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OpenStack Study: pause_server.py**** CubicPower OpenStack Study ****
# Copyright 2011 OpenStack Foundation # Copyright 2013 IBM Corp. # # 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 webob import exc from nova.api.openstack import common from nova.api.openstack import extensions from nova.api.openstack import wsgi from nova import compute from nova import exception from nova.openstack.common import log as logging LOG = logging.getLogger(__name__) ALIAS = "os-pause-server"
**** CubicPower OpenStack Study **** def authorize(context, action_name): action = 'v3:%s:%s' % (ALIAS, action_name) extensions.extension_authorizer('compute', action)(context)
**** CubicPower OpenStack Study **** class PauseServerController(wsgi.Controller):
**** CubicPower OpenStack Study **** def __init__(self, *args, **kwargs): super(PauseServerController, self).__init__(*args, **kwargs) self.compute_api = compute.API() @extensions.expected_errors((404, 409)) @wsgi.action('pause')
**** CubicPower OpenStack Study **** def _pause(self, req, id, body): """Permit Admins to pause the server.""" ctxt = req.environ['nova.context'] authorize(ctxt, 'pause') try: server = common.get_instance(self.compute_api, ctxt, id, want_objects=True) self.compute_api.pause(ctxt, server) 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, 'pause') return webob.Response(status_int=202) @extensions.expected_errors((404, 409)) @wsgi.action('unpause')
**** CubicPower OpenStack Study **** def _unpause(self, req, id, body): """Permit Admins to unpause the server.""" ctxt = req.environ['nova.context'] authorize(ctxt, 'unpause') try: server = common.get_instance(self.compute_api, ctxt, id, want_objects=True) self.compute_api.unpause(ctxt, server) 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, 'unpause') return webob.Response(status_int=202)
**** CubicPower OpenStack Study **** class PauseServer(extensions.V3APIExtensionBase): """Enable pause/unpause server actions.""" name = "PauseServer" alias = ALIAS namespace = "http://docs.openstack.org/compute/ext/%s/api/v3" % ALIAS version = 1
**** CubicPower OpenStack Study **** def get_controller_extensions(self): controller = PauseServerController() extension = extensions.ControllerExtension(self, 'servers', controller) return [extension]
**** CubicPower OpenStack Study **** def get_resources(self): return []
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