Setting Up Eureka Server

The registry is just another Spring Boot app. Create discovery-server on Spring Initializr with the dependency Eureka Server:

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

package com.shopease.discovery;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;

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

server:
  port: 8761

spring:
  application:
    name: discovery-server

eureka:
  client:
    register-with-eureka: false   # I am the registry, not a client
    fetch-registry: false
  server:
    enable-self-preservation: true  # default; see the heartbeat topic

INFO  c.n.eureka.DefaultEurekaServerContext : Initializing ...
INFO  c.n.e.r.PeerAwareInstanceRegistryImpl  : Changing status to UP
INFO  o.s.b.w.embedded.tomcat.TomcatWebServer: Tomcat started on port 8761 (http)
INFO  .s.c.n.e.s.EurekaAutoServiceRegistration : Updating port to 8761
INFO  c.s.d.DiscoveryServerApplication       : Started DiscoveryServerApplication in 4.21 seconds

Open http://localhost:8761 in a browser. You see the Eureka dashboard with the table "Instances currently registered with Eureka" (empty for now).

One registry is a single point of failure. In production run 2–3 Eureka servers that replicate to each other (peer awareness):

# eureka-1
eureka:
  client:
    service-url:
      defaultZone: http://eureka-2:8761/eureka/,http://eureka-3:8761/eureka/