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当我尝试执行以下使用功能区并尝试从 eureka 获取服务器列表的代码时，出现以下异常。

例外

3122 [main] WARN com.netflix.loadbalancer.RoundRobinRule - No up servers available from load balancer: DynamicServerListLoadBalancer:{NFLoadBalancer:name=origin,current list of Servers=[],Load balancer stats=Zone stats: {},Server stats: []}ServerList:DiscoveryEnabledNIWSServerList:; clientName:origin; Effective vipAddresses:localhost; isSecure:false; datacenter:null
Exception in thread "main" com.netflix.client.ClientException: LoadBalancer returned null Server for :origin
    at com.netflix.client.LoadBalancerContext.computeFinalUriWithLoadBalancer(LoadBalancerContext.java:418)
    at com.netflix.client.AbstractLoadBalancerAwareClient.executeWithLoadBalancer(AbstractLoadBalancerAwareClient.java:166)
    at com.netflix.zuul.RibbonTest.main(RibbonTest.java:23)

代码

public static void main(String[] args) throws Exception {
    ConfigurationManager.loadPropertiesFromResources("ribbon-client.properties");
    RestClient client = (RestClient) ClientFactory.getNamedClient("origin");          
    HttpRequest request = HttpRequest.newBuilder().uri(new URI("/serviceContext/api/v1/")).build(); 
    for (int i = 0; i < 20; i++)  {
        HttpResponse response = client.executeWithLoadBalancer(request); 
    }
}

功能区-client.properties

origin.ribbon.NIWSServerListClassName=com.netflix.niws.loadbalancer.DiscoveryEnabledNIWSServerList
#also tried unsuccessfully with localhost:8091, localhost:8091/serviceContext
origin.ribbon.DeploymentContextBasedVipAddresses=localhost

该服务是一个 Spring-Boot（不使用 Spring-Cloud）应用程序，使用eureka-client.properties：

eureka-client.properties

eureka.registration.enabled=true
eureka.preferSameZone=true
eureka.shouldUseDns=false
eureka.serviceUrl.default=http://localhost:9080/eureka/v2/
eureka.region=default
eureka.name=service-Eureka
eureka.vipAddress=localhost
eureka.port=8091
eureka.instanceId=CHNSHL119363L

该服务已成功注册到部署在本地 tomcat@port 9080 中的 eureka，并且可以发现@http://localhost:9080/eureka/ and http://localhost:9080/eureka/v2/apps/

W/O 使用 Spring-Cloud 需要在上面的代码/配置中修复什么才能使用功能区从 eureka 动态获取服务器列表？

4

1 回答 1

0

以下帖子很有用。该问题通过以下方式解决：
1. 更正服务和功能区的 vipAddress 配置
2. 将功能区配置和注册为 eureka-client

1.vipAddress的变化

eureka-client.properties（服务）

eureka.vipAddress=my.eureka.local

功能区-client.properties

origin.ribbon.DeploymentContextBasedVipAddresses=my.eureka.local

2. 将ribbon注册为eureka-client的变化

public static void main(String[] args) throws Exception {
    ConfigurationManager.loadPropertiesFromResources("ribbon-client.properties");

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

    RestClient client = (RestClient) ClientFactory.getNamedClient("origin");          
    HttpRequest request = HttpRequest.newBuilder().uri(new URI("/serviceContext/api/v1/")).build(); 
    for (int i = 0; i < 20; i++)  {
                HttpResponse response = client.executeWithLoadBalancer(request); 
    }
}
于 2017-01-27T06:59:33.153 回答