（1）查看server1的uuid
[root@server1 mysql]# cat /var/lib/mysql/auto.cnf
[auto]
server-uuid=db6e25ff-b049-11e9-84f5-525400ca9499
（2）在server1和server2中删掉之前的数据，保证数据一致
[root@server1 ~]# systemctl stop mysqld
[root@server1 ~]# cd /var/lib/mysql
[root@server1 mysql]# ls
auto.cnf ibdata1 mysql-bin.000002 private_key.pem
ca-key.pem ib_logfile0 mysql-bin.000003 public_key.pem
ca.pem ib_logfile1 mysql-bin.index server-cert.pem
client-cert.pem ibtmp1 mysql.sock server-key.pem
client-key.pem mysql mysql.sock.lock sys
ib_buffer_pool mysql-bin.000001 performance_schema westos
[root@server1 mysql]# rm -fr *
[root@server1 ~]# systemctl start mysqld
(3)server3安装mysql
（4）server1 server2 sever3 都进行安全初始化登陆
cat /var/log/mysqld.log | grep password
mysql_secure_installation
