Question

Your team has a reusable local module at ./modules/app-server that provisions a single application server. A colleague needs to deploy three identical instances of this server from the root configuration without copying the module block three times. Which approach correctly creates three instances of the module?

Accepted Answer

Add a single module block with the count = 3 meta-argument, then reference instances as module.app_server[0], module.app_server[1], etc.

Answer

Set a replicas = 3 argument inside the module's variables.tf so Terraform loops internally.

Answer

Declare the module three times with identical source values but different names in a single file.

Answer

Use the terraform apply -parallelism=3 flag to instruct Terraform to create three copies of the module.