ci: Regenerate the initramfs after installing bootc from copr

[cgwalters-bot]

The CI image installs bootc from copr on top of centos-bootc but keeps the base image's initramfs. Current bootc writes only composefs.digest= in BLS entries, while the bootc 1.16.13 initramfs in centos-bootc:stream10 only starts bootc-root-setup.service with a composefs karg, so the composefs UEFI boot test ends in emergency mode (job). A newer bootc with an older initramfs isn't supported, so this regenerates the initramfs after installing bootc.

Tested on a 16-core RHEL 10 devspace, with the stream10 image built from Dockerfile (copr bootc 202609261137.g83d1589142) and rootless equivalents of the bootc-e2e steps (bcvk to-disk --filesystem ext4 in place of the privileged bootc install to-disk --via-loopback, then the same OVMF QEMU boot as scripts/test-uefi-vm-boot.sh):

• The initramfs unit now has ConditionKernelCommandLine=|composefs.digest (before: only =composefs).
• composefs UEFI boot: reaches login: with this change; on main it fails with "Failed to start initrd-switch-root.service" and enters emergency mode.
• ostree UEFI boot reaches login: with this change.
• tests/tests/bootupctl-status-in-bootc.sh and the build's bootc container lint --fatal-warnings pass.

Not run: the stream9, aarch64 and grubcc=1 (Fedora, Dockerfile.bls, which doesn't use the copr) variants, and the BIOS boot test.

Generated-by: https://github.com/cgwalters/#llms

[openshift-ci]

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[coderabbitai]

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• GitHub Check: testing-farm:fedora-rawhide-x86_64
• GitHub Check: testing-farm:centos-stream-10-x86_64
• GitHub Check: rpm-build:centos-stream-10-x86_64
• GitHub Check: rpm-build:fedora-rawhide-x86_64
• GitHub Check: testing-farm:fedora-rawhide-x86_64
• GitHub Check: testing-farm:centos-stream-10-x86_64
• GitHub Check: rpm-build:fedora-rawhide-x86_64
• GitHub Check: rpm-build:centos-stream-10-x86_64

🔇 Additional comments (1)

Dockerfile (1)

39-39: 🎯 Functional Correctness

The multiple-directory condition remains undecidable. The comment also incorrectly calls Stream 9 and aarch64 untested; .github/workflows/ci.yml:23-38 tests both Stream 9 and Stream 10 on x86_64 and aarch64. Current contents of the moving image tags are unavailable, so the suggested failure cannot be confirmed or rejected.

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📝 Walkthrough

Walkthrough

The Dockerfile now regenerates the initramfs after installing bootc. It selects the kernel version from /usr/lib/modules and runs dracut --force to write that kernel’s initramfs.img.

Changes

Image build

Layer / File(s)	Summary
Regenerate the initramfs Dockerfile	After installing bootc, the build selects a kernel version from /usr/lib/modules and runs dracut --force to replace that kernel’s initramfs.img.

Priority: ➖ Normal

Estimated code review effort: 2 (Simple) | ~10 minutes

Change: Bug fix

Suggested reviewers: rolv-apneseth

Merge Risk: ⚪ Minimal · up to 35948

The initramfs regeneration has no confirmed merge-blocking issue. The untested image variants remain worth checking through normal CI.

🚥 Pre-merge checks | ✅ 4 | ❌ 2

❌ Failed checks (2 warnings)

Check name	Status	Explanation	Resolution
Title check	⚠️ Warning	The title identifies the CI initramfs change and uses the required subsystem prefix, but the description starts with uppercase “Regenerate” instead of lowercase text after the colon.	Change the title to “ci: regenerate the initramfs after installing bootc from copr” with lowercase text after the colon and no trailing period.
Commit Message Convention	⚠️ Warning	The PR has one non-merge commit: ci: Regenerate the initramfs after installing bootc from copr. The subsystem is valid and the description is imperative, but it starts with uppercase R, not a lowe…	Change the subject to ci: regenerate the initramfs after installing bootc from copr.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description check	✅ Passed	The description directly explains the initramfs mismatch, the Dockerfile change, test results, and untested variants.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

Full details: Commit Message Convention

Explanation

The PR has one non-merge commit: ci: Regenerate the initramfs after installing bootc from copr. The subsystem is valid and the description is imperative, but it starts with uppercase R, not a lowercase letter.

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[cgwalters]

/ok-to-test