blueprint host-aggregates: maintenance operations to host OSAPI exts

This commit introduces sub for a host maintenance_mode option into
the osapi. It is required for the host aggregates work.

This is part of a series of commits that have started with change:
https://review.openstack.org/#change,3035

Change-Id: Ib462ef9ad6b641bf1083cc176dfba6645020ccec

1 files changed, 6 insertions, 2 deletions

diff --git a/nova/api/openstack/compute/contrib/hosts.py b/nova/api/openstack/compute/contrib/hosts.py
index 66dd64def..726ccb372 100644
--- a/nova/api/openstack/compute/contrib/hosts.py
+++ b/nova/api/openstack/compute/contrib/hosts.py
@@ -52,6 +52,7 @@ class HostUpdateTemplate(xmlutil.TemplateBuilder):
         root = xmlutil.TemplateElement('host')
         root.set('host')
         root.set('status')
+        root.set('maintenance_mode')
 
         return xmlutil.MasterTemplate(root, 1)
 
@@ -125,15 +126,18 @@ class HostController(object):
             # settings may follow.
             if key == "status":
                 if val[:6] in ("enable", "disabl"):
-                    return self._set_enabled_status(req, id,
-                            enabled=(val.startswith("enable")))
+                    enabled = val.startswith("enable")
                 else:
                     explanation = _("Invalid status: '%s'") % raw_val
                     raise webob.exc.HTTPBadRequest(explanation=explanation)
+            elif key == "maintenance_mode":
+                raise webob.exc.HTTPNotImplemented
             else:
                 explanation = _("Invalid update setting: '%s'") % raw_key
                 raise webob.exc.HTTPBadRequest(explanation=explanation)
 
+        return self._set_enabled_status(req, id, enabled=enabled)
+
     def _set_enabled_status(self, req, host, enabled):
         """Sets the specified host's ability to accept new instances."""
         context = req.environ['nova.context']