Spring Cloud：Zuul抛出“负载均衡器没有客户端可用的服务器”

Question

我试图获得一个简单的微服务注册到尤里卡服务器，然后有Zuul代理到微服务。我得到了微服务注册到尤里卡服务器。然而，每当我打开Zuul服务时，我看到它没有注册到Eureka服务器。每当我试图路由到微服务时，我会得到以下异常：

负载均衡器没有可用于客户端的服务器：微服务

微服务组件

microserviceapplication.java

@SpringBootApplication(scanBasePackages = { "some.package.controller", "some.package.service" })
@EnableEurekaClient
@EnableJpaRepositories("some.package.repository")
@EntityScan("some.package.entity")
public class MicroserviceApplication {

    public static void main(String[] args) {
        SpringApplication.run(MicroserviceApplication.class, args);
    }

}

bootstrap.yml

server:
  port: 8090

info:
  component: Core Services

spring:
  application:
    name: microservice

eureka:
  instance:
    leaseRenewalIntervalInSeconds: 1
    leaseExpirationDurationInSeconds: 2
  client:
    serviceUrl:
      defaultZone: http://localhost:8761/eureka/
    healthcheck:
      enabled: true
    lease:
      duration: 5

#some other logging and jpa properties below

eureKaserverApplication.java

@SpringBootApplication
@EnableEurekaServer
public class EurekaServerApplication {

    public static void main(String[] args) {
        SpringApplication.run(EurekaServerApplication.class, args);
    }

}

bootstrap.yml

spring:
  application:
    name: discovery-server

application.yml

server:
  port: 8761

info:
  component: Discovery Server

eureka:
  client:
    registerWithEureka: false
    fetchRegistry: false
    serviceUrl:
      defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/
  instance:
    hostname: localhost
  server:
    waitTimeInMsWhenSyncEmpty: 0

@SpringBootApplication
@EnableZuulProxy
public class ZuulGatewayApplication {
    public static void main(String[] args) {
        SpringApplication.run(ZuulGatewayApplication.class, args);
    }

    @Bean
    public ZuulGatewayPreFilter gatewayPreFilter() {
        return new ZuulGatewayPreFilter();
    }
}

spring:
  application:
    name: api-gateway

server:
  port: 8888

info:
  component: API Gateway

eureka:
  instance:
    leaseRenewalIntervalInSeconds: 1
    leaseExpirationDurationInSeconds: 2
  client:
    serviceUrl:
      defaultZone: http://localhost:8761/eureka/

zuul:
  routes:
    microservice: 
      path: /microservice/**
      serviceId: microservice

Answer 1

添加@enableeurekaclient解决了这个问题。Zuul应用程序现在可以在Eureka服务器中发现，并且能够路由请求。