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extended_server_attributes.py
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extended_server_attributes.py
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# Copyright 2012 OpenStack Foundation
#
# 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 Server Attributes API extension."""
from nova.api.openstack import api_version_request
from nova.api.openstack import extensions
from nova.api.openstack import wsgi
ALIAS = "os-extended-server-attributes"
authorize = extensions.os_compute_soft_authorizer(ALIAS)
class ExtendedServerAttributesController(wsgi.Controller):
def __init__(self, *args, **kwargs):
super(ExtendedServerAttributesController, self).__init__(*args,
**kwargs)
self.api_version_2_3 = api_version_request.APIVersionRequest('2.3')
def _extend_server(self, context, server, instance, requested_version):
key = "OS-EXT-SRV-ATTR:hypervisor_hostname"
server[key] = instance.node
properties = ['host', 'name']
if requested_version >= self.api_version_2_3:
properties += ['reservation_id', 'launch_index',
'hostname', 'kernel_id', 'ramdisk_id',
'root_device_name', 'user_data']
for attr in properties:
if attr == 'name':
key = "OS-EXT-SRV-ATTR:instance_%s" % attr
else:
key = "OS-EXT-SRV-ATTR:%s" % attr
server[key] = instance[attr]
@wsgi.extends
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'])
# server['id'] is guaranteed to be in the cache due to
# the core API adding it in its 'show' method.
self._extend_server(context, server, db_instance,
req.api_version_request)
@wsgi.extends
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'])
# server['id'] is guaranteed to be in the cache due to
# the core API adding it in its 'detail' method.
self._extend_server(context, server, db_instance,
req.api_version_request)
class ExtendedServerAttributes(extensions.V3APIExtensionBase):
"""Extended Server Attributes support."""
name = "ExtendedServerAttributes"
alias = ALIAS
version = 1
def get_controller_extensions(self):
controller = ExtendedServerAttributesController()
extension = extensions.ControllerExtension(self, 'servers', controller)
return [extension]
def get_resources(self):
return []