163ef35dd1
Updated titles into a consistent format. Fixed links to the diagrams. Fixed typos. Note: The Templates menu in the navbar is now sorted by the file names. I'll try sorting the navbar menus by the page titles, not the page file names.
2.7 KiB
RAG - Chroma, Ollama, Gpt4all - private
This template performs RAG with no reliance on external APIs.
It utilizes Ollama the LLM, GPT4All for embeddings, and Chroma for the vectorstore.
The vectorstore is created in chain.py and by default indexes a popular blog posts on Agents for question-answering.
Environment Setup
To set up the environment, you need to download Ollama.
Follow the instructions here.
You can choose the desired LLM with Ollama.
This template uses llama2:7b-chat, which can be accessed using ollama pull llama2:7b-chat.
There are many other options available here.
This package also uses GPT4All embeddings.
Usage
To use this package, you should first have the LangChain CLI installed:
pip install -U langchain-cli
To create a new LangChain project and install this as the only package, you can do:
langchain app new my-app --package rag-chroma-private
If you want to add this to an existing project, you can just run:
langchain app add rag-chroma-private
And add the following code to your server.py file:
from rag_chroma_private import chain as rag_chroma_private_chain
add_routes(app, rag_chroma_private_chain, path="/rag-chroma-private")
(Optional) Let's now configure LangSmith. LangSmith will help us trace, monitor and debug LangChain applications. You can sign up for LangSmith here. If you don't have access, you can skip this section
export LANGCHAIN_TRACING_V2=true
export LANGCHAIN_API_KEY=<your-api-key>
export LANGCHAIN_PROJECT=<your-project> # if not specified, defaults to "default"
If you are inside this directory, then you can spin up a LangServe instance directly by:
langchain serve
This will start the FastAPI app with a server is running locally at http://localhost:8000
We can see all templates at http://127.0.0.1:8000/docs We can access the playground at http://127.0.0.1:8000/rag-chroma-private/playground
We can access the template from code with:
from langserve.client import RemoteRunnable
runnable = RemoteRunnable("http://localhost:8000/rag-chroma-private")
The package will create and add documents to the vector database in chain.py. By default, it will load a popular blog post on agents. However, you can choose from a large number of document loaders here.