Search configured project image families (#9243)

* Search configured project image families

* Clarify documentation around google_compute_instance image families

* Acceptance test for private instance family creation

builtin/providers/google/image.go

@@ -21,12 +21,18 @@ func resolveImage(c *Config, name string) (string, error) {
 
 			// Must infer the project name:
 
-			// First, try the configured project.
+			// First, try the configured project for a specific image:
 			image, err := c.clientCompute.Images.Get(c.Project, name).Do()
 			if err == nil {
 				return image.SelfLink, nil
 			}
 
+			// If it doesn't exist, try to see if it works as an image family:
+			image, err = c.clientCompute.Images.GetFromFamily(c.Project, name).Do()
+			if err == nil {
+				return image.SelfLink, nil
+			}
+
 			// If we match a lookup for an alternate project, then try that next.
 			// If not, we return the original error.
 

builtin/providers/google/resource_compute_instance_test.go

@@ -458,6 +458,30 @@ func TestAccComputeInstance_address_custom(t *testing.T) {
 		},
 	})
 }
+
+func TestAccComputeInstance_private_image_family(t *testing.T) {
+	var instance compute.Instance
+	var instanceName = fmt.Sprintf("instance-test-%s", acctest.RandString(10))
+	var diskName = fmt.Sprintf("instance-testd-%s", acctest.RandString(10))
+	var imageName = fmt.Sprintf("instance-testi-%s", acctest.RandString(10))
+	var familyName = fmt.Sprintf("instance-testf-%s", acctest.RandString(10))
+
+	resource.Test(t, resource.TestCase{
+		PreCheck:     func() { testAccPreCheck(t) },
+		Providers:    testAccProviders,
+		CheckDestroy: testAccCheckComputeInstanceDestroy,
+		Steps: []resource.TestStep{
+			resource.TestStep{
+				Config: testAccComputeInstance_private_image_family(diskName, imageName, familyName, instanceName),
+				Check: resource.ComposeTestCheckFunc(
+					testAccCheckComputeInstanceExists(
+						"google_compute_instance.foobar", &instance),
+				),
+			},
+		},
+	})
+}
+
 func testAccCheckComputeInstanceDestroy(s *terraform.State) error {
 	config := testAccProvider.Meta().(*Config)
 
@@ -1095,3 +1119,36 @@ func testAccComputeInstance_address_custom(instance, address string) string {
 
 	}`, acctest.RandString(10), acctest.RandString(10), instance, address)
 }
+
+func testAccComputeInstance_private_image_family(disk, image, family, instance string) string {
+	return fmt.Sprintf(`
+		resource "google_compute_disk" "foobar" {
+			name = "%s"
+			zone = "us-central1-a"
+			image = "debian-8-jessie-v20160803"
+		}
+
+		resource "google_compute_image" "foobar" {
+			name = "%s"
+			source_disk = "${google_compute_disk.foobar.self_link}"
+			family = "%s"
+		}
+
+		resource "google_compute_instance" "foobar" {
+			name = "%s"
+			machine_type = "n1-standard-1"
+			zone = "us-central1-a"
+
+			disk {
+				image = "${google_compute_image.foobar.family}"
+			}
+
+			network_interface {
+				network = "default"
+			}
+
+			metadata {
+				foo = "bar"
+			}
+		}`, disk, image, family, instance)
+}

website/source/docs/providers/google/r/compute_instance.html.markdown

@@ -112,9 +112,11 @@ the type is "local-ssd", in which case scratch must be true).
     `google_compute_disk`) to attach.
 
 * `image` - The image from which to initialize this
-    disk. Either the full URL, a contraction of the form "project/name", an
+    disk. Either the full URL, a contraction of the form "project/name", the
+    name of a Google-supported
     [image family](https://cloud.google.com/compute/docs/images#image_families),
-    or just a name (in which case the current project is used).
+    or simple the name of an image or image family (in which case the current
+    project is used).
 
 * `auto_delete` - (Optional) Whether or not the disk should be auto-deleted.
     This defaults to true. Leave true for local SSDs.