Support for number_of_workers in app_service

azurerm/internal/services/web/app_service.go

@@ -455,6 +455,13 @@ func schemaAppServiceSiteConfig() *schema.Schema {
 					Optional: true,
 				},
 
+				"number_of_workers": {
+					Type:         schema.TypeInt,
+					Optional:     true,
+					ValidateFunc: validation.IntBetween(1, 100),
+					Computed:     true,
+				},
+
 				"linux_fx_version": {
 					Type:     schema.TypeString,
 					Optional: true,
@@ -774,6 +781,11 @@ func schemaAppServiceDataSourceSiteConfig() *schema.Schema {
 					Computed: true,
 				},
 
+				"number_of_workers": {
+					Type:     schema.TypeInt,
+					Computed: true,
+				},
+
 				"linux_fx_version": {
 					Type:     schema.TypeString,
 					Computed: true,
@@ -1637,6 +1649,10 @@ func expandAppServiceSiteConfig(input interface{}) (*web.SiteConfig, error) {
 		siteConfig.HealthCheckPath = utils.String(v.(string))
 	}
 
+	if v, ok := config["number_of_workers"]; ok && v.(int) != 0 {
+		siteConfig.NumberOfWorkers = utils.Int32(int32(v.(int)))
+	}
+
 	if v, ok := config["min_tls_version"]; ok {
 		siteConfig.MinTLSVersion = web.SupportedTLSVersions(v.(string))
 	}
@@ -1750,6 +1766,10 @@ func flattenAppServiceSiteConfig(input *web.SiteConfig) []interface{} {
 		result["health_check_path"] = *input.HealthCheckPath
 	}
 
+	if input.NumberOfWorkers != nil {
+		result["number_of_workers"] = *input.NumberOfWorkers
+	}
+
 	result["min_tls_version"] = string(input.MinTLSVersion)
 
 	result["cors"] = FlattenWebCorsSettings(input.Cors)

azurerm/internal/services/web/app_service_resource_test.go

@@ -1368,6 +1368,22 @@ func TestAccAppService_healthCheckPath(t *testing.T) {
 	})
 }
 
+func TestAccAppService_numberOfWorkers(t *testing.T) {
+	data := acceptance.BuildTestData(t, "azurerm_app_service", "test")
+	r := AppServiceResource{}
+
+	data.ResourceTest(t, r, []resource.TestStep{
+		{
+			Config: r.numberOfWorkers(data),
+			Check: resource.ComposeTestCheckFunc(
+				check.That(data.ResourceName).ExistsInAzure(r),
+				check.That(data.ResourceName).Key("site_config.0.number_of_workers").HasValue("1"),
+			),
+		},
+		data.ImportStep(),
+	})
+}
+
 // Note: to specify `linux_fx_version` the App Service Plan must be of `kind = "Linux"`, and `reserved = true`
 func TestAccAppService_linuxFxVersion(t *testing.T) {
 	data := acceptance.BuildTestData(t, "azurerm_app_service", "test")
@@ -4074,6 +4090,42 @@ resource "azurerm_app_service" "test" {
 `, data.RandomInteger, data.Locations.Primary, data.RandomInteger, data.RandomInteger)
 }
 
+func (r AppServiceResource) numberOfWorkers(data acceptance.TestData) string {
+	return fmt.Sprintf(`
+provider "azurerm" {
+  features {}
+}
+
+resource "azurerm_resource_group" "test" {
+  name     = "acctestRG-%d"
+  location = "%s"
+}
+
+resource "azurerm_app_service_plan" "test" {
+  name                = "acctestASP-%d"
+  location            = azurerm_resource_group.test.location
+  resource_group_name = azurerm_resource_group.test.name
+  per_site_scaling    = true
+
+  sku {
+    tier = "Standard"
+    size = "S1"
+  }
+}
+
+resource "azurerm_app_service" "test" {
+  name                = "acctestAS-%d"
+  location            = azurerm_resource_group.test.location
+  resource_group_name = azurerm_resource_group.test.name
+  app_service_plan_id = azurerm_app_service_plan.test.id
+
+  site_config {
+    number_of_workers = 1
+  }
+}
+`, data.RandomInteger, data.Locations.Primary, data.RandomInteger, data.RandomInteger)
+}
+
 func (r AppServiceResource) linuxFxVersion(data acceptance.TestData) string {
 	return fmt.Sprintf(`
 provider "azurerm" {

website/docs/d/app_service.html.markdown

@@ -136,6 +136,8 @@ A `site_config` block exports the following:
 
 * `health_check_path` - The health check path to be pinged by App Service.
 
+* `number_of_workers` - The scaled number of workers (for per site scaling) of this App Service.
+
 * `ip_restriction` - One or more `ip_restriction` blocks as defined above.
 
 * `scm_use_main_ip_restriction` - IP security restrictions for scm to use main.  

website/docs/r/app_service.html.markdown

@@ -193,9 +193,9 @@ A `site_config` block supports the following:
 
 * `ftps_state` - (Optional) State of FTP / FTPS service for this App Service. Possible values include: `AllAllowed`, `FtpsOnly` and `Disabled`.
 
-* `health_check_path` - (Optional) The health check path to be pinged by App Service. [For more information - please see the corresponding Kudu Wiki page](https://github.com/projectkudu/kudu/wiki/Health-Check-(Preview)).
+* `health_check_path` - (Optional) The health check path to be pinged by App Service. [For more information - please see App Service health check announcement](https://azure.github.io/AppService/2020/08/24/healthcheck-on-app-service.html).
 
-~> **Note:** This functionality is in Preview and is subject to changes (including breaking changes) on Azure's end
+* `number_of_workers` - (Optional) The scaled number of workers (for per site scaling) of this App Service. Requires that `per_site_scaling` is enabled on the `azurerm_app_service_plan`. [For more information - please see Microsoft documentation on high-density hosting](https://docs.microsoft.com/en-us/azure/app-service/manage-scale-per-app).
 
 * `http2_enabled` - (Optional) Is HTTP2 Enabled on this App Service? Defaults to `false`.