使用rpm安裝方式安裝完MySQL數(shù)據(jù)庫(kù)后，數(shù)據(jù)文件的默認(rèn)路徑為/var/lib/mysql，然而根目錄并不適合用于存儲(chǔ)數(shù)據(jù)文件。

原路徑：/var/lib/mysql

目標(biāo)路徑：/home/mysql_data/mysql

Linux系統(tǒng)版本：centos7.6

MySQL數(shù)據(jù)庫(kù)版本：5.7.25

步驟：

1、創(chuàng)建目標(biāo)路徑

mkdir -p /home/mysql_data

2、關(guān)閉MySQL

systemctl stop mysqld

3、復(fù)制數(shù)據(jù)文件

cp -arp /var/lib/mysql /home/mysql_data

4、修改配置文件/etc/my.cnf

將datadir和socket中的原路徑修改為目標(biāo)路徑

datadir=/home/mysql_data/mysqlsocket=/home/mysql_data/mysql/mysql.sock

5、啟動(dòng)MySQL服務(wù)

systemctl start mysqld

NOTE:

1、報(bào)錯(cuò)如下：

2019-12-22T08:32:42.430564Z 0 [ERROR] InnoDB: Operating system error number 13 in a file operation.
2019-12-22T08:32:42.430599Z 0 [ERROR] InnoDB: The error means mysqld does not have the access rights to the directory.
2019-12-22T08:32:42.430616Z 0 [Note] InnoDB: Creating shared tablespace for temporary tables
2019-12-22T08:32:42.430898Z 0 [ERROR] InnoDB: The innodb_temporary data file 'ibtmp1' must be writable
2019-12-22T08:32:42.430923Z 0 [ERROR] InnoDB: The innodb_temporary data file 'ibtmp1' must be writable
2019-12-22T08:32:42.430936Z 0 [ERROR] InnoDB: Could not create the shared innodb_temporary.
2019-12-22T08:32:42.430952Z 0 [ERROR] InnoDB: Plugin initialization aborted with error Generic error
2019-12-22T08:32:43.038973Z 0 [ERROR] InnoDB: Operating system error number 13 in a file operation.
2019-12-22T08:32:43.039021Z 0 [ERROR] InnoDB: The error means mysqld does not have the access rights to the directory.
2019-12-22T08:32:43.039037Z 0 [ERROR] Plugin 'InnoDB' init function returned error.
2019-12-22T08:32:43.039046Z 0 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
2019-12-22T08:32:43.039056Z 0 [ERROR] Failed to initialize builtin plugins.
2019-12-22T08:32:43.039063Z 0 [ERROR] Aborting

解決：

執(zhí)行命令：

setenforce 1

再重新啟動(dòng)

2、報(bào)錯(cuò)如下：

Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock'

解決：

修改配置文件my.cnf,添加或修改如下配置：

[client]socket = /home/mysql_data/mysql/mysql.sock

總結(jié)

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