SpringCloud-EureKa服务

1.搭建环境：JDK1.8+IDEA2017+MySQL8.0

2.项目模块结构

3.springcloud-eureka模块（服务器端）

（1）导入eureka sever服务依赖

    
        springcloud
        com.cloud
        1.0-SNAPSHOT
    
    4.0.0

    springcloud-eureka
    
        
        
            org.springframework.cloud
            spring-cloud-starter-eureka-server
            1.4.6.RELEASE
        

    

 （2）模块结构图

（3）编写yml文件进行配置

server:
  port: 7001
  #配置eureka的服务端实例名称
eureka:
  instance:
    hostname: localhost
  client:
    register-with-eureka: false  #是否向注册中心进行注册
    fetch-registry: false  #false表示这是一个注册中心
    service-url: #监控页面
      defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/

 （4）编写启动类加注解（springcloud_eureka_7001）

package com.cloud;

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

@SpringBootApplication
@EnableEurekaServer //开启EurekaServer服务端
public class springcloud_eureka_7001 {
    
    public static void main(String[] args) {
        SpringApplication.run ( springcloud_eureka_7001.class,args );
    }
}

4.编写客户端（即将提供者模块注册到eureka注册中心）

（1）导入依赖

 
         
             org.springframework.cloud
             spring-cloud-starter-eureka
             1.4.7.RELEASE
         
         
         
             org.springframework.boot
             spring-boot-starter-actuator
         

（2）编写yml文件

server:
  port: 8001
mybatis:
  mapper-locations: classpath:mybatis/mapper/*.xml
  type-aliases-package: com.cloud.pojo

spring:
  application:
    name: springcloud-provider-dept
  datasource:
    driver-class-name: com.mysql.jdbc.Driver
    url: jdbc:mysql://localhost:3306/db01?allowPublicKeyRetrieval=true&useSSL=false&useUnicode=true&characterEncoding=UTF-8
    username: root
    password: 123456
eureka:
  client:
    service-url:
       defaultZone: http://localhost:7001/eureka/
  instance: #修改默认描述信息
    instance-id: springcloud-provider-dept-8001
info:
  app.name: com.springcloud
  company.name: springboot.actuator

（3）修改启动类，添加注解

package com.cloud;

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

@SpringBootApplication
@EnableEurekaClient//表示该实例启动后会自动注册到eureka注册中心
public class Springcloudprovider8001 {
    public static void main(String[] args) {
        SpringApplication.run ( Springcloudprovider8001.class,args );
    }
}

（4）测试，先打开7001，再打开8001进行注册

 5.集群

（1）结构图

（2）各eureka1结构图

（3）eureka的yml文件

server:
  port: 7001
  #配置eureka的服务端实例名称，eureka7003.com，修改的文件地址"C:WindowsSystem32driversetchosts"
eureka:
  instance:
    hostname: eureka7001.com
  client:
    register-with-eureka: false  #是否向注册中心进行注册
    fetch-registry: false  #false表示这是一个注册中心
    service-url: #监控页面
    #单机：http://${eureka.instance.hostname}:${server.port}/eureka/
    #集群：关联
      defaultZone: http://eureka7003.com:7003/eureka/,http://eureka7002.com:7002/eureka/

 （4）eureka7002的yml文件

server:
  port: 7002
  #配置eureka的服务端实例名称
eureka:
  instance:
    hostname: eureka7002.com
  client:
    register-with-eureka: false  #是否向注册中心进行注册
    fetch-registry: false  #false表示这是一个注册中心
    service-url: #监控页面
      defaultZone: http://eureka7001.com:7001/eureka/,http://eureka7003.com:7003/eureka/

 （5）eureka7003的yml文件

server:
  port: 7003
  #配置eureka的服务端实例名称
eureka:
  instance:
    hostname: eureka7003.com
  client:
    register-with-eureka: false  #是否向注册中心进行注册
    fetch-registry: false  #false表示这是一个注册中心
    service-url: #监控页面
      defaultZone: http://eureka7001.com:7001/eureka/,http://eureka7002.com:7002/eureka/

（6）将8001提供者项目部署到集群，修改。yml文件即可

server:
  port: 8001
mybatis:
  mapper-locations: classpath:mybatis/mapper/*.xml
  type-aliases-package: com.cloud.pojo

spring:
  application:
    name: springcloud-provider-dept
  datasource:
    driver-class-name: com.mysql.jdbc.Driver
    url: jdbc:mysql://localhost:3306/db01?allowPublicKeyRetrieval=true&useSSL=false&useUnicode=true&characterEncoding=UTF-8
    username: root
    password: 123456
eureka:
  client:
    service-url:
       defaultZone: http://eureka7001.com:7001/eureka/,http://eureka7002.com:7002/eureka/,http://eureka7003.com:7003/eureka/
  instance: #修改默认描述信息
    instance-id: springcloud-provider-dept-8001
info:
  app.name: com.springcloud
  company.name: springboot.actuator

（7）测试