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
|
# 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
from cloudinit import log as logging
from cloudinit import sources
from cloudinit import util
LOG = logging.getLogger(__name__)
class DataSourceNoCloud(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_data(self):
defaults = {
"instance-id": "nocloud",
"dsmode": self.dsmode,
}
found = []
md = {}
ud = ""
try:
# Parse the kernel command line, getting data passed in
if parse_cmdline_data(self.cmdline_id, md):
found.append("cmdline")
except:
util.logexc(LOG, "Unable to parse command line data")
return False
# Check to see if the seed dir has data.
seedret = {}
if util.read_optional_seed(seedret, base=self.seed_dir + "/"):
md = util.mergedict(md, seedret['meta-data'])
ud = seedret['user-data']
found.append(self.seed_dir)
LOG.debug("Using seeded cache data from %s", self.seed_dir)
# If the datasource config had a 'seedfrom' entry, then that takes
# precedence over a 'seedfrom' that was found in a filesystem
# but not over external media
if 'seedfrom' in self.ds_cfg and self.ds_cfg['seedfrom']:
found.append("ds_config")
md["seedfrom"] = self.ds_cfg['seedfrom']
fslist = util.find_devs_with("TYPE=vfat")
fslist.extend(util.find_devs_with("TYPE=iso9660"))
label_list = util.find_devs_with("LABEL=cidata")
devlist = list(set(fslist) & set(label_list))
devlist.sort(reverse=True)
for dev in devlist:
try:
LOG.debug("Attempting to use data from %s", dev)
(newmd, newud) = util.mount_cb(dev, util.read_seeded)
md = util.mergedict(newmd, md)
ud = newud
# For seed from a device, the default mode is 'net'.
# that is more likely to be what is desired.
# If they want dsmode of local, then they must
# specify that.
if 'dsmode' not in md:
md['dsmode'] = "net"
LOG.debug("Using data from %s", dev)
found.append(dev)
break
except OSError as e:
if e.errno != errno.ENOENT:
raise
except util.MountFailedError:
util.logexc(LOG, "Failed to mount %s when looking for seed", dev)
# There was no indication on kernel cmdline or data
# in the seeddir suggesting this handler should be used.
if len(found) == 0:
return False
seeded_interfaces = None
# The special argument "seedfrom" indicates we should
# attempt to seed the userdata / metadata from its value
# its primarily value is in allowing the user to type less
# on the command line, ie: ds=nocloud;s=http://bit.ly/abcdefg
if "seedfrom" in md:
seedfrom = md["seedfrom"]
seedfound = False
for proto in self.supported_seed_starts:
if seedfrom.startswith(proto):
seedfound = proto
break
if not seedfound:
LOG.debug("Seed from %s not supported by %s", seedfrom, self)
return False
if 'network-interfaces' in md:
seeded_interfaces = self.dsmode
# This could throw errors, but the user told us to do it
# so if errors are raised, let them raise
(md_seed, ud) = util.read_seeded(seedfrom, timeout=None)
LOG.debug("Using seeded cache data from %s", seedfrom)
# Values in the command line override those from the seed
md = util.mergedict(md, md_seed)
found.append(seedfrom)
# Now that we have exhausted any other places merge in the defaults
md = util.mergedict(md, defaults)
# Update the network-interfaces if metadata had 'network-interfaces'
# entry and this is the local datasource, or 'seedfrom' was used
# and the source of the seed was self.dsmode
# ('local' for NoCloud, 'net' for NoCloudNet')
if ('network-interfaces' in md and
(self.dsmode in ("local", seeded_interfaces))):
LOG.info("Updating network interfaces from %s", self)
self.distro.apply_network(md['network-interfaces'])
if md['dsmode'] == self.dsmode:
self.seed = ",".join(found)
self.metadata = md
self.userdata_raw = ud
return True
LOG.debug("%s: not claiming datasource, dsmode=%s", self, md['dsmode'])
return False
# Returns true or false indicating if cmdline indicated
# that this module should be used
# Example cmdline:
# root=LABEL=uec-rootfs ro ds=nocloud
def parse_cmdline_data(ds_id, fill, cmdline=None):
if cmdline is None:
cmdline = util.get_cmdline()
cmdline = " %s " % cmdline
if not (" %s " % ds_id in cmdline or " %s;" % ds_id in cmdline):
return False
argline = ""
# cmdline can contain:
# ds=nocloud[;key=val;key=val]
for tok in cmdline.split():
if tok.startswith(ds_id):
argline = tok.split("=", 1)
# argline array is now 'nocloud' followed optionally by
# a ';' and then key=value pairs also terminated with ';'
tmp = argline[1].split(";")
if len(tmp) > 1:
kvpairs = tmp[1:]
else:
kvpairs = ()
# short2long mapping to save cmdline typing
s2l = {"h": "local-hostname", "i": "instance-id", "s": "seedfrom"}
for item in kvpairs:
try:
(k, v) = item.split("=", 1)
except:
k = item
v = None
if k in s2l:
k = s2l[k]
fill[k] = v
return True
class DataSourceNoCloudNet(DataSourceNoCloud):
def __init__(self, sys_cfg, distro, paths):
DataSourceNoCloud.__init__(self, sys_cfg, distro, paths)
self.cmdline_id = "ds=nocloud-net"
self.supported_seed_starts = ("http://", "https://", "ftp://")
self.seed_dir = os.path.join(paths.seed_dir, 'nocloud-net')
self.dsmode = "net"
# Used to match classes to dependencies
datasources = [
(DataSourceNoCloud, (sources.DEP_FILESYSTEM, )),
(DataSourceNoCloudNet, (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)
|
