# vim: tabstop=4 shiftwidth=4 softtabstop=4 # Copyright 2011 OpenStack LLC. # 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 # # 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. """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 cStringIO import inspect import itertools import logging import logging.config import logging.handlers import os import stat import sys import traceback from quantum.openstack.common import cfg from quantum.openstack.common.gettextutils import _ from quantum.openstack.common import jsonutils from quantum.openstack.common import local from quantum.openstack.common import notifier log_opts = [ cfg.StrOpt('logging_context_format_string', default='%(asctime)s %(levelname)s %(name)s [%(request_id)s ' '%(user_id)s %(project_id)s] %(instance)s' '%(message)s', help='format string to use for log messages with context'), cfg.StrOpt('logging_default_format_string', default='%(asctime)s %(levelname)s %(name)s [-] %(instance)s' '%(message)s', help='format string to use for log messages without context'), cfg.StrOpt('logging_debug_format_suffix', default='from (pid=%(process)d) %(funcName)s ' '%(pathname)s:%(lineno)d', help='data to append to log format when level is DEBUG'), cfg.StrOpt('logging_exception_prefix', default='%(asctime)s TRACE %(name)s %(instance)s', help='prefix each line of exception output with this format'), cfg.ListOpt('default_log_levels', default=[ 'amqplib=WARN', 'sqlalchemy=WARN', 'boto=WARN', 'suds=INFO', 'keystone=INFO', 'eventlet.wsgi.server=WARN' ], help='list of logger=LEVEL pairs'), cfg.BoolOpt('publish_errors', default=False, help='publish error events'), # 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. cfg.StrOpt('instance_format', default='[instance: %(uuid)s] ', help='If an instance is passed with the log message, format ' 'it like this'), cfg.StrOpt('instance_uuid_format', default='[instance: %(uuid)s] ', help='If an instance UUID is passed with the log message, ' 'format it like this'), ] generic_log_opts = [ cfg.StrOpt('logdir', default=None, help='Log output to a per-service log file in named directory'), cfg.StrOpt('logfile', default=None, help='Log output to a named file'), cfg.BoolOpt('use_stderr', default=True, help='Log output to standard error'), cfg.StrOpt('logfile_mode', default='0644', help='Default file mode used when creating log files'), ] CONF = cfg.CONF CONF.register_opts(generic_log_opts) CONF.register_opts(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') try: NullHandler = logging.NullHandler except AttributeError: # NOTE(jkoelker) NullHandler added in Python 2.7 class NullHandler(logging.Handler): def handle(self, record): pass def emit(self, record): pass 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 or CONF.logfile logdir = CONF.log_dir or CONF.logdir 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),) class ContextAdapter(logging.LoggerAdapter): warn = logging.LoggerAdapter.warning def __init__(self, logger, project_name, version_string): self.logger = logger self.project = project_name self.version = version_string def audit(self, msg, *args, **kwargs): self.log(logging.AUDIT, msg, *args, **kwargs) def process(self, msg, kwargs): if 'extra' not in kwargs: kwargs['extra'] = {} extra = kwargs['extra'] context = kwargs.pop('context', None) if not context: context = getattr(local.store, 'context', None) if context: extra.update(_dictify_context(context)) instance = kwargs.pop('instance', None) instance_extra = '' if instance: instance_extra = CONF.instance_format % instance else: instance_uuid = kwargs.pop('instance_uuid', None) if instance_uuid: instance_extra = (CONF.instance_uuid_format % {'uuid': instance_uuid}) extra.update({'instance': instance_extra}) extra.update({"project": self.project}) extra.update({"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 = [itertools.ifilter( 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} if hasattr(record, 'extra'): message['extra'] = record.extra if record.exc_info: message['traceback'] = self.formatException(record.exc_info) return jsonutils.dumps(message) class PublishErrorsHandler(logging.Handler): def emit(self, record): if ('quantum.openstack.common.notifier.log_notifier' in CONF.notification_driver): return notifier.api.notify(None, 'error.publisher', 'error_notification', notifier.api.ERROR, dict(error=record.msg)) def _create_logging_excepthook(product_name): def logging_excepthook(type, value, tb): extra = {} if CONF.verbose: extra['exc_info'] = (type, value, tb) getLogger(product_name).critical(str(value), **extra) return logging_excepthook def setup(product_name): """Setup logging.""" sys.excepthook = _create_logging_excepthook(product_name) if CONF.log_config: try: logging.config.fileConfig(CONF.log_config) except Exception: traceback.print_exc() raise else: _setup_logging_from_conf(product_name) def _find_facility_from_conf(): facility_names = logging.handlers.SysLogHandler.facility_names facility = getattr(logging.handlers.SysLogHandler, CONF.syslog_log_facility, None) 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() consts = ['LOG_AUTH', 'LOG_AUTHPRIV', 'LOG_CRON', 'LOG_DAEMON', 'LOG_FTP', 'LOG_KERN', 'LOG_LPR', 'LOG_MAIL', 'LOG_NEWS', 'LOG_AUTH', 'LOG_SYSLOG', 'LOG_USER', 'LOG_UUCP', 'LOG_LOCAL0', 'LOG_LOCAL1', 'LOG_LOCAL2', 'LOG_LOCAL3', 'LOG_LOCAL4', 'LOG_LOCAL5', 'LOG_LOCAL6', 'LOG_LOCAL7'] valid_facilities.extend(consts) raise TypeError(_('syslog facility must be one of: %s') % ', '.join("'%s'" % fac for fac in valid_facilities)) return facility def _setup_logging_from_conf(product_name): log_root = getLogger(product_name).logger for handler in log_root.handlers: log_root.removeHandler(handler) if CONF.use_syslog: facility = _find_facility_from_conf() syslog = logging.handlers.SysLogHandler(address='/dev/log', facility=facility) log_root.addHandler(syslog) logpath = _get_log_file_path() if logpath: filelog = logging.handlers.WatchedFileHandler(logpath) log_root.addHandler(filelog) mode = int(CONF.logfile_mode, 8) st = os.stat(logpath) if st.st_mode != (stat.S_IFREG | mode): os.chmod(logpath, mode) if CONF.use_stderr: streamlog = ColorHandler() log_root.addHandler(streamlog) elif not CONF.log_file: # pass sys.stdout as a positional argument # python2.6 calls the argument strm, in 2.7 it's stream streamlog = logging.StreamHandler(sys.stdout) log_root.addHandler(streamlog) if CONF.publish_errors: log_root.addHandler(PublishErrorsHandler(logging.ERROR)) for handler in log_root.handlers: datefmt = CONF.log_date_format if CONF.log_format: handler.setFormatter(logging.Formatter(fmt=CONF.log_format, datefmt=datefmt)) handler.setFormatter(LegacyFormatter(datefmt=datefmt)) if CONF.verbose or CONF.debug: log_root.setLevel(logging.DEBUG) else: log_root.setLevel(logging.INFO) level = logging.NOTSET for pair in CONF.default_log_levels: mod, _sep, level_name = pair.partition('=') level = logging.getLevelName(level_name) logger = logging.getLogger(mod) logger.setLevel(level) for handler in log_root.handlers: logger.addHandler(handler) _loggers = {} def getLogger(name='unknown', version='unknown'): if name not in _loggers: _loggers[name] = ContextAdapter(logging.getLogger(name), name, version) return _loggers[name] 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) class LegacyFormatter(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. For information about what variables are available for the formatter see: http://docs.python.org/library/logging.html#formatter """ def format(self, record): """Uses contextstring if request_id is set, otherwise default.""" # NOTE(sdague): default the fancier formating params # to an empty string so we don't throw an exception if # they get used for key in ('instance', 'color'): if key not in record.__dict__: record.__dict__[key] = '' if record.__dict__.get('request_id', None): self._fmt = CONF.logging_context_format_string else: self._fmt = CONF.logging_default_format_string if (record.levelno == logging.DEBUG and CONF.logging_debug_format_suffix): self._fmt += " " + CONF.logging_debug_format_suffix # Cache this on the record, Logger will respect our formated 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 = cStringIO.StringIO() traceback.print_exception(exc_info[0], exc_info[1], exc_info[2], None, stringbuffer) lines = stringbuffer.getvalue().split('\n') stringbuffer.close() 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) formatted_lines.append(fl) return '\n'.join(formatted_lines) class ColorHandler(logging.StreamHandler): LEVEL_COLORS = { 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)