批量查看mysql多从状态和修改多从主库指向

唐伯虎

　　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()