docs(rhcos): real RHCOS validation evidence + operator guide#52
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Records a real validation run inside a booted RHEL CoreOS guest and documents the operator path end to end: - docs/evidence-rhcos.md: committed evidence — RHCOS 416.94 (OpenShift 4.16), kernel 5.14.0-427.93.1.el9_4, ringbuf-modern load=pass attach=1/1, with the in-guest validator output, serial excerpt (ignition.platform.id=qemu), and image provenance (public OpenShift mirror, sha256s). Reproduce steps included. - docs/rhcos-openshift.md: operator guide — why it's opt-in, getting the image (public mirror / openshift-install), the RHEL/Alma 9 interim kernel approximation, and limits. - matrices/rhcos.yaml: ready-to-run single-profile matrix (required: false). - README: a careful CoreOS/OpenShift note under the backports section — FCOS Ignition boot implemented + public; RHCOS opt-in, operator-supplied image; example commands; links to the evidence and guide. RHCOS stays OUT of the "Distributions covered" table (no public evergreen image). Raw run artifacts live under evidence/rhcos/ locally (git-ignored as high-churn output); the decisive fields are inlined in docs/evidence-rhcos.md. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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Closes the evidence gap on the RHCOS path. Earlier PRs added the opt-in mechanism (#50 Ignition boot, #51 operator image + opt-in); this proves it with a real run and documents it.
Real run (not a claim)
Downloaded the public RHCOS 4.16.51 qemu image, staged it via
make rhcos-image RHCOS_IMAGE_URL=..., and ran withBPFCOMPAT_ENABLE_RHCOS=1:5.14.0-427.93.1.el9_4-fw_cfg name=opt/com.coreos/config; SSH ascoreringbuf-modernartifact: load=pass, attach=1/1, kernel BTF presentSanity-checked the gate too: without
BPFCOMPAT_ENABLE_RHCOSthe run is correctly refused with the "stage image + opt in" reason.Deliverables
docs/evidence-rhcos.md— committed evidence: result table, in-guest validator JSON, serial excerpt (ignition.platform.id=qemu, "CoreOS Ignition User Config Setup"), image provenance (public mirror + sha256s), reproduce steps.docs/rhcos-openshift.md— operator guide: why opt-in, getting the image (public mirror /openshift-install coreos print-stream-json), the RHEL/Alma 9 interim kernel approximation, limits.matrices/rhcos.yaml— ready-to-run single-profile matrix.Honesty preserved
/evidence/is git-ignored (high-churn local output), so the decisive fields are inlined indocs/evidence-rhcos.md— the committed, reviewable record.🤖 Generated with Claude Code