The count parameter you saw earlier lets you do a basic loop. If you’re clever, you can use the same mechanism to do a basic conditional. Let’s begin by looking at if-statements in the next section and then move on to if-else-statements in the section thereafter.

If-Statements with the count parameter. In How to create reusable infrastructure with Terraform modules, you created a Terraform module that could be used as a “blueprint” for deploying web server clusters. The module created an Auto Scaling Group (ASG), Application Load Balancer (ALB), security groups, and a number of other resources. One thing the module did not create was the scheduled action. Because you want to scale the cluster out only in production, you defined the aws_autoscaling_schedule resources directly in the production configurations under live/prod/services/webserver-cluster/main.tf. Is there a way you could define the aws_autoscaling_schedule resources in the webserver-cluster module and conditionally create them for some users of the module and not create them for others?