Configure Azure Virtual Desktop Network Settings with Terraform
Article tested with the following Terraform and Terraform provider versions:
Terraform enables the definition, preview, and deployment of cloud infrastructure. Using Terraform, you create configuration files using HCL syntax. The HCL syntax allows you to specify the cloud provider - such as Azure - and the elements that make up your cloud infrastructure. After you create your configuration files, you create an execution plan that allows you to preview your infrastructure changes before they're deployed. Once you verify the changes, you apply the execution plan to deploy the infrastructure.
This article provides an overview of how to use Terraform to configure the network settings for Azure Virtual Desktop.
In this article, you learn how to:
- Use Terraform to create a virtual network
- Use Terraform to create a subnet
- Use Terraform to create an NSG
- Peering the Azure Virtual Desktop vnet with hub vnet
1. Configure your environment
- Azure subscription: If you don't have an Azure subscription, create a free account before you begin.
Configure Terraform: If you haven't already done so, configure Terraform using one of the following options:
2. Implement the Terraform code
Create a directory in which to test the sample Terraform code and make it the current directory.
Create a file named
providers.tf
and insert the following code:terraform { required_providers { azurerm = { source = "hashicorp/azurerm" version = "~>2.0" } azuread = { source = "hashicorp/azuread" } } } provider "azurerm" { features {} }
Create a file named
main.tf
and insert the following code:resource "azurerm_virtual_network" "vnet" { name = "${var.prefix}-VNet" address_space = var.vnet_range dns_servers = var.dns_servers location = var.deploy_location resource_group_name = var.rg_name depends_on = [azurerm_resource_group.rg] } resource "azurerm_subnet" "subnet" { name = "default" resource_group_name = var.rg_name virtual_network_name = azurerm_virtual_network.vnet.name address_prefixes = var.subnet_range depends_on = [azurerm_resource_group.rg] } resource "azurerm_network_security_group" "nsg" { name = "${var.prefix}-NSG" location = var.deploy_location resource_group_name = var.rg_name security_rule { name = "HTTPS" priority = 1001 direction = "Inbound" access = "Allow" protocol = "Tcp" source_port_range = "*" destination_port_range = "443" source_address_prefix = "*" destination_address_prefix = "*" } depends_on = [azurerm_resource_group.rg] } resource "azurerm_subnet_network_security_group_association" "nsg_assoc" { subnet_id = azurerm_subnet.subnet.id network_security_group_id = azurerm_network_security_group.nsg.id } data "azurerm_virtual_network" "ad_vnet_data" { name = var.ad_vnet resource_group_name = var.ad_rg } resource "azurerm_virtual_network_peering" "peer1" { name = "peer_avdspoke_ad" resource_group_name = var.rg_name virtual_network_name = azurerm_virtual_network.vnet.name remote_virtual_network_id = data.azurerm_virtual_network.ad_vnet_data.id } resource "azurerm_virtual_network_peering" "peer2" { name = "peer_ad_avdspoke" resource_group_name = var.ad_rg virtual_network_name = var.ad_vnet remote_virtual_network_id = azurerm_virtual_network.vnet.id }
Create a file named
variables.tf
and insert the following code:
variable "resource_group_location" {
default = "eastus"
description = "Location of the resource group."
}
variable "rg_name" {
type = string
default = "rg-avd-resources"
description = "Name of the Resource group in which to deploy service objects"
}
variable "rg_shared_name" {
type = string
default = "rg-shared-resources"
description = "Name of the Resource group in which to deploy shared resources"
}
variable "deploy_location" {
type = string
default = "eastus"
description = "The Azure Region in which all resources in this example should be created."
}
variable "ad_vnet" {
type = string
default = "infra-network"
description = "Name of domain controller vnet"
}
variable "dns_servers" {
type = list(string)
default = ["10.0.1.4", "168.63.129.16"]
description = "Custom DNS configuration"
}
variable "vnet_range" {
type = list(string)
default = ["10.2.0.0/16"]
description = "Address range for deployment VNet"
}
variable "subnet_range" {
type = list(string)
default = ["10.2.0.0/24"]
description = "Address range for session host subnet"
}
variable "prefix" {
type = string
default = "avdtf"
description = "Prefix of the name of the AVD machine(s)"
}
- Create a file named
output.tf
and insert the following code:
output "location" {
description = "The Azure region"
value = azurerm_resource_group.rg.location
}
output "dnsservers" {
description = "Custom DNS configuration"
value = azurerm_virtual_network.vnet.dns_servers
}
output "vnetrange" {
description = "Address range for deployment vnet"
value = azurerm_virtual_network.vnet.address_space
}
3. Initialize Terraform
Run terraform init to initialize the Terraform deployment. This command downloads the Azure provider required to manage your Azure resources.
terraform init -upgrade
Key points:
- The
-upgrade
parameter upgrades the necessary provider plugins to the newest version that complies with the configuration's version constraints.
4. Create a Terraform execution plan
Run terraform plan to create an execution plan.
terraform plan -out main.tfplan
Key points:
- The
terraform plan
command creates an execution plan, but doesn't execute it. Instead, it determines what actions are necessary to create the configuration specified in your configuration files. This pattern allows you to verify whether the execution plan matches your expectations before making any changes to actual resources. - The optional
-out
parameter allows you to specify an output file for the plan. Using the-out
parameter ensures that the plan you reviewed is exactly what is applied.
5. Apply a Terraform execution plan
Run terraform apply to apply the execution plan to your cloud infrastructure.
terraform apply main.tfplan
Key points:
- The example
terraform apply
command assumes you previously ranterraform plan -out main.tfplan
. - If you specified a different filename for the
-out
parameter, use that same filename in the call toterraform apply
. - If you didn't use the
-out
parameter, callterraform apply
without any parameters.
6. Verify the results
- On the Azure portal, Select Azure Virtual Desktop.
- Select Host pools and then the Name of the pool created resource.
- Select Session hosts and then verify the session host is listed.
7. Clean up resources
When you no longer need the resources created via Terraform, do the following steps:
Run terraform plan and specify the
destroy
flag.terraform plan -destroy -out main.destroy.tfplan
Key points:
- The
terraform plan
command creates an execution plan, but doesn't execute it. Instead, it determines what actions are necessary to create the configuration specified in your configuration files. This pattern allows you to verify whether the execution plan matches your expectations before making any changes to actual resources. - The optional
-out
parameter allows you to specify an output file for the plan. Using the-out
parameter ensures that the plan you reviewed is exactly what is applied.
- The
Run terraform apply to apply the execution plan.
terraform apply main.destroy.tfplan
Troubleshoot Terraform on Azure
Troubleshoot common problems when using Terraform on Azure
Next steps
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