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@ku0/x-router-rs

v0.1.0

Published

Rust x-router core bindings for high-performance new-api routing.

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Readme

x-router-rs

Rust x-router core + native HTTP service.

Native Node Binding Build

pnpm --filter @ku0/x-router-rs build:rs

Run Rust HTTP Service

pnpm --filter @ku0/x-router-rs serve:rs

Environment variables:

  • X_ROUTER_HOST (default 0.0.0.0)
  • X_ROUTER_PORT (default 4317)
  • X_ROUTER_BASE_PATH (default /v1/x-router)
  • X_ROUTER_METRICS_PATH (default /metrics)
  • X_ROUTER_REQUEST_TIMEOUT_MS (default 5000)
  • X_ROUTER_AUTH_MODE (disabled | optional | required)
  • X_ROUTER_AUTH_STORE_MODE (in-memory | sqlite)
  • X_ROUTER_AUTH_STORE_SQLITE_PATH (default .tmp/x-router-auth.db when sqlite mode)
  • X_ROUTER_API_KEYS (example: tenant-a=key-a|key-b,tenant-b=key-c)
  • X_ROUTER_DISTRIBUTED_LIMITER_MODE (disabled | shadow | enforce)
  • X_ROUTER_DISTRIBUTED_LIMITER_REDIS_URL (example: redis://127.0.0.1:6379/0)
  • X_ROUTER_DISTRIBUTED_LIMITER_KEY_PREFIX (default x-router)
  • X_ROUTER_DISTRIBUTED_LIMITER_FAIL_OPEN (default true)
  • X_ROUTER_DISTRIBUTED_LIMITER_TIMEOUT_MS (default 150)
  • X_ROUTER_DISTRIBUTED_LIMITER_REUSE_CONNECTION (default true)
  • X_ROUTER_DISTRIBUTED_LIMITER_CONNECTION_POOL_SIZE (default 8)
  • X_ROUTER_UPSTREAM_MODE (disabled | prefer-upstream | upstream-only)
  • X_ROUTER_UPSTREAMS (example: core-a@3=http://10.0.0.11:4317,core-b@1=http://10.0.0.12:4317)
  • X_ROUTER_UPSTREAM_TIMEOUT_MS (default 3000)
  • X_ROUTER_UPSTREAM_COOLDOWN_MS (default 15000)
  • X_ROUTER_UPSTREAM_MAX_ATTEMPTS (default 3)
  • X_ROUTER_UPSTREAM_MAX_IN_FLIGHT (default 256)
  • X_ROUTER_UPSTREAM_CIRCUIT_FAILURE_THRESHOLD (default 3)
  • X_ROUTER_UPSTREAM_CIRCUIT_OPEN_MS (default 20000)
  • X_ROUTER_UPSTREAM_RETRY_BUDGET_MAX_TOKENS (default 64)
  • X_ROUTER_UPSTREAM_RETRY_BUDGET_REFILL_PER_SUCCESS (default 0.25)
  • X_ROUTER_UPSTREAM_EWMA_ALPHA (default 0.2)
  • X_ROUTER_UPSTREAM_SELECTION (latency-aware | round-robin | weighted-round-robin | least-loaded | tenant-affinity)
  • X_ROUTER_UPSTREAM_HEALTH_PROBE_ENABLED (default false)
  • X_ROUTER_UPSTREAM_HEALTH_PROBE_INTERVAL_MS (default 15000)
  • X_ROUTER_UPSTREAM_HEALTH_PROBE_AUTO_DISABLE (default true)
  • X_ROUTER_UPSTREAM_HEALTH_PROBE_FAILURE_THRESHOLD (default 3)
  • X_ROUTER_UPSTREAM_HEALTH_PROBE_RECOVER_THRESHOLD (default 2)
  • X_ROUTER_TENANT_DEFAULT_RPM (default 1200)
  • X_ROUTER_TENANT_DEFAULT_BURST (default 600)
  • X_ROUTER_TENANT_DEFAULT_MAX_IN_FLIGHT (default 64)
  • X_ROUTER_TENANT_MAX_TRACKED (default 10000)
  • X_ROUTER_CONTROL_PLANE_IF_MATCH_REQUIRED (default false)
  • X_ROUTER_CONTROL_PLANE_IF_MATCH_HEADER (default x-policy-if-match)
  • X_ROUTER_STATE_PERSISTENCE_PATH (optional; example .tmp/x-router-rs-state.json)
  • X_ROUTER_STATE_PERSISTENCE_AUTO_SAVE (default true)
  • X_ROUTER_COMPAT_ENABLED (default false)
  • X_ROUTER_COMPAT_WS_ENABLED (default true)
  • X_ROUTER_COMPAT_NOT_IMPLEMENTED_MODE (strict | passthrough, default strict)
  • X_ROUTER_COMPAT_MODEL_CACHE_TTL_MS (default 15000)
  • X_ROUTER_COMPAT_MODEL_REFRESH_TIMEOUT_MS (default 2000)
  • X_ROUTER_COMPAT_MODEL_STATIC_JSON (optional JSON fallback model registry)
  • X_ROUTER_COMPAT_MODEL_RATE_LIMIT_MODE (disabled | shadow | enforce, default disabled)
  • X_ROUTER_COMPAT_MODEL_RATE_LIMIT_RPM (default 0, disabled when 0)
  • X_ROUTER_COMPAT_MODEL_RATE_LIMIT_REDIS_URL (optional; defaults to distributed limiter Redis URL when unset)
  • X_ROUTER_COMPAT_MODEL_RATE_LIMIT_REDIS_KEY_PREFIX (default x-router:compat:model-rate)
  • X_ROUTER_COMPAT_MODEL_RATE_LIMIT_REDIS_TIMEOUT_MS (default 150)
  • X_ROUTER_COMPAT_SYSTEM_GUARD_ENABLED (default true)
  • X_ROUTER_COMPAT_SYSTEM_MAX_IN_FLIGHT (default 2000)
  • X_ROUTER_COMPAT_SYSTEM_MAX_BODY_BYTES (default 10485760)
  • X_ROUTER_COMPAT_DECOMPRESS_ENABLED (default true)
  • X_ROUTER_COMPAT_WS_MAX_CONNECTIONS (default 5000)
  • X_ROUTER_COMPAT_WS_IDLE_TIMEOUT_MS (default 60000)
  • X_ROUTER_COMPAT_WS_PING_INTERVAL_MS (default 15000)
  • X_ROUTER_COMPAT_WS_UPSTREAM_CONNECT_TIMEOUT_MS (default 5000)

State loader is backward-compatible with legacy snake_case state documents. Manual control endpoints:

  • POST /v1/x-router/state/save forces snapshot save even when auto-save is disabled.
  • POST /v1/x-router/state/reload reloads and replaces in-memory policy state from file. Control-plane state concurrency:
  • responses include x-policy-state-hash, x-policy-state-revision, x-policy-state-updated-at-ms.
  • GET /v1/x-router/state returns current policy state metadata.
  • mutating control-plane endpoints accept x-policy-if-match: <hash>.
  • mismatch returns 409 XR_STATE_CONFLICT.
  • with X_ROUTER_CONTROL_PLANE_IF_MATCH_REQUIRED=true, missing precondition returns 428 XR_STATE_CONFLICT.

Endpoints

  • GET /health
  • GET /ready
  • GET /metrics
  • GET /metrics/prometheus
  • GET /v1/x-router/capabilities
  • GET /v1/x-router/auth
  • POST /v1/x-router/auth/reload
  • PUT /v1/x-router/auth/keys/:tenantId
  • DELETE /v1/x-router/auth/keys
  • GET /v1/x-router/distributed-limiter
  • GET /v1/x-router/openapi
  • GET /v1/x-router/openapi/compat
  • GET /v1/x-router/upstreams
  • POST /v1/x-router/upstreams/probe
  • PUT /v1/x-router/upstreams/nodes/:nodeId
  • DELETE /v1/x-router/upstreams/nodes/:nodeId
  • POST /v1/x-router/upstreams/nodes/:nodeId
  • POST /v1/x-router/resolve-route
  • POST /v1/x-router/resolve-route-batch
  • POST /v1/x-router/select-channel
  • POST /v1/x-router/affinity-key
  • POST /v1/x-router/apply-overrides
  • POST /v1/x-router/normalize-request
  • POST /v1/x-router/simulate-billing
  • GET /v1/x-router/tenants
  • GET /v1/x-router/tenant-upstreams
  • GET /v1/x-router/state
  • POST /v1/x-router/state/reload
  • POST /v1/x-router/state/save
  • PUT /v1/x-router/tenants/:tenantId/policy
  • DELETE /v1/x-router/tenants/:tenantId/policy
  • PUT /v1/x-router/tenants/:tenantId/services/:serviceId/policy
  • DELETE /v1/x-router/tenants/:tenantId/services/:serviceId/policy
  • PUT /v1/x-router/tenants/:tenantId/upstreams
  • DELETE /v1/x-router/tenants/:tenantId/upstreams
  • PUT /v1/x-router/tenants/:tenantId/services/:serviceId/upstreams
  • DELETE /v1/x-router/tenants/:tenantId/services/:serviceId/upstreams

Compatibility relay surface (when X_ROUTER_COMPAT_ENABLED=true):

  • GET /v1/models
  • GET /v1/models/:model
  • POST /v1/models/*path
  • GET /v1beta/models
  • GET /v1beta/openai/models
  • POST /v1beta/models/*path
  • POST /pg/chat/completions
  • GET /v1/realtime
  • POST /v1/messages
  • POST /v1/completions
  • POST /v1/chat/completions
  • POST /v1/responses
  • POST /v1/responses/compact
  • POST /v1/edits
  • POST /v1/images/generations
  • POST /v1/images/edits
  • POST /v1/images/variations (XR_NOT_IMPLEMENTED in strict mode)
  • POST /v1/embeddings
  • POST /v1/audio/transcriptions
  • POST /v1/audio/translations
  • POST /v1/audio/speech
  • POST /v1/rerank
  • POST /v1/engines/:model/embeddings
  • POST /v1/moderations
  • POST /v1/video/generations
  • GET /v1/video/generations/:taskId
  • POST /v1/videos
  • GET /v1/videos/:taskId
  • GET /v1/videos/:taskId/content
  • POST /v1/videos/:videoId/remix
  • POST /kling/v1/videos/text2video
  • GET /kling/v1/videos/text2video/:taskId
  • POST /kling/v1/videos/image2video
  • GET /kling/v1/videos/image2video/:taskId
  • POST /jimeng
  • /mj/* and /:mode/mj/* (GET/POST)
  • POST /suno/submit/:action
  • POST /suno/fetch
  • GET /suno/fetch/:id
  • /v1/files*, /v1/fine-tunes* compatibility stubs in strict mode

Realtime compatibility details:

  • /v1/realtime now performs Rust-native websocket relay to selected upstream nodes.
  • The route keeps deterministic ingress errors (426, 503, 504) and exposes selected node via x-compat-ws-node.
  • Before upgrade acceptance, the service performs upstream preflight dialing and returns 504 XR_UPSTREAM_UNAVAILABLE on connect timeout.

Video compatibility details:

  • /v1/video/generations* and /v1/videos* map to the Rust compat task pipeline.
  • /kling/v1/videos/* and /jimeng are supported as compat task ingress paths.

Model compatibility provider precedence:

  • /v1beta/openai/models is pinned to OpenAI semantics.
  • /v1beta/models is pinned to Gemini semantics.
  • /v1/models/:model defaults to OpenAI unless explicit Anthropic headers are present.
  • /v1/models keeps header/query-based provider hints (anthropic/gemini/openai).

Model compatibility response semantics:

  • OpenAI routes return {"success":true,"object":"list","data":[...]} for list and OpenAI model object for retrieve.
  • Gemini list routes return {"models":[...],"nextPageToken":null}.
  • Anthropic list routes return {"data":[...],"first_id":"...","has_more":false,"last_id":"..."}.

Tenant upstream policy payload (PUT /v1/x-router/tenants/:tenantId/upstreams):

  • allowedNodeIds: non-empty upstream node id list.
  • mode: strict (default) or fallback.
    • strict: only route to allowlisted nodes.
    • fallback: if allowlist has no enabled candidates, fallback to global enabled nodes.

Upstream node payload (PUT /v1/x-router/upstreams/nodes/:nodeId):

  • baseUrl: required upstream URL.
  • enabled: optional, defaults to true.
  • headers: optional map of request headers forwarded to this upstream.
  • weight: optional positive integer, defaults to 100 (used by weighted-round-robin).

Service namespace:

  • Request header x-service-id (default default).
  • Tenant governance and tenant upstream policy are scoped by tenant + service.

Test

pnpm --filter @ku0/x-router-rs test:rs
pnpm --filter @ku0/x-router-rs verify:compat-routes

Perf Smoke

pnpm --filter @ku0/x-router-rs perf:rs
pnpm --filter @ku0/x-router-rs perf:rs:realtime-local
pnpm --filter @ku0/x-router-rs perf:rs:realtime-kpi-local

Default profile is compat-chat. Runtime controls:

  • X_ROUTER_PERF_BASE_URL (default http://127.0.0.1:4317)
  • X_ROUTER_PERF_PROFILE (compat-chat | compat-models | compat-video | compat-realtime | control-resolve)
  • X_ROUTER_PERF_TOTAL_REQUESTS (default 400)
  • X_ROUTER_PERF_CONCURRENCY (default 32)
  • X_ROUTER_PERF_TIMEOUT_MS (default 5000)
  • X_ROUTER_PERF_WS_MESSAGES (default 1, applies to compat-realtime)
  • X_ROUTER_PERF_ASSERT_MAX_ERROR_RATE (default 0.0)
  • X_ROUTER_PERF_ASSERT_MAX_P95_MS (default 0.0, disabled when 0)

perf:rs:realtime-local automatically starts:

  • local upstream websocket echo fixture
  • local x-router server with compat + upstream-only mode
  • realtime perf profile run (compat-realtime) against that local stack

perf:rs:realtime-kpi-local runs two local realtime perf phases and enforces:

  • errorRate == 0 on low/high load
  • p95 <= X_ROUTER_PERF_KPI_MAX_P95_MS (default 80)
  • highThroughput / lowThroughput >= X_ROUTER_PERF_KPI_MIN_SCALE_FACTOR (default 1.2)