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)

Orchestrating Containers

In the earlier chapters, we laid down a strong foundation on the need for container networking, how to run a service inside a Docker container, and how to expose this service to the outside world by opening up network ports and other prerequisites. However, recently, there are advanced mechanisms being made available and a few third-party orchestration platforms hitting the market for sagaciously establishing dynamic and decisive linkages between distributed and differently-enabled containers in order to compose powerful containers for comprehensively, yet compactly containing process-centric, multi-tiered, and enterprise-class distributed applications. In the extremely diversified yet connected world, the concept of orchestration cannot be kept away from the deserved prominence for long. This chapter is precisely allocated for explaining the nitty-gritty of container orchestration, and...