http://shobon.hatenablog.com/entry/2012/07/09/223100
sudo docker exec -ti zabbix_zabbix-db_1 /zabbix-backup/zabbix-mariadb-dump -u zabbix -p my_password -o /backups
sudo docker exec -it zabbix_zabbix-db_1 /bin/bash
mysql -u zabbix -p
drop database zabbix;
create database zabbix;
grant all privileges on zabbix.* to zabbix@localhost ;
q;
mysql -u zabbix -p my_password zabbix < /backups/20171011-1356_db-3.0.0.sql