Book Image

Mastering Docker - Third Edition

By : Russ McKendrick, Scott Gallagher
Book Image

Mastering Docker - Third Edition

By: Russ McKendrick, Scott Gallagher

Overview of this book

Docker has been a game-changer when it comes to how modern applications are deployed and created. It has now grown into a key driver of innovation beyond system administration, with an impact on the world of web development. But how can you make sure you're keeping up with the innovations it's driving, or be sure you're using it to its full potential? Mastering Docker shows you how; this book not only demonstrates how to use Docker more effectively, but also helps you rethink and reimagine what's possible with it. You will cover concepts such as building, managing, and storing images, along with best practices to make you confident, before delving more into Docker security. You'll find everything related to extending and integrating Docker in new and innovative ways. Docker Compose, Docker Swarm, and Kubernetes will help you take control of your containers in an efficient manner. By the end of the book, you will have a broad, yet detailed, sense of what's possible with Docker, and how seamlessly it fits in with a range of other platforms and tools.
Table of Contents (17 chapters)

Load balancing, overlays, and scheduling

In the last few sections, we looked at launching services and stacks. To access the applications we launched, we were able to use any of the host IP addresses in our cluster; how was this possible?

Ingress load balancing

Docker Swarm has an ingress load balancer built in, making it easy to distribute traffic to our public facing containers.

This means that you can expose applications within your Swarm cluster to services, for example, an external load balancer such as Amazon Elastic Load Balancer, knowing that your request will be routed to the correct container(s) no matter which host happens to be currently hosting it, as demonstrated by the following diagram:

This means that our...