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# Copyright (C) 2011 Nippon Telegraph and Telephone Corporation.
# Copyright (C) 2011 Isaku Yamahata <yamahata at valinux co jp>
#
# 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.
from os_ken import cfg
import inspect
import platform
import logging
import logging.config
import logging.handlers
import os
import sys
try:
import ConfigParser
except ImportError:
import configparser as ConfigParser
CONF = cfg.CONF
CONF.register_cli_opts([
cfg.IntOpt('default-log-level', default=None, help='default log level'),
cfg.BoolOpt('verbose', default=False, help='show debug output'),
cfg.BoolOpt('use-stderr', default=True, help='log to standard error'),
cfg.BoolOpt('use-syslog', default=False, help='output to syslog'),
cfg.StrOpt('log-dir', default=None, help='log file directory'),
cfg.StrOpt('log-file', default=None, help='log file name'),
cfg.StrOpt('log-file-mode', default='0644',
help='default log file permission'),
cfg.StrOpt('log-config-file', default=None,
help='Path to a logging config file to use')
])
_EARLY_LOG_HANDLER = None
def early_init_log(level=None):
global _EARLY_LOG_HANDLER
_EARLY_LOG_HANDLER = logging.StreamHandler(sys.stderr)
log = logging.getLogger()
log.addHandler(_EARLY_LOG_HANDLER)
if level is not None:
log.setLevel(level)
def _get_log_file():
if CONF.log_file:
return CONF.log_file
if CONF.log_dir:
return os.path.join(CONF.log_dir,
os.path.basename(inspect.stack()[-1][1])) + '.log'
return None
def init_log():
global _EARLY_LOG_HANDLER
log = logging.getLogger()
if CONF.log_config_file:
try:
logging.config.fileConfig(CONF.log_config_file,
disable_existing_loggers=False)
except ConfigParser.Error as e:
print('Failed to parse %s: %s' % (CONF.log_config_file, e),
file=sys.stderr)
sys.exit(2)
return
if CONF.use_stderr:
log.addHandler(logging.StreamHandler(sys.stderr))
if _EARLY_LOG_HANDLER is not None:
log.removeHandler(_EARLY_LOG_HANDLER)
_EARLY_LOG_HANDLER = None
if CONF.use_syslog:
if platform.system() == 'Darwin':
address = '/var/run/syslog'
else:
address = '/dev/log'
syslog = logging.handlers.SysLogHandler(address=address)
log.addHandler(syslog)
log_file = _get_log_file()
if log_file is not None:
log.addHandler(logging.handlers.WatchedFileHandler(log_file))
mode = int(CONF.log_file_mode, 8)
os.chmod(log_file, mode)
if CONF.default_log_level is not None:
log.setLevel(CONF.default_log_level)
elif CONF.verbose:
log.setLevel(logging.DEBUG)
else:
log.setLevel(logging.INFO)
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