KubeCon + CloudNativeCon Europe 2025: Full Schedule

In-person
1-4 April 2025
Learn More and Register to Attend

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Please note: This schedule is automatically displayed in British Summer Time (BST) (UTC +1). To see the schedule in your preferred timezone, please select from the drop-down menu to the right, above "Filter by Date." The schedule is subject to change and session seating is available on a first-come, first-served basis.

14:30 BST

🚨 Contribfest: Extending Image Based Systems Using Systemd System Extensions

Wednesday April 2, 2025 14:30 - 15:45 BST

Level 3 | ICC Capital Suite 17

On general purpose image based systems such as Flatcar and Bootable Containers, users are encouraged to run all their applications using containers. To make updates safe and predictable, the system is mounted as read only and local modifications are discouraged.

While containers offer a lot of flexibility on Linux, there are still cases where installing binaries or running applications directly on the host operating system is preferred.

As a trade-off, Systemd's system extensions (sysexts) provide a mechanism to extend host's content while preserving the safety guarentees around updates. Some image based OS like Flatcar, Fedora CoreOS or Atomic Desktops are leveraging sysext images to provide container runtimes.

In this tutorial, Timothée and Mathieu will give you the fundamentals of sysexts to help you building, running and updating your very first sysext images. From simple sysext-images like Containerd to more complex ones: learn how to securely extend image based systems.

Speakers

Timothée Ravier

CoreOS engineer, Red Hat

CoreOS engineer at Red Hat, Fedora Silverblue and Kinoite maintainer, KDE developer and KDE Flatpak maintainer.

Mathieu Tortuyaux

Software Engineer, Microsoft

Mathieu is working as a Linux OS software engineer @ Microsoft mainly involved in the Flatcar development (an open-source Container OS Linux distribution). He's involved in the test automation, release cycle and features development. Outside of the work, he co-founded SRE France... Read More →

Wednesday April 2, 2025 14:30 - 15:45 BST
Level 3 | ICC Capital Suite 17

🚨 Contribfest, Flatcar