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我有一个 Spring Boot 应用程序试图通过 Eureka/Ribbon 获取服务实例：

@LoadBalanced
@Autowired
RestTemplate restTemplate;

@RequestMapping("/hi")
public String hi(@RequestParam(value="name", defaultValue="superuser") String name) {
    AccountRest account = this.restTemplate.getForObject("http://AUTHENTICATION-SERVICE/authservice/v1/accounts/userId/"+name,
        AccountRest.class);
return "hi, " + account.getId(); 
}

我是手动注册“AUTHENTICATION-SERVICE”，注意这个服务只需要注册自己，不需要查询eureka：

public class ServiceDiscoveryManager {

    private ApplicationInfoManager applicationInfoManager;
    private EurekaClient eurekaClient;

    public void start() {
        MyDataCenterInstanceConfig instanceConfig = new MyDataCenterInstanceConfig();
        DefaultEurekaClientConfig clientConfig = new DefaultEurekaClientConfig();

        InstanceInfo instanceInfo = new EurekaConfigBasedInstanceInfoProvider(instanceConfig).get();
        applicationInfoManager = new ApplicationInfoManager(instanceConfig, instanceInfo);
        eurekaClient = new DiscoveryClient(applicationInfoManager, clientConfig);

        applicationInfoManager.getInfo();
        eurekaClient.getApplications();

        instanceInfo.setStatus(InstanceStatus.UP);
    }

    public void stop() {
        eurekaClient.shutdown();
    }

}

ServiceDiscoveryManager 的 Spring 接线：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop"
    xmlns:tx="http://www.springframework.org/schema/tx"
    xsi:schemaLocation="
       http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
       http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
       http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd">

    <bean id="serviceDiscoveryManager" class="com.embotics.authervice.serviceDiscovery.ServiceDiscoveryManager" init-method="start"/>

</beans>

身份验证服务 eureka-client.properties 文件：

eureka.name=AUTHENTICATION-SERVICE
eureka.appGroup=AUTHENTICATION-SERVICE
eureka.vipAddress=http://localhost:9080
eureka.port.enabled=true
eureka.port=9080
eureka.traffic.enabled=true
eureka.preferSameZone=true
eureka.serviceUrl.default=http://localhost:8000/eureka/
eureka.decoderName=JacksonJson
eureka.healthCheckUrl=http://localhost:9080/authservice/health
eureka.healthCheckPath=/authservice/health

Eureka Dashboard 显示我的身份验证服务已注册：

捕获

当我尝试使用负载均衡器获取身份验证服务的实例时，我收到以下异常：

java.lang.IllegalStateException: No instances available for AUTHENTICATION-SERVICE
    at org.springframework.cloud.netflix.ribbon.RibbonLoadBalancerClient.execute(RibbonLoadBalancerClient.java:90) ~[spring-cloud-netflix-core-1.2.5.RELEASE.jar:1.2.5.RELEASE]

我已经确认负载均衡器知道身份验证服务，但 DynamicServerListLoadBalancer 的 allServerList 属性为空。

我已经玩了几个小时了，想知道是否某些配置无效。谢谢你的帮助。

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