You could add encryption and authentication via ssh: https://guide.munin-monitoring.org/en/latest/example/transport/ssh.html or you could put it behind an nginx and wrap it in tls if you just want encryption.

Munin might be what you’re looking for. Very simple and easy to write your own plugins for if some information is missing.

http://munin-monitoring.org/

I did not verify my thoughts but I think this could be because ovh has big datacenters in Germany and quite a lot of Europeans use ovh.