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
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Chapter 7. Using Simpler Orchestration Tools – Fleet and Cattle

Docker Swarm, Kubernetes, and Mesosphere are the big players in Docker orchestration, but they are hardly the only ones. In some cases, they are overkill. This chapter will look at two of the other options—Fleet and Cattle. Each tool has its own strengths and weaknesses. Fleet is a lower-level tool that is great for small environments or as a base for other tools. Cattle is a fully featured orchestration suite that is simpler to use than Kubernetes or Mesosphere.

This chapter will cover the following topics:

  • Using Fleet

    • Installing Fleet

    • Using fleetctl to start, stop, and remove services

    • Using environment variables with Fleet unit files to configure containers

    • Setting service affinity and anti-affinity for high availability

    • Using sidekick services

    • Running global services

  • Using Rancher Cattle

    • Installing Rancher Server, agents, and clients

    • Managing application stacks with rancher-compose

    • Perform zero downtime upgrades

    • Configuring health...