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)

Summary

This chapter was incorporated into this book in order to provide you with all the probing and prescribing details on seamlessly orchestrating multiple containers. We extensively discussed the need for container orchestration and the enabling tools to simplify and streamline the increasingly complicated process of container orchestration. In order to substantiate how orchestration is handy and helpful in crafting enterprise-class containers and to illustrate the orchestration process, we took the widely followed way of explaining the whole gamut through a simple example. We developed a web application and contained it within a standard container. Similarly, we took a database container, which is a backend for the frontend web application. The database gets executed inside another container. We saw how to make the web application container aware of the database, using different technologies through the container...