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# Diagram Viewer Wiki
Welcome to the **Diagram Viewer** project documentation.
This project provides a static web interface for viewing and managing network architecture diagrams generated with Python's `diagrams` library.
## 📚 Contents
- [Getting Started](#getting-started)
- [Development Guide](#development-guide)
- [Deployment Guide](#deployment-guide)
- [Architecture Overview](#architecture-overview)
---
## Getting Started
### Prerequisites
- Python 3.8+
- Graphviz
- Docker (for deployment)
### Quick Start
```bash
# Clone repository
git clone git@git.appmodel.nl:Tour/diagram.git
cd diagram
# Create virtual environment
python -m venv .venv
source .venv/bin/activate # Windows: .venv\Scripts\activate
# Install dependencies
pip install -r requirements.txt
# Generate diagrams
python lan_architecture.py
python main.py
```
---
## Development Guide
### Project Structure
```
diagram/
├── Dockerfile # Multi-stage build for production
├── docker-compose.yml # Docker Compose configuration
├── requirements.txt # Python dependencies
├── lan_architecture.py # LAN architecture diagram generator
├── main.py # Main diagram generator
├── public/
│ └── index.html # Live Mermaid diagram editor
└── wiki/ # Documentation (this wiki)
```
### Adding New Diagrams
1. Create a new Python file (e.g., `network_diagram.py`)
2. Import required components from `diagrams` library
3. Define your architecture using context managers
4. Run the script to generate PNG output
Example:
```python
from diagrams import Diagram, Cluster
from diagrams.onprem.network import Router
from diagrams.generic.device import Mobile
with Diagram("My Network", show=False, filename="my_network"):
router = Router("Gateway")
device = Mobile("Phone")
device >> router
```
### Testing Locally
```bash
# Generate diagrams
python lan_architecture.py
# View output
ls -la *.png
# Test with local web server
python -m http.server 8000 --directory public/
# Open: http://localhost:8000
```
### Available Icons
The `diagrams` library provides icons from multiple providers:
- **OnPrem**: Network, compute, storage, etc.
- **Cloud**: AWS, Azure, GCP services
- **Generic**: Network devices, blank nodes
- **Custom**: Use your own images
See: [Diagrams Documentation](https://diagrams.mingrammer.com/docs/nodes/overview)
---
## Deployment Guide
### Overview
The project uses a fully automated Docker-based deployment pipeline:
1. **Develop** on local machine
2. **Commit & Push** to Gitea
3. **Auto-Deploy** via post-receive hook
4. **Build** multi-stage Docker image
5. **Serve** via Traefik reverse proxy
### Deployment Steps
#### 1. Initial Setup
```bash
# On server: Create app structure
apps-create diagram static-fe
# This creates:
# - /opt/apps/diagram (git repository)
# - /home/tour/infra/diagram/docker-compose.yml
```
#### 2. Configure Gitea Hook
In repository **Settings → Git Hooks → post-receive**:
```bash
#!/usr/bin/env bash
/usr/local/bin/app-deploy diagram
```
#### 3. Deploy
Simply push to Gitea:
```bash
git push origin main
```
The server automatically:
- Pulls latest code
- Rebuilds Docker image
- Restarts container
- Updates live site at https://diagram.appmodel.nl
### Manual Deployment
If needed:
```bash
# On server
app-deploy diagram
# Or step-by-step
cd /opt/apps/diagram
git pull
cd /home/tour/infra/diagram
docker compose up -d --build diagram
```
### Monitoring
```bash
# View deployment logs
tail -f /var/log/app-deploy-diagram.log
# View container logs
cd /home/tour/infra/diagram
docker compose logs -f diagram
# Check container status
docker compose ps
```
---
## Architecture Overview
### Infrastructure
```
┌─────────────────────────────────────────────┐
│ Production Architecture │
├─────────────────────────────────────────────┤
│ │
│ ┌──────────────┐ │
│ │ Gitea │ (Source of Truth) │
│ │ Tour/diagram │ │
│ └──────┬───────┘ │
│ │ git push │
│ ↓ │
│ ┌──────────────┐ │
│ │ Post-Receive │ (Auto-trigger) │
│ │ Hook │ │
│ └──────┬───────┘ │
│ │ app-deploy diagram │
│ ↓ │
│ ┌──────────────────────┐ │
│ │ /opt/apps/diagram/ │ │
│ │ (Git Repository) │ │
│ └──────┬───────────────┘ │
│ │ git pull │
│ ↓ │
│ ┌──────────────────────┐ │
│ │ Docker Build Process │ │
│ │ ┌─────────────────┐ │ │
│ │ │ Stage 1: Build │ │ │
│ │ │ - Python │ │ │
│ │ │ - Graphviz │ │ │
│ │ │ - Generate PNGs │ │ │
│ │ └─────────────────┘ │ │
│ │ ┌─────────────────┐ │ │
│ │ │ Stage 2: Serve │ │ │
│ │ │ - Nginx │ │ │
│ │ │ - Static files │ │ │
│ │ └─────────────────┘ │ │
│ └──────┬───────────────┘ │
│ │ container starts │
│ ↓ │
│ ┌──────────────────────┐ │
│ │ diagram-viewer │ │
│ │ Container :80 │ │
│ └──────┬───────────────┘ │
│ │ traefik_net │
│ ↓ │
│ ┌──────────────────────┐ │
│ │ Traefik │ │
│ │ Reverse Proxy │ │
│ │ + Let's Encrypt │ │
│ └──────┬───────────────┘ │
│ │ HTTPS │
│ ↓ │
│ diagram.appmodel.nl │
│ │
└─────────────────────────────────────────────┘
```
### Network Topology
The diagram viewer documents our home lab infrastructure:
- **LAN 192.168.1.0/24**: Main network
- Core server (192.168.1.159): Traefik, Gitea, Dokku, Auction stack, MI50/Ollama
- DNS server (192.168.1.163): AdGuard, Artifactory, CI runner
- Home Assistant (192.168.1.193)
- Atlas worker (192.168.1.100)
- IoT devices
- **Tether 192.168.137.0/24**: Isolated subnet
- Hermes worker (192.168.137.239)
- Plato worker (192.168.137.163)
### Services
| Service | URL | Description |
|---------|-----|-------------|
| Diagram Viewer | https://diagram.appmodel.nl | This application |
| Gitea | https://git.appmodel.nl | Git hosting |
| Auction Frontend | https://auction.appmodel.nl | Auction platform |
| Aupi API | https://aupi.appmodel.nl | Backend API |
| Dokku | https://dokku.lan | PaaS platform |
---
## Additional Resources
### Related Documentation
- [DEPLOY_SERVER_SETUP.md](../DEPLOY_SERVER_SETUP.md) - Detailed deployment guide
- [DEPLOYMENT_GUIDE.md](../DEPLOYMENT_GUIDE.md) - General deployment pipeline
- [README.md](../README.md) - Project overview
### External Links
- [Diagrams Library](https://diagrams.mingrammer.com/)
- [Graphviz](https://graphviz.org/)
- [Mermaid.js](https://mermaid.js.org/) (used in live editor)
- [Traefik Documentation](https://doc.traefik.io/traefik/)
- [Docker Compose](https://docs.docker.com/compose/)
### Contributing
To contribute to this project:
1. Create a feature branch
2. Make your changes
3. Test locally
4. Submit a pull request in Gitea
5. Wait for automatic deployment after merge
---
## Troubleshooting
### Common Issues
#### Diagrams Not Generating
**Problem**: Python script fails to generate PNG files
**Solution**:
```bash
# Check Graphviz installation
dot -V
# Reinstall if needed
# macOS: brew install graphviz
# Ubuntu: sudo apt-get install graphviz
# Windows: choco install graphviz
# Verify Python dependencies
pip list | grep diagrams
pip install --upgrade diagrams
```
#### Container Build Fails
**Problem**: Docker build fails during deployment
**Solution**:
```bash
# Check deployment logs
tail -f /var/log/app-deploy-diagram.log
# Rebuild manually with verbose output
cd /home/tour/infra/diagram
docker compose build --no-cache --progress=plain diagram
```
#### Site Not Accessible
**Problem**: Container runs but site not reachable
**Solution**:
1. Check DNS: `nslookup diagram.appmodel.nl`
2. Verify Traefik labels: `docker inspect diagram-viewer | grep traefik`
3. Check Traefik logs: `docker logs traefik`
4. Test container directly: `curl http://localhost:PORT`
#### Changes Not Reflected
**Problem**: Pushed changes but site unchanged
**Solution**:
```bash
# Force rebuild on server
cd /home/tour/infra/diagram
docker compose down
docker compose up -d --build --force-recreate diagram
# Clear browser cache
# Ctrl+Shift+R (Windows/Linux) or Cmd+Shift+R (macOS)
```
---
## Contact & Support
For issues, questions, or suggestions:
1. Check this wiki
2. Review [DEPLOY_SERVER_SETUP.md](../DEPLOY_SERVER_SETUP.md)
3. Check container logs
4. Contact the infrastructure team
---
**Last Updated**: 2025-12-02
**Version**: 1.0.0
**Maintainer**: Tour