python mysql 导库，加入主从同步集群

Posted 2020-09-05

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。

[[email protected] 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!!!!!!!!!!!"