Resources created by azurerm_resource_group_template_deployment are not detecting differences

[ajklotz]

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Terraform (and AzureRM Provider) Version

Terraform v0.14.7
+ provider registry.terraform.io/hashicorp/azurerm v2.44.0

Affected Resource(s)

• azurerm_resource_group_template_deployment
  In this scenario, it is "type": "Microsoft.Web/sites/config" and "type": "Microsoft.Web/sites/slots/config"

Terraform Configuration Files

resource "azurerm_resource_group_template_deployment" "api_virtual_directory" {
  name                = "api_virtual_directory"
  resource_group_name = azurerm_resource_group.digital.name
  deployment_mode     = "Incremental"
  template_content    = <<TEMPLATE
{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "webAppName": {
        "type": "String",
        "defaultValue": "${module.webapp["api"].name}"
    },
    "virtualApplications":{
      "type": "Array",
      "defaultValue":[
        {
        "virtualPath": "/",
        "physicalPath": "site\\wwwroot",
        "preloadEnabled": false,
        "virtualDirectories": null
        },
        {
        "virtualPath": "/app1",
        "physicalPath": "site\\wwwroot\\app1",
        "preloadEnabled": false,
        "virtualDirectories": null
        },
        {
        "virtualPath": "/app2",
        "physicalPath": "site\\wwwroot\\app2",
        "preloadEnabled": false,
        "virtualDirectories": null
        }
      ]
    }
  },
  "resources": [
    {
      "type": "Microsoft.Web/sites/config",
      "name": "[concat(parameters('webAppName'), '/web')]",
      "apiVersion": "2020-06-01",
      "properties": {
          "virtualApplications": "[parameters('virtualApplications')]"
      }
    }
  ]
}
TEMPLATE
  depends_on          = [module.webapp["api"]]
}

Debug Output

Panic Output

Expected Behaviour

Terraform should detect that the site config has drifted, and should apply those virtual directories

Actual Behaviour

Virtual directories are not created for the web app

Steps to Reproduce

1. Have terraform configuration create web app and the virtual directories.
2. Delete the web app from Azure Portal
3. Rerun the terraform apply
4. Terraform creates the web app again, but does not create virtual directories

Important Factoids

References

• #0000