spring cloud 创建一个简单Eureka Server

在Spring Cloud实现一个Eureka Server是一件非常简单的事情。下面我们来写一个Eureka Server DEMO。

编码

父项目pom.xml

<?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>
    <!-- 父项目骨架 -->
    <groupId>com.pupeiyuan.springcloud</groupId>
    <artifactId>spring-Cloud</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>pom</packaging>
    <!-- 包含的子项目 -->
    <modules>
        <module>springcloud-eureka</module>
    </modules>
    <!-- java版本信息 -->
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
    </properties>
    <!-- springboot以来的父项目 -->
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.4.2.RELEASE</version>
    </parent>

    <dependencyManagement>
        <dependencies>
            <!-- springcloud版本依赖 -->
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Camden.SR3</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

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

maven子项目 springcloud-eureka  pom.xml

<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>
    <!-- 父项目yilai -->
    <parent>
        <groupId>com.pupeiyuan.springcloud</groupId>
        <artifactId>spring-Cloud</artifactId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>
    <artifactId>springcloud-eureka</artifactId>
    <packaging>jar</packaging>
    <dependencies>
        <!-- eureka server 依赖 -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-eureka-server</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-security</artifactId>
        </dependency>
    </dependencies>
</project>

(2) 编写启动类，在启动类上添加@EnableEurekaServer 注解。

package com.spring.pupeiyuan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;

@SpringBootApplication
@EnableEurekaServer
public class EurekaServerApplication {

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

(3) 编写配置文件application.properties

server.port=8761

eureka.instance.hostname=localhost
eureka.instance.prefer-ip-address=true
eureka.client.serviceUrl.defaultZone=http://${eureka.instance.hostname}:${server.port}/eureka/
eureka.client.registerWithEureka=false
eureka.client.fetchRegistry=false
eureka.environment=eureka-test
eureka.datacenter=eureka-data
eureka.server.enable-self-preservation=false
eureka.server.eviction-interval-timer-in-ms=4000

security.basic.enabled=true
security.user.name=root
security.user.password=123456

这样就完成了一个简单的Eureka Server。

测试

启动工程后，访问：http://localhost:8761/ 。我们会发现此时还没有服务注册到Eureka上面，如下图：

该页面展示了Eureka的系统状态、当前注册到Eureka Server上的服务实例、一般信息、实例信息等。我们可以看到，当前还没有任何服务被注册到Eureka Server上。