/usr/lib/python2.7/dist-packages/cloudinit/sources/helpers/openstack.py is in cloud-init 0.7.6~bzr976-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 | # vi: ts=4 expandtab
#
# Copyright (C) 2012 Canonical Ltd.
# Copyright (C) 2012 Yahoo! Inc.
#
# Author: Scott Moser <scott.moser@canonical.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 abc
import base64
import copy
import os
from cloudinit import ec2_utils
from cloudinit import log as logging
from cloudinit import sources
from cloudinit import url_helper
from cloudinit import util
# For reference: http://tinyurl.com/laora4c
LOG = logging.getLogger(__name__)
FILES_V1 = {
# Path <-> (metadata key name, translator function, default value)
'etc/network/interfaces': ('network_config', lambda x: x, ''),
'meta.js': ('meta_js', util.load_json, {}),
"root/.ssh/authorized_keys": ('authorized_keys', lambda x: x, ''),
}
KEY_COPIES = (
# Cloud-init metadata names <-> (metadata key, is required)
('local-hostname', 'hostname', False),
('instance-id', 'uuid', True),
)
OS_LATEST = 'latest'
OS_FOLSOM = '2012-08-10'
OS_GRIZZLY = '2013-04-04'
OS_HAVANA = '2013-10-17'
OS_VERSIONS = (
OS_FOLSOM,
OS_GRIZZLY,
OS_HAVANA,
)
class NonReadable(IOError):
pass
class BrokenMetadata(IOError):
pass
class SourceMixin(object):
def _ec2_name_to_device(self, name):
if not self.ec2_metadata:
return None
bdm = self.ec2_metadata.get('block-device-mapping', {})
for (ent_name, device) in bdm.items():
if name == ent_name:
return device
return None
def get_public_ssh_keys(self):
name = "public_keys"
if self.version == 1:
name = "public-keys"
return sources.normalize_pubkey_data(self.metadata.get(name))
def _os_name_to_device(self, name):
device = None
try:
criteria = 'LABEL=%s' % (name)
if name == 'swap':
criteria = 'TYPE=%s' % (name)
dev_entries = util.find_devs_with(criteria)
if dev_entries:
device = dev_entries[0]
except util.ProcessExecutionError:
pass
return device
def _validate_device_name(self, device):
if not device:
return None
if not device.startswith("/"):
device = "/dev/%s" % device
if os.path.exists(device):
return device
# Durn, try adjusting the mapping
remapped = self._remap_device(os.path.basename(device))
if remapped:
LOG.debug("Remapped device name %s => %s", device, remapped)
return remapped
return None
def device_name_to_device(self, name):
# Translate a 'name' to a 'physical' device
if not name:
return None
# Try the ec2 mapping first
names = [name]
if name == 'root':
names.insert(0, 'ami')
if name == 'ami':
names.append('root')
device = None
LOG.debug("Using ec2 style lookup to find device %s", names)
for n in names:
device = self._ec2_name_to_device(n)
device = self._validate_device_name(device)
if device:
break
# Try the openstack way second
if not device:
LOG.debug("Using openstack style lookup to find device %s", names)
for n in names:
device = self._os_name_to_device(n)
device = self._validate_device_name(device)
if device:
break
# Ok give up...
if not device:
return None
else:
LOG.debug("Mapped %s to device %s", name, device)
return device
class BaseReader(object):
__metaclass__ = abc.ABCMeta
def __init__(self, base_path):
self.base_path = base_path
@abc.abstractmethod
def _path_join(self, base, *add_ons):
pass
@abc.abstractmethod
def _path_exists(self, path):
pass
@abc.abstractmethod
def _path_read(self, path):
pass
@abc.abstractmethod
def _read_ec2_metadata(self):
pass
def _read_content_path(self, item):
path = item.get('content_path', '').lstrip("/")
path_pieces = path.split("/")
valid_pieces = [p for p in path_pieces if len(p)]
if not valid_pieces:
raise BrokenMetadata("Item %s has no valid content path" % (item))
path = self._path_join(self.base_path, "openstack", *path_pieces)
return self._path_read(path)
def _find_working_version(self, version):
search_versions = [version] + list(OS_VERSIONS)
for potential_version in search_versions:
if not potential_version:
continue
path = self._path_join(self.base_path, "openstack",
potential_version)
if self._path_exists(path):
if potential_version != version:
LOG.debug("Version '%s' not available, attempting to use"
" version '%s' instead", version,
potential_version)
return potential_version
LOG.debug("Version '%s' not available, attempting to use '%s'"
" instead", version, OS_LATEST)
return OS_LATEST
def read_v2(self, version=None):
"""Reads a version 2 formatted location.
Return a dict with metadata, userdata, ec2-metadata, dsmode,
network_config, files and version (2).
If not a valid location, raise a NonReadable exception.
"""
def datafiles(version):
files = {}
files['metadata'] = (
# File path to read
self._path_join("openstack", version, 'meta_data.json'),
# Is it required?
True,
# Translator function (applied after loading)
util.load_json,
)
files['userdata'] = (
self._path_join("openstack", version, 'user_data'),
False,
lambda x: x,
)
files['vendordata'] = (
self._path_join("openstack", version, 'vendor_data.json'),
False,
util.load_json,
)
return files
version = self._find_working_version(version)
results = {
'userdata': '',
'version': 2,
}
data = datafiles(version)
for (name, (path, required, translator)) in data.iteritems():
path = self._path_join(self.base_path, path)
data = None
found = False
if self._path_exists(path):
try:
data = self._path_read(path)
except IOError:
raise NonReadable("Failed to read: %s" % path)
found = True
else:
if required:
raise NonReadable("Missing mandatory path: %s" % path)
if found and translator:
try:
data = translator(data)
except Exception as e:
raise BrokenMetadata("Failed to process "
"path %s: %s" % (path, e))
if found:
results[name] = data
metadata = results['metadata']
if 'random_seed' in metadata:
random_seed = metadata['random_seed']
try:
metadata['random_seed'] = base64.b64decode(random_seed)
except (ValueError, TypeError) as e:
raise BrokenMetadata("Badly formatted metadata"
" random_seed entry: %s" % e)
# load any files that were provided
files = {}
metadata_files = metadata.get('files', [])
for item in metadata_files:
if 'path' not in item:
continue
path = item['path']
try:
files[path] = self._read_content_path(item)
except Exception as e:
raise BrokenMetadata("Failed to read provided "
"file %s: %s" % (path, e))
results['files'] = files
# The 'network_config' item in metadata is a content pointer
# to the network config that should be applied. It is just a
# ubuntu/debian '/etc/network/interfaces' file.
net_item = metadata.get("network_config", None)
if net_item:
try:
results['network_config'] = self._read_content_path(net_item)
except IOError as e:
raise BrokenMetadata("Failed to read network"
" configuration: %s" % (e))
# To openstack, user can specify meta ('nova boot --meta=key=value')
# and those will appear under metadata['meta'].
# if they specify 'dsmode' they're indicating the mode that they intend
# for this datasource to operate in.
try:
results['dsmode'] = metadata['meta']['dsmode']
except KeyError:
pass
# Read any ec2-metadata (if applicable)
results['ec2-metadata'] = self._read_ec2_metadata()
# Perform some misc. metadata key renames...
for (target_key, source_key, is_required) in KEY_COPIES:
if is_required and source_key not in metadata:
raise BrokenMetadata("No '%s' entry in metadata" % source_key)
if source_key in metadata:
metadata[target_key] = metadata.get(source_key)
return results
class ConfigDriveReader(BaseReader):
def __init__(self, base_path):
super(ConfigDriveReader, self).__init__(base_path)
def _path_join(self, base, *add_ons):
components = [base] + list(add_ons)
return os.path.join(*components)
def _path_exists(self, path):
return os.path.exists(path)
def _path_read(self, path):
return util.load_file(path)
def _read_ec2_metadata(self):
path = self._path_join(self.base_path,
'ec2', 'latest', 'meta-data.json')
if not self._path_exists(path):
return {}
else:
try:
return util.load_json(self._path_read(path))
except Exception as e:
raise BrokenMetadata("Failed to process "
"path %s: %s" % (path, e))
def read_v1(self):
"""Reads a version 1 formatted location.
Return a dict with metadata, userdata, dsmode, files and version (1).
If not a valid path, raise a NonReadable exception.
"""
found = {}
for name in FILES_V1.keys():
path = self._path_join(self.base_path, name)
if self._path_exists(path):
found[name] = path
if len(found) == 0:
raise NonReadable("%s: no files found" % (self.base_path))
md = {}
for (name, (key, translator, default)) in FILES_V1.iteritems():
if name in found:
path = found[name]
try:
contents = self._path_read(path)
except IOError:
raise BrokenMetadata("Failed to read: %s" % path)
try:
md[key] = translator(contents)
except Exception as e:
raise BrokenMetadata("Failed to process "
"path %s: %s" % (path, e))
else:
md[key] = copy.deepcopy(default)
keydata = md['authorized_keys']
meta_js = md['meta_js']
# keydata in meta_js is preferred over "injected"
keydata = meta_js.get('public-keys', keydata)
if keydata:
lines = keydata.splitlines()
md['public-keys'] = [l for l in lines
if len(l) and not l.startswith("#")]
# config-drive-v1 has no way for openstack to provide the instance-id
# so we copy that into metadata from the user input
if 'instance-id' in meta_js:
md['instance-id'] = meta_js['instance-id']
results = {
'version': 1,
'metadata': md,
}
# allow the user to specify 'dsmode' in a meta tag
if 'dsmode' in meta_js:
results['dsmode'] = meta_js['dsmode']
# config-drive-v1 has no way of specifying user-data, so the user has
# to cheat and stuff it in a meta tag also.
results['userdata'] = meta_js.get('user-data', '')
# this implementation does not support files other than
# network/interfaces and authorized_keys...
results['files'] = {}
return results
class MetadataReader(BaseReader):
def __init__(self, base_url, ssl_details=None, timeout=5, retries=5):
super(MetadataReader, self).__init__(base_url)
self.ssl_details = ssl_details
self.timeout = float(timeout)
self.retries = int(retries)
def _path_read(self, path):
response = url_helper.readurl(path,
retries=self.retries,
ssl_details=self.ssl_details,
timeout=self.timeout)
return response.contents
def _path_exists(self, path):
def should_retry_cb(request, cause):
try:
code = int(cause.code)
if code >= 400:
return False
except (TypeError, ValueError):
# Older versions of requests didn't have a code.
pass
return True
try:
response = url_helper.readurl(path,
retries=self.retries,
ssl_details=self.ssl_details,
timeout=self.timeout,
exception_cb=should_retry_cb)
return response.ok()
except IOError:
return False
def _path_join(self, base, *add_ons):
return url_helper.combine_url(base, *add_ons)
def _read_ec2_metadata(self):
return ec2_utils.get_instance_metadata(ssl_details=self.ssl_details,
timeout=self.timeout,
retries=self.retries)
|