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util.py
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util.py
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# Copyright (C) 2012 Canonical Ltd.
# Copyright (C) 2012, 2013 Hewlett-Packard Development Company, L.P.
# Copyright (C) 2012 Yahoo! Inc.
#
# Author: Scott Moser <scott.moser@canonical.com>
# Author: Juerg Haefliger <juerg.haefliger@hp.com>
# Author: Joshua Harlow <harlowja@yahoo-inc.com>
#
# This file is part of cloud-init. See LICENSE file for license information.
import contextlib
import copy as obj_copy
import ctypes
import email
import glob
import grp
import gzip
import hashlib
import json
import os
import os.path
import platform
import pwd
import random
import re
import shlex
import shutil
import socket
import stat
import string
import subprocess
import sys
import time
from errno import ENOENT, ENOEXEC
from base64 import b64decode, b64encode
from six.moves.urllib import parse as urlparse
import six
import yaml
from cloudinit import importer
from cloudinit import log as logging
from cloudinit import mergers
from cloudinit import safeyaml
from cloudinit import temp_utils
from cloudinit import type_utils
from cloudinit import url_helper
from cloudinit import version
from cloudinit.settings import (CFG_BUILTIN)
try:
string_types = (basestring,)
except NameError:
string_types = (str,)
_DNS_REDIRECT_IP = None
LOG = logging.getLogger(__name__)
# Helps cleanup filenames to ensure they aren't FS incompatible
FN_REPLACEMENTS = {
os.sep: '_',
}
FN_ALLOWED = ('_-.()' + string.digits + string.ascii_letters)
TRUE_STRINGS = ('true', '1', 'on', 'yes')
FALSE_STRINGS = ('off', '0', 'no', 'false')
# Helper utils to see if running in a container
CONTAINER_TESTS = (['systemd-detect-virt', '--quiet', '--container'],
['running-in-container'],
['lxc-is-container'])
PROC_CMDLINE = None
_LSB_RELEASE = {}
PY26 = sys.version_info[0:2] == (2, 6)
def get_architecture(target=None):
out, _ = subp(['dpkg', '--print-architecture'], capture=True,
target=target)
return out.strip()
def _lsb_release(target=None):
fmap = {'Codename': 'codename', 'Description': 'description',
'Distributor ID': 'id', 'Release': 'release'}
data = {}
try:
out, _ = subp(['lsb_release', '--all'], capture=True, target=target)
for line in out.splitlines():
fname, _, val = line.partition(":")
if fname in fmap:
data[fmap[fname]] = val.strip()
missing = [k for k in fmap.values() if k not in data]
if len(missing):
LOG.warning("Missing fields in lsb_release --all output: %s",
','.join(missing))
except ProcessExecutionError as err:
LOG.warning("Unable to get lsb_release --all: %s", err)
data = dict((v, "UNAVAILABLE") for v in fmap.values())
return data
def lsb_release(target=None):
if target_path(target) != "/":
# do not use or update cache if target is provided
return _lsb_release(target)
global _LSB_RELEASE
if not _LSB_RELEASE:
data = _lsb_release()
_LSB_RELEASE.update(data)
return _LSB_RELEASE
def target_path(target, path=None):
# return 'path' inside target, accepting target as None
if target in (None, ""):
target = "/"
elif not isinstance(target, string_types):
raise ValueError("Unexpected input for target: %s" % target)
else:
target = os.path.abspath(target)
# abspath("//") returns "//" specifically for 2 slashes.
if target.startswith("//"):
target = target[1:]
if not path:
return target
# os.path.join("/etc", "/foo") returns "/foo". Chomp all leading /.
while len(path) and path[0] == "/":
path = path[1:]
return os.path.join(target, path)
def decode_binary(blob, encoding='utf-8'):
# Converts a binary type into a text type using given encoding.
if isinstance(blob, six.string_types):
return blob
return blob.decode(encoding)
def encode_text(text, encoding='utf-8'):
# Converts a text string into a binary type using given encoding.
if isinstance(text, six.binary_type):
return text
return text.encode(encoding)
def b64d(source):
# Base64 decode some data, accepting bytes or unicode/str, and returning
# str/unicode if the result is utf-8 compatible, otherwise returning bytes.
decoded = b64decode(source)
try:
return decoded.decode('utf-8')
except UnicodeDecodeError:
return decoded
def b64e(source):
# Base64 encode some data, accepting bytes or unicode/str, and returning
# str/unicode if the result is utf-8 compatible, otherwise returning bytes.
if not isinstance(source, bytes):
source = source.encode('utf-8')
return b64encode(source).decode('utf-8')
def fully_decoded_payload(part):
# In Python 3, decoding the payload will ironically hand us a bytes object.
# 'decode' means to decode according to Content-Transfer-Encoding, not
# according to any charset in the Content-Type. So, if we end up with
# bytes, first try to decode to str via CT charset, and failing that, try
# utf-8 using surrogate escapes.
cte_payload = part.get_payload(decode=True)
if (six.PY3 and
part.get_content_maintype() == 'text' and
isinstance(cte_payload, bytes)):
charset = part.get_charset()
if charset and charset.input_codec:
encoding = charset.input_codec
else:
encoding = 'utf-8'
return cte_payload.decode(encoding, 'surrogateescape')
return cte_payload
# Path for DMI Data
DMI_SYS_PATH = "/sys/class/dmi/id"
# dmidecode and /sys/class/dmi/id/* use different names for the same value,
# this allows us to refer to them by one canonical name
DMIDECODE_TO_DMI_SYS_MAPPING = {
'baseboard-asset-tag': 'board_asset_tag',
'baseboard-manufacturer': 'board_vendor',
'baseboard-product-name': 'board_name',
'baseboard-serial-number': 'board_serial',
'baseboard-version': 'board_version',
'bios-release-date': 'bios_date',
'bios-vendor': 'bios_vendor',
'bios-version': 'bios_version',
'chassis-asset-tag': 'chassis_asset_tag',
'chassis-manufacturer': 'chassis_vendor',
'chassis-serial-number': 'chassis_serial',
'chassis-version': 'chassis_version',
'system-manufacturer': 'sys_vendor',
'system-product-name': 'product_name',
'system-serial-number': 'product_serial',
'system-uuid': 'product_uuid',
'system-version': 'product_version',
}
class ProcessExecutionError(IOError):
MESSAGE_TMPL = ('%(description)s\n'
'Command: %(cmd)s\n'
'Exit code: %(exit_code)s\n'
'Reason: %(reason)s\n'
'Stdout: %(stdout)s\n'
'Stderr: %(stderr)s')
empty_attr = '-'
def __init__(self, stdout=None, stderr=None,
exit_code=None, cmd=None,
description=None, reason=None,
errno=None):
if not cmd:
self.cmd = self.empty_attr
else:
self.cmd = cmd
if not description:
if not exit_code and errno == ENOEXEC:
self.description = 'Exec format error. Missing #! in script?'
else:
self.description = 'Unexpected error while running command.'
else:
self.description = description
if not isinstance(exit_code, six.integer_types):
self.exit_code = self.empty_attr
else:
self.exit_code = exit_code
if not stderr:
if stderr is None:
self.stderr = self.empty_attr
else:
self.stderr = stderr
else:
self.stderr = self._indent_text(stderr)
if not stdout:
if stdout is None:
self.stdout = self.empty_attr
else:
self.stdout = stdout
else:
self.stdout = self._indent_text(stdout)
if reason:
self.reason = reason
else:
self.reason = self.empty_attr
self.errno = errno
message = self.MESSAGE_TMPL % {
'description': self._ensure_string(self.description),
'cmd': self._ensure_string(self.cmd),
'exit_code': self._ensure_string(self.exit_code),
'stdout': self._ensure_string(self.stdout),
'stderr': self._ensure_string(self.stderr),
'reason': self._ensure_string(self.reason),
}
IOError.__init__(self, message)
def _ensure_string(self, text):
"""
if data is bytes object, decode
"""
return text.decode() if isinstance(text, six.binary_type) else text
def _indent_text(self, text, indent_level=8):
"""
indent text on all but the first line, allowing for easy to read output
"""
cr = '\n'
indent = ' ' * indent_level
# if input is bytes, return bytes
if isinstance(text, six.binary_type):
cr = cr.encode()
indent = indent.encode()
# remove any newlines at end of text first to prevent unneeded blank
# line in output
return text.rstrip(cr).replace(cr, cr + indent)
class SeLinuxGuard(object):
def __init__(self, path, recursive=False):
# Late import since it might not always
# be possible to use this
try:
self.selinux = importer.import_module('selinux')
except ImportError:
self.selinux = None
self.path = path
self.recursive = recursive
def __enter__(self):
if self.selinux and self.selinux.is_selinux_enabled():
return True
else:
return False
def __exit__(self, excp_type, excp_value, excp_traceback):
if not self.selinux or not self.selinux.is_selinux_enabled():
return
if not os.path.lexists(self.path):
return
path = os.path.realpath(self.path)
# path should be a string, not unicode
if six.PY2:
path = str(path)
try:
stats = os.lstat(path)
self.selinux.matchpathcon(path, stats[stat.ST_MODE])
except OSError:
return
LOG.debug("Restoring selinux mode for %s (recursive=%s)",
path, self.recursive)
try:
self.selinux.restorecon(path, recursive=self.recursive)
except OSError as e:
LOG.warning('restorecon failed on %s,%s maybe badness? %s',
path, self.recursive, e)
class MountFailedError(Exception):
pass
class DecompressionError(Exception):
pass
def fork_cb(child_cb, *args, **kwargs):
fid = os.fork()
if fid == 0:
try:
child_cb(*args, **kwargs)
os._exit(0)
except Exception:
logexc(LOG, "Failed forking and calling callback %s",
type_utils.obj_name(child_cb))
os._exit(1)
else:
LOG.debug("Forked child %s who will run callback %s",
fid, type_utils.obj_name(child_cb))
def is_true(val, addons=None):
if isinstance(val, (bool)):
return val is True
check_set = TRUE_STRINGS
if addons:
check_set = list(check_set) + addons
if six.text_type(val).lower().strip() in check_set:
return True
return False
def is_false(val, addons=None):
if isinstance(val, (bool)):
return val is False
check_set = FALSE_STRINGS
if addons:
check_set = list(check_set) + addons
if six.text_type(val).lower().strip() in check_set:
return True
return False
def translate_bool(val, addons=None):
if not val:
# This handles empty lists and false and
# other things that python believes are false
return False
# If its already a boolean skip
if isinstance(val, (bool)):
return val
return is_true(val, addons)
def rand_str(strlen=32, select_from=None):
if not select_from:
select_from = string.ascii_letters + string.digits
return "".join([random.choice(select_from) for _x in range(0, strlen)])
def rand_dict_key(dictionary, postfix=None):
if not postfix:
postfix = ""
while True:
newkey = rand_str(strlen=8) + "_" + postfix
if newkey not in dictionary:
break
return newkey
def read_conf(fname):
try:
return load_yaml(load_file(fname), default={})
except IOError as e:
if e.errno == ENOENT:
return {}
else:
raise
# Merges X lists, and then keeps the
# unique ones, but orders by sort order
# instead of by the original order
def uniq_merge_sorted(*lists):
return sorted(uniq_merge(*lists))
# Merges X lists and then iterates over those
# and only keeps the unique items (order preserving)
# and returns that merged and uniqued list as the
# final result.
#
# Note: if any entry is a string it will be
# split on commas and empty entries will be
# evicted and merged in accordingly.
def uniq_merge(*lists):
combined_list = []
for a_list in lists:
if isinstance(a_list, six.string_types):
a_list = a_list.strip().split(",")
# Kickout the empty ones
a_list = [a for a in a_list if len(a)]
combined_list.extend(a_list)
return uniq_list(combined_list)
def clean_filename(fn):
for (k, v) in FN_REPLACEMENTS.items():
fn = fn.replace(k, v)
removals = []
for k in fn:
if k not in FN_ALLOWED:
removals.append(k)
for k in removals:
fn = fn.replace(k, '')
fn = fn.strip()
return fn
def decomp_gzip(data, quiet=True, decode=True):
try:
buf = six.BytesIO(encode_text(data))
with contextlib.closing(gzip.GzipFile(None, "rb", 1, buf)) as gh:
# E1101 is https://github.com/PyCQA/pylint/issues/1444
if decode:
return decode_binary(gh.read()) # pylint: disable=E1101
else:
return gh.read() # pylint: disable=E1101
except Exception as e:
if quiet:
return data
else:
raise DecompressionError(six.text_type(e))
def extract_usergroup(ug_pair):
if not ug_pair:
return (None, None)
ug_parted = ug_pair.split(':', 1)
u = ug_parted[0].strip()
if len(ug_parted) == 2:
g = ug_parted[1].strip()
else:
g = None
if not u or u == "-1" or u.lower() == "none":
u = None
if not g or g == "-1" or g.lower() == "none":
g = None
return (u, g)
def find_modules(root_dir):
entries = dict()
for fname in glob.glob(os.path.join(root_dir, "*.py")):
if not os.path.isfile(fname):
continue
modname = os.path.basename(fname)[0:-3]
modname = modname.strip()
if modname and modname.find(".") == -1:
entries[fname] = modname
return entries
def multi_log(text, console=True, stderr=True,
log=None, log_level=logging.DEBUG):
if stderr:
sys.stderr.write(text)
if console:
conpath = "/dev/console"
if os.path.exists(conpath):
with open(conpath, 'w') as wfh:
wfh.write(text)
wfh.flush()
else:
# A container may lack /dev/console (arguably a container bug). If
# it does not exist, then write output to stdout. this will result
# in duplicate stderr and stdout messages if stderr was True.
#
# even though upstart or systemd might have set up output to go to
# /dev/console, the user may have configured elsewhere via
# cloud-config 'output'. If there is /dev/console, messages will
# still get there.
sys.stdout.write(text)
if log:
if text[-1] == "\n":
log.log(log_level, text[:-1])
else:
log.log(log_level, text)
def is_ipv4(instr):
"""determine if input string is a ipv4 address. return boolean."""
toks = instr.split('.')
if len(toks) != 4:
return False
try:
toks = [x for x in toks if 0 <= int(x) < 256]
except Exception:
return False
return len(toks) == 4
def is_FreeBSD():
return system_info()['variant'] == "freebsd"
def get_cfg_option_bool(yobj, key, default=False):
if key not in yobj:
return default
return translate_bool(yobj[key])
def get_cfg_option_str(yobj, key, default=None):
if key not in yobj:
return default
val = yobj[key]
if not isinstance(val, six.string_types):
val = str(val)
return val
def get_cfg_option_int(yobj, key, default=0):
return int(get_cfg_option_str(yobj, key, default=default))
def _parse_redhat_release(release_file=None):
"""Return a dictionary of distro info fields from /etc/redhat-release.
Dict keys will align with /etc/os-release keys:
ID, VERSION_ID, VERSION_CODENAME
"""
if not release_file:
release_file = '/etc/redhat-release'
if not os.path.exists(release_file):
return {}
redhat_release = load_file(release_file)
redhat_regex = (
r'(?P<name>.+) release (?P<version>[\d\.]+) '
r'\((?P<codename>[^)]+)\)')
match = re.match(redhat_regex, redhat_release)
if match:
group = match.groupdict()
group['name'] = group['name'].lower().partition(' linux')[0]
if group['name'] == 'red hat enterprise':
group['name'] = 'redhat'
return {'ID': group['name'], 'VERSION_ID': group['version'],
'VERSION_CODENAME': group['codename']}
return {}
def get_linux_distro():
distro_name = ''
distro_version = ''
flavor = ''
os_release = {}
if os.path.exists('/etc/os-release'):
os_release = load_shell_content(load_file('/etc/os-release'))
if not os_release:
os_release = _parse_redhat_release()
if os_release:
distro_name = os_release.get('ID', '')
distro_version = os_release.get('VERSION_ID', '')
if 'sles' in distro_name or 'suse' in distro_name:
# RELEASE_BLOCKER: We will drop this sles ivergent behavior in
# before 18.4 so that get_linux_distro returns a named tuple
# which will include both version codename and architecture
# on all distributions.
flavor = platform.machine()
else:
flavor = os_release.get('VERSION_CODENAME', '')
if not flavor:
match = re.match(r'[^ ]+ \((?P<codename>[^)]+)\)',
os_release.get('VERSION', ''))
if match:
flavor = match.groupdict()['codename']
if distro_name == 'rhel':
distro_name = 'redhat'
else:
dist = ('', '', '')
try:
# Will be removed in 3.7
dist = platform.dist() # pylint: disable=W1505
except Exception:
pass
finally:
found = None
for entry in dist:
if entry:
found = 1
if not found:
LOG.warning('Unable to determine distribution, template '
'expansion may have unexpected results')
return dist
return (distro_name, distro_version, flavor)
def system_info():
info = {
'platform': platform.platform(),
'system': platform.system(),
'release': platform.release(),
'python': platform.python_version(),
'uname': platform.uname(),
'dist': get_linux_distro()
}
system = info['system'].lower()
var = 'unknown'
if system == "linux":
linux_dist = info['dist'][0].lower()
if linux_dist in ('centos', 'debian', 'fedora', 'rhel', 'suse'):
var = linux_dist
elif linux_dist in ('ubuntu', 'linuxmint', 'mint'):
var = 'ubuntu'
elif linux_dist == 'redhat':
var = 'rhel'
elif linux_dist in ('opensuse', 'sles'):
var = 'suse'
else:
var = 'linux'
elif system in ('windows', 'darwin', "freebsd"):
var = system
info['variant'] = var
return info
def get_cfg_option_list(yobj, key, default=None):
"""
Gets the C{key} config option from C{yobj} as a list of strings. If the
key is present as a single string it will be returned as a list with one
string arg.
@param yobj: The configuration object.
@param key: The configuration key to get.
@param default: The default to return if key is not found.
@return: The configuration option as a list of strings or default if key
is not found.
"""
if key not in yobj:
return default
if yobj[key] is None:
return []
val = yobj[key]
if isinstance(val, (list)):
cval = [v for v in val]
return cval
if not isinstance(val, six.string_types):
val = str(val)
return [val]
# get a cfg entry by its path array
# for f['a']['b']: get_cfg_by_path(mycfg,('a','b'))
def get_cfg_by_path(yobj, keyp, default=None):
cur = yobj
for tok in keyp:
if tok not in cur:
return default
cur = cur[tok]
return cur
def fixup_output(cfg, mode):
(outfmt, errfmt) = get_output_cfg(cfg, mode)
redirect_output(outfmt, errfmt)
return (outfmt, errfmt)
# redirect_output(outfmt, errfmt, orig_out, orig_err)
# replace orig_out and orig_err with filehandles specified in outfmt or errfmt
# fmt can be:
# > FILEPATH
# >> FILEPATH
# | program [ arg1 [ arg2 [ ... ] ] ]
#
# with a '|', arguments are passed to shell, so one level of
# shell escape is required.
#
# if _CLOUD_INIT_SAVE_STDOUT is set in environment to a non empty and true
# value then output input will not be closed (useful for debugging).
#
def redirect_output(outfmt, errfmt, o_out=None, o_err=None):
if is_true(os.environ.get("_CLOUD_INIT_SAVE_STDOUT")):
LOG.debug("Not redirecting output due to _CLOUD_INIT_SAVE_STDOUT")
return
if not o_out:
o_out = sys.stdout
if not o_err:
o_err = sys.stderr
if outfmt:
LOG.debug("Redirecting %s to %s", o_out, outfmt)
(mode, arg) = outfmt.split(" ", 1)
if mode == ">" or mode == ">>":
owith = "ab"
if mode == ">":
owith = "wb"
new_fp = open(arg, owith)
elif mode == "|":
proc = subprocess.Popen(arg, shell=True, stdin=subprocess.PIPE)
new_fp = proc.stdin
else:
raise TypeError("Invalid type for output format: %s" % outfmt)
if o_out:
os.dup2(new_fp.fileno(), o_out.fileno())
if errfmt == outfmt:
LOG.debug("Redirecting %s to %s", o_err, outfmt)
os.dup2(new_fp.fileno(), o_err.fileno())
return
if errfmt:
LOG.debug("Redirecting %s to %s", o_err, errfmt)
(mode, arg) = errfmt.split(" ", 1)
if mode == ">" or mode == ">>":
owith = "ab"
if mode == ">":
owith = "wb"
new_fp = open(arg, owith)
elif mode == "|":
proc = subprocess.Popen(arg, shell=True, stdin=subprocess.PIPE)
new_fp = proc.stdin
else:
raise TypeError("Invalid type for error format: %s" % errfmt)
if o_err:
os.dup2(new_fp.fileno(), o_err.fileno())
def make_url(scheme, host, port=None,
path='', params='', query='', fragment=''):
pieces = [scheme or '']
netloc = ''
if host:
netloc = str(host)
if port is not None:
netloc += ":" + "%s" % (port)
pieces.append(netloc or '')
pieces.append(path or '')
pieces.append(params or '')
pieces.append(query or '')
pieces.append(fragment or '')
return urlparse.urlunparse(pieces)
def mergemanydict(srcs, reverse=False):
if reverse:
srcs = reversed(srcs)
merged_cfg = {}
for cfg in srcs:
if cfg:
# Figure out which mergers to apply...
mergers_to_apply = mergers.dict_extract_mergers(cfg)
if not mergers_to_apply:
mergers_to_apply = mergers.default_mergers()
merger = mergers.construct(mergers_to_apply)
merged_cfg = merger.merge(merged_cfg, cfg)
return merged_cfg
@contextlib.contextmanager
def chdir(ndir):
curr = os.getcwd()
try:
os.chdir(ndir)
yield ndir
finally:
os.chdir(curr)
@contextlib.contextmanager
def umask(n_msk):
old = os.umask(n_msk)
try:
yield old
finally:
os.umask(old)
def center(text, fill, max_len):
return '{0:{fill}{align}{size}}'.format(text, fill=fill,
align="^", size=max_len)
def del_dir(path):
LOG.debug("Recursively deleting %s", path)
shutil.rmtree(path)
def runparts(dirp, skip_no_exist=True, exe_prefix=None):
if skip_no_exist and not os.path.isdir(dirp):
return
failed = []
attempted = []
if exe_prefix is None:
prefix = []
elif isinstance(exe_prefix, str):
prefix = [str(exe_prefix)]
elif isinstance(exe_prefix, list):
prefix = exe_prefix
else:
raise TypeError("exe_prefix must be None, str, or list")
for exe_name in sorted(os.listdir(dirp)):
exe_path = os.path.join(dirp, exe_name)
if os.path.isfile(exe_path) and os.access(exe_path, os.X_OK):
attempted.append(exe_path)
try:
subp(prefix + [exe_path], capture=False)
except ProcessExecutionError as e:
logexc(LOG, "Failed running %s [%s]", exe_path, e.exit_code)
failed.append(e)
if failed and attempted:
raise RuntimeError('Runparts: %s failures in %s attempted commands'
% (len(failed), len(attempted)))
# read_optional_seed
# returns boolean indicating success or failure (presense of files)
# if files are present, populates 'fill' dictionary with 'user-data' and
# 'meta-data' entries
def read_optional_seed(fill, base="", ext="", timeout=5):
try:
(md, ud) = read_seeded(base, ext, timeout)
fill['user-data'] = ud
fill['meta-data'] = md
return True
except url_helper.UrlError as e:
if e.code == url_helper.NOT_FOUND:
return False
raise
def fetch_ssl_details(paths=None):
ssl_details = {}
# Lookup in these locations for ssl key/cert files
ssl_cert_paths = [
'/var/lib/cloud/data/ssl',
'/var/lib/cloud/instance/data/ssl',
]
if paths:
ssl_cert_paths.extend([
os.path.join(paths.get_ipath_cur('data'), 'ssl'),
os.path.join(paths.get_cpath('data'), 'ssl'),
])
ssl_cert_paths = uniq_merge(ssl_cert_paths)
ssl_cert_paths = [d for d in ssl_cert_paths if d and os.path.isdir(d)]
cert_file = None
for d in ssl_cert_paths:
if os.path.isfile(os.path.join(d, 'cert.pem')):
cert_file = os.path.join(d, 'cert.pem')
break
key_file = None
for d in ssl_cert_paths:
if os.path.isfile(os.path.join(d, 'key.pem')):
key_file = os.path.join(d, 'key.pem')
break
if cert_file and key_file:
ssl_details['cert_file'] = cert_file
ssl_details['key_file'] = key_file
elif cert_file:
ssl_details['cert_file'] = cert_file
return ssl_details
def load_yaml(blob, default=None, allowed=(dict,)):
loaded = default
blob = decode_binary(blob)
try:
LOG.debug("Attempting to load yaml from string "
"of length %s with allowed root types %s",
len(blob), allowed)
converted = safeyaml.load(blob)
if converted is None:
LOG.debug("loaded blob returned None, returning default.")
converted = default
elif not isinstance(converted, allowed):
# Yes this will just be caught, but thats ok for now...
raise TypeError(("Yaml load allows %s root types,"
" but got %s instead") %
(allowed, type_utils.obj_name(converted)))
loaded = converted
except (yaml.YAMLError, TypeError, ValueError) as e:
msg = 'Failed loading yaml blob'
mark = None
if hasattr(e, 'context_mark') and getattr(e, 'context_mark'):
mark = getattr(e, 'context_mark')
elif hasattr(e, 'problem_mark') and getattr(e, 'problem_mark'):
mark = getattr(e, 'problem_mark')
if mark:
msg += (
'. Invalid format at line {line} column {col}: "{err}"'.format(
line=mark.line + 1, col=mark.column + 1, err=e))
else:
msg += '. {err}'.format(err=e)
LOG.warning(msg)
return loaded
def read_seeded(base="", ext="", timeout=5, retries=10, file_retries=0):
if base.startswith("/"):
base = "file://%s" % base
# default retries for file is 0. for network is 10
if base.startswith("file://"):
retries = file_retries
if base.find("%s") >= 0:
ud_url = base % ("user-data" + ext)
md_url = base % ("meta-data" + ext)
else:
ud_url = "%s%s%s" % (base, "user-data", ext)
md_url = "%s%s%s" % (base, "meta-data", ext)
md_resp = url_helper.read_file_or_url(md_url, timeout, retries,
file_retries)
md = None
if md_resp.ok():
md = load_yaml(decode_binary(md_resp.contents), default={})
ud_resp = url_helper.read_file_or_url(ud_url, timeout, retries,
file_retries)
ud = None
if ud_resp.ok():
ud = ud_resp.contents
return (md, ud)
def read_conf_d(confd):
# Get reverse sorted list (later trumps newer)
confs = sorted(os.listdir(confd), reverse=True)