Implementing Service Discovery

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

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

server.port: 8761
eureka:
  client:
    register-with-eureka: false
    fetch-registry: false
  server:
    enable-self-preservation: false

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

spring.application.name: orders
eureka:
  client:
    service-url:
      defaultZone: http://eureka:8761/eureka/
  instance:
    prefer-ip-address: true
    instance-id: ${spring.application.name}:${random.uuid}

@Bean @LoadBalanced
RestClient.Builder loadBalancedRestClient() { return RestClient.builder(); }
// Use logical service name as host
String resp = restClient.get().uri("http://orders/api/orders/1").retrieve().body(String.class);

eureka:
  client:
    healthcheck.enabled: true
  instance:
    health-check-url-path: /actuator/health
    status-page-url-path:  /actuator/info
management:
  endpoint.health.probes.enabled: true

<dependency>
  <groupId>org.springframework.cloud</groupId>
  <artifactId>spring-cloud-starter-consul-discovery</artifactId>
</dependency>

spring:
  cloud:
    consul:
      host: consul
      port: 8500
      discovery:
        instance-id: ${spring.application.name}:${random.uuid}
        health-check-path: /actuator/health
        health-check-interval: 10s

@FeignClient(name = "orders") // resolves via discovery + LoadBalancer
public interface OrdersApi {
  @GetMapping("/api/orders/{id}") OrderDto get(@PathVariable Long id);
}