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Logging to rotating files

Author:
davidfung
Posted:
August 14, 2013
Language:
Python
Version:
1.5
Score:
0 (after 0 ratings)

It took me some time to figure out how to set up logging in Django. What I want to do is to log to a pair of rotating files each 1MB in size.

What I come up with is this code segment in the settings.py file.

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# In settings.py

U_LOGFILE_NAME = r'/path/to/log.txt'
U_LOGFILE_SIZE = 1 * 1024 * 1024
U_LOGFILE_COUNT = 2
U_LOGFILE_APP1 = 'app1'
U_LOGFILE_APP2 = 'app2'

LOGGING = {
    'version': 1,
    'disable_existing_loggers': False,
    'formatters': {
        'standard': {
            'format' : "[%(asctime)s] %(levelname)s [%(name)s:%(lineno)s] %(message)s",
            #'datefmt' : "%d/%b/%Y %H:%M:%S"
        },
    },
    'filters': {
        'require_debug_false': {
            '()': 'django.utils.log.RequireDebugFalse'
        }
    },
    'handlers': {
        'mail_admins': {
            'level': 'ERROR',
            'filters': ['require_debug_false'],
            'class': 'django.utils.log.AdminEmailHandler'
        },
        'logfile': {
            'level':'DEBUG',
            'class':'logging.handlers.RotatingFileHandler',
            'filename': U_LOGFILE_NAME,
            'maxBytes': U_LOGFILE_SIZE,
            'backupCount': U_LOGFILE_COUNT,
            'formatter': 'standard',
        },
    },
    'loggers': {
        'django.request': {
            'handlers': ['mail_admins'],
            'level': 'ERROR',
            'propagate': True,
        },
        U_LOGFILE_APP1: {
            'handlers': ['logfile'],
            'level': 'DEBUG',
            'propagate': True,
        },
        U_LOGFILE_APP2: {
            'handlers': ['logfile'],
            'level': 'DEBUG',
            'propagate': True,
        },
    }
}

# Usage:

import os
log = logging.getLogger(__name__)
log.debug("debug")
log.info("info")
log.warn("warn")
log.error("error")

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