feat(model): support ollama as an optional llm & embedding proxy

[GITHUBear]

Description

Support Ollama as an optional LLM and Embedding proxy via lib ollama-python

Use Ollama Proxy LLM by modifying the following .env configurations:

LLM_MODEL=ollama_proxyllm
MODEL_SERVER=http://127.0.0.1:11434
PROXYLLM_BACKEND=llama3:instruct

Use Ollama Proxy Embedding by modifying the following .env configurations:

EMBEDDING_MODEL=proxy_ollama
proxy_ollama_proxy_server_url=http://127.0.0.1:11434
proxy_ollama_proxy_backend=llama3:instruct

How Has This Been Tested?

• Simple Chat.
• Chat Data.
• Knowledge Base.

Snapshots:

Checklist:

• My code follows the style guidelines of this project
• I have already rebased the commits and make the commit message conform to the project standard.
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• Any dependent changes have been merged and published in downstream modules

[Aries-ckt]

hi, @GITHUBear, thanks for your contribution, ollama is a good llm management tool. @fangyinc have a check please.

[fangyinc]

Test passed.

Install ollama

If your system is linux.

curl -fsSL https://ollama.com/install.sh | sh

Pull models.

1. Pull LLM

ollama pull qwen:0.5b

2. Pull embedding model.

ollama pull nomic-embed-text

3. install ollama package.

pip install ollama

Use ollama proxy model in DB-GPT

LLM_MODEL=ollama_proxyllm \
PROXY_SERVER_URL=http://127.0.0.1:11434 \
PROXYLLM_BACKEND="qwen:0.5b" \
PROXY_API_KEY=not_used \
EMBEDDING_MODEL=proxy_ollama \
proxy_ollama_proxy_server_url=http://127.0.0.1:11434 \
proxy_ollama_proxy_backend="nomic-embed-text:latest"   \
dbgpt start webserver

[fangyinc]

LGTM.

[fangyinc]

Use ollama with python code.

import asyncio
from dbgpt.core import ModelRequest
from dbgpt.model.proxy import OllamaLLMClient

client=OllamaLLMClient()

print(asyncio.run(client.generate(ModelRequest._build("qwen:0.5b", "你是谁？"))))

[fangyinc]

r+

[Aries-ckt]

LGTM.