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Puppet 4.10 Beginner???s Guide, Second Edition

You're reading from   Puppet 4.10 Beginner???s Guide, Second Edition From newbie to pro with Puppet 4.10

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Product type Paperback
Published in May 2017
Publisher Packt
ISBN-13 9781787124004
Length 268 pages
Edition 2nd Edition
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Author (1):
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John Arundel John Arundel
Author Profile Icon John Arundel
John Arundel
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Table of Contents (14) Chapters Close

Preface 1. Getting started with Puppet FREE CHAPTER 2. Creating your first manifests 3. Managing your Puppet code with Git 4. Understanding Puppet resources 5. Variables, expressions, and facts 6. Managing data with Hiera 7. Mastering modules 8. Classes, roles, and profiles 9. Managing files with templates 10. Controlling containers 11. Orchestrating cloud resources 12. Putting it all together Index

Persistent storage for containers


Containers are designed to be transient; they run for a while and then disappear. Anything inside the container disappears with it, including files and data created during the container's run. This isn't always what we want, of course. If you're running a database inside a container, for example, you usually want that data to persist when the container goes away.

There are two ways of persisting data in a container: the first is to mount a directory from the host machine inside the container, known as a host-mounted volume, and the second is to use what's called a Docker volume. We'll look at both of these in the following sections.

Host-mounted volumes

If you want a container to be able to access files on the host machine's filesystem (such as application code that you're working on and that you want to test, for example), the easiest way to do that is to mount a directory from the host on the container. The following example shows how to do this (docker_mount...

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