SpringCloud Study- (三) Register Provider In Eureka

目标：

开发两个服务器提供者模块，把服务提供者模块注册到Eureka 服务集群上。

步骤：

1.创建springboot modle 项目 SpringbootProvider1 ， SpringbootProvider2

2. 在pom文件中添加注册到Eureka 服务上的以来支持.

<?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>org.example</groupId>
    <artifactId>SpringbootProvider1</artifactId>
    <version>1.0-SNAPSHOT</version>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.5.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <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>Greenwich.SR1</spring-cloud.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <!-- 增加Eureka的支持
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
        </dependency>-->

        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</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>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

3.修改Application.properties 文件，加入eureka相关配置,defaultZone 是eureka对外提供服务的地址。为了在集群中被eureka识别为同一服务，设置的

SpringbootProvider1->Application.properties

server.port=8001
spring.application.name=provider
#每间隔2s向注册中心发心跳证明自己服务正常
eureka.instance.lease-renewal-interval-in-seconds=2
#在10s之内没有收到心跳请将本服务移除
eureka.instance.lease-expiration-duration-in-seconds=10
eureka.client.serviceUrl.defaultZone=http://eureka1:9001/eureka,http://eureka2:9002/eureka,http://eureka3:9003/eureka

#springboot的监控端点访问权限，*表示所有的访问端点都允许访问
management.endpoints.web.exposure.include=*

SpringbootProvider2->Application.properties

server.port=8002
spring.application.name=provider
#每间隔2s向注册中心发心跳证明自己服务正常
eureka.instance.lease-renewal-interval-in-seconds=2
#在10s之内没有收到心跳请将本服务移除
eureka.instance.lease-expiration-duration-in-seconds=10
eureka.client.serviceUrl.defaultZone=http://eureka1:9001/eureka,http://eureka2:9002/eureka,http://eureka3:9003/eureka

#springboot的监控端点访问权限，*表示所有的访问端点都允许访问
management.endpoints.web.exposure.include=*

4.在启动类上增加Eurekaclient 的注解

@EnableEurekaClient

5. 开发测试controller

@RestController
public class ProviderSay1 {
    @RequestMapping("/providerHello")
    public String providerHello(){

        return "provider1 hello";
    }

}

@RestController
public class ProviderSay2 {
    @RequestMapping("/providerHello")
    public String providerHello(){

        return "provider2 hello";
    }
}

6. 启动Eureka 集群服务，然后启动两个provider服务。在Application 中会发现服务提供者的名字。