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Microservice Architecture: Practical Implementation

Eureka: Service Discovery

In this lesson, we'll discuss service discovery with Eureka.

We'll cover the following...

Introduction

Eureka implements service discovery as we learned in the introduction.

For synchronous communication, microservices have to find out at which port and IP address other microservices can be accessed.

Features

Let’s discuss some essential characteristics of Eureka.

REST interface

Eureka has a REST interface.

Microservices can use this interface to register or request information about other microservices.

Replication

Eureka supports replication.

The information from the Eureka servers is distributed to other servers enabling the system to compensate for the failure of Eureka servers.

In a distributed system, service discovery is essential for communication between microservices. Therefore, service discovery must be implemented in a way that a failure of one server does not cause the entire service discovery to fail.

Cache improved performance

Due to caches on the client:

  • The performance of Eureka very good.
  • Availability is improved because the information is stored on the client compensating for server failure.
  • The server only sends information to the client about new or deleted microservices and not information about all registered services, communication very efficient.

Amazon Web Services support

Netflix supports AWS (Amazon ...