Chaos Computer Club - archive feed

postmarketOS was started with the lofty goal of enabling long term support for mobile phones and other devices with traditionally short lifespans, and doing so outside of the Android walled garden. This has inevitably resulted in a lot of upstream focused hardware bringup and development. Join us and learn what our community have been building, how we're running systemd on Alpine Linux and what we...

This shows how to boot an [mkosi](https://github.com/systemd/mkosi) generated arm64 [Debian](https://debian.org) Image with [UKI](https://github.com/uapi-group/specifications/blob/main/specs/unified_kernel_image.md) and systemd-boot on a [u-boot](https://docs.u-boot.org/en/latest/develop/uefi/u-boot_on_efi.html) based EFI firmware with a [fTPM](https://github.com/microsoft/ms-tpm-20-ref/tree/main/...

Container runtimes and other privileged system management tools have historically struggled with safely operating on a path within a directory tree controlled by a malicious user. [libpathrs][] is a library which makes it easy to do said path operations, as well as providing some other safe path-related utilities such as providing safe wrappers to operate on procfs files in a safe way. [libpathrs]...

Why bother with Varlink IPC, and why now? The Varlink IPC has been around for a while, but recently we started using it heavily in systemd. In this talk I'd like to explain what Varlink IPC is, and why we are now adopting it so heavily. And I also want to explain why I think that Varlink is a good candidate as IPC of choice for any Linux software, both low-level and higher-level. We'll compare it...

Let's have an open discussion with systemd developers who are at ASG and users in the audience. We will open with the developers saying what they plan to work on in the near future, and then allow questions / comments from the audience. Licensed to the public under https://creativecommons.org/licenses/by/4.0/de/ about this event: https://cfp.all-systems-go.io/all-systems-go-2024/talk/YQZBGT/

A brief report about how we use io_uring in SLASH/fellow https://gitlab.com/uplex/varnish/slash, an always consistent, eventually persistent storage engine for Varnish-Cache. (FOSS, LGPL) Licensed to the public under https://creativecommons.org/licenses/by/4.0/de/ about this event: https://cfp.all-systems-go.io/all-systems-go-2024/talk/U7GJJW/

Ensuring consistent and secure software builds is crucial in today's cloud-native environments. At Sidero Labs, we've developed a comprehensive approach to reproducible builds for Talos Linux using a variety of tools and techniques. This talk will explore our use of Docker Buildx, Kres, and other key components that contribute to our build system. We'll share insights into our methods, challenges...

Same as every year, a lot has happened in the systemd project since last year's ASG. We released multiple versions, packed with new components and features. This talk will provide an overview of these changes, commenting on successes and challenges, and a sneak peak at what lies ahead. Licensed to the public under https://creativecommons.org/licenses/by/4.0/de/ about this event: https://cfp.all-sy...

Ideas for improving systemd-boot Licensed to the public under https://creativecommons.org/licenses/by/4.0/de/ about this event: https://cfp.all-systems-go.io/all-systems-go-2024/talk/DT3RCU/

A new way to develop on immutable Linux Licensed to the public under https://creativecommons.org/licenses/by/4.0/de/ about this event: https://cfp.all-systems-go.io/all-systems-go-2024/talk/NSKLAR/

Integration testing environment for mixed HPC and cloud workloads Licensed to the public under https://creativecommons.org/licenses/by/4.0/de/ about this event: https://cfp.all-systems-go.io/all-systems-go-2024/talk/XNQLTE/

This presentation will review how far Debian (and more generally, traditional distributions) is from supporting factory reset: what can work, what is missing and possible hacks^Wways to do it without starting a distribution-wide effort. Licensed to the public under https://creativecommons.org/licenses/by/4.0/de/ about this event: https://cfp.all-systems-go.io/all-systems-go-2024/talk/3K8NZT/

oo7-daemon (a temporary name based on the oo7 client library) project aims to provide a replacement for the gnome-keyring-daemon as the new D-Bus Secret Service provider in the GNOME desktop environment. In this talk I will go through the latest development plans and the progress made to integrate TPM backed credentials support to oo7-daemon using systemd per-user credentials as a backend. License...

A quick overview of how RAUC uses libcomposefs to handle new use-cases. Traditionally, RAUC focused on A/B updates for whole partitions, either by using filesystem images or tar archives. While the image-based OS approach has many benefits, there are scenarios where more loosely coupled components need to be handle in addition to the root filesystem. In RAUC, these can be handled with using the ne...

Probably the way systemd is thought of and used is mostly as a service manager, and a collection of tools built around the idea of “low level user space”. We rarely think of it as a library that can be used as part of any high level language or application. This talk will cover this aspect of systemd, and through the lens of pystemd, explore how applications can use (and abuse) systemd. Licensed t...

systemd introduced Portable Services support in 2018, as part of v239. This feature was covered at ASG 2018 and in a blog post published at the time: https://0pointer.net/blog/walkthrough-for-portable-services.html But a lot has changed in the past 6 years, and very crucial new features have been introduced, so it is time to have another look at this topic and see what has happened in the meanwhil...

Arch Linux creates 2 cloud images, 2 vagrant images every month using custom bash scripts and requiring root for building. This talk will look at how these images can be created using mkosi, building them in CI, testing the build images and as a bonus; build reproducible? Project link: https://gitlab.archlinux.org/archlinux/arch-boxes Licensed to the public under https://creativecommons.org/licens...

On general purpose image based systems such as Flatcar and Fedora CoreOS, 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 h...

With systemd tooling, including mkosi, it is possible to build an OS image that fulfills all checkmarks a modern image-based OS should have, but with a standard off-the-shelf distribution! This talk gives an overview for a possible workflow, including A/B updates and offline signed images and updates, in real-use. As a bonus, it is also self-replicating and uses as little configuration as possible...

While software bills of materials become of increasing value to further trust in the software supply chain, generating high quality SBOMs still poses some challenges in some ecosystems due to the lack of proper tooling or accessible build metadata. In this talk, I'll explain and demonstrate how we can leverage the static dependency graph of functional package managers like Nix to generate very pre...

An update on systemd's TPM features, i.e. what happened since last year, i.e. systemd-pcrlock, NvPCRs, and Varlink APIs. At last year's ASG I already did a systemd & TPM talk, and this is supposed to be a follow-up to that, with everything that happened since then, plus what's next and what's missing. Licensed to the public under https://creativecommons.org/licenses/by/4.0/de/ about this event: ht...

Containers have become the de facto choice for deploying most applications, and all of us benefit from the isolation, portability, and the surrounding ecosystem. In this talk we’ll take a deep dive into the world of bootable containers, using the same ideas, goals and technology for the host system (whether virtualized or bare metal). We’ll look at the bootc project under the github.com/containers...

At the edge, there's one thing we know for sure: it's not to be trusted. But imagine if Kairos could change that, letting you sleep soundly knowing your intellectual property is secure. Kairos is a fully open source project to run kubernetes at the edge. As such, we have put Trusted Boot into action. Inspired by Lennard Pottering, the mind behind Systemd, we've leveraged Secure Boot, Trusted Boot,...

You may have heard about this weird distribution, NixOS, that breaks compatibility with /usr. This talk explores the properties inherent to NixOS, focusing on its distinct approach to package management and system configuration. Learn how these principles combine with general upstream efforts at bringing TPM2, Secure Boot and more to your Linux distribution. Everything you wanted to know about why...

In this talk we present the story of upgrading systemd in Tizen by eleven releases. We share both the lessons we've learnt during the most recent upgrade as well as decade long experience of the maintenance and development of key packages in the only GNU/Linux distribution that uses kdbus. We describe our day-to-day git workflow as well as upgrade procedures we came up with over the years. License...