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

Chapter 4. Orchestration with Docker Swarm

Docker Swarm is the native orchestration tool for Docker. It was rolled into the core Docker suite with version 1.12. At its simplest, using Docker Swarm is just like using Docker. All of the tools that have been covered still work. Docker Swarm adds a couple of features that make deploying and updating services very nice. You got a glimpse of them in Chapter 3, Cluster Building Blocks – Registry, Overlay Networks, and Shared Storage, which covered Docker overlay networks. Now it is time to dive into the details.

The following topics are covered in this chapter:

  • Creating a swarm

  • Adding and removing nodes

  • Changing node availability

  • Swarm disaster recovery

  • Grouping nodes with labels

  • Creating and stopping services

  • Creating replicas

  • Using global services

  • Using constraints

  • Zero downtime upgrades with rolling updates

  • Using Docker Compose with swarm

  • Using Docker Datacenter