mysql8.0 mysqld: File './binlog.index' not found

mysql8.0啓動時報錯 mysqld: File './binlog.index' not found (OS errno 13 - Permission denied)

修改數據庫的路徑啓動時 Job for mysqld.service failed because the control process exited with error code. See "systemctl status mysqld.service" and "journalctl -xe" for details. 錯誤，查看log信息發現如下錯誤：

2018-09-08T04:57:22.077305Z 0 [System] [MY-010116] [Server] /usr/sbin/mysqld (mysqld 8.0.12) starting as process 16425
mysqld: File './binlog.index' not found (OS errno 13 - Permission denied)
2018-09-08T04:57:22.079492Z 0 [ERROR] [MY-010119] [Server] Aborting
2018-09-08T04:57:22.079662Z 0 [System] [MY-010910] [Server] /usr/sbin/mysqld: Shutdown complete (mysqld 8.0.12)    MySQL Community Server - GPL.

緣由：

是由於在複製數據時，沒有修改權限。

解決方法：

chgrp -R mysql /alidata/mysql && chown -R mysql /alidata/mysql