使用 Terrafrom 的同一 VNet 中的多个子网

Question

I'm completely new to terraform and I'm trying to learn and write a TF code to automate Azure VM deployment. I'm trying to cover each parts as modules (except rg) rather than keeping it in a single main.tf file. My intention is to create 1 vnet (TESTVNET) and create multiple subnets in same Vnet, where I can define the subnet name and address in my tfvars file.

    resource "azurerm_resource_group" "resource_group" {
      name     = var.RGname
      location = var.RGlocation
    }
    
    module "VNET" {
      source              = "./Modules/NetworkConfig"
      name                = var.VNETname
      address_space       = var.address_space
      location            = var.RGlocation
      resource_group_name = azurerm_resource_group.resource_group.name
    }
    
    module "SUBNETS" {
      source               = "./Modules/SubnetConfig"
      Subnetlist = var.Subnetlist
      virtual_network_name = module.VNET.vnet_name
      resource_group_name  = azurerm_resource_group.resource_group.name
      depends_on           = [azurerm_resource_group.resource_group, module.VNET.vnet]
    
    }

Variables.tf (of main)

    variable "RGlocation" {
    }
    
    variable "RGname" {
    }
    
    variable "VNETname" {
    }
    
    variable "address_space" {
    }
    
    variable "Subnetlist" {
      type = map(object({
        name    = list(string)
        address = list(string)
    }))
    }

Answer 1

The way you iterate over Subnetlist<\/code> is incorrect - you only get the value of "list" key, ending up with a bundle of subnets instead of individual items. Make it a map of individual subnet objects instead:

variable "Subnetlist" {
  type = map(object({
    name    = string
    address = string
  }))
}