CentOS 7下mysql 8修改datadir之后不能启动

尝试修改了mysql的datadir参数， 同时将数据文件拷贝到了新的目录/data下， 但是启动mysql服务时，提示： [root@mysql8-01 data]# systemctl status mysqld ● mysqld.service - MySQL Server    Loaded: loaded (/usr/lib/systemd/system/mysqld.service; enabled; vendor preset: disabled)    Active: failed (Result: exit-code) since Wed 2019-07-03 10:42:07 CST; 14s ago      Docs: man:mysqld(8)            http://dev.mysql.com/doc/refman/en/using-systemd.html   Process: 2907 ExecStart=/usr/sbin/mysqld $MYSQLD_OPTS (code=exited, status=1/FAILURE)   Process: 2885 ExecStartPre=/usr/bin/mysqld_pre_systemd (code=exited, status=0/SUCCESS)  Main PID: 2907 (code=exited, status=1/FAILURE)    Status: "SERVER_BOOTING"     Error: 13 (Permission denied) Jul 03 10:42:06 mysql8-01 systemd[1]: Starting MySQL Server... Jul 03 10:42:07 mysql8-01 systemd[1]: mysqld.service: main process exited, code=exited, status=1/FAILURE Jul 03 10:42:07 mysql8-01 systemd[1]: Failed to start MySQL Server. Jul 03 10:42:07 mysql8-01 systemd[1]: Unit mysqld.service entered failed state. Jul 03 10:42:07 mysql8-01 systemd[1]: mysqld.service failed. 查看mysql日志，发现有如下警告 2019-07-03T02:38:28.679543Z 0 [System] [MY-010910] [Server] /usr/sbin/mysqld: Shutdown complete (mysqld 8.0.14)  MySQL Community Server - GPL. mysqld: File './binlog.index' not found (OS errno 13 - Permission denied) 2019-07-03T02:40:21.848131Z 0 [Warning] [MY-010091] [Server] Can't create test file /data/mysql8-01.lower-test 2019-07-03T02:40:21.848279Z 0 [System] [MY-010116] [Server] /usr/sbin/mysqld (mysqld 8.0.14) starting as process 2822 2019-07-03T02:40:21.867130Z 0 [Warning] [MY-010091] [Server] Can't create test file /data/mysql8-01.lower-test 2019-07-03T02:40:21.867181Z 0 [Warning] [MY-010159] [Server] Setting lower_case_table_names=2 because file system for /data/ is case insensitive 2019-07-03T02:40:21.868211Z 0 [ERROR] [MY-010119] [Server] Aborting 2019-07-03T02:40:21.868431Z 0 [System] [MY-010910] [Server] /usr/sbin/mysqld: Shutdown complete (mysqld 8.0.14)  MySQL Community Server - GPL. mysqld: File './binlog.index' not found (OS errno 13 - Permission denied) 2019-07-03T02:42:07.555956Z 0 [Warning] [MY-010091] [Server] Can't create test file /data/mysql8-01.lower-test 2019-07-03T02:42:07.556036Z 0 [System] [MY-010116] [Server] /usr/sbin/mysqld (mysqld 8.0.14) starting as process 2907 2019-07-03T02:42:07.558851Z 0 [Warning] [MY-010091] [Server] Can't create test file /data/mysql8-01.lower-test 2019-07-03T02:42:07.558865Z 0 [Warning] [MY-010159] [Server] Setting lower_case_table_names=2 because file system for /data/ is case insensitive 2019-07-03T02:42:07.559679Z 0 [ERROR] [MY-010119] [Server] Aborting 2019-07-03T02:42:07.559877Z 0 [System] [MY-010910] [Server] /usr/sbin/mysqld: Shutdown complete (mysqld 8.0.14)  MySQL Community Server - GPL. 这里，需要将Selinux关闭： [root@mysql8-01 data]# vi /etc/selinux/config  [root@mysql8-01 data]#  [root@mysql8-01 data]# setenforcing 0 bash: setenforcing: command not found... [root@mysql8-01 data]# setenforce 0 [root@mysql8-01 data]#  [root@mysql8-01 data]#  [root@mysql8-01 data]# systemctl start mysqld [root@mysql8-01 data]#  [root@mysql8-01 data]#  [root@mysql8-01 data]# systemctl status mysqld ● mysqld.service - MySQL Server    Loaded: loaded (/usr/lib/systemd/system/mysqld.service; enabled; vendor preset: disabled)    Active: active (running) since Wed 2019-07-03 10:46:09 CST; 5s ago      Docs: man:mysqld(8)            http://dev.mysql.com/doc/refman/en/using-systemd.html   Process: 3020 ExecStartPre=/usr/bin/mysqld_pre_systemd (code=exited, status=0/SUCCESS)  Main PID: 3042 (mysqld)    Status: "SERVER_OPERATING"    CGroup: /system.slice/mysqld.service            └─3042 /usr/sbin/mysqld Jul 03 10:46:06 mysql8-01 systemd[1]: Starting MySQL Server... Jul 03 10:46:09 mysql8-01 systemd[1]: Started MySQL Server. 再此尝试启动，成功