mirror of
https://github.com/hwchase17/langchain
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155 lines
3.7 KiB
Plaintext
155 lines
3.7 KiB
Plaintext
# MLflow AI Gateway
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>[The MLflow AI Gateway](https://www.mlflow.org/docs/latest/gateway/index.html) service is a powerful tool designed to streamline the usage and management of various large
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> language model (LLM) providers, such as OpenAI and Anthropic, within an organization. It offers a high-level interface
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> that simplifies the interaction with these services by providing a unified endpoint to handle specific LLM related requests.
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> See [the MLflow AI Gateway documentation](https://mlflow.org/docs/latest/gateway/index.html) for more details.
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## Installation and Setup
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Install `mlflow` with MLflow AI Gateway dependencies:
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```sh
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pip install 'mlflow[gateway]'
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```
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Set the OpenAI API key as an environment variable:
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```sh
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export OPENAI_API_KEY=...
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```
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Create a configuration file:
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```yaml
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routes:
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- name: completions
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route_type: llm/v1/completions
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model:
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provider: openai
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name: text-davinci-003
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config:
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openai_api_key: $OPENAI_API_KEY
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- name: embeddings
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route_type: llm/v1/embeddings
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model:
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provider: openai
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name: text-embedding-ada-002
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config:
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openai_api_key: $OPENAI_API_KEY
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```
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Start the Gateway server:
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```sh
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mlflow gateway start --config-path /path/to/config.yaml
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```
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## Example provided by `MLflow`
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>The `mlflow.langchain` module provides an API for logging and loading `LangChain` models.
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> This module exports multivariate LangChain models in the langchain flavor and univariate LangChain
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> models in the pyfunc flavor.
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See the [API documentation and examples](https://www.mlflow.org/docs/latest/python_api/mlflow.langchain.html).
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## Completions Example
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```python
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import mlflow
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from langchain import LLMChain, PromptTemplate
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from langchain.llms import MlflowAIGateway
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gateway = MlflowAIGateway(
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gateway_uri="http://127.0.0.1:5000",
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route="completions",
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params={
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"temperature": 0.0,
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"top_p": 0.1,
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},
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)
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llm_chain = LLMChain(
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llm=gateway,
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prompt=PromptTemplate(
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input_variables=["adjective"],
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template="Tell me a {adjective} joke",
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),
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)
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result = llm_chain.run(adjective="funny")
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print(result)
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with mlflow.start_run():
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model_info = mlflow.langchain.log_model(chain, "model")
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model = mlflow.pyfunc.load_model(model_info.model_uri)
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print(model.predict([{"adjective": "funny"}]))
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```
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## Embeddings Example
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```python
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from langchain.embeddings import MlflowAIGatewayEmbeddings
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embeddings = MlflowAIGatewayEmbeddings(
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gateway_uri="http://127.0.0.1:5000",
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route="embeddings",
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)
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print(embeddings.embed_query("hello"))
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print(embeddings.embed_documents(["hello"]))
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```
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## Chat Example
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```python
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from langchain.chat_models import ChatMLflowAIGateway
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from langchain.schema import HumanMessage, SystemMessage
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chat = ChatMLflowAIGateway(
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gateway_uri="http://127.0.0.1:5000",
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route="chat",
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params={
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"temperature": 0.1
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}
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)
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messages = [
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SystemMessage(
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content="You are a helpful assistant that translates English to French."
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),
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HumanMessage(
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content="Translate this sentence from English to French: I love programming."
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),
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]
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print(chat(messages))
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```
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## Databricks MLflow AI Gateway
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Databricks MLflow AI Gateway is in private preview.
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Please contact a Databricks representative to enroll in the preview.
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```python
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from langchain import LLMChain, PromptTemplate
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from langchain.llms import MlflowAIGateway
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gateway = MlflowAIGateway(
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gateway_uri="databricks",
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route="completions",
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)
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llm_chain = LLMChain(
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llm=gateway,
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prompt=PromptTemplate(
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input_variables=["adjective"],
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template="Tell me a {adjective} joke",
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),
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)
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result = llm_chain.run(adjective="funny")
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print(result)
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```
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