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

Configuring Auto Scaling group creation policies


In the previous section, you configured a user data script and CloudFormation Init metadata so that your ECS container instances can perform first time initialization and configuration appropriate to the given target environment. Although each instance will signal CloudFormation of success or failure of the CloudFormation Init process, you need to configure CloudFormation explicitlyto wait for each instance in the Auto Scaling group to signal success, which is important if you want to ensure you don't attempt to try and deploy ECS services to your ECS clusters before they have registered with the ECS cluster or if they fail for some reason.

 

CloudFormation includes a feature referred to as creation policies, which allow you to specify optional creation success criteria when creating EC2 Auto Scaling groups and EC2 instances. When a creation policy is attached to an EC2 Auto Scaling group, CloudFormation will wait for a configurable number of...