После очередных правок конфига mysql, перестал запускаться. В логах следующая ошибка
Dec 25 21:29:18 zabbix mariadb-prepare-db-dir[13905]: [74B blob data] Dec 25 21:29:18 zabbix mariadb-prepare-db-dir[13905]: Fatal error in defaults handling. Program aborted Dec 25 21:29:18 zabbix mariadb-prepare-db-dir[13905]: [74B blob data] Dec 25 21:29:18 zabbix mariadb-prepare-db-dir[13905]: Fatal error in defaults handling. Program aborted Dec 25 21:29:18 zabbix mariadb-prepare-db-dir[13905]: [74B blob data] Dec 25 21:29:18 zabbix mariadb-prepare-db-dir[13905]: Fatal error in defaults handling. Program aborted Dec 25 21:29:18 zabbix mariadb-prepare-db-dir[13905]: Database MariaDB is probably initialized in /var/lib/mysql already, nothing is done. Dec 25 21:29:18 zabbix mariadb-prepare-db-dir[13905]: If this is not the case, make sure the /var/lib/mysql is empty before running mariadb-prepare-db-dir. Dec 25 21:29:18 zabbix mariadb-wait-ready[13939]: [74B blob data] Dec 25 21:29:18 zabbix mariadb-wait-ready[13939]: Fatal error in defaults handling. Program aborted Dec 25 21:29:18 zabbix mariadb-wait-ready[13939]: [74B blob data] Dec 25 21:29:18 zabbix mariadb-wait-ready[13939]: Fatal error in defaults handling. Program aborted Dec 25 21:29:18 zabbix mysqld_safe[13938]: [74B blob data] Dec 25 21:29:18 zabbix mysqld_safe[13938]: Fatal error in defaults handling. Program aborted Dec 25 21:29:18 zabbix mysqld_safe[13938]: [74B blob data] Dec 25 21:29:18 zabbix mysqld_safe[13938]: Fatal error in defaults handling. Program aborted Dec 25 21:29:18 zabbix mysqld_safe[13938]: 171225 21:29:18 mysqld_safe Logging to '/var/lib/mysql/zabbix.err'. Dec 25 21:29:18 zabbix mysqld_safe[13938]: 171225 21:29:18 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql Dec 25 21:29:19 zabbix systemd[1]: mariadb.service: control process exited, code=exited status=1 Dec 25 21:29:19 zabbix systemd[1]: Failed to start MariaDB database server. -- Subject: Unit mariadb.service has failed -- Defined-By: systemd
Решение, простое.
В конце конфигурационного файла нужно просто добавить пустую строку.