add device_name attribute to ucloud_disk_attachment

ucloud/resource_ucloud_disk_attachment.go

@@ -43,6 +43,11 @@ func resourceUCloudDiskAttachment() *schema.Resource {
 				Type:     schema.TypeBool,
 				Optional: true,
 			},
+
+			"device_name": {
+				Type:     schema.TypeString,
+				Computed: true,
+			},
 		},
 	}
 }
@@ -100,6 +105,7 @@ func resourceUCloudDiskAttachmentRead(d *schema.ResourceData, meta interface{})
 	d.Set("availability_zone", d.Get("availability_zone").(string))
 	d.Set("instance_id", resourceSet.UHostId)
 	d.Set("disk_id", resourceSet.UDiskId)
+	d.Set("device_name", resourceSet.DeviceName)
 
 	return nil
 }

website/docs/r/disk_attachment.html.markdown

@@ -59,4 +59,10 @@ The following arguments are supported:
 * `instance_id` - (Required, ForceNew) The ID of instance.
 * `disk_id` - (Required, ForceNew) The ID of disk that needs to be attached
 * `stop_instance_before_detaching` - (Optional, Boolean) Set this to true to ensure that the target instance is stopped
-  before trying to detach the volume.
+  before trying to detach the volume.
+
+## Attributes Reference
+
+In addition to all arguments above, the following attributes are exported:
+
+* `device_name` - The device name to expose to the instance, for example `vdb`.