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

Chapter 5

Here are some sample answers to the questions presented in this chapter:

The easiest way to play with volumes is to use the Docker Toolbox because when directly using Docker for Desktop, the volumes are stored inside a (somewhat hidden) Linux VM that Docker for Desktop uses transparently.
Thus, we suggest the following:

$ docker-machine create --driver virtualbox volume-test
$ docker-machine ssh volume-test

And now that you're inside a Linux VM called volume-test, you can do the following exercise:

  1. To create a named volume, run the following command:
$ docker volume create my-products
  1. Execute the following command:
$ docker container run -it --rm \
-v my-products:/data:ro \
alpine /bin/sh
  1. To get the path on the host for the volume, use this command:
$ docker volume inspect my-products | grep Mountpoint

This (if you're using docker...