1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
|
# Copyright 2012 OpenStack, LLC.
#
# 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
from nova import compute
from nova import config
from nova import db
from nova.openstack.common import log as logging
LOG = logging.getLogger(__name__)
authorize = extensions.soft_extension_authorizer('compute',
'extended_server_attributes')
class ExtendedServerAttributesController(wsgi.Controller):
def __init__(self, *args, **kwargs):
super(ExtendedServerAttributesController, self).__init__(*args,
**kwargs)
self.compute_api = compute.API()
def _get_hypervisor_hostname(self, context, instance):
compute_node = db.compute_node_get_by_host(context, instance["host"])
try:
return compute_node["hypervisor_hostname"]
except TypeError:
return
def _extend_server(self, context, server, instance):
key = "%s:hypervisor_hostname" % Extended_server_attributes.alias
server[key] = self._get_hypervisor_hostname(context, instance)
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 = "2011-11-03T00:00:00+00:00"
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})
|
