update os to ubi9 in Dockerfile

[jiaoshuntian]

Checklist:

• Have you added an explanation of what your changes do and why you'd like them to be included?
• Have you updated or added documentation for the change, as applicable?
• Have you tested your changes on all related environments with successful results, as applicable?
  • Have you added automated tests?

Type of Changes:

• New feature
• Bug fix
• Documentation
• Testing enhancement
• Other

What is the current behavior (link to any open issues here)?

What is the new behavior (if this is a feature change)?

• Breaking change (fix or feature that would cause existing functionality to change)

Other Information:

Summary by CodeRabbit

• Chores
  • Updated base operating system image to a newer version for the container build.

_{✏️ Tip: You can customize this high-level summary in your review settings.}

[coderabbitai]

Walkthrough

The Dockerfile base image for the ivory-operator has been updated from Red Hat's UBI 8 micro variant to UBI 9 micro variant. This is a runtime environment upgrade with no changes to build steps or configuration.

Changes

Cohort / File(s)	Change Summary
Base image upgrade build/ivory-operator/Dockerfile	Updated base image from ubi8/ubi-micro to ubi9/ubi-micro

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

• Verify UBI 9 micro image compatibility with the ivory-operator application dependencies

Poem

🐰 From UBI eight to nine we climb,
A rabbit's leap through Docker time!
The micro base now fresh and bright,
Our operator takes new flight! 🚀

Pre-merge checks and finishing touches

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Description check	⚠️ Warning	The description contains only the template structure with all checkboxes and sections empty, providing no substantive information about the changes, rationale, testing, or documentation.	Complete the description template by checking relevant boxes, explaining the change rationale, documenting any breaking changes, and confirming testing has been performed.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately describes the main change: updating the base OS from UBI8 to UBI9 in the Dockerfile.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

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[coderabbitai]

Actionable comments posted: 0

🧹 Nitpick comments (1)

build/ivory-operator/Dockerfile (1)

2-9: Consider enriching the PR description for maintainability.

The PR title and description lack substantive context. For future maintainability, consider including:

• Why UBI9 is needed (e.g., extended support lifecycle, security patches, performance improvements).
• Any compatibility caveats or breaking changes.
• Test results confirming the operator works as expected.

📜 Review details

Configuration used: CodeRabbit UI

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 1346995 and 3fbb1cb.

📒 Files selected for processing (1)

• build/ivory-operator/Dockerfile (1 hunks)

⏰ Context from checks skipped due to timeout of 90000ms. You can increase the timeout in your CodeRabbit configuration to a maximum of 15 minutes (900000ms). (8)

• GitHub Check: kuttl-k3d (v1.21)
• GitHub Check: kuttl-k3d (v1.22)
• GitHub Check: kuttl-k3d (v1.23)
• GitHub Check: kuttl-k3d (v1.24)
• GitHub Check: kubernetes-k3d (v1.28)
• GitHub Check: kuttl-k3d (v1.25)
• GitHub Check: kubernetes-api (1.23.5)
• GitHub Check: kubernetes-k3d (v1.25)

🔇 Additional comments (1)

build/ivory-operator/Dockerfile (1)

1-1: Approve UBI9 base image upgrade—but verify compatibility testing.

The base image upgrade from UBI8 to UBI9 is a necessary maintenance improvement. However, the PR description lacks context about why this change is needed and what testing has been performed.

Please confirm that:

1. The ivory-operator application has been tested and validated to work correctly with UBI9's runtime environment (including any differences in package versions, system libraries, or kernel features).
2. Any CI/CD automated tests have passed against this new base image.

If you'd like, I can help verify compatibility by inspecting dependency declarations or searching for known UBI8↔UBI9 migration guidance.