Implement quotas for the new v1.1 server metadata controller.

Created a new _check_metadata_properties_quota method in the compute API that is used when creating instances and when updating server metadata. In doing so I modified the compute API so that metadata is a dict (not an array) to ensure we are using unique key values for metadata (which is implied by the API specs) and makes more sense with JSON request formats anyway.

Additionally this branch enables and fixes the integration test to create servers with metadata.

2 files changed, 23 insertions, 18 deletions

diff --git a/nova/api/openstack/server_metadata.py b/nova/api/openstack/server_metadata.py
index 5c1390b9c..fd64ee4fb 100644
--- a/nova/api/openstack/server_metadata.py
+++ b/nova/api/openstack/server_metadata.py
@@ -18,6 +18,7 @@
 from webob import exc
 
 from nova import compute
+from nova import quota
 from nova import wsgi
 from nova.api.openstack import common
 from nova.api.openstack import faults
@@ -44,10 +45,14 @@ class Controller(common.OpenstackController):
 
     def create(self, req, server_id):
         context = req.environ['nova.context']
-        body = self._deserialize(req.body, req.get_content_type())
-        self.compute_api.update_or_create_instance_metadata(context,
-                                                            server_id,
-                                                            body['metadata'])
+        data = self._deserialize(req.body, req.get_content_type())
+        metadata = data.get('metadata')
+        try:
+            self.compute_api.update_or_create_instance_metadata(context,
+                                                                server_id,
+                                                                metadata)
+        except quota.QuotaError as error:
+            self._handle_quota_error(error)
         return req.body
 
     def update(self, req, server_id, id):
@@ -59,9 +64,13 @@ class Controller(common.OpenstackController):
         if len(body) > 1:
             expl = _('Request body contains too many items')
             raise exc.HTTPBadRequest(explanation=expl)
-        self.compute_api.update_or_create_instance_metadata(context,
-                                                            server_id,
-                                                            body)
+        try:
+            self.compute_api.update_or_create_instance_metadata(context,
+                                                                server_id,
+                                                                body)
+        except quota.QuotaError as error:
+            self._handle_quota_error(error)
+
         return req.body
 
     def show(self, req, server_id, id):
@@ -77,3 +86,9 @@ class Controller(common.OpenstackController):
         """ Deletes an existing metadata """
         context = req.environ['nova.context']
         self.compute_api.delete_instance_metadata(context, server_id, id)
+
+    def _handle_quota_error(self, error):
+        """Reraise quota errors as api-specific http exceptions."""
+        if error.code == "MetadataLimitExceeded":
+            raise exc.HTTPBadRequest(explanation=error.message)
+        raise error
diff --git a/nova/api/openstack/servers.py b/nova/api/openstack/servers.py
index f221229f0..22a9c632c 100644
--- a/nova/api/openstack/servers.py
+++ b/nova/api/openstack/servers.py
@@ -139,16 +139,6 @@ class Controller(common.OpenstackController):
         kernel_id, ramdisk_id = self._get_kernel_ramdisk_from_image(
             req, image_id)
 
-        # Metadata is a list, not a Dictionary, because we allow duplicate keys
-        # (even though JSON can't encode this)
-        # In future, we may not allow duplicate keys.
-        # However, the CloudServers API is not definitive on this front,
-        #  and we want to be compatible.
-        metadata = []
-        if env['server'].get('metadata'):
-            for k, v in env['server']['metadata'].items():
-                metadata.append({'key': k, 'value': v})
-
         personality = env['server'].get('personality')
         injected_files = []
         if personality:
@@ -177,7 +167,7 @@ class Controller(common.OpenstackController):
                 display_description=name,
                 key_name=key_name,
                 key_data=key_data,
-                metadata=metadata,
+                metadata=env['server'].get('metadata', {}),
                 injected_files=injected_files)
         except quota.QuotaError as error:
             self._handle_quota_error(error)