Is Nginx official
ngx_mod_http_geoip compatible with GeoLite2 databases ? I can't get them working, so I assume they are not compatible ?
ngx_mod_http_geoip is not compatible with GeoIP2 databases; you will need the ngx_http_geoip2_module instead. Note, however, that as of this writing the
nginx distribution packages I'm aware of don't include the
ngx_http_geoip2_module and you will need to compile NGINX from source and include
ngx_http_geoip2_module. See these instructions for an example of building this for Ubuntu.
Disclaimer: I wrote these instructions.
I found this site https://www.miyuru.lk/geoiplegacy which has recent datasets in DAT format converted from newer database formats.
These are compatible with the older nginx geoip module. So no need to build the geoip2 module from source.
The official module is called ngx_http_geoip_module and according to the documentation, requires the MaxMind GeoIP library.
Given the official documentation, yes, you can assume they are not compatible, and that you really need the required one instead.