Question

我有以下简单设置。 Spring Cloud Eureka Server-和两个服务PricingService和DiscountService。 定价服务呼叫-> DiscountService 。

服务器设置

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

属性

spring.application.name=eureka-server
server.port=8761
eureka.client.registerWithEureka=false
eureka.client.fetchRegistry=false
eureka.client.serviceUrl.defaultZone=http://localhost:8761/eureka/

DiscountService

@SpringBootApplication
@EnableDiscoveryClient
@Slf4j
public class DiscountServiceApplication {

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

}
@RestController
@RequestMapping("/discount/{product}")
@Slf4j
public class DiscountController{

    @GetMapping
    public int getDiscountPercentage(@PathVariable("product") String product){
        log.info("Getting Discount for Product {}",product);
        return  50;
    }

}

spring.application.name=discount-service 
eureka.client.serviceUrl.defaultZone= http://localhost:8761/eureka/
server.port=8081

定价服务

@SpringBootApplication
@EnableDiscoveryClient
@EnableFeignClients
public class PricingServiceApplication {

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


}
@RestController
@Slf4j
class ServiceInstanceRestController {

    @Autowired
    private DiscountServiceClient discountServiceClient;

    @GetMapping("/test/")
    public String getPriceForProduct() {
        log.info("getPriceForProduct");
      int dscount = discountServiceClient.getDiscountPercentage("Test");
        log.info("Discount is {}",dscount);
        return "Price";
    }
}

@FeignClient("discount-service")
interface DiscountServiceClient {
    @RequestMapping(method = RequestMethod.GET, value = "/discount/{product}")
    int getDiscountPercentage(@PathVariable("product") String product);
}

spring.application.name=pricing-service 
eureka.client.serviceUrl.defaultZone= http://localhost:8761/eureka/
server.port=8080
eureka.client.fetchRegistry=true

致电折扣服务时，我遇到了异常情况

com.netflix.client.ClientException: Load balancer does not have available server for client: discount-service
    at com.netflix.loadbalancer.LoadBalancerContext.getServerFromLoadBalancer(LoadBalancerContext.java:483) ~[ribbon-loadbalancer-2.3.0.jar:2.3.0]

我正在使用 Spring Boot 2.1.4.RELEASE

spring-cloud-starter-netflix-eureka-client
spring-cloud-starter-openfeign
spring-cloud-starter-netflix-eureka-server-server (Fo Server)

我已经检查了Load balancer does not have available server for client的答案但是对我没用...

我在这里想念什么？

Answer 1

这还需要依赖执行器

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-actuator</artifactId>
</dependency>

有关更多详细信息，请参阅以下链接

Spring Cloud Eureka + FeignClient + Ribbon：负载均衡器没有适用于客户端的服务器

1 个答案: