用python监控java服务脚本(1)

java服务有的时候报了OutOfMemory错误后，进程还在哪里。为了即时发现这样的错误,写了这个脚本，用这个脚本定时扫描java服务日志文件的最后500行，如果有OutOfMemory错误，就给指定邮箱发送邮件。邮件内容包括：发生错误的主机和报错的文件。

#!/usr/bin/python
import string
import smtplib
from email.mime.text import MIMEText
import socket
import fcntl
import struct

logFiles = ['file.txt']
pat = 'OutOfMemory'
mailserver = 'smtp.163.com'
username = 'xxxx@163.com'
password = 'yy'
from_addr = 'xxxx@163.com'
to_addr = 'zzzz@sohu.com'

def get_ip_address(ifname):
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
return socket.inet_ntoa(fcntl.ioctl(s.fileno(),0x8915,struct.pack('256s', ifname[:15]))[20:24])

host = get_ip_address('eth0')

def fileScan(file,pattern):
logFile = open(file,'r')
logStrs = logFile.readlines()
logLines = len(logStrs)
logStr = str(logStrs[-10:logLines])
try:
logStat = logStr.index(pattern)
if logStat:
return 1
except ValueError:
return 0

logFile.close()

for f in logFiles:
stat = fileScan(f,pat)
if stat:
msg = MIMEText('Host ip: ' + host + "\r\n" + 'OutOfMemory File: ' + f)
msg['Subject'] = 'Java Service OutOfMemory'
svr = smtplib.SMTP(mailserver)
#svr.set_debuglevel(1)   #print debug
svr.login(username,password)
svr.sendmail(from_addr,to_addr,msg.as_string())
svr.close()