Explore different technologies for the implementation of microservices while highlighting their advantages and disadvantages.

Microservices Architecture

This module focuses on the various implementations of microservices. We’ll learn approaches for tech stacks that can be used to implement microservices. We’ll also discuss the pros and cons of each approach.
We’ll start by exploring some fundamental concepts for implementing microservices. Within each concept, we’ll learn about the different technologies used to implement it. The technologies include front-end integration with Edge Side Includes (ESI), asynchronous microservices with Kafka and REST feeds, synchronous microservices with the Netflix stack, and Consul, Docker, Kubernetes, and Cloud Foundry. Each technology is described and then demonstrated with real code.

Microservices Architecture: Practical Implementation

The domain structure is identical to the example in the Netflix
chapter ([chapter 10](https://www.educative.io/courses/microservice-architecture-practical-implementation/introduction-YVgRzwVEQy2)) (see
the drawing below) and consists of **three
microservices**.





* The **catalog** microservice manages the information such as price and name for the items that can be ordered.


* The **customer** microservice stores customer data.

* The **order** microservice can accept new orders. It uses the catalog
  and customer microservice.

# Architecture of the example

The example in this chapter uses [Consul](https://www.consul.io/) for
service discovery and [Apache httpd server](https://httpd.apache.org/)
for routing the HTTP requests.

An overview of the Docker containers is shown in the drawing below. The three microservices provide their UI and REST interfaces at the port 8080. They are only
accessible within the network between the Docker containers. Consul
offers port 8500 for the REST interface and the HTML UI as well as UDP
port 8600 for DNS requests. 

These two ports are bound to the Docker host and are accessible from other computers. The Docker host also provides the Apache httpd at port 8080. Apache httpd forwards calls to the microservices in the Docker network so that the microservices can also be accessed from outside.


In this lesson, we'll introduce an example.

Example