python实时分析日志脚本 python实时分析日志的一个小脚本分享
不懂真人 人气:0想了解python实时分析日志的一个小脚本讲解的相关内容吗,不懂真人在本文为您仔细讲解python实时分析日志脚本的相关知识和一些Code实例,欢迎阅读和指正,我们先划重点:python日志实时分析,python,日志分析脚本,python,实时监控日志,下面大家一起来学习吧。
前言
大家都知道Web运维总要关注相关域名的实时2xx/s、4xx/s、5xx/s、响应时间、带宽等这些指标,之前的日志是五分钟一分割,简单的用awk就可以了,现在由于要推送日志到ELK,继续之前五分钟一分割会有问题,就改为一天分割一次。改成一天一分割后,显然再继续用Shell就不合适了,于是就用Python写了下。
方法如下:
脚本主要运用了文件的seek和tell函数,原理如下:
1.加入crontab,每5分钟执行一次
2.只分析从上次读取日志文件的结束位置到这次读取文件时的末尾位置之间的日志,出结果
可以使用zabbix_sender把结果发送到zabbix server或者直接使用zabbix agent来读取这个文件取数据,配合zabbix出图、做报警,代码如下:
#!/usr/bin/env python #coding: utf-8 from __future__ import division import os LOG_FILE = '/data0/logs/nginx/xxxx-access_log' POSITION_FILE = '/tmp/position.log' STATUS_FILE = '/tmp/http_status' #crontab 执行时间 CRON_TIME = 300 def get_position(): #第一次读取日志文件,POSITION_FILE为空 if not os.path.exists(POSITION_FILE): start_position = str(0) end_position = str(os.path.getsize(LOG_FILE)) fh = open(POSITION_FILE,'w') fh.write('start_position: %s\n' % start_position) fh.write('end_position: %s\n' % end_position) fh.close() os._exit(1) else: fh = open(POSITION_FILE) se = fh.readlines() fh.close() #其他意外情况导致POSITION_FILE内容不是两行 if len(se) != 2: os.remove(POSITION_FILE) os._exit(1) last_start_position,last_end_position = [item.split(':')[1].strip() for item in se] start_position = last_end_position end_position = str(os.path.getsize(LOG_FILE)) #日志轮转导致start_position > end_position #print start_position,end_position if start_position > end_position: start_position = 0 #日志停止滚动时 elif start_position == end_position: os._exit(1) #print start_position,end_position fh = open(POSITION_FILE,'w') fh.write('start_position: %s\n' % start_position) fh.write('end_position: %s\n' % end_position) fh.close() return map(int,[start_position,end_position]) def write_status(content): fh = open(STATUS_FILE,'w') fh.write(content) fh.close() def handle_log(start_position,end_position): log = open(LOG_FILE) log.seek(start_position,0) status_2xx,status_403,status_404,status_500,status_502,status_503,status_504,status_all,rt,bandwidth = 0,0,0,0,0,0,0,0,0,0 while True: current_position = log.tell() if current_position >= end_position: break line = log.readline() line = line.split(' ') host,request_time,time_local,status,bytes_sent = line[1],line[3],line[5],line[10],line[11] #print host,request_time,time_local,status,bytes_sent status_all += 1 try: rt += float(request_time.strip('s')) bandwidth += int(bytes_sent) except: pass if status == '200' or status == '206': status_2xx += 1 elif status == '403': status_403 += 1 elif status == '404': status_404 += 1 elif status == '500': status_500 += 1 elif status == '502': status_502 += 1 elif status == '503': status_503 += 1 elif status == '504': status_504 += 1 log.close() #print "status_2xx: %s\nstatus_403: %s\nstatus_404: %s\nstatus_500: %s\nstatus_502: %s\nstatus_503: %s\nstatus_504: %s\nstatus_all: %s\nrt: %s\nbandwidth: %s\n" % (status_2xx/CRON_TIME,status_403/CRON_TIME,status_404/CRON_TIME,status_500/CRON_TIME,status_502/CRON_TIME,status_503/CRON_TIME,status_504/CRON_TIME,status_all/CRON_TIME,rt/status_all,bandwidth/CRON_TIME) write_status("status_2xx: %s\nstatus_403: %s\nstatus_404: %s\nstatus_500: %s\nstatus_502: %s\nstatus_503: %s\nstatus_504: %s\nstatus_all: %s\nrt: %s\nbandwidth: %s\n" % (status_2xx/CRON_TIME,status_403/CRON_TIME,status_404/CRON_TIME,status_500/CRON_TIME,status_502/CRON_TIME,status_503/CRON_TIME,status_504/CRON_TIME,status_all/CRON_TIME,rt/status_all,bandwidth/CRON_TIME)) if __name__ == '__main__': start_position,end_position = get_position() handle_log(start_position,end_position)
看下分析的结果:
cat /tmp/http_status status_2xx: 17.3333333333 status_403: 0.0 status_404: 1.0 status_500: 0.0 status_502: 0.0 status_503: 0.0 status_504: 0.0 status_all: 20.0 rt: 0.0782833333333 bandwidth: 204032.0
后来发现有点问题,start_position、end_position 使用字符串比较会有问题,如下:
In [5]: '99772400' > '100227572' Out[5]: True In [6]: int('99772400') > int('100227572') Out[6]: False
因此,更正为:
#日志轮转导致start_position > end_position #print start_position,end_position if int(start_position) > int(end_position): start_position = 0 #日志停止滚动时 elif int(start_position) == int(end_position): os._exit(1)
总结
以上就是这篇文章的全部内容了,希望本文的内容对大家的学习或者工作能带来一定的帮助,如果有疑问大家可以留言交流,谢谢大家对的支持。
加载全部内容