RAG Service Configuration

This document describes how to configure the RAG service, including setting up Language Model (LLM) and Embedding providers.

Provider Support Matrix

The following table shows which model types are supported by each provider:

Provider	LLM Support	Embedding Support
dashscope	Yes	Yes
ollama	Yes	Yes
openai	Yes	Yes
openrouter	Yes	No

LLM Provider Configuration

The llm section in the configuration file is used to configure the Language Model (LLM) used by the RAG service.

Here are the configuration examples for each supported LLM provider:

OpenAI LLM Configuration

See more configurations

lua

llm = { -- Configuration for the Language Model (LLM) used by the RAG service
  provider = "openai", -- The LLM provider ("openai")
  endpoint = "https://api.openai.com/v1", -- The LLM API endpoint
  api_key = "OPENAI_API_KEY", -- The environment variable name for the LLM API key
  model = "gpt-4o-mini", -- The LLM model name (e.g., "gpt-4o-mini", "gpt-3.5-turbo")
  extra = {-- Extra configuration options for the LLM (optional)
    temperature = 0.7, -- Controls the randomness of the output. Lower values make it more deterministic.
    max_tokens = 512, -- The maximum number of tokens to generate in the completion.
    -- system_prompt = "You are a helpful assistant.", -- A system prompt to guide the model's behavior.
    -- timeout = 120, -- Request timeout in seconds.
  },
},

DashScope LLM Configuration

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lua

llm = { -- Configuration for the Language Model (LLM) used by the RAG service
  provider = "dashscope", -- The LLM provider ("dashscope")
  endpoint = "", -- The LLM API endpoint (DashScope typically uses default or environment variables)
  api_key = "DASHSCOPE_API_KEY", -- The environment variable name for the LLM API key
  model = "qwen-plus", -- The LLM model name (e.g., "qwen-plus", "qwen-max")
  extra = nil, -- Extra configuration options for the LLM (optional)
},

Ollama LLM Configuration

See more configurations

lua

llm = { -- Configuration for the Language Model (LLM) used by the RAG service
  provider = "ollama", -- The LLM provider ("ollama")
  endpoint = "http://localhost:11434", -- The LLM API endpoint for Ollama
  api_key = "", -- Ollama typically does not require an API key
  model = "llama2", -- The LLM model name (e.g., "llama2", "mistral")
  extra = nil, -- Extra configuration options for the LLM (optional) Kristin", -- Extra configuration options for the LLM (optional)
},

OpenRouter LLM Configuration

See more configurations

lua

llm = { -- Configuration for the Language Model (LLM) used by the RAG service
  provider = "openrouter", -- The LLM provider ("openrouter")
  endpoint = "https://openrouter.ai/api/v1", -- The LLM API endpoint for OpenRouter
  api_key = "OPENROUTER_API_KEY", -- The environment variable name for the LLM API key
  model = "openai/gpt-4o-mini", -- The LLM model name (e.g., "openai/gpt-4o-mini", "mistralai/mistral-7b-instruct")
  extra = nil, -- Extra configuration options for the LLM (optional)
},

Embedding Provider Configuration

The embedding section in the configuration file is used to configure the Embedding Model used by the RAG service.

Here are the configuration examples for each supported Embedding provider:

OpenAI Embedding Configuration

See more configurations

lua

embed = { -- Configuration for the Embedding Model used by the RAG service
  provider = "openai", -- The Embedding provider ("openai")
  endpoint = "https://api.openai.com/v1", -- The Embedding API endpoint
  api_key = "OPENAI_API_KEY", -- The environment variable name for the Embedding API key
  model = "text-embedding-3-large", -- The Embedding model name (e.g., "text-embedding-3-small", "text-embedding-3-large")
  extra = {-- Extra configuration options for the Embedding model (optional)
    dimensions = nil,
  },
},

DashScope Embedding Configuration

See more configurations

lua

embed = { -- Configuration for the Embedding Model used by the RAG service
  provider = "dashscope", -- The Embedding provider ("dashscope")
  endpoint = "", -- The Embedding API endpoint (DashScope typically uses default or environment variables)
  api_key = "DASHSCOPE_API_KEY", -- The environment variable name for the Embedding API key
  model = "text-embedding-v3", -- The Embedding model name (e.g., "text-embedding-v2")
  extra = { -- Extra configuration options for the Embedding model (optional)
    embed_batch_size = 10,
  },
},

Ollama Embedding Configuration

See more configurations

lua

embed = { -- Configuration for the Embedding Model used by the RAG service
  provider = "ollama", -- The Embedding provider ("ollama")
  endpoint = "http://localhost:11434", -- The Embedding API endpoint for Ollama
  api_key = "", -- Ollama typically does not require an API key
  model = "nomic-embed-text", -- The Embedding model name (e.g., "nomic-embed-text")
  extra = { -- Extra configuration options for the Embedding model (optional)
    embed_batch_size = 10，
  },
},