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

Chapter 6: Deploying Applications with Docker Compose

The simplest possible practical deployment scenario of an application packaged with Docker involves running Docker Compose on a single host. Many of the commands that you use as a developer, such as docker-compose up -d, also apply to deploying Docker applications on a single host.

Running Docker applications on a single host is easier to understand than running them using one of the more complex container orchestration systems because many of the same techniques you might use to run a non-Docker application apply; however, it has some significant drawbacks in terms of performance and availability.

In this chapter, you will discover why this is the simplest practical option, learn how to configure Docker for production on a single host, and master some techniques for managing and monitoring a simple setup efficiently. Furthermore, you will better understand the drawbacks of running Docker on a single host, including the...