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
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
|
# Copyright (c) 2014 VMware, Inc.
# 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.
"""
Common classes that provide access to vSphere services.
"""
import httplib
import logging
import urllib2
import netaddr
import six
import suds
from oslo.vmware import exceptions
from oslo.vmware.openstack.common.gettextutils import _
from oslo.vmware.openstack.common.gettextutils import _LE
from oslo.vmware import vim_util
ADDRESS_IN_USE_ERROR = 'Address already in use'
CONN_ABORT_ERROR = 'Software caused connection abort'
RESP_NOT_XML_ERROR = 'Response is "text/html", not "text/xml"'
SERVICE_INSTANCE = 'ServiceInstance'
LOG = logging.getLogger(__name__)
class ServiceMessagePlugin(suds.plugin.MessagePlugin):
"""Suds plug-in handling some special cases while calling VI SDK."""
def add_attribute_for_value(self, node):
"""Helper to handle AnyType.
Suds does not handle AnyType properly. But VI SDK requires type
attribute to be set when AnyType is used.
:param node: XML value node
"""
if node.name == 'value':
node.set('xsi:type', 'xsd:string')
def marshalled(self, context):
"""Modifies the envelope document before it is sent.
This method provides the plug-in with the opportunity to prune empty
nodes and fix nodes before sending it to the server.
:param context: send context
"""
# Suds builds the entire request object based on the WSDL schema.
# VI SDK throws server errors if optional SOAP nodes are sent
# without values; e.g., <test/> as opposed to <test>test</test>.
context.envelope.prune()
context.envelope.walk(self.add_attribute_for_value)
class Service(object):
"""Base class containing common functionality for invoking vSphere
services
"""
def __init__(self, wsdl_url=None, soap_url=None):
self.wsdl_url = wsdl_url
self.soap_url = soap_url
LOG.debug("Creating suds client with soap_url='%s' and wsdl_url='%s'",
self.soap_url, self.wsdl_url)
self.client = suds.client.Client(self.wsdl_url,
location=self.soap_url,
plugins=[ServiceMessagePlugin()])
self._service_content = None
@staticmethod
def build_base_url(protocol, host, port):
proto_str = '%s://' % protocol
host_str = '[%s]' % host if netaddr.valid_ipv6(host) else host
port_str = '' if port is None else ':%d' % port
return proto_str + host_str + port_str
@staticmethod
def _retrieve_properties_ex_fault_checker(response):
"""Checks the RetrievePropertiesEx API response for errors.
Certain faults are sent in the SOAP body as a property of missingSet.
This method raises VimFaultException when a fault is found in the
response.
:param response: response from RetrievePropertiesEx API call
:raises: VimFaultException
"""
# TODO(rgerganov) this method doesn't belong here because this fault
# checking is specific to the Vim service. We should come up with
# a new design that allows extensible fault checking and have the
# service specific parts in the corresponding child classes
LOG.debug("Checking RetrievePropertiesEx API response for faults.")
fault_list = []
if not response:
# This is the case when the session has timed out. ESX SOAP
# server sends an empty RetrievePropertiesExResponse. Normally
# missingSet in the response objects has the specifics about
# the error, but that's not the case with a timed out idle
# session. It is as bad as a terminated session for we cannot
# use the session. Therefore setting fault to NotAuthenticated
# fault.
LOG.debug("RetrievePropertiesEx API response is empty; setting "
"fault to %s.",
exceptions.NOT_AUTHENTICATED)
fault_list = [exceptions.NOT_AUTHENTICATED]
else:
for obj_cont in response.objects:
if hasattr(obj_cont, 'missingSet'):
for missing_elem in obj_cont.missingSet:
fault_type = missing_elem.fault.fault.__class__
fault_list.append(fault_type.__name__)
if fault_list:
LOG.error(_LE("Faults %s found in RetrievePropertiesEx API "
"response."),
fault_list)
raise exceptions.VimFaultException(fault_list,
_("Error occurred while calling"
" RetrievePropertiesEx."))
LOG.debug("No faults found in RetrievePropertiesEx API response.")
@property
def service_content(self):
if self._service_content is None:
self._service_content = self.retrieve_service_content()
return self._service_content
def get_http_cookie(self):
"""Return the vCenter session cookie."""
cookies = self.client.options.transport.cookiejar
for cookie in cookies:
if cookie.name.lower() == 'vmware_soap_session':
return cookie.value
def __getattr__(self, attr_name):
"""Returns the method to invoke API identified by param attr_name."""
def request_handler(managed_object, **kwargs):
"""Handler for vSphere API calls.
Invokes the API and parses the response for fault checking and
other errors.
:param managed_object: managed object reference argument of the
API call
:param kwargs: keyword arguments of the API call
:returns: response of the API call
:raises: VimException, VimFaultException, VimAttributeException,
VimSessionOverLoadException, VimConnectionException
"""
try:
if isinstance(managed_object, str):
# For strings, use string value for value and type
# of the managed object.
managed_object = vim_util.get_moref(managed_object,
managed_object)
if managed_object is None:
return
request = getattr(self.client.service, attr_name)
LOG.debug("Invoking %(attr_name)s on %(moref)s.",
{'attr_name': attr_name,
'moref': managed_object})
response = request(managed_object, **kwargs)
if (attr_name.lower() == 'retrievepropertiesex'):
Service._retrieve_properties_ex_fault_checker(response)
LOG.debug("Invocation of %(attr_name)s on %(moref)s "
"completed successfully.",
{'attr_name': attr_name,
'moref': managed_object})
return response
except exceptions.VimFaultException:
# Catch the VimFaultException that is raised by the fault
# check of the SOAP response.
raise
except suds.WebFault as excep:
doc = excep.document
fault_string = doc.childAtPath("/Envelope/Body/Fault/"
"faultstring").getText()
detail = doc.childAtPath('/Envelope/Body/Fault/detail')
fault_list = []
details = {}
if detail:
for fault in detail.getChildren():
fault_list.append(fault.get("type"))
for child in fault.getChildren():
details[child.name] = child.getText()
raise exceptions.VimFaultException(fault_list, fault_string,
excep, details)
except AttributeError as excep:
raise exceptions.VimAttributeException(
_("No such SOAP method %s.") % attr_name, excep)
except (httplib.CannotSendRequest,
httplib.ResponseNotReady,
httplib.CannotSendHeader) as excep:
raise exceptions.VimSessionOverLoadException(
_("httplib error in %s.") % attr_name, excep)
except (urllib2.URLError, urllib2.HTTPError) as excep:
raise exceptions.VimConnectionException(
_("urllib2 error in %s.") % attr_name, excep)
except Exception as excep:
# TODO(vbala) should catch specific exceptions and raise
# appropriate VimExceptions.
# Socket errors which need special handling; some of these
# might be caused by server API call overload.
if (six.text_type(excep).find(ADDRESS_IN_USE_ERROR) != -1 or
six.text_type(excep).find(CONN_ABORT_ERROR)) != -1:
raise exceptions.VimSessionOverLoadException(
_("Socket error in %s.") % attr_name, excep)
# Type error which needs special handling; it might be caused
# by server API call overload.
elif six.text_type(excep).find(RESP_NOT_XML_ERROR) != -1:
raise exceptions.VimSessionOverLoadException(
_("Type error in %s.") % attr_name, excep)
else:
raise exceptions.VimException(
_("Exception in %s.") % attr_name, excep)
return request_handler
def __repr__(self):
return "vSphere object"
def __str__(self):
return "vSphere object"
|
