#!/usr/local/bin/python3.5###Destription: 實時讀取log信息###Author: Danny Deng###Datetime: 2016-11-17import re,time,subprocess,os,linecache#####定義log文件file_name = "/usr/local/nginx/logs/error.log"file_number = "/usr/local/zabbix_agent/number.txt"j = int(0)seek = int(0)##判斷過程：文件是否存在---判斷存儲日志大小的文件是否存在---判斷number size 與 filesize的大小###定義函數按行讀取文件內容def readline():####if判斷 seek是否大于0，大于則賦值，否則初始為0while True:######定義文件，根據seek值進行每行讀取，每次tell賦值給seekwith open(file_name,'r') as f:global seek#seek = seekf.seek(seek)data = f.readline()if data:seek = f.tell()yield dataelse:######Python變量轉換為shell變量global file_numberos.environ['seek'] = str(seek)os.environ['file_number'] = str(file_number)os.system('echo $seek > $file_number')os.system('chown zabbix.zabbix $file_number')returndef func_for():j = int(0)for i in readline():f_find = re.findall(r"check time out", i,flags=re.IGNORECASE)if "check time out" in f_find:j += 1#####沒有輸出0，有值輸出出現error匹配到的次數值try:print(j)except NameError:print(int("0"))###判斷日志文件是否存在if os.path.isfile(file_name):###判斷存儲文件內容大小的文件是否存在if os.path.isfile(file_number):####存在則讀取文件size大小，賦值給seek_numberseek_number = int(linecache.getline(file_number, 1))####然后繼續判斷存儲的文件大小與現在文件大小(確定文件是否是重新生成的)if os.path.getsize(file_name) >= seek_number and seek_number > 0:seek = seek_numberfunc_for()###若為新文件則，seek 賦值為0else:#open(arg1, "a+").write("0")#seek = int(linecache.getline(file_number, 1))seek = int(0)func_for()####file_number 不存在則新建，并賦值seek變量為0 else:#open(file_number, "a+").write("0")#seek = int(linecache.getline(file_number, 1))os.environ['file_number'] = str(file_number)os.system('echo 0 > $file_number')os.system('chown zabbix.zabbix $file_number')func_for()else:print("Error")quit()