How to use selective zone(s) while deploying azure vm through terraform

Question

I am using the below while deploying a virtual machine to specific zone in region eastus

resource "azurerm_linux_virtual_machine" "vm" {

  .........
  .........
  zones = [1]
}

but terraform validate says An argument named "zones" is not expected here. Did you mean "zone"?

Answer 1

You should prefer for_each and set to count and index. you can use this transformer code to create a virtual Machine in 3 Availability Zone. You can set the number of Zones according to your needs

provider "azurerm" {
  features {}
}

data "azurerm_resource_group" "example" {
  name     = "XXXXXXXXX"
  
}


resource "azurerm_virtual_network" "example" {
  name                = "example-network"
  address_space       = ["10.0.0.0/16"]
  location            = data.azurerm_resource_group.example.location
  resource_group_name = data.azurerm_resource_group.example.name
}

resource "azurerm_subnet" "example" {
  name                 = "internal"
  resource_group_name  = data.azurerm_resource_group.example.name
  virtual_network_name = azurerm_virtual_network.example.name
  address_prefixes     = ["10.0.2.0/24"]
}

resource "azurerm_network_interface" "example" {
  #count=3
  name                = "example-nic"
  location            = data.azurerm_resource_group.example.location
  resource_group_name = data.azurerm_resource_group.example.name

  ip_configuration {
    name                          = "internal"
    subnet_id                     = azurerm_subnet.example.id
    private_ip_address_allocation = "Dynamic"
  }
}

resource "azurerm_linux_virtual_machine" "example" {
  #count=3
  name                = "example-machine"
  resource_group_name = data.azurerm_resource_group.example.name
  location            = data.azurerm_resource_group.example.location
  size                = "Standard_F2"
  for_each = local.zones
  zone = each.value
  admin_username      = "adminuser"
  network_interface_ids = [
    azurerm_network_interface.example.id,

  ]
  
  admin_ssh_key {
    username   = "adminuser"
    public_key = file("~/.ssh/id_rsa.pub")
  }

  os_disk {
    caching              = "ReadWrite"
    storage_account_type = "Standard_LRS"
  }

  source_image_reference {
    publisher = "Canonical"
    offer     = "UbuntuServer"
    sku       = "16.04-LTS"
    version   = "latest"
  }
}

locals {
  zones = toset(["1","2","3"])
}