Spring Cloud入门教程（一）：Eureka服务注册中心

客官°小女子只卖身不卖艺 2024-04-19 16:29 85阅读 0赞

导语：Spring Cloud是一系列框架的有序集合。它利用Spring Boot的开发便利性巧妙地简化了分布式系统基础设施的开发，如服务发现注册、配置中心、消息总线、负载均衡、断路器、数据监控等，都可以用Spring Boot的开发风格做到一键启动和部署。Spring Cloud并没有重复制造轮子，它只是将目前各家公司开发的比较成熟、经得起实际考验的服务框架组合起来，通过Spring Boot风格进行再封装屏蔽掉了复杂的配置和实现原理，最终给开发者留出了一套简单易懂、易部署和易维护的分布式系统开发工具包！

第一步：创建服务注册中心

1.  使用IDEA创建一个主maven工程，主maven工程（父工程）只需要保留pom文件即可，其中src等不需要目录可以删除掉！
2.  在父工程中创建一个Moudle，作为服务注册中心，即Eureka Server
    
    **右键工程->创建model-> 选择spring initialir ：**
    
    ![format_png][]
3.  ![format_png 1][]![format_png 2][]
    
    **下一步->选择cloud discovery->eureka server** 
    
    **继续下一步后即可**
    
    ![format_png 3][]
4.  创建完成主要检查pom文件的依赖项
    
        <?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">    <modelVersion>4.0.0</modelVersion>    <parent>        <groupId>org.springframework.boot</groupId>        <artifactId>spring-boot-starter-parent</artifactId>        <version>2.1.8.RELEASE</version>        <relativePath/>     </parent>    <groupId>com.shitou.cloud</groupId>    <artifactId>dsc-eureka</artifactId>    <version>0.0.1-SNAPSHOT</version>    <name>dsc-eureka</name>    <description>Demo project for Spring Boot</description>
            <properties>        <java.version>1.8</java.version>        <spring-cloud.version>Greenwich.SR3</spring-cloud.version>    </properties>
            <dependencies>        <dependency>            <groupId>org.springframework.cloud</groupId>            <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>            <version>2.1.2.RELEASE</version>        </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>        <plugins>            <plugin>                <groupId>org.springframework.boot</groupId>                <artifactId>spring-boot-maven-plugin</artifactId>            </plugin>        </plugins>    </build>
        </project>
5.  在启动类中加入注解@EnableEurekaServer 开启注册中心
    
        @SpringBootApplication@EnableEurekaServerpublic class DscEurekaApplication {
             
            public static void main(String[] args) {
                     SpringApplication.run(DscEurekaApplication.class, args);    }}
6.  配置文件，指定注册服务中心地址及端口
    
        server:  port: 8761  #服务端口
        eureka:  instance:   hostname: localhost  #注册中心地址Url 目前我们可以指定本机  client:   registerWithEureka: false   fetchRegistry: false   # eureka.client.registerWithEureka：false和fetchRegistry：false来表明自己是一个eureka server.   serviceUrl:    defaultZone: http://${eureka.instance.hostname}:${server.port}    /eureka/    
7.  注册中心内置了界面，我们可以通过配置文件的地址进行访问：如上配置指定的注册中心地址为：localhost：8761

![format_png 4][]

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下篇预告：服务发现：Eureka客户端

![format_png 5][]

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