2019-11-02T07:05:06.997546Z 0 [System] [MY-010116] [Server] /usr/sbin/mysqld (mysqld 8.0.17-0ubuntu2) starting as process 15016
2019-11-02T07:05:06.998387Z 0 [Warning] [MY-013242] [Server] --character-set-server: 'utf8' is currently an alias for the character set UTF8MB3, but will be an alias for UTF8MB4 in a future release. Please consider using UTF8MB4 in order to be unambiguous.
2019-11-02T07:05:06.998396Z 0 [Warning] [MY-013244] [Server] --collation-server: 'utf8_bin' is a collation of the deprecated character set UTF8MB3. Please consider using UTF8MB4 with an appropriate collation instead.
2019-11-02T07:05:07.021248Z 1 [ERROR] [MY-011011] [Server] Failed to find valid data directory.
2019-11-02T07:05:07.021320Z 0 [ERROR] [MY-010020] [Server] Data Dictionary initialization failed.
2019-11-02T07:05:07.021715Z 0 [ERROR] [MY-010119] [Server] Aborting
2019-11-02T07:05:07.022076Z 0 [System] [MY-010910] [Server] /usr/sbin/mysqld: Shutdown complete (mysqld 8.0.17-0ubuntu2)  (Ubuntu).