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Flatcar: OS Innovation with Systemd-Sysext
The current state of systemd-sysext in Flatcar and the next steps
When such additional software is brought in as a bunch of files placed on the root filesystem, we faced problems with updating them and with the lack of integration with the base OS. To help users extend Flatcar with systemd-sysext, we provide build recipes for common software projects and publish prebuilt extension images in the sysext-bakery repository. The mutable mode where the original directory becomes the upperdir of the overlay mount is also what is needed to load systemd-sysext images on traditional Linux distributions where/usr must be writable for the package manager.
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