Popping podman/dockers bonnet: Unraveling the image pull process while developing for Forgejo (gpn24)

Popping podman/dockers bonnet: Unraveling the image pull process while developing for Forgejo (gpn24)

Author: CCC media team June 7, 2026 Duration: 17:28
Developing an OCI image pull through cache for Forgejo had some interesting rabbit holes and it was surprisingly hard to get in depth information on a supposedly well known system. So I got to deep dive and do bits of research and reverse engineering to make the parts communicate properly. In this talk I'll share my insights into the process of pulling OCI images according to the distribution spec (and its slight deviations) and try to answer questions like: - Which requests are sent by Podman or the Docker daemon when doing `docker pull image`? - Whats that with the /v2 endpoint and discovery? - How about authentication? - What does the pull sequence look like? - Help, I got an index manifest, what should I do? - How should Forgejo communicate with the daemon for a successful pull? If there is time, I'll also share small pieces of knowledge of where the implementation sits in the Forgejo codebase and how it interacts with the existing package registry. - PR containing the implementation: https://codeberg.org/forgejo/forgejo/pulls/11611 Licensed to the public under https://creativecommons.org/licenses/by/4.0/ about this event: https://cfp.gulas.ch/gpn24/talk/8SDDSH/

Tune into the Chaos Computer Club-recent events feed for a direct line to the forefront of digital culture and critical technology discourse. Curated by the CCC media team, this podcast channels the raw, insightful atmosphere of Europe's most influential hacker association, bringing you recordings from their major gatherings and community events. Each episode is a deep dive into talks and presentations from the last two years, covering topics from cryptography and privacy rights to hardware hacking, societal impacts of surveillance, and open-source philosophy. You'll hear from researchers, activists, and engineers who are actively shaping our digital future, offering perspectives rarely found in mainstream tech conversations. This isn't a produced show with hosts; it's an archival audio stream of genuine conference sessions, complete with audience questions and the spontaneous energy of the live event. For anyone interested in the technical details and ethical debates at the heart of modern technology, this feed serves as an essential, unfiltered resource. Subscribe to this podcast to keep your finger on the pulse of the Chaos Computer Club's ongoing dialogue, where complex ideas are broken down and the tools for a more empowered digital life are openly discussed.
Author: Episodes: 100

Chaos Computer Club - recent events feed
Podcast Episodes
Communication without Borders: Cross-Platform VoIP (gpn24) [not-audio_url] [/not-audio_url]

Duration: 45:20
Recent events, such as Discord's controversial push for personal ID verification, the use of AI models for age-determination and the widespread analysis of user-data , have laid bare a harsh reality: proprietary platform…
forgejo for foss files - die Reise von Github zu Forgejo (gpn24) [not-audio_url] [/not-audio_url]

Duration: 21:51
Github für offene, communitybasierte Projekte? Das hat keine Zukunft, wie sich in den letzten Jahren immer stärker gezeigt hat. Zum Glück gibt es eine Alternative: Forgejo bietet die Möglichkeit, alles nötige für FOSS-So…
systemd, ParticleOS & nspawn (gpn24) [not-audio_url] [/not-audio_url]

Duration: 57:22
ParticleOS kombiniert viele neuere Funktionen von systemd, um ein signiertes, immutables Betriebssystem zu bauen. systemd-nspawn wird mittels unkonventioneller Ansätze um einen unpriviligierten Modus erweitert. ParticleO…
Die drei Klammern [] {} () und die BASH (gpn24) [not-audio_url] [/not-audio_url]

Duration: 59:29
Die Idee kam bei einem Shell-Vortrag von Leyrer anno 2023: es gibt so viele verschiedene Klammer-Typen in der Shell, und so viele verschiedene Einsatzmoeglichkeiten und Bedeutungen. Darueber zu reden, Unterschiede aufzuz…
Wir bauen uns ein Forschungsnetz - BelWü 2026 (gpn24) [not-audio_url] [/not-audio_url]

Duration: 52:52
Wenn ein größeres Netz auf- oder umgebaut wird, kauft man nicht einfach nur ein paar Router und baut die ein. Dieser Vortrag ist ein grober Abriss der letzten 3 Jahre, von der Anforderungsanalyse bis zum Aufbau der erste…