eureka-server自己也是一个微服务，所以eureka-server在启动的时候也会将自己注册到eureka上。eureka集群的时候，会将多个eureka相互注册，这个时候，defaultZone的值会有多个，用逗号隔开。

<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd"><parent><artifactId>cloud-demo</artifactId><groupId>com.xkj.org</groupId><version>1.0-SNAPSHOT</version></parent><modelVersion>4.0.0</modelVersion><artifactId>eureka-server</artifactId><properties><maven.compiler.source>8</maven.compiler.source><maven.compiler.target>8</maven.compiler.target></properties><dependencies><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-netflix-eureka-server</artifactId></dependency></dependencies>
</project>

server:port: 10086
spring:application:name: eureka-server #eureka服务名称
eureka:client:service-url:defaultZone: http://localhost:10086/eureka #eureka地址信息，

@SpringBootApplication
@EnableEurekaServer
public class EurekaApplication {public static void main(String[] args) {SpringApplication.run(EurekaApplication.class, args);}
}