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YunaiV
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增加 Eureka 示例
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‎README.md

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## API 网关
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* [《芋道 Spring Cloud 服务网关 Spring Cloud Gateway 入门》](http://www.iocoder.cn/Spring-Cloud/Spring-Cloud-Gateway/?github) 对应 [labx-08](https://github.com/YunaiV/SpringBoot-Labs/tree/master/labx-08)
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* [《芋道 Spring Cloud Netflix 服务网关 Zuul 入门》](http://www.iocoder.cn/Spring-Cloud/Zuul/?github) 对应 对应 [labx-21](https://github.com/YunaiV/SpringBoot-Labs/tree/master/labx-21)
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* [《芋道 Spring Cloud Netflix 服务网关 Zuul 入门》](http://www.iocoder.cn/Spring-Cloud/Netflix-Zuul/?github) 对应 对应 [labx-21](https://github.com/YunaiV/SpringBoot-Labs/tree/master/labx-21)
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* [《性能测试 —— Spring Cloud Gateway、Zuul 基准测试》](http://www.iocoder.cn/Performance-Testing/SpringCloudGateway-Zuul-benchmark/?github) 对应 [lab-07](https://github.com/YunaiV/SpringBoot-Labs/tree/master/lab-07)
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> 如下非 Spring Cloud 网关，先放在这里...

‎labx-22/labx-22-scn-eureka-demo01-consumer/pom.xml

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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<parent>
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<artifactId>labx-22</artifactId>
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<groupId>cn.iocoder.springboot.labs</groupId>
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<version>1.0-SNAPSHOT</version>
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</parent>
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<modelVersion>4.0.0</modelVersion>
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<artifactId>labx-22-scn-eureka-demo01-consumer</artifactId>
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<properties>
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<spring.boot.version>2.2.4.RELEASE</spring.boot.version>
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<spring.cloud.version>Hoxton.SR1</spring.cloud.version>
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</properties>
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<!--
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引入 Spring Boot、Spring Cloud、Spring Cloud Alibaba 三者 BOM 文件，进行依赖版本的管理，防止不兼容。
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在 https://dwz.cn/mcLIfNKt 文章中，Spring Cloud Alibaba 开发团队推荐了三者的依赖关系
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-->
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<dependencyManagement>
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<dependencies>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-parent</artifactId>
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<version>${spring.boot.version}</version>
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<type>pom</type>
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<scope>import</scope>
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</dependency>
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<dependency>
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<groupId>org.springframework.cloud</groupId>
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<artifactId>spring-cloud-dependencies</artifactId>
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<version>${spring.cloud.version}</version>
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<type>pom</type>
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<scope>import</scope>
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</dependency>
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</dependencies>
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</dependencyManagement>
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<dependencies>
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<!-- 引入 SpringMVC 相关依赖，并实现对其的自动配置 -->
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-web</artifactId>
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</dependency>
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<!-- 引入 Spring Cloud Netflix Eureka Client 相关依赖，将 Eureka 作为注册中心的客户端，并实现对其的自动配置 -->
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<dependency>
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<groupId>org.springframework.cloud</groupId>
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<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
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</dependency>
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</dependencies>
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</project>

‎labx-22/labx-22-scn-eureka-demo01-consumer/src/main/java/cn/iocoder/springcloudalibaba/labx22/consumerdemo/DemoConsumerApplication.java

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package cn.iocoder.springcloudalibaba.labx22.consumerdemo;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.boot.SpringApplication;
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import org.springframework.boot.autoconfigure.SpringBootApplication;
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import org.springframework.cloud.client.ServiceInstance;
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import org.springframework.cloud.client.discovery.DiscoveryClient;
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import org.springframework.cloud.client.loadbalancer.LoadBalancerClient;
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import org.springframework.context.annotation.Bean;
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import org.springframework.context.annotation.Configuration;
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import org.springframework.web.bind.annotation.GetMapping;
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import org.springframework.web.bind.annotation.RestController;
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import org.springframework.web.client.RestTemplate;
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import java.util.List;
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@SpringBootApplication
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// @EnableDiscoveryClient
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public class DemoConsumerApplication {
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public static void main(String[] args) {
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SpringApplication.run(DemoConsumerApplication.class, args);
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}
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@Configuration
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public class RestTemplateConfiguration {
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@Bean
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public RestTemplate restTemplate() {
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return new RestTemplate();
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}
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}
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@RestController
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static class TestController {
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@Autowired
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private DiscoveryClient discoveryClient;
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@Autowired
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private RestTemplate restTemplate;
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@Autowired
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private LoadBalancerClient loadBalancerClient;
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@GetMapping("/hello")
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public String hello(String name) {
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// 获得服务 `demo-provider` 的一个实例
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ServiceInstance instance;
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if (true) {
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// 获取服务 `demo-provider` 对应的实例列表
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List<ServiceInstance> instances = discoveryClient.getInstances("demo-provider");
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// 选择第一个
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instance = instances.size() > 0 ? instances.get(0) : null;
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} else {
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instance = loadBalancerClient.choose("demo-provider");
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}
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// 发起调用
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if (instance == null) {
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throw new IllegalStateException("获取不到实例");
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}
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String targetUrl = instance.getUri() + "/echo?name=" + name;
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String response = restTemplate.getForObject(targetUrl, String.class);
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// 返回结果
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return "consumer:" + response;
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}
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}
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}

‎labx-22/labx-22-scn-eureka-demo01-consumer/src/main/resources/application.yaml

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spring:
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application:
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name: demo-consumer # Spring 应用名
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server:
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port: 28080 # 服务器端口。默认为 8080
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eureka:
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client:
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register-with-eureka: true
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fetch-registry: true
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service-url:
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defaultZone: http://127.0.0.1:8761/eureka/

‎labx-22/labx-22-scn-eureka-demo01-provider/pom.xml

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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<parent>
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<artifactId>labx-22</artifactId>
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<groupId>cn.iocoder.springboot.labs</groupId>
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<version>1.0-SNAPSHOT</version>
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</parent>
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<modelVersion>4.0.0</modelVersion>
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<artifactId>labx-22-scn-eureka-demo01-provider</artifactId>
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<properties>
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<spring.boot.version>2.2.4.RELEASE</spring.boot.version>
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<spring.cloud.version>Hoxton.SR1</spring.cloud.version>
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</properties>
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<!--
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引入 Spring Boot、Spring Cloud、Spring Cloud Alibaba 三者 BOM 文件，进行依赖版本的管理，防止不兼容。
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在 https://dwz.cn/mcLIfNKt 文章中，Spring Cloud Alibaba 开发团队推荐了三者的依赖关系
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-->
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<dependencyManagement>
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<dependencies>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-parent</artifactId>
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<version>${spring.boot.version}</version>
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<type>pom</type>
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<scope>import</scope>
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</dependency>
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<dependency>
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<groupId>org.springframework.cloud</groupId>
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<artifactId>spring-cloud-dependencies</artifactId>
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<version>${spring.cloud.version}</version>
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<type>pom</type>
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<scope>import</scope>
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</dependency>
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</dependencies>
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</dependencyManagement>
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<dependencies>
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<!-- 引入 SpringMVC 相关依赖，并实现对其的自动配置 -->
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-web</artifactId>
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</dependency>
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<!-- 引入 Spring Cloud Netflix Eureka Client 相关依赖，将 Eureka 作为注册中心的客户端，并实现对其的自动配置 -->
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<dependency>
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<groupId>org.springframework.cloud</groupId>
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<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
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</dependency>
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</dependencies>
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</project>

‎labx-22/labx-22-scn-eureka-demo01-provider/src/main/java/cn/iocoder/springcloudalibaba/labx22/providerdemo/DemoProviderApplication.java

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package cn.iocoder.springcloudalibaba.labx22.providerdemo;
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import org.springframework.boot.SpringApplication;
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import org.springframework.boot.autoconfigure.SpringBootApplication;
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import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
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import org.springframework.web.bind.annotation.GetMapping;
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import org.springframework.web.bind.annotation.RestController;
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@SpringBootApplication
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@EnableDiscoveryClient
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public class DemoProviderApplication {
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public static void main(String[] args) {
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SpringApplication.run(DemoProviderApplication.class, args);
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}
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@RestController
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static class TestController {
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@GetMapping("/echo")
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public String echo(String name) {
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return "provider:" + name;
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}
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}
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}

‎labx-22/labx-22-scn-eureka-demo01-provider/src/main/resources/application.yaml

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spring:
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application:
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name: demo-provider # Spring 应用名
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server:
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port: 18080 # 服务器端口。默认为 8080
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eureka:
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client:
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register-with-eureka: true
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fetch-registry: true
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service-url:
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defaultZone: http://127.0.0.1:8761/eureka/

‎labx-22/labx-22-scn-eureka-server-cluster/pom.xml

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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<parent>
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<artifactId>labx-22</artifactId>
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<groupId>cn.iocoder.springboot.labs</groupId>
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<version>1.0-SNAPSHOT</version>
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</parent>
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<modelVersion>4.0.0</modelVersion>
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<artifactId>labx-22-scn-eureka-server-cluster</artifactId>
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<!--
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引入 Spring Boot、Spring Cloud、Spring Cloud Alibaba 三者 BOM 文件，进行依赖版本的管理，防止不兼容。
16+
在 https://dwz.cn/mcLIfNKt 文章中，Spring Cloud Alibaba 开发团队推荐了三者的依赖关系
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-->
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<dependencyManagement>
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<dependencies>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-parent</artifactId>
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<version>${spring.boot.version}</version>
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<type>pom</type>
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<scope>import</scope>
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</dependency>
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<dependency>
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<groupId>org.springframework.cloud</groupId>
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<artifactId>spring-cloud-dependencies</artifactId>
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<version>${spring.cloud.version}</version>
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<type>pom</type>
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<scope>import</scope>
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</dependency>
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</dependencies>
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</dependencyManagement>
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<dependencies>
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<!-- 引入 Spring Cloud Netflix Eureka Server 相关依赖，将 Eureka 作为注册中心的服务器，并实现对其的自动配置 -->
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<dependency>
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<groupId>org.springframework.cloud</groupId>
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<artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
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</dependency>
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</dependencies>
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</project>

‎labx-22/labx-22-scn-eureka-server-standalone/pom.xml

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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<parent>
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<artifactId>labx-22</artifactId>
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<groupId>cn.iocoder.springboot.labs</groupId>
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<version>1.0-SNAPSHOT</version>
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</parent>
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<modelVersion>4.0.0</modelVersion>
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<artifactId>labx-22-scn-eureka-server-standalone</artifactId>
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<properties>
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<spring.boot.version>2.2.4.RELEASE</spring.boot.version>
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<spring.cloud.version>Hoxton.SR1</spring.cloud.version>
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</properties>
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<!--
20+
引入 Spring Boot、Spring Cloud、Spring Cloud Alibaba 三者 BOM 文件，进行依赖版本的管理，防止不兼容。
21+
在 https://dwz.cn/mcLIfNKt 文章中，Spring Cloud Alibaba 开发团队推荐了三者的依赖关系
22+
-->
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<dependencyManagement>
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<dependencies>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-parent</artifactId>
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<version>${spring.boot.version}</version>
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<type>pom</type>
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<scope>import</scope>
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</dependency>
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<dependency>
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<groupId>org.springframework.cloud</groupId>
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<artifactId>spring-cloud-dependencies</artifactId>
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<version>${spring.cloud.version}</version>
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<type>pom</type>
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<scope>import</scope>
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</dependency>
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</dependencies>
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</dependencyManagement>
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<dependencies>
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<!-- 引入 Spring Cloud Netflix Eureka Server 相关依赖，将 Eureka 作为注册中心的服务器，并实现对其的自动配置 -->
44+
<dependency>
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<groupId>org.springframework.cloud</groupId>
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<artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
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</dependency>
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</dependencies>
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</project>

‎labx-22/labx-22-scn-eureka-server-standalone/src/main/java/cn/iocoder/springcloudalibaba/labx22/eurekaserverdemo/EurekaServerNode01Application.java

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package cn.iocoder.springcloudalibaba.labx22.eurekaserverdemo;
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import org.springframework.boot.SpringApplication;
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import org.springframework.boot.autoconfigure.SpringBootApplication;
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import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;
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@SpringBootApplication
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@EnableEurekaServer
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public class EurekaServerNode01Application {
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public static void main(String[] args) {
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System.setProperty("spring.profiles.active", "node01");
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SpringApplication.run(EurekaServerNode01Application.class,args);
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}
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}

‎labx-22/labx-22-scn-eureka-server-standalone/src/main/java/cn/iocoder/springcloudalibaba/labx22/eurekaserverdemo/EurekaServerNode02Application.java

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package cn.iocoder.springcloudalibaba.labx22.eurekaserverdemo;
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import org.springframework.boot.SpringApplication;
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import org.springframework.boot.autoconfigure.SpringBootApplication;
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import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;
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@SpringBootApplication
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@EnableEurekaServer
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public class EurekaServerNode02Application {
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public static void main(String[] args) {
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System.setProperty("spring.profiles.active", "node02");
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SpringApplication.run(EurekaServerNode02Application.class,args);
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}
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}

‎labx-22/labx-22-scn-eureka-server-standalone/src/main/resources/application-node01.yaml

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server:
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port: 18761
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spring:
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application:
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name: eureka-server
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eureka:
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instance:
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hostname: eureka-node01
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client:
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register-with-eureka: true
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fetch-registry: true
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service-url:
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defaultZone: http://eureka-node02:28761/eureka/

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