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feat(ci): use older image as baseline for rechunker#126

Draft
Lumaeris wants to merge 2 commits intozirconium-dev:mainfrom
Lumaeris:pull-older-image
Draft

feat(ci): use older image as baseline for rechunker#126
Lumaeris wants to merge 2 commits intozirconium-dev:mainfrom
Lumaeris:pull-older-image

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@Lumaeris
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This PR pulls an older image to use as baseline for rechunker to do better updates and implements an input for workflow dispatch to clear rechunk history only whenever applicable, similar on how it was done for Legacy Rechunker used in Universal Blue images.

Screenshot From 2026-02-15 16-17-29

Ironically CentOS Bootc image is now used to get newer rpm-ostree package because Fedora repos still contains an older version that causes an failure while composing a new commit in edge cases, see a relevant issue attached to the code.

@renner0e
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renner0e commented Feb 15, 2026

Don't bother with this for now, the current rpm-ostree version which has a new flag which will do exactly this but get all the metadata with skopeo inspect instead and you don't have to pull the entire image for this. It just hasn't made it into fedora yet.

Clearing the rechunker plan like this is a good idea, ideally this would just be automated and would be run automatically once a month or something.

@Lumaeris
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BlueBuild I think already does a cleanup once in a month, that would be a nice addition.

I see what you mean, but looks like new --previous-build flag for build-chunked-oci was merged just after releasing 2026.1 so we have to wait even longer 🙁

@Lumaeris Lumaeris marked this pull request as draft February 17, 2026 15:50
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2 participants