When using an ECS cluster with EC2 instances, what maintenance tasks should you perform on the EC2s?
You should not directly manipulate the EC2 instances created by ECS. AWS will automatically update these instances.
The instances created by ECS do not have patches that need to be applied; however, you should make sure your containers contain any important security updates.
Refresh the cluster with instances built from the latest ECS AMI.
ECS clusters do not use EC2 instances.