Catch volume create exception

Catch InvalidInput exception from cinder when the parameters
are invalid such as an invalid size. Currently the exception
is not caught which results in a 400 Bad Request correctly being
returned, but also leaving a traceback in the logs. Correctly
catching the exception and explicitly raising an HTTPBadRequest
removes the production of the traceback

Fixes bug #1098048

Change-Id: Ia66e67f302cf20e96417f4ff3c1430b755a4a861

2 files changed, 31 insertions, 9 deletions

diff --git a/nova/api/openstack/compute/contrib/volumes.py b/nova/api/openstack/compute/contrib/volumes.py
index 640ac0c76..5b2097365 100644
--- a/nova/api/openstack/compute/contrib/volumes.py
+++ b/nova/api/openstack/compute/contrib/volumes.py
@@ -244,15 +244,19 @@ class VolumeController(wsgi.Controller):
 
         availability_zone = vol.get('availability_zone', None)
 
-        new_volume = self.volume_api.create(context,
-                                            size,
-                                            vol.get('display_name'),
-                                            vol.get('display_description'),
-                                            snapshot=snapshot,
-                                            volume_type=vol_type,
-                                            metadata=metadata,
-                                            availability_zone=availability_zone
-                                           )
+        try:
+            new_volume = self.volume_api.create(
+                context,
+                size,
+                vol.get('display_name'),
+                vol.get('display_description'),
+                snapshot=snapshot,
+                volume_type=vol_type,
+                metadata=metadata,
+                availability_zone=availability_zone
+                )
+        except exception.InvalidInput as err:
+            raise exc.HTTPBadRequest(explanation=str(err))
 
         # TODO(vish): Instance should be None at db layer instead of
         #             trying to lazy load, but for now we turn it into
diff --git a/nova/tests/api/openstack/compute/contrib/test_volumes.py b/nova/tests/api/openstack/compute/contrib/test_volumes.py
index 83372b251..256fb58fc 100644
--- a/nova/tests/api/openstack/compute/contrib/test_volumes.py
+++ b/nova/tests/api/openstack/compute/contrib/test_volumes.py
@@ -24,6 +24,7 @@ from nova.api.openstack.compute.contrib import volumes
 from nova.compute import api as compute_api
 from nova.compute import instance_types
 from nova import context
+from nova import exception
 from nova.openstack.common import jsonutils
 from nova.openstack.common import timeutils
 from nova import test
@@ -183,6 +184,23 @@ class VolumeApiTest(test.TestCase):
         self.assertEqual(resp_dict['volume']['availabilityZone'],
                          vol['availability_zone'])
 
+    def test_volume_create_bad(self):
+        def fake_volume_create(self, context, size, name, description,
+                               snapshot, **param):
+            raise exception.InvalidInput(reason="bad request data")
+
+        self.stubs.Set(cinder.API, "create", fake_volume_create)
+
+        vol = {"size": '#$?',
+               "display_name": "Volume Test Name",
+               "display_description": "Volume Test Desc",
+               "availability_zone": "zone1:host1"}
+        body = {"volume": vol}
+
+        req = fakes.HTTPRequest.blank('/v2/fake/os-volumes')
+        self.assertRaises(webob.exc.HTTPBadRequest,
+                          volumes.VolumeController().create, req, body)
+
     def test_volume_index(self):
         req = webob.Request.blank('/v2/fake/os-volumes')
         resp = req.get_response(self.app)