OLS-3235 Make lightspeed-rag-content a multi-arch image#769
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Add arm64 build leg to the own-app-lightspeed-rag-content pipelines to produce a proper OCI manifest list with both amd64 and arm64 variants. This unblocks Konflux multi-arch builds of lightspeed-service which consumes this image. Changes: - Containerfile: add REQUIREMENTS_FILE build arg to support architecture-specific Python dependencies - requirements.arm64.txt: arm64-compatible requirements with aarch64 torch wheel from Red Hat package registry - Pipeline YAMLs: add build-container-arm64 task using FLAVOR=cpu on linux/arm64, enable build-image-index to produce manifest list, prefetch both GPU and arm64 requirements The arm64 variant uses CPU-only PyTorch on ubi9/python-312 (multi-arch) as the builder and produces identical vector DB data. The final image is ubi-minimal with architecture-independent content. Co-authored-by: Cursor <cursoragent@cursor.com>
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The Red Hat torch CPU wheel requires libmpi_cxx.so.40 at runtime (used for distributed tensor operations). On the GPU base image this is pre-installed, but ubi9/python-312 (cpu-base) doesn't have it. Fix by copying the OpenMPI shared libraries from the gpu-base stage (which is already pulled during the build) into the builder stage and updating the dynamic linker cache. Co-authored-by: Cursor <cursoragent@cursor.com>
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Summary
own-app-lightspeed-rag-contentKonflux pipelines to produce a multi-arch OCI manifest list (amd64 + arm64)lightspeed-servicemulti-arch builds which consume this image and were failing with:Base image ... has architecture 'amd64', expected 'arm64'ubi9/python-312and produces identical vector DB contentChanges
ContainerfileREQUIREMENTS_FILEbuild arg for arch-specific depsrequirements.arm64.txt.tekton/own-app-*-push.yamlbuild-container-arm64task, enable image index.tekton/own-app-*-pull-request.yamlDesign
FLAVOR=cpuwithubi9/python-312(multi-arch) as the builder basebuild-image-indexaggregates both arch images into a manifest listubi-minimalbase image digest is already a manifest list with arm64 support (verified)requirements.arm64.txtis identical torequirements.cpu.txtexcept torch points to thelinux_aarch64.whl(hash verified by download)Test plan
lightspeed-servicearm64 build can consume the new multi-arch image referenceReferences
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