eureka-server项目工程搭建、linux集群部署

Eureka是Netflix开发的服务发现框架，本身是一个基于REST的服务，主要用于定位运行在AWS域中的中间层服务，以达到负载均衡和中间层服务故障转移的目的。SpringCloud将它集成在其子项目spring-cloud-netflix中，以实现SpringCloud的服务发现功能。

本文章详细介绍如何搭建一个eureka-server工程

步骤一：安装jdk1.8（相信有工作经验的都会，不详细说明了）

步骤二：创建一个maven工程eureka-server，settings使用阿里maven仓库

settings.xml内容如下：

<?xml version="1.0" encoding="UTF-8"?>

<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0"
          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0 http://maven.apache.org/xsd/settings-1.0.0.xsd">
  <localRepository>D:\repository-eureka</localRepository>
 
  <pluginGroups>
  </pluginGroups>

  <proxies>
  </proxies>

  <servers>
  
  </servers>
  <mirrors>

    <mirror>        
	  <id>nexus-aliyun</id>      
	  <name>nexus-aliyun</name>    
      <url>https://maven.aliyun.com/repository/public</url>
	  <mirrorOf>central</mirrorOf>        
	</mirror>

  </mirrors>

  <profiles>

  </profiles>

</settings>

步骤三：修改pom文件，内容如下

<?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">
   
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.csii</groupId>
   <artifactId>eureka-server</artifactId>
   <version>2.0.0-SNAPSHOT</version>
   <packaging>jar</packaging>
   <name>eureka-server</name>
   <description>eureka-server</description>

   <parent>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-parent</artifactId>
      <version>1.5.22.RELEASE</version>
      <relativePath/>
   </parent>

   <properties>
      <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
      <java.version>1.8</java.version>
      <!-- 对应springboot1.5.x -->
      <spring-cloud.version>Edgware.RELEASE</spring-cloud.version>
      
	  <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
	  <package.output.file.name>eureka-server</package.output.file.name>
	  <package.output.dir>${project.build.directory}/${package.output.file.name}</package.output.dir>	
   </properties>

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

      <dependency>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-test</artifactId>
         <scope>test</scope>
      </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>
		<resources>
			<resource>
				<directory>sh</directory>
				<targetPath>${package.output.dir}</targetPath>
			</resource>
			<resource>
				<directory>src/main/resources</directory>
			</resource>
		</resources>		
		<plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
			    <configuration>  
			        <outputDirectory>${package.output.dir}</outputDirectory>  
			    </configuration>                  
                <executions>
                    <execution>
                        <goals>
                            <goal>repackage</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
			
			<!-- 打指定的包类型 -->
			<plugin>
			    <groupId>org.apache.maven.plugins</groupId>
				<artifactId>maven-assembly-plugin</artifactId>
				<executions>  <!--执行器 mvn assembly:assembly -->
					<execution>
						<id>make-zip</id><!--名字任意 -->
 						<phase>package</phase><!-- 绑定到package生命周期阶段上 -->
 						<goals>
							<goal>single</goal><!-- 只运行一次 -->
						</goals>
						<configuration>
						    <finalName>${package.output.file.name}</finalName>
							<descriptors> <!--描述文件路径 -->
								<descriptor>./assembly.xml</descriptor>
							</descriptors>
						</configuration>
					</execution>
				</executions>
			</plugin>						
		</plugins>
	</build>
   
</project>

步骤四：创建启动类EurekaServerApp.java

package com.csii;

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

@SpringBootApplication
@EnableEurekaServer
public class EurekaServerApp {
  public static void main(String[] args) {
    SpringApplication.run(EurekaServerApp.class, args);
    System.out.println("Application eureka server start success");
  }
}

步骤五：配置application.yml

#本地运行默认使用此文件配置
spring:
  application:
    name: eureka-server

server:
  port: 8761

eureka:
  instance: 
    hostname: localhost
    lease-renewal-interval-in-seconds: 30
    lease-expiration-duration-in-seconds: 30
  server:
    enable-self-preservation: false #设为false，关闭自我保护
    eviction-interval-timer-in-ms: 60000 #清理间隔（单位毫秒，默认是60*1000）
  client:
    registerWithEureka: false  #是否将自己注册到Eureka Server 默认true
    fetchRegistry: false #是否从Eureka Server获取注册的服务信息 fale表示自己就是注册中心，我的职责就是维护服务实例，并不需要去检索服务
    serviceUrl:
      defaultZone: http://localhost:8761/eureka/

步骤六：运行启动类EurekaServerApp.java

出现下图内容说明启动成功