在向MariaDB文件中添加数据行后无法重新启动my.cnf

Question

在将以下行添加到MariaDB的米舍尔德部分后，使my.cnf重新启动时出现问题：

datadir = /home/mysql

不会重启的。这可能是权限问题吗。这是保存我所有SQL数据的目录。以下是systemctl状态mysql.service显示的内容

● mariadb.service - MariaDB database server
   Loaded: loaded (/usr/lib/systemd/system/mariadb.service; disabled; vendor preset: disabled)
   Active: failed (Result: exit-code) since Wed 2021-11-10 08:33:00 CST; 36s ago
     Docs: man:mysqld(8)
           https://mariadb.com/kb/en/library/systemd/
  Process: 14438 ExecStart=/usr/lib/mysql/mysql-systemd-helper start (code=exited, status=1/FAILURE)
  Process: 14425 ExecStartPre=/usr/lib/mysql/mysql-systemd-helper upgrade (code=exited, status=0/SUCCESS)
  Process: 14412 ExecStartPre=/usr/lib/mysql/mysql-systemd-helper install (code=exited, status=0/SUCCESS)
 Main PID: 14438 (code=exited, status=1/FAILURE)
   Status: "MariaDB server is down"

Nov 10 08:33:00 law-amp3 mysql-systemd-helper[14438]: 2021-11-10  8:33:00 0 [Note] /usr/sbin/mysqld (mysqld 10.4.17-MariaDB-log) starting as process 14438 ...
Nov 10 08:33:00 law-amp3 mysql-systemd-helper[14438]: 2021-11-10  8:33:00 0 [Warning] Could not increase number of max_open_files to more than 1024 (request: 32214)
Nov 10 08:33:00 law-amp3 mysql-systemd-helper[14438]: 2021-11-10  8:33:00 0 [Warning] Changed limits: max_open_files: 1024  max_connections: 151 (was 151)  table_cache: 421 (was 2000)
Nov 10 08:33:00 law-amp3 mysql-systemd-helper[14438]: 2021-11-10  8:33:00 0 [Warning] Can't create test file /home/mysql/law-amp3.lower-test
Nov 10 08:33:00 law-amp3 mysql-systemd-helper[14438]: [87B blob data]
Nov 10 08:33:00 law-amp3 mysql-systemd-helper[14438]: 2021-11-10  8:33:00 0 [ERROR] Aborting
Nov 10 08:33:00 law-amp3 systemd[1]: mariadb.service: Main process exited, code=exited, status=1/FAILURE
Nov 10 08:33:00 law-amp3 systemd[1]: Failed to start MariaDB database server.
Nov 10 08:33:00 law-amp3 systemd[1]: mariadb.service: Unit entered failed state.
Nov 10 08:33:00 law-amp3 systemd[1]: mariadb.service: Failed with result 'exit-code'.

Answer 1

听起来像是权限问题。确保目录的所有者是mysql。例如

chown --reference=/var/lib/mysql /home/mysql
chmod --reference=/var/lib/mysql /new/dir/for/mysql

编辑：

查看服务文件是否有ProtectHome

vi /usr/lib/systemd/system/mariadb.service

将ProtectHome=true更改为ProtectHome=false

保存文件

systemctl daemon-reload

重新启动mariadb