Docker Orchestration

Randall Smith

• Publisher: Packt Publishing
• Year: 2017
• eBook ISBN: 9781787122123
• Edition: 1
• Topic: Computer Science
• Subtopic: Software Development
• Index: Computer Science

A concise, fast-paced guide to orchestrating and deploying scalable services with Docker

About This Book

• Explore the new features added to the core Docker Engine to make multi-container orchestration easy
• Leverage tools such as Docker Machine, Swarm, Compose, and third-party tools such as Kubernetes, Mesosphere, and CoreOS to orchestrate containers
• Use Docker Compose with Swarm and apply rolling updates for zero downtime deployments

Who This Book Is For

This book is aimed at Sysadmins and DevOps engineers who know what Docker does and are now looking to manage multiple containers on multiple hosts using the orchestration feature.

What You Will Learn

• Build scalable, reliable services with Docker
• See how to manage a service in Docker using Docker Swarm, Kubernetes, and Mesosphere
• Discover simpler orchestration tools such as CoreOS/Fleet and Rancher Cattle
• Understand cluster-wide logging, system monitoring, and troubleshooting
• Build, test, and deploy containers using Continuous Integration
• Deploy cluster hosts on cloud services and automate your infrastructure

In Detail

Docker orchestration is what you need when transitioning from deploying containers individually on a single host to deploying complex multi-container apps on many machines.

This book covers the new orchestration features of Docker 1.12 and helps you efficiently build, test, and deploy your application using Docker. You will be shown how to build multi-container applications using Docker Compose. You will also be introduced to the building blocks for multi-host Docker clusters such as registry, overlay networks, and shared storage using practical examples.

This book gives an overview of core tools such as Docker Machine, Swarm, and Compose which will enhance your orchestration skills. You'll learn how to set up a swarm using the decentralized building block. Next, you'll be shown how to make the most out of the in-built orchestration feature of Docker engine and you'll use third-party tools such as Kubernetes, Mesosphere, and CoreOS to orchestrate your existing process. Finally, you will learn to deploy cluster hosts on cloud services and automate your infrastructure.

Style and approach

This comprehensive guide will take you through the orchestration feature of Docker. Using practical examples, you will discover various tools that can be used to manage multiple containers with ease.

Docker Orchestration

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Docker Orchestration

Copyright © 2017 Packt Publishing

All rights reserved. No part of this book may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, without the prior written permission of the publisher, except in the case of brief quotations embedded in critical articles or reviews.

Every effort has been made in the preparation of this book to ensure the accuracy of the information presented. However, the information contained in this book is sold without warranty, either express or implied. Neither the author, nor Packt Publishing, and its dealers and distributors will be held liable for any damages caused or alleged to be caused directly or indirectly by this book.

Packt Publishing has endeavored to provide trademark information about all of the companies and products mentioned in this book by the appropriate use of capitals. However, Packt Publishing cannot guarantee the accuracy of this information.

First published: January 2017

Production reference: 1190117

Published by Packt Publishing Ltd.

Livery Place

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Birmingham

B3 2PB, UK.

ISBN 978-1-78712-212-3

www.packtpub.com

Credits

Author Randall Smith	Copy Editor Tom Jacob
Reviewer Vincent De Smet	Project Coordinator Kinjal Bari
Commissioning Editor Pratik Shah	Proofreader Safis Editing
Acquisition Editor Rahul Nair	Indexer Tejal Daruwale Soni
Content Development Editors Radhika Atitkar Sanjeet Rao	Graphics Kirk D'Penha
Technical Editor Bhagyashree Rai	Production Coordinator Melwyn Dsa

About the Author

Randall Smith is a senior systems administrator at Adams State University. He has been administering Windows, Linux, and BSD systems since 1999.

He has been active in helping other sysadmins solve problems online and off. He has presented at the Colorado Higher Ed Computing Organization and Educause conferences on topics including Linux KVM and Ceph.

In his spare time, Randall streams Let's Play gaming videos at Music Free Gaming on YouTube and Twitch.

I would like to thank my family for their support and understanding as I disappeared into my bedroom for hours at a time to write this book. I would like to thank Adams State University for providing servers used for testing and the opportunity to play with really cool software such as Docker. Finally, I would like to thank the reviewers and everyone at Packt who helped make this book possible.

I want to give a special shout-out to all of the developers and companies who have open-sourced the tools described in this book. You all make it so much much easier for the rest of us to get the job done. Thank you all so much.

About the Reviewer

Vincent De Smet is a Docker Captain with experience as an IT consultant and a DevOps engineer in Vietnam and Singapore, respectively. He's also a co-organizer of the Docker Saigon and Cloud Native Singapore meetups. Vincent loves to deep dive into container internals, is an active speaker, and publishes articles to the docker-saigon.github.io blog.

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Preface

Docker containers are a powerful tool for building and deploying services consistently and reliably. As the number of containers increases, they also become a problem to manage. The problem is only exasperated when the containers are run on multiple hosts. This book shows you how to get started bringing order to the chaos through orchestration.

This book starts by showing you how to get started with Docker then delves into the building blocks that are needed for a Docker cluster. It shows you how to use the "Big Three" orchestration tools—Docker Swarm, Kubernetes, and Mesosphere. It will also introduce two additional tools, Fleet and Cattle, which can be simpler to use and install, but very powerful.

Finally, you will be introduced to tools that make life simpler for people managing clusters and developers creating images that will be run. You will explore tools to monitor clusters and see where the performance bottlenecks are. You will see how to use continuous integration to consistently and reliably build, test, and deploy Docker images. Finally, this book will show you how to apply the same principles to the hosts that Docker is running on.

What this book covers

Chapter 1, Getting Started with Docker Orchestration , gets you started with using Docker. It shows you how to install Docker locally and on popular cloud services such as Amazon Web Services, Google Compute Engine, and Microsoft Azure.

Chapter 2, Building Multi-Container Applications with Docker Compose , provides an introduction to building multi-container applications with Docker Compose. It also shows how to use named networks for data isolation and data volumes to share data.

Chapter 3 , Cluster Building Blocks – Registry, Overlay Networks, and Shared Storage , describes the building blocks that are needed for a Docker cluster. You will explore the registry, overlay networks, and shared storage and learn why they are needed.

Chapter 4 , Orchestration with Docker Swarm , shows you how to create and manage a cluster with Docker Swarm. You will learn how to manage services, ru...

Table of contents

• Docker Orchestration