bootc ecosystem at DevConf.CZ and Flock to Fedora 2026

June was a busy month for the bootc community, with back-to-back conferences in the Czech Republic: Flock to Fedora (June 14-16, Prague) and DevConf.CZ (June 18-19, Brno). Both featured a strong presence of talks covering bootc, image-mode systems, and the broader ecosystem. Here's a roundup of the recordings and resources.

DevConf.CZ 2026

The full DevConf.CZ 2026 schedule (including slides) is available on pretalx. Individual talk recordings are on the DevConf YouTube channel.

Hardening OS Distribution: Verifiable and sealed OS with bootc and composefs (Colin Walters, 35 min) — Covers the shift toward OCI-native OS delivery using bootc and composefs, including a demo of deploying a sealed UKI composefs-backed system on RHEL 10.2. Related to the sealed images blog series here on bootc.dev.

These bootc are made for mailin' (Michael Scherer, 36 min) — A practical walkthrough of combining bootc and Fedora Image Mode with the Stalwart mail server for a low-maintenance, self-hosted email stack running on the cheapest possible VM.

Local package layering on bootc systems with DNF5 (Evan Goode, 26 min) — Explores the challenge of making dnf install work on immutable bootc systems, introducing dnf rebuild, a new DNF5 plugin that reconciles imperative package management with declarative container workflows.

Foreman, Katello and bootable containers (Adam Růžička, 35 min) — How Foreman and Katello enable fleet management across both traditional package-mode and the new image-mode approach, from image building through operational management.

Applying CI/CD Patterns to Image Mode for RHEL (Alessandro Rossi, 27 min) — Practical examples of applying CI/CD practices to Image Mode for RHEL using Tekton, GitHub Actions, GitLab CI, Jenkins, and Ansible Automation Platform.

Flock to Fedora 2026

Flock sessions were recorded as room-level livestreams on the Fedora Project YouTube channel. Individual talk pages on the Flock schedule link to slides and other resources.

The Future of Fedora Atomic: Unifying on Bootc and Shared Infrastructure (Hristo Marinov, BoF, 1h40) — A collaborative session discussing the roadmap for migrating Fedora Atomic deliverables (Silverblue, CoreOS, etc.) to a bootc-based workflow, covering architectural shifts and build infrastructure changes.

Fedora bootc: Building and Operating Image-Based Systems (Gursewak Mangat, 25 min; slides) — A practical introduction to bootc for Fedora contributors, demonstrating how bootc's container-native approach makes it easy to test OS images in CI using standard container tooling (BCVK) before deploying to production.

From Compliance to Containers: Managing Fedora Fleets in the Atomic Era (Adam Baali and Jonathan Billings, 55 min) — Bridging compliance requirements with immutable image-based systems like Silverblue, Kinoite, and bootc, demonstrating transparent tooling for NIST controls.

What's new in Fedora CoreOS in 2026? (Jean-Baptiste Trystram and Joel Capitao, 25 min) — Highlights from the past year of Fedora CoreOS development, including OCI distribution migration, bootc integration progress, and the move to bootc-image-builder.