Python 多进程日志轮转：ConcurrentLogHandler 实战与常见坑点解析

pip install ConcurrentLogHandler

#!/usr/bin/env python
# -*- coding: utf-8 -*- 
import os
import logging
from cloghandler import ConcurrentRotatingFileHandler
from config import LOG_PATH, LOG_FILENAME, LOG_MAX_BYTES
 
 
def create_logger(log_path=os.getcwd(), # 存放日志的目录
         level=logging.DEBUG,
         formatter=logging.BASIC_FORMAT, # 日志输出格式
         logger_name="", # 可以使用logging.getlogger(logger_name)使用此logger
         mode='a', 
         delay=0,
         debug=True,
         log_filename=LOG_FILENAME, # 保存日志的文件名（备份出的文件会以此名+.1、 .2命名）
         encoding=None,
         maxBytes=LOG_MAX_BYTES, # 每个日志文件的最大容量
         backupCount=3 # 最多备份几个日志文件):
  # 判断存放日志的文件夹是否存在 如果不存在新建
  if not os.path.exists(log_path):
    os.mkdir(log_path)
  # 存放log的文件名
  log_filename = os.path.join(log_path, log_filename)
 
  # 创建一个logger
  logger = logging.getLogger(logger_name)
  # 设置日志等级
  logger.setLevel(level)
  # 创建一个滚动日志处理器
  crfh = ConcurrentRotatingFileHandler(log_filename, mode=mode, maxBytes=maxBytes, backupCount=backupCount, delay=delay, debug=debug, encoding=encoding)
  # 定义handler的输出格式
  # 设定日志输出格式
  crfh.setFormatter(formatter)
  # 添加日志处理器
  logger.addHandler(crfh)
  # 返回logger对象
  return logger
 
# 日志格式
formatter_log = logging.Formatter('%(asctime)s - %(filename)s [line: %(lineno)d] 【%(levelname)s】 ----- %(message)s')
# 生成一个logger
logger = create_logger(log_path=LOG_PATH, logger_name="mylogger", formatter=formatter_log) 
 

logger.error("error msg") 

from config import CHANNEL_PATH, CHANNEL_FILENAME, LOG_MAX_BYTES
# 只需要把日志的格式改为只存入信息就可以了
formatter_writer = logging.Formatter('%(message)s')
# 创建一个写入器（logger）
writer = create_logger(logger_name="writer",log_path=CHANNEL_PATH, log_filename=CHANNEL_FILENAME, formatter=formatter_writer, level=logging.INFO)

[loggers]
keys = root,public
 
[handlers]
keys = consoleHandler,publicFileHandler
 
[formatters]
keys = my_formatter
 
[logger_root]
level = DEBUG
handlers = consoleHandler
 
[logger_public]
handlers = publicFileHandler
qualname = public
propagate = 0
 
[handler_consoleHandler]
class = StreamHandler
level = DEBUG
formatter = my_formatter
args = (sys.stdout,)
 
[handler_publicFileHandler]
class = cloghandler.ConcurrentRotatingFileHandler
level = INFO
formatter = my_formatter
kwargs = {"filename": "./logs/public.log", "maxBytes": 1024 * 1024 * 10, "backupCount": 10, "delay": True, "debug": True}
 
[formatter_my_formatter]
format = %(asctime)s - %(filename)s [line: %(lineno)d] [%(levelname)s] ----- %(message)s
datefmt = %Y-%m-%d %H:%M:%S
 

import logging
import logging.config 
logging.config.fileConfig("./xxx.ini") 
logger = logging.getLogger("public") 
logger.info("hello world!")