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

Configuring Docker hosts

In many ways, Docker abstracts the server away from the application. It no longer matters which Linux distribution a server is running. A Docker application can be based on any distribution available. Multiple applications can run on the same server and use different base images. Despite that, without the server, nothing runs.

In Chapter 9 , Using Continuous Integration to Build, Test, and Deploy Containers, we discussed the importance of having a consistent build process for Docker images because doing so provides consistency and reliability. The same is true for the servers those applications run on. If the servers are not consistent, it could cause problems for the containers running on them. This section will discuss different ways of ensuring that the server images are consistent.

Using configuration management

Configuration management has been around on servers in many forms for decades. Sometimes it was as simple as mounting /usr from a remote server or using...