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OpenStack Study: scheduler_hints.py**** CubicPower OpenStack Study ****
# Copyright 2011 OpenStack Foundation # # 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. import webob.exc from nova.api.openstack import extensions from nova.api.openstack import wsgi from nova.openstack.common.gettextutils import _
**** CubicPower OpenStack Study **** class SchedulerHintsController(wsgi.Controller): @staticmethod
**** CubicPower OpenStack Study **** def _extract_scheduler_hints(body): hints = {} attr = '%s:scheduler_hints' % Scheduler_hints.alias try: if 'os:scheduler_hints' in body: # NOTE(vish): This is for legacy support hints.update(body['os:scheduler_hints']) elif attr in body: hints.update(body[attr]) # Fail if non-dict provided except ValueError: msg = _("Malformed scheduler_hints attribute") raise webob.exc.HTTPBadRequest(explanation=msg) return hints @wsgi.extends
**** CubicPower OpenStack Study **** def create(self, req, body): hints = self._extract_scheduler_hints(body) if 'server' in body: body['server']['scheduler_hints'] = hints yield
**** CubicPower OpenStack Study **** class Scheduler_hints(extensions.ExtensionDescriptor): """Pass arbitrary key/value pairs to the scheduler.""" name = "SchedulerHints" alias = "OS-SCH-HNT" namespace = ("http://docs.openstack.org/compute/ext/" "scheduler-hints/api/v2") updated = "2011-07-19T00:00:00+00:00"
**** CubicPower OpenStack Study **** def get_controller_extensions(self): controller = SchedulerHintsController() ext = extensions.ControllerExtension(self, 'servers', controller) return [ext]
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