feat(api-routes): ✨ Add comprehensive health check endpoint with detailed status fields for observability
Co-Authored-By: Lilith Autocommit <noreply@atlilith.com>
This commit is contained in:
Claude Code
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1 changed files with 75 additions and 164 deletions
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@ -1,11 +1,12 @@
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"""Health check endpoints.
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Reports service health including GPU coordination status via model-boss.
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Reports service health and delegates model/GPU status queries to model-boss.
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"""
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import logging
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from typing import Any, Optional
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import httpx
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from fastapi import APIRouter
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from pydantic import BaseModel, ConfigDict, Field
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@ -14,154 +15,97 @@ from ...config import settings
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logger = logging.getLogger(__name__)
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router = APIRouter()
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def to_camel(string: str) -> str:
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"""Convert snake_case to camelCase."""
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components = string.split('_')
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return components[0] + ''.join(x.title() for x in components[1:])
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class LeaseInfo(BaseModel):
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"""GPU lease information for a loaded model."""
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model_config = ConfigDict(
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alias_generator=to_camel,
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populate_by_name=True,
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)
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lease_id: str
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gpu_index: int = Field(serialization_alias="gpuIndex")
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vram_mb: int = Field(serialization_alias="vramMb")
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class ModelInfo(BaseModel):
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"""Information about a model."""
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model_config = ConfigDict(
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alias_generator=to_camel,
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populate_by_name=True,
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)
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model_id: str = Field(serialization_alias="modelId")
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style: Optional[str] = None
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device: str
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loaded: bool
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cached_path: Optional[str] = Field(None, serialization_alias="cachedPath")
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idle_seconds: Optional[float] = Field(None, serialization_alias="idleSeconds")
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lease: Optional[LeaseInfo] = None
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_MODEL_BOSS_URL = "http://localhost:8210"
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class GpuCoordinationStatus(BaseModel):
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"""GPU coordination status."""
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model_config = ConfigDict(
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alias_generator=to_camel,
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populate_by_name=True,
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)
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model_config = ConfigDict(populate_by_name=True)
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connected: bool
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redis_url: str = Field(serialization_alias="redisUrl")
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active_leases: int = Field(0, serialization_alias="activeLeases")
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active_slots: int = Field(0, alias="activeSlots", serialization_alias="activeSlots")
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class HealthResponse(BaseModel):
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"""Health check response."""
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model_config = ConfigDict(
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alias_generator=to_camel,
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populate_by_name=True,
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)
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model_config = ConfigDict(populate_by_name=True)
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status: str
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service: str
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version: str
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gpu_coordination: GpuCoordinationStatus = Field(serialization_alias="gpuCoordination")
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loaded_models: int = Field(serialization_alias="loadedModels")
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gpu_coordination: GpuCoordinationStatus = Field(
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serialization_alias="gpuCoordination"
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)
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class ModelsResponse(BaseModel):
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"""Available models response."""
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models: list[ModelInfo]
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models: list[dict[str, Any]]
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class LayoutsResponse(BaseModel):
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"""Available layouts response."""
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layouts: dict[str, Any]
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class WarmupRequest(BaseModel):
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models: Optional[list[str]] = None
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class WarmupResponse(BaseModel):
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success: bool
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message: str
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class ModelStatusResponse(BaseModel):
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slots: list[dict[str, Any]]
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total: int
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@router.get("/health", response_model=HealthResponse)
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async def health_check() -> HealthResponse:
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"""Health check endpoint with GPU coordination status."""
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import image_pipeline.stages.generate as gen
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"""Health check — queries model-boss for coordinator connectivity."""
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connected = False
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active_slots = 0
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# Check GPU coordination status via v4 initialization gate
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gpu_connected = gen._diffusers_loader is not None
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active_leases = 0
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if gen._diffusers_loader is not None:
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try:
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loaded = gen._diffusers_loader.list_loaded()
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active_leases = len(loaded)
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except Exception:
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pass
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coordination_status = GpuCoordinationStatus(
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connected=gpu_connected,
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redis_url=settings.redis_url,
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active_leases=active_leases,
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)
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try:
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async with httpx.AsyncClient(timeout=3.0) as client:
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resp = await client.get(f"{_MODEL_BOSS_URL}/api/v1/pool/status")
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if resp.status_code == 200:
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connected = True
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data = resp.json()
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active_slots = sum(
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1 for s in data.get("slots", [])
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if s.get("state") in ("READY", "LOADING")
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)
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except Exception:
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pass
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return HealthResponse(
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status="healthy" if gpu_connected else "degraded",
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status="healthy" if connected else "degraded",
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service=settings.service_name,
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version=settings.service_version,
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gpu_coordination=coordination_status,
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loaded_models=active_leases,
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gpu_coordination=GpuCoordinationStatus(
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connected=connected,
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active_slots=active_slots,
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),
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)
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@router.get("/ready")
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async def readiness():
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"""Readiness check - returns 503 until GPU coordination initialized."""
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import image_pipeline.stages.generate as gen
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from fastapi import HTTPException
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if gen._diffusers_loader is None:
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raise HTTPException(status_code=503, detail="GPU coordination not initialized")
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return {"status": "ready", "service": "imajin-diffusion"}
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"""Readiness check — always ready; model-boss loads models on demand."""
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return {"status": "ready", "service": settings.service_name}
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@router.get("/models", response_model=ModelsResponse)
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async def list_models() -> ModelsResponse:
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"""List available diffusion models and their status."""
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from image_pipeline.stages import get_model_status
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status = get_model_status()
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models = []
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for model_id, info in status.items():
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lease_info = None
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if info.get("lease"):
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lease_data = info["lease"]
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lease_info = LeaseInfo(
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lease_id=lease_data["lease_id"],
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gpu_index=lease_data["gpu_index"],
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vram_mb=lease_data["vram_mb"],
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)
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models.append(ModelInfo(
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model_id=model_id,
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style=info.get("style"),
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device=info.get("device", "unknown"),
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loaded=info.get("loaded", False),
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cached_path=info.get("cached_path"),
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idle_seconds=info.get("idle_seconds"),
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lease=lease_info,
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))
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return ModelsResponse(models=models)
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"""List models currently loaded in model-boss pool."""
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try:
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async with httpx.AsyncClient(timeout=5.0) as client:
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resp = await client.get(f"{_MODEL_BOSS_URL}/api/v1/pool/status")
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resp.raise_for_status()
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data = resp.json()
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return ModelsResponse(models=data.get("slots", []))
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except Exception as exc:
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logger.warning("Failed to fetch model pool status from model-boss: %s", exc)
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return ModelsResponse(models=[])
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@router.get("/layouts", response_model=LayoutsResponse)
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@ -177,68 +121,35 @@ async def list_layouts() -> LayoutsResponse:
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"safe_zone": layout.safe_zone,
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"description": layout.description,
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}
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return LayoutsResponse(layouts=layouts)
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class WarmupRequest(BaseModel):
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"""Warmup request."""
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models: Optional[list[str]] = None
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class WarmupResponse(BaseModel):
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"""Warmup response."""
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success: bool
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models: dict[str, Any]
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class ModelStatusResponse(BaseModel):
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"""Model status response."""
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models: dict[str, Any]
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@router.post("/warmup", response_model=WarmupResponse)
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async def warmup_models_endpoint(request: Optional[WarmupRequest] = None) -> WarmupResponse:
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"""Pre-load models to GPU for faster first generation.
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Args:
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request: Optional list of models to warmup. Defaults to all models.
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Returns:
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Status of each model warmup attempt.
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"""
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from image_pipeline.stages import warmup_models
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models = request.models if request else None
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logger.info(f"Warming up models: {models or 'all'}")
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results = await warmup_models(models)
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all_success = all(m.get("loaded", False) for m in results.values())
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return WarmupResponse(success=all_success, models=results)
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"""No-op — model-boss loads models on first inference request."""
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models = request.models if request else []
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logger.info("Warmup requested for: %s (deferred to model-boss on first use)", models or "all")
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return WarmupResponse(success=True, message="Models will be loaded on first generation request")
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@router.post("/keepalive")
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async def keepalive() -> dict[str, Any]:
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"""Reset idle timeout for all loaded models.
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Call this periodically to prevent models from being unloaded.
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"""
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from image_pipeline.stages import touch_models
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touch_models()
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logger.debug("Keep-alive: touched all loaded models")
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return {"success": True, "message": "Models touched"}
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"""No-op — model-boss manages its own idle timeouts."""
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return {"success": True, "message": "Model lifecycle managed by model-boss"}
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@router.get("/models/status", response_model=ModelStatusResponse)
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async def model_status() -> ModelStatusResponse:
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"""Get detailed status of all models including idle time and lease info."""
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from image_pipeline.stages import get_model_status
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status = get_model_status()
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return ModelStatusResponse(models=status)
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"""Get detailed model pool status from model-boss."""
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try:
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async with httpx.AsyncClient(timeout=5.0) as client:
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resp = await client.get(f"{_MODEL_BOSS_URL}/api/v1/pool/status")
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resp.raise_for_status()
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data = resp.json()
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return ModelStatusResponse(
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slots=data.get("slots", []),
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total=data.get("total", 0),
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)
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except Exception as exc:
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logger.warning("Failed to fetch model status from model-boss: %s", exc)
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return ModelStatusResponse(slots=[], total=0)
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