selfhosted-apps-docker/syncthing

Syncthing

guide-by-example

Purpose & Overview

Synchronize folders between devices.

• Official
• Github

Simple and elegant solution for Synchronizing folders and nothing else.
Clients are installed on the devices, and then added to the syncthing server.

Written in Go.

Files and directory structure

/home/
└── ~/
    └── docker/
        └── syncthing/
            ├── 🗋 .env
            └── 🗋 docker-compose.yml

• .env - a file containing environment variables for docker compose
• docker-compose.yml - a docker compose file, telling docker how to run the container

Compose

docker-compose.yml

services:

  syncthing:
    image: syncthing/syncthing
    container_name: syncthing
    hostname: syncthing
    restart: unless-stopped
    env_file: .env
    volumes:
      - /mnt/mirror/syncthing:/var/syncthing
    network_mode: host
    ports:
      - 8384:8384 # Web UI
      - 22000:22000/tcp # TCP file transfers
      - 22000:22000/udp # QUIC file transfers
      - 21027:21027/udp # Receive local discovery broadcasts
  
  networks:
    default:
      name: $DOCKER_MY_NETWORK
      external: true      

.env

# GENERAL
DOCKER_MY_NETWORK=caddy_net
TZ=Europe/Bratislava

# SYNCTHING
PUID=1000
PGID=1000

Reverse proxy

Caddy v2 is used, details here.

Caddyfile

sync.{$MY_DOMAIN} {
  reverse_proxy syncthing:8384
}

First run

visit the webgui, setup username and password in settings > GUI.

• intall sync on other devices
• add folders, confirm them on webgui

sync should just start.

Trouble shooting

Update

Manual image update:

• docker compose pull
  
• docker compose up -d
  
• docker image prune