Import oslo-incubator's logging library

We need the logging library brought in.

Change-Id: I8c02c1598e4a2fea63e28c8ffb809d28981993ed
Steven Dake 9 years ago
parent 640d342f9d
commit 290597d7ff

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# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
"""oslo.i18n integration module.
import oslo.i18n
# NOTE(dhellmann): This reference to o-s-l-o will be replaced by the
# application name when this module is synced into the separate
# repository. It is OK to have more than one translation function
# using the same domain, since there will still only be one message
# catalog.
_translators = oslo.i18n.TranslatorFactory(domain='magnum')
# The primary translation function using the well-known name "_"
_ = _translators.primary
# Translators for log levels.
# The abbreviated names are meant to reflect the usual use of a short
# name like '_'. The "L" is for "log" and the other letter comes from
# the level.
_LI = _translators.log_info
_LW = _translators.log_warning
_LE = _translators.log_error
_LC = _translators.log_critical

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# Copyright 2011 OpenStack Foundation.
# All Rights Reserved.
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
"""Local storage of variables using weak references"""
import threading
import weakref
class WeakLocal(threading.local):
def __getattribute__(self, attr):
rval = super(WeakLocal, self).__getattribute__(attr)
if rval:
# NOTE(mikal): this bit is confusing. What is stored is a weak
# reference, not the value itself. We therefore need to lookup
# the weak reference and return the inner value here.
rval = rval()
return rval
def __setattr__(self, attr, value):
value = weakref.ref(value)
return super(WeakLocal, self).__setattr__(attr, value)
# NOTE(mikal): the name "store" should be deprecated in the future
store = WeakLocal()
# A "weak" store uses weak references and allows an object to fall out of scope
# when it falls out of scope in the code that uses the thread local storage. A
# "strong" store will hold a reference to the object so that it never falls out
# of scope.
weak_store = WeakLocal()
strong_store = threading.local()

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# Copyright 2011 OpenStack Foundation.
# Copyright 2010 United States Government as represented by the
# Administrator of the National Aeronautics and Space Administration.
# All Rights Reserved.
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
"""OpenStack logging handler.
This module adds to logging functionality by adding the option to specify
a context object when calling the various log methods. If the context object
is not specified, default formatting is used. Additionally, an instance uuid
may be passed as part of the log message, which is intended to make it easier
for admins to find messages related to a specific instance.
It also allows setting of formatting information through conf.
import copy
import inspect
import itertools
import logging
import logging.config
import logging.handlers
import os
import socket
import sys
import traceback
from oslo.config import cfg
from oslo.serialization import jsonutils
from oslo.utils import importutils
import six
from six import moves
_PY26 = sys.version_info[0:2] == (2, 6)
from magnum.openstack.common._i18n import _
from magnum.openstack.common import local
common_cli_opts = [
help='Print debugging output (set logging level to '
'DEBUG instead of default WARNING level).'),
help='Print more verbose output (set logging level to '
'INFO instead of default WARNING level).'),
logging_cli_opts = [
help='The name of a logging configuration file. This file '
'is appended to any existing logging configuration '
'files. For details about logging configuration files, '
'see the Python logging module documentation.'),
'A logging.Formatter log message format string which may '
'use any of the available logging.LogRecord attributes. '
'This option is deprecated. Please use '
'logging_context_format_string and '
'logging_default_format_string instead.'),
help='Format string for %%(asctime)s in log records. '
'Default: %(default)s .'),
help='(Optional) Name of log file to output to. '
'If no default is set, logging will go to stdout.'),
help='(Optional) The base directory used for relative '
'--log-file paths.'),
help='Use syslog for logging. '
'Existing syslog format is DEPRECATED during I, '
'and will change in J to honor RFC5424.'),
# TODO(bogdando) remove or use True after existing
# syslog format deprecation in J
help='(Optional) Enables or disables syslog rfc5424 format '
'for logging. If enabled, prefixes the MSG part of the '
'syslog message with APP-NAME (RFC5424). The '
'format without the APP-NAME is deprecated in I, '
'and will be removed in J.'),
help='Syslog facility to receive log lines.')
generic_log_opts = [
help='Log output to standard error.')
DEFAULT_LOG_LEVELS = ['amqp=WARN', 'amqplib=WARN', 'boto=WARN',
'qpid=WARN', 'sqlalchemy=WARN', 'suds=INFO',
'oslo.messaging=INFO', 'iso8601=WARN',
'urllib3.connectionpool=WARN', 'websocket=WARN',
"keystonemiddleware=WARN", "routes.middleware=WARN",
log_opts = [
default='%(asctime)s.%(msecs)03d %(process)d %(levelname)s '
'%(name)s [%(request_id)s %(user_identity)s] '
help='Format string to use for log messages with context.'),
default='%(asctime)s.%(msecs)03d %(process)d %(levelname)s '
'%(name)s [-] %(instance)s%(message)s',
help='Format string to use for log messages without context.'),
default='%(funcName)s %(pathname)s:%(lineno)d',
help='Data to append to log format when level is DEBUG.'),
default='%(asctime)s.%(msecs)03d %(process)d TRACE %(name)s '
help='Prefix each line of exception output with this format.'),
help='List of logger=LEVEL pairs.'),
help='Enables or disables publication of error events.'),
help='Enables or disables fatal status of deprecations.'),
# NOTE(mikal): there are two options here because sometimes we are handed
# a full instance (and could include more information), and other times we
# are just handed a UUID for the instance.
default='[instance: %(uuid)s] ',
help='The format for an instance that is passed with the log '
default='[instance: %(uuid)s] ',
help='The format for an instance UUID that is passed with the '
'log message.'),
def list_opts():
"""Entry point for oslo.config-generator."""
return [(None, copy.deepcopy(common_cli_opts)),
(None, copy.deepcopy(logging_cli_opts)),
(None, copy.deepcopy(generic_log_opts)),
(None, copy.deepcopy(log_opts)),
# our new audit level
# NOTE(jkoelker) Since we synthesized an audit level, make the logging
# module aware of it so it acts like other levels.
logging.AUDIT = logging.INFO + 1
logging.addLevelName(logging.AUDIT, 'AUDIT')
NullHandler = logging.NullHandler
except AttributeError: # NOTE(jkoelker) NullHandler added in Python 2.7
class NullHandler(logging.Handler):
def handle(self, record):
def emit(self, record):
def createLock(self):
self.lock = None
def _dictify_context(context):
if context is None:
return None
if not isinstance(context, dict) and getattr(context, 'to_dict', None):
context = context.to_dict()
return context
def _get_binary_name():
return os.path.basename(inspect.stack()[-1][1])
def _get_log_file_path(binary=None):
logfile = CONF.log_file
logdir = CONF.log_dir
if logfile and not logdir:
return logfile
if logfile and logdir:
return os.path.join(logdir, logfile)
if logdir:
binary = binary or _get_binary_name()
return '%s.log' % (os.path.join(logdir, binary),)
return None
class BaseLoggerAdapter(logging.LoggerAdapter):
def audit(self, msg, *args, **kwargs):
self.log(logging.AUDIT, msg, *args, **kwargs)
def isEnabledFor(self, level):
if _PY26:
# This method was added in python 2.7 (and it does the exact
# same logic, so we need to do the exact same logic so that
# python 2.6 has this capability as well).
return self.logger.isEnabledFor(level)
return super(BaseLoggerAdapter, self).isEnabledFor(level)
class LazyAdapter(BaseLoggerAdapter):
def __init__(self, name='unknown', version='unknown'):
self._logger = None
self.extra = {} = name
self.version = version
def logger(self):
if not self._logger:
self._logger = getLogger(, self.version)
if six.PY3:
# In Python 3, the code fails because the 'manager' attribute
# cannot be found when using a LoggerAdapter as the
# underlying logger. Work around this issue.
self._logger.manager = self._logger.logger.manager
return self._logger
class ContextAdapter(BaseLoggerAdapter):
warn = logging.LoggerAdapter.warning
def __init__(self, logger, project_name, version_string):
self.logger = logger
self.project = project_name
self.version = version_string
self._deprecated_messages_sent = dict()
def handlers(self):
return self.logger.handlers
def deprecated(self, msg, *args, **kwargs):
"""Call this method when a deprecated feature is used.
If the system is configured for fatal deprecations then the message
is logged at the 'critical' level and :class:`DeprecatedConfig` will
be raised.
Otherwise, the message will be logged (once) at the 'warn' level.
:raises: :class:`DeprecatedConfig` if the system is configured for
fatal deprecations.
stdmsg = _("Deprecated: %s") % msg
if CONF.fatal_deprecations:
self.critical(stdmsg, *args, **kwargs)
raise DeprecatedConfig(msg=stdmsg)
# Using a list because a tuple with dict can't be stored in a set.
sent_args = self._deprecated_messages_sent.setdefault(msg, list())
if args in sent_args:
# Already logged this message, so don't log it again.
self.warn(stdmsg, *args, **kwargs)
def process(self, msg, kwargs):
# NOTE(jecarey): If msg is not unicode, coerce it into unicode
# before it can get to the python logging and
# possibly cause string encoding trouble
if not isinstance(msg, six.text_type):
msg = six.text_type(msg)
if 'extra' not in kwargs:
kwargs['extra'] = {}
extra = kwargs['extra']
context = kwargs.pop('context', None)
if not context:
context = getattr(, 'context', None)
if context:
instance = kwargs.pop('instance', None)
instance_uuid = (extra.get('instance_uuid') or
kwargs.pop('instance_uuid', None))
instance_extra = ''
if instance:
instance_extra = CONF.instance_format % instance
elif instance_uuid:
instance_extra = (CONF.instance_uuid_format
% {'uuid': instance_uuid})
extra['instance'] = instance_extra
extra.setdefault('user_identity', kwargs.pop('user_identity', None))
extra['project'] = self.project
extra['version'] = self.version
extra['extra'] = extra.copy()
return msg, kwargs
class JSONFormatter(logging.Formatter):
def __init__(self, fmt=None, datefmt=None):
# NOTE(jkoelker) we ignore the fmt argument, but its still there
# since logging.config.fileConfig passes it.
self.datefmt = datefmt
def formatException(self, ei, strip_newlines=True):
lines = traceback.format_exception(*ei)
if strip_newlines:
lines = [moves.filter(
lambda x: x,
line.rstrip().splitlines()) for line in lines]
lines = list(itertools.chain(*lines))
return lines
def format(self, record):
message = {'message': record.getMessage(),
'asctime': self.formatTime(record, self.datefmt),
'msg': record.msg,
'args': record.args,
'levelname': record.levelname,
'levelno': record.levelno,
'pathname': record.pathname,
'filename': record.filename,
'module': record.module,
'lineno': record.lineno,
'funcname': record.funcName,
'created': record.created,
'msecs': record.msecs,
'relative_created': record.relativeCreated,
'thread': record.thread,
'thread_name': record.threadName,
'process_name': record.processName,
'process': record.process,
'traceback': None}
if hasattr(record, 'extra'):
message['extra'] = record.extra
if record.exc_info:
message['traceback'] = self.formatException(record.exc_info)
return jsonutils.dumps(message)
def _create_logging_excepthook(product_name):
def logging_excepthook(exc_type, value, tb):
extra = {'exc_info': (exc_type, value, tb)}
"".join(traceback.format_exception_only(exc_type, value)),
return logging_excepthook
class LogConfigError(Exception):
message = _('Error loading logging config %(log_config)s: %(err_msg)s')
def __init__(self, log_config, err_msg):
self.log_config = log_config
self.err_msg = err_msg
def __str__(self):
return self.message % dict(log_config=self.log_config,
def _load_log_config(log_config_append):
except (moves.configparser.Error, KeyError) as exc:
raise LogConfigError(log_config_append, six.text_type(exc))
def setup(product_name, version='unknown'):
"""Setup logging."""
if CONF.log_config_append:
_setup_logging_from_conf(product_name, version)
sys.excepthook = _create_logging_excepthook(product_name)
def set_defaults(logging_context_format_string=None,
# Just in case the caller is not setting the
# default_log_level. This is insurance because
# we introduced the default_log_level parameter
# later in a backwards in-compatible change
if default_log_levels is not None:
if logging_context_format_string is not None:
def _find_facility_from_conf():
facility_names = logging.handlers.SysLogHandler.facility_names
facility = getattr(logging.handlers.SysLogHandler,
if facility is None and CONF.syslog_log_facility in facility_names:
facility = facility_names.get(CONF.syslog_log_facility)
if facility is None:
valid_facilities = facility_names.keys()
raise TypeError(_('syslog facility must be one of: %s') %
', '.join("'%s'" % fac
for fac in valid_facilities))
return facility
class RFCSysLogHandler(logging.handlers.SysLogHandler):
def __init__(self, *args, **kwargs):
self.binary_name = _get_binary_name()
# Do not use super() unless type(logging.handlers.SysLogHandler)
# is 'type' (Python 2.7).
# Use old style calls, if the type is 'classobj' (Python 2.6)
logging.handlers.SysLogHandler.__init__(self, *args, **kwargs)
def format(self, record):
# Do not use super() unless type(logging.handlers.SysLogHandler)
# is 'type' (Python 2.7).
# Use old style calls, if the type is 'classobj' (Python 2.6)
msg = logging.handlers.SysLogHandler.format(self, record)
msg = self.binary_name + ' ' + msg
return msg
def _setup_logging_from_conf(project, version):
log_root = getLogger(None).logger
for handler in log_root.handlers:
logpath = _get_log_file_path()
if logpath:
filelog = logging.handlers.WatchedFileHandler(logpath)
if CONF.use_stderr:
streamlog = ColorHandler()
elif not logpath:
# pass sys.stdout as a positional argument
# python2.6 calls the argument strm, in 2.7 it's stream
streamlog = logging.StreamHandler(sys.stdout)
if CONF.publish_errors:
handler = importutils.import_object(
datefmt = CONF.log_date_format
for handler in log_root.handlers:
# NOTE(alaski): CONF.log_format overrides everything currently. This
# should be deprecated in favor of context aware formatting.
if CONF.log_format:
datefmt=datefmt))'Deprecated: log_format is now deprecated and will '
'be removed in the next release')
if CONF.debug:
elif CONF.verbose:
for pair in CONF.default_log_levels:
mod, _sep, level_name = pair.partition('=')
logger = logging.getLogger(mod)
# NOTE(AAzza) in python2.6 Logger.setLevel doesn't convert string name
# to integer code.
if sys.version_info < (2, 7):
level = logging.getLevelName(level_name)
if CONF.use_syslog:
facility = _find_facility_from_conf()
# TODO(bogdando) use the format provided by RFCSysLogHandler
# after existing syslog format deprecation in J
if CONF.use_syslog_rfc_format:
syslog = RFCSysLogHandler(facility=facility)
syslog = logging.handlers.SysLogHandler(facility=facility)
except socket.error:
log_root.error('Unable to add syslog handler. Verify that syslog '
'is running.')
_loggers = {}
def getLogger(name='unknown', version='unknown'):
if name not in _loggers:
_loggers[name] = ContextAdapter(logging.getLogger(name),
return _loggers[name]
def getLazyLogger(name='unknown', version='unknown'):
"""Returns lazy logger.
Creates a pass-through logger that does not create the real logger
until it is really needed and delegates all calls to the real logger
once it is created.
return LazyAdapter(name, version)
class WritableLogger(object):
"""A thin wrapper that responds to `write` and logs."""
def __init__(self, logger, level=logging.INFO):
self.logger = logger
self.level = level
def write(self, msg):
self.logger.log(self.level, msg.rstrip())
class ContextFormatter(logging.Formatter):
"""A context.RequestContext aware formatter configured through flags.
The flags used to set format strings are: logging_context_format_string
and logging_default_format_string. You can also specify
logging_debug_format_suffix to append extra formatting if the log level is
For information about what variables are available for the formatter see:
If available, uses the context value stored in TLS -
def __init__(self, *args, **kwargs):
"""Initialize ContextFormatter instance
Takes additional keyword arguments which can be used in the message
format string.
:keyword project: project name
:type project: string
:keyword version: project version
:type version: string
self.project = kwargs.pop('project', 'unknown')
self.version = kwargs.pop('version', 'unknown')
logging.Formatter.__init__(self, *args, **kwargs)
def format(self, record):
"""Uses contextstring if request_id is set, otherwise default."""
# NOTE(jecarey): If msg is not unicode, coerce it into unicode
# before it can get to the python logging and
# possibly cause string encoding trouble
if not isinstance(record.msg, six.text_type):
record.msg = six.text_type(record.msg)
# store project info
record.project = self.project
record.version = self.version
# store request info
context = getattr(, 'context', None)
if context:
d = _dictify_context(context)
for k, v in d.items():
setattr(record, k, v)
# NOTE(sdague): default the fancier formatting params
# to an empty string so we don't throw an exception if
# they get used
for key in ('instance', 'color', 'user_identity'):
if key not in record.__dict__:
record.__dict__[key] = ''
if record.__dict__.get('request_id'):
fmt = CONF.logging_context_format_string
fmt = CONF.logging_default_format_string
if (record.levelno == logging.DEBUG and
fmt += " " + CONF.logging_debug_format_suffix
if sys.version_info < (3, 2):
self._fmt = fmt
self._style = logging.PercentStyle(fmt)
self._fmt = self._style._fmt
# Cache this on the record, Logger will respect our formatted copy
if record.exc_info:
record.exc_text = self.formatException(record.exc_info, record)
return logging.Formatter.format(self, record)
def formatException(self, exc_info, record=None):
"""Format exception output with CONF.logging_exception_prefix."""
if not record:
return logging.Formatter.formatException(self, exc_info)
stringbuffer = moves.StringIO()
traceback.print_exception(exc_info[0], exc_info[1], exc_info[2],
None, stringbuffer)
lines = stringbuffer.getvalue().split('\n')
if CONF.logging_exception_prefix.find('%(asctime)') != -1:
record.asctime = self.formatTime(record, self.datefmt)
formatted_lines = []
for line in lines:
pl = CONF.logging_exception_prefix % record.__dict__
fl = '%s%s' % (pl, line)
return '\n'.join(formatted_lines)
class ColorHandler(logging.StreamHandler):
logging.DEBUG: '\033[00;32m', # GREEN
logging.INFO: '\033[00;36m', # CYAN
logging.AUDIT: '\033[01;36m', # BOLD CYAN
logging.WARN: '\033[01;33m', # BOLD YELLOW
logging.ERROR: '\033[01;31m', # BOLD RED
logging.CRITICAL: '\033[01;31m', # BOLD RED
def format(self, record):
record.color = self.LEVEL_COLORS[record.levelno]
return logging.StreamHandler.format(self, record)
class DeprecatedConfig(Exception):
message = _("Fatal call to deprecated config: %(msg)s")
def __init__(self, msg):
super(Exception, self).__init__(self.message % dict(msg=msg))

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# The list of modules to copy from oslo-incubator.git
# The base module to hold the copy of openstack.common