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 Envoy, and why might I need it?

Envoy (https://www.envoyproxy.io/) is a C++ open source service mesh and edge proxy geared toward microservice deployments. Developed by a team at Lyft, it is especially useful for teams developing Kubernetes-hosted applications, such as the ones you have seen throughout this book.

So, why exactly would we need to deploy Envoy? When developing cloud-based production systems that use multiple containers to host a distributed service, many of the problems you will encounter are related to observability and networking.

Envoy aims to solve these two problems by introducing a proxy service that offers runtime-configurable networking and metrics collection that can be used as a building block for creating higher-level systems that manage these concerns. Whether you're building out a small distributed application or a large microservice architecture designed around the service mesh model, Envoy's features allow us to abstract the thorny...