add disk_id attribute in google_compute_disk resource (#9857) (#17112)

[upstream:9036b258fd1e269ebe4b6ffae9decfed02f790e7]

Signed-off-by: Modular Magician <[email protected]>

Author: modular-magician

.changelog/9857.txt

@@ -0,0 +1,3 @@
+```release-note:enhancement
+compute: added `disk_id` attribute to `google_compute_disk` resource
+```

google/services/compute/resource_compute_disk.go

@@ -651,6 +651,11 @@ create the disk. Provide this when creating the disk.`,
 				DiffSuppressFunc: tpgresource.CompareSelfLinkOrResourceName,
 				Description:      `A reference to the zone where the disk resides.`,
 			},
+			"disk_id": {
+				Type:        schema.TypeString,
+				Computed:    true,
+				Description: `The unique identifier for the resource. This identifier is defined by the server.`,
+			},
 			"creation_timestamp": {
 				Type:        schema.TypeString,
 				Computed:    true,
@@ -1026,6 +1031,9 @@ func resourceComputeDiskRead(d *schema.ResourceData, meta interface{}) error {
 	if err := d.Set("source_disk_id", flattenComputeDiskSourceDiskId(res["sourceDiskId"], d, config)); err != nil {
 		return fmt.Errorf("Error reading Disk: %s", err)
 	}
+	if err := d.Set("disk_id", flattenComputeDiskDiskId(res["id"], d, config)); err != nil {
+		return fmt.Errorf("Error reading Disk: %s", err)
+	}
 	if err := d.Set("type", flattenComputeDiskType(res["type"], d, config)); err != nil {
 		return fmt.Errorf("Error reading Disk: %s", err)
 	}
@@ -1524,6 +1532,10 @@ func flattenComputeDiskSourceDiskId(v interface{}, d *schema.ResourceData, confi
 	return v
 }
 
+func flattenComputeDiskDiskId(v interface{}, d *schema.ResourceData, config *transport_tpg.Config) interface{} {
+	return v
+}
+
 func flattenComputeDiskType(v interface{}, d *schema.ResourceData, config *transport_tpg.Config) interface{} {
 	if v == nil {
 		return v

website/docs/r/compute_disk.html.markdown

@@ -432,6 +432,9 @@ In addition to the arguments listed above, the following computed attributes are
   be used to determine whether the image was taken from the current
   or a previous instance of a given disk name.
 
+* `disk_id` -
+  The unique identifier for the resource. This identifier is defined by the server.
+
 * `terraform_labels` -
   The combination of labels configured directly on the resource
    and default labels configured on the provider.