Book Image

Learn Docker - Fundamentals of Docker 18.x

By : Dr. Gabriel N. Schenker
Book Image

Learn Docker - Fundamentals of Docker 18.x

By: Dr. Gabriel N. Schenker

Overview of this book

Docker containers have revolutionized the software supply chain in small and big enterprises. Never before has a new technology so rapidly penetrated the top 500 enterprises worldwide. Companies that embrace containers and containerize their traditional mission-critical applications have reported savings of at least 50% in total maintenance cost and a reduction of 90% (or more) of the time required to deploy new versions of those applications. Furthermore they are benefitting from increased security just by using containers as opposed to running applications outside containers. This book starts from scratch, introducing you to Docker fundamentals and setting up an environment to work with it. Then we delve into concepts such as Docker containers, Docker images, Docker Compose, and so on. We will also cover the concepts of deployment, orchestration, networking, and security. Furthermore, we explain Docker functionalities on public clouds such as AWS. By the end of this book, you will have hands-on experience working with Docker containers and orchestrators such as SwarmKit and Kubernetes.
Table of Contents (21 chapters)
Title Page
Packt Upsell
Contributors
Preface
Index

Overview of popular orchestrators


At the time of writing, there are many orchestration engines out there and in use. But there are a few clear winners. The number one spot is clearly held by Kubernetes, which reigns supreme. A distant second is Docker's own SwarmKit, followed by others such as Apache Mesos, AWS Elastic Container Service (ECS), or Microsoft Azure Container Service (ACS).

Kubernetes

Kubernetes was originally designed by Google and later donated to the Cloud Native Computing Foundation (CNCF). Kubernetes was modeled after Google's proprietary Borg system, which has been running containers on supermassive scale for years. Kubernetes was Google's attempt to go back to the drawing board and completely start over and design a system that incorporates all the lessons learned with Borg.

Contrary to Borg, which is proprietary technology, Kubernetes was open sourced early on. This was a very wise choice by Google, since it attracted a huge number of contributors from outside of the company...