mysql数据库主从运行。为了知道从机的同步情况，写了个脚本，放在crontab中，如果同步出错，则邮件报警。去年写的，放上来做个备忘。

#!/usr/local/bin/python
# -------------------------------------------------------------------------------
# Filename:    .py
# Revision:    1.0
# Date:        2012-03-20
# Author:      simonzhang
# Web:         www.simonzhang.net
# Email:       simon-zzm@163.com
# -------------------------------------------------------------------------------
import os
import pexpect
import time
import smtplib
from email.mime.text import MIMEText

#### base se
mysql_bin = '/mysql5/bin/mysql'
mysql_user = ''
mysql_pass = ''
mail_host = 'smtp.exmail.qq.com'
mail_user = 'XXX@XXX.net'
mail_pwd = 'XXXX'
mail_to = "xxxxx@xxx.com"
####

def mail_warn(error_ip):
    content = 'IP %s mysql slave is error!'%error_ip
    msg = MIMEText(content)
    msg['From'] = mail_user
    msg['Subject'] = 'mysql warnning %s'%error_ip
    msg['To'] = mail_to
    try:
        s = smtplib.SMTP()
        s.connect(mail_host)
        s.login(mail_user,mail_pwd)
        s.sendmail(mail_user,[mail_to],msg.as_string())
        s.close()
    except Exception ,e:
        print e

def main():
    status = os.popen("%s -u%s -p%s -e 'show slave status\G'"%
                      (mysql_bin,mysql_user,mysql_pass)).read() 
    io_status = status[status.find('Slave_IO_Running: ')+18]
    sql_status = status[status.find('Slave_SQL_Running: ')+19]
    if (io_status == 'Y') or (sql_status == 'Y'):
        ip = os.popen("/sbin/ifconfig|grep 'inet addr'|awk '{print $2}'").read()
        get_local_ip = ip[ip.find(':')+1:ip.find('n')]
        mail_warn("%s"%get_local_ip)

if __name__ == "__main__":
    main()