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OpenStack Study: flavorextradata.py**** CubicPower OpenStack Study ****
# Copyright 2012 OpenStack Foundation # Copyright 2011 Canonical Ltd. # All Rights Reserved. # # 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. """The Flavor extra data extension OpenStack API version 1.1 lists "name", "ram", "disk", "vcpus" as flavor attributes. This extension adds to that list: - OS-FLV-EXT-DATA:ephemeral """ from nova.api.openstack import extensions from nova.api.openstack import wsgi from nova.api.openstack import xmlutil authorize = extensions.soft_extension_authorizer('compute', 'flavorextradata')
**** CubicPower OpenStack Study **** class FlavorextradataController(wsgi.Controller):
**** CubicPower OpenStack Study **** def _extend_flavors(self, req, flavors): for flavor in flavors: db_flavor = req.get_db_flavor(flavor['id']) key = "%s:ephemeral" % Flavorextradata.alias flavor[key] = db_flavor['ephemeral_gb']
**** CubicPower OpenStack Study **** def _show(self, req, resp_obj): if not authorize(req.environ['nova.context']): return if 'flavor' in resp_obj.obj: resp_obj.attach(xml=FlavorextradatumTemplate()) self._extend_flavors(req, [resp_obj.obj['flavor']]) @wsgi.extends
**** CubicPower OpenStack Study **** def show(self, req, resp_obj, id): return self._show(req, resp_obj) @wsgi.extends(action='create')
**** CubicPower OpenStack Study **** def create(self, req, resp_obj, body): return self._show(req, resp_obj) @wsgi.extends
**** CubicPower OpenStack Study **** def detail(self, req, resp_obj): if not authorize(req.environ['nova.context']): return resp_obj.attach(xml=FlavorextradataTemplate()) self._extend_flavors(req, list(resp_obj.obj['flavors']))
**** CubicPower OpenStack Study **** class Flavorextradata(extensions.ExtensionDescriptor): """Provide additional data for flavors.""" name = "FlavorExtraData" alias = "OS-FLV-EXT-DATA" namespace = ("http://docs.openstack.org/compute/ext/" "flavor_extra_data/api/v1.1") updated = "2011-09-14T00:00:00+00:00"
**** CubicPower OpenStack Study **** def get_controller_extensions(self): controller = FlavorextradataController() extension = extensions.ControllerExtension(self, 'flavors', controller) return [extension] def make_flavor(elem): elem.set('{%s}ephemeral' % Flavorextradata.namespace, '%s:ephemeral' % Flavorextradata.alias)
**** CubicPower OpenStack Study **** def make_flavor(elem): elem.set('{%s}ephemeral' % Flavorextradata.namespace, '%s:ephemeral' % Flavorextradata.alias)
**** CubicPower OpenStack Study **** class FlavorextradatumTemplate(xmlutil.TemplateBuilder):
**** CubicPower OpenStack Study **** def construct(self): root = xmlutil.TemplateElement('flavor', selector='flavor') make_flavor(root) alias = Flavorextradata.alias namespace = Flavorextradata.namespace return xmlutil.SlaveTemplate(root, 1, nsmap={alias: namespace})
**** CubicPower OpenStack Study **** class FlavorextradataTemplate(xmlutil.TemplateBuilder):
**** CubicPower OpenStack Study **** def construct(self): root = xmlutil.TemplateElement('flavors') elem = xmlutil.SubTemplateElement(root, 'flavor', selector='flavors') make_flavor(elem) alias = Flavorextradata.alias namespace = Flavorextradata.namespace return xmlutil.SlaveTemplate(root, 1, nsmap={alias: namespace})
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