Key user_data in create server off of extension

Implements part of blueprint disable-server-extensions

Adds a new extension descriptor for user_data and makes sure that
user_data is only accepted in the create server request if the
extension is enabled.

Change-Id: I7aef0ebe569da841adbf380d5695c9029fb3b002

2 files changed, 30 insertions, 1 deletions

diff --git a/nova/api/openstack/compute/contrib/user_data.py b/nova/api/openstack/compute/contrib/user_data.py
new file mode 100644
index 000000000..debd1176e
--- /dev/null
+++ b/nova/api/openstack/compute/contrib/user_data.py
@@ -0,0 +1,27 @@
+# vim: tabstop=4 shiftwidth=4 softtabstop=4
+
+# Copyright 2012 OpenStack LLC.
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License
+
+from nova.api.openstack import extensions
+
+
+class User_data(extensions.ExtensionDescriptor):
+    """Add user_data to the Create Server v1.1 API"""
+
+    name = "UserData"
+    alias = "os-user-data"
+    namespace = ("http://docs.openstack.org/compute/ext/"
+                 "userdata/api/v1.1")
+    updated = "2012-08-07T00:00:00+00:00"
diff --git a/nova/api/openstack/compute/servers.py b/nova/api/openstack/compute/servers.py
index 6756338d8..b378d4139 100644
--- a/nova/api/openstack/compute/servers.py
+++ b/nova/api/openstack/compute/servers.py
@@ -642,7 +642,9 @@ class Controller(wsgi.Controller):
 
         # optional openstack extensions:
         key_name = server_dict.get('key_name')
-        user_data = server_dict.get('user_data')
+        user_data = None
+        if self.ext_mgr.is_loaded('os-user-data'):
+            user_data = server_dict.get('user_data')
         self._validate_user_data(user_data)
 
         availability_zone = server_dict.get('availability_zone')