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

Implementing a MongoDB container for our application

We can explore using pre-built containers from Docker Hub by implementing a MongoDB container. We'll use this container later as part of a demo application that is made up of several containers that work together.

We will use the official Docker image for MongoDB, found on the Docker Hub website at https://hub.docker.com/_/mongo. We will create a .sh script to start running our image within Docker so that the startup process is easy and repeatable.

We learned in Chapter 2, Using VirtualBox and Docker Containers for Development, that we can expose a container's network ports to the host. That means we can run this MongoDB container image in Docker and access the running MongoDB server within that container by accessing the MongoDB port on the host.

In the GitHub repository (https://github.com/PacktPublishing/Docker-for-Developers) for this book, there is a chapter3/ directory, which is a companion for this chapter...