Sample CloudFormation template to create On-Demand EC2 Fleet using LaunchTemplate and CloudFormation AWSTemplateFormatVersion: '2010-09-09' Description: Template to Create OnDemand EC2 Fleet using LaunchTemplate Parameters: ImageId: Type: String Description: 'Amazon Linux 2 AMI (HVM), SSD Volume Type in us-east-1a region' Default: 'ami-0c2b8ca1dad447f8a' SecurityGroupId: Type: String