Disclaimer: I am not using either, but here some pointers.
Did you need to do it all by yourself or can you use OpenHABian. The configurations are not super difficult but can be a little tricky and OpenHABian is doing it all for you, right out of the box:
https://www.openhab.org/docs/tutorial/logs.html#looking-to-the-logs
You can do that, but you will then need to ensure that you pull the right persistence service. You probably have your reasons, but at first glance it seems simply to be a duplication, as you can have influxDB persist everything that rrd4j would be able to persist.
Did you search the forum? there are quite a few threads on this, e.g., InfluxDB+Grafana persistence and graphing (watch out, this is a really long thread)
You may want to look into setting the log-levels to a lower level for OH2 to be more verbose: Logging | openHAB