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LangGraph GUI Setup on Windows

This guide will help you set up and run the LangGraph-GUI, both backend and frontend, on a Windows environment, using environment variables for backend port and Ollama URL.

Prerequisites

Before you begin, ensure you have the following installed on your system:

  • Codebase
  • Python or Conda
  • npm
  • Ollama

Download repos

```bash
git clone --recursive https://github.com/LangGraph-GUI/LangGraph-GUI
```

Ollama Setup

  1. Download Ollama from official

    https://ollama.com/download

  2. Open Another PowerShell Terminal
    Open another PowerShell terminal window.

  3. Start Ollama
    Run the Ollama service:

       ollama serve

Backend Setup

  1. Open a PowerShell Terminal Open another PowerShell terminal window to start the setup process.

  2. Create a Conda Environment (Optional) Create a new Conda environment for the LangGraph backend:

    conda create --name langgraph-backend python=3.11

    Activate your new environment:

    conda activate langgraph-backend

  3. Clone the Backend Repository Clone the LangGraph backend repository from GitHub:

    git clone https://github.com/LangGraph-GUI/LangGraph-GUI-backend

  4. Navigate to the Backend Directory Change directory to the backend project folder:

    cd LangGraph-GUI-backend

  5. Install Python Dependencies Install the required Python packages using pip:

    pip install -r requirements.txt

  6. Start the Backend Server

    Set Environment Variables Before starting the backend, you need to set the following environment variables. If you skip this, the default values will be used:

    • BACKEND_PORT: The port number for the backend server. (Default: 5000)
    • OLLAMA_BASE_URL: The base URL for your Ollama service. (Default: http://localhost:11434)

    To set these variables for your PowerShell session, use:

        $env:BACKEND_PORT=5000
    $env:OLLAMA_BASE_URL="http://localhost:11434"

    Run the backend server:

        mkdir src/workspace
cd src/workspace
python ../server.py

Frontend Setup

  1. Open Another PowerShell Terminal
    Open a new PowerShell terminal window.

  2. Clone the Frontend Repository
    frontend need dep Clone the LangGraph frontend repository from GitHub:

        -frontend

  3. Navigate to the Frontend Directory
    Change directory to the frontend project folder:

        cd LangGraph-GUI-frontend

  4. Install Node.js Dependencies
    Use npm to install the required packages:

    npm install

  5. Start the Frontend Server
    Launch the frontend server:

    npm start

Conclusion

After completing the steps above, you should have the backend and frontend servers running along with the Ollama service. You can now access the LangGraph GUI through your web browser at http://localhost:3000.

Note

  • Ensure all terminal windows remain open while running the servers.