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

Chapter 11: Scaling and Load Testing Docker Applications

Technology giants such as Google, Facebook, Lyft, and Amazon use container orchestration systems in part so that they can run their massive computing resources at very high levels of utilization. To do that, you must have a way to scale your applications across a fleet of servers, which might be dynamically allocated from a cloud provider. Even if you have a cluster that can scale out with high traffic and scale back in when demand subsides, you may still need additional tools to make sure it operates correctly. You also need to ensure that the service degrades gracefully if capacity limits are exceeded.

You can use a service mesh such as Envoy, Istio, or Linkerd to handle those concerns. Envoy is one of the simpler options in the service mesh arena; it provides both load balancing and advanced traffic routing and filtering capabilities. All these capabilities provide the glue needed to serve traffic to demanding users. Some...