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Master explains how to modify the mariadb database storage path in Centos7.3

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Release: 2024-07-22 15:01:11
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Master explains how to modify the mariadb database storage path in Centos7.3

如果你不知道当前数据库路径,只需要输入以下命令即可查看到:

回车后输入您的mariadb密码后回车

# mysql -uroot -p
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输以下命令显示各种mariadb的路径调用情况。其中datadir项就是现存储的路径。

MariaDB [(none)]> show variables like ‘%dir%’;

退出数据库登录状态

MariaDB [(none)]> exit;
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停止数据库

# systemctl stop mysql.server
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新建mariadb新存储的路径文件夹

# mkdir -p /home/mysql/data
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进入home目录

# cd /home
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给新的路径文件夹mysql用户权限

# chown -R mysql:mysql /mysql
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修改下面启动脚本mysql文件中的datadir路径,mysql启动脚本路径不一样,也有可能会在/usr/lib/systemd/system目录下(centos7)

# vi /etc/init.d/mysql
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找到datadir=/var/lib/mysql修改成datadir=/home/mysql/data,如果有相同的/var/lib/mysql路径,同样修改为/home/mysql/data,

例如:

“innodb_data_home_dir”和“innodb_log_group_home_dir“
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修改后保存并退出,在修改my.cnf中的数据存储路径

修改my.cnf文件中datadir=路径和上面修改的方法一样,修改还好以后保存并退出,然后启动mariadb服务。

# vi /etc/my.cnf

# systemctl start mysql.server
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注意:如果你有数据文件,那么就把你的贝到/home/mysql/data下,还有/var/lib/mysql下的mysql件夹也拷贝过去,其他文件就不要拷贝了,这样你新建的用户和密码都会是你以前的。如果拷贝所有文件,就会启动报错。

如果以上方式不能成功且启动报错,可以在重启失败后执行初始化数据库命令,执行数据库命令前,/home/mysql/data下必须是空的,初始化成功后再导入数据库,以下是初始化数据库的命令:

# /usr/local/mysql/scripts/mysql_install_db –user=mysql –basedir=/usr/local/mysql –datadir=/home/mysql/data
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再次启动就正常了

# systemctl restart mysql.server
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初始化成功后,数据库密码是空的,执行以下命令开始设置密码

# /usr/local/mysql/bin/mysql_secure_installation
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注意:第一个是提示你输入mysql密码,其实新安装的mysql默认是空密码,然后直接回车输入两次新密码回车,接下来全部按Y即可(基本上是删除了test测试数据库和匿名账号和删除后立刻生效(最后一个Y))。

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source:linuxprobe.com
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