参考：
issu:https://github.com/benoitc/gunicorn/pull/2431
案例文档：https://github.com/benoitc/gunicorn/blob/master/gunicorn/glogging.py
python官方日志参考：https://docs.python.org/3.7/library/logging.html
旧版配置方式，不能控制日志大小
loglevel = "info" # debug, info, warning, error, critical.
pidfile = "logs/gunicore.pid" # 设置进程id pid文件的文件名
accesslog = "logs/gunicorn_http.log" # 设置访问日志
access_log_format = '%(h)s %(l)s %(u)s %(t)s "%(r)s" "%(q)s" %(s)s %(b)s "%(f)s" "%(a)s" %(D)s %(p)s'
errorlog = "logs/gunicorn_info.log" # 设置问题记录日志
新版配置方式，控制日志大小
logconfig_dict = {
'version':1,
'disable_existing_loggers': False,
'loggers':{
"gunicorn.error": {
"level": "DEBUG",# 打日志的等级可以换的，下面的同理
"handlers": ["error_file"], # 对应下面的键
"propagate": 1,
"qualname": "gunicorn.error"
},
"gunicorn.access": {
"level": "DEBUG",
"handlers": ["access_file"],
"propagate": 0,
"qualname": "gunicorn.access"
}
},
'handlers':{
"error_file": {
"class": "logging.handlers.RotatingFileHandler",
"maxBytes": 1024*1024*1024,# 打日志的大小，我这种写法是1个G
"backupCount": 1,# 备份多少份，经过测试，最少也要写1，不然控制不住大小
"formatter": "generic",# 对应下面的键
# 'mode': 'w+',
"filename": "/你要放日志的路径/gunicorn.error.log"# 打日志的路径
},
"access_file": {
"class": "logging.handlers.RotatingFileHandler",
"maxBytes": 1024*1024*1024,
"backupCount": 1,
"formatter": "generic",
"filename": "/你要放日志的路径/gunicorn.access.log",
}
},
'formatters':{
"generic": {
"format": "'[%(process)d] [%(asctime)s] %(levelname)s [%(filename)s:%(lineno)s] %(message)s'", # 打日志的格式
"datefmt": "[%Y-%m-%d %H:%M:%S %z]",# 时间显示方法
"class": "logging.Formatter"
},
"access": {
"format": "'[%(process)d] [%(asctime)s] %(levelname)s [%(filename)s:%(lineno)s] %(message)s'",
"class": "logging.Formatter"
}
}
}
配置后运行报错
gunicorn -c gunicorn_cfg.py main_api:app
Error: Unable to configure handler 'access_file'
gunicorn运行报错Error: Unable to configure root logger: Unable to add handler ‘console‘: ‘console‘
解决方案1，增加如下配置
"root": {
"level": "INFO", "handlers": ["error_file", "access_file"]},
logconfig_dict = {
"version": 1,
"disable_existing_loggers": False,
"root": {
"level": "INFO", "handlers": ["error_file", "access_file"]},
"loggers": {
"gunicorn.error": {
"level": "INFO", # 打日志的等级可以换的，下面的同理
"handlers": ["error_file"], # 对应下面的键
"propagate": 1,
"qualname": "gunicorn.error"
},
"gunicorn.access": {
"level": "INFO",
"handlers": ["access_file"],
"propagate": 0,
"qualname": "gunicorn.access"
}
},
"handlers": {
"error_file": {
"class": "logging.handlers.RotatingFileHandler",
"maxBytes": 1024 * 1024 * 50, # 打日志的大小，我这种写法是1个G
"backupCount": 1, # 备份多少份，经过测试，最少也要写1，不然控制不住大小
"formatter": "generic", # 对应下面的键
# "mode": "w+",
"filename": "./logs/error.log" # 打日志的路径
},
"access_file": {
"class": "logging.handlers.RotatingFileHandler",
"maxBytes": 1024 * 1024 * 50,
"backupCount": 1,
"formatter": "generic",
"filename": "./logs/access.log",
}
},
"formatters": {
"generic": {
"format": "'[%(process)d] [%(asctime)s] %(levelname)s [%(filename)s:%(lineno)s] %(message)s'", # 打日志的格式
"datefmt": "[%Y-%m-%d %H:%M:%S %z]", # 时间显示方法
"class": "logging.Formatter"
},
"access": {
"format": "'[%(process)d] [%(asctime)s] %(levelname)s [%(filename)s:%(lineno)s] %(message)s'",
"class": "logging.Formatter"
}
}
}
解决方案2 以上配置报错后，按官方参考配置
案例文档：https://github.com/benoitc/gunicorn/blob/master/gunicorn/glogging.py
CONFIG_DEFAULTS = dict(
version=1,
disable_existing_loggers=False,
root={
"level": "INFO", "handlers": ["console"]},
loggers={
"gunicorn.error": {
"level": "INFO",
"handlers": ["error_console"],
"propagate": True,
"qualname": "gunicorn.error"
},
"gunicorn.access": {
"level": "INFO",
"handlers": ["console"],
"propagate": True,
"qualname": "gunicorn.access"
}
},
handlers={
"console": {
"class": "logging.StreamHandler",
"formatter": "generic",
"stream": "ext://sys.stdout"
},
"error_console": {
"class": "logging.StreamHandler",
"formatter": "generic",
"stream": "ext://sys.stderr"
},
},
formatters={
"generic": {
"format": "%(asctime)s [%(process)d] [%(levelname)s] %(message)s",
"datefmt": "[%Y-%m-%d %H:%M:%S %z]",
"class": "logging.Formatter"
}
}
)
备注
：logger可以看做是一个记录日志的人，对于记录的每个日志，他需要有一套规则，比如记录的格式（formatter），等级（level）等等，这个规则就是handler。使用logger.addHandler(handler)添加多个规则，就可以让一个logger记录多个日志。
创建logger
创建handler
定义formatter
给handler添加formatter
给logger添加handler
写成代码差不多就是酱婶的（这个是照别的网页抄的，参考附注）：
1 import logging
2
3 # 1、创建一个logger
4 logger = logging.getLogger('mylogger')
5 logger.setLevel(logging.DEBUG)
6
7 # 2、创建一个handler，用于写入日志文件
8 fh = logging.FileHandler('test.log')
9 fh.setLevel(logging.DEBUG)
10
11 # 再创建一个handler，用于输出到控制台
12 ch = logging.StreamHandler()
13 ch.setLevel(logging.DEBUG)
14
15 # 3、定义handler的输出格式（formatter）
16 formatter = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')
17
18 # 4、给handler添加formatter
19 fh.setFormatter(formatter)
20 ch.setFormatter(formatter)
21
22 # 5、给logger添加handler
23 logger.addHandler(fh)
24 logger.addHandler(ch)