Terraform on Azure - Deploy multiple subnet

Question

I'm trying to implement a Terraform script to create multiple subnets.

resource "azurerm_subnet" "test_subnet" {
    name = "testSUBNET"
    resource_group_name = "${local.resource_group_name}"
    virtual_network_name = "${azurerm_virtual_network.lab_vnet.name}"
    address_prefix = "10.0.1.0/24"
}

Is there a way to do a for-each or a loop on a variable in order to create them at the same time?

Answer 1

You can achieve this using a variable and count index as follows:

variable "subnet_prefix" {
  type = "list"
  default = [
    {
      ip      = "10.0.1.0/24"
      name     = "subnet-1"
    },
    {
      ip      = "10.0.2.0/24"
      name     = "subnet-2"
    }
   ]
}

resource "azurerm_subnet" "test_subnet" {
    name = "${lookup(element(var.subnet_prefix, count.index), "name")}"
    count = "${length(var.subnet_prefix)}"
    resource_group_name = "${local.resource_group_name}"
    virtual_network_name = "${azurerm_virtual_network.lab_vnet.name}"
    address_prefix = "${lookup(element(var.subnet_prefix, count.index), "ip")}"
}

There is also preview feature available for-each in the new version