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)

Automating the build process for images

You learned how to build images locally and push these images to Docker Hub. Docker Hub also has the capability to automatically build the image from the Dockerfile kept in the repository of GitHub or Bitbucket. Automated builds are supported on both the private and public repositories of GitHub and Bitbucket. The Docker Hub Registry keeps all the automated build images. The Docker Hub Registry is open source and can be accessed from https://github.com/docker/docker-registry.

We will discuss the steps needed to implement the automated build process:

  1. We first connect Docker Hub to our GitHub account.
  2. Log in to Docker Hub from https://hub.docker.com/login/, click on Create, and then navigate to Create Automated Build, as shown in the following screenshot:
  1. We'll now select Link Accounts:
  1. Once GitHub is selected, we will select Public and Private (Recommended), as...