基于Python的关键字监控及告警

为了解决日志文件监控的问题， 使用python脚本完成了基于关键字的告警功能

环境 python 2.7

依赖包 time \ traceback \ filelock \ logging

代码如下：

#!/bin/python
#coding:utf-8
import sys
reload(sys)
sys.setdefaultencoding('utf8')
import re
import os
from urllib import urlencode
import logging
import filelock
import time
import traceback

#config.conf
#文件1:关键字A|关键字B:出现次数:告警方式:联系方式:联系组:某某异常
#文件2:关键字C|关键字D:出现次数:告警方式:联系方式:联系组:某某异常

#rc.local增加
#sudo -u monitor /bin/bash -x /home/apps/logmon-job/deploy_py.sh

logging.basicConfig(level=logging.DEBUG,
          format='%(asctime)s %(filename)s[line:%(lineno)d] %(levelname)s %(message)s',
          datefmt='%a, %d %b %Y %H:%M:%S',
          filename='/home/logs/monitor/logmon.log',
          #filename='/Users/mac/Desktop/logmon/logmon.log',
          filemode='a')

basDir='/home/apps/logmon-job/'

posFiles=basDir+'/pos.log'
configFile=basDir+'config.conf'

def readOnly(filename):
  return open(filename,'r')
  # pass

def readWrite(filename):
  return open(filename,'rw')
  # pass
def writeOnly(filename):
  return open(filename,'w')
  # pass

# def closesfile():
#   pass

def getStartPosLog(posFiles):
  txt=readOnly(posFiles)
  result={}
  for i in txt :
    filename,pos=i.split(':')
    if filename != '' :
      result[filename]=pos
  return result
  txt.close()

def rematch(txt,regular):
  resultList=[]
  for t in txt.split(r'\n') :
    # print t
    # pattern = re.compile(r':')
    pattern = re.compile(regular)

    resultList=(pattern.findall(t))
  try :
    # print '匹配结果为',resultList 
    return len(resultList),regular , resultList[0]
  except Exception as e :
    print e 
    return 0 , regular , ''
  # pass

def getEndPost(f):
  filename=readOnly(f)
  try :
    nowpos=filename.tell()
    filename.seek(0,2)
    endpos=filename.tell()
    filename.seek(nowpos,0)
  except :
    endpos = 0
  filename.close()
  return endpos 
  # pass

def getDistinct(startpos,endpos):
  return endpos-startpos

def getText(f,startpos,endpos):

  filename=readOnly(f)
  filename.seek(startpos,0)
  textLength=getDistinct(startpos,endpos)
  text=filename.read(textLength)
  filename.close()
  return text

def updatePosLog(posResult,posFiles):
  f=writeOnly(posFiles)
  # print 'posResult ',posResult
  for k in posResult.keys() :
    v=posResult[k]
    f.writelines('%s:%s\n' %(k,v))
  f.close()

  pass

def getAlterConfi(filename):
  #文件:关键字:出现次数:告警方式:联系方式:联系组
  f=readOnly(filename)
  result={}
  for lines in f.readlines():
    # print lines
    try :
      filename , key , count , alterType , alterAddress , alterGroup ,alterMessage= lines.strip('\n').split(":")
      result[filename]={}
      result[filename]["key"]     =key
      result[filename]["count"]    =count
      result[filename]["alterType"]  =alterType
      result[filename]["alterAddress"]=alterAddress
      result[filename]["alterGroup"] =alterGroup
      result[filename]["alterMessage"]=alterMessage
    except Exception as e:
      print e
      print '错误的配置 %s' % (lines.strip('\n'))
      pass
  return result

def sendSms(account,message):

  data={
    'accounts':account ,
    'templateName':'opalert' ,
    'alertcontent':message ,
  }
  encodeMessage=urlencode(data)

  #正式时需要开启
  os.system('curl -I "http://10.1.1.146:8080/sms/send?%s" ' % ( encodeMessage ) )

def main():
  global posFiles
  global configFile

  AlterConfi=getAlterConfi(configFile)
  print AlterConfi
  posResult=getStartPosLog(posFiles)
  posResult_bak=getStartPosLog(posFiles)
  # print posResult
  for filename in AlterConfi.keys() :
    keyDict=AlterConfi[filename]
    print '开始检查文件 ',filename
    #print rematch(filename,r'#')[0] 
    if not os.path.exists(filename):
      print 'file "%s" not exist ,pass' % (filename)
      # continue
    if os.path.exists(filename):

      
      endpos = getEndPost(filename)

      if endpos == 0 :
        print 'file "%s" is empty ,pass' % (filename)
      else :
        try :
          startpos= int(posResult[filename])
        except :
          startpos = 0
        print 'startpos is %.f , endpos is %.f' %(startpos ,endpos)

        #处理切割后，偏移量归位
        if startpos > endpos :
          startpos = 0

        text = getText(filename,startpos,endpos)
        # print '%s text is : '%(filename) , text

        #分析关键字
        #print AposlterConfi[filename]
        matchCount , regular , resultList = rematch(text,keyDict['key'])
        print '匹配关键字',regular , '匹配长度为', matchCount , '关键字告警阈值' ,keyDict['count'] , '关键字' , resultList

        if int(matchCount) >= int(keyDict['count']) :
          print 'alterGroup len is ',len(keyDict['alterGroup'])
          print 'alterType len is ' ,len(keyDict['alterType'])
          if len(keyDict['alterGroup']) > 0:
            pass
          if len(keyDict['alterType']) >0:
            if keyDict['alterType'].upper() == 'SMS' :
              for account in keyDict['alterAddress'].split(',') :
                if len(account) >0 :
                  sendSms(account,'发现%s 告警，关键字:%s ,出现次数:%s ' %(keyDict['alterMessage'] , resultList , matchCount ))
            pass
        #记录末尾偏移量
        posResult_bak[filename]=endpos


    
  print '打印文件偏移量信息',posResult_bak
    
  #正式时需要开启
  updatePosLog(posResult_bak,posFiles)


if __name__ == '__main__':
  lock = filelock.FileLock("/home/apps/logmon-job/logmon.py.lock")
  if lock:
    logging.info("CaiWeiCheng Get Lock.start!!!")
  try:
    with lock.acquire(timeout=5):
      while 1 :
        main()
        time.sleep(60)
      # pass
  #except filelock.timeout :
  except Exception as e :
    print traceback.format_exc()
    print "timeout"     
    logging.warning("get file lock timeout")

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