用python腳本監控并發量

該腳本作用用于查詢日志過去一分鐘內的并發量，并發單位位1分鐘，結果打印在標準輸出中，可以配合一些軟件實現日志的并發實時監控，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=1010241024
    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)

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