[rhoai-2.25] fix(ppc64le): openblas-devel for ONNX numpy builds

[jiridanek]

Description

Konflux ppc64le builds of jupyter/runtime datascience fail in onnx-builder when installing ONNX requirements-min.txt: numpy==1.26.0 has no ppc64le wheel on PyPI, so pip builds from sdist and needs BLAS. openblas-builder artifacts are only copied into the final image, not into onnx-builder.

This PR installs openblas-devel via dnf in onnx-builder before pip install -r requirements-min.txt (verified available on UBI 9.6 ppc64le from ubi-9-codeready-builder-rpms).

Depends on / follows #2519 (merged) — pylock-driven ONNX 1.22 + requirements-min.txt. Rebased onto rhoai-2.25 after that merge.

Touches:

• jupyter/datascience/ubi9-python-3.12/Dockerfile.cpu
• jupyter/datascience/ubi9-python-3.12/Dockerfile.konflux.cpu
• runtimes/datascience/ubi9-python-3.12/Dockerfile.cpu
• runtimes/datascience/ubi9-python-3.12/Dockerfile.konflux.cpu

How Has This Been Tested?

• Confirmed on SSH host (podman --platform linux/ppc64le): dnf install -y openblas-devel succeeds on UBI 9.6; pip install numpy==1.26.0 then builds a linux_ppc64le wheel successfully (~15m under qemu).
• Confirmed PyPI has no numpy==1.26.0 ppc64le wheels.
• Await Konflux ppc64le jupyter-datascience + runtime-datascience.

Self checklist:

• Targeted validation before review
• Konflux-specific changes in Dockerfile.konflux.* for rhoai-2.25

Test plan

• Konflux: jupyter-datascience ppc64le onnx-builder passes numpy install
• Konflux: runtime-datascience ppc64le onnx-builder passes numpy install
• amd64 legs still green (openblas-devel only installed on ppc64le path)

Summary by CodeRabbit

• Bug Fixes
  • Improved Power (ppc64le) ONNX-related image builds by installing the required OpenBLAS development libraries.
  • Increased build reliability on ppc64le by ensuring BLAS is available for NumPy source builds during setup.
• Chores
  • Cleaned package-manager metadata before installing Python dependencies to help keep image builds leaner.

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📥 Commits

Reviewing files that changed from the base of the PR and between 2e75603 and bf30be0.

📒 Files selected for processing (4)

• jupyter/datascience/ubi9-python-3.12/Dockerfile.cpu
• jupyter/datascience/ubi9-python-3.12/Dockerfile.konflux.cpu
• runtimes/datascience/ubi9-python-3.12/Dockerfile.cpu
• runtimes/datascience/ubi9-python-3.12/Dockerfile.konflux.cpu

🚧 Files skipped from review as they are similar to previous changes (4)

• runtimes/datascience/ubi9-python-3.12/Dockerfile.konflux.cpu
• jupyter/datascience/ubi9-python-3.12/Dockerfile.konflux.cpu
• runtimes/datascience/ubi9-python-3.12/Dockerfile.cpu
• jupyter/datascience/ubi9-python-3.12/Dockerfile.cpu

---

📝 Walkthrough

Walkthrough

Changes

The four UBI9 Python 3.12 ppc64le ONNX builder stages now install openblas-devel, clean DNF metadata, and document the BLAS requirement before installing Python dependencies.

ONNX ppc64le build prerequisites

Layer / File(s)	Summary
Install OpenBLAS before NumPy build jupyter/datascience/ubi9-python-3.12/Dockerfile.cpu, jupyter/datascience/ubi9-python-3.12/Dockerfile.konflux.cpu, runtimes/datascience/ubi9-python-3.12/Dockerfile.cpu, runtimes/datascience/ubi9-python-3.12/Dockerfile.konflux.cpu	Power-specific onnx-builder stages install openblas-devel and run dnf clean all before installing requirements-min.txt; comments explain the BLAS requirement for NumPy source builds.

Estimated code review effort: 1 (Trivial) | ~3 minutes

Suggested reviewers: daniellutz

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly states the ppc64le/OpenBLAS fix for ONNX NumPy builds and matches the changed Dockerfiles.
Description check	✅ Passed	The description covers the change, motivation, testing, and checklist items, with only minor template completeness gaps.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
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.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/rhoai-2.25-onnx-ppc64le-openblas

Warning

There were issues while running some tools. Please review the errors and either fix the tool's configuration or disable the tool if it's a critical failure.

🔧 Checkov (3.3.8)

jupyter/datascience/ubi9-python-3.12/Dockerfile.cpu

Traceback (most recent call last):
File "/usr/local/bin/checkov", line 2, in
from checkov.main import Checkov
ModuleNotFoundError: No module named 'checkov'

jupyter/datascience/ubi9-python-3.12/Dockerfile.konflux.cpu

Traceback (most recent call last):
File "/usr/local/bin/checkov", line 2, in
from checkov.main import Checkov
ModuleNotFoundError: No module named 'checkov'

runtimes/datascience/ubi9-python-3.12/Dockerfile.cpu

Traceback (most recent call last):
File "/usr/local/bin/checkov", line 2, in
from checkov.main import Checkov
ModuleNotFoundError: No module named 'checkov'

• 1 others

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[jiridanek]

/build-konflux