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OpenStack Study: config_drive.py**** CubicPower OpenStack Study ****
# Copyright 2012 OpenStack Foundation # 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. """Config Drive extension.""" from nova.api.openstack.compute import servers from nova.api.openstack import extensions from nova.api.openstack import wsgi from nova.api.openstack import xmlutil authorize = extensions.soft_extension_authorizer('compute', 'config_drive')
**** CubicPower OpenStack Study **** class ServerConfigDriveTemplate(xmlutil.TemplateBuilder):
**** CubicPower OpenStack Study **** def construct(self): root = xmlutil.TemplateElement('server') root.set('config_drive', 'config_drive') return xmlutil.SlaveTemplate(root, 1)
**** CubicPower OpenStack Study **** class ServersConfigDriveTemplate(xmlutil.TemplateBuilder):
**** CubicPower OpenStack Study **** def construct(self): root = xmlutil.TemplateElement('servers') elem = xmlutil.SubTemplateElement(root, 'server', selector='servers') elem.set('config_drive', 'config_drive') return xmlutil.SlaveTemplate(root, 1)
**** CubicPower OpenStack Study **** class Controller(servers.Controller):
**** CubicPower OpenStack Study **** def _add_config_drive(self, req, servers): for server in servers: db_server = req.get_db_instance(server['id']) # server['id'] is guaranteed to be in the cache due to # the core API adding it in its 'show'/'detail' methods. server['config_drive'] = db_server['config_drive']
**** CubicPower OpenStack Study **** def _show(self, req, resp_obj): if 'server' in resp_obj.obj: resp_obj.attach(xml=ServerConfigDriveTemplate()) server = resp_obj.obj['server'] self._add_config_drive(req, [server]) @wsgi.extends
**** CubicPower OpenStack Study **** def show(self, req, resp_obj, id): context = req.environ['nova.context'] if authorize(context): self._show(req, resp_obj) @wsgi.extends
**** CubicPower OpenStack Study **** def detail(self, req, resp_obj): context = req.environ['nova.context'] if 'servers' in resp_obj.obj and authorize(context): resp_obj.attach(xml=ServersConfigDriveTemplate()) servers = resp_obj.obj['servers'] self._add_config_drive(req, servers)
**** CubicPower OpenStack Study **** class Config_drive(extensions.ExtensionDescriptor): """Config Drive Extension.""" name = "ConfigDrive" alias = "os-config-drive" namespace = "http://docs.openstack.org/compute/ext/config_drive/api/v1.1" updated = "2012-07-16T00:00:00+00:00"
**** CubicPower OpenStack Study **** def get_controller_extensions(self): controller = Controller(self.ext_mgr) extension = extensions.ControllerExtension(self, 'servers', controller) return [extension]
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