大纲
- 开源大语言模型
- 大语言模型管理
- 私有大语言模型服务部署方案
开源大语言模型
担心安全与隐私？可私有部署的开源大模型
- 商业大模型，不支持私有部署
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- ChatGPT
- Claude
- Google Gemini
- 百度问心一言
- 开源大模型，支持私有部署
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- Mistral
- Meta Llama
- ChatGLM
- 阿里通义千问
常用开源大模型列表
开源大模型分支
大语言模型管理
大语言模型管理工具
- HuggingFace 全面的大语言模型管理平台
- Ollama 在本地管理大语言模型，下载速度超快
- llama.cpp 在本地和云端的各种硬件上以最少的设置和最先进的性能实现 LLM 推理
- GPT4All 一个免费使用、本地运行、具有隐私意识的聊天机器人。无需 GPU 或互联网
Ollama 速度最快的大语言模型管理工具
Ollama 的命令
ollama pull llama2
ollama list
ollama run llama2 "Summarize this file: $(cat README.md)"ollama servecurl http://localhost:11434/api/generate -d '{"model": "llama2","prompt":"Why is the sky blue?"
}'
curl http://localhost:11434/api/chat -d '{"model": "mistral","messages": [{ "role": "user", "content": "why is the sky blue?" }]
}'
大语言模型的前端
大语言模型的应用前端
- 开源平台 ollama-chatbot、PrivateGPT、gradio
- 开源服务 hugging face TGI、langchain-serve
- 开源框架 langchain llama-index
ollama chatbot
docker run -p 3000:3000 ghcr.io/ivanfioravanti/chatbot-ollama:main
## http://localhost:3000
ollama chatbot
PrivateGPT
PrivateGPT 提供了一个 API，其中包含构建私有的、上下文感知的 AI 应用程序所需的所有构建块。该 API 遵循并扩展了 OpenAI API 标准，支持普通响应和流响应。这意味着，如果您可以在您的工具之一中使用 OpenAI API，则可以使用您自己的 PrivateGPT API，无需更改代码，并且如果您在本地模式下运行 privateGPT，则免费。
PrivateGPT 架构
- FastAPI
- LLamaIndex
- 支持本地 LLM，比如 ChatGLM llama Mistral
- 支持远程 LLM，比如 OpenAI Claud
- 支持嵌入 embeddings，比如 ollama embeddings-huggingface
- 支持向量存储，比如 Qdrant, ChromaDB and Postgres
PrivateGPT 环境准备
git clone https://github.com/imartinez/privateGPT
cd privateGPT
#不支持3.11之前的版本
python3.11 -m venv .venv
source .venv/bin/activate
pip install --upgrade pip poetry#虽然官网只说了要安装少部分的依赖，但是那些依赖管理不是那么完善，容易有遗漏
#所以我们的策略就是全都要。
poetry install --extras "ui llms-llama-cpp llms-openai llms-openai-like llms-ollama llms-sagemaker llms-azopenai embeddings-ollama embeddings-huggingface embeddings-openai embeddings-sagemaker embeddings-azopenai vector-stores-qdrant vector-stores-chroma vector-stores-postgres storage-nodestore-postgres"#或者用这个安装脚本
#poetry install --extras "$(sed -n '/tool.poetry.extras/,/^$/p' pyproject.toml | awk -F= 'NR>1{print $1}' | xargs)"
ollama 部署方式
ollama pull mistral
ollama pull nomic-embed-text
ollama serve#官方这个依赖不够，还需要额外安装torch，所以尽量采用上面提到的全部安装的策略
poetry install --extras "ui llms-ollama embeddings-ollama vector-stores-qdrant"
PGPT_PROFILES=ollama poetry run python -m private_gpt
setting-ollama.yaml
server:env_name: ${APP_ENV:ollama}llm:mode: ollamamax_new_tokens: 512context_window: 3900temperature: 0.1 #The temperature of the model. Increasing the temperature will make the model answer more creatively. A value of 0.1 would be more factual. (Default: 0.1)embedding:mode: ollamaollama:llm_model: mistralembedding_model: nomic-embed-textapi_base: http://localhost:11434tfs_z: 1.0 ## Tail free sampling is used to reduce the impact of less probable tokens from the output. A higher value (e.g., 2.0) will reduce the impact more, while a value of 1.0 disables this setting.top_k: 40 ## Reduces the probability of generating nonsense. A higher value (e.g. 100) will give more diverse answers, while a lower value (e.g. 10) will be more conservative. (Default: 40)top_p: 0.9 ## Works together with top-k. A higher value (e.g., 0.95) will lead to more diverse text, while a lower value (e.g., 0.5) will generate more focused and conservative text. (Default: 0.9)repeat_last_n: 64 ## Sets how far back for the model to look back to prevent repetition. (Default: 64, 0 = disabled, -1 = num_ctx)repeat_penalty: 1.2 ## Sets how strongly to penalize repetitions. A higher value (e.g., 1.5) will penalize repetitions more strongly, while a lower value (e.g., 0.9) will be more lenient. (Default: 1.1)vectorstore:database: qdrantqdrant:path: local_data/private_gpt/qdrant
启动
PGPT_PROFILES=ollama poetry run python -m private_gptpoetry run python -m private_gpt
02:36:06.928 [INFO ] private_gpt.settings.settings_loader - Starting application with profiles=['default', 'ollama']
02:36:46.567 [INFO ] private_gpt.components.llm.llm_component - Initializing the LLM in mode=ollama
02:36:47.405 [INFO ] private_gpt.components.embedding.embedding_component - Initializing the embedding model in mode=ollama
02:36:47.414 [INFO ] llama_index.core.indices.loading - Loading all indices.
02:36:47.571 [INFO ] private_gpt.ui.ui - Mounting the gradio UI, at path=/
02:36:47.620 [INFO ] uvicorn.error - Started server process [72677]
02:36:47.620 [INFO ] uvicorn.error - Waiting for application startup.
02:36:47.620 [INFO ] uvicorn.error - Application startup complete.
02:36:47.620 [INFO ] uvicorn.error - Uvicorn running on http://0.0.0.0:8001 (Press CTRL+C to quit)
PrivateGPT UI
local 部署模式
#todo: 需要安装llama-cpp，每个平台的安装方式都不同，参考官方文档poetry run python scripts/setup
PGPT_PROFILES=local poetry run python -m private_gpt
setting-local.yaml
server:env_name: ${APP_ENV:local}llm:mode: llamacpp## Should be matching the selected modelmax_new_tokens: 512context_window: 3900tokenizer: mistralai/Mistral-7B-Instruct-v0.2llamacpp:prompt_style: "mistral"llm_hf_repo_id: TheBloke/Mistral-7B-Instruct-v0.2-GGUFllm_hf_model_file: mistral-7b-instruct-v0.2.Q4_K_M.ggufembedding:mode: huggingfacehuggingface:embedding_hf_model_name: BAAI/bge-small-en-v1.5vectorstore:database: qdrantqdrant:path: local_data/private_gpt/qdrant
非私有 OpenAI-powered 部署
poetry install --extras "ui llms-openai embeddings-openai vector-stores-qdrant"
PGPT_PROFILES=openai poetry run python -m private_gpt
setting-openai.yaml
server:env_name: ${APP_ENV:openai}llm:mode: openaiembedding:mode: openaiopenai:api_key: ${OPENAI_API_KEY:}model: gpt-3.5-turbo
openai 风格的 API 调用
- The API is built using FastAPI and follows OpenAI's API scheme.
- The RAG pipeline is based on LlamaIndex.
curl -X POST http://localhost:8000/v1/completions \-H "Content-Type: application/json" \-d '{"prompt": "string","stream": true}'
