LCORE-2860: RHOAI Prow e2e tests fail to start — service pods never become ready

[are-ces]

Summary

Fix two issues preventing RHOAI Prow e2e pipeline from deploying service pods:

1. Image build failure (DockerBuildFailed): oc new-build --image=ubi9/ubi-minimal overrode the containerfile's FROM ubi9/python-312 with ubi-minimal, which lacks dnf. Removed the --image flag so the containerfile's own base image is used.

2. Vector store registration conflict: run.yaml pre-registered the vector store and embedding model under provider_id: faiss, conflicting with the lightspeed-stack enrichment script which registers them under provider_id: byok_e2e-test-docs. Removed the duplicate entries since enrichment handles both.

Type of change

• Refactor
• New feature
• Bug fix
• CVE fix
• Optimization
• Documentation Update
• Configuration Update
• Bump-up service version
• Bump-up dependent library
• Bump-up library or tool used for development (does not change the final image)
• CI configuration change
• Konflux configuration change
• Unit tests improvement
• Integration tests improvement
• End to end tests improvement
• Benchmarks improvement

Tools used to create PR

• Assisted-by: Claude Opus 4.6
• Generated by: N/A

Related Tickets & Documents

• Closes LCORE-2860

Checklist before requesting a review

• I have performed a self-review of my code.
• PR has passed all pre-merge test jobs.
• If it is a core feature, I have added thorough tests.

Testing

1. Triggered RHOAI Prow periodic pipeline — llama-stack image builds successfully with ubi9/python-312 base
2. llama-stack pod starts without vector store registration conflict
3. lightspeed-stack connects to llama-stack successfully
4. Verified RAG query returns results via /v1/query

Summary by CodeRabbit

• Chores
  • Simplified end-to-end test and build setup by removing an unused vector store registration and streamlining the image build configuration.
  • No user-facing functionality changes were introduced.

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Walkthrough

Modifies the RHOAI e2e test configuration to remove an embedding model and FAISS vector store registration, replacing it with an empty vector store list, and removes an explicit base image argument from the pipeline's build step.

Changes

E2E RHOAI Test Config and Pipeline Updates

Layer / File(s)	Summary
Vector store registration removal tests/e2e-prow/rhoai/configs/run.yaml	Removed the all-mpnet-base-v2 embedding model and its FAISS vector store registration (including embedding dimension/model id and vector_store_id), replaced with an empty vector_stores: [].
Build image argument removal tests/e2e-prow/rhoai/pipeline.sh	Removed the explicit --image="registry.access.redhat.com/ubi9/ubi-minimal" argument from the oc new-build invocation, leaving the docker strategy to use default image behavior.

Estimated code review effort: 1 (Trivial) | ~5 minutes

Possibly related PRs

• lightspeed-core/lightspeed-stack#1130: Related e2e pipeline build image change involving container build configuration.
• lightspeed-core/lightspeed-stack#1800: Related change to the llama-stack e2e test container image build environment.

Suggested reviewers: tisnik, radofuchs

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly identifies the e2e startup failure being fixed and matches the changeset's focus.
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.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

✨ Simplify code

• Create PR with simplified code

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[tisnik]

LGTM