====== 服务器状态监控脚本 ======
  作者：屈伟 (http://quwei.techweb.com.cn) 转载请注明来源

===== 通用：发送邮件=====
使用mail.139.com免费邮箱，发邮件到139邮箱是能免费把邮件内容发到手机上，从而时间实时手机报警
<code python>
#!/usr/bin/env python
import os
##author:Qu Wei(http://quwei.techweb.com.cn)
gtalk = "kenvinqu@gmail.com"
mobile = "Moble No"

import smtplib
from email.mime.text import MIMEText

to_addr = 'qu-wei@139.com'
mailserver = 'smtp.139.com'
username = mobile+'@139.com'
password = 'xxxx'
from_addr = mobile+'@139.com'


def sendmail(subject, body) :
    msg = MIMEText(body)
    msg['Subject'] = subject
    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()
</code>

===== 检查磁盘 =====
<code python>
#!/usr/bin/env python
import os
import re
import urllib 
df = os.popen("df -kh").readlines()
#print df
i = 0
for line in df:
    item = re.split("\s+", line)
    i = i +1
    if i < 2 or i > 4: continue;
    if len(item) < 5 : continue;
    ##print "item:", item
    p =  int( item[4].replace("%","") )
    if p > 90 :
        msg = "Disk is full ! "+ line
        sendmail('disk', msg)
</code>

===== ping服务器 =====
<code python>
import re
import os

plists = ['x.x.x.x', 'x.x.x.x']]

def ping(ip) :
    cmd = "ping -c 5 %s" % ip
    print cmd
    c = os.popen(cmd).read()
    m = re.search("(\d+) packets transmitted, (\d+) received", c)
    i = int( m.group(2) )
    print i
    if i < 2 :
        ##ping第二次，防止误判
        cmd = "ping -c 5 %s" % ip
        print cmd
        c = os.popen(cmd).read()
        m = re.search("(\d+) packets transmitted, (\d+) received", c)
        i = int( m.group(2) )
        if i < 2 :
            msg = "IP:%s ping error, received:%s" % (ip, i)
            sendmail('ping', msg)

for ip in plists :
    ping(ip)
</code>

===== 检查从库运行状态 =====
<code python>
import re
import os
##author:Qu Wei(http://quwei.techweb.com.cn)
MYSQL_SH = "/usr/local/mysql/bin/mysql "

def check_slave(name, sh) :
    msg = ""
    str = os.popen(MYSQL_SH + sh + " -e 'show slave status\G'").read()
    ##print "str::", str
    if not str:
        msg = name + ": mysql error, cannot connect ";
        sendmail('mysql', msg)
        return
    p = re.compile("Slave_IO_Running:\s+(\w+)", re.M)
    m = p.search(str)
    if m:
        if "Yes" != m.group(1):
            msg = ": Slave_IO_Running:" + m.group(1)
    if msg :
        msg = name + ": mysql slave error, " + msg
        sendmail('mysql', msg)
    else:
        print "MySql: ", name, " OK!";

check_slave("66 3306 slave",  "-uuser -ppwd -P3306 -h211.100.42.x");
</code>