在Eureka Server中，未在Spring中开发的服务/应用程序的发现和注册

Question

How can web applications built without Spring (say, on Java-JEE and Go) be discovered and registered in Eureka Server ?

In a Spring-Boot application, it is easy to add these annotations:

@EnableDiscoveryClient
@SpringBootApplication

before

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

and in configuration, application.properties

eureka.client.register-with-eureka=true
eureka.client.fetch-registry=true

But for applications which were built not as Spring-Boot or for that matter as Microservices, how should they be discovered and registered as clients by Eureka Server

Answer 1

It's like any other backend service; you have to use the right client. For example, if you have non-spring Java services, you could use;

InstanceInfo nextServerInfo = DiscoveryManager.getInstance()
                .getDiscoveryClient()
                .getNextServerFromEureka(vipAddress, false);

        Socket s = new Socket();
        int serverPort = nextServerInfo.getPort();
        try {
            s.connect(new InetSocketAddress(nextServerInfo.getHostName(),
                    serverPort));
        } catch (IOException e) {
            System.err.println("Could not connect to the server :"
                    + nextServerInfo.getHostName() + " at port " + serverPort);
        }

https://github.com/Netflix/eureka/wiki/Understanding-eureka-client-server-communication

Here's a Python client;

https://pypi.org/project/py-eureka-client/

A golang client;

https://github.com/hudl/fargo