DevOps with Docker outlines the power of containerization and the influence this innovation has on development teams and general operations. We also get to understand what DevOps really is, the principles involved, and how the process contributes to product health, by implementing a Docker workflow. Docker is an open source containerization tool that makes it easier to streamline product delivery and reduce the time it takes to get from a whiteboard sketch of the business to a money-back implementation.
The book will provide knowledge of the following:
Docker and DevOps and why and how they integrate
What containers are, and how to create and manage them
Scaling a delivery pipeline and multiple deployments with Docker
Orchestration and delivery of containerized applications
Lesson 1, Images and Containers, shows how Docker improved a DevOps workflow and the basic Docker terminal commands that will be used in this book. We will learn the Dockerfile syntax in order to build images. We will run containers from images. We will then version images and Docker hub and deploy a Docker image to the Docker hub.
Lesson 2, Application Container Management, explores the docker-compose tool and gives an overview of a multi-container application setup. We will then manage multiple containers and distribute application bundles. Lastly, we will network with docker-compose.
Lesson 3, Orchestration and Delivery, gives us an overview of a Docker Swarm. We will then use the Docker engine to create a Swarm and manage services and applications in a Swarm. Finally, we will scale services up and down to test for a real-world application scenario.
This book will require the following minimum hardware requirements:
Processor: 1.8 GHz or higher (Core 2 Duo and above)
Memory: Minimum 2GB RAM
Hard disk: Minimum 10 GB
A stable internet connection (for pulling and pushing images)
Operating System: Windows 8 or higher
Browser: Google Chrome or Mozilla Firefox (latest updates installed)
Docker installed
This book is ideal for developers, system architects, junior and mid-level site reliability engineers who wish to adopt Docker workflow for consistency, speed, and isolation in applications. You need to have a basic knowledge about UNIX concepts such as ssh, ports, and logs as we dive into Docker.
In this book, you will find a number of text styles that distinguish between different kinds of information. Here are some examples of these styles and an explanation of their meaning.
Code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles are shown as follows: "Once you have created a new directory, access the directory and create a file called run.js."
Any command-line input or output is written as follows:
docker pull
New terms and important words are shown in bold. Words that you see on the screen, for example, in menus or dialog boxes, appear in the text like this: "Clicking the Next button moves you to the next screen."
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You can download the example code files for this book from your account at https://github.com/TrainingByPackt/Beginning-DevOps-with-Docker. If you purchased this book elsewhere, you can visit http://www.packtpub.com/support and register to have the files e-mailed directly to you.
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Before you start with this course, we'll install Docker. You will find the steps to install it here:
Visit to the Docker Toolbox page below: https://docs.docker.com/toolbox/toolbox_install_windows/ in your browser.
Click the installer link to download.
Install Docker Toolbox by double-clicking the installer.
Press Next to accept all the defaults and then install.
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