AWS EC2 instance name is hyphenated - terraform

Question

I am using the following terraform to create windows EC2 instance. The instance is launched successfully, but in AWS console I see hyphenated name for EC2 instance.
For brevity purpose I have removed some TF code
resource "aws_launch_template" "server_launch_template" {
name = "my-launch-template"
image_id = "my-windows-ami-id"
instance_type = "t3.medium"
key_name = "my-keypair"
vpc_security_group_ids = [var.security_group_id]
iam_instance_profile {
arn = aws_iam_instance_profile.my_instance.arn
}
tag_specifications {
resource_type = "instance"
tags = module.tags.mytags
}
lifecycle {
create_before_destroy = true
}
}
resource "aws_autoscaling_group" "server_autoscaling_group" {
name = "my autoscaling group"
max_size = 1
min_size = 1
desired_capacity = 1
vpc_zone_identifier = [var.subnet_id]
wait_for_capacity_timeout = var.wait_for_capacity
health_check_type = "EC2"
dynamic "tag" {
#some code here
}
launch_template {
id = aws_launch_template.server_launch_template.id
version = "$Latest"
}
lifecycle {
create_before_destroy = true
}
}
How and where do I specify instance name in the launch template?

Answer 1

You can't define dynamic names for instances launched by an autoscaling group.
You can however configure a lambda function to run whenever the autoscaling launches new instances, and you can name the instances from the lambda.

Answer 2

This works. As #MarkoE suggested added Name tag in tag_specifications
resource "aws_launch_template" "server_launch_template" {
name = "my-launch-template"
image_id = "my-windows-ami-id"
instance_type = "t3.medium"
key_name = "my-keypair"
vpc_security_group_ids = [var.security_group_id]
iam_instance_profile {
arn = aws_iam_instance_profile.my_instance.arn
}
tag_specifications {
resource_type = "instance"
tags = merge(module.tags.mytags, { Name = "my-runner-instance" })
}
lifecycle {
create_before_destroy = true
}
}