详解grep获取MySQL错误日志信息的方法

#!/usr/bin/env python2.7#-*- encoding: utf-8 -*- """该模块用于提取每天mysql日志中的异常或错误信息author: xiaomoemail: moxiaomomo@gmail.com""" import osimport sysimport stringfrom datetime import * # 預設字符解碼器為utf-8reload(sys)sys.setdefaultencoding('utf-8')  COMMON_FLAGS = ["error", "exception", "fail", "crash", "repair"] def _contain_flag(cur_str):  for flag in COMMON_FLAGS:    if flag in string.lower(cur_str):      return True  return False """获取当前mysql实例的error_log文件路径"""def _get_mysql_error_log_path():  log_path = ''  grep_infos = os.popen('ps aux | grep mysql | grep "log-error"').read()  if len(grep_infos) > 1:    grep_infos = grep_infos.split("log-error=")  if len(grep_infos) > 1:    grep_infos = grep_infos[1].split(' ')  if len(grep_infos) > 1:    log_path = grep_infos[0]  return log_path """读取mysql错误日志中包含异常或错误信息的行"""def _get_error_info(error_log, begin_date):  error_infos = []  f = open(error_log, 'r')  lines = f.readlines()  for line in lines:    data_array = line.split(' ')    if len(data_array) > 0 and len(data_array[0]) == 10:      dt_strs = data_array[0].split('-')      cur_date = date(int(dt_strs[0]), int(dt_strs[1]), int(dt_strs[2]))      if cur_date >= begin_date and _contain_flag(line):        error_infos.append(line)  f.close()  return error_infos """组装并返回mysql错误日志信息"""def get_mysql_errors(begin_date=date.today()-timedelta(1)):  try:    err_log_path = _get_mysql_error_log_path()    if len(err_log_path) > 1:      return _get_error_info(err_log_path, begin_date)  except Exception,e:    print "[get_mysql_errors]%s"%e    return []