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

What is the minimum realistic production environment?

Docker can run on a wide variety of hardware and software, but the level of support you will receive from either Docker itself or from a third party, such as an operating system distribution that bundles Docker, may vary significantly. Docker can run on a wide variety of operating systems: Linux, Apple macOS, Microsoft Windows, and even IBM S/390x.

Bare minimum – run Docker and Docker Compose on one host

Given the wide distribution of Docker on different environments, the minimum production environment for a Docker-hosted application is a single host, whether it is physical or virtual, running an operating system that supports Docker and Docker Compose. Many popular mainstream operating systems and distributions have some version of Docker built in, including the current Long-Term Support (LTS) versions of Ubuntu (16.04, 18.04, and 20.04) and CentOS (7 and 8). Other more specialized operating systems, such as CoreOS...