AWS cloudformation dry run mode, review changes before applying them

What:

AWS Cloudformation

Problem:

You're making some changes to your cloudformation template, but before you apply it you would like to know what will be changed, what will be restarted or terminated.

AWS re-attach EBS volume on instance creation

What:

Amazon Web Services - EC2, ECS, EBS

Problem:

You have some data on EBS volume which you don't want to destroy when instance is terminated.

AWS ECS run task on a specific EC2 container instance

What:

Amazon Web Services - EC2, ECS

Problem:

You want to run task on a specific ECS (docker host) instance.