D-Bus is a broker-based interprocess communication mechanism which has been used for ages in Linux's desktop environments like GNOME or KDE.

systemd, the Linux init system and service manager, likewise consists of many loosely coupled components. Since systemd's inception, likewise, its components are using D-Bus to communicate.

Over time, the systemd developers have become uncomfortable with the existing D-Bus implementation they were using. They created another implementation, sd-bus, tailored towards systemd's needs - minimal and fast.

This talk gives an overview of D-Bus and its concepts, and then shows how sd-bus is used to implement one's own interfaces and components. Out of its many language bindings, we will use Python to implement a use case, just to show how simple this is.

You will probably like the use of asyncio in the talk. For those of you who don't know what this is and what problems it solves, I'll try to explain, however hard that may be. I might fail though. If you are interested: my last year's talk Python, asyncio, libgpiod, and Pointless Blinking contains a deeper asyncio introduction.