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 GitLab for CI

GitLab is a wonderful tool for CI and deployment for Docker images and services. It combines Git with issue tracking, a Docker Registry, and CI to provide a unified experience. However, this process is not unique to GitLab. The lessons learned in this section should be applicable regardless of the systems used.

Setting up GitLab for CI

GitLab CI is available for free as part of the offerings at It is also possible to pay for an enterprise license which provides more resources. The free community and commercial enterprise editions of GitLab can also be installed locally. In  Chapter 3, Cluster Building Blocks – Registry, Overlay Networks, and Shared Storage we showed how to install GitLab and how to enable the Docker Registry.

A registry is an important part of making CI work. It provides a place for finished images to be stored for use in the cluster. Another registry could be used instead of GitLab. For example, an organization may choose to use the Docker...