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
|
# vi: ts=4 expandtab
#
# Copyright (C) 2012 Canonical Ltd.
# Copyright (C) 2012 Cosmin Luta
# Copyright (C) 2012 Yahoo! Inc.
# Copyright (C) 2012 Gerard Dethier
# Copyright (C) 2013 Hewlett-Packard Development Company, L.P.
#
# Author: Cosmin Luta <q4break@gmail.com>
# Author: Scott Moser <scott.moser@canonical.com>
# Author: Joshua Harlow <harlowja@yahoo-inc.com>
# Author: Gerard Dethier <g.dethier@gmail.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/>.
import os
from socket import inet_ntoa
from struct import pack
import time
from cloudinit import ec2_utils as ec2
from cloudinit import log as logging
from cloudinit import sources
from cloudinit import url_helper as uhelp
from cloudinit import util
LOG = logging.getLogger(__name__)
class CloudStackPasswordServerClient(object):
"""
Implements password fetching from the CloudStack password server.
http://cloudstack-administration.readthedocs.org/
en/latest/templates.html#adding-password-management-to-your-templates
has documentation about the system. This implementation is following that
found at
https://github.com/shankerbalan/cloudstack-scripts/
blob/master/cloud-set-guest-password-debian
"""
def __init__(self, virtual_router_address):
self.virtual_router_address = virtual_router_address
def _do_request(self, domu_request):
# The password server was in the past, a broken HTTP server, but is now
# fixed. wget handles this seamlessly, so it's easier to shell out to
# that rather than write our own handling code.
output, _ = util.subp([
'wget', '--quiet', '--tries', '3', '--timeout', '20',
'--output-document', '-', '--header',
'DomU_Request: {0}'.format(domu_request),
'{0}:8080'.format(self.virtual_router_address)
])
return output.strip()
def get_password(self):
password = self._do_request('send_my_password')
if password in ['', 'saved_password']:
return None
if password == 'bad_request':
raise RuntimeError('Error when attempting to fetch root password.')
self._do_request('saved_password')
return password
class DataSourceCloudStack(sources.DataSource):
def __init__(self, sys_cfg, distro, paths):
sources.DataSource.__init__(self, sys_cfg, distro, paths)
self.seed_dir = os.path.join(paths.seed_dir, 'cs')
# Cloudstack has its metadata/userdata URLs located at
# http://<virtual-router-ip>/latest/
self.api_ver = 'latest'
self.vr_addr = get_vr_address()
if not self.vr_addr:
raise RuntimeError("No virtual router found!")
self.metadata_address = "http://%s/" % (self.vr_addr,)
self.cfg = {}
def _get_url_settings(self):
mcfg = self.ds_cfg
max_wait = 120
try:
max_wait = int(mcfg.get("max_wait", max_wait))
except Exception:
util.logexc(LOG, "Failed to get max wait. using %s", max_wait)
if max_wait == 0:
return False
timeout = 50
try:
timeout = int(mcfg.get("timeout", timeout))
except Exception:
util.logexc(LOG, "Failed to get timeout, using %s", timeout)
return (max_wait, timeout)
def wait_for_metadata_service(self):
(max_wait, timeout) = self._get_url_settings()
urls = [uhelp.combine_url(self.metadata_address,
'latest/meta-data/instance-id')]
start_time = time.time()
url = uhelp.wait_for_url(urls=urls, max_wait=max_wait,
timeout=timeout, status_cb=LOG.warn)
if url:
LOG.debug("Using metadata source: '%s'", url)
else:
LOG.critical(("Giving up on waiting for the metadata from %s"
" after %s seconds"),
urls, int(time.time() - start_time))
return bool(url)
def get_config_obj(self):
return self.cfg
def get_data(self):
seed_ret = {}
if util.read_optional_seed(seed_ret, base=(self.seed_dir + "/")):
self.userdata_raw = seed_ret['user-data']
self.metadata = seed_ret['meta-data']
LOG.debug("Using seeded cloudstack data from: %s", self.seed_dir)
return True
try:
if not self.wait_for_metadata_service():
return False
start_time = time.time()
self.userdata_raw = ec2.get_instance_userdata(
self.api_ver, self.metadata_address)
self.metadata = ec2.get_instance_metadata(self.api_ver,
self.metadata_address)
LOG.debug("Crawl of metadata service took %s seconds",
int(time.time() - start_time))
password_client = CloudStackPasswordServerClient(self.vr_addr)
try:
set_password = password_client.get_password()
except Exception:
util.logexc(LOG,
'Failed to fetch password from virtual router %s',
self.vr_addr)
else:
if set_password:
self.cfg = {
'ssh_pwauth': True,
'password': set_password,
'chpasswd': {
'expire': False,
},
}
return True
except Exception:
util.logexc(LOG, 'Failed fetching from metadata service %s',
self.metadata_address)
return False
def get_instance_id(self):
return self.metadata['instance-id']
@property
def availability_zone(self):
return self.metadata['availability-zone']
def get_default_gateway():
# Returns the default gateway ip address in the dotted format.
lines = util.load_file("/proc/net/route").splitlines()
for line in lines:
items = line.split("\t")
if items[1] == "00000000":
# Found the default route, get the gateway
gw = inet_ntoa(pack("<L", int(items[2], 16)))
LOG.debug("Found default route, gateway is %s", gw)
return gw
return None
def get_dhclient_d():
# find lease files directory
supported_dirs = ["/var/lib/dhclient", "/var/lib/dhcp"]
for d in supported_dirs:
if os.path.exists(d):
LOG.debug("Using %s lease directory", d)
return d
return None
def get_latest_lease():
# find latest lease file
lease_d = get_dhclient_d()
if not lease_d:
return None
lease_files = os.listdir(lease_d)
latest_mtime = -1
latest_file = None
for file_name in lease_files:
if file_name.startswith("dhclient.") and \
(file_name.endswith(".lease") or file_name.endswith(".leases")):
abs_path = os.path.join(lease_d, file_name)
mtime = os.path.getmtime(abs_path)
if mtime > latest_mtime:
latest_mtime = mtime
latest_file = abs_path
return latest_file
def get_vr_address():
# Get the address of the virtual router via dhcp leases
# see http://bit.ly/T76eKC for documentation on the virtual router.
# If no virtual router is detected, fallback on default gateway.
lease_file = get_latest_lease()
if not lease_file:
LOG.debug("No lease file found, using default gateway")
return get_default_gateway()
latest_address = None
with open(lease_file, "r") as fd:
for line in fd:
if "dhcp-server-identifier" in line:
words = line.strip(" ;\r\n").split(" ")
if len(words) > 2:
dhcp = words[2]
LOG.debug("Found DHCP identifier %s", dhcp)
latest_address = dhcp
if not latest_address:
# No virtual router found, fallback on default gateway
LOG.debug("No DHCP found, using default gateway")
return get_default_gateway()
return latest_address
# Used to match classes to dependencies
datasources = [
(DataSourceCloudStack, (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)
|
