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OpenStack Study: volume_manage.py**** CubicPower OpenStack Study ****
# # 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. from oslo.config import cfg from webob import exc from cinder.api import extensions from cinder.api.openstack import wsgi from cinder.api.v2.views import volumes as volume_views from cinder.api.v2 import volumes from cinder import exception from cinder.openstack.common import log as logging from cinder.openstack.common import uuidutils from cinder import utils from cinder import volume as cinder_volume from cinder.volume import volume_types LOG = logging.getLogger(__name__) CONF = cfg.CONF authorize = extensions.extension_authorizer('volume', 'volume_manage')
**** CubicPower OpenStack Study **** class VolumeManageController(wsgi.Controller): """The /os-volume-manage controller for the OpenStack API.""" _view_builder_class = volume_views.ViewBuilder
**** CubicPower OpenStack Study **** def __init__(self, *args, **kwargs): super(VolumeManageController, self).__init__(*args, **kwargs) self.volume_api = cinder_volume.API() @wsgi.response(202) @wsgi.serializers(xml=volumes.VolumeTemplate) @wsgi.deserializers(xml=volumes.CreateDeserializer)
**** CubicPower OpenStack Study **** def create(self, req, body): """Instruct Cinder to manage a storage object. Manages an existing backend storage object (e.g. a Linux logical volume or a SAN disk) by creating the Cinder objects required to manage it, and possibly renaming the backend storage object (driver dependent) From an API perspective, this operation behaves very much like a volume creation operation, except that properties such as image, snapshot and volume references don't make sense, because we are taking an existing storage object into Cinder management. Required HTTP Body: { 'volume': { 'host': 'ref': } } See the appropriate Cinder drivers' implementations of the manage_volume method to find out the accepted format of 'ref'. This API call will return with an error if any of the above elements are missing from the request, or if the 'host' element refers to a cinder host that is not registered. The volume will later enter the error state if it is discovered that 'ref' is bad. Optional elements to 'volume' are: name A name for the new volume. description A description for the new volume. volume_type ID or name of a volume type to associate with the new Cinder volume. Does not necessarily guarantee that the managed volume will have the properties described in the volume_type. The driver may choose to fail if it identifies that the specified volume_type is not compatible with the backend storage object. metadata Key/value pairs to be associated with the new volume. availability_zone The availability zone to associate with the new volume. """ context = req.environ['cinder.context'] authorize(context) if not self.is_valid_body(body, 'volume'): msg = _("Missing required element '%s' in request body") % 'volume' raise exc.HTTPBadRequest(explanation=msg) volume = body['volume'] # Check that the required keys are present, return an error if they # are not. required_keys = set(['ref', 'host']) missing_keys = list(required_keys - set(volume.keys())) if missing_keys: msg = _("The following elements are required: %s") % \ ', '.join(missing_keys) raise exc.HTTPBadRequest(explanation=msg) LOG.debug('Manage volume request body: %s', body) kwargs = {} req_volume_type = volume.get('volume_type', None) if req_volume_type: try: if not uuidutils.is_uuid_like(req_volume_type): kwargs['volume_type'] = \ volume_types.get_volume_type_by_name( context, req_volume_type) else: kwargs['volume_type'] = volume_types.get_volume_type( context, req_volume_type) except exception.VolumeTypeNotFound: msg = _("Volume type not found.") raise exc.HTTPNotFound(explanation=msg) else: kwargs['volume_type'] = {} kwargs['name'] = volume.get('name', None) kwargs['description'] = volume.get('description', None) kwargs['metadata'] = volume.get('metadata', None) kwargs['availability_zone'] = volume.get('availability_zone', None) try: new_volume = self.volume_api.manage_existing(context, volume['host'], volume['ref'], **kwargs) except exception.ServiceNotFound: msg = _("Service not found.") raise exc.HTTPNotFound(explanation=msg) new_volume = dict(new_volume.iteritems()) utils.add_visible_admin_metadata(context, new_volume, self.volume_api) return self._view_builder.detail(req, new_volume)
**** CubicPower OpenStack Study **** class Volume_manage(extensions.ExtensionDescriptor): """Allows existing backend storage to be 'managed' by Cinder.""" name = 'VolumeManage' alias = 'os-volume-manage' namespace = ('http://docs.openstack.org/volume/ext/' 'os-volume-manage/api/v1') updated = '2014-02-10T00:00:00+00:00'
**** CubicPower OpenStack Study **** def get_resources(self): controller = VolumeManageController() res = extensions.ResourceExtension(Volume_manage.alias, controller) return [res]
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