Make Network Endpoint Port optional

.changelog/6373.txt

@@ -0,0 +1,3 @@
+```release-note:enhancement
+compute: made `port` optional in `google_compute_network_endpoint` to be associated with `GCE_VM_IP` network endpoint groups
+```

google/resource_compute_network_endpoint.go

@@ -54,12 +54,6 @@ range).`,
 				DiffSuppressFunc: compareResourceNames,
 				Description:      `The network endpoint group this endpoint is part of.`,
 			},
-			"port": {
-				Type:        schema.TypeInt,
-				Required:    true,
-				ForceNew:    true,
-				Description: `Port number of network endpoint.`,
-			},
 			"instance": {
 				Type:             schema.TypeString,
 				Optional:         true,
@@ -69,6 +63,12 @@ range).`,
 This is required for network endpoints of type GCE_VM_IP_PORT.
 The instance must be in the same zone of network endpoint group.`,
 			},
+			"port": {
+				Type:        schema.TypeInt,
+				Optional:    true,
+				ForceNew:    true,
+				Description: `Port number of network endpoint.`,
+			},
 			"zone": {
 				Type:             schema.TypeString,
 				Computed:         true,
@@ -285,7 +285,9 @@ func resourceComputeNetworkEndpointDelete(d *schema.ResourceData, meta interface
 	if err != nil {
 		return err
 	}
-	toDelete["port"] = portProp
+	if portProp != 0 {
+		toDelete["port"] = portProp
+	}
 
 	ipAddressProp, err := expandNestedComputeNetworkEndpointIpAddress(d.Get("ip_address"), d, config)
 	if err != nil {

google/resource_compute_network_endpoint_group_test.go

@@ -31,6 +31,31 @@ func TestAccComputeNetworkEndpointGroup_networkEndpointGroup(t *testing.T) {
 	})
 }
 
+func TestAccComputeNetworkEndpointGroup_internalEndpoint(t *testing.T) {
+	t.Parallel()
+
+	context := map[string]interface{}{
+		"random_suffix": randString(t, 10),
+	}
+
+	vcrTest(t, resource.TestCase{
+		PreCheck:     func() { testAccPreCheck(t) },
+		Providers:    testAccProviders,
+		CheckDestroy: testAccCheckComputeNetworkEndpointGroupDestroyProducer(t),
+		Steps: []resource.TestStep{
+			{
+				Config: testAccComputeNetworkEndpointGroup_internalEndpoint(context),
+			},
+			{
+				ResourceName:            "google_compute_network_endpoint_group.neg",
+				ImportState:             true,
+				ImportStateVerify:       true,
+				ImportStateVerifyIgnore: []string{"network", "subnetwork", "zone"},
+			},
+		},
+	})
+}
+
 func testAccComputeNetworkEndpointGroup_networkEndpointGroup(context map[string]interface{}) string {
 	return Nprintf(`
 resource "google_compute_network_endpoint_group" "neg" {
@@ -46,3 +71,53 @@ resource "google_compute_network" "default" {
 }
 `, context)
 }
+
+func testAccComputeNetworkEndpointGroup_internalEndpoint(context map[string]interface{}) string {
+	return Nprintf(`
+resource "google_compute_network_endpoint_group" "neg" {
+  name                  = "tf-test-my-lb-neg%{random_suffix}"
+  network               = google_compute_network.internal.id
+  subnetwork            = google_compute_subnetwork.internal.id
+  zone                  = "us-central1-a"
+  network_endpoint_type = "GCE_VM_IP"
+}
+
+resource "google_compute_network_endpoint" "endpoint" {
+  network_endpoint_group = google_compute_network_endpoint_group.neg.name
+  #ip_address             = "127.0.0.1"
+  instance   = google_compute_instance.default.name
+  ip_address = google_compute_instance.default.network_interface[0].network_ip
+}
+
+resource "google_compute_network" "internal" {
+  name                    = "tf-test-neg-network%{random_suffix}"
+  auto_create_subnetworks = false
+}
+
+resource "google_compute_subnetwork" "internal"{
+  name                    = "tf-test-my-subnetwork%{random_suffix}"
+  network                 = google_compute_network.internal.id
+  ip_cidr_range           = "10.128.0.0/20"
+  region                  = "us-central1"
+  private_ip_google_access= true
+}
+
+resource "google_compute_instance" "default" {
+  name         = "tf-test-neg-%{random_suffix}"
+  machine_type = "e2-medium"
+
+  boot_disk {
+    initialize_params {
+      image = "debian-8-jessie-v20160803"
+    }
+   }
+
+  network_interface {
+    subnetwork = google_compute_subnetwork.internal.self_link
+    access_config {
+    }
+  }
+}
+
+`, context)
+}

website/docs/r/compute_network_endpoint.html.markdown

@@ -94,10 +94,6 @@ resource "google_compute_subnetwork" "default" {
 The following arguments are supported:
 
 
-* `port` -
-  (Required)
-  Port number of network endpoint.
-
 * `ip_address` -
   (Required)
   IPv4 address of network endpoint. The IP address must belong
@@ -118,6 +114,10 @@ The following arguments are supported:
   This is required for network endpoints of type GCE_VM_IP_PORT.
   The instance must be in the same zone of network endpoint group.
 
+* `port` -
+  (Optional)
+  Port number of network endpoint.
+
 * `zone` -
   (Optional)
   Zone where the containing network endpoint group is located.