Gain insights into microservice principles, their pros and cons, Micro and Macro architecture, migration strategies, Docker's role, and technologies to effectively implement microservices.

docker_ms2_v3.tar.gz

SpringBoot

test

SpringMain

ms-1-scs-esi

SpringMain-copy

scs-esi

scs-esi-copy

scs-esi-up

Microservices are one of the most important and popular software architecture trends. This architecture forms the base for a lot of companies including: Amazon, Netflix, Spotify, and Uber. 

In this course you’ll learn microservices in depth and understand reasons for and against microservices. Beyond that, you’ll learn about Micro and Macro architecture, strategies for migrating old systems, the role of Docker in this architecture, and technologies for implementing microservices. 

After taking this course, you’ll be better equipped to implement microservices for your own use.

An Introduction to Microservice Principles and Concepts

# Overview

A typical microservice system contains more than a single Docker
container. As explained in [chapter 2](https://www.educative.io/courses/introduction-microservice-principles-concepts/introduction-N7Y2ZzKNl1p),
microservices are modules of a system. 

It would be good to have a
way to start and run several containers together for starting all the
modules that the system consists of in one go. This can be done with
[Docker Compose](https://docs.docker.com/compose/).


# Service discovery with Docker Compose links

Coordinating a system of multiple Docker containers requires more than
just starting multiple Docker containers. It also requires **configurations for the virtual network** with which the Docker
containers communicate with each other.  In particular, **containers must
be able to find each other in order to communicate**. 

In a Docker
Compose environment, **a service can simply contact another service via
a Docker Compose link** and then use the service name as the hostname.
So it could use a URL like `http://order/` to contact the order
microservice.

Docker Compose links offer some kind of service discovery, that is, a way
for microservices to find other microservices. Synchronous
microservices require a form of service discovery.

Docker Compose links extend Docker links. Docker links only allow
communication. Docker Compose links also implement **load balancing** and
set the start order so that the dependent Docker containers start
first.

## Ports 

In addition, Docker Compose can bind ports from the containers to the
ports of the Docker host where the Docker containers run.

## Volumes 

Docker Compose can also provide volumes. These are file systems that
can be shared by multiple containers. This allows containers to
communicate by exchanging files.



In this lesson, we'll discuss Docker Compose.

Preface

Microservices

Micro and Macro Architecture

Migration

Docker

Technical Micro Architecture

Appendix

Docker Compose

Overview #

Service discovery with Docker Compose links #