feat: K8S智能诊断平台 - 一键诊断+AI分析+Web仪表盘

- 后端: FastAPI + kubectl 9大检查项(Pod/Node/Event/Deploy/Service/PVC/资源/网络)
- AI Agent: OpenAI兼容接口自动分析故障根因+多轮追问对话
- 前端: Vue3 + Element Plus 仪表盘, 健康评分, 问题列表, 资源监控
- 一键启动脚本 start.sh

backend/main.py

@@ -0,0 +1,108 @@
+"""K8S 智能诊断平台 - FastAPI 主应用"""
+import os
+from datetime import datetime
+from fastapi import FastAPI, HTTPException
+from fastapi.middleware.cors import CORSMiddleware
+from fastapi.staticfiles import StaticFiles
+from pydantic import BaseModel
+from typing import Optional
+
+from backend.config import PORT
+from backend.diagnosis import run_full_diagnosis, build_diagnosis_report, ALL_CHECKS
+from backend.ai_agent import analyze_with_ai, chat_with_ai
+
+app = FastAPI(title="K8S 智能诊断平台", version="1.0.0")
+
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=["*"],
+    allow_methods=["*"],
+    allow_headers=["*"],
+)
+
+# 存储最近诊断结果 (内存)
+_last_diagnosis: Optional[dict] = None
+_last_report: str = ""
+
+
+class DiagnoseRequest(BaseModel):
+    namespace: str = ""
+    checks: Optional[list[str]] = None
+
+
+class AnalyzeRequest(BaseModel):
+    question: str = ""
+
+
+class ChatRequest(BaseModel):
+    messages: list[dict]
+
+
+@app.get("/api/health")
+async def health():
+    return {"status": "ok", "time": datetime.now().isoformat()}
+
+
+@app.get("/api/checks")
+async def list_checks():
+    """列出所有可用诊断项"""
+    return {
+        "checks": [
+            {"name": name, "title": fn.__doc__ or name}
+            for name, fn in ALL_CHECKS.items()
+        ]
+    }
+
+
+@app.post("/api/diagnose")
+async def diagnose(req: DiagnoseRequest):
+    """执行一键诊断"""
+    global _last_diagnosis, _last_report
+    _last_diagnosis = await run_full_diagnosis(namespace=req.namespace, checks=req.checks)
+    _last_report = build_diagnosis_report(_last_diagnosis)
+    return _last_diagnosis
+
+
+@app.get("/api/diagnosis/latest")
+async def get_latest():
+    """获取最近一次诊断结果"""
+    if _last_diagnosis is None:
+        raise HTTPException(status_code=404, detail="暂无诊断记录，请先执行诊断")
+    return _last_diagnosis
+
+
+@app.post("/api/analyze")
+async def analyze(req: AnalyzeRequest):
+    """AI 分析诊断结果"""
+    global _last_diagnosis, _last_report
+    if _last_diagnosis is None:
+        _last_diagnosis = await run_full_diagnosis()
+        _last_report = build_diagnosis_report(_last_diagnosis)
+    result = await analyze_with_ai(_last_report, question=req.question)
+    return result
+
+
+@app.post("/api/chat")
+async def chat(req: ChatRequest):
+    """AI 多轮对话 (基于诊断上下文追问)"""
+    result = await chat_with_ai(req.messages, context=_last_report)
+    return result
+
+
+@app.get("/api/report")
+async def get_report():
+    """获取诊断报告文本"""
+    if not _last_report:
+        raise HTTPException(status_code=404, detail="暂无诊断报告")
+    return {"report": _last_report}
+
+
+# 静态文件服务 (前端)
+static_dir = os.path.join(os.path.dirname(os.path.dirname(__file__)), "frontend", "dist")
+if os.path.isdir(static_dir):
+    app.mount("/", StaticFiles(directory=static_dir, html=True), name="static")
+
+
+if __name__ == "__main__":
+    import uvicorn
+    uvicorn.run(app, host="0.0.0.0", port=PORT)