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)

Envisaging container as a service

We laid a good foundation of the fundamentals of the Docker technology. In this section, we are going to focus on crafting an image with the HTTP service, launch the HTTP service inside the container using the crafted image, and then, demonstrate the connectivity to the HTTP service running inside the container.

Building an HTTP server image

In this section, we are going to craft a Docker image in order to install Apache2 on top of the Ubuntu 16.04 base image, and configure an Apache HTTP server to run as an executable, using the ENTRYPOINT instruction.

In Chapter 3, Building Images, we illustrated the concept of Dockerfile to craft an Apache2 image on top of the Ubuntu 16.04 base image. Here, in this example, we are going to extend...