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

Using shared network storage for Docker volumes

One of the biggest challenges with running a Docker cluster is figuring out what to do with the data. Docker supports using volumes to store data. By default, the volumes store data on the Docker host. What happens if that container is started on another host? None of the data is available. For most applications, this is a problem.

Docker solved this problem by creating a pluggable storage system. Volumes can be created that connect to a wide variety of storage systems. Those systems can be anything from traditional network storage such as a Network File System (NFS) and Internet Small Computer System Interface (iSCSI) to cloud services such as Amazon S3 or clustered storage systems such as Gluster or Ceph.

Each storage option has its pros and cons. Some may be better suited to some workloads than others. Fortunately, you can choose the best solution on a per-container basis. A public web server may run in Amazon EC2 and need storage there while...