In your case you need an icingadb mariadb database like described here:
https://icinga.com/docs/icinga-db/latest/doc/02-Installation/04-RHEL/#setting-up-a-mysql-or-mariadb-database
then you need to configure icingadb like described here:
https://icinga.com/docs/icinga-db/latest/doc/03-Configuration/
then you need to enable the icingadb feature like described here:
https://icinga.com/docs/icinga-2/latest/doc/09-object-types/#icingadb
after that your icingadb should work and you can continue to configure icingadb-web and / or use the ido migration command