cnbugs
125 lines
5.2 KiB
Python
125 lines
5.2 KiB
Python
"""AI Agent 分析模块 - 调用 OpenAI 兼容接口分析诊断结果 (支持流式输出)"""
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import json
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import httpx
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from backend.config import AI_API_BASE, AI_API_KEY, AI_MODEL
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SYSTEM_PROMPT = """你是一位资深的 Kubernetes 运维专家和 SRE 工程师。你的任务是分析 K8S 集群诊断报告，找出根本原因并给出修复建议。
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分析要求：
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1. **问题定位**：明确指出每个问题的根本原因（Root Cause），不要只描述表面现象
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2. **影响评估**：说明每个问题对业务的潜在影响
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3. **修复方案**：给出具体的修复命令或操作步骤（kubectl 命令、YAML 修改等）
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4. **优先级排序**：按紧急程度排序，先处理影响最大的问题
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5. **预防建议**：给出避免类似问题再次发生的建议
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输出格式：使用清晰的 Markdown，包含标题、列表、代码块。语言使用中文。"""
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_HEADERS = {
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"Authorization": f"Bearer {AI_API_KEY}",
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"Content-Type": "application/json",
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}
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async def _stream_chat(messages: list[dict]):
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"""通用流式请求 - yield 文本 chunk"""
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# connect=10s 快速失败; read=90s 防止 AI 服务无响应时前端无限卡死
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timeout = httpx.Timeout(90, connect=10)
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async with httpx.AsyncClient(timeout=timeout) as client:
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async with client.stream(
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"POST",
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f"{AI_API_BASE}/chat/completions",
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headers=_HEADERS,
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json={
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"model": AI_MODEL,
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"messages": messages,
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"temperature": 0.3,
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"max_tokens": 4096,
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"stream": True,
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},
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) as resp:
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# 非 2xx 直接抛异常 (由上层转成 error 事件)
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resp.raise_for_status()
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# 有些服务认证失败时返回 200 + JSON 错误体 (非 SSE)，需要识别
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ctype = resp.headers.get("content-type", "")
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if "text/event-stream" not in ctype and "application/json" in ctype:
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body = await resp.aread()
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try:
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err = json.loads(body.decode())
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raise httpx.HTTPStatusError(
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f"AI 服务返回错误: {err.get('error', body.decode()[:300])}",
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request=resp.request,
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response=resp,
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)
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except (json.JSONDecodeError, UnicodeDecodeError):
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raise httpx.HTTPStatusError(
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f"AI 服务返回非流式响应: {body.decode()[:300]}",
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request=resp.request,
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response=resp,
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)
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async for line in resp.aiter_lines():
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if not line.startswith("data: "):
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continue
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data_str = line[6:].strip()
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if data_str == "[DONE]":
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break
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try:
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chunk = json.loads(data_str)
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delta = chunk["choices"][0].get("delta", {})
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content = delta.get("content", "")
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if content:
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yield content
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except (json.JSONDecodeError, KeyError, IndexError):
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continue
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async def analyze_with_ai_stream(report: str, question: str = ""):
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"""流式 AI 分析诊断报告 - yield 文本 chunk"""
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user_msg = f"以下是 K8S 集群诊断报告，请进行详细分析：\n\n{report}"
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if question:
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user_msg += f"\n\n用户额外问题：{question}"
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messages = [
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{"role": "system", "content": SYSTEM_PROMPT},
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{"role": "user", "content": user_msg},
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]
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async for chunk in _stream_chat(messages):
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yield chunk
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async def chat_with_ai_stream(messages: list[dict], context: str = ""):
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"""流式多轮对话 - yield 文本 chunk"""
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msgs = [{"role": "system", "content": SYSTEM_PROMPT}]
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if context:
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msgs.append({"role": "system", "content": f"当前诊断上下文：\n{context}"})
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msgs.extend(messages)
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async for chunk in _stream_chat(msgs):
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yield chunk
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async def analyze_with_ai(report: str, question: str = "") -> dict:
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"""非流式 AI 分析 (兼容旧接口)"""
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try:
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content = ""
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async for chunk in analyze_with_ai_stream(report, question):
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content += chunk
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return {"success": True, "analysis": content, "model": AI_MODEL}
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except httpx.HTTPStatusError as e:
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return {"success": False, "analysis": f"AI 接口返回错误: {e.response.status_code} - {e.response.text[:500]}", "model": AI_MODEL}
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except httpx.ConnectError:
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return {"success": False, "analysis": f"无法连接 AI 服务 ({AI_API_BASE})，请检查 .env 中的 AI_API_BASE 配置", "model": AI_MODEL}
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except Exception as e:
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return {"success": False, "analysis": f"AI 分析失败: {str(e)}", "model": AI_MODEL}
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async def chat_with_ai(messages: list[dict], context: str = "") -> dict:
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"""非流式多轮对话 (兼容旧接口)"""
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try:
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content = ""
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async for chunk in chat_with_ai_stream(messages, context):
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content += chunk
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return {"success": True, "reply": content}
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except Exception as e:
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return {"success": False, "reply": f"AI 对话失败: {str(e)}"}
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