Removed defaults for instance and description

README.md

@@ -33,8 +33,6 @@ The following environment variables will override any config or default:
 * Defaults, if not sent:
   | Field       | Default value |
   |-------------|---------------|
-  | Description | `[nodata]`    |
-  | Instance    | `[unknown]`   |
   | Priority    | `5`           |
   | Severity    | `Warning`     |
 

src/alertify/messaging.py

@@ -37,14 +37,16 @@ class MessageHandler:
             else:
                 prefix = alert['labels'].get('severity', 'warning')
 
+            instance = alert['labels'].get('instance', None)
+
             gotify_msg = {
                 'title': '[{}] {}'.format(
                     prefix.upper(),
                     alert['annotations'].get('summary'),
                 ),
-                'message': '{}: {}'.format(
-                    alert['labels'].get('instance', '[unknown]'),
-                    alert['annotations'].get('description', '[nodata]'),
+                'message': '{}{}'.format(
+                    f'{instance}: ' if instance else '',
+                    alert['annotations'].get('description', ''),
                 ),
                 'priority': int(alert['labels'].get('priority', 5)),
                 'extras': {