07.django日志配置

https://docs.djangoproject.com/en/3.0/topics/logging/
https://yiyibooks.cn/xx/python_352/library/logging.html#logger-objects
https://docs.python.org/3/library/logging.html#logrecord-attributes
https://yiyibooks.cn/xx/python_352/library/logging.handlers.html

• logger 记录器，所有日志都要经过的入口
• handler 处理器，接收 logger 的日志，决定 log 是打印的目的，是文件、屏幕，还是其他地方，比如邮件 ELK
• filter 过滤器，过滤你想要的日志（不用）
• formatter 格式化，格式化 handler 的日志格式

一.logger 日志级别

二.logger 配置

• logger

    ‘loggers‘: {
        ‘log名称‘:{
            ‘handlers‘: [‘处理器名称1‘,,‘处理器名称2‘],
            ‘level‘: ‘日志级别‘,
            ‘propagate‘: False,
        },

• handlers

        ‘handlers名称‘: {
            ‘level‘: ‘日志级别‘,
            ‘class‘: ‘handlers类‘,
            ‘filename‘: ‘文件全路径‘,
            ‘when‘: "D",
            ‘interval‘: 1,
            ‘formatter‘: ‘formatter名称‘
        },

• formatter

        "formatter名称": {
            "format": ‘%(asctime)s %(name)s %(levelname)s %(pathname)s:%(lineno)d %(module)s:%(funcName)s %(message)s‘,
            "datefmt": "%Y-%m-%d %H:%M:%S"
        },

• format 日志消息格式

• 按时间轮转的参数

https://docs.python.org/3/library/logging.handlers.html#timedrotatingfilehandler

三.使用

• 3.1 定义一个 logger

    ‘loggers‘: {
        ‘mylogger‘:{
            ‘handlers‘: [‘console‘],
            ‘level‘: ‘DEBUG‘
        },

• 3.2 配置 handler

        ‘console‘: {
            ‘level‘: ‘DEBUG‘,
            ‘class‘: ‘logging.StreamHandler‘,# 写到屏幕
            ‘formatter‘: ‘simple‘
        },

• 3.3 某个 view 使用这个 logger

import logging
logger = logging.getLogger(‘mylogger‘)

• 3.4 视图内使用自定义输出级别和内容

logger.debug(‘视图的debuglog‘)

• 3.5 增加一个文件 handler

        ‘file‘: {
            ‘level‘ :‘DEBUG‘,
            ‘class‘: ‘logging.FileHandler‘,
            ‘filename‘: ‘/tmp/debug.log‘,
            ‘formatter‘: ‘simple‘,
        }

• 3.6 logger 中使用多个 handler, 关闭向上传播

        ‘mylogger‘:{
            ‘handlers‘: [‘console‘,‘file‘],
            ‘level‘: ‘DEBUG‘,
            ‘propagate‘: False,
        },

• 3.7 输出

DEBUG DEBUG 日志
ERROR ERROR 日志
DEBUG debug log
ERROR error log
System check identified no issues (0 silenced).
May 22, 2020 - 08:16:34
Django version 3.0.6, using settings ‘ops.settings‘
Starting development server at http://0.0.0.0:8000/
Quit the server with CONTROL-C.
DEBUG 视图的debuglog

/tmp/debug.log 也会有这个日志

四.定义一个日志输出格式，并使用

        "default": {
            "format": ‘%(asctime)s %(pathname)s:%(lineno)d %(module)s:%(funcName)s ‘
                      ‘%(levelname)s- %(message)s‘,
            "datefmt": "%Y-%m-%d %H:%M:%S"
        },

• 输出

2020-05-22 08:31:46 /home/jenvid/PycharmProjects/django/ops/apps/users/views.py:20 views:get DEBUG- 视图的debuglog

五. 定义django log，不同模块分开存放到不同文件，关闭向上传播，自定义的内容在最上级日志器记录中

LOGGING = {
    ‘version‘: 1,
    ‘disable_existing_loggers‘: False,
    ‘formatters‘: {
        ‘verbose‘: {
            ‘format‘: ‘{levelname} {asctime} {module} {process:d} {thread:d} {message}‘,
            ‘style‘: ‘{‘,
        },
        ‘simple‘: {
            ‘format‘: ‘{levelname} {message}‘,
            ‘style‘: ‘{‘,
        },
        "default": {
            "format": ‘%(asctime)s %(name)s  %(pathname)s:%(lineno)d %(module)s:%(funcName)s ‘
                      ‘%(levelname)s- %(message)s‘,
            "datefmt": "%Y-%m-%d %H:%M:%S"
        },
    },
    ‘handlers‘: {
        ‘console‘: {
            ‘level‘: ‘DEBUG‘,
            ‘class‘: ‘logging.StreamHandler‘,
            ‘formatter‘: ‘default‘
        },
        ‘file‘: {
            ‘level‘: ‘DEBUG‘,
            ‘class‘: ‘logging.handlers.TimedRotatingFileHandler‘,
            ‘filename‘: ‘/tmp/debug.log‘,
            ‘when‘: "D",
            ‘interval‘: 1,
            ‘formatter‘: ‘default‘
        },
        "request": {
            ‘level‘: ‘DEBUG‘,
            ‘class‘: ‘logging.FileHandler‘,
            ‘filename‘: ‘/tmp/request.log‘,
            ‘formatter‘: ‘default‘
        },
        "server": {
            ‘level‘: ‘DEBUG‘,
            ‘class‘: ‘logging.FileHandler‘,
            ‘filename‘: ‘/tmp/server.log‘,
            ‘formatter‘: ‘default‘
        },
        "root": {
            ‘level‘: ‘DEBUG‘,
            ‘class‘: ‘logging.FileHandler‘,
            ‘filename‘: ‘/tmp/root.log‘,
            ‘formatter‘: ‘default‘
        },

        "db_backends": {
            ‘level‘: ‘DEBUG‘,
            ‘class‘: ‘logging.FileHandler‘,
            ‘filename‘: ‘/tmp/db_backends.log‘,
            ‘formatter‘: ‘default‘
        },
        "autoreload": {
            ‘level‘: ‘INFO‘,
            ‘class‘: ‘logging.FileHandler‘,
            ‘filename‘: ‘/tmp/autoreload.log‘,
            ‘formatter‘: ‘default‘
        }
    },
    ‘loggers‘: {
        ‘mylogger‘:{
            ‘level‘: ‘DEBUG‘,
            ‘handlers‘: [‘console‘,‘file‘],
            ‘propagate‘: True,
        },
        "django": {
            "level": "DEBUG",
            "handlers": ["console", "file"],
            ‘propagate‘: False,
        },
        "django.request": {
            "level": "DEBUG",
            "handlers": ["request"],
            ‘propagate‘: False,
        },
        "django.server": {
            "level": "DEBUG",
            "handlers": ["server"],
            ‘propagate‘: False,
        },
        "django.db.backends": {
            "level": "DEBUG",
            "handlers": ["db_backends"],
            ‘propagate‘: False,
        },
        "django.utils.autoreload": {
            "level": "INFO",
            "handlers": ["autoreload"],
            ‘propagate‘: False,
        }
    },
    ‘root‘: {
        "level": "DEBUG",
        "handlers": ["root"],
    }
}

输出

-rw-r--r-- 1 jenvid docker    0 5月  22 15:47 request.log
-rw-r--r-- 1 jenvid docker  81K 5月  23 12:57 debug.log.2020-05-23_04-57
-rw-r--r-- 1 jenvid docker 1.9K 5月  23 13:21 autoreload.log
-rw-r--r-- 1 jenvid docker 9.4K 5月  23 13:21 db_backends.log
-rw-r--r-- 1 jenvid docker 9.1K 5月  23 13:21 server.log
-rw-r--r-- 1 jenvid docker 1.5K 5月  23 13:21 root.log
-rw-r--r-- 1 jenvid docker  632 5月  23 13:21 debug.log

cat root.log

2020-05-22 10:20:25 mylogger  /home/jenvid/PycharmProjects/django/ops/apps/idcs/views.py:13 views:<module> DEBUG- DEBUG 日志
2020-05-22 10:20:25 mylogger  /home/jenvid/PycharmProjects/django/ops/apps/idcs/views.py:14 views:<module> ERROR- ERROR 日志
2020-05-22 10:20:25 mylogger  /home/jenvid/PycharmProjects/django/ops/apps/users/views.py:13 views:<module> DEBUG- debug log
2020-05-22 10:20:25 mylogger  /home/jenvid/PycharmProjects/django/ops/apps/users/views.py:14 views:<module> ERROR- error log
2020-05-22 10:20:30 mylogger  /home/jenvid/PycharmProjects/django/ops/apps/users/views.py:20 views:get DEBUG- 视图的debuglog
2020-05-23 04:57:57 mylogger  /home/jenvid/PycharmProjects/django/ops/apps/users/views.py:20 views:get DEBUG- 视图的debuglog
2020-05-23 05:21:39 asyncio  /usr/lib/python3.7/asyncio/selector_events.py:53 selector_events:__init__ DEBUG- Using selector: EpollSelector
2020-05-23 05:21:40 mylogger  /home/jenvid/PycharmProjects/django/ops/apps/idcs/views.py:13 views:<module> DEBUG- DEBUG 日志
2020-05-23 05:21:40 mylogger  /home/jenvid/PycharmProjects/django/ops/apps/idcs/views.py:14 views:<module> ERROR- ERROR 日志
2020-05-23 05:21:40 mylogger  /home/jenvid/PycharmProjects/django/ops/apps/users/views.py:13 views:<module> DEBUG- debug log
2020-05-23 05:21:40 mylogger  /home/jenvid/PycharmProjects/django/ops/apps/users/views.py:14 views:<module> ERROR- error log
2020-05-23 05:21:44 mylogger  /home/jenvid/PycharmProjects/django/ops/apps/users/views.py:20 views:get DEBUG- 视图的debuglog

07.django日志配置

原文：https://www.cnblogs.com/jenvid/p/12942190.html