# Discord in Docker with X11

Run Discord desktop application inside a Docker container with X11 forwarding for display and PulseAudio for sound.

## 📋 Features

- ✅ Discord desktop app running in an isolated container
- ✅ X11 forwarding for GUI display
- ✅ PulseAudio support for audio
- ✅ Hardware acceleration support
- ✅ Persistent configuration storage
- ✅ Camera/video device support
- ✅ Non-root user for security
- ✅ Easy deployment with Docker Compose

## 🚀 Quick Start

### Prerequisites

- Docker (20.10 or higher)
- Docker Compose (1.29 or higher)
- X11 server running on your host
- PulseAudio running on your host

### Installation

1. **Clone or download this repository**

2. **Ensure you have the Discord .deb package**
   
   The project expects `discord-0.0.112.deb` in the project root. If you have a different version, update the `Dockerfile` accordingly.

3. **Allow X11 connections** (run this command on your host):

   ```bash
   xhost +local:docker
   ```

   > ⚠️ **Security Note**: This allows Docker containers to connect to your X server. For better security, see the [Security Considerations](#-security-considerations) section.

4. **Build and run the container**:

   ```bash
   docker-compose up -d
   ```

   Or build manually:

   ```bash
   docker build -t discord-x11 .
   docker-compose up -d
   ```

## 🎮 Usage

### Start Discord

```bash
docker-compose up -d
```

### Stop Discord

```bash
docker-compose down
```

### View logs

```bash
docker-compose logs -f
```

### Rebuild after updates

```bash
docker-compose down
docker-compose build --no-cache
docker-compose up -d
```

### Remove everything (including config)

```bash
docker-compose down -v
```

## 📁 Project Structure

```
docker-discord/
├── Dockerfile              # Container build instructions
├── docker-compose.yml      # Service orchestration
├── entrypoint.sh          # Startup script
├── discord-0.0.112.deb    # Discord installation package
├── .dockerignore          # Build context exclusions
└── README.md              # This file
```

## 🔧 Configuration

### Environment Variables

The following environment variables are used:

- `DISPLAY`: X11 display number (default: `:0`)
- `QT_X11_NO_MITSHM`: Disable MIT-SHM X11 extension
- `PULSE_SERVER`: PulseAudio server socket path

### Volumes

- `/tmp/.X11-unix`: X11 socket for GUI display
- `discord-config`: Persistent Discord configuration
- PulseAudio socket: For audio support

### Ports

The container uses `network_mode: host` to simplify networking and avoid port mapping issues with Discord's voice/video features.

## 🔍 Troubleshooting

### Discord window doesn't appear

1. Check X11 permissions:
   ```bash
   xhost +local:docker
   ```

2. Verify DISPLAY variable:
   ```bash
   echo $DISPLAY
   ```

3. Check container logs:
   ```bash
   docker-compose logs
   ```

### No sound

1. Ensure PulseAudio is running:
   ```bash
   ps aux | grep pulse
   ```

2. Verify PulseAudio socket exists:
   ```bash
   ls -la $XDG_RUNTIME_DIR/pulse/native
   ```

3. Check PulseAudio configuration allows network access

### Video/camera not working

1. Verify video devices are available:
   ```bash
   ls -la /dev/video*
   ```

2. Check user has permissions to access video devices

### Graphics performance issues

The container is configured with hardware acceleration through `/dev/dri`. If you experience issues:

1. Verify DRI devices exist:
   ```bash
   ls -la /dev/dri/
   ```

2. Check GPU drivers are properly installed on the host

### "Failed to create secure directory" error

This is usually safe to ignore, but if it persists:

```bash
docker-compose down -v
docker-compose up -d
```

## 🔒 Security Considerations

### X11 Access Control

Instead of `xhost +local:docker`, use more specific access control:

```bash
# Get container hostname
CONTAINER_ID=$(docker ps -qf "name=discord-app")
CONTAINER_HOSTNAME=$(docker inspect -f '{{.Config.Hostname}}' $CONTAINER_ID)

# Grant specific access
xhost +local:$CONTAINER_HOSTNAME
```

Or use X11 authentication:

```bash
# In docker-compose.yml, add:
environment:
  - XAUTHORITY=/tmp/.Xauthority
volumes:
  - ~/.Xauthority:/tmp/.Xauthority:ro
```

### Network Isolation

If you don't need voice/video features, consider removing `network_mode: host` and explicitly mapping required ports.

### User Permissions

The container runs Discord as a non-root user (`discord`) for improved security.

## 🆙 Updating Discord

1. Download the new `.deb` package
2. Update the `COPY` command in `Dockerfile` with the new filename
3. Rebuild:
   ```bash
   docker-compose down
   docker-compose build --no-cache
   docker-compose up -d
   ```

## 🛠️ Advanced Usage

### Custom Discord flags

Pass arguments to Discord via the entrypoint:

```bash
docker-compose run discord --enable-features=WebRTCPipeWireCapturer
```

### Running without Docker Compose

```bash
docker run -d \
  --name discord \
  --net=host \
  -e DISPLAY=$DISPLAY \
  -v /tmp/.X11-unix:/tmp/.X11-unix:rw \
  -v discord-config:/home/discord/.config/discord \
  -v $XDG_RUNTIME_DIR/pulse/native:$XDG_RUNTIME_DIR/pulse/native \
  --device /dev/dri \
  --ipc=host \
  discord-x11:latest
```

### Debug mode

Run interactively to debug issues:

```bash
docker-compose run --rm discord /bin/bash
```

## 📝 Requirements

### System Requirements

- Linux host with X11
- Docker Engine 20.10+
- Docker Compose 1.29+
- 2GB RAM minimum
- 500MB disk space

### Tested On

- Ubuntu 22.04 LTS
- Debian 12
- Arch Linux

## 🤝 Contributing

Contributions are welcome! Please feel free to submit issues or pull requests.

### Areas for Improvement

- [ ] Wayland support
- [ ] Multi-architecture builds (ARM64)
- [ ] Automated Discord updates
- [ ] Alternative audio backends (ALSA, JACK)
- [ ] Better isolation options

## 📄 License

This project is provided as-is for educational and personal use. Discord is a trademark of Discord Inc.

## ⚠️ Disclaimer

This is an unofficial Docker container for Discord. Use at your own risk. Always download Discord from official sources.

## 🔗 Resources

- [Discord Official Website](https://discord.com/)
- [Docker Documentation](https://docs.docker.com/)
- [X11 Forwarding Guide](https://www.x.org/wiki/)
- [PulseAudio Documentation](https://www.freedesktop.org/wiki/Software/PulseAudio/)

## 📧 Support

If you encounter issues:

1. Check the [Troubleshooting](#-troubleshooting) section
2. Review container logs: `docker-compose logs`
3. Search existing issues or create a new one

---

**Made with ❤️ for the Discord community**