pythonmysql导库加入主从同步集群实例介绍

脚本可以在任意机器上执行(需要安装mysql,至少是mysql客户端,mysql只能版本为5.6及以上),首先输入源ip,检测源ip上的mysql是否正常运行,再在本机dump mysql数据库,然后将dump文件传输到目的服务器,在目的服务器上导入数据库,最后把从库加入到现用集群中。

[root@master test]# cat finaly_mysql.py

#!/usr/bin/env python

#-*- coding: utf-8 -*-

import mysqldb, socket, paramiko,sys, os,datetime, time

sour_db=raw_input(‘please input the source mysql database ip:’)

dest_db=raw_input(‘please input the destination mysql database ip:’)

password=raw_input(‘please input the sour_db root users password :’)

def check_port(ip,port):

print “test whether source mysql db is running!”

res=socket.socket(socket.af_inet, socket.sock_stream)

res.settimeout(3)

try:

res.connect((ip,port))

print ‘server port 3306 ok!’

print(“\033[41;36m server port 3306 ok! \033[0m”)

except exception,e:

print exception,”:”,e

print “break this program”

sys.exit()

res.close()

#查看源库的3306端口是否正常

def begin_dump():

print “begin dump remote mysql,please waiting…!”

print(“\033[41;36m begin dump remote mysql,please waiting…! \033[0m”)

hostname=sour_db

username=’root’

dump=’mysqldump -uroot -pxp29at5f37 -h 192.168.3.10 -a -b > /tmp/dump.sql && echo $? ‘

if os.popen(dump).read().strip() == ‘0’:

print “dump result is 0,means dump success”

print(“\033[41;36m dump result is 0,means dump success \033[0m”)

else:

print “\033[1;31;40m%s\033[0m” % “dump error,exit python file”

sys.exit()

#从本地 dump数据库文件

def trans_dump():

print ” “

local_dir=’/tmp’

remote_dir=’/tmp’

dest_dir=’/tmp’

print ” “

print “begin transfer mysql dump file from local server to destination mysql database server ,please waiting…!”

try:

t=paramiko.transport((dest_db,22))

t.connect(username=’root’,password=password)

sftp=paramiko.sftpclient.from_transport(t)

files=’dump.sql’

print “\033[1;32;40m%s\033[0m” % “transfer back file,please wait ….”

print ‘ beginning to transfer file to %s %s ‘ % (dest_db,datetime.datetime.now())

print ‘ transfering file:’,dest_db + ‘:’ + os.path.join(local_dir,files)

sftp.put(os.path.join(local_dir,files),os.path.join(dest_dir,files))

t.close()

print ‘ transfer all dump file success %s ‘ % datetime.datetime.now()

except exception,e:

print exception,”\033[1;31;40m%s\033[0m” % “:”, “\033[1;31;40m%s\033[0m” % e

sys.exit()

#将数据库文件从本地传输到目的服务器,即dest_db

def import_dump():

conn=mysqldb.connect(host=dest_db,user=’root’,passwd=’xp29at5f37′,db=’test’)

cur1=conn.cursor()

cur1.execute(“stop slave;”)

cur1.close()

cur2=conn.cursor()

cur2.execute(“reset master;”)

cur2.close()

cur3=conn.cursor()

cur3.execute(“reset slave all;”)

cur3.close()

conn.close()

print ” “

print “begin to import mysql dump file ,please waiting…!”

local_dir=’/tmp’

remote_dir=’/tmp’

dest_dir=’/tmp’

import_command = “mysql -uroot -pleyou < /tmp/dump.sql"

print ‘ begin import dump file ,it may take a long time, please be patient !!!’

try:

ssh =paramiko.sshclient ()

ssh.load_system_host_keys ()

ssh.connect (hostname =dest_db,username =’root’,password =password)

stdin, stdout, stderr = ssh.exec_command (import_command)

print stderr.read ()

ssh.close ()

except exception,e:

print exception,”:”,e

print “import over”

#导入之前先将dest_db的slave 都停掉,因为不知道dest_db的状态,可能之前是个主库,也可能是其他机子的从库。

def final_check_mysql ():

print ” “

print “finally check mysql service “

status = true

try:

conn=mysqldb.connect(host=dest_db,user=’root’,passwd=’xp29at5f37′,db=’test’)

cur1=conn.cursor()

cur1.execute(“change master to master_host=’192.168.3.10′, master_user=’root’, master_password=’xp29at5f37′, master_auto_position=1;”)

cur1.close()

cur3=conn.cursor()

cur3.execute(“start slave;”)

cur3.close()

print “sleep 10 seconds;”

time.sleep(10)

cur2=conn.cursor()

cur2.execute(“show slave status;”)

result = cur2.fetchall()

io_thread= result[0][10]

sql_thread= result[0][11]

print io_thread,sql_thread

if io_thread == “yes” and sql_thread == “yes”:

print ‘mysql master/slave replication status is successfully’

else:

print ‘mysql master/slave replication fail,please check it’

cur2.close()

conn.close()

except exception,e:

print exception,”\033[1;31;40m%s\033[0m” % “:”, “\033[1;31;40m%s\033[0m” % e

status = true

return status

#最后检查新从库的运行状态,同步是否正常

if __name__ == “__main__”:

a=check_port(sour_db,3306)

b=begin_dump()

c=trans_dump()

d=import_dump()

e=final_check_mysql()

print “dump file ok!!!!!!!!!!!”

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