Open Network Diagram

A declarative, self-hosted tool for visualising and managing home lab & network architecture diagrams.

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📝 About

Open Network Diagram is an open-source, self-hosted tool for creating interactive network and infrastructure diagrams using a declarative JSON format.

✅ Fully self-hostable via Docker
✅ JSON-based network structure (editable in UI or manually) ✅ Interactive network visualisation
✅ Simple file-based configuration
✅ Lightweight Svelte

Use it to document your home lab, office network, or cloud infrastructure with an easy-to-use web interface.

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🚀 Quick Start (For Users)

1️⃣ Run Open Network Diagram via Docker

Pull and run the latest image:

docker run -d -p 8080:3000 jcreek23/open-network-diagram

• -p 8080:3000 → Maps the app to http://localhost:8080

2️⃣ Open the Web UI

Visit http://localhost:8080 to view your network diagram.

3️⃣ Modify Your Network (JSON-Based)

• The app reads /data/network.json from static assets.
• In this repo, the default file is static/data/network.json.
• Update that file to change the diagram data.

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👩‍💻 Development Setup

1️⃣ Clone the Repository

git clone https://github.com/jcreek/OpenNetworkDiagram.git
cd open-network-diagram

2️⃣ Install Dependencies

pnpm install

3️⃣ Run in Development Mode

pnpm run dev

• Runs at http://localhost:5173

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🛠️ Project Structure

open-network-diagram/
│   ├── src/              # Svelte components
│   ├── package.json      # Dependencies
│── Dockerfile            # Docker setup
│── .github/workflows/    # CI/CD pipelines
│── README.md             # Documentation

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📦 Docker Build & Deployment

Build the Docker Image Locally

docker build -t open-network-diagram .

Run Locally

docker run -p 8080:3000 open-network-diagram

CI/CD (GitHub Actions)

• Automatic Docker builds when changes are pushed to main.
• Pushes the latest image to Docker Hub.

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📝 JSON Network Configuration Example

Define your network using network.json:

{
	"machines": [
		{
			"machineName": "ProxRouter",
			"ipAddress": "10.0.0.3",
			"role": "Hypervisor",
			"operatingSystem": "Proxmox",
			"software": {
				"vms": [
					{ "name": "OpnSense", "role": "Router", "ipAddress": "10.0.0.4" },
					{ "name": "PiVPN", "role": "VPN Server", "ipAddress": "10.0.0.5" }
				]
			},
			"hardware": {
				"cpu": "Intel N100",
				"ram": "8GB",
				"networkPorts": 4
			}
		}
	]
}

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🔜 Roadmap

✅ Initial version with JSON-based diagrams
⏳ Drag-and-drop editing in the UI
⏳ Custom icons for different devices
⏳ Export diagrams as PNG/SVG/Graphviz
⏳ Dark mode & UI themes

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🤝 Contributing

We welcome contributions! To contribute:

1. Fork the repository.
2. Create a feature branch (git checkout -b feature-name).
3. Commit your changes (git commit -m "Add feature X").
4. Push to your fork (git push origin feature-name).
5. Submit a Pull Request.

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📜 License

GNU GPL v3 License – Free to use, modify, and distribute, except distributing closed source versions.

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📬 Contact

Author: Joshua Creek
Project Repo: GitHub

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🔥 Next Steps

✅ Set up GitHub Repo
✅ Push initial project structure
✅ Add CI/CD for automated Docker builds