Instance that will be created

The format of the instance name to be created is as follows:

"First 2 characters of the stack name" + "-" + "Last 11 characters of the resource name of the AutoScalingGroup" + "-" + "Random ID (12 characters)" + "-" + "Random ID (12 characters)" + "-" + "Random ID (12 characters)"

Example: au-aling_group-knu4eeueo2c5-cyrtttd6lwbu-xsge7xcbkxum

The instance name is set as the host name with the hyphen (-) converted into an underscore (_).