The oldschool way of doing this is programs like awstats that parse the web server logs, which can do all the things you're talking about and is in Debian/Ubunt

The oldschool way of doing this is programs like awstats that parse the web server logs, which can do all the things you're talking about and is in Debian/Ubuntu repos. I don't know if there's a fancier similar tool that people use these days, but AWStats gets the job done. I wouldn't say they record zero PII but they don't record much additional PII over what your logs already use.