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# -*- coding: utf-8 -*- |
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# |
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# This file is part of Glances. |
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# |
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# Copyright (C) 2015 Nicolargo <[email protected]> |
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# |
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# Glances is free software; you can redistribute it and/or modify |
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# it under the terms of the GNU Lesser General Public License as published by |
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# the Free Software Foundation, either version 3 of the License, or |
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# (at your option) any later version. |
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# |
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# Glances is distributed in the hope that it will be useful, |
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# but WITHOUT ANY WARRANTY; without even the implied warranty of |
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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# GNU Lesser General Public License for more details. |
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# |
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# You should have received a copy of the GNU Lesser General Public License |
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# along with this program. If not, see <http://www.gnu.org/licenses/>. |
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"""Custom logger class.""" |
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import logging |
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import os |
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import tempfile |
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import json |
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from logging.config import dictConfig |
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# Define the logging configuration |
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LOGGING_CFG = { |
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"version": 1, |
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"disable_existing_loggers": "False", |
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"root": { |
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"level": "INFO", |
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"handlers": ["file", "console"] |
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}, |
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"formatters": { |
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"standard": { |
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"format": "%(asctime)s -- %(levelname)s -- %(message)s" |
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}, |
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"short": { |
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"format": "%(levelname)s: %(message)s" |
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}, |
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"free": { |
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"format": "%(message)s" |
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} |
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}, |
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"handlers": { |
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"file": { |
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"level": "DEBUG", |
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"class": "logging.handlers.RotatingFileHandler", |
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"formatter": "standard", |
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'filename': os.path.join(tempfile.gettempdir(), 'glances.log') |
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}, |
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"console": { |
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"level": "CRITICAL", |
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"class": "logging.StreamHandler", |
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"formatter": "free" |
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} |
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}, |
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"loggers": { |
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"debug": { |
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"handlers": ["file", "console"], |
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"level": "DEBUG" |
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}, |
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"verbose": { |
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"handlers": ["file", "console"], |
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"level": "INFO" |
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}, |
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"standard": { |
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"handlers": ["file"], |
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"level": "INFO" |
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}, |
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"requests": { |
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"handlers": ["file", "console"], |
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"level": "ERROR" |
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}, |
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"elasticsearch": { |
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"handlers": ["file", "console"], |
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"level": "ERROR" |
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}, |
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"elasticsearch.trace": { |
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"handlers": ["file", "console"], |
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"level": "ERROR" |
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} |
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} |
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} |
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def tempfile_name(): |
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"""Return the tempfile name (full path).""" |
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ret = os.path.join(tempfile.gettempdir(), 'glances.log') |
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if os.access(ret, os.F_OK) and not os.access(ret, os.W_OK): |
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print("WARNING: Couldn't write to log file {} (Permission denied)".format(ret)) |
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ret = tempfile.mkstemp(prefix='glances', suffix='.log', text=True) |
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print("Create a new log file: {}".format(ret[1])) |
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return ret[1] |
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return ret |
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def glances_logger(env_key='LOG_CFG'): |
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"""Build and return the logger. |
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env_key define the env var where a path to a specific JSON logger |
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could be defined |
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:return: logger -- Logger instance |
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""" |
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_logger = logging.getLogger() |
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# Overwrite the default logger file |
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LOGGING_CFG['handlers']['file']['filename'] = tempfile_name() |
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# By default, use the LOGGING_CFG lgger configuration |
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config = LOGGING_CFG |
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# Check if a specific configuration is available |
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user_file = os.getenv(env_key, None) |
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if user_file and os.path.exists(user_file): |
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# A user file as been defined. Use it... |
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with open(user_file, 'rt') as f: |
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config = json.load(f) |
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# Load the configuration |
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dictConfig(config) |
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return _logger |
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logger = glances_logger() |
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nicolargo /
glances
