MLflow AI Gateway for LLMs
MLflow AI Gateway for LLMs 是一个强大的工具,旨在简化和统一组织内各种大型语言模型(LLM)提供商(如OpenAI和Anthropic)的使用和管理。它提供了一个高级接口,通过统一的端点处理特定的LLM相关请求,从而简化了与这些服务的交互。
安装与设置
安装带有MLflow GenAI依赖项的mlflow
:
pip install 'mlflow[genai]'
将OpenAI API密钥设置为环境变量:
export OPENAI_API_KEY=...
创建一个配置文件:
endpoints:
- name: completions
endpoint_type: llm/v1/completions
model:
provider: openai
name: text-davinci-003
config:
openai_api_key: $OPENAI_API_KEY
- name: embeddings
endpoint_type: llm/v1/embeddings
model:
provider: openai
name: text-embedding-ada-002
config:
openai_api_key: $OPENAI_API_KEY
启动网关服务器:
mlflow gateway start --config-path /path/to/config.yaml
MLflow
提供的示例
mlflow.langchain
模块提供了一个用于记录和加载LangChain
模型的 API。 该模块以 langchain 风格导出多变量 LangChain 模型,并以 pyfunc 风格导出单变量 LangChain 模型。
查看API文档和示例以获取更多信息。
完成示例
import mlflow
from langchain.chains import LLMChain, PromptTemplate
from langchain_community.llms import Mlflow
llm = Mlflow(
target_uri="http://127.0.0.1:5000",
endpoint="completions",
)
llm_chain = LLMChain(
llm=Mlflow,
prompt=PromptTemplate(
input_variables=["adjective"],
template="Tell me a {adjective} joke",
),
)
result = llm_chain.run(adjective="funny")
print(result)
with mlflow.start_run():
model_info = mlflow.langchain.log_model(chain, "model")
model = mlflow.pyfunc.load_model(model_info.model_uri)
print(model.predict([{"adjective": "funny"}]))
嵌入示例
from langchain_community.embeddings import MlflowEmbeddings
embeddings = MlflowEmbeddings(
target_uri="http://127.0.0.1:5000",
endpoint="embeddings",
)
print(embeddings.embed_query("hello"))
print(embeddings.embed_documents(["hello"]))
API Reference:MlflowEmbeddings
聊天示例
from langchain_community.chat_models import ChatMlflow
from langchain_core.messages import HumanMessage, SystemMessage
chat = ChatMlflow(
target_uri="http://127.0.0.1:5000",
endpoint="chat",
)
messages = [
SystemMessage(
content="You are a helpful assistant that translates English to French."
),
HumanMessage(
content="Translate this sentence from English to French: I love programming."
),
]
print(chat(messages))