To get the most out of this book

Docker requires a 64-bit Linux operating system. All examples in this book have been developed using Ubuntu 18.04, but any other Linux system with the kernel version 3.10 or above is sufficient.

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:

Log in or register at www.packt.com.
Select the SUPPORT tab.
Click on Code Downloads & Errata.
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/Continuous-Delivery-with-Docker-and-Jenkins-Second-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: https://www.packtpub.com/sites/default/files/downloads/9781838552183_ColorImages.pdf.

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: "This means that the sudo keyword must precede every Docker command."

A block of code is set as follows:

ExecStart=/usr/bin/dockerd -H <server_ip>:2375

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

import os
print "Hello World from %s !" % os.environ['NAME']

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

$ docker run -i -t ubuntu_with_git /bin/bash
root@6ee6401ed8b8:/# apt-get install -y openjdk-8-jdk
root@6ee6401ed8b8:/# exit
$ docker commit 6ee6401ed8b8 ubuntu_with_git_and_jdk

Bold: Indicates a new term, an important word, or words that you see on screen. For example, words in menus or dialog boxes appear in the text like this. Here is an example: "You should see the friendly Hello World from Python! message."

Warnings or important notes appear like this.

Tips and tricks appear like this.