A cloud centos change after installing MariaDB 10.3 7 data storage directory

The original system reinstall the system disk, then install MariaDB, if you also want to use the original database:

#--------------------------add by root-----------------------------
# add for moving data to /data/mysql_data
# vim /etc/my.cnf.d/server.cnf 在[mysqld]标签下添加如下内容
# https://www.cnblogs.com/ld1977/p/7264485.html
#原目录
datadir=/opt/mysql
socket=/var/lib/mysql/mysql.sock
#default-character-set=utf8
character_set_server=utf8
slow_query_log=on
slow_query_log_file=/opt/mysql/slow_query_log.log
long_query_time=2