Book Image

Docker for Developers

By : Richard Bullington-McGuire, Andrew K. Dennis, Michael Schwartz
2 (1)
Book Image

Docker for Developers

2 (1)
By: Richard Bullington-McGuire, Andrew K. Dennis, Michael Schwartz

Overview of this book

Docker is the de facto standard for containerizing apps, and with an increasing number of software projects migrating to containers, it is crucial for engineers and DevOps teams to understand how to build, deploy, and secure Docker environments effectively. Docker for Developers will help you understand Docker containers from scratch while taking you through best practices and showing you how to address security concerns. Starting with an introduction to Docker, you’ll learn how to use containers and VirtualBox for development. You’ll explore how containers work and develop projects within them after you’ve explored different ways to deploy and run containers. The book will also show you how to use Docker containers in production in both single-host set-ups and in clusters and deploy them using Jenkins, Kubernetes, and Spinnaker. As you advance, you’ll get to grips with monitoring, securing, and scaling Docker using tools such as Prometheus and Grafana. Later, you’ll be able to deploy Docker containers to a variety of environments, including the cloud-native Amazon Elastic Kubernetes Service (Amazon EKS), before finally delving into Docker security concepts and best practices. By the end of the Docker book, you’ll be able to not only work in a container-driven environment confidently but also use Docker for both new and existing projects.
Table of Contents (21 chapters)
1
Section 1: An Introduction to Docker – Containers and Local Development
6
Section 2: Running Docker in Production
14
Section 3: Docker Security – Securing Your Containers

Summary

In this chapter, we learned how to break up an application that would normally be run in a virtual machine with multiple services (MongoDB, Redis, and Mosca) into a microservices-based architecture run as containers within Docker.

We learned how to navigate the Docker Hub website and find useful pre-made Docker containers that you simply download and run.

We also learned how to package our own microservices as Docker containers and how we can push them to Docker Hub for the public or development team members to use.

Several containers were used to launch the complete application as microservices communicated through ports mapped to the host's ports. This is not ideal, especially if you already have a WWW server running on port 80; Mosca uses port 80, too.

In the next chapter, we will discuss how we can use the Docker Compose tool to design complete microservice architecture applications and run them so that they have a private internal network and so host ports...