Configure Azure Compute Gallery with Terraform
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 shows you how to configure Azure Compute Gallery.
In this article, you learn how to:
- Use Terraform to configure Azure Compute Gallery (formerly Shared Image Gallery)
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_resource_group" "sigrg" { location = var.deploy_location name = var.rg_shared_name } # generate a random string (consisting of four characters) # https://registry.terraform.io/providers/hashicorp/random/latest/docs/resources/string resource "random_string" "rando" { length = 4 upper = false special = false } # Creates Shared Image Gallery # https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/resources/shared_image_gallery resource "azurerm_shared_image_gallery" "sig" { name = "sig${random_string.random.id}" resource_group_name = azurerm_resource_group.sigrg.name location = azurerm_resource_group.sigrg.location description = "Shared images" tags = { Environment = "Demo" Tech = "Terraform" } } #Creates image definition # https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/resources/shared_image resource "azurerm_shared_image" "example" { name = "avd-image" gallery_name = azurerm_shared_image_gallery.sig.name resource_group_name = azurerm_resource_group.sigrg.name location = azurerm_resource_group.sigrg.location os_type = "Windows" identifier { publisher = "MicrosoftWindowsDesktop" offer = "office-365" sku = "20h2-evd-o365pp" } }
Create a file named
variables.tf
and insert the following code:
variable "deploy_location" {
type = string
default = "eastus"
description = "The Azure Region in which all resources in this example should be created."
}
variable "rg_shared_name" {
type = string
default = "rg-shared-resources"
description = "Name of the Resource group in which to deploy shared resources"
}
- Create a file named
output.tf
and insert the following code:
output "location" {
description = "The Azure region"
value = azurerm_resource_group.sigrg.location
}
output "Compute_Gallery" {
description = "Azure Compute Gallery"
value = azurerm_shared_image_gallery.sig.name
}
3. 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.
4. 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.
5. 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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