5

按照spring 指南构建了 eureka 服务器、spring 云网关和一个示例 rest 服务。

但是,网关无法使用来自 eureka 服务器的服务名称检索 url。网关和服务的注册似乎没问题。当提供实际端点而不是服务 ID 时,它可以正常工作。我无法理解为什么网关没有从尤里卡解析服务 ID。我是否缺少任何配置?

错误信息:

2018-09-05 23:20:17.751  INFO 47037 --- [ctor-http-nio-2] c.netflix.loadbalancer.BaseLoadBalancer  : Client: localhost instantiated a LoadBalancer: DynamicServerListLoadBalancer:{NFLoadBalancer:name=localhost,current list of Servers=[],Load balancer stats=Zone stats: {},Server stats: []}ServerList:null
2018-09-05 23:20:17.756  INFO 47037 --- [ctor-http-nio-2] c.n.l.DynamicServerListLoadBalancer      : Using serverListUpdater PollingServerListUpdater
2018-09-05 23:20:17.760  INFO 47037 --- [ctor-http-nio-2] c.n.l.DynamicServerListLoadBalancer      : DynamicServerListLoadBalancer for client localhost initialized: DynamicServerListLoadBalancer:{NFLoadBalancer:name=localhost,current list of Servers=[],Load balancer stats=Zone stats: {},Server stats: []}ServerList:org.springframework.cloud.netflix.ribbon.eureka.DomainExtractingServerList@107dc063
2018-09-05 23:20:17.822 ERROR 47037 --- [ctor-http-nio-2] .a.w.r.e.DefaultErrorWebExceptionHandler : Failed to handle request [GET http://localhost:8080/rest-service/hello]

org.springframework.cloud.gateway.support.NotFoundException: Unable to find instance for localhost
    at org.springframework.cloud.gateway.filter.LoadBalancerClientFilter.filter(LoadBalancerClientFilter.java:72) ~[spring-cloud-gateway-core-2.0.1.RELEASE.jar:2.0.1.RELEASE]
    at org.springframework.cloud.gateway.handler.FilteringWebHandler$GatewayFilterAdapter.filter(FilteringWebHandler.java:133) ~[spring-cloud-gateway-core-2.0.1.RELEASE.jar:2.0.1.RELEASE]
    at org.springframework.cloud.gateway.filter.OrderedGatewayFilter.filter(OrderedGatewayFilter.java:44) ~[spring-cloud-gateway-core-2.0.1.RELEASE.jar:2.0.1.RELEASE]
    at org.springframework.cloud.gateway.handler.FilteringWebHandler$DefaultGatewayFilterChain.lambda$filter$0(FilteringWebHandler.java:115) ~[spring-cloud-gateway-core-2.0.1.RELEASE.jar:2.0.1.RELEASE]
    at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:45) ~[reactor-core-3.1.8.RELEASE.jar:3.1.8.RELEASE]

服务注册:在此处输入图像描述

附上代码的链接:

4

3 回答 3

7

问题在于 Spring Cloud Gateway 从 eureka 访问服务名称的方式,它区分大小写。解决方法是在 application.yml 中添加以下属性

spring.cloud.gateway.discovery.locator.lower-case-service-id= true
spring.cloud.gateway.discovery.locator.enabled= true

我已经创建了一个示例项目来展示他们一起工作

于 2019-06-12T01:57:12.530 回答
0

除了接受的答案之外,请确保添加 DiscoveryClient 依赖项:

10.2 DiscoveryClient 路由定义定位器

网关可以配置为基于在与 DiscoveryClient 兼容的服务注册表中注册的服务创建路由。

要启用此功能,请设置 spring.cloud.gateway.discovery.locator.enabled=true 并确保 DiscoveryClient 实现位于类路径上并已启用(例如 Netflix Eureka、Consul 或 Zookeeper)。

参见10.2 DiscoveryClient 路由定义定位器

于 2020-04-09T14:09:09.350 回答
0

如果您使用WebClient从 spring cloud gateway-service 对其他微服务进行 API 调用,请确保WebClient.Builder在配置类中进行注释。

@Configuration
@EnableConfigurationProperties
@ConfigurationProperties
@Component
public class ContentConfig {

    @Bean
    @LoadBalanced
    public WebClient.Builder loadBalancedWebClientBuilder() {
        return WebClient.builder();
    }
}

然后在您的提供者或服务类@AutoWired中通过 WebClient bean,

@Autowired
public WebClient.Builder webClientBuilder;

于 2021-02-01T13:51:04.310 回答