Terraform Best Practices: Do Not Hard Code Values - Use Locals

tfbp_do_not_hard_code-use_locals.tf

variable "location" {
  default     = "eastus"
  description = "Azure deployment region"
  type        = string
}

variable "resource_group_name" {
  default     = "rg-eus-test-myrg"
  description = "Resource Group name for deployment"
  type        = string
}

variable "tags" {
  default     = {
    Environment = "test"
  }
  description = "Supplied Resource Group tags"
  type        = map(string)
}

locals {
  mandatory_tags = {
    CreatedBy = "Terraform"
  }

  tags = merge(var.tags, local.mandatory_tags)
}

resource "azurerm_resource_group" "rg" {
  name     = var.resource_group_name
  location = var.location

  tags = local.tags
}