Where does Icinga keep downtimes/comments/acknowledgements?

Hello, Icinga guru's )

I am using single Icinga2 installation with MySQL inside the Docker container. My problem is that it doesn't save scheduled downtimes to MySQL at all...

mysql> select * from icinga_scheduleddowntime; Empty set (0.00 sec)

mysql> select * from icinga_downtimehistory; Empty set (0.00 sec)


Same for comments and acknowledgements.


In my case Icinga preserve scheduled downtimes state between service restarts. But it loses all downtimes/comments/acknowledgements at Docker container recreation, regardless the fact, if I keep MySQL datadir outside the container, or not.


So I am wondering where Icinga keeps downtimes, comments and acknowledgements data )


Thanks