批量查看mysql多从状态和修改多从主库指向

本脚本主要解决批量查看mysql多从状态和修改多从主库指向，并打印出执行结果。适用于主库没有做高可用或是做高可用但是V-IP没有漂移到新的主库上的问题。代码如下：

#!/usr/bin/env python

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

import MySQLdb,sys,os,threading,time

user = 'root'

passwd = '1q2w3e4r'

#mysql执行change master命令的用户名和密码

def log_w(text):#写日志

    logfile = "slave_res.txt"

    f = open(logfile,'a+')

    f.write(text)

    f.close()

def db_conn(host,res,flag):

    text = "###################_____%s_____###################\n\n" % host

    try:

        conn = MySQLdb.connect(host = host,port = 6006,user = user,passwd = passwd,charset="utf8",connect_timeout = 5)

        cursor = conn.cursor(cursorclass = MySQLdb.cursors.DictCursor)

        sql = '''show slave status'''

        cursor.execute(sql)#查看当前同步信息

        alldata = cursor.fetchall()

        if len(alldata) != 0:#如果没有同步信息则抛错，退出

            if  alldata[0]['Master_Log_File']==alldata[0]['Relay_Master_Log_File'] and alldata[0]['Read_Master_Log_Pos']==alldata[0]['Exec_Master_Log_Pos']:

                text = text + "OK"   + '\t' + 'Master_Host:' + str(alldata[0]['Master_Host']) + '   ' + str(alldata[0]['Master_Log_File']) + '   ' + str(alldata[0]['Relay_Master_Log_File']) + '   ' + str(alldata[0]['Read_Master_Log_Pos']) + '   ' + str(alldata[0]['Exec_Master_Log_Pos']) + '   ' + str(alldata[0]['Seconds_Behind_Master'])+'\n'

                if flag == '1':

                    try:

                        sql = "stop slave;"

                        cursor.execute(sql)#停止从库同步

                    except Exception, e:

                        pass

                    sql = '''change master to master_host='192.10.100.100',master_user='rep_slave',master_password='rEeMAKEreplication6210',master_port=6006,master_log_file='mysql-bin.000100',master_log_pos=300;'''

                    cursor.execute(sql)#执行change master语句

                    sql = "start slave;"

                    cursor.execute(sql)#开启同步

                    sql = 'show slave status'

                    cursor.execute(sql)#查看最新的同步信息

                    alldata = cursor.fetchall()

                    if  (alldata[0]['Slave_IO_Running'] == 'Yes') and (alldata[0]['Slave_SQL_Running'] == 'Yes'):

                        text = text + "OK"   + '\t' + 'Master_Host:' + str(alldata[0]['Master_Host']) + '   ' + str(alldata[0]['Master_Log_File']) + '   ' + str(alldata[0]['Relay_Master_Log_File']) + '   ' + str(alldata[0]['Read_Master_Log_Pos']) + '   ' + str(alldata[0]['Exec_Master_Log_Pos']) + '   ' + str(alldata[0]['Seconds_Behind_Master'])+'\n'

                    else:

                        text = text + "Start Slave Error"   + '\t' + 'Master_Host:' + str(alldata[0]['Master_Host']) + '\t' + 'Slave_IO_Running: '+str(alldata[0]['Slave_IO_Running']) + '\t' + 'Slave_SQL_Running:' + str(alldata[0]['Slave_SQL_Running']) + '\n'

            else:

                text = text + "Slave Error"   + '   ' + 'Master_Host:' + str(alldata[0]['Master_Host']) + '   ' + str(alldata[0]['Master_Log_File']) + '   ' + str(alldata[0]['Relay_Master_Log_File']) + '   ' + str(alldata[0]['Read_Master_Log_Pos']) + '   ' + str(alldata[0]['Exec_Master_Log_Pos']) + str(alldata[0]['Seconds_Behind_Master'])+'\n'

        else:

            text = text + "Error,This host not set slave information"

        cursor.close()

        conn.close()

    except Exception, e:

        text = text + "Error" + '\t' + str(e)

    res.append(text)

def start(flag):

        threads = []

        res = []

        host_list = ['192.168.1.114','192.168.1.120']

        for host in host_list:

            t = threading.Thread(target=db_conn,args=(host,res,flag))

            t.setDaemon(True)

            threads.append(t)

        for i in range(len(threads)):

            threads[i].start()

            time.sleep(0.1)

        for i in range(len(threads)):

            threads[i].join()

        for i in res:

            if "Error" in i:

                print "\033[1;31;40m%s\033[0m" % i

            else:

                print i

            log_w(i)

        if flag == '1':

            text = "\nChange master finished"

            print text

            log_w(text)

        else:

            text = "\nSHOW SLAVE STATUS complete"

            print text

            log_w(text)

        text = "\n\n###################  %s   ###################\n\n" % time.strftime("%Y-%m-%d %H:%M:%S")

        print text

        log_w(text)

def main():

    print

    print "请选择操作类型：\n\n0:查看所有从库的同步状态\n1:改变所有从库的主库指向\n"#.decode("utf-8").encode("GBK")

    for i in range(3):

        choose = raw_input('Your choose : ')

        if choose == '0' or choose == '1':

            start(choose)

            break

        else:

            print "Error,please Enter right noumber again ."

    print

if __name__=='__main__':

    main()

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