home-assistant.io/source/more-info/unsupported/systemd.markdown

title	description
Systemd	More information on why systemd marks the installation as unsupported.

The issue

The Supervisor uses systemd over DBus to control the Host system and get information. Without systemd, we miss a lot of information and functionality.

The solution

You need to reinstall the host running the Supervisor with one of the supported operating systems, see instructions here.