98 lines
3.0 KiB
Python
98 lines
3.0 KiB
Python
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# Copyright 2016 Andreas Florath (andreas@florath.net)
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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# Python Logging Configuration for DIB
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# Usage:
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# In the main (application) file, do an
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# import logging_config
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# ...
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# logging_config.setup()
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# It is then possible to use the normal python logging interface, like
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# logger = logging.getLogger(__name__)
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# logger.info("Info Message")
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import json
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import logging
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import logging.config
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import os
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import sys
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# A simple formatter to more or less copy oslo.log's ContextFormatter
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class DibFormatter(logging.Formatter):
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def __init__(self, *args, **kwargs):
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self.fmt = kwargs['fmt']
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self.debug_suffix = kwargs.pop('debug_suffix')
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logging.Formatter.__init__(self, *args, **kwargs)
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def format(self, record):
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if record.levelno == logging.DEBUG:
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fmt = self.fmt + self.debug_suffix
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else:
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fmt = self.fmt
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if sys.version_info < (3, 2):
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self._fmt = fmt
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else:
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self._style = logging.PercentStyle(fmt)
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self._fmt = self._style._fmt
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return logging.Formatter.format(self, record)
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def setup():
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# Check for the DIB_DEBUG_TRACE environment variable
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# If it is set to something greater then 0, use debug
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# logging.
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LOG_LEVEL = "DEBUG" if 'DIB_DEBUG_TRACE' in os.environ \
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and int(os.environ['DIB_DEBUG_TRACE']) > 0 else "INFO"
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# Default logging configuration which can be overwritten
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# by a config file passed in by a user.
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PYTHON_LOGGING_CONFIG = {
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'version': 1,
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'disable_existing_loggers': False,
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'formatters': {
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'standard': {
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'()': 'diskimage_builder.logging_config.DibFormatter',
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'datefmt': '%Y-%m-%d %H:%M:%S',
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'fmt': '%(asctime)s.%(msecs)03d %(levelname)s '
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'%(name)s [-] %(message)s',
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'debug_suffix': ' %(funcName)s %(pathname)s:%(lineno)d'
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}
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},
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'handlers': {
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'default': {
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'level': LOG_LEVEL,
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'class': 'logging.StreamHandler',
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'formatter': 'standard',
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}
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},
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'loggers': {
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'': {
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'handlers': ['default'],
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'level': LOG_LEVEL,
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'propagate': True
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}
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}
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}
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if 'DIB_PYTHON_LOGGING_CONFIG_FILE' in os.environ:
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with open(os.environ['DIB_PYTHON_LOGGING_CONFIG_FILE']) as fd:
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PYTHON_LOGGING_CONFIG = json.load(fd)
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logging.config.dictConfig(PYTHON_LOGGING_CONFIG)
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