该脚本作用用于查询日志过去一分钟内的并发量，并发单位位1分钟，结果打印在标准输出中，可以配合一些软件实现日志的并发实时监控，比如zabbix。
#! /usr/local/bin/python3
import sys
import re
import datetime
import os
def generate_previous_minutes():
format=’%d/%b/%y:%h:%m’
return (datetime.datetime.today()-datetime.timedelta(minutes=1)).strftime(format)
def check_logs(log_path,examine_minutes):
regex_minutes=re.compile(examine_minutes)
minutes_count=0
step=10*1024*1024
with open(log_path,encoding=’latin-1′) as file:
line=file.readline()
while line:
time_line=line.split(‘ ‘)[3][1:]
if time_line>=examine_minutes:
file.seek(file.tell()-step)
file.readline()
break
file.seek(file.tell()+step)
if file.tell()>=os.path.getsize(log_path):
file.seek(file.tell()-step)
file.readline()
break
file.readline()
line=file.readline().strip()
for line in file:
line=line.strip()
words=line.split(‘ ‘)
if(regex_minutes.search(words[3])):
minutes_count+=1
print(minutes_count)
def main(log_path):
previous_minutes=generate_previous_minutes()
print(previous_minutes)
check_logs(log_path,previous_minutes)
if __name__ == ‘__main__’:
log_path=sys.argv[1]
main(log_path)