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# -*- coding: utf-8 -*-
#
# This file is part of Glances.
#
# SPDX-FileCopyrightText: 2022 Nicolas Hennion <nicolas@nicolargo.com>
#
# SPDX-License-Identifier: LGPL-3.0-only
#
"""Custom logger class."""
import os
import json
import getpass
import tempfile
import logging
import logging.config
from glances.globals import safe_makedirs
# Choose the good place for the log file (see issue #1575)
# Default root path
if 'HOME' in os.environ:
_XDG_CACHE_HOME = os.path.join(os.environ['HOME'], '.local', 'share')
else:
_XDG_CACHE_HOME = ''
# Define the glances log file
if (
'XDG_CACHE_HOME' in os.environ
and os.path.isdir(os.environ['XDG_CACHE_HOME'])
and os.access(os.environ['XDG_CACHE_HOME'], os.W_OK)
):
safe_makedirs(os.path.join(os.environ['XDG_CACHE_HOME'], 'glances'))
LOG_FILENAME = os.path.join(os.environ['XDG_CACHE_HOME'], 'glances', 'glances.log')
elif os.path.isdir(_XDG_CACHE_HOME) and os.access(_XDG_CACHE_HOME, os.W_OK):
safe_makedirs(os.path.join(_XDG_CACHE_HOME, 'glances'))
LOG_FILENAME = os.path.join(_XDG_CACHE_HOME, 'glances', 'glances.log')
else:
LOG_FILENAME = os.path.join(tempfile.gettempdir(), 'glances-{}.log'.format(getpass.getuser()))
# Define the logging configuration
LOGGING_CFG = {
"version": 1,
"disable_existing_loggers": "False",
"root": {"level": "INFO", "handlers": ["file", "console"]},
"formatters": {
"standard": {"format": "%(asctime)s -- %(levelname)s -- %(message)s"},
"short": {"format": "%(levelname)s -- %(message)s"},
"long": {"format": "%(asctime)s -- %(levelname)s -- %(message)s (%(funcName)s in %(filename)s)"},
"free": {"format": "%(message)s"},
},
"handlers": {
"file": {
"level": "DEBUG",
"class": "logging.handlers.RotatingFileHandler",
"maxBytes": 1000000,
"backupCount": 3,
"formatter": "standard",
"filename": LOG_FILENAME,
},
"console": {"level": "CRITICAL", "class": "logging.StreamHandler", "formatter": "free"},
},
"loggers": {
"debug": {"handlers": ["file", "console"], "level": "DEBUG"},
"verbose": {"handlers": ["file", "console"], "level": "INFO"},
"standard": {"handlers": ["file"], "level": "INFO"},
"requests": {"handlers": ["file", "console"], "level": "ERROR"},
"elasticsearch": {"handlers": ["file", "console"], "level": "ERROR"},
"elasticsearch.trace": {"handlers": ["file", "console"], "level": "ERROR"},
},
}
def glances_logger(env_key='LOG_CFG'):
"""Build and return the logger.
env_key define the env var where a path to a specific JSON logger
could be defined
:return: logger -- Logger instance
"""
_logger = logging.getLogger()
# By default, use the LOGGING_CFG logger configuration
config = LOGGING_CFG
# Check if a specific configuration is available
user_file = os.getenv(env_key, None)
if user_file and os.path.exists(user_file):
# A user file as been defined. Use it...
with open(user_file, 'rt') as f:
config = json.load(f)
# Load the configuration
logging.config.dictConfig(config)
return _logger
logger = glances_logger()