Add a 'none' datasource as a last resort fallback

1. This will allow a basically empty datasource to be
   activated (as the last datasource) when no other
   datasources work. This allows modules to still
   run (if they can, new function added to the datasource
   if modules want to check if cloud-init is in this
   'disconnected' state).

1 files changed, 4 insertions, 0 deletions

diff --git a/cloudinit/sources/__init__.py b/cloudinit/sources/__init__.py
index b25724a5..ca9f58e5 100644
--- a/cloudinit/sources/__init__.py
+++ b/cloudinit/sources/__init__.py
@@ -65,6 +65,10 @@ class DataSource(object):
             self.userdata = self.ud_proc.process(raw_data)
         return self.userdata
 
+    @property
+    def is_disconnected(self):
+        return False
+
     def get_userdata_raw(self):
         return self.userdata_raw