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CLS observability SDK for LangChain/LangGraph — 6-layer span hierarchy, direct upload to Tencent Cloud CLS

Project description

tencentcloud-cls-sdk-langchain

腾讯云 CLS(日志服务)LangChain/LangGraph 可观测插件。

自动采集 LangChain/LangGraph 应用的调用链路,生成 6 层 Span 层级模型,直接上报到 CLS。

安装

pip install tencentcloud-cls-sdk-langchain

插件不包含 LangChain/LangGraph 本身,如未安装请先:pip install langchain langgraph langchain-openai

快速接入

1. 配置 CLS 凭据(一次性)

python -m tencentcloud_cls_sdk_langchain.cls_config init

按提示输入 CLS 接入点、Topic ID、SecretId/SecretKey,配置保存到 .env

2. 代码接入

在应用启动代码中加入 3 行:

from opentelemetry.sdk.trace import TracerProvider
from opentelemetry.sdk.trace.export import BatchSpanProcessor
from tencentcloud_cls_sdk_langchain import LangChainInstrumentor
from tencentcloud_cls_sdk_langchain.cls_cloud_exporter import CLSCloudExporter

provider = TracerProvider()
provider.add_span_processor(BatchSpanProcessor(CLSCloudExporter()))
LangChainInstrumentor().instrument(tracer_provider=provider)

# 下面正常写你的 LangChain/LangGraph 代码,无需任何改动

3. 验证

运行应用后约 30 秒,到 CLS 控制台 → 日志主题 → 检索分析,应能看到 6 类 Span。

Span 层级模型

entry (应用入口)
 └─ session (对话窗口)
     └─ agent (每次提问)
         └─ step (每轮 ReAct)
             ├─ chat (LLM 调用)
             └─ tool (工具调用)

环境变量

配置命令 cls_config init 会自动写入 .env,也可以手动设置:

变量 必填 说明
CLS_ENDPOINT CLS API 接入点
CLS_TOPIC_ID CLS 日志主题 ID
CLS_SECRET_ID 腾讯云 SecretId
CLS_SECRET_KEY 腾讯云 SecretKey
CLS_SERVICE_NAME 服务名称(默认 langchain-app

License

Apache-2.0

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