Book Image

Learn Docker - Fundamentals of Docker 19.x - Second Edition

By : Dr. Gabriel N. Schenker
Book Image

Learn Docker - Fundamentals of Docker 19.x - Second Edition

By: Dr. Gabriel N. Schenker

Overview of this book

Containers enable you to package an application with all the components it needs, such as libraries and other dependencies, and ship it as one package. Docker containers have revolutionized the software supply chain in both small and large enterprises. Starting with an introduction to Docker fundamentals and setting up an environment to work with it, you’ll delve into concepts such as Docker containers, Docker images, and Docker Compose. As you progress, the book will help you explore deployment, orchestration, networking, and security. Finally, you’ll get to grips with Docker functionalities on public clouds such as Amazon Web Services (AWS), Azure, and Google Cloud Platform (GCP), and learn about Docker Enterprise Edition features. Additionally, you’ll also discover the benefits of increased security with the use of containers. By the end of this Docker book, you’ll be able to build, ship, and run a containerized, highly distributed application on Docker Swarm or Kubernetes, running on-premises or in the cloud.
Table of Contents (25 chapters)
1
Section 1: Motivation and Getting Started
4
Section 2: Containerization, from Beginner to Black Belt
11
Section 3: Orchestration Fundamentals and Docker Swarm
18
Section 4: Docker, Kubernetes, and the Cloud

Creating a Docker Swarm

Creating a Docker Swarm is almost trivial. It is so easy that it seems unreal if you know what an orchestrator is all about. But it is true, Docker has done a fantastic job in making Swarms simple and elegant to use. At the same time, Docker Swarm has been proven in use by large enterprises to be very robust and scalable.

Creating a local single node swarm

So, enough imagining — let's demonstrate how we can create a Swarm. In its most simple form, a fully functioning Docker Swarm consists only of a single node. If you're using Docker for Mac or Windows, or even if you're using Docker Toolbox, then your personal computer or laptop is such a node...