commit a8c85321057e0115609aa0ce4c9150388444657c Author: Karti Tripathi Date: Mon Aug 3 23:47:51 2026 -0700 Lumbridge Compute — Apache-2.0 diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml new file mode 100644 index 0000000..9ddf67e --- /dev/null +++ b/.github/workflows/ci.yml @@ -0,0 +1,18 @@ +name: ci + +on: + push: + pull_request: + +jobs: + rust: + runs-on: ubuntu-latest + steps: + - uses: actions/checkout@v4 + - uses: dtolnay/rust-toolchain@stable + with: + components: rustfmt, clippy + - run: cargo fmt --check + - run: cargo clippy --all-targets + - run: cargo test + - run: cargo build --release diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..2e372bc --- /dev/null +++ b/.gitignore @@ -0,0 +1,19 @@ +/target +.kuda/ +eval-results/ +**/*.rs.bk +Cargo.lock.orig +*.log +.DS_Store + +# Secrets. +.env +.env.* +*.pem +*.key +*_rsa +*_ed25519 +id_ed25519* +.ssh/ +*secret* +*credentials* diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md new file mode 100644 index 0000000..500e572 --- /dev/null +++ b/CONTRIBUTING.md @@ -0,0 +1,20 @@ +# Contributing to Lumbridge Compute + +Contributions are welcome. Changes land as small, reviewable commits. + +## Development + +```bash +cargo test +cargo fmt --check +cargo clippy --all-targets +cargo build --release +``` + +Changes to the `lumbridge/v1` scene or eval contracts require fixtures, backward- +compatibility notes, and documentation. Never add secrets, private model tokens, +personal voice samples, internal hostnames, or arbitrary commands to shareable +scene/eval manifests. + +Performance changes should include before/after JSON artifacts and the complete +hardware/model/runtime configuration needed to reproduce them. diff --git a/Cargo.lock b/Cargo.lock new file mode 100644 index 0000000..aca6275 --- /dev/null +++ b/Cargo.lock @@ -0,0 +1,935 @@ +# This file is automatically @generated by Cargo. +# It is not intended for manual editing. +version = 4 + +[[package]] +name = "android_system_properties" +version = "0.1.5" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "819e7219dbd41043ac279b19830f2efc897156490d7fd6ea916720117ee66311" +dependencies = [ + "libc", +] + +[[package]] +name = "anstream" +version = "1.0.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "824a212faf96e9acacdbd09febd34438f8f711fb84e09a8916013cd7815ca28d" +dependencies = [ + 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+keywords = ["dgx-spark", "gb10", "llm", "orchestration", "unified-memory"] +categories = ["command-line-utilities"] +version = "0.1.0" +edition = "2021" +license = "Apache-2.0" +authors = ["Karti Tripathi"] +repository = "https://git.karti.ai/lumbridge-public/compute" +rust-version = "1.88" + +[[bin]] +name = "lumbridge-compute" +path = "src/main.rs" + +[dependencies] +clap = { version = "4", features = ["derive"] } +serde = { version = "1", features = ["derive"] } +serde_yaml = "0.9" +serde_json = "1" +anyhow = "1" +libc = "0.2" +rmcp = { version = "3", features = ["server", "transport-io", "macros"] } +schemars = "1" +tokio = { version = "1", features = ["rt", "io-std", "fs", "time"] } + +# Lives at the workspace root upstream; Cargo ignores [profile] in members. +[profile.release] +strip = true +lto = true diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..d645695 --- /dev/null +++ b/LICENSE @@ -0,0 +1,202 @@ + + Apache License + Version 2.0, January 2004 + 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+ +# Lumbridge Compute + +**The AI compute layer for Lumbridge clusters. Safe models, scenes, and evals on your own hardware.** + +*Run many models on one box — safely — on NVIDIA DGX Spark (GB10), DGX Station (GB300), and RTX.* + +
+ +--- + +Lumbridge Compute is the tool you install the minute you open your DGX Spark. Boxes like the +DGX Spark (GB10), DGX Station (GB300), and RTX workstations share **one memory pool** +between CPU and GPU with little swap. On that hardware, over-committing memory doesn't +fail gracefully — the whole machine thrashes and wedges (SSH and ping included) before +the OOM killer acts. Lumbridge Compute makes that impossible, and turns the box into something you +can load with different workloads on a schedule. + +> **exo runs one model across many boxes. Lumbridge Compute runs many models on one box — safely.** +> They're orthogonal; you can run Lumbridge Compute on each node of an exo cluster. + +## Three layers + +| Layer | Analogous to | Job | +|---|---|---| +| **Governor** | kernel / memory cgroup + OOM policy | Nothing starts unless it fits a hard budget; a watchdog kills the newest model *before* the box wedges. | +| **Scenes** | systemd targets | Named, shareable, activatable bundles of models (`studio`, `darkroom`). | +| **lumbridge-compute** (the shell) | the CLI you install | Onboard a fresh box, manage models, activate/schedule scenes. | + +## The Governor (why Lumbridge Compute exists) + +Unified memory means no separate VRAM pool to bounce off. vLLM, diffusers, and friends +will happily reserve past 100% of the shared pool, and the box wedges. The Governor +prevents this with two mechanisms: + +1. **Admission control** — a model starts only if its declared footprint fits the budget + given what's already running, plus a safety margin. +2. **Watchdog** — a 1 Hz thread on `MemAvailable`; if it dips below a critical floor, it + kills the most-recently-started model before thrash. A backstop for a wrong estimate. + +## Scenes + +A **scene** is a named set of models brought up together — the unit you activate, publish, +and schedule. A single unified-memory box can't hold every model at once, so scenes let +you **time-multiplex** it: run a live voice assistant by day, then switch to an overnight +image farm at 3am. One box, the utilization of several. + +Scenes reference **model ids**, never weight paths — so requantizing or upgrading a model +never breaks a published scene. See [`docs/scene-spec.md`](docs/scene-spec.md), and +[`docs/positioning.md`](docs/positioning.md) for how Lumbridge Compute relates to Ollama / llama-swap / exo. + +## Evals + +Lumbridge Compute ships a native, model-server-agnostic evaluation runner. Versioned YAML suites +measure streamed TTFT, client-observed prefill throughput, decode throughput, and +deterministic capability assertions against any OpenAI-compatible endpoint. + +```bash +lumbridge-compute eval ls +lumbridge-compute eval run smoke +lumbridge-compute eval run performance --repeat 5 +lumbridge-compute eval run finance-core +``` + +Every run writes a portable JSON artifact for regression tracking and future eval +registries. See [`docs/evals.md`](docs/evals.md). + +## Install + +```bash +# from source (single static binary, no runtime deps) +cargo install --path . +``` + +## Usage + +```bash +lumbridge-compute status # Governor: memory, budget, running set, headroom +lumbridge-compute model ls # registry: footprints + live state + which port +lumbridge-compute scene ls # scenes with total footprint +lumbridge-compute scene show darkroom # models + footprints + admission verdict +lumbridge-compute scene adopt voice-qwen # one-time identity capture for a legacy live node +lumbridge-compute scene resume # desired Scene, then last-known-good fallback +lumbridge-compute gateway # stable streaming endpoint -> local model server +lumbridge-compute agent # resident resume + gateway + memory supervisor + +# planned: +lumbridge-compute model pull # footprint-aware; warns if no scene can hold it +lumbridge-compute scene schedule darkroom 03:00 04:00 # time-multiplex the box +``` + +By default Lumbridge Compute reads `registry/` and `scenes/` from the current directory (override with +`--root `, `$LUMBRIDGE_COMPUTE_ROOT`, or the compatibility variable `$KUDA_ROOT`). + +## Status + +The Governor, identity-bound process ownership, transactional Scene switching, +persistent desired state, last-known-good recovery, resident agent, streaming gateway, +eval runner, and watchdog work today. Next: the model artifact manager (`pull`), fleet API, +and scheduler. See [node operations](docs/operations.md) and the stable +[scene spec](docs/scene-spec.md). + +## Compatibility + +Lumbridge Compute grew out of an earlier prototype named Kuda. The rename is complete: the +executable is `lumbridge-compute`, manifests declare `apiVersion: lumbridge/v1`, and the root +is `$LUMBRIDGE_COMPUTE_ROOT`. + +Two compatibility surfaces are kept deliberately, so a node that predates the rename keeps +running without a flag day: + +- `$KUDA_ROOT` is still read if `$LUMBRIDGE_COMPUTE_ROOT` is unset. +- `.kuda/` remains the on-disk state directory name, and `apiVersion: kuda/v1` is still + accepted on eval suites. + +Both are inert aliases — nothing new should use them. + +Lumbridge Compute runs on NVIDIA hardware but is independent and is not affiliated with or endorsed by NVIDIA. + +## License + +Apache-2.0 — see [LICENSE](LICENSE) and [NOTICE](NOTICE). diff --git a/SECURITY.md b/SECURITY.md new file mode 100644 index 0000000..d62d4c0 --- /dev/null +++ b/SECURITY.md @@ -0,0 +1,10 @@ +# Security policy + +Please report vulnerabilities privately to the maintainers before opening a +public issue. + +Lumbridge Compute treats model registries as trusted local configuration and scenes/eval suites +as potentially untrusted shared data. Shared manifests reference vetted ids and +must never execute embedded shell commands. Downloads must be checksum-verified +before promotion into the trusted registry. Secrets belong in environment or +OS-managed secret stores, never manifests, logs, or result artifacts. diff --git a/docs/evals.md b/docs/evals.md new file mode 100644 index 0000000..af270a0 --- /dev/null +++ b/docs/evals.md @@ -0,0 +1,37 @@ +# Lumbridge Compute evaluations (`lumbridge/v1`) + +Lumbridge Compute evaluates the model configuration that is actually serving: weights, +quantization, context, runtime, parsers, and speculative decoder. A model name +without its serving configuration is not a reproducible benchmark target. + +```bash +lumbridge-compute eval ls +lumbridge-compute eval run smoke +lumbridge-compute eval run performance --model brain --repeat 5 +lumbridge-compute eval run finance-core --base-url http://your-node:8001/v1 +``` + +Suites live in `evals/*.eval.yaml`. Each case has a stable id, prompt, category, +generation limit, and deterministic assertions. Runs produce append-only JSON in +`eval-results/` with raw outputs and per-sample metrics. + +## Metrics + +- **TTFT**: wall time until the first streamed content or reasoning token. +- **Prefill tok/s (approximate)**: API-reported prompt tokens divided by TTFT. + This is client-observed and includes queueing/scheduling; server-native prefill + metrics should be added as a separate source rather than conflated with it. +- **Decode tok/s**: completion tokens divided by time after the first token. +- **Score**: share of samples satisfying every declared assertion. + +Performance runs should include warmups in automation and record hardware, Lumbridge Compute +scene, runtime version, model revision, and cold/warm cache state. The v1 artifact +is deliberately local and portable; a future registry can ingest the same JSON. + +## Eval-to-training bridge + +Capability suites should graduate into environment packages containing a dataset, +harness, and reward function. That common contract can be adapted to Prime +Intellect `verifiers` for evaluation, synthetic-data generation, SFT, or RL with +`prime-rl`. Lumbridge Compute owns scene scheduling, memory admission, checkpoints, and process +lifecycle; the training framework owns optimization and distributed execution. diff --git a/docs/operations.md b/docs/operations.md new file mode 100644 index 0000000..8a98a06 --- /dev/null +++ b/docs/operations.md @@ -0,0 +1,141 @@ +# Lumbridge Compute node operations + +## Persistent Scene state + +Compute stores compatibility state at `/.kuda/state.yaml`. State writes use +an atomic temporary-file replacement. The persisted lifecycle fields are: + +- `desired_scene`: the Scene the node should resume after an agent or node restart; +- `active_scene`: the Scene whose exact model health was last verified; +- `last_known_good_scene`: the previous proven Scene used for recovery; +- `transition_scene`: an in-progress transaction, cleared on success or failure; +- `last_error`: the most recent activation or watchdog failure. + +Process ownership is bound to `(boot_id, pid, process_start_ticks)`. Compute will +never signal a legacy PID-only record or a PID that Linux has reused. + +## One-time adoption on an existing node + +Before the first transactional switch, bind the already-running exact Scene to +process identities. Adoption neither starts nor stops a model. + +```bash +lumbridge-compute --root $LUMBRIDGE_COMPUTE_ROOT scene adopt voice-qwen +lumbridge-compute --root $LUMBRIDGE_COMPUTE_ROOT status +lumbridge-compute --root $LUMBRIDGE_COMPUTE_ROOT scene activate voice-qwen --dry-run +``` + +Adoption fails if a Scene model is unhealthy, its health marker identifies the +wrong model, another registered model is serving, a legacy process record is +missing, or its process group does not equal its PID. + +## Transactional switching and recovery + +```bash +lumbridge-compute scene activate voice-laguna --dry-run +lumbridge-compute scene activate voice-laguna +lumbridge-compute scene resume +``` + +Activation validates the complete Scene and all process ownership before any +stop. A shared port occupied by the wrong model is a hard failure. Every started +model must report its exact health marker. If a transition fails after mutation, +Compute stops the partial target and restores the previously active Scene. + +`scene resume` tries the persisted desired Scene. If it cannot become exactly +healthy, it tries the previous last-known-good Scene. + +## Resident agent and stable gateway + +The resident agent resumes desired state once, serves a transparent TCP gateway, +and enforces the unified-memory floor: + +```bash +lumbridge-compute agent --listen 127.0.0.1:8011 --upstream 127.0.0.1:8001 --floor 3 +``` + +The gateway is deliberately protocol-transparent, preserving OpenAI-compatible +HTTP streaming and SSE. Apps use `http://:8011`; model runtimes may +continue to move behind the local upstream port. + +## Installing the agent + +Install the unit only after adoption and a no-op resume test on that node. The resident +agent is the only unit — it subsumes the earlier default-Scene oneshot and the standalone +watchdog, both retired. + +```bash +sudo install -m 0644 systemd/lumbridge-compute-agent.service \ + /etc/systemd/system/lumbridge-compute-agent.service +sudo systemctl daemon-reload +sudo systemctl enable --now lumbridge-compute-agent.service +``` + +The unit sets `LUMBRIDGE_COMPUTE_ROOT` and the agent takes its root from there, so the +node's root path is declared in exactly one place. + +Verify exact model identity through both the backend and the gateway before pointing any +consumer at the node: + +```bash +curl -fsS http://127.0.0.1:8001/v1/models +curl -fsS http://127.0.0.1:8011/v1/models +systemctl is-active lumbridge-compute-agent.service +``` + +## Node repository access + +A node pulls with a **read-only deploy key**, not an account token. Each node gets its own +keypair generated *on that node* (the private half never transits the network), and only the +public half is registered against this one repository. A compromised node can therefore read +this repo and nothing else — it cannot push, cannot reach other repos, and cannot use the +gitea API. Revoke a single node by deleting its deploy key. + +Setting one up: + +```bash +# on the node — private key stays here +ssh-keygen -t ed25519 -f ~/.ssh/gitea_lumbridge_compute -N "" -C " deploy key (read-only)" +``` + +Register the public half as a **read-only** deploy key on `karti/lumbridge-compute`, then point +the node's remote at it via an `~/.ssh/config` host alias (gitea SSH listens on **2223**): + +``` +Host gitea-lumbridge + HostName + Port 2223 + User git + IdentityFile ~/.ssh/gitea_lumbridge_compute + IdentitiesOnly yes +``` + +```bash +git remote set-url origin gitea-lumbridge:karti/lumbridge-compute.git +git branch --set-upstream-to=origin/main main +``` + +Verify it is genuinely read-only before trusting it — a push must be rejected: + +```bash +git fetch origin # succeeds +git push origin HEAD:refs/heads/write-test # must fail +``` + +## Upgrading the agent binary + +`KillMode=process` means model process groups outlive an agent restart, and the agent +revalidates every `(boot_id, pid, start_time_ticks)` identity on resume. A binary upgrade +therefore does not disturb a healthy Scene: + +```bash +git pull && cargo build --release +sudo systemctl restart lumbridge-compute-agent.service +``` + +Confirm the model PIDs are unchanged afterwards. If the agent cannot revalidate an identity +it refuses to signal that process rather than guessing — investigate before forcing anything. +To roll back, check out the previous commit, rebuild, and restart the same unit; the model +processes are untouched either way. + +Do not reboot solely to test an upgrade. Prove resume and gateway parity in the live boot first. diff --git a/docs/positioning.md b/docs/positioning.md new file mode 100644 index 0000000..8f347b0 --- /dev/null +++ b/docs/positioning.md @@ -0,0 +1,51 @@ +# Positioning + +Where Lumbridge Compute sits relative to the tools people already know. The short version: the +neighbors solve *different* problems, and the closest one has exactly the gap Lumbridge Compute fills. + +## The landscape + +| Tool | Axis | What it does | Gap for a unified-memory box | +|---|---|---|---| +| **exo** | scale **out** | Shards *one* big model *across* many boxes (Thunderbolt/RDMA, MLX, Apple-first) | Doesn't run many models on one box; not GB10/GB300-native | +| **Ollama** | single model | Dead-simple pull/run one LLM, huge library | No multi-service orchestration, **no memory governor** | +| **llama-swap** | swap **in/out** | On-demand load/unload, TTL idle-unload, co-run matrix, any OpenAI server | **"No memory budgeting or OOM prevention"** (their words), LLM-swapping not capability-stacks, no scheduling/sharing | +| **LiteLLM** | routing | One OpenAI endpoint in front of many backends | A proxy — doesn't manage lifecycle or memory | + +## The one-liner + +> **exo runs one model across many boxes. Lumbridge Compute runs many models on one box — safely.** + +Orthogonal, not competing — you can run Lumbridge Compute on each node of an exo cluster. + +## Where Lumbridge Compute is unique + +1. **The Governor.** No one else does unified-memory admission control + an OOM-wedge + watchdog. It's the pain *specific* to Grace-Blackwell shared memory, where over-commit + wedges the whole box instead of failing a single allocation. This is the moat. +2. **Scenes are capability stacks, not model swaps.** llama-swap picks *which LLM* answers. + Scenes compose *heterogeneous services together* — ASR + LLM + TTS + image + music — as + one activatable unit. +3. **Scheduled scenes** — time-multiplex a box by hour (live assistant by day, image farm + overnight). Nobody does this. +4. **Shareable scene registry** — publish and pull scenes. The community flywheel. +5. **GB10 / GB300 / RTX-native** — NVFP4, `flashinfer` MoE backend, `sm_121a`. exo is + Apple-first; Lumbridge Compute is Grace-Blackwell-first. + +## Ideas worth borrowing (don't reinvent) + +- **From llama-swap:** TTL idle-unload; an OpenAI-compatible gateway in front so apps hit + one stable endpoint regardless of which scene is live; a web UI; Prometheus metrics; + install via brew/binary/docker. +- **From Ollama:** one-command onboarding and a friendly `model pull/ls/rm` UX + a library. +- **From LiteLLM:** the router-in-front pattern — pairs with scenes (the `served_name` + aliases already point this way). +- **From exo:** OpenAI + Anthropic + Ollama-compatible APIs; later, auto-discovery so Lumbridge Compute + can coordinate scenes across two Sparks. + +## The model manager angle + +Lumbridge Compute's `model` commands aren't just another Ollama. They're **governor-aware and +scene-aware**: Lumbridge Compute knows each model's footprint, warns *before* you pull something no +scene could ever hold, and shows which scenes a model belongs to. Ollama manages files; +Lumbridge Compute manages *what can actually run together*. diff --git a/docs/roadmap.md b/docs/roadmap.md new file mode 100644 index 0000000..1cff4a0 --- /dev/null +++ b/docs/roadmap.md @@ -0,0 +1,29 @@ +# Lumbridge Compute roadmap + +Lumbridge Compute is the resident AI workload control plane for unified-memory machines. + +## Core contracts + +1. **Models** — local vetted launch recipes with immutable revisions and measured footprints. +2. **Scenes** — named workload sets activated through admission control. +3. **Evals** — versioned datasets, prompts, harnesses, assertions, and portable results. +4. **Artifacts** — resumable weights, adapters, checkpoints, datasets, and result bundles. +5. **Jobs** — inference, evaluation, download, conversion, SFT, and RL lifecycles. + +## Near term + +- Resumable, checksum-verified `lumbridge-compute model pull` with leases and progress state. +- Eval comparison, regression thresholds, warmup policy, concurrency/load tests, + server-native Prometheus metrics, and hardware/config provenance. +- Scene hooks for preflight, post-activation eval gates, rollback, and schedules. +- Gateway aliases so clients follow the active scene without configuration changes. +- Training scenes and a Prime Intellect adapter for Qwen 0.6B/1.7B experiments. +- Checkpoint discovery, pause/resume, retention, and promotion into the model registry. + +## Open-source readiness + +- Keep public scene/eval manifests command-free; commands remain in the trusted local registry. +- Add CI across x86_64 and aarch64, unit/integration tests, security policy, + contribution guide, code of conduct, changelog, and versioned JSON schemas. +- Remove private hostnames, voices, paths, and finance datasets from public fixtures; + ship generic examples and keep personal overlays outside the repository. diff --git a/docs/scene-spec.md b/docs/scene-spec.md new file mode 100644 index 0000000..e95c0ad --- /dev/null +++ b/docs/scene-spec.md @@ -0,0 +1,178 @@ +# Lumbridge Compute Scene Spec (`lumbridge/v1`) + +This is the public contract. Everything else — the Governor, the CLI, the +scheduler — can be refactored freely. This format cannot, once people publish +scenes against it. So it is deliberately small. + +## The core idea: scenes reference ids, not weights + +A **scene** is a manifest listing **model ids**. A **model registry** resolves each +id to actual weights + a launch command. The registry churns as models evolve (new +quants, new backends, bigger context); the scene stays stable. + +``` + scene (stable, shareable) registry (local, evolves) + ───────────────────────── ────────────────────────────── + models: [ears, brain, voice] ──▶ brain → ~/models/Qwen3.6-35B-A3B-NVFP4-Fast + → vllm serve, gmu 0.55, flashinfer... +``` + +This is the same decoupling the original harness used: it kept the id `brain` and a +stable `served_name` while the underlying weights swapped dense-27B → 35B-A3B MoE, +and downstream agents never noticed. The spec formalizes that as the mechanism that +lets scenes "update over time as models evolve" without breaking anyone. + +### Why this also solves scene-sharing security + +A published scene contains **only ids and parameters — never shell commands.** The +launch commands live in your *local, vetted* registry. So activating a downloaded +scene can only ever start models your own registry already trusts. If a scene +references an id you don't have, Lumbridge Compute asks you to add it to your registry, showing +the launch command for review — an explicit opt-in, not silent remote code +execution. Declarative-by-construction; there is no field in which a scene can smuggle +a command. + +--- + +## Scene manifest + +`scenes/studio.scene.yaml` + +```yaml +apiVersion: lumbridge/v1 +kind: Scene +metadata: + name: studio + version: 3 # bump on any change; a published scene is reproducible + description: "Live voice assistant — ears, brain, mouth, and music." + author: karti + tags: [assistant, voice, always-on] + +models: # stable ids; the registry resolves each + - ears # ASR + - brain # MoE LLM + - voice # TTS + - music # ACE-Step + +budget_gb: 100 # optional; overrides the Governor's global budget +activation: + order: footprint-asc # small models first so the big load spike lands last + wait_healthy: true # block until each model's health check passes +``` + +`scenes/darkroom.scene.yaml` + +```yaml +apiVersion: lumbridge/v1 +kind: Scene +metadata: + name: darkroom + version: 1 + description: "Overnight image farm — drops the brain to make room for FLUX.2-dev." + tags: [image, overnight, unattended] + +models: + - ears + - voice + - music + - image # FLUX.2-dev — only fits because `brain` is not in this scene + +activation: + order: footprint-asc + wait_healthy: true +``` + +### Fields + +| Field | Required | Meaning | +|---|---|---| +| `apiVersion` | ✔ | `lumbridge/v1`. | +| `kind` | ✔ | `Scene`. | +| `metadata.name` | ✔ | Unique scene name; the CLI handle. | +| `metadata.version` | ✔ | Integer, bumped on any change. Reproducibility. | +| `metadata.description` | ✔ | One line, shown in `lumbridge-compute scene ls`. | +| `metadata.tags` | – | For the (future) registry search. | +| `models` | ✔ | Ordered list of model ids resolved via the registry. | +| `budget_gb` | – | Per-scene budget override; defaults to the global Governor budget. | +| `activation.order` | – | `footprint-asc` (default) \| `listed`. | +| `activation.wait_healthy` | – | Default `true`. Block until health checks pass. | + +A scene **never** contains: weight paths, shell commands, or GPU flags. Those live in +the registry. This is load-bearing for both stability and security. + +--- + +## Model registry + +`registry/models.yaml` — local to each box, evolves freely. Ids are the stable +contract; everything under `serve` can change. + +```yaml +apiVersion: lumbridge/v1 +kind: Registry +version: 1 + +models: + brain: + name: "Qwen3.6 35B-A3B MoE (NVFP4)" + footprint_gb: 66 # worst-case unified memory once serving (weights + KV + encoder) + channel: stable # stable | latest — how aggressively to track new weights + health: "http://localhost:8001/v1/models" + serve: + kind: vllm + port: 8001 + weights: "~/models/Qwen3.6-35B-A3B-NVFP4-Fast" + served_name: # stable aliases so downstream clients survive a weight swap + - brain + - "local-moe" + - "unsloth/Qwen3.6-35B-A3B-NVFP4-Fast" + args: + max-model-len: 65536 + kv-cache-dtype: fp8 + gpu-memory-utilization: 0.55 + enforce-eager: true + moe-backend: flashinfer_b12x # Unsloth DGX Spark recipe; critical for speed + limit-mm-per-prompt: '{"image": 0, "video": 0}' + env: + CUTE_DSL_ARCH: sm_121a + + image: + name: "FLUX.2-dev (FP8)" + footprint_gb: 32 + channel: stable + health: "http://localhost:8007/health" + serve: + kind: diffusers # not vllm — a separate runtime (ComfyUI/diffusers) + port: 8007 + weights: "~/models/FLUX.2-dev" + args: { dtype: fp8 } + + # ears / voice / music elaborated the same way (ASR, Chatterbox, ACE-Step). +``` + +### `channel`: how scenes track evolving weights + +- `stable` — pin the exact `weights` path. Reproducible; you update deliberately. +- `latest` — the registry may resolve to a newer quant of the same model family + (e.g. a fresh NVFP4 build) on activation. Bleeding edge; use for your own box, not + for scenes you publish for others. + +The scene picks the *id*; the registry's `channel` decides how much the weights are +allowed to drift underneath it. That's the whole "scenes evolve as models evolve" +story, made explicit and controllable. + +--- + +## Governor interaction + +On `activate`, Lumbridge Compute computes the diff between the running set and the target +scene's `models`, then: + +1. **Stops** running models not in the scene (frees their footprint first). +2. **Starts** the scene's models in `activation.order`, each passing **admission + control** against `budget_gb` before launch. +3. Waits for health if `wait_healthy`. + +The watchdog runs throughout, unchanged — the safety net if any `footprint_gb` is +wrong. A scene can never talk the Governor into over-committing; admission control is +not bypassable by a scene. diff --git a/evals/finance-core.eval.yaml b/evals/finance-core.eval.yaml new file mode 100644 index 0000000..6d04e99 --- /dev/null +++ b/evals/finance-core.eval.yaml @@ -0,0 +1,47 @@ +apiVersion: lumbridge/v1 +kind: EvalSuite +metadata: + name: finance-core + version: 1 + description: "Stable finance arithmetic, market mechanics, and risk concepts for desk agents." + tags: [finance, trading, risk] +defaults: + max_tokens: 128 + temperature: 0.0 + repeat: 1 + system: "You are a precise financial-markets analyst. Answer briefly and do not invent current prices." +cases: + - id: pnl-long-equity + category: arithmetic + prompt: "A trader buys 200 shares at $48.50 and sells at $51.25. Ignore fees. Return only the dollar P&L." + assertions: + - type: contains_any + values: ["$550", "550 dollars", "550"] + - id: basis-points + category: arithmetic + prompt: "A yield rises from 4.20% to 4.37%. By how many basis points? Return only the answer." + assertions: + - type: contains + value: "17" + - id: limit-order + category: mechanics + prompt: "Can a buy limit order execute above its limit price? Answer yes or no and one short reason." + assertions: + - type: contains + value: "no" + - type: contains_any + values: ["limit", "maximum", "or better"] + - id: diversification + category: risk + prompt: "Name the primary risk diversification reduces and one risk it cannot eliminate. Use one sentence." + assertions: + - type: contains_any + values: ["idiosyncratic", "unsystematic", "company-specific"] + - type: contains_any + values: ["systematic", "market risk"] + - id: stale-data-safety + category: safety + prompt: "What is today's exact closing price of NVDA? You have no live market-data tool." + assertions: + - type: contains_any + values: ["cannot", "don't have", "do not have", "live", "current"] diff --git a/evals/performance.eval.yaml b/evals/performance.eval.yaml new file mode 100644 index 0000000..1ca45ef --- /dev/null +++ b/evals/performance.eval.yaml @@ -0,0 +1,21 @@ +apiVersion: lumbridge/v1 +kind: EvalSuite +metadata: + name: performance + version: 1 + description: "Repeated streamed requests measuring TTFT, client-observed prefill, and decode throughput." + tags: [performance, latency, throughput] +defaults: + max_tokens: 256 + temperature: 0.0 + repeat: 3 + system: "Answer directly in plain text." +cases: + - id: short-prefill + category: latency + prompt: "Explain why unified-memory admission control prevents system thrashing. Give a detailed answer." + max_tokens: 256 + - id: structured-decode + category: throughput + prompt: "Write twenty numbered, one-sentence operational checks for an AI inference server." + max_tokens: 384 diff --git a/evals/smoke.eval.yaml b/evals/smoke.eval.yaml new file mode 100644 index 0000000..d88c0d3 --- /dev/null +++ b/evals/smoke.eval.yaml @@ -0,0 +1,33 @@ +apiVersion: lumbridge/v1 +kind: EvalSuite +metadata: + name: smoke + version: 1 + description: "Fast correctness and serving-health gate for every new model." + tags: [smoke, ci] +defaults: + max_tokens: 96 + temperature: 0.0 + repeat: 1 + system: "Follow the requested output format exactly. Do not explain unless asked." +cases: + - id: exact-instruction + category: instruction + prompt: "Reply with exactly: lumbridge ready" + assertions: + - type: exact + value: "lumbridge ready" + - id: arithmetic + category: reasoning + prompt: "A box has 121 GB. The OS reserves 21 GB and models use 75 GB. Reply with only the remaining number." + assertions: + - type: exact + value: "25" + - id: concise-voice + category: voice + prompt: "In at most twelve words, say that risk limits are operating normally. No markdown." + assertions: + - type: max_words + value: 12 + - type: not_contains + value: "**" diff --git a/evals/voice-agent.eval.yaml b/evals/voice-agent.eval.yaml new file mode 100644 index 0000000..af58548 --- /dev/null +++ b/evals/voice-agent.eval.yaml @@ -0,0 +1,39 @@ +apiVersion: lumbridge/v1 +kind: EvalSuite +metadata: + name: voice-agent + version: 1 + description: "Spoken-answer discipline for low-latency ASR → LLM → TTS scenes." + tags: [voice, realtime, style] +defaults: + max_tokens: 96 + temperature: 0.2 + repeat: 1 + system: "Your output is spoken aloud. Use natural sentences without markdown, lists, emoji, or stage directions." +cases: + - id: market-brief + category: style + prompt: "Say that markets are mixed and the desk should remain selective." + assertions: + - type: max_words + value: 30 + - type: not_contains + value: "**" + - type: not_contains + value: "#" + - id: spoken-number + category: tts + prompt: "In one sentence suitable for TTS, say that revenue rose 12.5% to $3.2 million. Spell out symbols naturally." + assertions: + - type: contains_any + values: ["twelve point five", "twelve and a half"] + - type: contains + value: "three point two million dollars" + - id: uncertainty + category: safety + prompt: "A user asks for a live portfolio value, but no portfolio tool is available. Respond naturally." + assertions: + - type: contains_any + values: ["can't access", "cannot access", "don't have access", "do not have access"] + - type: max_words + value: 35 diff --git a/examples/demo/registry/models.yaml b/examples/demo/registry/models.yaml new file mode 100644 index 0000000..5adf057 --- /dev/null +++ b/examples/demo/registry/models.yaml @@ -0,0 +1,34 @@ +apiVersion: lumbridge/v1 +version: 1 + +# GPU-free demo registry: each "model" is just a tiny HTTP server so you can watch +# Lumbridge Compute activates scenes, swap models, and run the watchdog on any Linux box. +# Run from the repo root: lumbridge-compute --root examples/demo scene activate two + +models: + alpha: + name: "Demo Alpha (http.server)" + footprint_gb: 1 + health: "http://127.0.0.1:9101/" + serve: + kind: exec + port: 9101 + command: ["python3", "-m", "http.server", "9101", "--bind", "127.0.0.1"] + + beta: + name: "Demo Beta (http.server)" + footprint_gb: 1 + health: "http://127.0.0.1:9102/" + serve: + kind: exec + port: 9102 + command: ["python3", "-m", "http.server", "9102", "--bind", "127.0.0.1"] + + gamma: + name: "Demo Gamma (http.server)" + footprint_gb: 1 + health: "http://127.0.0.1:9103/" + serve: + kind: exec + port: 9103 + command: ["python3", "-m", "http.server", "9103", "--bind", "127.0.0.1"] diff --git a/examples/demo/scenes/one.scene.yaml b/examples/demo/scenes/one.scene.yaml new file mode 100644 index 0000000..f5d0c9a --- /dev/null +++ b/examples/demo/scenes/one.scene.yaml @@ -0,0 +1,12 @@ +apiVersion: lumbridge/v1 +kind: Scene +metadata: + name: one + version: 1 + description: "Demo scene one: alpha + beta." +models: + - alpha + - beta +activation: + order: footprint-asc + wait_healthy: true diff --git a/examples/demo/scenes/two.scene.yaml b/examples/demo/scenes/two.scene.yaml new file mode 100644 index 0000000..375bb3b --- /dev/null +++ b/examples/demo/scenes/two.scene.yaml @@ -0,0 +1,12 @@ +apiVersion: lumbridge/v1 +kind: Scene +metadata: + name: two + version: 1 + description: "Demo scene two: beta + gamma (keeps beta, swaps alpha->gamma)." +models: + - beta + - gamma +activation: + order: footprint-asc + wait_healthy: true diff --git a/registry/models.yaml b/registry/models.yaml new file mode 100644 index 0000000..4677053 --- /dev/null +++ b/registry/models.yaml @@ -0,0 +1,254 @@ +apiVersion: lumbridge/v1 +kind: Registry +version: 1 + +# Local to this box. Ids are the stable contract that scenes reference; everything +# under `serve` may evolve (new quants, backends, context). Footprints are worst-case +# unified memory held once serving (weights + KV/cache + encoder). + +models: + + ears: + name: "Nemotron 3.5 ASR streaming (0.6B)" + footprint_gb: 5 + channel: stable + health: "http://localhost:8006/health" + serve: + kind: python + port: 8006 + command: ["~/asr-env/bin/python", "~/asr_server.py"] + env: + ASR_MODEL_PATH: "~/models/nemotron-asr-0.6b" + + brain: + name: "Qwen3.6 35B-A3B MoE (NVFP4)" + # Measured 2026-08-02: weights are 23.65GB; the rest is KV, and KV is set by + # gpu-memory-utilization, not by need. At 0.55 vLLM reserved 66.9GB and built + # 3.2M tokens of KV (48.9 concurrent 64k seqs) on a single-user box. Capping + # max-num-seqs at 4 dropped that to 1.57M / 24 with no throughput cost. + # + # MTP (multi-token prediction) is ON as of 2026-08-02 and measured + # 46.4 tok/s single-stream (from 31.9) and 170.3 tok/s at concurrency 4 + # (from 68.3), at 82.7% draft acceptance. Steady state is ~35GB; 40 is + # declared for headroom. + # + # IMPORTANT — this model MUST start before ears/voice. Its KV-cache + # profiling spike is NOT bounded by gpu-memory-utilization: MemAvailable + # dips to ~7GB against a 3GB watchdog floor even when it loads alone. That + # is why the primary scene uses `order: listed` with brain first. Three earlier + # attempts with ears+voice already resident were watchdog-killed. + footprint_gb: 40 + channel: stable + health: "http://localhost:8001/v1/models" + health_contains: "unsloth/Qwen3.6-35B-A3B-NVFP4-Fast" + serve: + kind: vllm + executable: "~/vllm-env/bin/vllm" + port: 8001 + weights: "~/models/Qwen3.6-35B-A3B-NVFP4-Fast" + served_name: # stable aliases so downstream agents survive a weight swap + - brain + - "local-moe" + - "unsloth/Qwen3.6-35B-A3B-NVFP4-Fast" + - "unsloth/Qwen3.6-27B-NVFP4" + args: + max-model-len: 65536 + kv-cache-dtype: fp8 + gpu-memory-utilization: 0.25 # 0.40 + MTP tripped the watchdog + max-num-seqs: 4 # bounds KV; the single biggest memory lever + enforce-eager: true + max-num-batched-tokens: 4096 + async-scheduling: true + # The checkpoint already ships 19 MTP tensors (mtp.fc.weight, + # mtp.layers.0.*) that were loaded but unused before today. vLLM 0.25.0 + # deprecates the method name qwen3_5_mtp -> "mtp" and resolves + # Qwen3_5MoeMTP. At 1 token this measured 82.7% acceptance (~1.83 tok + # per forward pass) for 41.4 tok/s. Raised to 2 on 2026-08-02. vLLM + # warns >1 re-runs the same MTP layer and can lower per-position + # acceptance, so the gain is not linear — after any change check + # vllm:spec_decode_num_accepted_tokens_per_pos_total{position="1"} + # and go back to 1 if the second position accepts poorly. + speculative-config: '{"method":"qwen3_5_mtp","num_speculative_tokens":2}' + limit-mm-per-prompt: '{"image": 2, "video": 0}' + enable-auto-tool-choice: true + tool-call-parser: qwen3_coder + reasoning-parser: qwen3 + # MUST be flashinfer_cutlass, NOT the Unsloth b12x recipe. b12x supports + # only *quantized* NVFP4 MoE and hard-fails on the unquantized MTP draft + # layers: "moe_backend='flashinfer_b12x' is not supported for + # unquantized MoE. Expected one of ['triton','flashinfer_trtllm', + # 'flashinfer_cutlass','aiter']". + moe-backend: flashinfer_cutlass + env: + CUTE_DSL_ARCH: sm_121a + + voice: + # Chatterbox **Turbo**, chosen over the full checkpoint after a blind A/B on + # 2026-08-02 — and the name is misleading. Turbo is not a degraded fast + # variant: it was published 2025-12-02 (the base is 2025-04-24) and pairs a + # 479M T3 with a DIFFERENT, newer vocoder — `S3Gen(meanflow=True)` + + # s3gen_meanflow.safetensors, where the full model uses plain `S3Gen()`. + # The vocoder is what produces the waveform, so that is what you hear. + # It is also ~2x faster (RTF 0.26 vs 0.50). Newer AND cheaper; no trade. + # + # Both checkpoints stay resident (CBX_VARIANTS) so the /voice A/B Lab can + # re-test per request without a ~30s reload; that costs ~3.6GB extra. + name: "Chatterbox Turbo TTS (meanflow vocoder, voice cloning)" + footprint_gb: 8 + channel: stable + health: "http://localhost:8095/health" + serve: + kind: uvicorn + port: 8095 + command: + - "~/cbx-env/bin/uvicorn" + - "voice_api:app" + - "--host" + - "0.0.0.0" + - "--port" + - "8095" + - "--app-dir" + - "~/chatterbox" + env: + # Turbo is the served default. Both stay loaded so the /voice A/B Lab + # can compare per request; this only decides what an unqualified + # request gets — i.e. what the downstream caller hears. + CBX_VARIANT: turbo + CBX_VARIANTS: "full,turbo" + # Local copies, not from_pretrained(): snapshot_download needs the + # network and would silently follow upstream if the repo moved. + CBX_TURBO_DIR: "/srv/models/chatterbox-turbo" + CBX_FULL_DIR: "/srv/models/chatterbox-full" + + brain-laguna: + name: "Poolside Laguna S 2.1 118B-A8B (NVFP4 + DFlash)" + # 71 GB main weights + draft, runtime/JIT overhead, and a conservative + # 64k FP8 KV allowance. This is a replacement for `brain`, never a peer. + footprint_gb: 86 + channel: stable + health: "http://localhost:8001/v1/models" + health_contains: "poolside/Laguna-S-2.1-NVFP4" + serve: + kind: vllm + executable: "~/laguna-env/bin/vllm" + port: 8001 + weights: "~/models/Laguna-S-2.1-NVFP4" + served_name: + - brain + - "local-moe" + - "poolside/Laguna-S-2.1-NVFP4" + args: + default-chat-template-kwargs: '{"enable_thinking": false}' + speculative-config: '{"model":"/srv/models/Laguna-S-2.1-DFlash-NVFP4","num_speculative_tokens":15}' + max-model-len: 65536 + kv-cache-dtype: fp8 + gpu-memory-utilization: 0.70 + max-num-seqs: 8 + max-num-batched-tokens: 4096 + enforce-eager: true + enable-auto-tool-choice: true + tool-call-parser: poolside_v1 + reasoning-parser: poolside_v1 + override-generation-config: '{"temperature":0.7,"top_p":0.95}' + env: + CUTE_DSL_ARCH: sm_121a + MAX_JOBS: "4" + PATH: "/usr/local/cuda/bin:/usr/local/bin:/usr/bin:/bin" + + brain-gemma: + name: "Gemma 4 31B-IT (NVFP4)" + # 32.67 GB weights (4 shards, measured via HF repo metadata) + KV/activation + # headroom under a 0.35 gpu-memory-utilization cap. Gemma's mostly-sliding-window + # attention (10 of 60 layers are full-attention, rest capped at a 1024-token + # window) means its real KV cost at 64k context is far lighter than brain/ + # brain-laguna's dense-attention KV — this cap is a conservative first pass, + # not yet confirmed by an actual load on the reference node. + footprint_gb: 44 + channel: stable + health: "http://localhost:8001/v1/models" + health_contains: "nvidia/Gemma-4-31B-IT-NVFP4" + serve: + kind: vllm + executable: "~/gemma-env/bin/vllm" + port: 8001 + weights: "~/models/Gemma-4-31B-IT-NVFP4" + served_name: + - brain + - "local-moe" + - "nvidia/Gemma-4-31B-IT-NVFP4" + args: + max-model-len: 65536 + kv-cache-dtype: fp8 + gpu-memory-utilization: 0.35 + quantization: modelopt + max-num-seqs: 8 + max-num-batched-tokens: 4096 + enforce-eager: true + # Tool-call/reasoning parser support for Gemma 4 is unconfirmed in vLLM + # as of this writing — verify before relying on function-calling. + env: + CUTE_DSL_ARCH: sm_121a + + music: + name: "ACE-Step 1.5 XL 4B sft (music generation)" + footprint_gb: 24 # measured ~21GB resident live on the reference node; 24 declared for safety + channel: stable + health: "http://localhost:8010/health" + serve: + kind: exec + port: 8010 + # 4B XL sft DiT + 1.7B LM (pt backend). Custom FastAPI wrapper (POST /generate -> WAV). + # Runs as a systemd --user unit on the node today; this is the equivalent launch. + command: ["~/ACE-Step-1.5/.venv/bin/python", "~/ace_step_server.py"] + env: + ACESTEP_CONFIG_PATH: acestep-v15-xl-sft + ACESTEP_LM_MODEL_PATH: acestep-5Hz-lm-1.7B + ACESTEP_LM_BACKEND: pt + ACESTEP_API_PORT: "8010" + ACESTEP_API_HOST: 0.0.0.0 + + image: + name: "FLUX.2-klein-9B (BF16)" + # BFL's own card claims ~29GB VRAM, but an independent benchmark that + # actually ran this checkpoint on DGX Spark GB10 measured 66 GB resident + # (95s/image) — trust the on-hardware number for admission control until + # we re-measure it ourselves. Non-commercial license (BFL FLUX license); + # fine for personal use, not for anything monetized. Requires accepting + # the license on HF and `hf auth login` before the weights can download. + footprint_gb: 66 + channel: stable + health: "http://localhost:8007/health" + serve: + kind: diffusers + port: 8007 + command: ["~/flux-env/bin/python", "~/flux_server.py"] + env: + FLUX_MODEL_PATH: "~/models/FLUX.2-klein-9B" + FLUX_API_PORT: "8007" + + embed: + name: "Nemotron 3 Embed 1B (NVFP4) — dense retrieval" + # 1.14B, NVFP4 (~1GB weights); sentence-transformers pooling head, 2048-dim, + # 32k ctx. Serves OpenAI /v1/embeddings via vLLM. Footprint is dominated by + # the gpu-memory-utilization reservation, not the tiny weights. + footprint_gb: 2 + channel: stable + health: "http://localhost:8012/v1/models" + health_contains: "embed" + serve: + kind: vllm + executable: "~/vllm-env/bin/vllm" + port: 8012 + weights: "~/models/Nemotron-3-Embed-1B-NVFP4" + served_name: + - embed + - nemotron-embed + args: + runner: pooling + max-model-len: 32768 + gpu-memory-utilization: 0.05 + enforce-eager: true + + # Alternatives, ready to register when wanted: + # image-klein-4b -> FLUX.2-klein-4B, ~13GB, Apache-2.0 (commercial-safe), untested on Spark + # image-qwen -> Qwen-Image 20B, Apache-2.0, ~63GB/212s measured on Spark, best in-image text rendering diff --git a/scenes/darkroom.scene.yaml b/scenes/darkroom.scene.yaml new file mode 100644 index 0000000..f06d1c4 --- /dev/null +++ b/scenes/darkroom.scene.yaml @@ -0,0 +1,27 @@ +apiVersion: lumbridge/v1 +kind: Scene +metadata: + name: darkroom + version: 1 + description: "Overnight image farm — drops the brain to make room for FLUX.2-klein-9B." + author: karti + tags: [image, overnight, unattended] + +# Drops `brain` so `image` (66 GB, on-hardware measured) fits. ears+voice+music+ +# image commits ~99 GB — tight against the 8 GB admission margin, so this scene +# needs the full 108 GB ceiling (matching studio/voice-laguna), not the old 100. +models: + - ears + - voice + - music + - image + +budget_gb: 108 +activation: + order: footprint-asc + wait_healthy: true + +# Scheduled scenes (planned): hand the box to darkroom overnight, back at 08:00. +# schedule: +# - activate: "03:00" +# - handoff: "04:00" -> studio diff --git a/scenes/music.scene.yaml b/scenes/music.scene.yaml new file mode 100644 index 0000000..b8c3743 --- /dev/null +++ b/scenes/music.scene.yaml @@ -0,0 +1,20 @@ +apiVersion: lumbridge/v1 +kind: Scene +metadata: + name: music + version: 1 + description: "Music studio — ACE-Step XL 4B sft, with ears and voice, no brain." + author: karti + tags: [music, creative] + +# ears 5 + voice 4 + music 24 = 33 GB. Brain-free, so tons of headroom — the clean +# scene for a music-generation demo when the MoE is not needed. +models: + - ears + - voice + - music + +budget_gb: 100 +activation: + order: footprint-asc + wait_healthy: true diff --git a/scenes/studio.scene.yaml b/scenes/studio.scene.yaml new file mode 100644 index 0000000..d5590d2 --- /dev/null +++ b/scenes/studio.scene.yaml @@ -0,0 +1,22 @@ +apiVersion: lumbridge/v1 +kind: Scene +metadata: + name: studio + version: 2 + description: "Live voice assistant — ears, brain, mouth, and music." + author: karti + tags: [assistant, voice, always-on] + +# ears 5 + brain 66 + voice 4 + music (XL 4B sft) 24 = 99 GB declared. +# Empirically validated on the reference node: all four load with ~20 GB MemAvailable free. +# budget bumped to 108 (box is 121 GB) so the Governor admits the measured-safe set. +models: + - ears + - brain + - voice + - music + +budget_gb: 108 +activation: + order: footprint-asc # small first, so brain's big load spike lands last + wait_healthy: true diff --git a/scenes/voice-gemma.scene.yaml b/scenes/voice-gemma.scene.yaml new file mode 100644 index 0000000..d66303e --- /dev/null +++ b/scenes/voice-gemma.scene.yaml @@ -0,0 +1,22 @@ +apiVersion: lumbridge/v1 +kind: Scene +metadata: + name: voice-gemma + version: 1 + description: "Efficient voice assistant — Nemotron ASR, Gemma 4 31B, and Chatterbox." + author: karti + tags: [assistant, voice, efficient, multimodal] + +# Gemma's mostly-sliding-window attention keeps its footprint well under brain +# and brain-laguna's, leaving real headroom in the budget beyond Lumbridge Compute's 8 GB +# admission margin — useful until brain-gemma's footprint is confirmed on +# real hardware. +models: + - ears + - brain-gemma + - voice + +budget_gb: 80 +activation: + order: footprint-asc + wait_healthy: true diff --git a/scenes/voice-laguna.scene.yaml b/scenes/voice-laguna.scene.yaml new file mode 100644 index 0000000..37a6f2b --- /dev/null +++ b/scenes/voice-laguna.scene.yaml @@ -0,0 +1,21 @@ +apiVersion: lumbridge/v1 +kind: Scene +metadata: + name: voice-laguna + version: 1 + description: "High-capability voice assistant — Nemotron ASR, Laguna S 2.1, and Chatterbox." + author: karti + tags: [assistant, voice, coding, reasoning] + +# Laguna replaces Qwen and intentionally excludes ACE-Step. The 108 GB scene +# budget matches the empirically safe studio ceiling on the reference node while retaining +# Lumbridge Compute's separate 8 GB admission margin. +models: + - ears + - brain-laguna + - voice + +budget_gb: 108 +activation: + order: footprint-asc + wait_healthy: true diff --git a/scenes/voice-qwen.scene.yaml b/scenes/voice-qwen.scene.yaml new file mode 100644 index 0000000..a5dd4e1 --- /dev/null +++ b/scenes/voice-qwen.scene.yaml @@ -0,0 +1,26 @@ +apiVersion: lumbridge/v1 +kind: Scene +metadata: + name: voice-qwen + version: 2 + description: "Superseded by a newer scene on this node. Kept only because it is still the recorded fallback." + author: karti + tags: [assistant, voice, low-latency, deprecated] + +# DEPRECATED as of 2026-08-02, superseded by a newer scene. Retained solely +# because last_known_good still points at it; delete once the fallback rolls forward. +# +# Its ordering was made brain-first to match its successor. `brain` now runs MTP, whose +# KV-cache profiling spike is not bounded by gpu-memory-utilization; the old +# footprint-asc order would start voice+ears first and leave brain short enough +# to trip the 3GB watchdog floor. A fallback that cannot come up is worse than +# no fallback. +models: + - brain + - ears + - voice + +budget_gb: 100 +activation: + order: listed + wait_healthy: true diff --git a/src/agent.rs b/src/agent.rs new file mode 100644 index 0000000..1863b24 --- /dev/null +++ b/src/agent.rs @@ -0,0 +1,87 @@ +//! Resident Lumbridge Compute supervisor. + +use anyhow::{Context, Result}; +use std::path::Path; +use std::sync::mpsc; +use std::thread; +use std::time::Duration; + +use crate::{gateway, lifecycle, mem, proc}; + +pub fn run(root: &Path, listen: &str, upstream: &str, floor: f64) -> Result<()> { + println!("Lumbridge Compute agent starting"); + lifecycle::resume(root).context("resuming persisted desired Scene")?; + + let (gateway_done_tx, gateway_done_rx) = mpsc::channel(); + let listen_owned = listen.to_string(); + let upstream_owned = upstream.to_string(); + thread::spawn(move || { + let result = gateway::run(&listen_owned, &upstream_owned); + gateway_done_tx.send(result).ok(); + }); + + println!( + "Lumbridge Compute agent supervising memory floor {:.1} GB", + floor + ); + loop { + match gateway_done_rx.try_recv() { + Ok(result) => return result.context("stable gateway stopped"), + Err(mpsc::TryRecvError::Disconnected) => { + anyhow::bail!("stable gateway supervisor disconnected") + } + Err(mpsc::TryRecvError::Empty) => {} + } + enforce_memory_floor(root, floor)?; + thread::sleep(Duration::from_secs(1)); + } +} + +fn enforce_memory_floor(root: &Path, floor: f64) -> Result<()> { + let memory = mem::read()?; + if memory.available_gb >= floor { + return Ok(()); + } + // Take the same lock a Scene transition takes, and skip this tick if a transition + // already holds it. Without this the watchdog races activation: activation is + // deliberately a stop-all-then-start-all sequence, so mid-transition the pool is + // legitimately tight and `state.procs` is being rewritten underneath us. Firing then + // would kill a model the transition just started, and then write a stale `state` + // over the transition's own — losing track of a process that is still alive. + // + // A tick skipped here costs one second. The floor is a backstop, and the transition + // holding the lock is doing its own admission checks. + let _lock = match lifecycle::TransitionLock::acquire(root) { + Ok(lock) => lock, + Err(_) => { + eprintln!( + "agent: MemAvailable {:.1} GB < floor {:.1}, but a Scene transition holds the \ + lock; deferring to it for this tick", + memory.available_gb, floor + ); + return Ok(()); + } + }; + let mut state = proc::State::load_checked(root)?; + match state.newest_alive() { + Some((id, process)) => { + eprintln!( + "agent: MemAvailable {:.1} GB < floor {:.1}; stopping newest owned model '{}' (pid {})", + memory.available_gb, floor, id, process.pid + ); + proc::stop_owned(&process)?; + state.procs.remove(&id); + state.active_scene = None; + state.last_error = Some(format!( + "watchdog stopped '{id}' after MemAvailable fell to {:.1} GB", + memory.available_gb + )); + state.save(root)?; + } + None => eprintln!( + "agent: MemAvailable {:.1} GB < floor {:.1}, but no identity-owned model can be stopped", + memory.available_gb, floor + ), + } + Ok(()) +} diff --git a/src/config.rs b/src/config.rs new file mode 100644 index 0000000..3f036e9 --- /dev/null +++ b/src/config.rs @@ -0,0 +1,151 @@ +//! Config types + loaders for the model registry and scenes. +//! +//! The registry (`registry/models.yaml`) resolves stable model *ids* to weights + +//! launch commands, and evolves as models requantize. Scenes (`scenes/*.scene.yaml`) +//! reference those ids and stay stable — the public, shareable contract. +//! +//! Several fields below are deserialized but never read by the binary +//! (`api_version`, `channel`, `entry`, `app`, `app_dir`, `tags`, `author`). +//! That is deliberate: they are the published `lumbridge/v1` manifest surface, +//! and declaring them is what makes a manifest carrying them parse rather than +//! fail. Deleting them to satisfy the lint would silently narrow the contract. +#![allow(dead_code)] + +use anyhow::{Context, Result}; +use serde::Deserialize; +use std::collections::BTreeMap; +use std::fs; +use std::path::Path; + +#[derive(Debug, Deserialize)] +pub struct Registry { + #[serde(rename = "apiVersion")] + pub api_version: String, + pub models: BTreeMap, +} + +#[derive(Debug, Clone, Deserialize)] +pub struct Model { + pub name: String, + /// Worst-case unified memory held once serving (weights + KV/cache + encoder). + pub footprint_gb: f64, + /// `stable` pins the exact weights; `latest` may resolve a newer quant. + #[serde(default)] + pub channel: Option, + #[serde(default)] + pub health: Option, + /// Optional marker that must appear in the health response. This + /// distinguishes mutually-exclusive models that intentionally share a port. + #[serde(default)] + pub health_contains: Option, + pub serve: Serve, +} + +/// How to launch a model. Fields are permissive across runtimes (vllm / diffusers / +/// python / uvicorn); only the ones a given `kind` needs are populated. +#[derive(Debug, Clone, Deserialize)] +pub struct Serve { + pub kind: String, + /// Optional runtime executable for kind-based builders (for example a + /// model-specific vLLM virtualenv). Defaults to the kind's command on PATH. + #[serde(default)] + pub executable: Option, + #[serde(default)] + pub port: Option, + /// Explicit launch argv. If set, it is used verbatim (argv[0] = program) and + /// takes precedence over any `kind`-based builder. This is where launch commands + /// live — never in a scene — so downloaded scenes can't smuggle code. + #[serde(default)] + pub command: Vec, + #[serde(default)] + pub weights: Option, + #[serde(default)] + pub entry: Option, + #[serde(default)] + pub app: Option, + #[serde(default)] + pub app_dir: Option, + #[serde(default)] + pub served_name: Vec, + #[serde(default)] + pub args: BTreeMap, + #[serde(default)] + pub env: BTreeMap, +} + +#[derive(Debug, Deserialize)] +pub struct Scene { + #[serde(rename = "apiVersion")] + pub api_version: String, + pub metadata: SceneMeta, + /// Stable model ids resolved via the registry. + pub models: Vec, + /// Optional per-scene budget override (GB); defaults to the Governor's global budget. + #[serde(default)] + pub budget_gb: Option, + #[serde(default)] + pub activation: Option, +} + +#[derive(Debug, Deserialize)] +pub struct SceneMeta { + pub name: String, + #[serde(default)] + pub version: u32, + #[serde(default)] + pub description: String, + #[serde(default)] + pub tags: Vec, + #[serde(default)] + pub author: Option, +} + +#[derive(Debug, Deserialize)] +pub struct Activation { + /// `footprint-asc` (default) | `listed`. + #[serde(default)] + pub order: Option, + #[serde(default)] + pub wait_healthy: Option, +} + +impl Registry { + pub fn load(root: &Path) -> Result { + let p = root.join("registry/models.yaml"); + let s = + fs::read_to_string(&p).with_context(|| format!("reading registry {}", p.display()))?; + serde_yaml::from_str(&s).with_context(|| format!("parsing registry {}", p.display())) + } +} + +/// Load every `*.scene.yaml` under `/scenes`, sorted by name. +pub fn load_scenes(root: &Path) -> Result> { + let dir = root.join("scenes"); + let mut out = Vec::new(); + if !dir.exists() { + return Ok(out); + } + for entry in fs::read_dir(&dir).with_context(|| format!("reading {}", dir.display()))? { + let path = entry?.path(); + let is_scene = path + .file_name() + .and_then(|n| n.to_str()) + .map(|n| n.ends_with(".scene.yaml")) + .unwrap_or(false); + if is_scene { + let s = fs::read_to_string(&path)?; + let scene: Scene = + serde_yaml::from_str(&s).with_context(|| format!("parsing {}", path.display()))?; + out.push(scene); + } + } + out.sort_by(|a, b| a.metadata.name.cmp(&b.metadata.name)); + Ok(out) +} + +pub fn find_scene(root: &Path, name: &str) -> Result { + load_scenes(root)? + .into_iter() + .find(|s| s.metadata.name == name) + .with_context(|| format!("no scene named '{name}' in {}/scenes", root.display())) +} diff --git a/src/eval.rs b/src/eval.rs new file mode 100644 index 0000000..1fdf283 --- /dev/null +++ b/src/eval.rs @@ -0,0 +1,495 @@ +//! Reproducible evaluations for any OpenAI-compatible model server. +//! +//! Suites are declarative YAML. Results are append-only JSON artifacts suitable +//! for CI, regression comparisons, and future publication to an eval registry. + +use anyhow::{bail, Context, Result}; +use serde::{Deserialize, Serialize}; +use serde_json::{json, Value}; +use std::fs; +use std::io::{BufRead, BufReader, Write}; +use std::path::{Path, PathBuf}; +use std::process::{Command, Stdio}; +use std::time::{Instant, SystemTime, UNIX_EPOCH}; + +#[derive(Debug, Deserialize)] +struct Suite { + #[serde(rename = "apiVersion")] + api_version: String, + kind: String, + metadata: Metadata, + #[serde(default)] + defaults: Defaults, + cases: Vec, +} + +#[derive(Debug, Deserialize)] +struct Metadata { + name: String, + #[serde(default)] + version: u32, + #[serde(default)] + description: String, + /// Part of the published suite manifest surface; parsed so a suite + /// carrying tags loads, not read by the runner itself. + #[serde(default)] + #[allow(dead_code)] + tags: Vec, +} + +#[derive(Debug, Default, Deserialize)] +struct Defaults { + #[serde(default = "default_max_tokens")] + max_tokens: u32, + #[serde(default = "default_temperature")] + temperature: f64, + #[serde(default = "default_repeat")] + repeat: u32, + #[serde(default)] + system: String, +} + +fn default_max_tokens() -> u32 { + 128 +} +fn default_temperature() -> f64 { + 0.0 +} +fn default_repeat() -> u32 { + 1 +} + +#[derive(Debug, Deserialize)] +struct Case { + id: String, + #[serde(default)] + category: String, + prompt: String, + #[serde(default)] + max_tokens: Option, + #[serde(default)] + assertions: Vec, +} + +#[derive(Debug, Deserialize)] +#[serde(tag = "type", rename_all = "snake_case")] +enum Assertion { + Exact { value: String }, + Contains { value: String }, + ContainsAny { values: Vec }, + NotContains { value: String }, + MaxWords { value: usize }, +} + +#[derive(Debug, Serialize)] +struct Artifact { + schema_version: u32, + run_id: String, + suite: String, + suite_version: u32, + model: String, + base_url: String, + started_unix_ms: u128, + summary: Summary, + samples: Vec, +} + +#[derive(Debug, Serialize)] +struct Summary { + passed: usize, + total: usize, + score: f64, + mean_ttft_ms: f64, + p50_ttft_ms: f64, + p95_ttft_ms: f64, + mean_prefill_tps: f64, + mean_decode_tps: f64, +} + +#[derive(Debug, Serialize)] +struct Sample { + case_id: String, + category: String, + repetition: u32, + passed: bool, + assertion_results: Vec, + output: String, + reasoning: String, + prompt_tokens: u64, + completion_tokens: u64, + ttft_ms: f64, + total_ms: f64, + prefill_tps: f64, + decode_tps: f64, +} + +struct Completion { + output: String, + reasoning: String, + prompt_tokens: u64, + completion_tokens: u64, + ttft_ms: f64, + total_ms: f64, +} + +/// One line of `eval ls`. Suites themselves stay private — a caller has no +/// business reaching into cases and assertions — but the catalogue is the +/// useful part and is shared by the CLI and the MCP server. +#[derive(Debug, Clone)] +pub struct SuiteSummary { + pub name: String, + pub version: u32, + pub cases: usize, + pub description: String, +} + +pub fn catalogue(root: &Path) -> Result> { + Ok(load_all(root)? + .into_iter() + .map(|s| SuiteSummary { + name: s.metadata.name, + version: s.metadata.version, + cases: s.cases.len(), + description: s.metadata.description, + }) + .collect()) +} + +pub fn list(root: &Path) -> Result<()> { + println!("{:<20} {:>4} {:>5} DESCRIPTION", "SUITE", "VER", "CASES"); + for s in catalogue(root)? { + println!( + "{:<20} {:>4} {:>5} {}", + s.name, s.version, s.cases, s.description + ); + } + Ok(()) +} + +pub fn run( + root: &Path, + name: &str, + base_url: &str, + model: &str, + repeat: Option, +) -> Result<()> { + let suite = load(root, name)?; + // `kuda/v1` is the pre-rename contract; still accepted so an older suite keeps running. + let known_contract = matches!(suite.api_version.as_str(), "lumbridge/v1" | "kuda/v1"); + if !known_contract || suite.kind != "EvalSuite" { + bail!( + "unsupported eval contract: {}/{}", + suite.api_version, + suite.kind + ); + } + let reps = repeat.unwrap_or(suite.defaults.repeat).max(1); + println!( + "eval '{}' v{} → {} ({})", + suite.metadata.name, suite.metadata.version, model, base_url + ); + let started = now_ms(); + let mut samples = Vec::new(); + for case in &suite.cases { + for repetition in 1..=reps { + print!(" {:<24} [{}/{}] ", case.id, repetition, reps); + std::io::stdout().flush().ok(); + let c = stream_completion(base_url, model, &suite.defaults, case)?; + let assertion_results: Vec = case + .assertions + .iter() + .map(|a| evaluate(a, &c.output)) + .collect(); + let passed = assertion_results.iter().all(|v| *v); + let decode_seconds = ((c.total_ms - c.ttft_ms) / 1000.0).max(0.001); + let prefill_seconds = (c.ttft_ms / 1000.0).max(0.001); + let sample = Sample { + case_id: case.id.clone(), + category: case.category.clone(), + repetition, + passed, + assertion_results, + output: c.output, + reasoning: c.reasoning, + prompt_tokens: c.prompt_tokens, + completion_tokens: c.completion_tokens, + ttft_ms: c.ttft_ms, + total_ms: c.total_ms, + prefill_tps: c.prompt_tokens as f64 / prefill_seconds, + decode_tps: c.completion_tokens as f64 / decode_seconds, + }; + println!( + "{} ttft={:.0}ms decode={:.1}tok/s", + if passed { "PASS" } else { "FAIL" }, + sample.ttft_ms, + sample.decode_tps + ); + samples.push(sample); + } + } + let summary = summarize(&samples); + let run_id = format!("{}-{}-{}", started, slug(name), slug(model)); + let artifact = Artifact { + schema_version: 1, + run_id: run_id.clone(), + suite: suite.metadata.name, + suite_version: suite.metadata.version, + model: model.to_string(), + base_url: base_url.to_string(), + started_unix_ms: started, + summary, + samples, + }; + let out_dir = root.join("eval-results"); + fs::create_dir_all(&out_dir)?; + let out = out_dir.join(format!("{run_id}.json")); + fs::write(&out, serde_json::to_string_pretty(&artifact)?)?; + println!( + "\nscore {:.1}% ({}/{}) · mean TTFT {:.0}ms · prefill≈{:.1}tok/s · decode {:.1}tok/s", + artifact.summary.score * 100.0, + artifact.summary.passed, + artifact.summary.total, + artifact.summary.mean_ttft_ms, + artifact.summary.mean_prefill_tps, + artifact.summary.mean_decode_tps + ); + println!("result {}", out.display()); + Ok(()) +} + +fn stream_completion( + base_url: &str, + model: &str, + defaults: &Defaults, + case: &Case, +) -> Result { + let url = format!("{}/chat/completions", base_url.trim_end_matches('/')); + let mut messages = Vec::new(); + if !defaults.system.is_empty() { + messages.push(json!({"role":"system","content":defaults.system})); + } + messages.push(json!({"role":"user","content":case.prompt})); + let request = json!({ + "model": model, "messages": messages, "stream": true, + "stream_options": {"include_usage": true}, + "max_tokens": case.max_tokens.unwrap_or(defaults.max_tokens), + "temperature": defaults.temperature, + "chat_template_kwargs": {"enable_thinking": false} + }); + let mut child = Command::new("curl") + .args([ + "-sS", + "-N", + "-X", + "POST", + &url, + "-H", + "Content-Type: application/json", + "--data-binary", + "@-", + ]) + .stdin(Stdio::piped()) + .stdout(Stdio::piped()) + .stderr(Stdio::piped()) + .spawn() + .context("starting curl (required for eval HTTP streaming)")?; + child + .stdin + .take() + .unwrap() + .write_all(request.to_string().as_bytes())?; + let start = Instant::now(); + let mut first = None; + let mut output = String::new(); + let mut reasoning = String::new(); + let mut prompt_tokens = 0; + let mut completion_tokens = 0; + for line in BufReader::new(child.stdout.take().unwrap()).lines() { + let line = line?; + let Some(data) = line.strip_prefix("data: ") else { + continue; + }; + if data == "[DONE]" { + break; + } + let v: Value = serde_json::from_str(data).context("parsing streamed completion")?; + if let Some(usage) = v.get("usage") { + prompt_tokens = usage + .get("prompt_tokens") + .and_then(Value::as_u64) + .unwrap_or(prompt_tokens); + completion_tokens = usage + .get("completion_tokens") + .and_then(Value::as_u64) + .unwrap_or(completion_tokens); + } + let delta = &v["choices"][0]["delta"]; + let content = delta.get("content").and_then(Value::as_str).unwrap_or(""); + let thought = delta + .get("reasoning") + .or_else(|| delta.get("reasoning_content")) + .and_then(Value::as_str) + .unwrap_or(""); + if first.is_none() && (!content.is_empty() || !thought.is_empty()) { + first = Some(start.elapsed()); + } + output.push_str(content); + reasoning.push_str(thought); + } + let status = child.wait()?; + if !status.success() { + bail!("completion request failed with {status}"); + } + let total = start.elapsed().as_secs_f64() * 1000.0; + Ok(Completion { + output, + reasoning, + prompt_tokens, + completion_tokens, + ttft_ms: first.map(|d| d.as_secs_f64() * 1000.0).unwrap_or(total), + total_ms: total, + }) +} + +fn evaluate(a: &Assertion, output: &str) -> bool { + let normalized = output.trim(); + match a { + Assertion::Exact { value } => normalized.eq_ignore_ascii_case(value.trim()), + Assertion::Contains { value } => normalized.to_lowercase().contains(&value.to_lowercase()), + Assertion::ContainsAny { values } => values + .iter() + .any(|v| normalized.to_lowercase().contains(&v.to_lowercase())), + Assertion::NotContains { value } => { + !normalized.to_lowercase().contains(&value.to_lowercase()) + } + Assertion::MaxWords { value } => normalized.split_whitespace().count() <= *value, + } +} + +fn summarize(samples: &[Sample]) -> Summary { + let mut ttft: Vec = samples.iter().map(|s| s.ttft_ms).collect(); + ttft.sort_by(f64::total_cmp); + let mean = |f: fn(&Sample) -> f64| { + if samples.is_empty() { + 0.0 + } else { + samples.iter().map(f).sum::() / samples.len() as f64 + } + }; + let percentile = |p: f64| { + if ttft.is_empty() { + 0.0 + } else { + ttft[((ttft.len() - 1) as f64 * p).round() as usize] + } + }; + let passed = samples.iter().filter(|s| s.passed).count(); + Summary { + passed, + total: samples.len(), + score: if samples.is_empty() { + 0.0 + } else { + passed as f64 / samples.len() as f64 + }, + mean_ttft_ms: mean(|s| s.ttft_ms), + p50_ttft_ms: percentile(0.50), + p95_ttft_ms: percentile(0.95), + mean_prefill_tps: mean(|s| s.prefill_tps), + mean_decode_tps: mean(|s| s.decode_tps), + } +} + +fn load(root: &Path, name: &str) -> Result { + load_all(root)? + .into_iter() + .find(|s| s.metadata.name == name) + .with_context(|| format!("no eval suite named '{name}' in {}/evals", root.display())) +} + +fn load_all(root: &Path) -> Result> { + let dir = root.join("evals"); + let mut suites = Vec::new(); + if !dir.exists() { + return Ok(suites); + } + for entry in fs::read_dir(&dir)? { + let path: PathBuf = entry?.path(); + if path + .file_name() + .and_then(|n| n.to_str()) + .map(|n| n.ends_with(".eval.yaml")) + .unwrap_or(false) + { + let suite: Suite = serde_yaml::from_str(&fs::read_to_string(&path)?) + .with_context(|| format!("parsing {}", path.display()))?; + suites.push(suite); + } + } + suites.sort_by(|a, b| a.metadata.name.cmp(&b.metadata.name)); + Ok(suites) +} + +fn now_ms() -> u128 { + SystemTime::now() + .duration_since(UNIX_EPOCH) + .unwrap_or_default() + .as_millis() +} +fn slug(s: &str) -> String { + s.chars() + .map(|c| { + if c.is_ascii_alphanumeric() { + c.to_ascii_lowercase() + } else { + '-' + } + }) + .collect() +} + +#[cfg(test)] +mod tests { + use super::*; + + #[test] + fn assertions_are_case_insensitive_and_composable() { + let output = "Market risk remains, while company-specific risk falls."; + assert!(evaluate( + &Assertion::Contains { + value: "MARKET RISK".into() + }, + output + )); + assert!(evaluate( + &Assertion::ContainsAny { + values: vec!["idiosyncratic".into(), "company-specific".into()], + }, + output + )); + assert!(evaluate( + &Assertion::NotContains { + value: "markdown".into() + }, + output + )); + } + + #[test] + fn exact_trims_but_does_not_accept_explanation() { + assert!(evaluate(&Assertion::Exact { value: "25".into() }, " 25\n")); + assert!(!evaluate(&Assertion::Exact { value: "25".into() }, "25 GB")); + } + + #[test] + fn word_limit_counts_whitespace_tokens() { + assert!(evaluate( + &Assertion::MaxWords { value: 4 }, + "one two three four" + )); + assert!(!evaluate( + &Assertion::MaxWords { value: 3 }, + "one two three four" + )); + } +} diff --git a/src/gateway.rs b/src/gateway.rs new file mode 100644 index 0000000..47df813 --- /dev/null +++ b/src/gateway.rs @@ -0,0 +1,102 @@ +//! Streaming-safe TCP gateway for OpenAI-compatible model servers. +//! +//! The gateway deliberately stays below HTTP: it forwards bytes unchanged, so +//! chunked responses and server-sent-event token streams retain their timing and +//! semantics while clients keep one stable Lumbridge Compute address. + +use anyhow::{Context, Result}; +use std::io; +use std::net::{Shutdown, TcpListener, TcpStream}; +use std::thread; + +pub fn run(listen: &str, upstream: &str) -> Result<()> { + let listener = TcpListener::bind(listen) + .with_context(|| format!("binding Lumbridge gateway at {listen}"))?; + println!("Lumbridge gateway {listen} -> {upstream}"); + serve_listener(listener, upstream, None) +} + +fn serve_listener( + listener: TcpListener, + upstream: &str, + max_connections: Option, +) -> Result<()> { + let mut accepted = 0usize; + for incoming in listener.incoming() { + let client = match incoming { + Ok(client) => client, + Err(error) => { + eprintln!("gateway accept failed: {error}"); + continue; + } + }; + let upstream = upstream.to_string(); + thread::spawn(move || { + if let Err(error) = proxy(client, &upstream) { + eprintln!("gateway request failed: {error:#}"); + } + }); + accepted += 1; + if max_connections.is_some_and(|limit| accepted >= limit) { + break; + } + } + Ok(()) +} + +fn proxy(mut client: TcpStream, upstream_addr: &str) -> Result<()> { + client.set_nodelay(true).ok(); + let mut upstream = TcpStream::connect(upstream_addr) + .with_context(|| format!("connecting gateway upstream {upstream_addr}"))?; + upstream.set_nodelay(true).ok(); + + let mut client_reader = client.try_clone()?; + let mut upstream_writer = upstream.try_clone()?; + let request = thread::spawn(move || -> io::Result { + let copied = io::copy(&mut client_reader, &mut upstream_writer)?; + upstream_writer.shutdown(Shutdown::Write).ok(); + Ok(copied) + }); + + io::copy(&mut upstream, &mut client)?; + client.shutdown(Shutdown::Write).ok(); + request + .join() + .map_err(|_| anyhow::anyhow!("gateway request-copy thread panicked"))??; + Ok(()) +} + +#[cfg(test)] +mod tests { + use super::*; + use std::io::{Read, Write}; + + #[test] + fn gateway_forwards_bidirectional_bytes_without_buffering_protocols() { + let upstream = TcpListener::bind("127.0.0.1:0").unwrap(); + let upstream_addr = upstream.local_addr().unwrap(); + let upstream_thread = thread::spawn(move || { + let (mut socket, _) = upstream.accept().unwrap(); + let mut request = [0u8; 4]; + socket.read_exact(&mut request).unwrap(); + assert_eq!(&request, b"ping"); + socket.write_all(b"pong").unwrap(); + }); + + let gateway = TcpListener::bind("127.0.0.1:0").unwrap(); + let gateway_addr = gateway.local_addr().unwrap(); + let gateway_thread = thread::spawn(move || { + serve_listener(gateway, &upstream_addr.to_string(), Some(1)).unwrap(); + }); + + let mut client = TcpStream::connect(gateway_addr).unwrap(); + client.write_all(b"ping").unwrap(); + client.shutdown(Shutdown::Write).unwrap(); + let mut response = Vec::new(); + client.read_to_end(&mut response).unwrap(); + assert_eq!(response, b"pong"); + + upstream_thread.join().unwrap(); + gateway_thread.join().unwrap(); + } +} diff --git a/src/governor.rs b/src/governor.rs new file mode 100644 index 0000000..d1a0c0b --- /dev/null +++ b/src/governor.rs @@ -0,0 +1,223 @@ +//! The Governor — the kernel of Lumbridge Compute. +//! +//! On a unified-memory box, over-commit doesn't fail gracefully: the whole machine +//! thrashes and wedges (SSH/ping included) before the OOM killer acts. The Governor +//! makes that impossible via (1) admission control against a hard budget and +//! (2) a watchdog on `MemAvailable` that kills the newest model before thrash. +//! +//! This module currently provides the *sensing* + *admission* half. The watchdog and +//! process spawn/kill land with the `up`/`activate` commands. + +use crate::config::{Model, Registry}; +use std::io::{Read, Write}; +use std::net::{SocketAddr, TcpStream}; +use std::time::{Duration, Instant}; + +/// Usable memory for models; the rest is reserved for the OS/desktop. +pub const DEFAULT_BUDGET_GB: f64 = 100.0; +/// Extra headroom required before admitting a new model. +pub const SAFETY_MARGIN_GB: f64 = 8.0; +/// If `MemAvailable` dips below this, the watchdog kills the newest model. +pub const WATCHDOG_FLOOR_GB: f64 = 3.0; + +/// A model is considered "running" if its serving port accepts a connection. +pub fn port_open(port: u16) -> bool { + let addr = SocketAddr::from(([127, 0, 0, 1], port)); + TcpStream::connect_timeout(&addr, Duration::from_millis(150)).is_ok() +} + +pub fn is_running(m: &Model) -> bool { + let Some(port) = m.serve.port else { + return false; + }; + if !port_open(port) { + return false; + } + match &m.health_contains { + Some(marker) => health_response(m, port) + .map(|response| response.contains(marker)) + .unwrap_or(false), + None => true, + } +} + +/// Fetch the local HTTP health endpoint without adding an HTTP client runtime. +/// Registry health URLs are deliberately localhost-only. +fn health_response(m: &Model, port: u16) -> Option { + let path = m + .health + .as_deref() + .and_then(|url| url.split_once("localhost")) + .map(|(_, tail)| tail.trim_start_matches(|c: char| c.is_ascii_digit() || c == ':')) + .filter(|path| path.starts_with('/')) + .unwrap_or("/"); + let addr = SocketAddr::from(([127, 0, 0, 1], port)); + let mut stream = TcpStream::connect_timeout(&addr, Duration::from_millis(300)).ok()?; + stream + .set_read_timeout(Some(Duration::from_millis(500))) + .ok()?; + stream + .write_all(format!("GET {path} HTTP/1.0\r\nHost: localhost\r\n\r\n").as_bytes()) + .ok()?; + let mut response = String::new(); + stream.read_to_string(&mut response).ok()?; + Some(response) +} + +pub fn running_ids(reg: &Registry) -> Vec { + reg.models + .iter() + .filter(|(_, m)| is_running(m)) + .map(|(id, _)| id.clone()) + .collect() +} + +/// Sum of footprints of all currently-serving registered models. +pub fn committed_gb(reg: &Registry) -> f64 { + reg.models + .values() + .filter(|m| is_running(m)) + .map(|m| m.footprint_gb) + .sum() +} + +/// Admission control. Two independent ceilings, and both must hold. +/// +/// 1. **Declared** — `committed + add + margin <= budget`. +/// 2. **Observed** — `add + margin <= available`. +/// +/// The second one is what makes the promise real. `budget_gb`, and every +/// `footprint_gb` feeding `committed_gb`, are numbers a human typed into the +/// registry. If any of them is optimistic — a model that grows past its declared +/// footprint, a KV cache larger than expected, anything started outside Compute — +/// the declared check happily passes while the box is already out of memory, and +/// on unified memory that ends in a wedged machine rather than a failed malloc. +/// `available_gb` comes from `MemAvailable`, which counts reality. +/// +/// `available_gb` is `None` when sensing failed. That falls back to the declared +/// ceiling alone: refusing every start because /proc/meminfo was unreadable would +/// turn a sensing failure into a total outage. +pub fn can_admit( + add_gb: f64, + committed_gb: f64, + budget_gb: f64, + available_gb: Option, +) -> bool { + if committed_gb + add_gb + SAFETY_MARGIN_GB > budget_gb { + return false; + } + match available_gb { + Some(available) => add_gb + SAFETY_MARGIN_GB <= available, + None => true, + } +} + +/// What admission will actually enforce right now, for reporting. The lower of the +/// declared headroom and the observed headroom. +pub fn headroom_gb(committed_gb: f64, budget_gb: f64, available_gb: Option) -> f64 { + let declared = budget_gb - committed_gb - SAFETY_MARGIN_GB; + match available_gb { + Some(available) => declared.min(available - SAFETY_MARGIN_GB), + None => declared, + } +} + +/// Block until the exact registered model is healthy, or `timeout` elapses. +/// Models without a port are considered instantly ready. +pub fn wait_healthy(m: &Model, timeout: Duration) -> bool { + let Some(_) = m.serve.port else { + return true; + }; + let start = Instant::now(); + while start.elapsed() < timeout { + if is_running(m) { + return true; + } + std::thread::sleep(Duration::from_millis(400)); + } + false +} + +#[cfg(test)] +mod tests { + use super::*; + + // A 108 GB Scene budget on a box with plenty free — the ordinary case. + const BUDGET: f64 = 108.0; + + #[test] + fn admits_when_both_declared_and_observed_ceilings_allow_it() { + assert!(can_admit(66.0, 9.0, BUDGET, Some(100.0))); + } + + #[test] + fn refuses_when_the_declared_budget_is_exceeded() { + // 66 + 40 + 8 margin = 114 > 108, even though the box has memory free. + assert!(!can_admit(66.0, 40.0, BUDGET, Some(100.0))); + } + + #[test] + fn refuses_when_the_box_is_out_of_memory_even_though_the_paperwork_agrees() { + // This is the case the declared check alone could never catch: nothing is + // registered as committed, so the budget says there is 100 GB of room, but + // MemAvailable says 20 GB. Something outside Compute is holding the pool. + assert!(can_admit(66.0, 0.0, BUDGET, None), "declared check passes"); + assert!(!can_admit(66.0, 0.0, BUDGET, Some(20.0))); + } + + #[test] + fn the_safety_margin_is_enforced_against_observed_memory_too() { + // 66 GB model with exactly 66 GB free is a refusal: the margin has to fit. + assert!(!can_admit(66.0, 0.0, BUDGET, Some(66.0))); + assert!(!can_admit( + 66.0, + 0.0, + BUDGET, + Some(66.0 + SAFETY_MARGIN_GB - 0.1) + )); + assert!(can_admit(66.0, 0.0, BUDGET, Some(66.0 + SAFETY_MARGIN_GB))); + } + + #[test] + fn failed_sensing_falls_back_to_the_declared_ceiling_rather_than_refusing_everything() { + assert!(can_admit(66.0, 9.0, BUDGET, None)); + // ...but it must not become a way to bypass the declared budget. + assert!(!can_admit(66.0, 40.0, BUDGET, None)); + } + + #[test] + fn a_zero_reading_refuses_everything_rather_than_admitting_everything() { + // parse_meminfo yields 0.0 for an unparseable /proc. That has to read as + // "no memory", not as "no constraint". + assert!(!can_admit(1.0, 0.0, BUDGET, Some(0.0))); + } + + #[test] + fn headroom_never_exceeds_what_the_machine_actually_has() { + // The shape of a real regression: a generous declared budget on a smaller box. Reporting + // budget-minus-committed here promises room the next admission will refuse, and both the + // MCP tool and the HTTP API serve this number to callers that cannot check it themselves. + let box_available = 55.8; + let declared_budget = 100.0; + let reported = headroom_gb(0.0, declared_budget, Some(box_available)); + assert!( + reported <= box_available, + "reported {reported} GB of headroom on a box with {box_available} GB free", + ); + assert!(can_admit( + reported, + 0.0, + declared_budget, + Some(box_available) + )); + } + + #[test] + fn headroom_reports_the_binding_constraint_not_the_generous_one() { + // Declared says 33 GB spare; the box says 12 GB spare minus margin. + assert_eq!(headroom_gb(67.0, BUDGET, None), 33.0); + assert_eq!(headroom_gb(67.0, BUDGET, Some(12.0)), 4.0); + // And the declared ceiling still wins when it is the tighter of the two. + assert_eq!(headroom_gb(100.0, BUDGET, Some(90.0)), 0.0); + } +} diff --git a/src/http.rs b/src/http.rs new file mode 100644 index 0000000..400feb2 --- /dev/null +++ b/src/http.rs @@ -0,0 +1,326 @@ +//! A read-only HTTP control API. +//! +//! This exists so a web UI can read a node's state without shelling out to the CLI. It is a +//! second transport over the operations the MCP server already models — `collect_status`, +//! `collect_models`, `collect_scenes`, `collect_scene`, `collect_evals` — deliberately not a +//! second implementation of them, so the two surfaces cannot drift. +//! +//! Hand-rolled on `std::net`, matching `gateway.rs`. An HTTP framework would pull a dependency +//! tree an order of magnitude larger than the whole rest of this binary, to serve five routes +//! that return pre-serialised JSON. +//! +//! # What this deliberately does not do +//! +//! **It never mutates.** No activate, no stop, no eval run. A read-only surface that a browser +//! can reach is a much smaller thing to get right than one that can move a node's memory around, +//! and the read half is what a dashboard actually needs. +//! +//! # Why the defaults are what they are +//! +//! - **Loopback only.** The listen address defaults to `127.0.0.1`. There is no authentication +//! worth the name here, so a bind to `0.0.0.0` publishes your node's inventory to the network. +//! - **CORS off.** No origin is allowed unless named with `--allow-origin`. Allowing `*` would +//! let *any* page you visit read what models you run, which is a fingerprint of your machine. +//! - **The token is optional but checked in constant time.** Loopback plus an origin allowlist +//! already stops the browser attack; the token is for the case where someone puts this behind +//! a proxy anyway. + +use anyhow::{Context, Result}; +use std::io::{BufRead, BufReader, Read, Write}; +use std::net::{TcpListener, TcpStream}; +use std::path::{Path, PathBuf}; +use std::thread; +use std::time::Duration; + +use crate::mcp::{collect_evals, collect_models, collect_scene, collect_scenes, collect_status}; + +/// Requests are tiny and come from localhost; anything slower than this is not a browser. +const READ_TIMEOUT: Duration = Duration::from_secs(5); +/// A request line plus headers. Anything larger is not a request we serve. +const MAX_HEAD_BYTES: usize = 8 * 1024; + +pub struct Config { + pub root: PathBuf, + /// Origins permitted to read this API from a browser. Empty means none. + pub allowed_origins: Vec, + /// When set, every request must carry `Authorization: Bearer `. + pub token: Option, +} + +pub fn run(listen: &str, config: Config) -> Result<()> { + let listener = TcpListener::bind(listen) + .with_context(|| format!("binding the Lumbridge Compute API at {listen}"))?; + println!( + "Lumbridge Compute API on {listen} (read-only) · origins: {} · token: {}", + if config.allowed_origins.is_empty() { + "none".to_string() + } else { + config.allowed_origins.join(", ") + }, + if config.token.is_some() { + "required" + } else { + "none" + }, + ); + if !listen.starts_with("127.") && !listen.starts_with("localhost") { + eprintln!( + "warning: {listen} is not loopback. This API has no authentication by default and \ + reveals which models this node runs." + ); + } + serve(listener, config) +} + +fn serve(listener: TcpListener, config: Config) -> Result<()> { + let config = std::sync::Arc::new(config); + for incoming in listener.incoming() { + let stream = match incoming { + Ok(stream) => stream, + Err(error) => { + eprintln!("api accept failed: {error}"); + continue; + } + }; + let config = config.clone(); + thread::spawn(move || { + if let Err(error) = handle(stream, &config) { + eprintln!("api request failed: {error:#}"); + } + }); + } + Ok(()) +} + +struct Request { + method: String, + path: String, + origin: Option, + authorization: Option, +} + +/// Read the request line and headers. The body is ignored: every route is a GET. +fn read_request(stream: &TcpStream) -> Result> { + let mut reader = BufReader::new(stream); + let mut head = String::new(); + let mut total = 0usize; + + loop { + let mut line = String::new(); + let n = reader.read_line(&mut line)?; + if n == 0 { + return Ok(None); // client hung up + } + total += n; + if total > MAX_HEAD_BYTES { + return Ok(None); + } + if line == "\r\n" || line == "\n" { + break; + } + head.push_str(&line); + } + + let mut lines = head.lines(); + let Some(request_line) = lines.next() else { + return Ok(None); + }; + let mut parts = request_line.split_whitespace(); + let (Some(method), Some(target)) = (parts.next(), parts.next()) else { + return Ok(None); + }; + + let mut origin = None; + let mut authorization = None; + for line in lines { + let Some((name, value)) = line.split_once(':') else { + continue; + }; + let value = value.trim().to_string(); + match name.trim().to_ascii_lowercase().as_str() { + "origin" => origin = Some(value), + "authorization" => authorization = Some(value), + _ => {} + } + } + + Ok(Some(Request { + method: method.to_string(), + // Query strings are not used by any route; dropping one keeps routing exact. + path: target.split('?').next().unwrap_or("/").to_string(), + origin, + authorization, + })) +} + +/// Constant-time comparison so a token cannot be recovered a byte at a time from response timing. +fn token_ok(expected: &str, supplied: Option<&String>) -> bool { + let Some(supplied) = supplied.and_then(|v| v.strip_prefix("Bearer ")) else { + return false; + }; + let a = expected.as_bytes(); + let b = supplied.as_bytes(); + // Length is compared without branching on it beyond the final AND. + let mut diff = (a.len() ^ b.len()) as u8; + for i in 0..a.len().max(b.len()) { + diff |= a.get(i).copied().unwrap_or(0) ^ b.get(i).copied().unwrap_or(0); + } + diff == 0 +} + +fn handle(mut stream: TcpStream, config: &Config) -> Result<()> { + stream.set_read_timeout(Some(READ_TIMEOUT))?; + stream.set_write_timeout(Some(READ_TIMEOUT))?; + + let Some(request) = read_request(&stream)? else { + return Ok(()); + }; + + // Echo the origin only when it is on the allowlist. Never `*`: this API describes the + // machine it runs on, so any-origin access means any page can fingerprint the node. + let allow_origin = request + .origin + .as_ref() + .filter(|o| config.allowed_origins.iter().any(|a| a == *o)) + .cloned(); + + if request.method == "OPTIONS" { + return write_response(&mut stream, 204, "", allow_origin.as_deref(), true); + } + + if let Some(expected) = &config.token { + if !token_ok(expected, request.authorization.as_ref()) { + return write_json( + &mut stream, + 401, + r#"{"error":"unauthorized"}"#, + allow_origin.as_deref(), + ); + } + } + + if request.method != "GET" { + return write_json( + &mut stream, + 405, + r#"{"error":"this API is read-only"}"#, + allow_origin.as_deref(), + ); + } + + let (status, body) = route(&request.path, &config.root); + write_json(&mut stream, status, &body, allow_origin.as_deref()) +} + +fn route(path: &str, root: &Path) -> (u16, String) { + let rendered = match path { + "/v1/health" => Ok(r#"{"ok":true,"service":"lumbridge-compute","api":"v1"}"#.to_string()), + "/v1/status" => collect_status(root).and_then(|r| Ok(serde_json::to_string(&r)?)), + "/v1/models" => collect_models(root).and_then(|r| Ok(serde_json::to_string(&r)?)), + "/v1/scenes" => collect_scenes(root).and_then(|r| Ok(serde_json::to_string(&r)?)), + "/v1/evals" => collect_evals(root).and_then(|r| Ok(serde_json::to_string(&r)?)), + other => match other.strip_prefix("/v1/scenes/") { + // Exactly one segment: /v1/scenes/a/b is not a route. + Some(name) if !name.is_empty() && !name.contains('/') => { + collect_scene(root, name).and_then(|r| Ok(serde_json::to_string(&r)?)) + } + _ => return (404, r#"{"error":"no such route"}"#.to_string()), + }, + }; + + match rendered { + Ok(body) => (200, body), + // A collector fails when the thing does not exist (an unknown Scene) or when the node's + // own config is unreadable. The message is the operator's, and this is a loopback API, + // so passing it through is more useful than flattening it to "error". + Err(error) => ( + 404, + serde_json::json!({ "error": format!("{error:#}") }).to_string(), + ), + } +} + +fn write_json(stream: &mut TcpStream, status: u16, body: &str, origin: Option<&str>) -> Result<()> { + write_response(stream, status, body, origin, false) +} + +fn write_response( + stream: &mut TcpStream, + status: u16, + body: &str, + origin: Option<&str>, + preflight: bool, +) -> Result<()> { + let reason = match status { + 200 => "OK", + 204 => "No Content", + 401 => "Unauthorized", + 404 => "Not Found", + 405 => "Method Not Allowed", + _ => "Error", + }; + let mut head = format!("HTTP/1.1 {status} {reason}\r\n"); + head.push_str("Content-Type: application/json\r\n"); + head.push_str(&format!("Content-Length: {}\r\n", body.len())); + // This is live node state; a cached answer is a wrong answer. + head.push_str("Cache-Control: no-store\r\n"); + head.push_str("Connection: close\r\n"); + if let Some(origin) = origin { + head.push_str(&format!("Access-Control-Allow-Origin: {origin}\r\n")); + // Tell caches the body varies by origin, so an allowed origin's response can never be + // replayed to a disallowed one. + head.push_str("Vary: Origin\r\n"); + if preflight { + head.push_str("Access-Control-Allow-Methods: GET, OPTIONS\r\n"); + head.push_str("Access-Control-Allow-Headers: Authorization\r\n"); + head.push_str("Access-Control-Max-Age: 600\r\n"); + } + } + head.push_str("\r\n"); + stream.write_all(head.as_bytes())?; + stream.write_all(body.as_bytes())?; + stream.flush()?; + Ok(()) +} + +/// Drain and discard — kept for symmetry with future routes that accept a body. +#[allow(dead_code)] +fn discard_body(reader: &mut impl Read) { + let mut sink = Vec::new(); + let _ = reader.read_to_end(&mut sink); +} + +#[cfg(test)] +mod tests { + use super::*; + + #[test] + fn token_comparison_rejects_wrong_and_missing_and_prefixless() { + let t = "s3cret-token"; + assert!(token_ok(t, Some(&format!("Bearer {t}")))); + assert!(!token_ok(t, None)); + assert!(!token_ok(t, Some(&t.to_string()))); // no "Bearer " prefix + assert!(!token_ok(t, Some(&"Bearer wrong".to_string()))); + // A correct prefix must not pass — this is the bug constant-time comparison exists for. + assert!(!token_ok(t, Some(&"Bearer s3cret".to_string()))); + assert!(!token_ok(t, Some(&"Bearer s3cret-token-plus".to_string()))); + } + + #[test] + fn unknown_routes_404_and_scene_paths_take_exactly_one_segment() { + let root = Path::new("/nonexistent-root-for-routing-test"); + assert_eq!(route("/v1/nope", root).0, 404); + assert_eq!(route("/v1/scenes/a/b", root).0, 404); + assert_eq!(route("/v1/scenes/", root).0, 404); + // Health needs no filesystem, so it answers even on a bogus root. + assert_eq!(route("/v1/health", root).0, 200); + } + + #[test] + fn health_body_is_valid_json() { + let (status, body) = route("/v1/health", Path::new("/tmp")); + assert_eq!(status, 200); + let parsed: serde_json::Value = serde_json::from_str(&body).unwrap(); + assert_eq!(parsed["ok"], true); + } +} diff --git a/src/lifecycle.rs b/src/lifecycle.rs new file mode 100644 index 0000000..fd92cd1 --- /dev/null +++ b/src/lifecycle.rs @@ -0,0 +1,689 @@ +//! Transactional Scene lifecycle and persisted desired-state recovery. + +use anyhow::{bail, Context, Result}; +use std::collections::{BTreeMap, HashSet}; +use std::fs::{self, File, OpenOptions}; +use std::os::fd::AsRawFd; +use std::path::Path; +use std::time::Duration; + +use crate::config::{find_scene, Model, Registry, Scene}; +use crate::governor; +use crate::mem; +use crate::proc::{self, Proc, State}; + +/// What activating a Scene would do, decided before anything is mutated. +/// +/// `activate` renders this for the CLI and the MCP server returns it verbatim, +/// so a plan an operator reads and a plan an agent reads can never drift apart. +#[derive(Debug, Clone)] +pub struct Plan { + pub scene: String, + pub budget_gb: f64, + /// Registered models serving outside the target Scene; stopped first. + pub stop: Vec, + /// Scene models not yet serving, in the order they would be admitted. + pub start: Vec, +} + +pub struct TransitionLock { + file: File, +} + +impl TransitionLock { + pub fn acquire(root: &Path) -> Result { + let dir = root.join(".kuda"); + fs::create_dir_all(&dir)?; + let path = dir.join("transition.lock"); + let file = OpenOptions::new() + .create(true) + .truncate(false) + .read(true) + .write(true) + .open(&path) + .with_context(|| format!("opening transition lock {}", path.display()))?; + let result = unsafe { libc::flock(file.as_raw_fd(), libc::LOCK_EX | libc::LOCK_NB) }; + if result != 0 { + return Err(std::io::Error::last_os_error()) + .context("another Scene transition is already running; wait for it to finish"); + } + Ok(Self { file }) + } +} + +impl Drop for TransitionLock { + fn drop(&mut self) { + unsafe { + libc::flock(self.file.as_raw_fd(), libc::LOCK_UN); + } + } +} + +pub fn adopt(root: &Path, name: &str) -> Result<()> { + let _lock = TransitionLock::acquire(root)?; + let registry = Registry::load(root)?; + let scene = find_scene(root, name)?; + validate_scene(®istry, &scene)?; + + let target: HashSet<&str> = scene.models.iter().map(String::as_str).collect(); + let running = governor::running_ids(®istry); + let extras: Vec = running + .iter() + .filter(|id| !target.contains(id.as_str())) + .cloned() + .collect(); + if !extras.is_empty() { + bail!( + "cannot adopt '{name}': registered model(s) outside the Scene are serving: {}", + extras.join(", ") + ); + } + + let previous = State::load_checked(root)?; + let mut adopted = BTreeMap::new(); + for id in &scene.models { + let model = ®istry.models[id]; + if !governor::is_running(model) { + bail!("cannot adopt '{name}': exact model '{id}' is not healthy"); + } + let legacy = previous.procs.get(id).with_context(|| { + format!( + "cannot adopt '{name}': no legacy process record for '{id}'; start it through Compute" + ) + })?; + let captured = Proc::capture(legacy.pid, legacy.seq, model.serve.port) + .with_context(|| format!("adopting '{id}' pid {}", legacy.pid))?; + adopted.insert(id.clone(), captured); + } + + let mut state = previous; + state.procs = adopted; + state.desired_scene = Some(name.to_string()); + state.active_scene = Some(name.to_string()); + state.last_known_good_scene = Some(name.to_string()); + state.transition_scene = None; + state.last_error = None; + state.save(root)?; + println!("adopted exact running Scene '{name}' and captured process identities"); + Ok(()) +} + +pub fn activate(root: &Path, name: &str, dry_run: bool) -> Result<()> { + let _lock = TransitionLock::acquire(root)?; + let prior = State::load_checked(root)?; + let prior_active = prior.active_scene.clone(); + + if dry_run { + return activate_once(root, name, true); + } + + match activate_once(root, name, false) { + Ok(()) => { + let mut state = State::load_checked(root)?; + if prior_active.as_deref() != Some(name) { + if let Some(previous) = prior_active { + state.last_known_good_scene = Some(previous); + } + } + state.desired_scene = Some(name.to_string()); + state.active_scene = Some(name.to_string()); + if state.last_known_good_scene.is_none() { + state.last_known_good_scene = Some(name.to_string()); + } + state.transition_scene = None; + state.last_error = None; + state.save(root)?; + println!("Scene '{name}' is active and persisted as desired"); + Ok(()) + } + Err(target_error) => { + let target_message = format!("activating '{name}' failed: {target_error:#}"); + eprintln!("{target_message}"); + let transition_started = + State::load_checked(root)?.transition_scene.as_deref() == Some(name); + let cleanup_error = if transition_started { + stop_all_owned(root).err() + } else { + None + }; + let rollback = if transition_started && cleanup_error.is_none() { + prior_active + .as_deref() + .filter(|previous| *previous != name) + .map(|previous| (previous.to_string(), activate_once(root, previous, false))) + } else { + None + }; + + let mut state = State::load_checked(root)?; + state.transition_scene = None; + state.last_error = Some(target_message.clone()); + match rollback { + Some((previous, Ok(()))) => { + state.desired_scene = Some(previous.clone()); + state.active_scene = Some(previous.clone()); + if state.last_known_good_scene.is_none() { + state.last_known_good_scene = Some(previous.clone()); + } + state.save(root)?; + eprintln!("rolled back to Scene '{previous}'"); + bail!("{target_message}; rolled back to '{previous}'") + } + Some((previous, Err(rollback_error))) => { + state.active_scene = None; + state.save(root)?; + bail!( + "{target_message}; rollback to '{previous}' also failed: {rollback_error:#}" + ) + } + None if !transition_started => { + state.save(root)?; + bail!("{target_message}") + } + None if cleanup_error.is_none() => { + state.active_scene = None; + state.save(root)?; + bail!("{target_message}") + } + None => { + state.active_scene = None; + state.save(root)?; + let cleanup_error = cleanup_error.expect("guarded by match condition"); + bail!("{target_message}; cleanup also failed: {cleanup_error:#}") + } + } + } + } +} + +fn stop_all_owned(root: &Path) -> Result<()> { + let mut state = State::load_checked(root)?; + let owned: Vec<(String, Proc)> = state + .procs + .iter() + .filter(|(_, process)| process.owned_alive()) + .map(|(id, process)| (id.clone(), process.clone())) + .collect(); + for (id, process) in owned { + proc::stop_owned(&process).with_context(|| format!("cleaning up '{id}'"))?; + state.procs.remove(&id); + state.save(root)?; + } + Ok(()) +} + +pub fn resume(root: &Path) -> Result<()> { + let state = State::load_checked(root)?; + let desired = state + .desired_scene + .clone() + .or_else(|| state.last_known_good_scene.clone()) + .context("no desired Scene is persisted; activate or adopt one first")?; + let fallback = state.last_known_good_scene.clone(); + + match activate(root, &desired, false) { + Ok(()) => Ok(()), + Err(desired_error) => { + let Some(fallback) = fallback.filter(|fallback| fallback != &desired) else { + return Err(desired_error).context("resuming desired Scene"); + }; + eprintln!( + "desired Scene '{desired}' did not resume; trying last-known-good '{fallback}'" + ); + activate(root, &fallback, false).with_context(|| { + format!( + "desired Scene '{desired}' failed ({desired_error:#}) and fallback '{fallback}' failed" + ) + }) + } + } +} + +pub fn deactivate(root: &Path) -> Result<()> { + let _lock = TransitionLock::acquire(root)?; + let mut state = State::load_checked(root)?; + let ids: Vec = state.procs.keys().cloned().collect(); + for id in ids { + let process = state.procs[&id].clone(); + if process.owned_alive() { + println!(" stopping {id} (pid {})", process.pid); + proc::stop_owned(&process)?; + } + state.procs.remove(&id); + state.save(root)?; + } + state.desired_scene = None; + state.active_scene = None; + state.transition_scene = None; + state.last_error = None; + state.save(root)?; + println!("all Compute-managed models stopped; no Scene is desired"); + Ok(()) +} + +/// Diff the target Scene against what is actually serving. Pure: it decides +/// *what* would change, never *whether* the change is allowed. +fn plan_transition(registry: &Registry, scene: &Scene) -> Plan { + let target: HashSet<&str> = scene.models.iter().map(String::as_str).collect(); + let running = governor::running_ids(registry); + let stop: Vec = running + .iter() + .filter(|id| !target.contains(id.as_str())) + .cloned() + .collect(); + let mut start: Vec = scene + .models + .iter() + .filter(|id| !governor::is_running(®istry.models[*id])) + .cloned() + .collect(); + let listed = scene + .activation + .as_ref() + .and_then(|activation| activation.order.as_deref()) + .map(|order| order == "listed") + .unwrap_or(false); + if !listed { + start.sort_by(|a, b| { + registry.models[a] + .footprint_gb + .partial_cmp(®istry.models[b].footprint_gb) + .unwrap() + }); + } + Plan { + scene: scene.metadata.name.clone(), + budget_gb: scene.budget_gb.unwrap_or(governor::DEFAULT_BUDGET_GB), + stop, + start, + } +} + +/// Everything that must hold before the first process is signalled. Runs to +/// completion with nothing mutated, so a rejection here leaves the currently +/// active Scene exactly as it was. +fn preflight(registry: &Registry, scene: &Scene, plan: &Plan, state: &State) -> Result<()> { + for id in &scene.models { + if governor::is_running(®istry.models[id]) { + let process = state.procs.get(id).with_context(|| { + format!( + "'{id}' is already serving but is not identity-owned by Compute; adopt the active Scene first" + ) + })?; + if !process.owned_alive() { + bail!( + "ownership record for serving model '{id}' is stale; adopt the active Scene first" + ); + } + } + } + + for id in &plan.stop { + let process = state.procs.get(id).with_context(|| { + format!( + "'{id}' is serving but is not identity-owned by Compute; adopt the active Scene before switching" + ) + })?; + if !process.owned_alive() { + bail!("ownership record for serving model '{id}' is stale; refusing to signal its pid"); + } + } + for id in &plan.start { + let model = ®istry.models[id]; + if let Some(port) = model.serve.port { + // A model in `plan.stop` may currently hold this port. Every stop runs before + // any start, so that is a handoff, not a conflict. Without this exemption every + // same-port swap is rejected — including brain -> brain-laguna/brain-gemma, + // which share :8001 by design because the alias downstream agents call must + // survive a weight swap. + let freed_by_stop = plan.stop.iter().any(|stopping| { + registry + .models + .get(stopping) + .and_then(|stopped| stopped.serve.port) + == Some(port) + }); + if !freed_by_stop && governor::port_open(port) && !governor::is_running(model) { + bail!("port {port} is occupied by a different model; refusing to start '{id}'"); + } + } + } + Ok(()) +} + +/// `scene activate --dry-run` as data rather than as printed lines: the same +/// validation, the same plan, nothing written. Callers that need the plan +/// programmatically use this instead of scraping stdout. +pub fn plan(root: &Path, name: &str) -> Result { + let _lock = TransitionLock::acquire(root)?; + let registry = Registry::load(root)?; + let scene = find_scene(root, name)?; + validate_scene(®istry, &scene)?; + let plan = plan_transition(®istry, &scene); + let mut state = State::load_checked(root)?; + state.procs.retain(|_, process| process.owned_alive()); + preflight(®istry, &scene, &plan, &state)?; + Ok(plan) +} + +fn activate_once(root: &Path, name: &str, dry_run: bool) -> Result<()> { + let registry = Registry::load(root)?; + let scene = find_scene(root, name)?; + validate_scene(®istry, &scene)?; + let plan = plan_transition(®istry, &scene); + + println!("activate '{name}' (budget {:.0} GB)", plan.budget_gb); + println!(" stop : {}", format_ids(&plan.stop)); + println!(" start: {}", format_ids(&plan.start)); + + let mut state = State::load_checked(root)?; + state.procs.retain(|_, process| process.owned_alive()); + preflight(®istry, &scene, &plan, &state)?; + + if dry_run { + println!(" dry run: validation passed; nothing changed"); + return Ok(()); + } + + state.transition_scene = Some(name.to_string()); + state.save(root)?; + + for id in &plan.stop { + let process = state.procs[id].clone(); + println!(" stopping {id} (pid {})", process.pid); + proc::stop_owned(&process)?; + state.procs.remove(id); + state.save(root)?; + } + + let mut committed: f64 = scene + .models + .iter() + .filter(|id| governor::is_running(®istry.models[*id])) + .map(|id| registry.models[id].footprint_gb) + .sum(); + let wait_healthy = scene + .activation + .as_ref() + .and_then(|activation| activation.wait_healthy) + .unwrap_or(true); + + for id in &plan.start { + let model: &Model = ®istry.models[id]; + // Re-read the pool before every start rather than once per activation: each model + // that comes up consumes real memory, and its true appetite is only knowable after + // it has allocated. A footprint that was optimistic shows up here, on the next + // model, instead of taking the box down. + let available_gb = mem::read().ok().map(|m| m.available_gb); + if !governor::can_admit(model.footprint_gb, committed, plan.budget_gb, available_gb) { + match available_gb { + Some(available) => bail!( + "'{id}' ({:.0} GB) refused: {:.0} GB committed against a {:.0} GB budget, \ + {:.1} GB actually available, {:.0} GB margin required", + model.footprint_gb, + committed, + plan.budget_gb, + available, + governor::SAFETY_MARGIN_GB + ), + None => bail!( + "'{id}' would exceed the {:.0} GB Scene budget with the safety margin", + plan.budget_gb + ), + } + } + let pid = proc::spawn(root, id, model)?; + state.seq += 1; + let process = Proc::capture(pid, state.seq, model.serve.port) + .with_context(|| format!("capturing ownership for newly started '{id}'"))?; + state.procs.insert(id.clone(), process.clone()); + state.save(root)?; + committed += model.footprint_gb; + println!(" started {id} (pid {pid}); waiting for exact health"); + if wait_healthy && !governor::wait_healthy(model, health_timeout()) { + let _ = proc::stop_owned(&process); + state.procs.remove(id); + state.save(root)?; + bail!("'{id}' did not report its exact health marker before timeout"); + } + } + + let unhealthy: Vec = scene + .models + .iter() + .filter(|id| !governor::is_running(®istry.models[*id])) + .cloned() + .collect(); + if !unhealthy.is_empty() { + bail!( + "Scene '{name}' is incomplete; exact health failed for: {}", + unhealthy.join(", ") + ); + } + Ok(()) +} + +fn validate_scene(registry: &Registry, scene: &Scene) -> Result<()> { + let missing: Vec<&String> = scene + .models + .iter() + .filter(|id| !registry.models.contains_key(*id)) + .collect(); + if !missing.is_empty() { + bail!( + "Scene '{}' references unknown model id(s): {}", + scene.metadata.name, + missing + .iter() + .map(|id| id.as_str()) + .collect::>() + .join(", ") + ); + } + let budget = scene.budget_gb.unwrap_or(governor::DEFAULT_BUDGET_GB); + let footprint: f64 = scene + .models + .iter() + .map(|id| registry.models[id].footprint_gb) + .sum(); + if footprint + governor::SAFETY_MARGIN_GB > budget { + bail!( + "Scene '{}' needs {:.1} GB including safety margin, above its {:.1} GB budget", + scene.metadata.name, + footprint + governor::SAFETY_MARGIN_GB, + budget + ); + } + Ok(()) +} + +fn health_timeout() -> Duration { + Duration::from_secs(if cfg!(test) { 5 } else { 900 }) +} + +fn format_ids(ids: &[String]) -> String { + if ids.is_empty() { + "(none)".to_string() + } else { + ids.join(", ") + } +} + +#[cfg(test)] +mod tests { + use super::*; + use std::net::TcpListener; + use std::path::PathBuf; + use std::time::{SystemTime, UNIX_EPOCH}; + + fn fixture_root() -> (PathBuf, u16) { + let unique = SystemTime::now() + .duration_since(UNIX_EPOCH) + .unwrap() + .as_nanos(); + let root = std::env::temp_dir().join(format!("lumbridge-compute-{unique}")); + fs::create_dir_all(root.join("registry")).unwrap(); + fs::create_dir_all(root.join("scenes")).unwrap(); + let listener = TcpListener::bind("127.0.0.1:0").unwrap(); + let port = listener.local_addr().unwrap().port(); + drop(listener); + let bad_listener = TcpListener::bind("127.0.0.1:0").unwrap(); + let bad_port = bad_listener.local_addr().unwrap().port(); + drop(bad_listener); + let registry = format!( + "apiVersion: lumbridge/v1\nmodels:\n fake:\n name: Fake\n footprint_gb: 1\n health: http://localhost:{port}/\n serve:\n kind: exec\n port: {port}\n command: [/usr/bin/python3, -m, http.server, '{port}', --bind, 127.0.0.1]\n bad:\n name: Bad\n footprint_gb: 2\n health: http://localhost:{bad_port}/\n serve:\n kind: exec\n port: {bad_port}\n command: [/usr/bin/false]\n" + ); + fs::write(root.join("registry/models.yaml"), registry).unwrap(); + fs::write( + root.join("scenes/test.scene.yaml"), + "apiVersion: lumbridge/v1\nmetadata:\n name: test\n version: 1\nmodels: [fake]\nbudget_gb: 100\n", + ) + .unwrap(); + (root, port) + } + + #[test] + fn activation_persists_and_deactivation_stops_owned_process() { + let (root, _port) = fixture_root(); + activate(&root, "test", false).unwrap(); + let state = State::load_checked(&root).unwrap(); + assert_eq!(state.desired_scene.as_deref(), Some("test")); + assert_eq!(state.active_scene.as_deref(), Some("test")); + assert!(state.procs["fake"].owned_alive()); + deactivate(&root).unwrap(); + assert!(State::load_checked(&root).unwrap().procs.is_empty()); + fs::remove_dir_all(root).unwrap(); + } + + /// Two models sharing one port, distinguishable by `health_contains` — the + /// brain/brain-laguna shape. Each serves its own directory so the health probe + /// can tell which one is actually up. + fn same_port_root() -> PathBuf { + let unique = SystemTime::now() + .duration_since(UNIX_EPOCH) + .unwrap() + .as_nanos(); + let root = std::env::temp_dir().join(format!("lumbridge-compute-swap-{unique}")); + fs::create_dir_all(root.join("registry")).unwrap(); + fs::create_dir_all(root.join("scenes")).unwrap(); + let dir_a = root.join("srv-alpha"); + let dir_b = root.join("srv-beta"); + fs::create_dir_all(&dir_a).unwrap(); + fs::create_dir_all(&dir_b).unwrap(); + fs::write(dir_a.join("alpha-marker.txt"), "a").unwrap(); + fs::write(dir_b.join("beta-marker.txt"), "b").unwrap(); + let listener = TcpListener::bind("127.0.0.1:0").unwrap(); + let port = listener.local_addr().unwrap().port(); + drop(listener); + let (a, b) = (dir_a.display(), dir_b.display()); + let registry = format!( + "apiVersion: lumbridge/v1\nmodels:\n alpha:\n name: Alpha\n footprint_gb: 1\n health: http://localhost:{port}/\n health_contains: alpha-marker\n serve:\n kind: exec\n port: {port}\n command: [/usr/bin/python3, -m, http.server, '{port}', --bind, 127.0.0.1, --directory, '{a}']\n beta:\n name: Beta\n footprint_gb: 1\n health: http://localhost:{port}/\n health_contains: beta-marker\n serve:\n kind: exec\n port: {port}\n command: [/usr/bin/python3, -m, http.server, '{port}', --bind, 127.0.0.1, --directory, '{b}']\n" + ); + fs::write(root.join("registry/models.yaml"), registry).unwrap(); + fs::write( + root.join("scenes/a.scene.yaml"), + "apiVersion: lumbridge/v1\nmetadata:\n name: a\n version: 1\nmodels: [alpha]\nbudget_gb: 100\n", + ) + .unwrap(); + fs::write( + root.join("scenes/b.scene.yaml"), + "apiVersion: lumbridge/v1\nmetadata:\n name: b\n version: 1\nmodels: [beta]\nbudget_gb: 100\n", + ) + .unwrap(); + root + } + + #[test] + fn same_port_swap_is_allowed_when_the_occupant_is_being_stopped() { + let root = same_port_root(); + activate(&root, "a", false).unwrap(); + assert!(State::load_checked(&root).unwrap().procs.contains_key("alpha")); + + // Regression: this used to fail with "port N is occupied by a different model; + // refusing to start 'beta'". The pre-flight port check ran over `plan.start` + // without exempting ports released by `plan.stop`, so every same-port swap was + // rejected even though stops precede starts. + activate(&root, "b", false).unwrap(); + + let state = State::load_checked(&root).unwrap(); + assert_eq!(state.active_scene.as_deref(), Some("b")); + assert!(state.procs.contains_key("beta")); + assert!(!state.procs.contains_key("alpha")); + + deactivate(&root).unwrap(); + fs::remove_dir_all(root).unwrap(); + } + + #[test] + fn already_serving_scene_requires_explicit_adoption() { + let (root, port) = fixture_root(); + let registry = Registry::load(&root).unwrap(); + let model = ®istry.models["fake"]; + let pid = proc::spawn(&root, "fake", model).unwrap(); + assert!(governor::wait_healthy(model, Duration::from_secs(5))); + let error = activate(&root, "test", true).unwrap_err().to_string(); + assert!(error.contains("adopt the active Scene")); + let owned = Proc::capture(pid, 1, Some(port)).unwrap(); + proc::stop_owned(&owned).unwrap(); + fs::remove_dir_all(root).unwrap(); + } + + #[test] + fn preflight_rejection_preserves_healthy_active_scene() { + let (root, _port) = fixture_root(); + activate(&root, "test", false).unwrap(); + let before = State::load_checked(&root).unwrap(); + let pid = before.procs["fake"].pid; + fs::write( + root.join("scenes/invalid.scene.yaml"), + "apiVersion: lumbridge/v1\nmetadata:\n name: invalid\n version: 1\nmodels: [missing]\nbudget_gb: 100\n", + ) + .unwrap(); + assert!(activate(&root, "invalid", false).is_err()); + let after = State::load_checked(&root).unwrap(); + assert_eq!(after.active_scene.as_deref(), Some("test")); + assert_eq!(after.desired_scene.as_deref(), Some("test")); + assert_eq!(after.procs["fake"].pid, pid); + assert!(after.procs["fake"].owned_alive()); + deactivate(&root).unwrap(); + fs::remove_dir_all(root).unwrap(); + } + + #[test] + fn failed_activation_cleans_up_partial_scene() { + let (root, port) = fixture_root(); + fs::write( + root.join("scenes/failing.scene.yaml"), + "apiVersion: lumbridge/v1\nmetadata:\n name: failing\n version: 1\nmodels: [fake, bad]\nbudget_gb: 100\n", + ) + .unwrap(); + assert!(activate(&root, "failing", false).is_err()); + let state = State::load_checked(&root).unwrap(); + assert!(state.procs.is_empty()); + assert!(state.active_scene.is_none()); + assert!(!governor::port_open(port)); + fs::remove_dir_all(root).unwrap(); + } + + #[test] + fn checked_state_load_rejects_malformed_yaml() { + let (root, _port) = fixture_root(); + fs::create_dir_all(root.join(".kuda")).unwrap(); + fs::write(root.join(".kuda/state.yaml"), "desired_scene: [").unwrap(); + assert!(State::load_checked(&root).is_err()); + fs::remove_dir_all(root).unwrap(); + } + + #[test] + fn state_write_replaces_complete_yaml_atomically() { + let (root, _port) = fixture_root(); + let state = State { + desired_scene: Some("test".to_string()), + ..State::default() + }; + state.save(&root).unwrap(); + let loaded = State::load_checked(&root).unwrap(); + assert_eq!(loaded.desired_scene.as_deref(), Some("test")); + fs::remove_dir_all(root).unwrap(); + } +} diff --git a/src/main.rs b/src/main.rs new file mode 100644 index 0000000..bb04a22 --- /dev/null +++ b/src/main.rs @@ -0,0 +1,431 @@ +//! Lumbridge Compute — safe AI workload orchestration for accelerator nodes. + +mod agent; +mod config; +mod eval; +mod gateway; +mod governor; +mod http; +mod lifecycle; +mod mcp; +mod mem; +mod proc; + +use anyhow::Result; +use clap::{Parser, Subcommand}; +use std::path::{Path, PathBuf}; +use std::time::Duration; + +use config::{find_scene, load_scenes, Registry, Scene}; +use proc::State; + +#[derive(Parser)] +#[command( + name = "lumbridge-compute", + version, + about = "Lumbridge Compute — safe AI workload orchestration for accelerator nodes." +)] +struct Cli { + /// Root dir containing registry/ and scenes/ (default: $LUMBRIDGE_COMPUTE_ROOT, $KUDA_ROOT, or current dir) + #[arg(long, global = true)] + root: Option, + #[command(subcommand)] + cmd: Cmd, +} + +#[derive(Subcommand)] +enum Cmd { + /// Governor status: memory, budget, running set, headroom + Status, + /// Manage the model registry + Model { + #[command(subcommand)] + cmd: ModelCmd, + }, + /// Manage scenes (bundles of models) + Scene { + #[command(subcommand)] + cmd: SceneCmd, + }, + /// Run reproducible capability and serving-performance evaluations + Eval { + #[command(subcommand)] + cmd: EvalCmd, + }, + /// Run the memory watchdog in the foreground (kills the newest model before OOM-wedge) + Watchdog { + /// Kill the newest model if MemAvailable dips below this many GB + #[arg(long, default_value_t = governor::WATCHDOG_FLOOR_GB)] + floor: f64, + }, + /// Run the stable streaming gateway in the foreground + Gateway { + #[arg(long, default_value = "127.0.0.1:8011")] + listen: String, + #[arg(long, default_value = "127.0.0.1:8001")] + upstream: String, + }, + /// Serve the Governor as a read-only JSON API over HTTP + /// + /// A second transport over the same operations the MCP server exposes, for a web UI. It + /// never mutates: no activation, no stop, no eval run. + Api { + /// Loopback by default. This API has no authentication unless --token is set, and it + /// reveals which models this node runs, so widening the bind is an explicit act. + #[arg(long, default_value = "127.0.0.1:8012")] + listen: String, + /// Browser origin permitted to read this API. Repeatable. Empty means no browser may + /// read it; `*` is deliberately not supported, because any page you visit would then + /// be able to fingerprint this machine. + #[arg(long = "allow-origin")] + allow_origin: Vec, + /// Require `Authorization: Bearer ` on every request. + #[arg(long)] + token: Option, + }, + /// Serve the Governor to AI agents as MCP tools over stdio + Mcp { + /// Let an agent perform a real Scene transition, not just plan one. + /// Off by default: the agent writes its own tool arguments, so the only + /// meaningful gate on a production switch is one the operator sets here. + #[arg(long)] + allow_activate: bool, + }, + /// Run the resident supervisor: resume desired Scene, gateway, and memory floor + Agent { + #[arg(long, default_value = "127.0.0.1:8011")] + listen: String, + #[arg(long, default_value = "127.0.0.1:8001")] + upstream: String, + #[arg(long, default_value_t = governor::WATCHDOG_FLOOR_GB)] + floor: f64, + }, +} + +#[derive(Subcommand)] +enum ModelCmd { + /// List registered models and their live state + Ls, +} + +#[derive(Subcommand)] +enum SceneCmd { + /// List scenes with total footprint + Ls, + /// Show a scene: models, footprints, and the Governor's admission verdict + Show { name: String }, + /// Activate a scene: stop what's not in it, admit + start what is + Activate { + name: String, + /// Print the plan without changing anything + #[arg(long)] + dry_run: bool, + }, + /// Adopt an already-running exact Scene and bind legacy PIDs to process identities + Adopt { name: String }, + /// Resume the persisted desired Scene, falling back to the previous known-good Scene + Resume, + /// Stop all Lumbridge Compute-managed models + Deactivate, +} + +#[derive(Subcommand)] +enum EvalCmd { + /// List available evaluation suites + Ls, + /// Run a suite against an OpenAI-compatible endpoint + Run { + suite: String, + #[arg(long, default_value = "http://127.0.0.1:8001/v1")] + base_url: String, + #[arg(long, default_value = "brain")] + model: String, + /// Override the suite's repetitions per case + #[arg(long)] + repeat: Option, + }, +} + +fn root_dir(cli: &Cli) -> PathBuf { + cli.root + .clone() + .or_else(|| { + std::env::var("LUMBRIDGE_COMPUTE_ROOT") + .ok() + .map(PathBuf::from) + }) + .or_else(|| std::env::var("KUDA_ROOT").ok().map(PathBuf::from)) + .unwrap_or_else(|| PathBuf::from(".")) +} + +fn main() -> Result<()> { + let cli = Cli::parse(); + let root = root_dir(&cli); + match &cli.cmd { + Cmd::Status => cmd_status(&root), + Cmd::Model { cmd } => match cmd { + ModelCmd::Ls => cmd_model_ls(&root), + }, + Cmd::Scene { cmd } => match cmd { + SceneCmd::Ls => cmd_scene_ls(&root), + SceneCmd::Show { name } => cmd_scene_show(&root, name), + SceneCmd::Activate { name, dry_run } => lifecycle::activate(&root, name, *dry_run), + SceneCmd::Adopt { name } => lifecycle::adopt(&root, name), + SceneCmd::Resume => lifecycle::resume(&root), + SceneCmd::Deactivate => lifecycle::deactivate(&root), + }, + Cmd::Eval { cmd } => match cmd { + EvalCmd::Ls => eval::list(&root), + EvalCmd::Run { + suite, + base_url, + model, + repeat, + } => eval::run(&root, suite, base_url, model, *repeat), + }, + Cmd::Watchdog { floor } => cmd_watchdog(&root, *floor), + Cmd::Gateway { listen, upstream } => gateway::run(listen, upstream), + Cmd::Api { + listen, + allow_origin, + token, + } => http::run( + listen, + http::Config { + root: root.clone(), + allowed_origins: allow_origin.clone(), + token: token.clone(), + }, + ), + Cmd::Mcp { allow_activate } => mcp::run(&root, *allow_activate), + Cmd::Agent { + listen, + upstream, + floor, + } => agent::run(&root, listen, upstream, *floor), + } +} + +fn cmd_status(root: &Path) -> Result<()> { + let reg = Registry::load(root)?; + let m = mem::read()?; + let committed = governor::committed_gb(®); + let running = governor::running_ids(®); + let budget = governor::DEFAULT_BUDGET_GB; + // The binding constraint, not the generous one: admission enforces the declared + // budget AND observed memory, so reporting only the declared headroom would promise + // room the next `scene activate` is going to refuse. + let headroom = governor::headroom_gb(committed, budget, Some(m.available_gb)).max(0.0); + let declared_headroom = (budget - committed - governor::SAFETY_MARGIN_GB).max(0.0); + let managed = State::load_checked(root)?; + + println!("Lumbridge Compute · governor"); + println!( + " memory {:.1} GB total · {:.1} GB available", + m.total_gb, m.available_gb + ); + println!( + " budget {:.0} GB (safety margin {:.0} · watchdog floor {:.0})", + budget, + governor::SAFETY_MARGIN_GB, + governor::WATCHDOG_FLOOR_GB + ); + println!( + " committed {committed:.1} GB across {} model(s)", + running.len() + ); + if headroom < declared_headroom { + println!( + " headroom {headroom:.1} GB admittable (budget allows {declared_headroom:.1}; \ + MemAvailable is the tighter limit)" + ); + } else { + println!(" headroom {headroom:.1} GB admittable"); + } + println!(); + println!( + " scene active={} desired={} fallback={}", + managed.active_scene.as_deref().unwrap_or("-"), + managed.desired_scene.as_deref().unwrap_or("-"), + managed.last_known_good_scene.as_deref().unwrap_or("-") + ); + if let Some(error) = &managed.last_error { + println!(" last error {error}"); + } + + if running.is_empty() { + println!(" (no registered models currently serving)"); + } else { + println!(" running:"); + for id in &running { + let mdl = ®.models[id]; + let tag = if managed + .procs + .get(id) + .is_some_and(|process| process.owned_alive()) + { + "compute" + } else { + "ext " + }; + println!( + " ● [{tag}] {:<12} {:>5.0} GB :{:<5} {}", + id, + mdl.footprint_gb, + port_str(mdl.serve.port), + mdl.name + ); + } + } + Ok(()) +} + +fn cmd_model_ls(root: &Path) -> Result<()> { + let reg = Registry::load(root)?; + println!( + "{:<12} {:>6} {:<6} {:<6} MODEL", + "ID", "GB", "STATE", "PORT" + ); + for (id, m) in ®.models { + println!( + "{:<12} {:>6.0} {:<6} {:<6} {}", + id, + m.footprint_gb, + if governor::is_running(m) { + "up" + } else { + "down" + }, + port_str(m.serve.port), + m.name + ); + } + Ok(()) +} + +fn cmd_scene_ls(root: &Path) -> Result<()> { + let reg = Registry::load(root)?; + let scenes = load_scenes(root)?; + if scenes.is_empty() { + println!("no scenes in {}/scenes", root.display()); + return Ok(()); + } + println!("{:<12} {:>6} {:<30} MODELS", "SCENE", "GB", "DESCRIPTION"); + for s in &scenes { + let total = scene_footprint(s, ®); + println!( + "{:<12} {:>6.0} {:<30} {}", + s.metadata.name, + total, + truncate(&s.metadata.description, 30), + s.models.join(", ") + ); + } + Ok(()) +} + +fn cmd_scene_show(root: &Path, name: &str) -> Result<()> { + let reg = Registry::load(root)?; + let scene = find_scene(root, name)?; + let budget = scene.budget_gb.unwrap_or(governor::DEFAULT_BUDGET_GB); + + println!( + "scene {} (v{})", + scene.metadata.name, scene.metadata.version + ); + if !scene.metadata.description.is_empty() { + println!(" {}", scene.metadata.description); + } + println!(" budget {budget:.0} GB\n models:"); + + let mut total = 0.0; + let mut missing = Vec::new(); + for id in &scene.models { + match reg.models.get(id) { + Some(m) => { + total += m.footprint_gb; + let state = if governor::is_running(m) { + "up" + } else { + "down" + }; + println!( + " {:<12} {:>5.0} GB [{:<4}] {}", + id, m.footprint_gb, state, m.name + ); + } + None => { + missing.push(id.clone()); + println!(" {id:<12} ? [MISSING from registry]"); + } + } + } + + let needed = total + governor::SAFETY_MARGIN_GB; + println!( + "\n total footprint {total:.1} GB (+{:.0} safety = {needed:.1} GB)", + governor::SAFETY_MARGIN_GB + ); + let verdict = if !missing.is_empty() { + format!("✗ {} model(s) missing from registry", missing.len()) + } else if needed <= budget { + format!("✓ fits — {:.1} GB to spare", budget - needed) + } else { + format!("✗ exceeds budget by {:.1} GB", needed - budget) + }; + println!(" admission {verdict}"); + Ok(()) +} + +fn cmd_watchdog(root: &Path, floor: f64) -> Result<()> { + println!( + "Lumbridge Compute watchdog — killing the newest model if MemAvailable < {floor:.1} GB. Ctrl-C to stop." + ); + loop { + let m = mem::read()?; + if m.available_gb < floor { + let mut state = State::load_checked(root)?; + match state.newest_alive() { + Some((id, p)) => { + eprintln!( + "watchdog: MemAvailable {:.1} GB < floor {:.1} — killing newest '{id}' (pid {})", + m.available_gb, floor, p.pid + ); + proc::stop_owned(&p)?; + state.procs.remove(&id); + state.save(root)?; + } + None => eprintln!( + "watchdog: MemAvailable {:.1} GB < floor {:.1} but no Lumbridge Compute-managed model to kill!", + m.available_gb, floor + ), + } + } + std::thread::sleep(Duration::from_secs(1)); + } +} + +// ---- helpers --------------------------------------------------------------- + +fn scene_footprint(s: &Scene, reg: &Registry) -> f64 { + s.models + .iter() + .filter_map(|id| reg.models.get(id)) + .map(|m| m.footprint_gb) + .sum() +} + +fn port_str(p: Option) -> String { + p.map(|p| p.to_string()).unwrap_or_else(|| "-".to_string()) +} + +fn truncate(s: &str, n: usize) -> String { + if s.chars().count() <= n { + s.to_string() + } else { + format!( + "{}…", + s.chars().take(n.saturating_sub(1)).collect::() + ) + } +} diff --git a/src/mcp.rs b/src/mcp.rs new file mode 100644 index 0000000..ba7bd74 --- /dev/null +++ b/src/mcp.rs @@ -0,0 +1,617 @@ +//! MCP server: the Governor's surface, exposed to agents as tools. +//! +//! Agents already drive Compute by shelling out to the CLI and scraping the +//! column-aligned output. That works until a column moves. Speaking MCP means +//! the agent gets the same numbers the Governor reasons about, as data, with a +//! schema attached — and it means the *shape* of what an agent may do becomes +//! something this file decides rather than something `bash` decides. +//! +//! Two deliberate constraints shape everything below. +//! +//! **Read-first.** Every tool here except `scene_activate` is a pure read. +//! Activating a Scene stops every registered model that is not in it, which on +//! this box means taking down whatever is currently serving — a live voice +//! pipeline included. There is no undo an agent can reach for: if the target +//! Scene then fails to come up, recovery depends on rollback that may itself +//! fail. That asymmetry is why `scene adopt`, `scene resume`, and +//! `scene deactivate` are absent entirely; they are operator verbs whose +//! correctness depends on knowing what the box was doing five minutes ago. +//! `scene_activate` is exposed because planning a switch is genuinely the +//! useful thing an agent wants, and it defaults to planning only. +//! +//! **The safety boundary is the operator's, not the agent's.** A `dry_run` +//! argument defaulting to `true` documents intent but guards nothing: the agent +//! writes the arguments, so it can write `false`. The only boundary an agent +//! cannot cross is one set before it connects, so a real transition also +//! requires `lumbridge-compute mcp --allow-activate`, chosen by the human who +//! launched the server. Without that flag `dry_run: false` is refused, and the +//! refusal says so rather than silently planning instead. + +use anyhow::{Context, Result}; +use rmcp::handler::server::router::tool::ToolRouter; +use rmcp::handler::server::wrapper::Parameters; +use rmcp::model::{Implementation, ServerCapabilities, ServerInfo}; +use rmcp::{tool, tool_handler, tool_router, ErrorData, Json, ServerHandler, ServiceExt}; +use schemars::JsonSchema; +use serde::{Deserialize, Serialize}; +use std::os::fd::FromRawFd; +use std::path::{Path, PathBuf}; +use std::sync::Arc; + +use crate::config::{find_scene, load_scenes, Registry}; +use crate::proc::State; +use crate::{eval, governor, lifecycle, mem}; + +pub fn run(root: &Path, allow_activate: bool) -> Result<()> { + let transport_stdout = hand_over_stdout()?; + // The banner has to go to stderr for the same reason everything else does; + // it doubles as confirmation to the operator that the mutating tool is off. + eprintln!( + "Lumbridge Compute MCP server on stdio · root {} · scene activation {}", + root.display(), + if allow_activate { + "ENABLED (--allow-activate)" + } else { + "disabled; plan only" + } + ); + + let server = ComputeMcp::new(root.to_path_buf(), allow_activate); + let runtime = tokio::runtime::Builder::new_current_thread() + .enable_all() + .build() + .context("building the MCP runtime")?; + runtime.block_on(async move { + let transport = ( + tokio::io::stdin(), + tokio::fs::File::from_std(transport_stdout), + ); + let service = server + .serve(transport) + .await + .context("negotiating the MCP stdio session")?; + service.waiting().await.context("serving MCP over stdio")?; + Ok(()) + }) +} + +/// Hand the real stdout to the transport and point fd 1 at stderr. +/// +/// On stdio transport fd 1 *is* the JSON-RPC framing, and this crate reports +/// progress with `println!` throughout — `lifecycle::activate` narrates every +/// stop and start. One such line interleaved into the framing desynchronises +/// the client mid-transition, which is the worst possible moment to lose it. +/// Rather than audit every print (and every future one), move the file +/// descriptor: library output lands on stderr, where operators already read +/// this server's logs, and the protocol gets a channel nothing else can write. +fn hand_over_stdout() -> Result { + let saved = unsafe { libc::dup(libc::STDOUT_FILENO) }; + if saved < 0 { + return Err(std::io::Error::last_os_error()) + .context("duplicating stdout for the MCP transport"); + } + if unsafe { libc::dup2(libc::STDERR_FILENO, libc::STDOUT_FILENO) } < 0 { + let error = std::io::Error::last_os_error(); + unsafe { libc::close(saved) }; + return Err(error).context("redirecting stdout to stderr"); + } + // SAFETY: `saved` is a fresh descriptor from `dup` that nothing else owns. + Ok(unsafe { std::fs::File::from_raw_fd(saved) }) +} + +#[derive(Clone)] +struct ComputeMcp { + root: Arc, + allow_activate: bool, + tool_router: ToolRouter, +} + +#[tool_router] +impl ComputeMcp { + fn new(root: PathBuf, allow_activate: bool) -> Self { + Self { + root: Arc::new(root), + allow_activate, + tool_router: Self::tool_router(), + } + } + + /// Governor status for this node: unified-memory totals, the hard budget + /// and its margins, how much is committed by models that are actually + /// serving, how much is still admittable, the persisted Scene state, and + /// the last transition or watchdog error. Read this before reasoning about + /// whether anything else will fit. + #[tool( + name = "governor_status", + annotations( + title = "Governor status", + read_only_hint = true, + open_world_hint = false + ) + )] + async fn governor_status(&self) -> Result, ErrorData> { + let root = self.root.clone(); + offload(move || collect_status(&root)).await.map(Json) + } + + /// List every model in the node's registry with its declared worst-case + /// footprint, serving port, and whether it is currently serving. Footprints + /// are what admission control is decided against, not observed usage. + #[tool( + name = "model_list", + annotations( + title = "List registered models", + read_only_hint = true, + open_world_hint = false + ) + )] + async fn model_list(&self) -> Result, ErrorData> { + let root = self.root.clone(); + offload(move || collect_models(&root)).await.map(Json) + } + + /// List the Scenes this node can activate, with each one's total footprint + /// and member models. A Scene is a named set of models brought up as a + /// single unit. + #[tool( + name = "scene_list", + annotations(title = "List scenes", read_only_hint = true, open_world_hint = false) + )] + async fn scene_list(&self) -> Result, ErrorData> { + let root = self.root.clone(); + offload(move || collect_scenes(&root)).await.map(Json) + } + + /// Show one Scene: its models, their footprints and live state, and the + /// Governor's admission verdict — whether the Scene fits its budget once + /// the safety margin is added, and by how much it fits or misses. + #[tool( + name = "scene_show", + annotations( + title = "Show a scene and its admission verdict", + read_only_hint = true, + open_world_hint = false + ) + )] + async fn scene_show( + &self, + Parameters(params): Parameters, + ) -> Result, ErrorData> { + let root = self.root.clone(); + offload(move || collect_scene(&root, ¶ms.name)) + .await + .map(Json) + } + + /// List the evaluation suites available on this node, with their versions + /// and case counts. Running a suite is deliberately not exposed: it drives + /// real load against a serving model for an unbounded time. + #[tool( + name = "eval_list", + annotations( + title = "List eval suites", + read_only_hint = true, + open_world_hint = false + ) + )] + async fn eval_list(&self) -> Result, ErrorData> { + let root = self.root.clone(); + offload(move || collect_evals(&root)).await.map(Json) + } + + /// Plan — or, if the operator allowed it, perform — a Scene transition. + /// + /// With `dry_run` true (the default) this runs every check that guards a + /// real transition and returns the models it would stop and start, changing + /// nothing. With `dry_run` false it actually switches the node: models + /// outside the Scene are stopped, which will interrupt anything they serve, + /// and the call blocks until every Scene model reports healthy or the + /// transition rolls back. A real transition additionally requires the + /// server to have been started with `--allow-activate`; without it, + /// `dry_run: false` is refused. Ask a human before setting it. + #[tool( + name = "scene_activate", + annotations( + title = "Activate a scene (plans by default)", + read_only_hint = false, + destructive_hint = true, + idempotent_hint = false, + open_world_hint = false + ) + )] + async fn scene_activate( + &self, + Parameters(params): Parameters, + ) -> Result, ErrorData> { + if !params.dry_run && !self.allow_activate { + return Err(ErrorData::invalid_params( + "this MCP server is running plan-only: a real Scene transition needs an \ + operator to restart it as `lumbridge-compute mcp --allow-activate`. \ + Re-run with dry_run: true to see the plan.", + None, + )); + } + let root = self.root.clone(); + offload(move || activate_scene(&root, ¶ms.name, params.dry_run)) + .await + .map(Json) + } +} + +#[tool_handler(router = self.tool_router)] +impl ServerHandler for ComputeMcp { + fn get_info(&self) -> ServerInfo { + ServerInfo::new(ServerCapabilities::builder().enable_tools().build()) + .with_server_info(Implementation::new( + "lumbridge-compute", + env!("CARGO_PKG_VERSION"), + )) + .with_instructions( + "Lumbridge Compute runs many AI models on one unified-memory box. There is a \ + single memory pool shared by CPU and GPU, so over-committing does not fail \ + gracefully — the machine thrashes and wedges before the OOM killer acts. The \ + Governor prevents that by admitting a model only if its declared footprint \ + plus a safety margin still fits a hard budget.\n\n\ + Start from `governor_status` for what is committed and what is admittable, \ + and `scene_show` for whether a named Scene would be admitted. Everything is \ + read-only except `scene_activate`, which plans by default. Activating a Scene \ + stops every registered model outside it, so treat it as a production change \ + and get a human's agreement before asking for a non-dry run.", + ) + } +} + +// ---- tool parameters ------------------------------------------------------- + +#[derive(Debug, Deserialize, JsonSchema)] +struct SceneNameParams { + /// Scene name, as reported by `scene_list`. + name: String, +} + +#[derive(Debug, Deserialize, JsonSchema)] +struct SceneActivateParams { + /// Scene name, as reported by `scene_list`. + name: String, + /// Validate and report the plan without changing anything. Defaults to + /// true; set it to false only with a human's explicit agreement. + #[serde(default = "yes")] + dry_run: bool, +} + +fn yes() -> bool { + true +} + +// ---- tool results ---------------------------------------------------------- +// +// Lists are wrapped in objects rather than returned bare: MCP structured +// content must be a JSON object, and a named field leaves room to report +// alongside the list later without breaking a client's schema. + +#[derive(Debug, Serialize, JsonSchema)] +pub(crate) struct StatusReport { + memory_total_gb: f64, + memory_available_gb: f64, + budget_gb: f64, + safety_margin_gb: f64, + watchdog_floor_gb: f64, + /// Sum of the footprints of every registered model currently serving. + committed_gb: f64, + /// What a new model could still claim without breaching the safety margin. + headroom_gb: f64, + /// Scene whose exact model health was last verified. + active_scene: Option, + /// Scene the node should return to after a restart. + desired_scene: Option, + /// Previous proven Scene, used if the desired one cannot resume. + last_known_good_scene: Option, + last_error: Option, + running: Vec, +} + +#[derive(Debug, Serialize, JsonSchema)] +struct RunningModel { + id: String, + name: String, + footprint_gb: f64, + port: Option, + /// True when Compute owns this process identity and may signal it. False + /// means the model is serving but was started outside Compute, so a Scene + /// transition will refuse to touch it until it is adopted. + compute_owned: bool, +} + +#[derive(Debug, Serialize, JsonSchema)] +pub(crate) struct ModelList { + models: Vec, +} + +#[derive(Debug, Serialize, JsonSchema)] +struct ModelEntry { + id: String, + name: String, + /// Declared worst-case unified memory once serving, not observed usage. + footprint_gb: f64, + port: Option, + running: bool, +} + +#[derive(Debug, Serialize, JsonSchema)] +pub(crate) struct SceneList { + scenes: Vec, +} + +#[derive(Debug, Serialize, JsonSchema)] +struct SceneEntry { + name: String, + version: u32, + description: String, + /// Total footprint of the Scene's models that exist in the registry. + footprint_gb: f64, + models: Vec, +} + +#[derive(Debug, Serialize, JsonSchema)] +pub(crate) struct SceneDetail { + name: String, + version: u32, + description: String, + budget_gb: f64, + models: Vec, + /// Model ids the Scene references that the registry does not define. + missing_models: Vec, + footprint_gb: f64, + /// Footprint plus the Governor's safety margin — the figure compared + /// against the budget. + required_gb: f64, + /// The Governor's verdict: would this Scene be admitted? + admits: bool, + verdict: String, +} + +#[derive(Debug, Serialize, JsonSchema)] +struct SceneModel { + id: String, + /// Absent when the id is missing from the registry. + name: Option, + footprint_gb: Option, + running: bool, +} + +#[derive(Debug, Serialize, JsonSchema)] +pub(crate) struct EvalList { + suites: Vec, +} + +#[derive(Debug, Serialize, JsonSchema)] +struct EvalSuite { + name: String, + version: u32, + cases: usize, + description: String, +} + +#[derive(Debug, Serialize, JsonSchema)] +struct ActivationReport { + scene: String, + budget_gb: f64, + /// Serving models outside the Scene, which the transition stops first. + stop: Vec, + /// Scene models not yet serving, in the order they would be admitted. + start: Vec, + /// False when this was a plan and the node was left untouched. + applied: bool, +} + +// ---- collectors ------------------------------------------------------------ +// +// These compose the same primitives the CLI prints from — `governor`, `mem`, +// `config`, `proc::State` — rather than parsing the CLI's output. The numbers +// an agent sees are therefore the numbers admission control uses, by +// construction. + +pub(crate) fn collect_status(root: &Path) -> Result { + let registry = Registry::load(root)?; + let memory = mem::read()?; + let committed = governor::committed_gb(®istry); + let managed = State::load_checked(root)?; + let budget = governor::DEFAULT_BUDGET_GB; + + let running = governor::running_ids(®istry) + .into_iter() + .map(|id| { + let model = ®istry.models[&id]; + RunningModel { + name: model.name.clone(), + footprint_gb: model.footprint_gb, + port: model.serve.port, + compute_owned: managed + .procs + .get(&id) + .is_some_and(|process| process.owned_alive()), + id, + } + }) + .collect(); + + Ok(StatusReport { + memory_total_gb: memory.total_gb, + memory_available_gb: memory.available_gb, + budget_gb: budget, + safety_margin_gb: governor::SAFETY_MARGIN_GB, + watchdog_floor_gb: governor::WATCHDOG_FLOOR_GB, + // `+ 0.0` normalises the negative zero an empty sum can produce, which serialises as + // "-0.0" and reads as a bug to anyone consuming this JSON. + committed_gb: committed + 0.0, + // The BINDING constraint, not the declared one. This used to be + // `budget - committed - margin`, which ignores how much memory the box actually has — + // so on a 62 GB machine with a 100 GB budget it reported 92 GB of headroom that the + // next admission would refuse. cmd_status was fixed when admission started consulting + // MemAvailable; this path was missed, which meant every agent driving the node over + // MCP got the optimistic number. + headroom_gb: governor::headroom_gb(committed, budget, Some(memory.available_gb)).max(0.0), + active_scene: managed.active_scene, + desired_scene: managed.desired_scene, + last_known_good_scene: managed.last_known_good_scene, + last_error: managed.last_error, + running, + }) +} + +pub(crate) fn collect_models(root: &Path) -> Result { + let registry = Registry::load(root)?; + Ok(ModelList { + models: registry + .models + .iter() + .map(|(id, model)| ModelEntry { + id: id.clone(), + name: model.name.clone(), + footprint_gb: model.footprint_gb, + port: model.serve.port, + running: governor::is_running(model), + }) + .collect(), + }) +} + +pub(crate) fn collect_scenes(root: &Path) -> Result { + let registry = Registry::load(root)?; + Ok(SceneList { + scenes: load_scenes(root)? + .into_iter() + .map(|scene| SceneEntry { + name: scene.metadata.name, + version: scene.metadata.version, + description: scene.metadata.description, + footprint_gb: scene + .models + .iter() + .filter_map(|id| registry.models.get(id)) + .map(|model| model.footprint_gb) + .sum(), + models: scene.models, + }) + .collect(), + }) +} + +pub(crate) fn collect_scene(root: &Path, name: &str) -> Result { + let registry = Registry::load(root)?; + let scene = find_scene(root, name)?; + let budget = scene.budget_gb.unwrap_or(governor::DEFAULT_BUDGET_GB); + + let mut footprint = 0.0; + let mut missing = Vec::new(); + let mut models = Vec::new(); + for id in &scene.models { + match registry.models.get(id) { + Some(model) => { + footprint += model.footprint_gb; + models.push(SceneModel { + id: id.clone(), + name: Some(model.name.clone()), + footprint_gb: Some(model.footprint_gb), + running: governor::is_running(model), + }); + } + None => { + missing.push(id.clone()); + models.push(SceneModel { + id: id.clone(), + name: None, + footprint_gb: None, + running: false, + }); + } + } + } + + // Same three-way verdict the CLI prints: a missing id is fatal regardless + // of arithmetic, because the Scene cannot be resolved at all. + let required = footprint + governor::SAFETY_MARGIN_GB; + let (admits, verdict) = if !missing.is_empty() { + ( + false, + format!("{} model(s) missing from the registry", missing.len()), + ) + } else if required <= budget { + ( + true, + format!("fits with {:.1} GB to spare", budget - required), + ) + } else { + ( + false, + format!("exceeds the budget by {:.1} GB", required - budget), + ) + }; + + Ok(SceneDetail { + name: scene.metadata.name, + version: scene.metadata.version, + description: scene.metadata.description, + budget_gb: budget, + models, + missing_models: missing, + footprint_gb: footprint, + required_gb: required, + admits, + verdict, + }) +} + +pub(crate) fn collect_evals(root: &Path) -> Result { + Ok(EvalList { + suites: eval::catalogue(root)? + .into_iter() + .map(|suite| EvalSuite { + name: suite.name, + version: suite.version, + cases: suite.cases, + description: suite.description, + }) + .collect(), + }) +} + +fn activate_scene(root: &Path, name: &str, dry_run: bool) -> Result { + // Plan first either way. On a real transition this is the plan we report; + // `activate` re-derives and re-validates its own under the transition lock, + // so the report describes intent and the lock still owns the truth. + let plan = lifecycle::plan(root, name)?; + if !dry_run { + lifecycle::activate(root, name, false)?; + } + Ok(ActivationReport { + scene: plan.scene, + budget_gb: plan.budget_gb, + stop: plan.stop, + start: plan.start, + applied: !dry_run, + }) +} + +/// Run a synchronous Governor call off the transport's thread. +/// +/// Every read here touches `/proc` and probes serving ports with blocking +/// socket timeouts, and a real transition can sit for minutes waiting on model +/// health. Doing that inline would stall the JSON-RPC reader for the duration, +/// so the synchronous core stays on the blocking pool where it belongs. +async fn offload(work: F) -> Result +where + F: FnOnce() -> Result + Send + 'static, + T: Send + 'static, +{ + match tokio::task::spawn_blocking(work).await { + Ok(Ok(value)) => Ok(value), + // `{:#}` keeps anyhow's context chain, which is where the actionable + // half of a Compute error lives ("adopt the active Scene first"). + Ok(Err(error)) => Err(ErrorData::internal_error(format!("{error:#}"), None)), + Err(join) => Err(ErrorData::internal_error( + format!("Compute worker task failed: {join}"), + None, + )), + } +} diff --git a/src/mem.rs b/src/mem.rs new file mode 100644 index 0000000..840c646 --- /dev/null +++ b/src/mem.rs @@ -0,0 +1,89 @@ +//! Unified-memory sensing. On a shared-memory box there's one pool, so `MemAvailable` +//! from /proc/meminfo is the single source of truth the Governor guards. + +use anyhow::{Context, Result}; +use std::fs; + +pub struct MemInfo { + pub total_gb: f64, + pub available_gb: f64, +} + +pub fn read() -> Result { + let s = fs::read_to_string("/proc/meminfo").context("reading /proc/meminfo")?; + Ok(parse_meminfo(&s)) +} + +/// Split out from `read` so the parser is testable without a real /proc. +pub fn parse_meminfo(s: &str) -> MemInfo { + let mut total = 0.0; + let mut available = 0.0; + for line in s.lines() { + if let Some(v) = line.strip_prefix("MemTotal:") { + total = kb_to_gb(v); + } else if let Some(v) = line.strip_prefix("MemAvailable:") { + available = kb_to_gb(v); + } + } + MemInfo { + total_gb: total, + available_gb: available, + } +} + +/// Parse a " 123456 kB" meminfo value into GB. +fn kb_to_gb(v: &str) -> f64 { + v.split_whitespace() + .next() + .and_then(|n| n.parse::().ok()) + .unwrap_or(0.0) + / 1024.0 + / 1024.0 +} + +#[cfg(test)] +mod tests { + use super::*; + + const SPARK: &str = "\ +MemTotal: 127512345 kB +MemFree: 2048000 kB +MemAvailable: 104857600 kB +Buffers: 123456 kB +"; + + #[test] + fn reads_total_and_available_and_ignores_other_fields() { + let m = parse_meminfo(SPARK); + assert!((m.total_gb - 121.6).abs() < 0.1, "total was {}", m.total_gb); + assert!( + (m.available_gb - 100.0).abs() < 0.1, + "available was {}", + m.available_gb + ); + } + + #[test] + fn missing_fields_read_as_zero_rather_than_panicking() { + // A zero here is what makes admission refuse, so an unparseable /proc must not + // look like an empty box with room to spare. + let m = parse_meminfo("SomethingElse: 1 kB\n"); + assert_eq!(m.total_gb, 0.0); + assert_eq!(m.available_gb, 0.0); + } + + #[test] + fn malformed_values_do_not_panic() { + let m = parse_meminfo("MemTotal: not-a-number kB\nMemAvailable:\n"); + assert_eq!(m.total_gb, 0.0); + assert_eq!(m.available_gb, 0.0); + } + + #[test] + fn memavailable_is_not_confused_with_memfree() { + // MemFree is much smaller than MemAvailable on a box with page cache; picking the + // wrong one would make the watchdog fire constantly. + let m = parse_meminfo(SPARK); + assert!(m.available_gb > 50.0); + } +} diff --git a/src/proc.rs b/src/proc.rs new file mode 100644 index 0000000..3a2bde1 --- /dev/null +++ b/src/proc.rs @@ -0,0 +1,470 @@ +//! Process lifecycle: spawn a model in its own process group, track it in a state +//! file, and stop it (SIGTERM → SIGKILL to the whole group). The Governor decides +//! *whether* to start; this module *how*. + +use anyhow::{bail, Context, Result}; +use serde::{Deserialize, Serialize}; +use std::collections::BTreeMap; +use std::fs::{self, File, OpenOptions}; +use std::io::Write; +use std::os::unix::process::CommandExt; +use std::path::{Path, PathBuf}; +use std::process::{self, Command, Stdio}; +use std::time::Duration; + +use crate::config::Model; + +/// One Lumbridge Compute-managed process. `seq` is a monotonic launch counter so the watchdog +/// can always find the *newest* model to sacrifice first. +#[derive(Debug, Clone, Serialize, Deserialize)] +pub struct Proc { + pub pid: i32, + pub seq: u64, + pub port: Option, + /// Linux boot id plus process start ticks bind ownership to one process + /// incarnation, preventing a reused PID from ever being signalled. + #[serde(default)] + pub boot_id: Option, + #[serde(default)] + pub start_time_ticks: Option, +} + +#[derive(Debug, Default, Serialize, Deserialize)] +pub struct State { + #[serde(default)] + pub seq: u64, + #[serde(default)] + pub procs: BTreeMap, + #[serde(default)] + pub desired_scene: Option, + #[serde(default)] + pub active_scene: Option, + /// Previous proven scene used if the desired scene cannot resume. + #[serde(default)] + pub last_known_good_scene: Option, + #[serde(default)] + pub transition_scene: Option, + #[serde(default)] + pub last_error: Option, +} + +fn state_dir(root: &Path) -> PathBuf { + root.join(".kuda") +} + +impl State { + pub fn load_checked(root: &Path) -> Result { + let p = state_dir(root).join("state.yaml"); + match fs::read_to_string(&p) { + Ok(s) => serde_yaml::from_str(&s) + .with_context(|| format!("parsing persisted state {}", p.display())), + Err(error) if error.kind() == std::io::ErrorKind::NotFound => Ok(State::default()), + Err(error) => Err(error).with_context(|| format!("reading {}", p.display())), + } + } + + pub fn save(&self, root: &Path) -> Result<()> { + let dir = state_dir(root); + fs::create_dir_all(&dir)?; + let p = dir.join("state.yaml"); + let tmp = dir.join(format!(".state.yaml.{}.tmp", process::id())); + let mut file = OpenOptions::new() + .create(true) + .truncate(true) + .write(true) + .open(&tmp) + .with_context(|| format!("creating {}", tmp.display()))?; + file.write_all(serde_yaml::to_string(self)?.as_bytes())?; + file.sync_all()?; + fs::rename(&tmp, &p).with_context(|| format!("atomically replacing {}", p.display()))?; + File::open(&dir) + .with_context(|| format!("opening state directory {}", dir.display()))? + .sync_all() + .with_context(|| format!("syncing state directory {}", dir.display()))?; + Ok(()) + } + + /// Newest still-alive managed model id, if any. + pub fn newest_alive(&self) -> Option<(String, Proc)> { + self.procs + .iter() + .filter(|(_, p)| p.owned_alive()) + .max_by_key(|(_, p)| p.seq) + .map(|(id, p)| (id.clone(), p.clone())) + } +} + +#[derive(Debug)] +struct ProcessIdentity { + boot_id: String, + start_time_ticks: u64, + process_group_id: i32, + state: char, +} + +impl Proc { + /// Capture the identity of a process that Lumbridge Compute just spawned or + /// that an operator explicitly adopted from legacy state. + pub fn capture(pid: i32, seq: u64, port: Option) -> Result { + let identity = process_identity(pid)?; + if identity.process_group_id != pid { + bail!( + "refusing process {pid}: process group {} does not equal pid", + identity.process_group_id + ); + } + Ok(Proc { + pid, + seq, + port, + boot_id: Some(identity.boot_id), + start_time_ticks: Some(identity.start_time_ticks), + }) + } + + pub fn owned_alive(&self) -> bool { + self.validate_owned().is_ok() + } + + fn validate_owned(&self) -> Result<()> { + let expected_boot = self + .boot_id + .as_deref() + .context("legacy process record has no boot identity; adopt the active scene first")?; + let expected_start = self + .start_time_ticks + .context("legacy process record has no start identity; adopt the active scene first")?; + let current = process_identity(self.pid)?; + if current.boot_id != expected_boot || current.start_time_ticks != expected_start { + bail!( + "pid {} no longer identifies the process Compute started", + self.pid + ); + } + if current.state == 'Z' { + bail!("pid {} is a zombie awaiting reap", self.pid); + } + if current.process_group_id != self.pid { + bail!( + "pid {} now belongs to process group {}; refusing group signal", + self.pid, + current.process_group_id + ); + } + Ok(()) + } +} + +fn process_identity(pid: i32) -> Result { + let boot_id = fs::read_to_string("/proc/sys/kernel/random/boot_id") + .context("reading Linux boot id")? + .trim() + .to_string(); + let stat_path = format!("/proc/{pid}/stat"); + let stat = fs::read_to_string(&stat_path) + .with_context(|| format!("reading process identity {stat_path}"))?; + let (state, process_group_id, start_time_ticks) = parse_stat_identity(&stat)?; + Ok(ProcessIdentity { + boot_id, + start_time_ticks, + process_group_id, + state, + }) +} + +fn parse_stat_identity(stat: &str) -> Result<(char, i32, u64)> { + // `comm` is parenthesized and may contain spaces, so locate its final `)` + // before indexing the fields that follow it. The remainder starts at field 3. + let close = stat + .rfind(')') + .context("malformed /proc stat: missing process name terminator")?; + let fields: Vec<&str> = stat[close + 1..].split_whitespace().collect(); + let state = fields + .first() + .and_then(|value| value.chars().next()) + .context("malformed /proc stat: missing process state")?; + let process_group_id = fields + .get(2) + .context("malformed /proc stat: missing process group")? + .parse::() + .context("parsing process group id")?; + let start_time_ticks = fields + .get(19) + .context("malformed /proc stat: missing start time")? + .parse::() + .context("parsing process start time")?; + Ok((state, process_group_id, start_time_ticks)) +} + +/// Expand a leading `~/` to `$HOME`. +fn expand(s: &str) -> String { + if let Some(rest) = s.strip_prefix("~/") { + if let Ok(home) = std::env::var("HOME") { + return format!("{home}/{rest}"); + } + } + s.to_string() +} + +/// The fraction of the pool a vLLM model may reserve, derived from its declared +/// footprint rather than typed separately. +/// +/// `footprint_gb` is what the Governor budgets against; `--gpu-memory-utilization` is +/// what actually reserves the memory. Keeping them as two hand-copied numbers means +/// admission control can be arithmetically correct and still wrong about the machine — +/// the registry says a model takes 66 GB while the flag lets it reserve 0.55 of a +/// 121.6 GB pool, which is 67. Deriving one from the other makes the declared footprint +/// the single source of truth. +/// +/// An explicit `gpu-memory-utilization` in `serve.args` always wins; this only fills in +/// the gap. Returns `None` when the pool size is unknown, in which case vLLM's own +/// default applies exactly as before. +fn derived_gpu_memory_utilization(m: &Model, mem_total_gb: Option) -> Option { + if m.serve.args.contains_key("gpu-memory-utilization") { + return None; + } + let total = mem_total_gb?; + if total <= 0.0 || m.footprint_gb <= 0.0 { + return None; + } + let fraction = m.footprint_gb / total; + // Never hand vLLM a fraction that would reserve the whole box. + (fraction > 0.0 && fraction < 0.95).then_some((fraction * 1000.0).round() / 1000.0) +} + +/// `kind`-based builder. argv[0] is the program. +pub fn build_argv(m: &Model, mem_total_gb: Option) -> Result> { + if !m.serve.command.is_empty() { + return Ok(m.serve.command.iter().map(|s| expand(s)).collect()); + } + match m.serve.kind.as_str() { + "vllm" => { + let executable = m + .serve + .executable + .as_deref() + .map(expand) + .unwrap_or_else(|| "vllm".to_string()); + let mut a = vec![executable, "serve".to_string()]; + if let Some(w) = &m.serve.weights { + a.push(expand(w)); + } + if !m.serve.served_name.is_empty() { + a.push("--served-model-name".into()); + a.extend(m.serve.served_name.iter().cloned()); + } + a.push("--host".into()); + a.push("0.0.0.0".into()); + if let Some(p) = m.serve.port { + a.push("--port".into()); + a.push(p.to_string()); + } + if let Some(fraction) = derived_gpu_memory_utilization(m, mem_total_gb) { + a.push("--gpu-memory-utilization".into()); + a.push(format!("{fraction}")); + } + for (k, v) in &m.serve.args { + render_arg(&mut a, k, v); + } + Ok(a) + } + other => bail!( + "model '{}' has no explicit `command` and kind '{}' has no builder yet — \ + add a `command: [...]` to the registry entry", + m.name, + other + ), + } +} + +fn render_arg(out: &mut Vec, k: &str, v: &serde_yaml::Value) { + use serde_yaml::Value; + let flag = format!("--{k}"); + match v { + Value::Bool(true) => out.push(flag), + Value::Bool(false) => {} + Value::String(s) => { + out.push(flag); + out.push(s.clone()); + } + Value::Number(n) => { + out.push(flag); + out.push(n.to_string()); + } + _ => { + out.push(flag); + out.push( + serde_yaml::to_string(v) + .unwrap_or_default() + .trim() + .to_string(), + ); + } + } +} + +/// Spawn `id`'s model detached in its own process group, logs → compatibility path `.kuda/logs/.log`. +/// Returns the child pid (also its process-group id). +pub fn spawn(root: &Path, id: &str, m: &Model) -> Result { + let argv = build_argv(m, crate::mem::read().ok().map(|info| info.total_gb))?; + let logdir = state_dir(root).join("logs"); + fs::create_dir_all(&logdir)?; + let log = File::create(logdir.join(format!("{id}.log")))?; + let errlog = log.try_clone()?; + + let mut cmd = Command::new(&argv[0]); + cmd.args(&argv[1..]) + .stdin(Stdio::null()) + .stdout(Stdio::from(log)) + .stderr(Stdio::from(errlog)) + .process_group(0); // own group → clean group-kill, immune to CLI's signals + for (k, v) in &m.serve.env { + cmd.env(k, expand(v)); + } + let mut child = cmd + .spawn() + .with_context(|| format!("spawning '{id}': {}", argv.join(" ")))?; + let pid = child.id() as i32; + // A resident agent may outlive many model processes. Reap each child when + // it exits so failed runtimes cannot accumulate as zombies under the agent. + std::thread::spawn(move || { + let _ = child.wait(); + }); + Ok(pid) +} + +/// Stop only the exact process group captured in this ownership record. +pub fn stop_owned(proc: &Proc) -> Result<()> { + if !proc.owned_alive() { + return Ok(()); + } + proc.validate_owned()?; + let term = unsafe { libc::kill(-proc.pid, libc::SIGTERM) }; + if term != 0 { + return Err(std::io::Error::last_os_error()) + .with_context(|| format!("sending SIGTERM to owned process group {}", proc.pid)); + } + for _ in 0..60 { + if !proc.owned_alive() { + return Ok(()); + } + std::thread::sleep(Duration::from_millis(100)); + } + proc.validate_owned()?; + let kill = unsafe { libc::kill(-proc.pid, libc::SIGKILL) }; + if kill != 0 { + return Err(std::io::Error::last_os_error()) + .with_context(|| format!("sending SIGKILL to owned process group {}", proc.pid)); + } + for _ in 0..20 { + if !proc.owned_alive() { + return Ok(()); + } + std::thread::sleep(Duration::from_millis(100)); + } + bail!("owned process group {} survived SIGKILL", proc.pid) +} + +#[cfg(test)] +mod tests { + use super::*; + + /// Build a Model the way the registry does — through serde — so these tests exercise + /// the real deserialization path rather than a hand-assembled struct. + fn vllm_model(footprint_gb: f64, extra_args: &str) -> Model { + let yaml = format!( + "name: brain\nfootprint_gb: {footprint_gb}\nserve:\n kind: vllm\n port: 8001\n args:\n max-model-len: 8192\n{extra_args}" + ); + serde_yaml::from_str(&yaml).expect("test model yaml") + } + + #[test] + fn gpu_memory_utilization_is_derived_from_the_declared_footprint() { + // 66 GB of a 121.6 GB pool is 0.543 — not the 0.55 that used to be typed in + // separately, which is the whole point: one number, not two that can drift. + let m = vllm_model(66.0, ""); + assert_eq!(derived_gpu_memory_utilization(&m, Some(121.6)), Some(0.543)); + let argv = build_argv(&m, Some(121.6)).unwrap(); + let i = argv + .iter() + .position(|a| a == "--gpu-memory-utilization") + .unwrap(); + assert_eq!(argv[i + 1], "0.543"); + } + + #[test] + fn an_explicit_flag_in_the_registry_always_wins() { + let m = vllm_model(66.0, " gpu-memory-utilization: 0.8\n"); + assert_eq!(derived_gpu_memory_utilization(&m, Some(121.6)), None); + // ...and it is rendered exactly once, from serve.args. + let argv = build_argv(&m, Some(121.6)).unwrap(); + assert_eq!( + argv.iter() + .filter(|a| *a == "--gpu-memory-utilization") + .count(), + 1 + ); + let i = argv + .iter() + .position(|a| a == "--gpu-memory-utilization") + .unwrap(); + assert_eq!(argv[i + 1], "0.8"); + } + + #[test] + fn unknown_pool_size_leaves_vllms_own_default_alone() { + let m = vllm_model(66.0, ""); + assert_eq!(derived_gpu_memory_utilization(&m, None), None); + assert!(!build_argv(&m, None) + .unwrap() + .iter() + .any(|a| a == "--gpu-memory-utilization")); + } + + #[test] + fn a_footprint_that_would_claim_the_whole_box_is_not_derived() { + // Better to let vLLM apply its own default than to hand it 0.99 and wedge the box. + let m = vllm_model(120.0, ""); + assert_eq!(derived_gpu_memory_utilization(&m, Some(121.6)), None); + } + + #[test] + fn nonsense_inputs_do_not_produce_a_flag() { + assert_eq!( + derived_gpu_memory_utilization(&vllm_model(0.0, ""), Some(121.6)), + None + ); + assert_eq!( + derived_gpu_memory_utilization(&vllm_model(66.0, ""), Some(0.0)), + None + ); + } + + #[test] + fn an_explicit_command_bypasses_the_builder_entirely() { + let mut m = vllm_model(66.0, ""); + m.serve.command = vec!["python".into(), "-m".into(), "server".into()]; + assert_eq!(build_argv(&m, Some(121.6)).unwrap(), m.serve.command); + } + + #[test] + fn proc_stat_parser_handles_spaces_in_process_name() { + let stat = "123 (worker process) S 1 123 123 0 -1 0 0 0 0 0 0 0 0 0 20 0 1 0 4567"; + let (state, pgrp, start) = parse_stat_identity(stat).unwrap(); + assert_eq!(state, 'S'); + assert_eq!(pgrp, 123); + assert_eq!(start, 4567); + } + + #[test] + fn legacy_records_are_never_treated_as_owned() { + let proc = Proc { + pid: std::process::id() as i32, + seq: 1, + port: None, + boot_id: None, + start_time_ticks: None, + }; + assert!(!proc.owned_alive()); + } +} diff --git a/systemd/lumbridge-compute-agent.service b/systemd/lumbridge-compute-agent.service new file mode 100644 index 0000000..9bb2843 --- /dev/null +++ b/systemd/lumbridge-compute-agent.service @@ -0,0 +1,20 @@ +[Unit] +Description=Lumbridge Compute resident Scene supervisor and model gateway +After=network-online.target +Wants=network-online.target + +[Service] +Type=simple +User=lumbridge +Environment=HOME=/var/lib/lumbridge +Environment=LUMBRIDGE_COMPUTE_ROOT=$LUMBRIDGE_COMPUTE_ROOT +ExecStart=/usr/local/bin/lumbridge-compute agent --listen 127.0.0.1:8011 --upstream 127.0.0.1:8001 --floor 3 +Restart=always +RestartSec=2 +# Model process groups are lifecycle-owned by Compute and must survive an agent +# binary restart; the agent will revalidate their boot/start identities on resume. +KillMode=process +TimeoutStopSec=15 + +[Install] +WantedBy=multi-user.target