Raise 409 when rescuing instance in RESCUE mode

fixes bud #940581

Change-Id: I8c6b600d36a35ef4e32f35b888f8f2eb8effebcd

2 files changed, 9 insertions, 1 deletions

diff --git a/nova/api/openstack/compute/contrib/rescue.py b/nova/api/openstack/compute/contrib/rescue.py
index bd2d09162..20158ff22 100644
--- a/nova/api/openstack/compute/contrib/rescue.py
+++ b/nova/api/openstack/compute/contrib/rescue.py
@@ -17,6 +17,7 @@
 import webob
 from webob import exc
 
+from nova.api.openstack import common
 from nova.api.openstack import extensions as exts
 from nova.api.openstack import wsgi
 from nova import compute
@@ -56,7 +57,12 @@ class RescueController(wsgi.Controller):
             password = utils.generate_password(FLAGS.password_length)
 
         instance = self._get_instance(context, id)
-        self.compute_api.rescue(context, instance, rescue_password=password)
+        try:
+            self.compute_api.rescue(context, instance,
+                                    rescue_password=password)
+        except exception.InstanceInvalidState as state_error:
+            common.raise_http_conflict_for_instance_invalid_state(state_error,
+                                                                  'rescue')
         return {'adminPass': password}
 
     @wsgi.action('unrescue')
diff --git a/nova/api/openstack/extensions.py b/nova/api/openstack/extensions.py
index 7d4a167dd..87d215974 100644
--- a/nova/api/openstack/extensions.py
+++ b/nova/api/openstack/extensions.py
@@ -301,6 +301,8 @@ def wrap_errors(fn):
     def wrapped(*args, **kwargs):
         try:
             return fn(*args, **kwargs)
+        except webob.exc.HTTPException:
+            raise
         except Exception:
             raise webob.exc.HTTPInternalServerError()
     return wrapped