HINDSIGHT_API_EMBEDDINGS_PROVIDER=openai pointed at vLLM's
nomic-embed-text-v1.5 (768-dim) crash-looped hindsight-api:
'Cannot change embedding dimension from 384 to 768: memory_units
table contains 1289 rows with embeddings.' Hindsight was never
actually using astro-orbiter for embeddings (defaults to a bundled
local 384-dim sentence-transformers model when the env var is unset)
-- this was a genuine architecture assumption error, not a config
typo. Re-embedding all existing memory data across ~20 agent banks is
a destructive, irreversible operation requiring its own explicit,
approved task -- not something to trigger as a side effect of an
infra migration. Keeps the LLM cutover (astro-orbiter:8000, vLLM
Qwen2.5-32B-Instruct-AWQ) which is safe and already validated.
- vllm.service.j2: branch on role==embedding for --runner pooling
--convert embed, --no-enable-prefix-caching, per-model
trust_remote_code toggle (needed for nomic-embed-text-v1.5's custom
NomicBertModel code), and enforce_eager toggle (needed to avoid CUDA
graph capture OOM when co-resident with another vLLM process on this
24GB card).
- tasks/verify.yml: split completions vs embedding smoke tests --
embedding-mode instances don't serve /v1/completions. Assert a
non-empty embedding vector, not just HTTP 200.
- host_vars/astro-orbiter: enable nomic-embed-text-v1.5 (port 8020),
lower primary model's gpu_memory_utilization 0.95->0.90 + add
enforce_eager after finding 0.95 crash-looped 6-7x before stabilizing
with co-resident nomic-embed (real fix, confirmed via NRestarts=0
after clean stop/start, not luck).
- Hindsight (values.yaml + externalsecret.yaml): cut LLM + embeddings
over to vLLM (:8000, :8020), wire the previously-unset
HINDSIGHT_API_EMBEDDINGS_* env vars for the first time, and swap the
API key secret source from the Nous fallback item to vllm/api-key
(vLLM enforces real auth, llama-swap did not).
- README: document the embedding-mode branch, VRAM findings, and a
genuine architecture gap -- vLLM's one-model-per-process design
cannot replace llama-swap's 5-model LRU roster on this 24GB card, so
21 Hermes profiles' aux-model consumers (Qwen3-8B-no_think,
Phi-3.5-mini, Meta-Llama-3.1-8B, Qwen2.5-Coder-14B) and OpenViking's
VLM stay on llama-swap. Full teardown (t_6dff1ecc) needs a human
decision on the aux-model strategy before it can proceed.
t_d7f8cd65 — astro-orbiter is a single serial llama-swap process; Hindsight's
default LLM_MAX_CONCURRENT=32 burst N parallel retains -> node rejects/times
out extras -> 502. Cap global + retain concurrency to 1 (native semaphore
config, no code change). Raise client timeout 120->600s and ingress
proxy-read/send 300->600s so a single long retain (~90s under load) survives.
stepfun rejects Hindsight tagged fact-extraction (400 'missing tags');
solar-pro4:free is the previously-verified-good Nous model for retain/recall
(t_e3375410 / t_d0dffc3d). base_url + provider unchanged.
Scoped to the hindsight ingress (cosmic-rewind.local.mk-labs.cloud) only.
A slow agentic reflect (~132s on solar-pro4) exceeded the 60s default
proxy-read-timeout, causing nginx to return 504 before the app delivered 200.
Raising read+send to 300s lets the response land. No global configmap change.
Refs t_e3375410.
