Book Image

Learning Docker - Second Edition

By : Vinod Singh, Pethuru Raj, Jeeva S. Chelladhurai
Book Image

Learning Docker - Second Edition

By: Vinod Singh, Pethuru Raj, Jeeva S. Chelladhurai

Overview of this book

Docker is an open source containerization engine that offers a simple and faster way for developing and running software. Docker containers wrap software in a complete filesystem that contains everything it needs to run, enabling any application to be run anywhere – this flexibily and portabily means that you can run apps in the cloud, on virtual machines, or on dedicated servers. This book will give you a tour of the new features of Docker and help you get started with Docker by building and deploying a simple application. It will walk you through the commands required to manage Docker images and containers. You’ll be shown how to download new images, run containers, list the containers running on the Docker host, and kill them. You’ll learn how to leverage Docker’s volumes feature to share data between the Docker host and its containers – this data management feature is also useful for persistent data. This book also covers how to orchestrate containers using Docker compose, debug containers, and secure containers using the AppArmor and SELinux security modules.
Table of Contents (13 chapters)

Getting Started with Docker

Docker is undeniably the most popular technology these days in the Information Technology (IT) world. Mainly, there are two principal trends in the Docker landscape. First, the open source Docker platform is being continuously equipped with more correct and relevant features and functionalities in order to make it the most powerful and pioneering IT platform, not only for software developers but also for on-premise and off-premise IT operational teams. The second trend is the unprecedented adoption of the Docker-inspired containerization technology by various IT service and solution providers across the Globe in order to bring forth a growing array of premium offerings to their consumers and clients. The enhanced simplicity in the development of fresh software applications, the automated and accelerated deployment of Docker containers, and the extreme maneuverability of Docker containers are being widely touted as the key differentiators of this unique paradigm's unprecedented success.

In this chapter, we would like to shed more light on Docker, and show why it is being touted as the latest best thing for the impending digital idea and insightful economy. We would like to introduce you to the practical side of Docker; in this chapter, we will cover the following topics:

  • The key drivers for Dockerization
  • Differentiating between containerization and virtualization
  • Installing the Docker Engine
  • Understanding the Docker setup
  • Downloading the first image
  • Running the first container
  • Troubleshooting Docker containers