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OpenStack Study: server_start_stop.py**** CubicPower OpenStack Study ****
# Copyright 2012 Midokura Japan K.K. # # 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 from nova.api.openstack import extensions from nova.api.openstack import wsgi from nova import compute from nova import exception from nova.objects import instance as instance_obj from nova.openstack.common.gettextutils import _ from nova.openstack.common import log as logging LOG = logging.getLogger(__name__)
**** CubicPower OpenStack Study **** class ServerStartStopActionController(wsgi.Controller):
**** CubicPower OpenStack Study **** def __init__(self, *args, **kwargs): super(ServerStartStopActionController, self).__init__(*args, **kwargs) self.compute_api = compute.API()
**** CubicPower OpenStack Study **** def _get_instance(self, context, instance_uuid): try: attrs = ['system_metadata', 'metadata'] return instance_obj.Instance.get_by_uuid(context, instance_uuid, expected_attrs=attrs) except exception.NotFound: msg = _("Instance not found") raise webob.exc.HTTPNotFound(explanation=msg) @wsgi.action('os-start')
**** CubicPower OpenStack Study **** def _start_server(self, req, id, body): """Start an instance.""" context = req.environ['nova.context'] instance = self._get_instance(context, id) extensions.check_compute_policy(context, 'start', instance) LOG.debug(_('start instance'), instance=instance) try: self.compute_api.start(context, instance) except (exception.InstanceNotReady, exception.InstanceIsLocked, exception.InstanceInvalidState) as e: raise webob.exc.HTTPConflict(explanation=e.format_message()) return webob.Response(status_int=202) @wsgi.action('os-stop')
**** CubicPower OpenStack Study **** def _stop_server(self, req, id, body): """Stop an instance.""" context = req.environ['nova.context'] instance = self._get_instance(context, id) extensions.check_compute_policy(context, 'stop', instance) LOG.debug(_('stop instance'), instance=instance) try: self.compute_api.stop(context, instance) except (exception.InstanceNotReady, exception.InstanceIsLocked, exception.InstanceInvalidState) as e: raise webob.exc.HTTPConflict(explanation=e.format_message()) return webob.Response(status_int=202)
**** CubicPower OpenStack Study **** class Server_start_stop(extensions.ExtensionDescriptor): """Start/Stop instance compute API support.""" name = "ServerStartStop" alias = "os-server-start-stop" namespace = "http://docs.openstack.org/compute/ext/servers/api/v1.1" updated = "2012-01-23T00:00:00+00:00"
**** CubicPower OpenStack Study **** def get_controller_extensions(self): controller = ServerStartStopActionController() extension = extensions.ControllerExtension(self, 'servers', controller) return [extension]
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