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feat(embed-rerank): TEI is the fleet embed/rerank engine; esh-ml1 sole backend; retire fv-ml1 seats

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Prime, 2026-09-25: TEI serves embedding + reranking for esh-ml1 and the fleet
from now on; fv-ml1 retires both once esh-ml1 is up.

- stacks/embed-rerank: vLLM -> TEI 1.9.4 (89- Ada build), same ports
  8001/8013, fail-closed truncation (--auto-truncate false; embed
  --max-batch-tokens 32768).
- litellm: qwen3-embedding -> esh-ml1 only (hosted_vllm/, unchanged address);
  reranker -> huggingface/ provider at :8013 (hosted_vllm/ 422s on TEI's
  `texts` body). DB alias reranker-a3-bge-v2-m3 patched to the same target.
- Verified via the gateway against the retiring fv-ml1 seats: embed cosine
  median 0.999927 (n=203); rerank top-1/top-3 29/30.
- stacks/vllm: vllm-embed and vllm-rerank-a3 removed (containers retired on
  fv-ml1, GPU 1 freed ~6.1 GB); reward + coder unchanged.
- Bake-off record moved to docs/pfi/embed-rerank-tei-vs-vllm-bakeoff.md;
  CLAUDE.md gains the TEI convention.
This commit is contained in:
vh
2026-09-25 08:30:53 -07:00
parent 49b4bf0177
commit 7bdac80878
17 changed files with 271 additions and 418 deletions
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stacks/vllm/README.md
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@@ -1,5 +1,11 @@
# vllm
> ⚠ **2026-09-25: embedding + reranking LEFT this stack.** `vllm-embed` and
> `vllm-rerank-a3` were retired; the fleet's embed/rerank now runs on **TEI on
> esh-ml1** (`stacks/embed-rerank`), and TEI is the fleet engine for those from
> now on (Prime). What remains here is `vllm-reward` and `vllm-coder` on fv-ml1.
> The history below predates that.
Multi-service vLLM stack on ana-ml2. Started as Qwen3 embedding + rerank
(replacing the unmaintained Infinity stack); generalized to host any vLLM
model on the box, currently three services: