315-Ubuntu16.04 修改mysql5.7 的数据目录

环境安装参考： 306-Ubuntu16.04 安装LNAMP
Ubuntu16.04 修改mysql5.7.23 的root密码

1. 创建数据目录,并设置权限

> mkdir /51nst/data/mysql
> chown -R mysql:mysql /51nst/data/mysql
> chmod 700 -R /51nst/data/mysql

复制mysql默认目录数据

> cp -arx /var/lib/mysql/* /51nst/data/mysql/
> rm -rf /51nst/data/mysql/ib_logfile*

2. 修改vim /etc/apparmor.d/usr.sbin.mysqld

> vim /etc/apparmor.d/usr.sbin.mysqld

# 找到对应部分，进行修改
# Allow data dir access
#  /var/lib/mysql/ r,
#  /var/lib/mysql/** rwk,
  /51nst/data/mysql/ r,
  /51nst/data/mysql/** rwk,

重启

> service apparmor reload
> service apparmor restart

3. 配置mysql

> vim /etc/mysql/mysql.conf.d/mysqld.cnf

# 将对应部分进行修改
#datadir                = /var/lib/mysql 修改为如下
datadir         = /51nst/data/mysql

重启mysql

> service mysql restart

查看配置

> mysql -u root -p

mysql> show variables like '%datadir%';
+---------------+--------------------+
| Variable_name | Value              |
+---------------+--------------------+
| datadir       | /51nst/data/mysql/ |
+---------------+--------------------+
1 row in set (0.00 sec)