如何避免在Terraform中重复变量?

Terraform不允许在变量文件中插入变量,否则会出现错误:

错误:不允许使用变量

关于变量。tf第9行,变量“resource_group_name”中:9:
default=“${var.prefix}-terraform-dev_rg”

这里不能使用变量。

这意味着我最终会复制我的 变量。tf 当我尝试创建资源组的名称时。

有没有避免重复变量值的好方法?

变量。tf

variable "prefix" {
  description = "The prefix used for all resources in this plan"
  default     = "terraform-dev"
}

variable resource_group_name {
  type = "string"
  default = "terraform-dev_rg"
}

variable resource_group_location {
  type = "string"
  default = "eastus"
}

主要的tf

# Configure the Microsoft Azure Provider
provider "azurerm" {
  version         = "=1.28.0"
}

# Create a resource group
resource "azurerm_resource_group" "resource-group" {
  name     = var.resource_group_name
  location = var.resource_group_location
}

#Create an application gateway with web app firewall
module "firewall" {
  source                  = "./firewall"
  resource_group_name     = var.resource_group_name
  resource_group_location = var.resource_group_location
}

/防火墙/变量。tf

#Passed down from the root variables.tf
variable "prefix" {}
variable "resource_group_name" {}
variable "resource_group_location" {}

/防火墙/主。tf

# Create a virtual network for the firewall
resource "azurerm_virtual_network" "firewall-vnet" {
  name = "${var.prefix}-waf-vnet"
  address_space = ["10.0.0.0/16"]
  resource_group_name = var.resource_group_name
  location            = var.resource_group_location
}