Book Image

Docker on Amazon Web Services

By : Justin Menga
Book Image

Docker on Amazon Web Services

By: Justin Menga

Overview of this book

Over the last few years, Docker has been the gold standard for building and distributing container applications. Amazon Web Services (AWS) is a leader in public cloud computing, and was the first to offer a managed container platform in the form of the Elastic Container Service (ECS). Docker on Amazon Web Services starts with the basics of containers, Docker, and AWS, before teaching you how to install Docker on your local machine and establish access to your AWS account. You'll then dig deeper into the ECS, a native container management platform provided by AWS that simplifies management and operation of your Docker clusters and applications for no additional cost. Once you have got to grips with the basics, you'll solve key operational challenges, including secrets management and auto-scaling your infrastructure and applications. You'll explore alternative strategies for deploying and running your Docker applications on AWS, including Fargate and ECS Service Discovery, Elastic Beanstalk, Docker Swarm and Elastic Kubernetes Service (EKS). In addition to this, there will be a strong focus on adopting an Infrastructure as Code (IaC) approach using AWS CloudFormation. By the end of this book, you'll not only understand how to run Docker on AWS, but also be able to build real-world, secure, and scalable container platforms in the cloud.
Table of Contents (26 chapters)
Title Page
Copyright and Credits
Dedication
Packt Upsell
Contributors
Preface
Index

Implementing an ECS Auto Scaling solution


Now that you have a good understanding of how to calculate the ECS cluster capacity for the purposes of making scale-out and scale-in decisions, we are ready to implement an auto scaling solution, as illustrated in the following diagram:

The following provides a walkthrough of the solution shown in the preceding diagram:

  1. Before you calculate the ECS cluster capacity, you need a mechanism that will trigger calculations of capacity, ideally whenever the capacity of your ECS container instances changes. This can be achieved by leveraging the CloudWatch Events service, which publishes events for various AWS services including ECS, and allows you to create event rules that subscribe to specific events and process them using a variety of mechanisms, including a Lambda function. CloudWatch events support receiving information about ECS container-instance state changes, and this represents the ideal mechanism for triggering cluster capacity calculations, as...