Spring Cloud Ribbon throws exception called No instances available for serverurl

Question

I am using spring boot with spring could ribbon. I did all configuration of ribbon. But when I send a request to rest controller, it throws an exception called No instances available for serverurl. How can I fix this?

These are my configurations

application.yml

port: 8888

serverurl:
  ribbon:
    eureka:
      enabled: false
    listOfServers: localhost:8081,localhost:8082,localhost:8083
    ServerListRefreshInterval: 15000

Spring Boot Main Class

@SpringBootApplication
@RibbonClient(name = "serverurl", configuration = RibbonCongisuration.class)
public class Server {

    @LoadBalanced
    @Bean
    RestTemplate restTemplate(){
        return new RestTemplate();
    }


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

Rest Controller

@RestController
@RequestMapping(value = "api/v1/clients")
public class ClientController {



    @Autowired
    RestTemplate restTemplate;

    @GetMapping(value = "/{ID}")
    public ClientDTO findByID(@PathVariable("ID") String clientID){
       return  restTemplate.getForEntity("http://serverurl/api/v1/clients/"+clientID,ClientDTO.class).getBody();

    }
}

URL

http://localhost:8888/api/v1/clients/1234

Answer 1

1) Make sure http://localhost:8081/api/v1/clients/1234 (8081/8082/8083) response.

2) Add RibbonConfiguration file for example:

@Configuration
public class RibbonConfiguration{
@Bean
public IRule ribbonRule() {
    return new BestAvailableRule();
}

@Bean
public IPing ribbonPing() {
    return new PingUrl();
}

}

3) Make sure you have this kind of pom dependency (for example):

<dependency>
     <groupId>org.springframework.cloud</groupId>
     <artifactId>spring-cloud-starter-netflix-ribbon</artifactId>
</dependency>

And

<dependencyManagement>
 <dependencies>
     <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-dependencies</artifactId>
        <version>Finchley.SR2</version>
        <type>pom</type>
        <scope>import</scope>
     </dependency>
 </dependencies>