Add enable_cdn to google_compute_backend_service.

Add the ability to add/remove the Cloud CDN configuration
option on a backend service.

builtin/providers/google/resource_compute_backend_service.go

@@ -88,6 +88,11 @@ func resourceComputeBackendService() *schema.Resource {
 				Optional: true,
 			},
 
+			"enable_cdn": &schema.Schema{
+				Type:     schema.TypeBool,
+				Optional: true,
+			},
+
 			"fingerprint": &schema.Schema{
 				Type:     schema.TypeString,
 				Computed: true,
@@ -165,6 +170,10 @@ func resourceComputeBackendServiceCreate(d *schema.ResourceData, meta interface{
 		service.TimeoutSec = int64(v.(int))
 	}
 
+	if v, ok := d.GetOk("enable_cdn"); ok {
+		service.EnableCDN = v.(bool)
+	}
+
 	project, err := getProject(d, config)
 	if err != nil {
 		return err
@@ -212,6 +221,7 @@ func resourceComputeBackendServiceRead(d *schema.ResourceData, meta interface{})
 	}
 
 	d.Set("description", service.Description)
+	d.Set("enable_cdn", service.EnableCDN)
 	d.Set("port_name", service.PortName)
 	d.Set("protocol", service.Protocol)
 	d.Set("timeout_sec", service.TimeoutSec)
@@ -260,6 +270,10 @@ func resourceComputeBackendServiceUpdate(d *schema.ResourceData, meta interface{
 		service.TimeoutSec = int64(d.Get("timeout_sec").(int))
 	}
 
+	if d.HasChange("enable_cdn") {
+		service.EnableCDN = d.Get("enable_cdn").(bool)
+	}
+
 	log.Printf("[DEBUG] Updating existing Backend Service %q: %#v", d.Id(), service)
 	op, err := config.clientCompute.BackendServices.Update(
 		project, d.Id(), &service).Do()

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

@@ -19,6 +19,7 @@ resource "google_compute_backend_service" "foobar" {
   port_name   = "http"
   protocol    = "HTTP"
   timeout_sec = 10
+  enable_cdn  = false
 
   backend {
     group = "${google_compute_instance_group_manager.foo.instance_group}"
@@ -74,6 +75,8 @@ The following arguments are supported:
 
 * `description` - (Optional) The textual description for the backend service.
 
+* `enable_cdn` - (Optional) Whether or not to enable the Cloud CDN on the backend service.
+
 * `port_name` - (Optional) The name of a service that has been added to an
     instance group in this backend. See [related docs](https://cloud.google.com/compute/docs/instance-groups/#specifying_service_endpoints) for details. Defaults to http.