Book Image

Docker Orchestration

By : Randall Smith
Book Image

Docker Orchestration

By: Randall Smith

Overview of this book

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.
Table of Contents (17 chapters)
Docker Orchestration
About the Author
About the Reviewer
Customer Feedback

Building an image with Docker Engine

They say the longest journey begins with a single step. In this case, an application begins with a single image. More often than not, existing images will not be perfect fits. This will certainly be the case if you are deploying your own services.

It all starts with a Dockerfile. This file provides detailed instructions to Docker for building an image. There are a lot of things that can be done in a Dockerfile. Specific operating system packages or language libraries can be installed; configuration files can be put into place; and a default command can be set. It is best to base a new image for an application off an official image, when possible. For example, an application written in Ruby should be based off of the official ruby image. A full reference of the Dockerfile directives can be found at .

Building from a Dockerfile

Back in Chapter 1 , Getting Started with Docker Orchestration, we started with...