Spring Cloud Kubernetes FeignClient Error

Question

I am using spring cloud kubernetes with spring boot and necessary RBAC requirements needed for the project.

<!-- kubernetes -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-kubernetes</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-kubernetes-config</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-kubernetes-ribbon</artifactId>
        </dependency>

I have 2 microservices running in kubernetes

my-service
some-service

The my-service is running with spring boot 2.x and some-service is running with Spring boot 1.x. Both the services are exposed via the Kubernetes Service and with proper endpoints.

excerpt of application.yaml for my-service is as below.

some-service:
      url: http://some-service:8080
      serviceName: some-service

And the FeignClient used is as below.

//FeignClient(url = "${some-service.url}") // does not work either
@FeignClient(value = "${some-service.serviceName}")
@RequestMapping("/api")
public interface SomeServiceClient {

Also I have made spring.cloud.kubernetes.discovery.enabled=false

With this in place I expect that my-service should be able to talk to some-service via kubernetes service discovery But I get this error.

ERROR c.b.d.m.s.c.MatchCoordinator - error=FeignException: status 404 reading SomeServiceClient#get(Test
ion,Output) stacktrace=feign.FeignException: status 404 reading SomeServiceClient#get

I am unable to understand what am I doing wrong. Also I do not have the spring.application.name set for some-service since its a third party service.

Can someone please help. Also FYI that the services work properly with port-forwarding and if accessed via Ingress.

Hi, could you please help me with this one https://stackoverflow.com/questions/58789632/feign-client-not-able-to-make-calls-kubernetes Having similar problem — Chandresh Mishra, Nov 10 '19 at 16:12
My issue was the JWT propagation not working with spring-cloud-starter-kubernetes — Chandresh Mishra, Jan 09 '20 at 19:57

score 1 · Answer 1 · answered Mar 08 '19 at 20:23

1

If you do not have a name set for some-service, and it's a 3rd party service, I think the better approach would be to call it via RestTemplate or something.

Feign client needs to have the service name configured and known, for it to call that particular service in the network using service discovery.

answered Mar 08 '19 at 20:23

Muhammad Inshal

62
5

this may be another approach , However my current approached worked well. ! Thank you! – chaosguru Mar 12 '19 at 15:44

score 1 · Accepted Answer · answered Mar 12 '19 at 15:43

Well, I found that the discrepancy was at the some-service where the payload of was updated and my-service FeignClient was not updated. and hence caused the HTTP 404 Error. However it works now with the FeignClient properly and able to do a service discovery with the service name properly.

Spring Cloud Kubernetes FeignClient Error

2 Answers2