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

Driving configuration changes through Jenkins

Next, we will learn how to make changes to the production system by running scripts from the Git repository hosted in Jenkins. We can use Jenkins both to build the Docker containers for the application and to deploy those containers on the production server. That way, any changes to either the program or to its Dockerfile or the docker-compose.yml file can be propagated through automation to the production system.

Here are some tips for integrating Jenkins with other systems, including GitHub, that can make your life easier. The first tip relates to the best way to configure Jenkins with a Jenkinsfile—by storing it in a version control system.

Using Git and GitHub to store your Jenkinsfile

In the previous section, we used Jenkinsfile entered directly into a Jenkins job to do some quick testing. That works well for doing exploratory work, but to build and manage a more complex set of scripts, you should use Git version control...