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
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
|
# vi: ts=4 expandtab
#
# Copyright (C) 2009-2010 Canonical Ltd.
# Copyright (C) 2012 Hewlett-Packard Development Company, L.P.
# Copyright (C) 2012 Yahoo! Inc.
#
# Author: Scott Moser <scott.moser@canonical.com>
# Author: Juerg Hafliger <juerg.haefliger@hp.com>
# Author: Joshua Harlow <harlowja@yahoo-inc.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/>.
import errno
import os
import os.path
import subprocess
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'
MEDIA_DIR = '/media/userdata'
# Deltacloud file name contains deltacloud. Those not using
# Deltacloud but instead instrumenting the injection, could
# drop deltacloud from the file name.
DELTACLOUD_USER_DATA_FILE = MEDIA_DIR + '/deltacloud-user-data.txt'
USER_DATA_FILE = MEDIA_DIR + '/user-data.txt'
'''
Shell command lists
'''
CMD_DMI_SYSTEM = ['/usr/sbin/dmidecode', '--string', 'system-product-name']
CMD_PROBE_FLOPPY = ['/sbin/modprobe', 'floppy']
CMD_MNT_FLOPPY = ['/bin/mount', '/dev/fd0', MEDIA_DIR]
CMD_MNT_CDROM = ['/bin/mount', '/dev/cdrom', MEDIA_DIR]
META_DATA_NOT_SUPPORTED = {
'block-device-mapping' : {},
'instance-id' : 455,
'local-hostname' : 'localhost',
'placement': {},
}
class DataSourceAltCloud(sources.DataSource):
def __init__(self, sys_cfg, distro, paths):
sources.DataSource.__init__(self, sys_cfg, distro, paths)
self.dsmode = 'local'
self.seed = None
self.cmdline_id = "ds=nocloud"
self.seed_dir = os.path.join(paths.seed_dir, 'nocloud')
self.supported_seed_starts = ("/", "file://")
def __str__(self):
mstr = "%s [seed=%s][dsmode=%s]" % (util.obj_name(self),
self.seed, self.dsmode)
return mstr
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:
dmidecode --string system-product-name
On VMWare/vSphere dmidecode returns: RHEV Hypervisor
On VMWare/vSphere dmidecode returns: VMware Virtual Platform
Input:
None
Returns:
One of the following strings:
'RHEV', 'VSPHERE' or 'UNKNOWN'
'''
cmd = CMD_DMI_SYSTEM
try:
(cmd_out, _err) = util.subp(cmd)
except ProcessExecutionError, _err:
LOG.debug(('Failed command: %s\n%s') % \
(' '.join(cmd), _err.message))
return 'UNKNOWN'
except OSError, _err:
LOG.debug(('Failed command: %s\n%s') % \
(' '.join(cmd), _err.message))
return 'UNKNOWN'
if cmd_out.upper().startswith('RHEV'):
return 'RHEV'
if cmd_out.upper().startswith('VMWARE'):
return 'VSPHERE'
return 'UNKNOWN'
def get_data(self):
'''
Description:
User Data is passed to the launching instance which
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_info = open(CLOUD_INFO_FILE)
cloud_type = cloud_info.read().strip().upper()
cloud_info.close()
except:
util.logexc(LOG, 'Unable to access cloud info file.')
return False
else:
cloud_type = self.get_cloud_type()
LOG.debug('cloud_type: ' + str(cloud_type))
if 'RHEV' in cloud_type:
return self.user_data_rhevm()
elif 'VSPHERE' in cloud_type:
return self.user_data_vsphere()
else:
# there was no recognized alternate cloud type.
# suggesting this handler should not be used.
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
mkdir <MEDIA_DIR>
mount /dev/fd0 <MEDIA_DIR>
mount /dev/fd0 <MEDIA_DIR> # NOTE: -> /dev/
read <MEDIA_DIR>/<USER_DATA_FILE>
'''
# modprobe floppy
try:
cmd = CMD_PROBE_FLOPPY
(cmd_out, _err) = util.subp(cmd)
except ProcessExecutionError, _err:
util.logexc(LOG, (('Failed command: %s\n%s') % \
(' '.join(cmd), _err.message)))
return False
except OSError, _err:
util.logexc(LOG, (('Failed command: %s\n%s') % \
(' '.join(cmd), _err.message)))
return False
# mkdir <MEDIA_DIR> dir just in case it isn't already.
try:
os.makedirs(MEDIA_DIR)
except OSError, (errno, strerror):
if errno is not 17:
LOG.debug(('makedirs(<MEDIA_DIR>) failed: %s \nError: %s') % \
(errno, strerror))
return False
# mount /dev/fd0 <MEDIA_DIR>
try:
cmd = CMD_MNT_FLOPPY
(cmd_out, _err) = util.subp(cmd)
except ProcessExecutionError, _err:
# Ignore failure: already mounted
if 'ALREADY MOUNTED' not in _err.message.upper():
util.logexc(LOG, (('Failed command: %s\n%s') % \
(' '.join(cmd), _err.message)))
return False
except OSError, _err:
util.logexc(LOG, (('Failed command: %s\n%s') % \
(' '.join(cmd), _err.message)))
return False
# This could be done using "with open()" but that's not available
# in Python 2.4 as used on RHEL5
# First try DELTACLOUD_USER_DATA_FILE. If that fails then try
# USER_DATA_FILE.
try:
user_data_file = open(DELTACLOUD_USER_DATA_FILE, 'r')
user_data = user_data_file.read().strip()
user_data_file.close()
except:
try:
user_data_file = open(USER_DATA_FILE, 'r')
user_data = user_data_file.read().strip()
user_data_file.close()
except:
util.logexc(LOG, ('Failed accessing RHEVm user data file.'))
try:
user_data_file.close()
except:
pass
return False
self.userdata_raw = user_data
self.metadata = META_DATA_NOT_SUPPORTED
return True
def user_data_vsphere(self):
'''
VSphere specific userdata read
If on vSphere the user data will be contained on the
floppy device in file <USER_DATA_FILE>
To access it:
mkdir <MEDIA_DIR> dir just in case it isn't already.
mount /dev/cdrom <MEDIA_DIR> # NOTE: -> /dev/cdrom
read <MEDIA_DIR>/<USER_DATA_FILE>
'''
# mkdir <MEDIA_DIR> dir just in case it isn't already.
try:
os.makedirs(MEDIA_DIR)
except OSError, (errno, strerror):
if errno is not 17:
LOG.debug(('makedirs(<MEDIA_DIR>) failed: %s \nError: %s') % \
(errno, strerror))
return False
# mount /dev/cdrom <MEDIA_DIR>
try:
cmd = CMD_MNT_CDROM
(cmd_out, _err) = util.subp(cmd)
except ProcessExecutionError, _err:
# Ignore failure: already mounted
if 'ALREADY MOUNTED' not in _err.message.upper():
LOG.debug(('Failed command: %s\n%s') % \
(' '.join(cmd), _err.message))
return False
except OSError, _err:
LOG.debug(('Failed command: %s\n%s') % \
(' '.join(cmd), _err.message))
return False
# This could be done using "with open()" but that's not available
# in Python 2.4 as used on RHEL5
# First try DELTACLOUD_USER_DATA_FILE. If that fails then try
# USER_DATA_FILE.
try:
user_data_file = open(DELTACLOUD_USER_DATA_FILE, 'r')
user_data = user_data_file.read().strip()
user_data_file.close()
except:
try:
user_data_file = open(USER_DATA_FILE, 'r')
user_data = user_data_file.read().strip()
user_data_file.close()
except:
LOG.debug('Failed accessing vSphere user data file.')
try:
user_data_file.close()
except:
pass
return False
self.userdata_raw = user_data
self.metadata = META_DATA_NOT_SUPPORTED
return True
# Used to match classes to dependencies
datasources = [
(DataSourceAltCloud, (sources.DEP_FILESYSTEM, )),
]
# Return a list of data sources that match this set of dependencies
def get_datasource_list(depends):
return sources.list_from_depends(depends, datasources)
|
