spring-cloud入门（一）：eureka-server（服务发现）

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前言

Eureka是一个服务发现和注册框架，细的来说，我们可以分为eureka-server（服务发现）和eureka-client（服务注册）两个，本次我们对eureka-server（服务发现）做一个项目搭建，作为spring-cloud的开篇。

开源地址：https://github.com/bigbeef
个人博客：http://blog.cppba.com

项目结构


maven结构大家应该都清楚（不清楚的需要补一补，百度关于maven的文章不计其数），下面我们来看一看这些关键文件的配置

代码编写

cppba-spring-cloud > pom.xml

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<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.cppba</groupId>
    <artifactId>cppba-spring-cloud</artifactId>
    <version>1.0.0</version>
    <packaging>pom</packaging>
    <name>${project.artifactId}</name>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.5.RELEASE</version>
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <java.version>1.8</java.version>
        <spring-cloud.version>Dalston.SR2</spring-cloud.version>
    </properties>

    <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>

    <modules>
        <module>cppba-spring-cloud-eureka-server</module>
    </modules>

</project>

cppba-spring-cloud-eureka-server > pom.xml

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<?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>
	<artifactId>cppba-spring-cloud-eureka-server</artifactId>
	<packaging>jar</packaging>
	<name>${project.artifactId}</name>

	<parent>
		<groupId>com.cppba</groupId>
		<artifactId>cppba-spring-cloud</artifactId>
		<version>1.0.0</version>
	</parent>

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

        <build>
		<finalName>${project.name}</finalName>
		<plugins>
			<!--打包可执行的jar-->
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
		</plugins>
	  </build>
</project>

SpringCloudEurekaServerApplication.java

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package com.cppba;

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

@EnableEurekaServer
@SpringBootApplication
public class SpringCloudEurekaServerApplication {

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

application.properties

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server.port=8761

eureka.instance.hostname=eureka-server
eureka.client.registerWithEureka=false
eureka.client.fetchRegistry=false
eureka.client.serviceUrl.defaultZone=http://${eureka.instance.hostname}:${server.port}/eureka/

到此项目搭建完成

启动项目

我们启动SpringCloudEurekaServerApplication中的main方法，访问http://127.0.0.1:8761

到此，eureka-server（服务发现）项目搭建成功