I'm opening a feature request for feature that was already done on 1.8: influxdata/influxdb#10294
It was done by @bthesorceror on influxdata/influxdb#16599.

The idea is to allow specifying a sub-path on the URL, so the client could work when an HTTP reverse proxy is routing the requests based on the path. For example, using a URL: https://example.com/influxdb/.

Apparently, this support was removed on version 2, as the flags no longer exists.

Is it possible to support this?

Thanks,
Yehoshua