Book Image

Learn Docker - Fundamentals of Docker 18.x

By : Dr. Gabriel N. Schenker
Book Image

Learn Docker - Fundamentals of Docker 18.x

By: Dr. Gabriel N. Schenker

Overview of this book

Docker containers have revolutionized the software supply chain in small and big enterprises. Never before has a new technology so rapidly penetrated the top 500 enterprises worldwide. Companies that embrace containers and containerize their traditional mission-critical applications have reported savings of at least 50% in total maintenance cost and a reduction of 90% (or more) of the time required to deploy new versions of those applications. Furthermore they are benefitting from increased security just by using containers as opposed to running applications outside containers. This book starts from scratch, introducing you to Docker fundamentals and setting up an environment to work with it. Then we delve into concepts such as Docker containers, Docker images, Docker Compose, and so on. We will also cover the concepts of deployment, orchestration, networking, and security. Furthermore, we explain Docker functionalities on public clouds such as AWS. By the end of this book, you will have hands-on experience working with Docker containers and orchestrators such as SwarmKit and Kubernetes.
Table of Contents (21 chapters)
Title Page
Packt Upsell
Contributors
Preface
Index

Chapter 7. Single-Host Networking

In the last chapter, we learned about the most important architectural patterns and best practices that are used when dealing with a distributed application architecture.

In this chapter, we will introduce the Docker container networking model and its single-host implementation in the form of the bridge network. This chapter also introduces the concept of software-defined networks and how they are used to secure containerized applications. Finally, it demonstrates how container ports can be opened to the public and thus make containerized components accessible to the outside world.

This chapter will contain the following topics:

  • The container network model
  • Network firewalling
  • The bridge network
  • The host network
  • The null network
  • Running in an existing network namespace
  • Port management

After completing this module, you will be able to do the following:

  • Draft the container networking model—along with all the essential components onto a whiteboard
  • Create and delete a custom...