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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 extensions
from nova.api.openstack import wsgi
from nova.api.openstack import xmlutil
authorize = extensions.soft_extension_authorizer('compute',
'extended_server_attributes')
class ExtendedServerAttributesController(wsgi.Controller):
def _extend_server(self, context, server, instance):
key = "%s:hypervisor_hostname" % Extended_server_attributes.alias
server[key] = instance['node']
for attr in ['host', 'name']:
if attr == 'name':
key = "%s:instance_%s" % (Extended_server_attributes.alias,
attr)
else:
key = "%s:%s" % (Extended_server_attributes.alias, attr)
server[key] = instance[attr]
@wsgi.extends
def show(self, req, resp_obj, id):
context = req.environ['nova.context']
if authorize(context):
# Attach our slave template to the response object
resp_obj.attach(xml=ExtendedServerAttributeTemplate())
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)
@wsgi.extends
def detail(self, req, resp_obj):
context = req.environ['nova.context']
if authorize(context):
# Attach our slave template to the response object
resp_obj.attach(xml=ExtendedServerAttributesTemplate())
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)
class Extended_server_attributes(extensions.ExtensionDescriptor):
"""Extended Server Attributes support."""
name = "ExtendedServerAttributes"
alias = "OS-EXT-SRV-ATTR"
namespace = ("http://docs.openstack.org/compute/ext/"
"extended_status/api/v1.1")
updated = "2011-11-03T00:00:00Z"
def get_controller_extensions(self):
controller = ExtendedServerAttributesController()
extension = extensions.ControllerExtension(self, 'servers', controller)
return [extension]
def make_server(elem):
elem.set('{%s}instance_name' % Extended_server_attributes.namespace,
'%s:instance_name' % Extended_server_attributes.alias)
elem.set('{%s}host' % Extended_server_attributes.namespace,
'%s:host' % Extended_server_attributes.alias)
elem.set('{%s}hypervisor_hostname' % Extended_server_attributes.namespace,
'%s:hypervisor_hostname' % Extended_server_attributes.alias)
class ExtendedServerAttributeTemplate(xmlutil.TemplateBuilder):
def construct(self):
root = xmlutil.TemplateElement('server', selector='server')
make_server(root)
alias = Extended_server_attributes.alias
namespace = Extended_server_attributes.namespace
return xmlutil.SlaveTemplate(root, 1, nsmap={alias: namespace})
class ExtendedServerAttributesTemplate(xmlutil.TemplateBuilder):
def construct(self):
root = xmlutil.TemplateElement('servers')
elem = xmlutil.SubTemplateElement(root, 'server', selector='servers')
make_server(elem)
alias = Extended_server_attributes.alias
namespace = Extended_server_attributes.namespace
return xmlutil.SlaveTemplate(root, 1, nsmap={alias: namespace})
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