在Spring Cloud Eureka配置集群中，我们介绍了Eureka集群部署的方式，这篇文章，我们继续编写服务的提供者及服务的消费者。

服务提供者

我们创建microservice-simple-provider-user工程，作为服务的提供者。

添加依赖

 <dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>

添加配置文件

spring:
  application:
    name: microservice-provider-user
eureka:
  client:
    service-url:
      default-zone: http://peer1:8761/eureka,http://peer2:8762/eureka
  instance:
    prefer-ip-address: true
    metadata-map:
      my-metadata: 自定义元数据

创建用户实体User.java

@Data
public class User {

    private Long id;

    private String userName;

    private String name;

    private Integer age;

    private BigDecimal balance;

}

创建服务提供者

@RestController
public class UserController {

    @GetMapping("{id}")
    public User findById(@PathVariable Long id){
        User user = new User();
        user.setId(id);
        user.setName("zhangsan");
        user.setName("张三");
        user.setAge(31);
        user.setBalance(new BigDecimal(300));
        return user;
    }

}

服务消费者

我们创建microservice-consumer-movie工程，作为服务的消费者。

添加依赖

添加依赖

 <dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>

添加配置文件

spring:
  application:
    name: microservice-provider-user
eureka:
  client:
    service-url:
      default-zone: http://peer1:8761/eureka,http://peer2:8762/eureka
  instance:
    prefer-ip-address: true
    metadata-map:
      my-metadata: 自定义元数据

我们通过metadata-map可以自定义元数据。

测试获取服务提供者信息

import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.annotation.Resource;
import java.util.List;

/**
 * 博客：https://www.xiangcaowuyu.net
 * Description:
 *
 * @Author: 香草物语
 * DateTime: 2021-07-17 22:11
 */
@RestController
public class MovieController {

    @Resource
    private DiscoveryClient discoveryClient;

    @GetMapping("/user-instance")
    public List<ServiceInstance> showInfo(){
        return discoveryClient.getInstances("microservice-provider-user");
    }

}

我们访问http://localhost:8081/user-instance，可以获取到服务提供者的详细信息

[{
    "scheme": "http",
    "host": "192.168.3.48",
    "port": 8080,
    "metadata": {
        "management.port": "8080",
        "my-metadata": "自定义元数据"
    },
    "secure": false,
    "uri": "http://192.168.3.48:8080",
    "serviceId": "MICROSERVICE-PROVIDER-USER",
    "instanceId": "DESKTOP-PPDVS3E:microservice-provider-user",
    "instanceInfo": {
        "instanceId": "DESKTOP-PPDVS3E:microservice-provider-user",
        "app": "MICROSERVICE-PROVIDER-USER",
        "appGroupName": null,
        "ipAddr": "192.168.3.48",
        "sid": "na",
        "homePageUrl": "http://192.168.3.48:8080/",
        "statusPageUrl": "http://192.168.3.48:8080/actuator/info",
        "healthCheckUrl": "http://192.168.3.48:8080/actuator/health",
        "secureHealthCheckUrl": null,
        "vipAddress": "microservice-provider-user",
        "secureVipAddress": "microservice-provider-user",
        "countryId": 1,
        "dataCenterInfo": {
            "@class": "com.netflix.appinfo.InstanceInfo$DefaultDataCenterInfo",
            "name": "MyOwn"
        },
        "hostName": "192.168.3.48",
        "status": "UP",
        "overriddenStatus": "UNKNOWN",
        "leaseInfo": {
            "renewalIntervalInSecs": 30,
            "durationInSecs": 90,
            "registrationTimestamp": 1626531693579,
            "lastRenewalTimestamp": 1626531693579,
            "evictionTimestamp": 0,
            "serviceUpTimestamp": 1626531693579
        },
        "isCoordinatingDiscoveryServer": false,
        "metadata": {
            "management.port": "8080",
            "my-metadata": "自定义元数据"
        },
        "lastUpdatedTimestamp": 1626531693579,
        "lastDirtyTimestamp": 1626531693019,
        "actionType": "ADDED",
        "asgName": null
    }
}]