CentOS changes MySQL database directory

centos change mysql Database directory

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This tutorial passed the test MySQL edition ：

• centos7
• mysql5.7.32 and mysql5.7.27
• Other database versions should be the same , Not tested yet

1. Stop mysql service

systemctl stop msyql

Tips ：centos Of selinux I need to set to disabled, After setting, you need to restart the server

vim /etc/selinux/config

Or perform setenforce 0 close selinux, Provisional entry into force

2. Create a new mysql Database directory

# The specific directory location can be created according to your own needs 
mkdir /opt/mysqldata

The next step is to install by default mysql Move to the newly created mysqldata Under the table of contents

3. Move mysql To the newly created directory

Because it's through rpm The way to install mysql,mysql By default, it will be stored in /var/lib/mysql Catalog

hold /var/lib/msyql Move the whole to /opt/mysqldata/

mv /var/lib/mysql /opt/mysqldata/

4. Set up mysqldata Directory permissions

change mysqldata User name and user group of directory

chown -R mysql:mysql /opt/mysqldata/mysql

modify mysqldata Access to directory

chmod 755 /opt/mysqldata/mysql
# Set the outermost layer directly , Set only one mysql May not be enough 
chmod 755 /opt

5. modify /etc/my.cnf

It needs to be revised my.cnf The path in the file points to the new directory

# modify datadir For the new directory address 
#datadir=/var/lib/mysql
datadir=/opt/mysql/mysql

# modify socket For the new directory address 
#socket=/var/lib/mysql/mysql.sock
socket=/opt/mysql/mysql/mysql.sock

# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0

# adopt rpm Installed , Will it client modular , Need to add , Otherwise mysql -u -p The command cannot log in to mysql
[client]
socket=/opt/mysql/mysql/mysql.sock

# adopt rpm Installed , Will it [mysql_safe], Need to add 
[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid

The contents of the red box are added and modified on the basis of the original document

After this change, you can restart

systemctl start mysqld

6. The verification results

Sign in mysql

mysql -u root -p

Check the database address

select @@datadir;