Simple resource group module.

main.tf

module "rgs" {
  source              = "./modules/resource_group"
  names                = ["rg-0","rg-1","rg-2"]
  azure_location      = "eastus"
}

resource_group_module.tf

variable "names" {
  description = "List of resource groups to create"
  type = "list"
}

variable "azure_location" {
  description = "Location in which to deploy resources"
}

resource "azurerm_resource_group" "rg" {
  count    = "${length(var.names)}"
  name     = "${var.names[count.index]}"
  location = "${var.azure_location}"
}