Support application gateway backend pools for network interface

Both network interface data source and resource now supports
configuration of applicaiton gateway backed pool ids.

azurerm/data_source_network_interface.go

@@ -72,6 +72,13 @@ func dataSourceArmNetworkInterface() *schema.Resource {
 							Computed: true,
 						},
 
+						"application_gateway_backend_address_pools_ids": {
+							Type:     schema.TypeSet,
+							Computed: true,
+							Elem:     &schema.Schema{Type: schema.TypeString},
+							Set:      schema.HashString,
+						},
+
 						"load_balancer_backend_address_pools_ids": {
 							Type:     schema.TypeSet,
 							Computed: true,

azurerm/import_arm_network_interface_test.go

@@ -91,6 +91,27 @@ func TestAccAzureRMNetworkInterface_importMultipleLoadBalancers(t *testing.T) {
 	})
 }
 
+func TestAccAzureRMNetworkInterface_importApplicationGateway(t *testing.T) {
+	resourceName := "azurerm_network_interface.test"
+	rInt := acctest.RandInt()
+
+	resource.Test(t, resource.TestCase{
+		PreCheck:     func() { testAccPreCheck(t) },
+		Providers:    testAccProviders,
+		CheckDestroy: testCheckAzureRMNetworkInterfaceDestroy,
+		Steps: []resource.TestStep{
+			{
+				Config: testAccAzureRMNetworkInterface_applicationGatewayBackendPool(rInt, testLocation()),
+			},
+			{
+				ResourceName:      resourceName,
+				ImportState:       true,
+				ImportStateVerify: true,
+			},
+		},
+	})
+}
+
 func TestAccAzureRMNetworkInterface_importPublicIP(t *testing.T) {
 	resourceName := "azurerm_network_interface.test"
 	rInt := acctest.RandInt()

azurerm/resource_arm_network_interface.go

@@ -88,6 +88,14 @@ func resourceArmNetworkInterface() *schema.Resource {
 							Computed: true,
 						},
 
+						"application_gateway_backend_address_pools_ids": {
+							Type:     schema.TypeSet,
+							Optional: true,
+							Computed: true,
+							Elem:     &schema.Schema{Type: schema.TypeString},
+							Set:      schema.HashString,
+						},
+
 						"load_balancer_backend_address_pools_ids": {
 							Type:     schema.TypeSet,
 							Optional: true,
@@ -471,6 +479,14 @@ func flattenNetworkInterfaceIPConfigurations(ipConfigs *[]network.InterfaceIPCon
 			niIPConfig["primary"] = *props.Primary
 		}
 
+		var poolsAG []interface{}
+		if props.ApplicationGatewayBackendAddressPools != nil {
+			for _, pool := range *props.ApplicationGatewayBackendAddressPools {
+				poolsAG = append(poolsAG, *pool.ID)
+			}
+		}
+		niIPConfig["application_gateway_backend_address_pools_ids"] = schema.NewSet(schema.HashString, poolsAG)
+
 		var pools []interface{}
 		if props.LoadBalancerBackendAddressPools != nil {
 			for _, pool := range *props.LoadBalancerBackendAddressPools {
@@ -551,6 +567,21 @@ func expandAzureRmNetworkInterfaceIpConfigurations(d *schema.ResourceData) ([]ne
 			properties.Primary = &b
 		}
 
+		if v, ok := data["application_gateway_backend_address_pools_ids"]; ok {
+			var ids []network.ApplicationGatewayBackendAddressPool
+			pools := v.(*schema.Set).List()
+			for _, p := range pools {
+				pool_id := p.(string)
+				id := network.ApplicationGatewayBackendAddressPool{
+					ID: &pool_id,
+				}
+
+				ids = append(ids, id)
+			}
+
+			properties.ApplicationGatewayBackendAddressPools = &ids
+		}
+
 		if v, ok := data["load_balancer_backend_address_pools_ids"]; ok {
 			var ids []network.BackendAddressPool
 			pools := v.(*schema.Set).List()

azurerm/resource_arm_network_interface_test.go

@@ -285,6 +285,25 @@ func TestAccAzureRMNetworkInterface_multipleLoadBalancers(t *testing.T) {
 	})
 }
 
+func TestAccAzureRMNetworkInterface_applicationGateway(t *testing.T) {
+	resourceName := "azurerm_network_interface.test"
+	rInt := acctest.RandInt()
+	resource.Test(t, resource.TestCase{
+		PreCheck:     func() { testAccPreCheck(t) },
+		Providers:    testAccProviders,
+		CheckDestroy: testCheckAzureRMNetworkInterfaceDestroy,
+		Steps: []resource.TestStep{
+			{
+				Config: testAccAzureRMNetworkInterface_applicationGatewayBackendPool(rInt, testLocation()),
+				Check: resource.ComposeTestCheckFunc(
+					testCheckAzureRMNetworkInterfaceExists("azurerm_network_interface.test"),
+					resource.TestCheckResourceAttr(resourceName, "ip_configuration.0.application_gateway_backend_address_pools_ids.#", "1"),
+				),
+			},
+		},
+	})
+}
+
 func TestAccAzureRMNetworkInterface_withTags(t *testing.T) {
 	resourceName := "azurerm_network_interface.test"
 	rInt := acctest.RandInt()
@@ -903,6 +922,118 @@ resource "azurerm_network_interface" "test2" {
 `, rInt, location, rInt, rInt, rInt, rInt, rInt)
 }
 
+func testAccAzureRMNetworkInterface_applicationGatewayBackendPool(rInt int, location string) string {
+	return fmt.Sprintf(`
+resource "azurerm_resource_group" "test" {
+  name     = "acctestrg-%d"
+  location = "%s"
+}
+
+resource "azurerm_virtual_network" "test" {
+  name                = "acctest-vnet-%d"
+  resource_group_name = "${azurerm_resource_group.test.name}"
+  address_space       = ["10.254.0.0/16"]
+  location            = "${azurerm_resource_group.test.location}"
+}
+
+resource "azurerm_subnet" "gateway" {
+  name                 = "subnet-gateway-%d"
+  resource_group_name  = "${azurerm_resource_group.test.name}"
+  virtual_network_name = "${azurerm_virtual_network.test.name}"
+  address_prefix       = "10.254.0.0/24"
+}
+
+resource "azurerm_subnet" "test" {
+  name                 = "subnet-%d"
+  resource_group_name  = "${azurerm_resource_group.test.name}"
+  virtual_network_name = "${azurerm_virtual_network.test.name}"
+  address_prefix       = "10.254.1.0/24"
+}
+
+resource "azurerm_public_ip" "test" {
+  name                         = "acctest-pubip-%d"
+  location                     = "${azurerm_resource_group.test.location}"
+  resource_group_name          = "${azurerm_resource_group.test.name}"
+  public_ip_address_allocation = "dynamic"
+}
+
+resource "azurerm_application_gateway" "test" {
+  name                = "acctestgw-%d"
+  location            = "${azurerm_resource_group.test.location}"
+  resource_group_name = "${azurerm_resource_group.test.name}"
+
+  sku {
+    name     = "Standard_Medium"
+    tier     = "Standard"
+    capacity = 1
+  }
+
+  gateway_ip_configuration {
+    name      = "gw-ip-config1"
+    subnet_id = "${azurerm_subnet.gateway.id}"
+  }
+
+  frontend_port {
+    name = "port-8080"
+    port = 8080
+  }
+
+  frontend_ip_configuration {
+    name                 = "ip-config-public"
+    public_ip_address_id = "${azurerm_public_ip.test.id}"
+  }
+
+  backend_address_pool {
+    name = "pool-1"
+  }
+
+  backend_http_settings {
+    name                  = "backend-http-1"
+    port                  = 8080
+    protocol              = "Http"
+    cookie_based_affinity = "Enabled"
+    request_timeout       = 30
+  }
+
+  http_listener {
+    name = "listener-1"
+    frontend_ip_configuration_name = "ip-config-public"
+    frontend_port_name = "port-8080"
+    protocol           = "Http"
+  }
+
+  request_routing_rule {
+    name      = "rule-basic-1"
+    rule_type = "Basic"
+    http_listener_name = "listener-1"
+    backend_address_pool_name = "pool-1"
+    backend_http_settings_name = "backend-http-1"
+  }
+
+  tags {
+    environment = "tf01"
+  }
+}
+
+resource "azurerm_network_interface" "test" {
+  name                 = "acctestnic-%d"
+  location             = "${azurerm_resource_group.test.location}"
+  resource_group_name  = "${azurerm_resource_group.test.name}"
+  enable_ip_forwarding = true
+
+  ip_configuration {
+    name                          = "testconfiguration1"
+    subnet_id                     = "${azurerm_subnet.test.id}"
+    private_ip_address_allocation = "dynamic"
+
+    application_gateway_backend_address_pools_ids = [
+      "${azurerm_application_gateway.test.backend_address_pool.0.id}",
+    ]
+  }
+}
+`, rInt, location, rInt, rInt, rInt, rInt, rInt, rInt)
+}
+
 func testAccAzureRMNetworkInterface_bug7986(rInt int, location string) string {
 	return fmt.Sprintf(`
 resource "azurerm_resource_group" "test" {

website/docs/r/network_interface.html.markdown

@@ -88,6 +88,8 @@ The `ip_configuration` block supports:
 
 * `public_ip_address_id` - (Optional) Reference to a Public IP Address to associate with this NIC
 
+* `application_gateway_backend_address_pools_ids` - (Optional) List of Application Gateway Backend Address Pool IDs references to which this NIC belongs
+
 * `load_balancer_backend_address_pools_ids` - (Optional) List of Load Balancer Backend Address Pool IDs references to which this NIC belongs
 
 * `load_balancer_inbound_nat_rules_ids` - (Optional) List of Load Balancer Inbound Nat Rules IDs involving this NIC