Fedora bootc base images

Create and maintain base bootable container images from Fedora packages.

Motivation

The original Docker container model of using "layers" to model applications has been extremely successful. This project aims to apply the same technique for bootable host systems - using standard OCI/Docker containers as a transport and delivery format for base operating system updates.

Building images

The current default user experience is to build layered images on top of the official binary base images produced and tested by this project. See the documentation5 for more info.

If you want total control over the image, you don't need to fork this repository. Instead, you can use the existing container as a "builder" to make new images. For more information, see the documentation6.

Build process

Building the images in this repo can be done with podman build, but note the build process uses a special podman-ecosystem specific mechanism to create fully custom images while inside a Containerfile. You need to enable some privileges as nested containerization is required.

podman build --security-opt=label=disable --cap-add=all \
  --device /dev/fuse -t localhost/fedora-bootc .

See the Containerfile for more details. This builds the default standard image.

Fedora versions

By default, the base images are built for Fedora rawhide. To build against a different Fedora version, you can override the FROM image used to obtain the Fedora repos and dnf variables. E.g.:

podman build --from quay.io/fedora/fedora:41 ...

Content sets/tiers

Documentation above referenced the scratch6 flow, but there is also a minimal-plus that is not exposed as a stable interface, but may be used by other images in Fedora.

• standard: This image is the default, what is published as https://quay.io/repository/fedora/fedora-bootc
• minimal: This content set is more of a convenient centralization point for CI and curation around a package set that is intended as a starting point for a container base image.
• minimal-plus: This content set is intended to be the shared base used by all image-based Fedora variants (IoT, Atomic Desktops, and CoreOS).

standard inherits from minimal-plus and minimal-plus in turn inherit from minimal.

All non-trivial changes to minimal and minimal-plus should be ACKed by at least one stakeholder of each Fedora variant WGs.

Available Tiers + Versions

NOTE: The location and naming of these images is subject to change.

Version	standard	minimal	minimal-plus
Rawhide	quay.io/bootc-devel/fedora-bootc-rawhide-standard	quay.io/bootc-devel/fedora-bootc-rawhide-minimal	quay.io/bootc-devel/fedora-bootc-rawhide-minimal-plus
Fedora 43	quay.io/bootc-devel/fedora-bootc-43-standard	quay.io/bootc-devel/fedora-bootc-43-minimal	quay.io/bootc-devel/fedora-bootc-43-minimal-plus
Fedora 42	quay.io/bootc-devel/fedora-bootc-42-standard	quay.io/bootc-devel/fedora-bootc-42-minimal	quay.io/bootc-devel/fedora-bootc-42-minimal-plus

More information

Documentation: https://docs.fedoraproject.org/en-US/bootc/

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