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!!!!!!!!!!!”
以上就是python mysql导库加入主从同步集群实例介绍的详细内容，更多请关注 第一php社区 其它相关文章！