/usr/lib/python2.7/dist-packages/oslo_log/formatters.py is in python-oslo.log 3.2.0-2.
This file is owned by root:root, with mode 0o644.
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# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# 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.
import datetime
import itertools
import logging
import logging.config
import logging.handlers
import socket
import sys
import traceback
from dateutil import tz
import six
from six import moves
from oslo_context import context as context_utils
from oslo_serialization import jsonutils
def _dictify_context(context):
if context is None:
return {}
if not isinstance(context, dict) and getattr(context, 'to_dict', None):
context = context.to_dict()
return context
# A configuration object is given to us when the application registers
# the logging options.
_CONF = None
def _store_global_conf(conf):
global _CONF
_CONF = conf
def _update_record_with_context(record):
"""Given a log record, update it with context information.
The request context, if there is one, will either be in the
extra values for the incoming record or in the global
thread-local store.
"""
context = record.__dict__.get(
'context',
context_utils.get_current()
)
d = _dictify_context(context)
# Copy the context values directly onto the record so they can be
# used by the formatting strings.
for k, v in d.items():
setattr(record, k, v)
return context
class _ReplaceFalseValue(dict):
def __getitem__(self, key):
return dict.get(self, key, None) or '-'
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
try:
self.hostname = socket.gethostname()
except socket.error:
self.hostname = None
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),
'name': record.name,
'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,
'hostname': self.hostname}
# Build the extra values that were given to us, including
# the context.
context = _update_record_with_context(record)
if hasattr(record, 'extra'):
extra = record.extra.copy()
else:
extra = {}
for key in getattr(record, 'extra_keys', []):
if key not in extra:
extra[key] = getattr(record, key)
# If we saved a context object, explode it into the extra
# dictionary because the values are more useful than the
# object reference.
if 'context' in extra:
extra.update(_dictify_context(context))
del extra['context']
message['extra'] = extra
if record.exc_info:
message['traceback'] = self.formatException(record.exc_info)
return jsonutils.dumps(message)
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
debug.
The standard variables available to the formatter are listed at:
http://docs.python.org/library/logging.html#formatter
In addition to the standard variables, one custom variable is
available to both formatting string: `isotime` produces a
timestamp in ISO8601 format, suitable for producing
RFC5424-compliant log messages.
Furthermore, logging_context_format_string has access to all of
the data in a dict representation of the context.
If available, uses the context value stored in TLS - local.store.context
"""
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')
self.conf = kwargs.pop('config', _CONF)
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
# FIXME(dims): We need a better way to pick up the instance
# or instance_uuid parameters from the kwargs from say
# LOG.info or LOG.warn
instance_extra = ''
instance = getattr(record, 'instance', None)
instance_uuid = getattr(record, 'instance_uuid', None)
context = _update_record_with_context(record)
if instance:
try:
instance_extra = (self.conf.instance_format
% instance)
except TypeError:
instance_extra = instance
elif instance_uuid:
instance_extra = (self.conf.instance_uuid_format
% {'uuid': instance_uuid})
elif context:
# FIXME(dhellmann): We should replace these nova-isms with
# more generic handling in the Context class. See the
# app-agnostic-logging-parameters blueprint.
instance = getattr(context, 'instance', None)
instance_uuid = getattr(context, 'instance_uuid', None)
# resource_uuid was introduced in oslo_context's
# RequestContext
resource_uuid = getattr(context, 'resource_uuid', None)
if instance:
instance_extra = (self.conf.instance_format
% {'uuid': instance})
elif instance_uuid:
instance_extra = (self.conf.instance_uuid_format
% {'uuid': instance_uuid})
elif resource_uuid:
instance_extra = (self.conf.instance_uuid_format
% {'uuid': resource_uuid})
record.instance = instance_extra
# 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', 'resource',
'user_name', 'project_name'):
if key not in record.__dict__:
record.__dict__[key] = ''
# Set the "user_identity" value of "logging_context_format_string"
# by using "logging_user_identity_format" and
# "to_dict()" of oslo.context.
if context:
record.user_identity = (
self.conf.logging_user_identity_format %
_ReplaceFalseValue(context.__dict__)
)
if record.__dict__.get('request_id'):
fmt = self.conf.logging_context_format_string
else:
fmt = self.conf.logging_default_format_string
if (record.levelno == logging.DEBUG and
self.conf.logging_debug_format_suffix):
fmt += " " + self.conf.logging_debug_format_suffix
self._compute_iso_time(record)
if sys.version_info < (3, 2):
self._fmt = fmt
else:
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')
stringbuffer.close()
if self.conf.logging_exception_prefix.find('%(asctime)') != -1:
record.asctime = self.formatTime(record, self.datefmt)
self._compute_iso_time(record)
formatted_lines = []
for line in lines:
pl = self.conf.logging_exception_prefix % record.__dict__
fl = '%s%s' % (pl, line)
formatted_lines.append(fl)
return '\n'.join(formatted_lines)
def _compute_iso_time(self, record):
# set iso8601 timestamp
localtz = tz.tzlocal()
record.isotime = datetime.datetime.fromtimestamp(
record.created).replace(tzinfo=localtz).isoformat()
if record.created == int(record.created):
# NOTE(stpierre): when the timestamp includes no
# microseconds -- e.g., 1450274066.000000 -- then the
# microseconds aren't included in the isoformat() time. As
# a result, in literally one in a million cases
# isoformat() looks different. This adds microseconds when
# that happens.
record.isotime = "%s.000000%s" % (record.isotime[:-6],
record.isotime[-6:])
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