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

Questions

To assess the skills that you have gained from this chapter, please try to answer the following questions:

  1. Name the three core elements of the container network model (CNM).
  2. How do you create a custom bridge network called, for example, frontend?
  3. How do you run two nginx:alpine containers attached to the frontend network?
  4. For the frontend network, get the following:
    • The IPs of all the attached containers
    • The subnet associated with the network
  5. What is the purpose of the host network?
  1. Name one or two scenarios where the use of the host network is appropriate.
  2. What is the purpose of the none network?
  3. In what scenarios should the none network be used?
  4. Why would we use a reverse proxy such as Traefik together with our containerized application?