#!/usr/bin/env python

import time,MySQLdb

from subprocess import Popen

from subprocess import PIPE

import dns.query

import dns.message

import dns.tsig

import dns.tsigkeyring

import dns.update

def set_dns(ip_list):

   key=dns.tsigkeyring.from_text({"cui.com":"SIvcwHj3goqYl0vKS6yOtdugxIaqtwPE43LpB6p9QFpbRmY+ekPrscHz je1hla5RBrB1R1DBnzu9AzT9fVEtfw=="})

   up=dns.update.Update("cui.com",keyring=key)

   rl=[dns.rdata.from_text(dns.rdataclass.IN,dns.rdatatype.A,i) for i in ip_list]

   rs=dns.rdataset.from_rdata_list(60,rl)

   up.replace("s.db",rs)

   dns.query.tcp(up,‘127.0.0.1‘)

def getSlaveMsg(host,port,user,passwd,cmd):

   command="mysql -h %s -P %s -u %s -p%s -e ‘%s‘ "%(host,port,user,passwd,cmd)

   p=Popen(command,shell=True,stdout=PIPE)

   return p.stdout.readlines()

def getstatus(iostr,sqlstr,secstr,result):

   resultdict={}

   for i in result:

       if iostr in i:

           resultdict[iostr]=i.split(":")[1].split("\n")[0].strip()

       elif sqlstr in i:

           resultdict[sqlstr]=i.split(":")[1].split("\n")[0].strip()

       elif secstr in i:

           if not i.split(":")[1].split("\n")[0].strip()=="NULL":

               resultdict[secstr]=int(i.split(":")[1].split("\n")[0].strip())

           else:

               resultdict[secstr]=None

       else:

           pass

   return resultdict

def main(iostr,sqlstr,secstr,cmd,**slave_msg):

   repl_msg={}

   slave_status={}

   ip_list=[]

   for i in slave_msg.keys():

       host=slave_msg[i][0]

       port=slave_msg[i][1]

       user=slave_msg[i][2]

       passwd=slave_msg[i][3]

       result=getSlaveMsg(host,port,user,passwd,cmd)

       dic_result=getstatus(iostr,sqlstr,secstr,result)

       repl_msg[i]=[host,dic_result]

   for i in repl_msg.keys():

       if repl_msg[i][1][iostr] == "Yes" and repl_msg[i][1][sqlstr] == "Yes":

           slave_status[i]=True

       elif repl_msg[i][1][secstr] and repl_msg[i][1][secstr] < 2:

           slave_status[i]=True

       else:

           slave_status[i]=False

   for i in slave_status.keys():

       if slave_status[i]:

           ip_list.append(repl_msg[i][0])

   status_proportion=float(slave_status.values().count(True))/float(len(slave_status.values()))

   if status_proportion > 0.6:

       set_dns(ip_list)

   else:

       pass

   return slave_status,ip_list

if __name__ =="__main__":

   iostr,sqlstr,secstr,cmd=["Slave_IO_Running","Slave_SQL_Running","Seconds_Behind_Master","show slave status\\G"]

   slave_msg={"hostname":["ipaddress",port,"user","passwd"],

              "hostname":["ipaddress",port,"user","passwd"],

              "hostname":["ipaddress",port,"user","passwd"],

              }

   repl_msg=main(iostr,sqlstr,secstr,cmd,**slave_msg)

   print repl_msg

本文出自 “原创python发布区” 博客，请务必保留此出处http://cuihailong.blog.51cto.com/2923450/1409795