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Docker Orchestration

You're reading from Docker Orchestration A concise, fast-paced guide to orchestrating and deploying scalable services with Docker

Product type Paperback

Published in Jan 2017

Publisher Packt

ISBN-13 9781787122123

Length 284 pages

Edition 1st Edition

Languages

Go

Tools

Docker

Concepts

Containerization

Authors (2):

Randall Smith

Gianluca Arbezzano

View More author details

Table of Contents (11) Chapters

Preface

1. Getting Started with Docker Orchestration FREE CHAPTER

2. Building Multi-Container Applications with Docker Compose

3. Cluster Building Blocks – Registry, Overlay Networks, and Shared Storage

4. Orchestration with Docker Swarm

5. Deploying and Managing Services with Kubernetes

6. Working with Mesosphere

7. Using Simpler Orchestration Tools – Fleet and Cattle

8. Monitoring Your Cluster

9. Using Continuous Integration to Build, Test, and Deploy Containers

10. Why Stop at Containers? Automating Your Infrastructure

Scaling down nodes

One of the benefits of cloud computing is the ability to scale down the number of hosts when they are no longer needed. For example, a web store may increase the number of hosts during the Christmas shopping season and then scale them down in January. How that happens will, again, depend on the orchestration solution chosen and the platform it is running on.

Most orchestration systems have a command that will shut down containers on a specific node and reschedule them elsewhere in the cluster. This gives the orchestration tool a chance to cleanly move services around the cluster before a node is removed. Services such as Docker Cloud and GKE take care of that automatically.

The command to change the node's availability could be added to the shut down scripts. However, care must be made to ensure that all of the containers have stopped before the system is shutdown. In most cases, another command will need to be run to permanently remove a node from the cluster. Again...

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Authors (2)

Arbezzano

Arbezzano

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Randall Smith

Randall Smith

Randall Smith is a senior systems administrator at Adams State University. He has been administering Windows, Linux, and BSD systems since 1999. He has been active in helping other sysadmins solve problems online and off. He has presented at the Colorado Higher Ed Computing Organization and Educause conferences on topics including Linux KVM and Ceph. In his spare time, Randall streams Let's Play gaming videos at Music Free Gaming on YouTube and Twitch.

See other products by Randall Smith

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