【SpringCloud】（十）：高可用 Eureka

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提高系统的可靠性，我们使用Eureka集群，搭建的过程很简单，在Eureka工程的配置文件application.yml中进行配置。

1.使Eureka之间相互注册

2.用户微服务，注册到任意一个Eureka Server上都会进行同步。

Eureka 配置文件application.yml

Peer Awareness：同伴意识。

spring:application:name: EUREKA-HA
---
server:port: 8761
spring:profiles: peer1
eureka:instance:hostname: peer1client:serviceUrl:defaultZone: http://peer2:8762/eureka/,http://peer2:8763/eureka/---
server:port: 8762
spring:profiles: peer2
eureka:instance:hostname: peer2client:serviceUrl:defaultZone: http://peer1:8761/eureka/,http://peer3:8763/eureka/
---
server:port: 8763
spring:profiles: peer3
eureka:instance:hostname: peer3client:serviceUrl:defaultZone: http://peer1:8761/eureka/,http://peer2:8762/eureka/

启动类

package com.dynamic.cloud;import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;@SpringBootApplication
@EnableEurekaServer//	声明一个server：@EnableEurekaServer
public class EurekaApplication 
{public static void main( String[] args ){SpringApplication.run(EurekaApplication.class, args);    	}
}

去掉POM.xml中的认证依赖

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

用户微服务配置文件application.yml将服务注册到Eureka

eureka:client:serviceUrl:defaultZone: http://peer1:8761/eureka/ #http://user:pass123@localhost:8761/eurekainstance:prefer-ip-address: trueinstance-id: ${spring.application.name}:${spring.application.instance_id:${server.port}}

修改计算机的host配置

win + r -----> drivers ------> etc ------>hosts