0271942ba5
模型推理全异步化改造： - 计算节点 InferenceSession 改为后台线程异步加载模型，load 立即返回， 加载期间事件循环保持响应（/inference/status 与 /health 不阻塞） - 后端模型加载改为异步派发 + 轮询对账器（reconcile_inference_loads）， 任务状态由 starting 自动推进到 ready/error，解决多节点启动超时 （timeout of 120000ms exceeded） - 推理删除/卸载改为任务感知 + 短超时，删除先删记录再 best-effort 卸载， 不再被不可达节点阻塞；同节点新模型替换旧任务标记失效 - 流式对话透传 task_id/node_id 路由到真正加载模型的算力节点， useStreamChat 解析 SSE 错误帧以干净文案展示 - 对话历史按任务 id 本地持久化，退出重进可恢复；移除页脚提示文本 - 新增后端推理异步加载与计算节点异步状态机单元测试 Co-Authored-By: Claude <noreply@anthropic.com>
194 lines
9.3 KiB
Python
194 lines
9.3 KiB
Python
from __future__ import annotations
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import json
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import time
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from typing import Any
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from app.db.platform_store import get_platform_store
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from app.modules.compute_gateway.client import ComputeNodeClient
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# starting 状态允许的最大轮询次数（约 40 * 3s ≈ 2 分钟），超过即判定节点不可达
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MAX_STARTING_ATTEMPTS = 40
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def _node_for_task(task: dict[str, Any]) -> dict[str, Any] | None:
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return next((node for node in get_platform_store().compute_nodes() if node["id"] == task.get("compute_node_id")), None)
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def _parse_inference_load_status(task: dict[str, Any]) -> tuple[list[dict[str, Any]], dict[str, Any]]:
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load_status = task.get("load_status") or {}
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if isinstance(load_status, str):
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try:
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load_status = json.loads(load_status)
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except (json.JSONDecodeError, TypeError):
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load_status = {}
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return load_status.get("loaded_models") or [], load_status
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async def reconcile_inference_loads(store: Any) -> list[dict[str, Any]]:
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"""推进处于 starting 状态的推理加载。
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模型加载已改为异步派发：/model-compare/{id}/load 立即返回，这里在每次
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轮询时查询对应计算节点的 /inference/status，把任务从 starting 推进到
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ready/error。使用短超时，单节点不可达不会阻塞整轮轮询。
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"""
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reconciled: list[dict[str, Any]] = []
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now = time.time()
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for task in store.compare_tasks():
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items, _ = _parse_inference_load_status(task)
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if not any(item.get("status") == "starting" for item in items):
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continue
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# dirty 只要处理过任一 starting 项就置位：load_attempts / last_polled_at
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# 必须落库，否则节点不可达时计数不会累积，封顶逻辑永远触发不了
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dirty = False
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for item in items:
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if item.get("status") != "starting":
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continue
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# 节流：同一 item 每 3s 只查询一次
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if now - float(item.get("last_polled_at") or 0) < 3:
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continue
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item["last_polled_at"] = now
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item["load_attempts"] = int(item.get("load_attempts") or 0) + 1
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dirty = True
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node = next((n for n in store.compute_nodes() if n["id"] == item.get("node_id")), None)
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if not node:
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item["status"] = "error"
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item["error"] = "compute node deleted"
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store.mark_inference_unloaded(item.get("node_id") or "")
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continue
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if not node.get("enabled") or node.get("scheduler_status") != "online":
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item["status"] = "error"
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item["error"] = "compute node offline"
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store.mark_inference_unloaded(node["id"])
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continue
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try:
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status = await ComputeNodeClient(node["api_base_url"]).inference_status()
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except Exception as exc: # noqa: BLE001 - node unreachable; keep retrying until cap
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if int(item.get("load_attempts") or 0) >= MAX_STARTING_ATTEMPTS:
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item["status"] = "error"
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item["error"] = f"compute node unreachable: {exc}"
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store.mark_inference_unloaded(node["id"])
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continue
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node_status = status.get("status")
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if node_status == "ready":
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item["status"] = "ready"
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item.pop("error", None)
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store.mark_inference_loaded(node["id"])
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elif node_status == "error":
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item["status"] = "error"
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item["error"] = status.get("error") or "model load failed on compute node"
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store.mark_inference_unloaded(node["id"])
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elif node_status == "idle":
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# 节点重启导致已加载模型丢失
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item["status"] = "error"
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item["error"] = "model disappeared from compute node (node may have restarted)"
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store.mark_inference_unloaded(node["id"])
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# node_status == "loading" -> 保持 starting，下轮再查
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if dirty:
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if any(i.get("status") in {"ready", "running"} for i in items):
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new_status = "loaded"
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elif any(i.get("status") == "starting" for i in items):
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new_status = "starting" # 仍在加载中，保持 starting
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else:
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new_status = "failed"
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store.update_compare_task(task["id"], {"status": new_status, "load_status": {"loaded_models": items}})
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reconciled.append({"task_id": task["id"], "status": new_status})
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return reconciled
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async def fetch_eval_result_content(client: ComputeNodeClient, node: dict[str, Any], job: dict[str, Any]) -> dict[str, Any] | None:
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output_dir = job.get("output_dir")
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if not output_dir:
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return None
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full_path = f"{str(output_dir).rstrip('/')}/eval_results.json"
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data_root = "/data/yg-ft/"
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if full_path.startswith(data_root):
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full_path = full_path[len(data_root):]
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rel_path = full_path.lstrip("/")
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import httpx
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url = f"{node['api_base_url'].rstrip('/')}/modelTF/compute/files/read"
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async with httpx.AsyncClient(timeout=30, headers=client.headers()) as http:
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response = await http.get(url, params={"path": rel_path})
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response.raise_for_status()
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payload = response.json()
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return payload if isinstance(payload, dict) else None
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async def poll_compute_jobs_once() -> dict[str, Any]:
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store = get_platform_store()
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synced: list[dict[str, Any]] = []
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failed: list[dict[str, str]] = []
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for task in store.running_compute_tasks():
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node = _node_for_task(task)
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if not node:
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failed.append({"task_id": task["id"], "error": "compute node not found"})
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continue
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try:
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client = ComputeNodeClient(node["api_base_url"])
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job = await client.get_job(task["compute_job_id"])
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try:
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logs = await client.job_logs(task["compute_job_id"], tail_lines=5000)
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store.record_training_log_metrics(task["id"], str(logs.get("content") or ""))
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except Exception:
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pass
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# P0-4: Force-fetch last log snippet when job reaches terminal state
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if job.get("status") in {"failed", "stopped"}:
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try:
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last_logs = await client.job_logs(task["compute_job_id"], tail_lines=200)
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job["log_snippet"] = str(last_logs.get("content") or "")[:8192]
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except Exception:
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pass
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synced.append(store.apply_compute_job(task["id"], job))
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except Exception as exc: # noqa: BLE001 - keep polling other jobs
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failed.append({"task_id": task["id"], "error": str(exc)})
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standalone_synced: list[dict[str, Any]] = []
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for record in store.active_standalone_compute_jobs():
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node = next((item for item in store.compute_nodes() if item["id"] == record.get("node_id")), None)
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if not node:
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failed.append({"job_id": record["id"], "error": "compute node not found"})
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continue
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try:
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job = await ComputeNodeClient(node["api_base_url"]).get_job(record["id"])
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standalone_synced.append(store.sync_model_merge_job(record["id"], job))
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except Exception as exc: # noqa: BLE001 - keep polling other jobs
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failed.append({"job_id": record["id"], "error": str(exc)})
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# ── Eval job sync ────────────────────────────────────────────────
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eval_synced = 0
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for eval_task in store.running_eval_tasks():
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node = next(
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(item for item in store.compute_nodes() if item["id"] == eval_task.get("compute_node_id")),
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None,
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)
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if not node:
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failed.append({"eval_task_id": eval_task["id"], "error": "compute node not found"})
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continue
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try:
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client = ComputeNodeClient(node["api_base_url"])
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job = await client.get_job(eval_task["compute_job_id"])
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result_content = None
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# Try to read eval_results.json from the job output directory
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if job.get("status") == "completed" and job.get("output_dir"):
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try:
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result_content = await fetch_eval_result_content(client, node, job)
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except Exception:
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pass
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store.apply_eval_job_result(eval_task["id"], job, result_content)
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# If job completed, un-mark inference loaded
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if job.get("status") in {"completed", "failed", "stopped"}:
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store.mark_inference_unloaded(node["id"])
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eval_synced += 1
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except Exception as exc: # noqa: BLE001
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failed.append({"eval_task_id": eval_task["id"], "error": str(exc)})
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# ── Inference load reconciliation ─────────────────────────────────────
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try:
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inference_reconciled = await reconcile_inference_loads(store)
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except Exception as exc: # noqa: BLE001 - keep polling alive
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failed.append({"inference_reconcile": str(exc)})
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inference_reconciled = []
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return {"synced": len(synced) + len(standalone_synced) + eval_synced, "failed": failed,
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"items": synced, "standalone": standalone_synced, "eval_synced": eval_synced,
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"inference_reconciled": inference_reconciled}
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