监控数据库是否可写，如果你的监控脚本逻辑是，写入数据库成功后显示成功，反之显示不成功然后报警。那么难题来了，数据库真的无法写入了，你的监控脚本的写入命令也会被mysql hang住，一直卡在那里，直到天荒地老，根本无法实现报警。那换个思路，如果设置个超时时间，是不是更好。
#!/usr/bin/env python
# -*-coding:utf8-*-
import MySQLdb
import re
import smtplib
import json
from email.mime.text
import MIMEText
import sys
import time
import multiprocessing
reload(sys)
sys.setdefaultencoding('utf8')
def mysql_select(sql, pipe):
try:
conn = MySQLdb.connect(host='xxx.xxx.xxx.xxx',user='xxxx',passwd='xxxx',db='xxxx',port=xxxx,charset='utf8',connect_timeout=10)
cursor = conn.cursor()
cursor.execute(sql)
result = cursor.fetchall()
cursor.close()
conn.commit()
conn.close()
pipe.send('successful')
except Exception,e:
pipe.send("zabbix 数据库异常: %s" % e)
def query_with_timeout(sql):
pipe_out, pipe_in = multiprocessing.Pipe(False)
subproc = multiprocessing.Process(target=mysql_select,args=(sql, pipe_in))
subproc.start()
subproc.join(timeout=3)
if pipe_out.poll():
ex_c = pipe_out.recv()
else:
ex_c = "zabbix 数据库无法写入"
subproc.terminate()
#raise Exception("Query %r ran for >%r" % (sql, 5))
raise Exception(ex_c)
###
def se_mail(mail_result):
now_time = time.strftime('%Y-%m-%d %H:%M:%S',time.localtime(time.time()))
sys.setdefaultencoding('utf-8')
SUBJECT = "数据库监控"
TO = "xxxx@ptthink.com"
FROM = "ooooo@ptmind.com"
msg = MIMEText("""
<html>
<head>
</head>
<body>
<table width="800" border="1" cellspacing="0" cellpadding="4">
<tr>
<th bgcolor="#00FFFF" height="1" colspan="4" align="center" >中国区zabbix数据库监控</th>
</tr>
<td width="100px" nowrap>告警区域</td>
<td >中国</td>
<tr>
</tr>
<td width="100px" nowrap>主机名称</td>
<td >xxx.xxx.xxx.xxx</td>
<tr>
</tr>
<td width="100px" nowrap>告警项目</td>
<td >zabbix数据库监控</td>
<tr>
</tr>
<td width="100px" nowrap>告警级别</td>
<td bgcolor=red >严重</td>
<tr>
</tr>
<td width="100px" nowrap>告警状态</td>
<td bgcolor=red >PROBLEM</td>
<tr>
</tr>
<td width="100px" nowrap>详细内容</td>
<td >""" + mail_result + """</td>
<tr>
<td width="100px" nowrap>发生时间</td>
<td >""" + now_time + """</td>
</tr>
</table>
</body>
</html>""","html","utf-8")
msg['Subject'] = SUBJECT
msg['From']=FROM
msg['To']=TO
try:
server = smtplib.SMTP('localhost')
server.sendmail(FROM, TO, msg.as_string())
server.quit()
print "邮件发送成功！"
except Exception, e:
print "失败："+str(e)
###
if __name__ == '__main__':
#创建监控数据库连接，与是否可写，的监控表，下面是创建语句
#sql_user_info = """
#CREATE TABLE IF NOT EXISTS db_check_table (
#itemid INT(20),
#applicationid INT(20),
#hostid INT(20),
#name VARCHAR(255),
#du_name VARCHAR(255),
#item_name VARCHAR(255)
#)
#"""
insert_sql = """insert into db_check_table values ('10211','13564','456789','test-172.5.6.7','cpu','cpu ldie')"""
try:
query_with_timeout(insert_sql)
except Exception,e:
mail_result = str(e)
if mail_result != "successful" :
se_mail(mail_result)
