Check connection for scan jobs before actually running the job, fail

early if the system tracking database isn't available

awx/fact/utils/connection.py

@@ -0,0 +1,26 @@
+# Copyright (c) 2015 Ansible, Inc. (formerly AnsibleWorks, Inc.)
+# All Rights Reserved.
+
+from django.conf import settings
+from mongoengine import connect
+from mongoengine.connection import get_db, ConnectionError
+
+def test_mongo_connection():
+    # Connect to Mongo
+    try:
+        # Sanity check: If we have intentionally invalid settings, then we
+        # know we cannot connect.
+        if settings.MONGO_HOST == NotImplemented:
+            raise ConnectionError
+
+        # Attempt to connect to the MongoDB database.
+        connect(settings.MONGO_DB,
+                host=settings.MONGO_HOST,
+                port=int(settings.MONGO_PORT),
+                username=settings.MONGO_USERNAME,
+                password=settings.MONGO_PASSWORD,
+                tz_aware=settings.USE_TZ)
+        return True
+    except ConnectionError:
+        return False
+