- Better error reporting.

- Flask now uses application's logger instead of its own.
- ucloud file scanner refactored.

ucloud/settings/__init__.py

@@ -5,7 +5,6 @@ import os
 
 from ucloud.common.etcd_wrapper import Etcd3Wrapper
 
-
 logger = logging.getLogger(__name__)
 
 
@@ -14,8 +13,9 @@ class CustomConfigParser(configparser.RawConfigParser):
         try:
             result = super().__getitem__(key)
         except KeyError as err:
-            raise KeyError("Key '{}' not found in config file"\
-                           .format(key)) from err
+            raise KeyError(
+                'Key \'{}\' not found in configuration. Make sure you configure ucloud.'.format(key)
+            ) from err
         else:
             return result
 
@@ -78,7 +78,7 @@ class Settings(object):
         if config_from_etcd:
             self.config_parser.read_dict(config_from_etcd.value)
         else:
-            raise KeyError("Key '{}' not found in etcd".format(self.config_key))
+            raise KeyError("Key '{}' not found in etcd. Please configure ucloud.".format(self.config_key))
 
     def __getitem__(self, key):
         self.read_values_from_etcd()