Chapter 17 - Local Values

Use some local values in order to define your infrastructure in one file. Use the DRY principle. Local values assist with repetition Don't overuse these as it makes the code hard to read by future maintainers

locals {
  # Shorten the names for more readability
  rg_name = "${var.business_unit}-${var.environment}-${var.resoure_group_name}"
  vnet_name = "${var.business_unit}-${var.environment}-${var.virtual_network_name}"

  # Common tags to be assigned to all resources
  service_name = "MyServiceName"
  common_tags = {
    Service = local.service_name
    Owner   = local.owner
  }

# Fixes this:
resource "azurerm_resource_group" "myrg" {
  #name = "${var.business_unit}-${var.environment}-${var.resoure_group_name}"
  name = local.rg_name
  location = var.resoure_group_location
  tags = local.common_tags
}