To get the most out of this book

To get the most out of this book you will need a machine capable of running Docker. This machine should have at least 8 GB RAM and 30 GB HDD free with an Intel i3 or above, running one of the following OSes:

• macOS High Sierra or above
• Windows 10 Professional
• Ubuntu 18.04

Also, you will need access to one or all of the following public cloud providers: DigitalOcean, Amazon Web Services, Microsoft Azure, and Google Cloud.

Download the example code files

You can download the example code files for this book from your account at www.packt.com. If you purchased this book elsewhere, you can visit www.packt.com/support and register to have the files emailed directly to you.

You can download the code files by following these steps:

1. Log in or register at www.packt.com.
2. Select the SUPPORT tab.
3. Click on Code Downloads & Errata.
4. Enter the name of the book in the Search box and follow the onscreen instructions.

Once the file is downloaded, please make sure that you unzip or extract the folder using the latest version of:

• WinRAR/7-Zip for Windows
• Zipeg/iZip/UnRarX for Mac
• 7-Zip/PeaZip for Linux

The code bundle for the book is also hosted on GitHub at https://github.com/PacktPublishing/Mastering-Docker-Third-Edition. In case there's an update to the code, it will be updated on the existing GitHub repository.

We also have other code bundles from our rich catalog of books and videos available at https://github.com/PacktPublishing/. Check them out!

Download the color images

We also provide a PDF file that has color images of the screenshots/diagrams used in this book. You can download it here: http://www.packtpub.com/sites/default/files/downloads/9781789616606_ColorImages.pdf.

Code in Action

Visit the following link to check out videos of the code being run:
http://bit.ly/2PUB9ww

Conventions used

There are a number of text conventions used throughout this book.

CodeInText: Indicates code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles. Here is an example: "The first file is nginx.conf, which contains a basic nginx configuration file."

A block of code is set as follows:

user nginx;
worker_processes 1;

error_log /var/log/nginx/error.log warn;
pid /var/run/nginx.pid;

events {
    worker_connections 1024;
}

Any command-line input or output is written as follows:

$ docker image inspect <IMAGE_ID>

Bold: Indicates a new term, an important word, or words that you see onscreen. For example, words in menus or dialog boxes appear in the text like this. Here is an example: "Upon clicking on Create, you will be taken to a screen similar to the next screenshot."

Warnings or important notes appear like this.

Tips and tricks appear like this.