需要使用Python进行每日日志轮换(0utc) [英] Need to do a daily log rotation (0utc) using Python

问题描述

我是Python的入门者.我编写了一个小的记录器，该记录器从串行端口获取数据并将其写入日志文件.我有一个小程序，可以打开文件进行追加，写入然后关闭.我怀疑这可能不是最好的方法，但这是我到目前为止所发现的.

I'm an admitted noob to Python. I've written a little logger that takes data from the serial port and writes it to a log file. I've got a small procedure that opens the file for append, writes, then closes. I suspect this might not be the best way to do it, but it's what I've figured out so far.

我希望能够自动在00 UTC处执行日志旋转，但是到目前为止，我使用RotatingFileHandler进行此操作的尝试均以失败告终.

I'd like to be able to have it automagically perform a log-rotate at 00 UTC, but so far, my attempts to do this with RotatingFileHandler have failed.

代码如下:

import time, serial, logging, logging.handlers,os,sys
from datetime import *

CT12 = serial.Serial()
CT12.port = "/dev/ct12k"
CT12.baudrate = 2400
CT12.parity = 'E'
CT12.bytesize = 7
CT12.stopbits = 1
CT12.timeout = 3

logStart = datetime.now()
dtg = datetime.strftime(logStart, '%Y-%m-%d %H:%M:%S ')
ctlA = unichr(1)
bom = unichr(2)
eom = unichr(3)
bel = unichr(7)
CT12Name = [ctlA, 'CT12-NWC-test']
CT12Header = ['-Ceilometer Logfile \r\n', '-File created: ', dtg, '\r\n']

def write_ceilo ( text ) :
    f = open ('/data/CT12.log', 'a')
    f.write (text)
    f.close ()

write_ceilo(''.join(CT12Header))

CT12.open()

discard = CT12.readlines()
#print (discard)

while CT12.isOpen():
    response = CT12.readline()
    if len(response) >= 3:
        if response[0] == '\x02' :
            now=datetime.now()
            dtg=datetime.strftime(now, '-%Y-%m-%d %H:%M:%S\r\n')
            write_ceilo(dtg)
            write_ceilo(''.join(CT12Name))
            write_ceilo(response)

我该怎么做才能使其自动旋转，并附上旋转日期或序列号以进行识别.我不希望将其中的任何一个都淘汰掉，只是保留数据的每日日志文件. (或者可能是一个小时的文件?)

What can I do to make this rotate automatically, affixing either a date of rotation, or a serial number, for identification. I'm not looking to rotate any of these out, just keep a daily log file of the data. (or maybe an hourly file?)

推荐答案

对于通过Google到达的任何人，请不要在使用记录器时将其从记录器下面移出，方法是调用move命令或系统副本.等

For anyone arriving via Google, please don't move the log file out from under the logger while it is in use by calling the system copy of move commands or etc.

您正在寻找的是 TimedRotatingFileHandler :

import time

import logging
from logging.handlers import TimedRotatingFileHandler

# format the log entries
formatter = logging.Formatter('%(asctime)s %(name)s %(levelname)s %(message)s')

handler = TimedRotatingFileHandler('/path/to/logfile.log', 
                                   when='midnight',
                                   backupCount=10)
handler.setFormatter(formatter)
logger = logging.getLogger(__name__)
logger.addHandler(handler)
logger.setLevel(logging.DEBUG)

# generate example messages
for i in range(10000):
    time.sleep(1)
    logger.debug('debug message')
    logger.info('informational message')
    logger.warn('warning')
    logger.error('error message')
    logger.critical('critical failure')

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