F44 Change Proposal: KojiServiceImageBuilderRemoval [SystemWide]

Wiki: https://fedoraproject.org/wiki/Changes/KojiServiceImageBuilderRemoval

Discussion Thread: https://discussion.fedoraproject.org/t/165111

**This is a proposed Change for Fedora Linux.**
This document represents a proposed Change. As part of the Changes process, proposals are publicly announced in order to receive community feedback. This proposal will only be implemented if approved by the Fedora Engineering Steering Committee.

== Summary ==

Since Fedora 43 there are two ways to interact with Red Hat Image Builder to build images. Local (on the Koji workers) or through an external service (through the service's infrastructure). This proposal drops the service parts while keeping the Koji-local builds.

== Owner ==

* Name: [[User:supakeen| Simon de vlieger]]
* Email: cmdr@supakeen.com


== Detailed Description ==

Currently two plugins are deployed on Fedora Koji's infrastructure to interact with Red Hat Image Builder. There's `koji-osbuild` and `koji-image-builder`.

`koji-osbuild` tasks create API requests to Red Hat Image Builder's API and the results of these tasks are attached to builds. `koji-image-builder` performs builds directly on Koji workers in the same way as Lorax, or Kiwi do.

In Fedora 43 we transitioned Editions and Spins using `koji-osbuild` to `koji-image-builder`. See [[Changes/KojiLocalImageBuilder]].

With that change proposal implemented no deliverables are produced with the Red Hat Image Builder service, however the team is still maintaining its infrastructure for it (builders that are used to build Fedora artifacts). Since this plugin is no longer in use we'd like to drop it from Fedora's Koji configuration and afterwards to decommission the infrastructure maintained for it.

This means that users no longer have access to the `osbuildImage` task type in Koji; but can migrate to the `imageBuilderBuild` task type.

Current users of `koji-osbuild` have already been migrated to `koji-image-builder` but for completeness the following artifacts are produced by it since Fedora 43:

* ARM SIG's Minimal disk images.
* Fedora IoT disk images.
* Fedora IoT Anaconda ISOs.
* Fedora IoT CoreOS installer ISOs.

Fedora IoT is the last to be building images with `osbuildImage` (for Fedora 42). We'll coordinate with them that these are turned off after Fedora 43 final.

== Feedback ==

None yet.

== Benefit to Fedora ==

The benefit is mostly to the Image Builder team as we can decommission a chunk of our hardware. For Fedora the benefits are: fewer packages and simplified configuration on for Koji and Pungi and less confusion for those maintaining these systems.

Real benefits were mostly part of the previous change where we migrated Fedora off of the service and made the service obsolete. See [[Changes/KojiLocalImageBuilder]].



== Scope ==
* Proposal owners:
** Create PR to remove Fedora 42 builds with `osbuildImage` for Fedora IoT.
** Create PR to remove `osbuildImage` configuration and packages from Koji staging.
** Create PR to remove `osbuildImage` configuration and packages from Koji production.
* Other developers: None.
* Policies and guidelines: N/A (not needed for this Change)
* Trademark approval: N/A
* Alignment with the Fedora Strategy: I don't know.

== Upgrade/compatibility impact ==

Not applicable for this change.


== Early Testing (Optional) ==

Not applicable for this change.

== How To Test ==

Not applicable for this change.

== User Experience ==

Not applicable for this change.

== Contingency Plan ==

There is no contingency plan. Generally we don't build the other releases for which this Koji plugin was used. If we do want to build them they can be built with the Koji local version instead.

== Documentation ==

None.

== Release Notes ==

Nothing will change in the distro itself.