chore: fork from IRIS track 供 LICA 部门独立运行

- 复制来源: /home/yueli/track @ 192c8ee (feature/ai-audit-update)
- 组织隔离目标: LICA
- 端口规划: 前端 8030 / 后端 8031 / 数据库 8032
- 已排除 deploy.sh、deploy_full.sh、docker-compose.prod.yml(IRIS 生产发布脚本)
- 已排除工作区未提交改动,取干净的 192c8ee 状态
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2026-09-21 15:56:52 +08:00
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"""健康检查 — 存活探针与就绪探针分离
为什么必须拆开:
- 存活探针(liveness)只回答「进程还活着吗」,绝不能探测外部依赖。
否则数据库抖一下,编排系统会判定进程已死并反复重启容器,
把一次依赖故障放大成全站雪崩。
- 就绪探针(readiness)回答「现在能对外服务吗」。依赖不可用时返回 503,
由负载均衡把该实例摘掉,依赖恢复后自动回来。
"""
from __future__ import annotations
import logging
import anyio
from fastapi import APIRouter
from fastapi.responses import JSONResponse
from sqlalchemy import text
from app.core.config import settings
from app.core.database import AsyncSessionLocal
from app.core.mom_database import mom_engine
logger = logging.getLogger("track.health")
router = APIRouter(tags=["健康检查"])
async def _probe_primary_db() -> bool:
"""主库探活 — 业务强依赖,失败即不就绪"""
try:
async with AsyncSessionLocal() as session:
await session.execute(text("SELECT 1"))
return True
except Exception:
logger.exception("主库探活失败")
return False
def _probe_mom_db_sync() -> bool:
try:
with mom_engine.connect() as conn:
conn.execute(text("SELECT 1"))
return True
except Exception:
logger.exception("MOM 库探活失败")
return False
async def _probe_mom_db() -> bool:
# MOM 用的是同步引擎,放线程池执行,避免阻塞事件循环
return await anyio.to_thread.run_sync(_probe_mom_db_sync)
async def _collect() -> tuple[bool, dict[str, str]]:
primary_ok = await _probe_primary_db()
mom_ok = await _probe_mom_db()
checks = {
"database": "ok" if primary_ok else "fail",
# MOM 是外部只读依赖:挂掉时登录/选料降级,但扫码、流转、看板仍可用。
# 因此只标记 degraded、不摘流量 —— 否则 MOM 一抖就让在产车间全线停摆。
"mom_database": "ok" if mom_ok else "degraded",
}
return primary_ok, checks
@router.get("/health/live", include_in_schema=False)
async def liveness() -> dict:
"""存活探针:不触碰任何依赖,恒定快速返回"""
return {"status": "ok"}
@router.get("/health/ready", include_in_schema=False)
async def readiness() -> JSONResponse:
"""就绪探针:主库不可用时返回 503,让负载均衡摘流量"""
ready, checks = await _collect()
return JSONResponse(
{"status": "ready" if ready else "not_ready", "checks": checks},
status_code=200 if ready else 503,
)
@router.get("/health", include_in_schema=False)
async def health() -> JSONResponse:
"""兼容旧监控脚本:语义等同就绪探针,并附带版本号"""
ready, checks = await _collect()
return JSONResponse(
{
"status": "ok" if ready else "unavailable",
"version": settings.APP_VERSION,
"checks": checks,
},
status_code=200 if ready else 503,
)