Amend device configs when renaming.

gns3server/modules/iou/__init__.py

@@ -437,7 +437,7 @@ class IOU(IModule):
                     except OSError as e:
                         raise IOUError("Could not save the configuration from {} to {}: {}".format(request["startup_config"], config_path, e))
                 elif not os.path.isfile(config_path):
-                    raise IOUError("Startup-config {} could not be found on this server".format(config_path))
+                    raise IOUError("Startup-config {} could not be found on this server".format(request["startup_config"]))
         except IOUError as e:
             self.send_custom_error(str(e))
             return

gns3server/modules/iou/iou_device.py

@@ -177,10 +177,23 @@ class IOUDevice(object):
         :param new_name: name
         """
 
-        self._name = new_name
+        if self._startup_config:
+            # update the startup-config
+            config_path = os.path.join(self.working_dir, "startup-config")
+            if os.path.isfile(config_path):
+                try:
+                    with open(config_path, "r+") as f:
+                        old_config = f.read()
+                        new_config = old_config.replace(self._name, new_name)
+                        f.seek(0)
+                        f.write(new_config)
+                except OSError as e:
+                    raise IOUError("Could not amend the configuration {}: {}".format(config_path, e))
+
         log.info("IOU {name} [id={id}]: renamed to {new_name}".format(name=self._name,
                                                                       id=self._id,
                                                                       new_name=new_name))
+        self._name = new_name
 
     @property
     def path(self):