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OpenStack Study: extended_availability_zone.py**** CubicPower OpenStack Study ****
# Copyright 2013 Netease, LLC. # 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. """The Extended Availability Zone Status API extension.""" from nova.api.openstack import extensions from nova.api.openstack import wsgi from nova import availability_zones as avail_zone ALIAS = "os-extended-availability-zone" authorize = extensions.soft_extension_authorizer('compute', 'v3:' + ALIAS)
**** CubicPower OpenStack Study **** class ExtendedAZController(wsgi.Controller):
**** CubicPower OpenStack Study **** def _extend_server(self, context, server, instance): key = "%s:availability_zone" % ExtendedAvailabilityZone.alias az = avail_zone.get_instance_availability_zone(context, instance) if not az and instance.get('availability_zone'): # Likely hasn't reached a viable compute node yet so give back the # desired availability_zone that *may* exist in the instance # record itself. az = instance['availability_zone'] server[key] = az @wsgi.extends
**** CubicPower OpenStack Study **** def show(self, req, resp_obj, id): context = req.environ['nova.context'] if authorize(context): server = resp_obj.obj['server'] db_instance = req.get_db_instance(server['id']) self._extend_server(context, server, db_instance) @wsgi.extends
**** CubicPower OpenStack Study **** def detail(self, req, resp_obj): context = req.environ['nova.context'] if authorize(context): servers = list(resp_obj.obj['servers']) for server in servers: db_instance = req.get_db_instance(server['id']) self._extend_server(context, server, db_instance)
**** CubicPower OpenStack Study **** class ExtendedAvailabilityZone(extensions.V3APIExtensionBase): """Extended Server Attributes support.""" name = "ExtendedAvailabilityZone" alias = ALIAS version = 1
**** CubicPower OpenStack Study **** def get_controller_extensions(self): controller = ExtendedAZController() extension = extensions.ControllerExtension(self, 'servers', controller) return [extension]
**** CubicPower OpenStack Study **** def get_resources(self): return []
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