springCloud(二)Erueka实现高可用

                 使用两个eureka注册中心实现注册中心

           

搭建

erueka 注册中心一 : eruekaServer

搭建工程，

项目目录

引入POM文件

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.16.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <groupId>com.jm</groupId>
    <artifactId>server</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>eruekaServer</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
        <spring-cloud.version>Greenwich.SR2</spring-cloud.version>
    </properties>

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

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

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

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

配置文件 

8801 为第一个端口， 8802 为第二个端口

spring:
  application:
    name: service-erueka-register

server:
  port: 8801
eureka:
  instance:
    hostname: 127.0.0.1
    prefer-ip-address: true
    leaseExpirationDurationInSeconds: 15
  client:
    register-with-eureka: false
    fetch-registry: false
    service-url:
      defaultZone: http://127.0.0.1:8802/eureka/

启动文件

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;
@EnableEurekaServer
@SpringBootApplication
public class EruekaServerApplication {

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

}

erueka 注册中心二 : eruekaServer2

配置文件

spring:
  application:
    name: service-erueka-register

server:
  port: 8802
eureka:
  instance:
    hostname: 127.0.0.1
    prefer-ip-address: true
    leaseExpirationDurationInSeconds: 15
  client:
    register-with-eureka: false
    fetch-registry: false
    service-url:
      defaultZone: http://127.0.0.1:8801/eureka/
      #http://${eureka.instance.hostname}:${server.port}/eureka/

客户端

配置文件

eureka:
  client:
    serviceUrl: #注册中心的注册地址
      defaultZone: http://127.0.0.1:8801/eureka/
      #也可以两个都注册，一个够了会相互注册，如 http://127.0.0.1:8801/eureka/, http://127.0.0.1:8802/eureka/
server:
  port: 8804  #服务端口号
spring:
  application:
    name: service-provider #服务名称--调用的时候根据名称来调用该服务的方法

启动

启动两个注册中心 

8801， 8802 端口都如下 ， 显示两个都注册成功

　

 再启动 客户端 

 github: https://github.com/szjomin/eruekaDemo

参考：

两个：https://www.cnblogs.com/Dev0ps/p/9899621.html

三个：https://blog.csdn.net/weixiaohuai/article/details/82499345