【SpringCloud】Eureka Server 单机 以及 集群搭建

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一、pom.xml

	<!--SpringCloud-->
	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>2.1.1.RELEASE</version>
		<relativePath/> <!-- lookup parent from repository -->
	</parent>

	<!--版本集合-->
	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
		<java.version>1.8</java.version>
		<spring-cloud.version>Finchley.RELEASE</spring-cloud.version>
	</properties>

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

		<!-- 修改后立即生效，热部署 -->
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-devtools</artifactId>
		</dependency>

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

	<!--spring cloud的依赖-->
	<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>

	<!--库-->
	<repositories>
		<repository>
			<id>spring-milestones</id>
			<name>Spring Milestones</name>
			<url>https://repo.spring.io/milestone</url>
			<snapshots>
				<enabled>false</enabled>
			</snapshots>
		</repository>
	</repositories>

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

二、application.yml

server: 
  port: 7001
 
eureka:
  instance:
    hostname: localhost 				# eureka服务端的实例名称
  client:
    register-with-eureka: false 		# false表示不向注册中心注册自己。
    fetch-registry: false 				# false表示自己端就是注册中心，我的职责就是维护服务实例，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、启动类

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

@SpringBootApplication
@EnableEurekaServer  //标记为server
public class SpringcloudEurekaServer7001Application {

	public static void main(String[] args) {
		SpringApplication.run(SpringcloudEurekaServer7001Application.class, args);
	}

}

四、启动服务

访问 http://localhost:7001

五、集群搭建

复制上面的项目,修改yml为如下：

server:
  port: 7001   # <----

eureka:
  instance:
    hostname: www.eureka7001.com  # <-----
  client:
    register-with-eureka: false
    fetch-registry: false
    service-url:
      defaultZone: http://www.eureka7001.com:7001/eureka/,http://www.eureka7002.com:7002/eureka/   # <-----

server:
  port: 7002  # <----

eureka:
  instance:
    hostname: www.eureka7002.com  # <-----
  client:
    register-with-eureka: false
    fetch-registry: false
    service-url:
      defaultZone: http://www.eureka7001.com:7001/eureka/,http://www.eureka7002.com:7002/eureka/ # <------

注意服务端口更改。修改本机的host文件，添加 www.eureka7001.com 和 www.eureka7002.com
分别启动两个服务器，成功访问页面，并且出现如下关联信息即可：