springcloud,搭建eureka集群（已暂停维护更新，但大规模使用）

下面为单机版，后面为集群
一、在之前的父工程中新建module eureka服务1
eureka-server7001
eureka-server7002

二、引入pom

        <!-- https://mvnrepository.com/artifact/org.springframework.cloud/spring-cloud-starter-eureka-server -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
        </dependency>



        <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-web -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-web  -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>



        <!-- https://mvnrepository.com/artifact/org.projectlombok/lombok -->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-test -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
        </dependency>

三、写yml

server:
  port: 7001

eureka:
  instance:
    hostname: localhost  #eureka服务端的实例名字
  client:
    register-with-eureka: false    #表识不向注册中心注册自己
    fetch-registry: false   #表示自己就是注册中心，职责是维护服务实例，并不需要去检索服务
     service-url:
      defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/    #设置与eureka server交互的地址查询服务和注册服务都需要依赖这个地址
 

三、在主启动类加@EnableEurekaServer
启动项目。访问localhost:7001看到eureka客户端页面

下面是集群
一、测试将系统hosts修改下域名下

#在C:\Windows\System32\drivers\etc
127.0.0.1       eureka-server7001
127.0.0.1       eureka-server7002

二、分别在创建的两个项目的yml

7001服务器
server:
  port: 7001
spring:
  application:
    name: eureka-server7001
eureka:
  instance:
    hostname: eureka-server7001    #eureka服务端的实例名字  #eureka服务端的实例名字
  client:
    register-with-eureka: false  #表识不向注册中心注册自己
    fetch-registry: false  #表示自己就是注册中心，职责是维护服务实例，并不需要去检索服务
    service-url:
      defaultZone: http://eureka-server7002:7002/eureka/  #设置与eureka server交互的地址查询服务和注册服务都需要依赖这个地址

7002服务器

server:
  port: 7002
spring:
  application:
    name: eureka-server7002
eureka:
  instance:
    hostname: eureka-server7002    #eureka服务端的实例名字  #eureka服务端的实例名字
  client:
    register-with-eureka: false  #表识不向注册中心注册自己
    fetch-registry: false  #表示自己就是注册中心，职责是维护服务实例，并不需要去检索服务
    service-url:
      defaultZone: http://eureka-server7001:7001/eureka/  #设置与eureka server交互的地址查询服务和注册服务都需要依赖这个地址

三、将之前的项目注册到注册中心
1、重新设置添加pom

 <!-- https://mvnrepository.com/artifact/org.springframework.cloud/spring-cloud-starter-eureka-server -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>

2、修改yml

eureka:
  client:
    register-with-eureka: true
    fetchRegistry: true
    service-url:
      defaultZone: http://eureka-server7001:7001/eureka,http://eureka-server7001:7001/eureka #集群版

3、在启动类上加@EnableEurekaClient

启动项目测试是否注册进服务中心