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Build disk images for Atomic Desktops with image-builder

Summary

We will switch the builds of the Fedora Atomic Desktop ISOs over from lorax to image-builder. Additionally, we will introduce extra artifacts (qcow2, raw image) for those variants where an out-of-the-box setup is available.

Owner


Current status

Detailed Description

Currently the Fedora Atomic Desktops (Silverblue, Kinoite, Sway Atomic, Cosmic Atomic, Budgie Atomic) are built using lorax. We've slowly been reducing our usage of lorax over time; migrating mostly to kiwi for live media and disk images, and image-builder for artifacts that require ostree or bootc-based content.

The Fedora Atomic Installers are boot.iso's with an embedded ostree-commit. These are nearly identical to Fedora IoT installer ISOs which are already produced with image-builder.

For this change proposal we will switch over the pungi configuration for the above listed variants to build their ISOs with image-builder, reducing lorax usage more.

Additionally, since image-builder can produce multiple other types of artifacts out of ostree-commits we will introduce a qcow2 image for Fedora Silverblue and Fedora Kinoite and a raw image for those variants (but only for aarch64) to be used with arm-image-installer for users of single board computers (such as the Raspberry Pi).

We would love to also enable qcow2 and raw images for the other Fedora Atomic Desktop variants but we are blocked on Anaconda's initial-setup not working (upstream issue).

If this gets resolved before Beta Freeze we could potentially also enable the additional artifacts for those.

Feedback

None yet.

Benefit to Fedora

With this change and the additional (unrelated, but in the same area) change to Modernize the boot.iso we will reduce our usage of lorax and simplify our deliverable process to be done by two tools, instead of the current three.

It will also enable (in the future) to migrate the Fedora Atomic Desktops to be bootc-based either in Koji, or potentially in Konflux depending on the timing.

The availability of qcow2 images will make 'testdriving' Fedora Atomic Desktops easier as users can immediately spin up a virtual machine with them. In the same fashion, the availability of raw images will make it more feasible for users to run Fedora Atomic Desktops on their aarch64 single board computers.

Scope

  • Proposal owners:
    • Implement the embedding of flatpaks in image-builder.
    • Implement the Fedora Atomic Desktop installers and disk images.
  • Other developers:
    • Review fedora-pungi pull-requests.
  • Policies and guidelines: N/A (not needed for this Change)
  • Trademark approval: N/A (not needed for this Change)
  • Alignment with the Fedora Strategy:
    • Easier local builds and more artifacts for Fedora Atomic Variants make them more easily available.
    • Alignment with the RHEL and CentOS build processes (which use image-builder).
    • Alignment with bootc-deliverable conversion (which uses image-builder) easies future migrations.

Upgrade/compatibility impact

None.

Early Testing (Optional)

No.

How To Test

Once the relevant pungi changes have been made Fedora Rawhide composes will contain new ISOs. These can be used in the same fashion as current ones; so testing would consist of ensuring that they behave functionally the same after that point.

The new artifacts will also be part of composes after the same point; users could download and try them out :)

User Experience

User experience for Fedora Atomic Desktops will not change. A new user experience will be available (qcow2, raw).

Dependencies

There are no dependencies. The work for this change proposal *does* touch the same areas as the modernization work for the boot.iso and might simplify the implementation of that change proposal but is not a prerequisite.

Contingency Plan

  • Contingency mechanism: Revert pungi configuration changes.
  • Contingency deadline: Beta freeze.
  • Blocks release? No.

Documentation

We will be documenting local builds of Fedora Atomic Desktops in the Fedora Atomic Desktops documentation as part of this change; though likely *after* the contingency point.

Release Notes

N/A

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