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OpenStack Study: shelve.py**** CubicPower OpenStack Study ****
# Copyright 2013 Rackspace Hosting # # 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 shelved mode extension.""" import webob from webob import exc from nova.api.openstack import common from nova.api.openstack import extensions as exts from nova.api.openstack import wsgi from nova import compute from nova import exception from nova.openstack.common.gettextutils import _ auth_shelve = exts.extension_authorizer('compute', 'shelve') auth_shelve_offload = exts.extension_authorizer('compute', 'shelveOffload') auth_unshelve = exts.extension_authorizer('compute', 'unshelve')
**** CubicPower OpenStack Study **** class ShelveController(wsgi.Controller):
**** CubicPower OpenStack Study **** def __init__(self, *args, **kwargs): super(ShelveController, self).__init__(*args, **kwargs) self.compute_api = compute.API()
**** CubicPower OpenStack Study **** def _get_instance(self, context, instance_id): try: return self.compute_api.get(context, instance_id, want_objects=True) except exception.InstanceNotFound: msg = _("Server not found") raise exc.HTTPNotFound(explanation=msg) @wsgi.action('shelve')
**** CubicPower OpenStack Study **** def _shelve(self, req, id, body): """Move an instance into shelved mode.""" context = req.environ["nova.context"] auth_shelve(context) instance = self._get_instance(context, id) try: self.compute_api.shelve(context, instance) except exception.InstanceIsLocked as e: raise exc.HTTPConflict(explanation=e.format_message()) except exception.InstanceInvalidState as state_error: common.raise_http_conflict_for_instance_invalid_state(state_error, 'shelve') return webob.Response(status_int=202) @wsgi.action('shelveOffload')
**** CubicPower OpenStack Study **** def _shelve_offload(self, req, id, body): """Force removal of a shelved instance from the compute node.""" context = req.environ["nova.context"] auth_shelve_offload(context) instance = self._get_instance(context, id) try: self.compute_api.shelve_offload(context, instance) except exception.InstanceIsLocked as e: raise exc.HTTPConflict(explanation=e.format_message()) except exception.InstanceInvalidState as state_error: common.raise_http_conflict_for_instance_invalid_state(state_error, 'shelveOffload') return webob.Response(status_int=202) @wsgi.action('unshelve')
**** CubicPower OpenStack Study **** def _unshelve(self, req, id, body): """Restore an instance from shelved mode.""" context = req.environ["nova.context"] auth_unshelve(context) instance = self._get_instance(context, id) try: self.compute_api.unshelve(context, instance) except exception.InstanceIsLocked as e: raise exc.HTTPConflict(explanation=e.format_message()) except exception.InstanceInvalidState as state_error: common.raise_http_conflict_for_instance_invalid_state(state_error, 'unshelve') return webob.Response(status_int=202)
**** CubicPower OpenStack Study **** class Shelve(exts.ExtensionDescriptor): """Instance shelve mode.""" name = "Shelve" alias = "os-shelve" namespace = "http://docs.openstack.org/compute/ext/shelve/api/v1.1" updated = "2013-04-06T00:00:00+00:00"
**** CubicPower OpenStack Study **** def get_controller_extensions(self): controller = ShelveController() extension = exts.ControllerExtension(self, 'servers', controller) return [extension]
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