Book Image

Mastering Docker

By : Scott Gallagher
Book Image

Mastering Docker

By: Scott Gallagher

Overview of this book

<p><span id="description" class="sugar_field">Docker has been a game-changer when it comes to virtualization – it has now grown to become a key driver of innovation beyond system administration, having an impact on the world of web development and more. But how can you make sure you’re keeping up with the innovations that it’s driving? How can you be sure you’re using it to its full potential? Mastering Docker shows you how – it not only demonstrates how to use Docker more effectively, it also helps you rethink and reimagine what’s possible with Docker.</span></p> <p><span class="sugar_field"><span id="description" class="sugar_field"> Covering best practices to make sure you’re confident with and the basics, such as building, managing and storing containers, before diving deeper into Docker security, you’ll find everything you need to help you extend and integrate Docker in new and innovative ways. You’ll learn how to take greater control over your containers using some of Docker’s most sophisticated and useful tools, such as Docker compose and Docker swarm, before bringing together everything you already know and have learned to put your containers into production and monitor them for safety and performance.</span></span></p> <p><span class="sugar_field"><span class="sugar_field"><span id="description" class="sugar_field"> Beyond this, you’ll also explore even more advanced strategies, as you learn how to extend and integrate Docker with cloud platforms such as Heroku and OpenStack, and how tools such as Kubernetes can improve the way you manage large-scale container orchestration. With further guidance on how you can use configuration management tools such as Puppet, Chef and PowerShell, by the end of the book you’ll have a broad and detailed sense of exactly what’s possible with Docker – and how seamlessly it fits with a range of other platforms and tools.</span></span></span></p>
Table of Contents (20 chapters)
Mastering Docker
Credits
About the Author
About the Reviewer
www.PacktPub.com
Preface
Index

Common issues and solutions


What are some common issues that others have run into putting their environments into production while using various Docker products? What are the solutions to those common issues? How can we mitigate against these issues so that no further instances occur? Let's take a look at what we can do!

Docker images

When you are using images, remember two things:

  • Each image you pull takes up space

  • Each time you run an image, that particular run is stored using disk space

If you are running low on space, this might be something to keep an eye on before it becomes a problem. If the space fills up, the containers might stop working, and this might lead to loss of data. Now you can view the images that you currently have by running a simple command:

$ docker images 

To remove a particular image, we can run another command:

$ docker rmi <image_name>

But what about those images whose run is stored using disk space? How do we view them? There is a switch that can be added onto...