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

Other composition tools

We have already seen how we can compose and build a multiple service application using docker-compose and .sh scripts. But there are some other options that you may want to consider.

Docker Swarm

Docker Swarm is a cluster management system. It allows you to deploy containers that are defined with docker-compose to a cluster of nodes or servers. There are some limitations to what you can do with docker-compose.yml if you want to use Docker Swarm. For example, you cannot use volumes with Docker Swarm, and binding container ports to the host should be carefully planned.

Kubernetes

Kubernetes is a feature-rich alternative to docker-compose. It allows containers to be deployed to a cluster of Docker container servers and uses a configuration file format similar to docker-compose.yml.

Packer

Packer is a tool that generates several output formats, including Docker containers. You define your containers using JSON files and the tool reads from them...