Convention on mRock is user-units for ML services (whisper-server,
mvoice-launcher, comfyui as of today). Switching mGPUmanager too:
- systemd/mgpumanager.service: rewritten as a user unit (%h-based
WorkingDirectory + ExecStart, WantedBy=default.target). Drops the
ProtectSystem/ProtectHome hardening that came from the system-unit
template — user units don't need it, and ProtectHome=read-only
blocks a user unit's own working dir.
- Makefile deploy target: rsync to ~/.config/systemd/user/ on the
remote and use systemctl --user, no sudo. README documents the
lingering prerequisite (loginctl enable-linger m).
- config/consumers.yaml: bind on 0.0.0.0:8770 instead of localhost so
mRiver / Tailscale peers can actually reach the broker.
Refs: m/mGPUmanager#1 (deploy task).
Go daemon listening on :8770 that fronts mvoice (8766), whisper-server
(8178), ollama (11434), comfyui (8188) behind a single /v1 façade.
What this MVP does:
- Loads config/consumers.yaml: routing table, per-consumer URL + health +
paths + vram_resident_mib + can_coexist_with + load/unload routes.
- Background health probe (5s) on every consumer; refuses fast with a
structured 503 if the last probe failed (no Felix-Banholzer-style
silent fallback).
- POST /v1/{tts,stt,llm,image} proxies the request body + Content-Type
to the routed consumer's path and streams the response back.
- GET /audio/* proxies to audio_proxy consumer (wa.sh fetches its WAV
this way).
- GET /v1/status exposes live GPU sample (nvidia-smi every 2s),
per-consumer health/loaded/gpu_resident_mib/active/total_requests,
scheduler stats.
- GET /healthz, GET / — broker liveness.
The Scheduler interface is in place but the implementation is
'Passthrough' — every job runs immediately, no lock, no queue. Schritt 4
replaces it with a serialising mutex; Schritt 5 adds VRAM-pressure
eviction. The interface boundary means server.go stays unchanged.
Out of scope here:
- Schritt 3: wa.sh migration (parallel work in mAi).
- Schritt 4: queue + global GPU lock.
- Schritt 5: nvidia-smi-driven LRU eviction.
Tests: config validation (good/bad), proxy forwards body, audio proxy
streams bytes, unhealthy consumer returns 503, /v1/status JSON shape.
Refs: m/mGPUmanager#1
