123 lines
4.9 KiB
Python
123 lines
4.9 KiB
Python
# Copyright 2012 OpenStack, LLC.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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"""The Extended Server Attributes API extension."""
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from nova.api.openstack import extensions
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from nova.api.openstack import wsgi
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from nova.api.openstack import xmlutil
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from nova import compute
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from nova import db
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from nova.openstack.common import log as logging
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LOG = logging.getLogger(__name__)
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authorize = extensions.soft_extension_authorizer('compute',
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'extended_server_attributes')
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class ExtendedServerAttributesController(wsgi.Controller):
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def __init__(self, *args, **kwargs):
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super(ExtendedServerAttributesController, self).__init__(*args,
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**kwargs)
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self.compute_api = compute.API()
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def _get_hypervisor_hostname(self, context, instance):
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compute_node = db.compute_node_get_by_host(context, instance["host"])
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try:
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return compute_node["hypervisor_hostname"]
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except TypeError:
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return
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def _extend_server(self, context, server, instance):
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key = "%s:hypervisor_hostname" % Extended_server_attributes.alias
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server[key] = self._get_hypervisor_hostname(context, instance)
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for attr in ['host', 'name']:
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if attr == 'name':
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key = "%s:instance_%s" % (Extended_server_attributes.alias,
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attr)
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else:
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key = "%s:%s" % (Extended_server_attributes.alias, attr)
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server[key] = instance[attr]
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@wsgi.extends
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def show(self, req, resp_obj, id):
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context = req.environ['nova.context']
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if authorize(context):
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# Attach our slave template to the response object
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resp_obj.attach(xml=ExtendedServerAttributeTemplate())
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server = resp_obj.obj['server']
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db_instance = req.get_db_instance(server['id'])
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# server['id'] is guaranteed to be in the cache due to
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# the core API adding it in its 'show' method.
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self._extend_server(context, server, db_instance)
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@wsgi.extends
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def detail(self, req, resp_obj):
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context = req.environ['nova.context']
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if authorize(context):
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# Attach our slave template to the response object
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resp_obj.attach(xml=ExtendedServerAttributesTemplate())
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servers = list(resp_obj.obj['servers'])
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for server in servers:
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db_instance = req.get_db_instance(server['id'])
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# server['id'] is guaranteed to be in the cache due to
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# the core API adding it in its 'detail' method.
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self._extend_server(context, server, db_instance)
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class Extended_server_attributes(extensions.ExtensionDescriptor):
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"""Extended Server Attributes support."""
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name = "ExtendedServerAttributes"
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alias = "OS-EXT-SRV-ATTR"
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namespace = ("http://docs.openstack.org/compute/ext/"
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"extended_status/api/v1.1")
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updated = "2011-11-03T00:00:00+00:00"
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def get_controller_extensions(self):
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controller = ExtendedServerAttributesController()
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extension = extensions.ControllerExtension(self, 'servers', controller)
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return [extension]
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def make_server(elem):
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elem.set('{%s}instance_name' % Extended_server_attributes.namespace,
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'%s:instance_name' % Extended_server_attributes.alias)
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elem.set('{%s}host' % Extended_server_attributes.namespace,
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'%s:host' % Extended_server_attributes.alias)
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elem.set('{%s}hypervisor_hostname' % Extended_server_attributes.namespace,
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'%s:hypervisor_hostname' % Extended_server_attributes.alias)
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class ExtendedServerAttributeTemplate(xmlutil.TemplateBuilder):
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def construct(self):
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root = xmlutil.TemplateElement('server', selector='server')
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make_server(root)
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alias = Extended_server_attributes.alias
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namespace = Extended_server_attributes.namespace
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return xmlutil.SlaveTemplate(root, 1, nsmap={alias: namespace})
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class ExtendedServerAttributesTemplate(xmlutil.TemplateBuilder):
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def construct(self):
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root = xmlutil.TemplateElement('servers')
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elem = xmlutil.SubTemplateElement(root, 'server', selector='servers')
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make_server(elem)
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alias = Extended_server_attributes.alias
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namespace = Extended_server_attributes.namespace
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return xmlutil.SlaveTemplate(root, 1, nsmap={alias: namespace})
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