public class MyeurekaclientApplication {

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

}

三、搭建admin-server服务,同时注册在eureka上面

1.pom文件(完整的):导入依赖为springboot,spring-security,spring-actuator,eureka-client,springcloud



    4.0.0
    
        org.springframework.boot
        spring-boot-starter-parent
        2.2.2.RELEASE
         
    
    com.zyy
    myadmin
    0.0.1-SNAPSHOT
    myadmin
    Demo project for Spring Boot
    
        8
    
    
        
            org.springframework.boot
            spring-boot-starter
        
        
            org.springframework.boot
            spring-boot-starter-web
        
        
        
            org.springframework.boot
            spring-boot-starter-security
        
        
        
            org.springframework.boot
            spring-boot-starter-actuator
        
        
        
            de.codecentric
            spring-boot-admin-starter-server
            2.2.2
        
        
        
            org.springframework.cloud
            spring-cloud-starter-netflix-eureka-client
        
        
            org.springframework.boot
            spring-boot-starter-test
            test
        
    
    
        
            
                org.springframework.cloud
                spring-cloud-dependencies
                Hoxton.SR6
                pom
                import
            
        
    
    
        
            
                org.springframework.boot
                spring-boot-maven-plugin
            
        
    


2. application.yml

spring:
  # 设置登录admin的账户密码  admin后台地址为 http://localhost:8004
  security:
    user:
      name: admin
      password: admin
  application:
    name: zyy-client-adminserver
server:
  port: 8004
eureka:
  client:
    service-url:
      defaultZone: http://localhost:8001/eureka
    registry-fetch-interval-seconds: 10

management:
  # 开启所有监控终端
  endpoints:
    web:
      exposure:
        include: "*"
  endpoint:
    health:
      show-details: always

3. 启动类: 添加@EnableAdminServer 注解 以及 @EnableEurekaClient注解

package com.zyy.myadmin;

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 MyadminApplication {

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

}

四、效果展示

启动euereka-server后,再启动其他服务,spring-admin也是作为eureka客户端注册在eureka注册中心。那admin后台能监控到注册中心上面的其他服务的原因是:

1. 服务都注册在注册中心上,admin可以获取注册中心上面的服务

2. eureka-client服务的pom都导入了下面的依赖,其被标注为一个admin 客户端,服务启动后能够被admin服务端监控。


    de.codecentric
    spring-boot-admin-starter-client
    2.2.2

访问 http://localhost:8001

搭建springcloud注册中心eureka以及admin监控_第1张图片

访问 http://localhost:8004/

输入账号密码 admin 

搭建springcloud注册中心eureka以及admin监控_第2张图片

五、其他问题

本次是简单地搭建了eureka注册中心 和 admin服务监控 ,没有涉及到业务逻辑,也比较简单。若按照教程出现问题,请确认maven依赖是否正确,版本号。

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