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

Building a new ECS container instance AMI


To test our life cycle management solution, we need to have a mechanism to force your ECS container instances to be terminated. Although you could simply adjust the desired count of your Auto Scaling group (which actually is a common scenario when your Auto Scaling groups are scaling down), another common scenario where this can happen is when you need to update your ECS container instances by introducing a newly built Amazon Machine Image (AMI), complete with the latest operating system and security patches, and up-to-date versions of Docker Engine and the ECS agent. At the very least, if you are building a custom ECS container instance AMI using an approach similar to what you learned in Chapter 6, you should be rebuilding your AMI each time Amazon releases a new version of the base ECS-optimized AMI, and it is common practice to update your AMIs on a weekly or monthly basis.

To simulate introducing a new AMI into your ECS cluster, you can simply...