1. M1和M2服务器
   grant replication slave,replication client on *.* to 'hanlf'@'%' identified by '123456';
2. M1服务器配置
   vim /etc/my.cnf
   server-id=23
   log-bin=mysql-bin
   gtid-mode=ON
   enforce-gtid-consistency=ON
   auto_increment_increment=2
   auto_increment_offset=1
3. M2服务器配置
   vim /etc/my.cnf
   server-id=24
   log-bin=mysql-bin
   gtid-mode=ON
   enforce-gtid-consistency=ON
   auto_increment_increment=2
   auto_increment_offset=2
4. M1服务器
   change master to master_host='192.168.2.23',master_port=3306,master_user='hanlf',master_password='123456',master_auto_position=1;
   start slave;
5. M2服务器
   change master to master_host='192.168.2.24',master_port=3306,master_user='hanlf',master_password='123456',master_auto_position=1;
   start slave;