/docker-microservices

Implementation of a microservice architecture with Docker.

Primary LanguagePHPMIT LicenseMIT

Microservices & Docker

Main source of inspiration: Introduction to Microservices, Docker and Kubernetes (video)

Microservices Architecture

  • What are microservices ?

    • Several smaller applications communicating via well defined APIs - usually HTTP.

  • Monolithic versus microservices architecture

  • Microservices advantages

    • Dynamically SCALABLE at runtime (major advantage)

  • Microservices disadvantages

    • Complex networking, Overhead on database and servers

Docker

  • What is Docker ?

  • What are containers ?

    • Differences of Docker Containers and Virutal Machines:
      • Docker translation layer (no GUEST OS).
      • Containers share Bins/Libs.

  • Dockerfile

Docker compose

  • What is Docker Compose and how it performs container orchestration ?
  • Example of a docker-compose file (YAML).
  • Scaling up containers with docker-compose.

Let's see in action

Implementation of a microservice architecture with Docker.

Docker hello world

$ docker ps --all # List all containers

$ docker run hello-world

A more interesting hello world: Tutum Hello World!

$ sudo docker run -d -p 3000:80 tutum/hello-world

Scaling up: change the port, get different instances running.

Docker concise tutorial

Learn Docker in 12 Minutes 🐳 (video)

$ docker build -t hello-world-php .

$ docker run -it --rm --name hello-world hello-world-php

$ docker run -p 80:80 -v /home/hgtllys/projects/docker-microservices/helloPHP/src:/var/www/html hello-world-php

Docker compose concise tutorial

Learn Docker Compose in 12 minutes 🐙 (video)

Implementation of a simple website in PHP consuming an API written in Python (Flask).

More information about networking with containers: Networking in Compose .

Microservice example