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

Creating EC2 Auto Scaling life cycle hooks


To fix the problem of EC2 instance termination affecting our ECS services, we now need to create an EC2 Auto Scaling life cycle hook that will notify us that an EC2 instance is about to be terminated. Referring back to the first diagram, this requires several resources:

  • The actual life cycle hook
  • A life cycle hook role that grants the EC2 Auto Scaling group permission to publish life cycle hook notifications to an SNS topic
  • An SNS topic where life cycle hooks can be published and subscribed to

The following example demonstrates creating the life cycle hook, life cycle hook role, and SNS topic:

...
...
Resources:
  ...
  ...
  LifecycleHook:
    Type: AWS::AutoScaling::LifecycleHook
    Properties:
      RoleARN: !Sub ${LifecycleHookRole.Arn}
      AutoScalingGroupName: !Ref ApplicationAutoscaling
      DefaultResult: CONTINUE
      HeartbeatTimeout: 900
      LifecycleTransition: autoscaling:EC2_INSTANCE_TERMINATING
      NotificationTargetARN: !Ref...