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
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
|
# vi: ts=4 expandtab
#
# Copyright (C) 2009-2010 Canonical Ltd.
# Copyright (C) 2012, 2013 Hewlett-Packard Development Company, L.P.
# Copyright (C) 2012 Yahoo! Inc.
#
# Author: Joe VLcek <JVLcek@RedHat.com>
# Author: Juerg Haefliger <juerg.haefliger@hp.com>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 3, as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
'''
This file contains code used to gather the user data passed to an
instance on RHEVm and vSphere.
'''
import errno
import os
import os.path
from cloudinit import log as logging
from cloudinit import sources
from cloudinit import util
from cloudinit.util import ProcessExecutionError
LOG = logging.getLogger(__name__)
# Needed file paths
CLOUD_INFO_FILE = '/etc/sysconfig/cloud-info'
# Shell command lists
CMD_PROBE_FLOPPY = ['/sbin/modprobe', 'floppy']
CMD_UDEVADM_SETTLE = ['/sbin/udevadm', 'settle', '--timeout=5']
META_DATA_NOT_SUPPORTED = {
'block-device-mapping': {},
'instance-id': 455,
'local-hostname': 'localhost',
'placement': {},
}
def read_user_data_callback(mount_dir):
'''
Description:
This callback will be applied by util.mount_cb() on the mounted
file.
Deltacloud file name contains deltacloud. Those not using
Deltacloud but instead instrumenting the injection, could
drop deltacloud from the file name.
Input:
mount_dir - Mount directory
Returns:
User Data
'''
deltacloud_user_data_file = mount_dir + '/deltacloud-user-data.txt'
user_data_file = mount_dir + '/user-data.txt'
# First try deltacloud_user_data_file. On failure try user_data_file.
try:
user_data = util.load_file(deltacloud_user_data_file).strip()
except IOError:
try:
user_data = util.load_file(user_data_file).strip()
except IOError:
util.logexc(LOG, 'Failed accessing user data file.')
return None
return user_data
class DataSourceAltCloud(sources.DataSource):
def __init__(self, sys_cfg, distro, paths):
sources.DataSource.__init__(self, sys_cfg, distro, paths)
self.seed = None
self.supported_seed_starts = ("/", "file://")
def __str__(self):
root = sources.DataSource.__str__(self)
return "%s [seed=%s]" % (root, self.seed)
def get_cloud_type(self):
'''
Description:
Get the type for the cloud back end this instance is running on
by examining the string returned by reading the dmi data.
Input:
None
Returns:
One of the following strings:
'RHEV', 'VSPHERE' or 'UNKNOWN'
'''
system_name = util.read_dmi_data("system-product-name")
if not system_name:
return 'UNKNOWN'
sys_name = system_name.upper()
if sys_name.startswith('RHEV'):
return 'RHEV'
if sys_name.startswith('VMWARE'):
return 'VSPHERE'
return 'UNKNOWN'
def get_data(self):
'''
Description:
User Data is passed to the launching instance which
is used to perform instance configuration.
Cloud providers expose the user data differently.
It is necessary to determine which cloud provider
the current instance is running on to determine
how to access the user data. Images built with
image factory will contain a CLOUD_INFO_FILE which
contains a string identifying the cloud provider.
Images not built with Imagefactory will try to
determine what the cloud provider is based on system
information.
'''
LOG.debug('Invoked get_data()')
if os.path.exists(CLOUD_INFO_FILE):
try:
cloud_type = util.load_file(CLOUD_INFO_FILE).strip().upper()
except IOError:
util.logexc(LOG, 'Unable to access cloud info file at %s.',
CLOUD_INFO_FILE)
return False
else:
cloud_type = self.get_cloud_type()
LOG.debug('cloud_type: ' + str(cloud_type))
if 'RHEV' in cloud_type:
if self.user_data_rhevm():
return True
elif 'VSPHERE' in cloud_type:
if self.user_data_vsphere():
return True
else:
# there was no recognized alternate cloud type
# indicating this handler should not be used.
return False
# No user data found
util.logexc(LOG, 'Failed accessing user data.')
return False
def user_data_rhevm(self):
'''
RHEVM specific userdata read
If on RHEV-M the user data will be contained on the
floppy device in file <user_data_file>
To access it:
modprobe floppy
Leverage util.mount_cb to:
mkdir <tmp mount dir>
mount /dev/fd0 <tmp mount dir>
The call back passed to util.mount_cb will do:
read <tmp mount dir>/<user_data_file>
'''
return_str = None
# modprobe floppy
try:
cmd = CMD_PROBE_FLOPPY
(cmd_out, _err) = util.subp(cmd)
LOG.debug(('Command: %s\nOutput%s') % (' '.join(cmd), cmd_out))
except ProcessExecutionError as _err:
util.logexc(LOG, 'Failed command: %s\n%s', ' '.join(cmd),
_err.message)
return False
except OSError as _err:
util.logexc(LOG, 'Failed command: %s\n%s', ' '.join(cmd), _err)
return False
floppy_dev = '/dev/fd0'
# udevadm settle for floppy device
try:
cmd = CMD_UDEVADM_SETTLE
cmd.append('--exit-if-exists=' + floppy_dev)
(cmd_out, _err) = util.subp(cmd)
LOG.debug(('Command: %s\nOutput%s') % (' '.join(cmd), cmd_out))
except ProcessExecutionError as _err:
util.logexc(LOG, 'Failed command: %s\n%s', ' '.join(cmd),
_err.message)
return False
except OSError as _err:
util.logexc(LOG, 'Failed command: %s\n%s', ' '.join(cmd),
_err.message)
return False
try:
return_str = util.mount_cb(floppy_dev, read_user_data_callback)
except OSError as err:
if err.errno != errno.ENOENT:
raise
except util.MountFailedError:
util.logexc(LOG, "Failed to mount %s when looking for user data",
floppy_dev)
self.userdata_raw = return_str
self.metadata = META_DATA_NOT_SUPPORTED
if return_str:
return True
else:
return False
def user_data_vsphere(self):
'''
vSphere specific userdata read
If on vSphere the user data will be contained on the
cdrom device in file <user_data_file>
To access it:
Leverage util.mount_cb to:
mkdir <tmp mount dir>
mount /dev/fd0 <tmp mount dir>
The call back passed to util.mount_cb will do:
read <tmp mount dir>/<user_data_file>
'''
return_str = None
cdrom_list = util.find_devs_with('LABEL=CDROM')
for cdrom_dev in cdrom_list:
try:
return_str = util.mount_cb(cdrom_dev, read_user_data_callback)
if return_str:
break
except OSError as err:
if err.errno != errno.ENOENT:
raise
except util.MountFailedError:
util.logexc(LOG, "Failed to mount %s when looking for user "
"data", cdrom_dev)
self.userdata_raw = return_str
self.metadata = META_DATA_NOT_SUPPORTED
if return_str:
return True
else:
return False
# Used to match classes to dependencies
# Source DataSourceAltCloud does not really depend on networking.
# In the future 'dsmode' like behavior can be added to offer user
# the ability to run before networking.
datasources = [
(DataSourceAltCloud, (sources.DEP_FILESYSTEM, sources.DEP_NETWORK)),
]
# Return a list of data sources that match this set of dependencies
def get_datasource_list(depends):
return sources.list_from_depends(depends, datasources)
|
