Syncthing

🔧 What Syncthing Does

• Real-time sync between two or more devices
• Decentralized architecture — no central server, no vendor lock-in
• Encrypted transfers using TLS with perfect forward secrecy
• Cross-platform support — runs on Linux, Windows, macOS, BSD, Android, and more
• Web-based GUI for configuration and monitoring
• Automatic device discovery via local and global discovery servers
• Versioning and conflict resolution for changed files

🚀 Docker Installation Steps

1. Update your system
   sudo apt update && sudo apt upgrade -y
2. Install Docker
   

   curl -fsSL https://get.docker.com -o get-docker.sh
   sudo sh get-docker.sh

3. Install Docker Compose
   sudo apt install docker-compose-plugin
4. Add your user to the Docker group
   sudo usermod -aG docker $USER
5. Enable Docker at boot
   sudo systemctl enable docker
6. Reboot
   sudo reboot
7. Test Docker
   docker run hello-world

📁 Setup Syncthing

mkdir ~/docker
mkdir ~/docker/syncthing

🧾 Docker Compose File

In ~/docker/syncthing, on the source and target devices, create docker-compose.yml

services:
  syncthing:
    image: syncthing/syncthing:latest
    container_name: syncthing
    network_mode: host
    restart: unless-stopped
    ports:
      - "8384:8384"     # Web GUI (changed host port to avoid conflicts)
    volumes:
      - ./config:/var/syncthing/config   # Syncthing configuration
      - ./data:/var/syncthing/data       # Folder to sync
    environment:
      - PUID=1000  # Optional: host user ID
      - PGID=1000  # Optional: host group ID

▶️ Start Syncthing

From within ~/docker/syncthing on the source and target run:

📜 View Logs

🌐 Access Web Interface

Open your browser and go to "http://<SOURCE_DEVICE>:8384 and "http://<TARGET_DEVICE>:8384. You can now add a remote device in the GUI and start syncing directories.