Poettering: Portable Services with systemd v239

Lennart Poettering describesthe new systemd "portable service" feature, which appears to be a new takeon containers. "Both resource bundling and isolation/sand-boxing areconcepts systemd has implemented to varying degrees for a longertime. Specifically, RootDirectory= and RootImage= have been around for along time, and so have been the various sand-boxing features systemdprovides. The Portable Services concept builds on that, putting thesefeatures together in a new, integrated way to make them more accessible andusable."