azurerm_function_app - support for pre_warmed_instance_count

azurerm/internal/services/web/resource_arm_function_app.go

@@ -251,6 +251,11 @@ func resourceArmFunctionApp() *schema.Resource {
 								string(web.FtpsOnly),
 							}, false),
 						},
+						"pre_warmed_instance_count": {
+							Type:         schema.TypeInt,
+							Optional:     true,
+							ValidateFunc: validation.IntBetween(0, 10),
+						},
 						"cors": azure.SchemaWebCorsSettings(),
 					},
 				},
@@ -788,6 +793,8 @@ func expandFunctionAppSiteConfig(d *schema.ResourceData) (web.SiteConfig, error)
 		siteConfig.FtpsState = web.FtpsState(v.(string))
 	}
 
+	siteConfig.PreWarmedInstanceCount = utils.Int32(int32(config["pre_warmed_instance_count"].(int)))
+
 	return siteConfig, nil
 }
 
@@ -820,6 +827,10 @@ func flattenFunctionAppSiteConfig(input *web.SiteConfig) []interface{} {
 		result["http2_enabled"] = *input.HTTP20Enabled
 	}
 
+	if input.PreWarmedInstanceCount != nil {
+		result["pre_warmed_instance_count"] = *input.PreWarmedInstanceCount
+	}
+
 	result["ip_restriction"] = flattenFunctionAppIpRestriction(input.IPSecurityRestrictions)
 
 	result["min_tls_version"] = string(input.MinTLSVersion)

azurerm/internal/services/web/tests/resource_arm_function_app_test.go

@@ -667,6 +667,26 @@ func TestAccAzureRMFunctionApp_ftpsState(t *testing.T) {
 	})
 }
 
+func TestAccAzureRMFunctionApp_preWarmedInstanceCount(t *testing.T) {
+	data := acceptance.BuildTestData(t, "azurerm_function_app", "test")
+
+	resource.ParallelTest(t, resource.TestCase{
+		PreCheck:     func() { acceptance.PreCheck(t) },
+		Providers:    acceptance.SupportedProviders,
+		CheckDestroy: testCheckAzureRMFunctionAppDestroy,
+		Steps: []resource.TestStep{
+			{
+				Config: testAccAzureRMFunctionApp_preWarmedInstanceCount(data),
+				Check: resource.ComposeTestCheckFunc(
+					testCheckAzureRMFunctionAppExists(data.ResourceName),
+					resource.TestCheckResourceAttr(data.ResourceName, "site_config.0.pre_warmed_instance_count", "1"),
+				),
+			},
+			data.ImportStep(),
+		},
+	})
+}
+
 func TestAccAzureRMFunctionApp_oneIpRestriction(t *testing.T) {
 	data := acceptance.BuildTestData(t, "azurerm_function_app", "test")
 
@@ -2066,6 +2086,51 @@ resource "azurerm_function_app" "test" {
 `, data.RandomInteger, data.Locations.Primary, data.RandomString, data.RandomInteger, data.RandomInteger)
 }
 
+func testAccAzureRMFunctionApp_preWarmedInstanceCount(data acceptance.TestData) string {
+	return fmt.Sprintf(`
+provider "azurerm" {
+  features {}
+}
+
+resource "azurerm_resource_group" "test" {
+  name     = "acctestRG-%d"
+  location = "%s"
+}
+
+resource "azurerm_storage_account" "test" {
+  name                     = "acctestsa%s"
+  resource_group_name      = azurerm_resource_group.test.name
+  location                 = azurerm_resource_group.test.location
+  account_tier             = "Standard"
+  account_replication_type = "LRS"
+}
+
+resource "azurerm_app_service_plan" "test" {
+  name                = "acctestASP-%d"
+  resource_group_name = azurerm_resource_group.test.name
+  location            = azurerm_resource_group.test.location
+  kind                = "elastic"
+
+  sku {
+    tier = "ElasticPremium"
+    size = "EP1"
+  }
+}
+
+resource "azurerm_function_app" "test" {
+  name                      = "acctest-%d-func"
+  location                  = azurerm_resource_group.test.location
+  resource_group_name       = azurerm_resource_group.test.name
+  app_service_plan_id       = azurerm_app_service_plan.test.id
+  storage_connection_string = azurerm_storage_account.test.primary_connection_string
+
+  site_config {
+    pre_warmed_instance_count = 1
+  }
+}
+`, data.RandomInteger, data.Locations.Primary, data.RandomString, data.RandomInteger, data.RandomInteger)
+}
+
 func testAccAzureRMFunctionApp_oneIpRestriction(data acceptance.TestData) string {
 	return fmt.Sprintf(`
 provider "azurerm" {

website/docs/r/function_app.html.markdown

@@ -157,6 +157,8 @@ The following arguments are supported:
 
 * `ftps_state` - (Optional) State of FTP / FTPS service for this function app. Possible values include: `AllAllowed`, `FtpsOnly` and `Disabled`.
 
+* `pre_warmed_instance_count` - (Optional) The number of pre-warmed instances for this function app. Only affects apps on the Premium plan.
+
 * `cors` - (Optional) A `cors` block as defined below.
 
 * `ip_restriction` - (Optional) A [List of objects](/docs/configuration/attr-as-blocks.html) representing ip restrictions as defined below.