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Mozilla Syncserver Mozilla Syncserver

Container

Tools

Run-Your-Own Firefox Sync Server

Image details

Pulls: 11.5M
Architecture: amd64
Image size: 139 MB
Latest: 1.9.1
User: mozilla
Created: May 11, 2017
Updated: 4 years ago
Status: archived

Configuration

Type
Container
Image
mozilla/syncserver:latest
Ports
5000/tcp
Volumes
/data : /opt/mediadepot/apps/syncserver
Env vars
SYNCSERVER_PUBLIC_URL=https://syncserver.depot.lanSYNCSERVER_SECRET_FILE=/data/secret_keySYNCSERVER_SQLURI=sqlite:////data/syncserver.dbSYNCSERVER_BATCH_UPLOAD_ENABLED=trueSYNCSERVER_FORCE_WSGI_ENVIRON=falsePORT=5000
Labels
traefik.enable=truetraefik.http.services.syncservere.loadbalancer.server.port=5000traefik.http.routers.syncserver.entrypoints=websecuretraefik.http.routers.syncserver.tls.certresolver=mydnschallenge

Template by mediadepot

Standalone Install

Select an install method, to see config/commands for deploying Mozilla Syncserver

Installation method

Install on Portainer

Import all app templates into your Portainer instance, for easy 1-click deploys

  1. Ensure both Docker and Portainer are installed, and up-to-date
  2. Log into your Portainer web UI
  3. Under Settings → App Templates, paste the below URL
  4. Head to Home → App Templates, and the list of apps will show up
  5. Select Mozilla Syncserver, fill in any config options, and hit Deploy

Template Import URL

https://raw.githubusercontent.com/Lissy93/portainer-templates/main/templates.json
Show Me demo

More install options in our documentation.

Serve Mozilla Syncserver on your own domain behind Caddy, Nginx or Traefik. Fill in your domain and copy the result. It's a starting point, some apps need their own base URL or extra headers set too.

Proxying mozilla-syncserver.example.com to http://syncserver:5000

Add this to your Caddyfile

mozilla-syncserver.example.com {
	reverse_proxy http://syncserver:5000
}

Check the logs first

Nine times out of ten the logs tell you exactly what went wrong.

  • In Portainer, go to Containers, click the container, then Logs. Or run docker logs syncserver
  • Exit codes help too: 137 means killed, usually out of memory. 126 or 127 means the command inside the image is broken.

Published on a random port

This template exposes 5000/tcp without setting a host port, so Docker picks a random free one on every deploy.

  • Find it in the Ports column of Portainer's container list, or with docker port syncserver

Permission denied on volumes

If the logs show "permission denied", the app can't write to its data folder on the host.

  • Fix the ownership: sudo chown -R 1000:1000 /opt/mediadepot/apps/syncserver

Image won't pull

Test the pull directly on the host: docker pull mozilla/syncserver:latest

  • "manifest unknown" means the tag no longer exists. This template uses latest, so try pinning a specific version instead.
  • "toomanyrequests" is the Docker Hub rate limit. Log in with docker login to raise it.
  • "no space left on device" means a full disk. Reclaim space with docker system prune

"exec format error"

This means the image was built for a different CPU architecture than your server.

  • This image supports: amd64
  • Check yours with uname -m: x86_64 is amd64, aarch64 is arm64. Raspberry Pi and other ARM boards are the usual culprits.

Raise an issue

Found something which isn't working as it should? Here's how to report it.

A single container

Mozilla Syncserver runs as one container, the simplest kind of app here. Just the one image to pull and nothing else wired up alongside it.

The app image

An image is the app packed up ready to go, everything Mozilla Syncserver needs bundled into one download. This template pulls mozilla/syncserver:latest, which Docker fetches once (about 139 MB) and then starts your own copy from.

Where the image comes from

Docker pulls its images from registries, public libraries of ready-built apps. Mozilla Syncserver's comes from Docker Hub, published by mozilla.

Version tags

The bit after the colon in the image name is the version tag. Here it's latest, which always points at the newest build, so a redeploy can bump you to a newer release without you asking. Newest right now is 1.9.1. Pin a specific tag if you would rather stay on one version.

Which machines it runs on

Every image is built for particular CPU types. This one ships for amd64, so it runs on regular x86 PCs and servers, though not ARM boards like a Raspberry Pi.

Ports

A port is the door the app answers on. Here the app exposes a port but leaves the host side blank, so Docker picks a free one for you. It opens:

  • 5000, published on a random host port

Volumes

A volume is where Mozilla Syncserver keeps its files so they survive an update or a restart. Without one, anything it saves would sit inside the container and vanish the moment it's recreated. This template mounts:

  • /data from /opt/mediadepot/apps/syncserver on the host

Environment variables

Environment variables are the settings you hand over when you deploy, things like a password or a timezone. Mozilla Syncserver takes 6 of them, all with defaults you can leave alone or tweak:

  • SYNCSERVER_PUBLIC_URL, defaults to https://syncserver.depot.lan
  • SYNCSERVER_SECRET_FILE, defaults to /data/secret_key
  • SYNCSERVER_SQLURI, defaults to sqlite:////data/syncserver.db
  • SYNCSERVER_BATCH_UPLOAD_ENABLED, defaults to true
  • SYNCSERVER_FORCE_WSGI_ENVIRON, defaults to false
  • PORT, defaults to 5000

Networking

Nothing custom is set, so Mozilla Syncserver sits on Docker's default bridge network: its own private space that reaches the outside world only through the ports it publishes.

Container name

Once it's deployed, Portainer names the container syncserver. That's what you'll spot in the containers list and use in commands like docker logs syncserver.

Labels

Labels are small notes pinned to the container. They don't change how Mozilla Syncserver behaves, but other tools read them, most often a reverse proxy like Traefik working out which apps to route where. This template sets:

  • traefik.enable=true
  • traefik.http.services.syncservere.loadbalancer.server.port=5000
  • traefik.http.routers.syncserver.entrypoints=websecure
  • traefik.http.routers.syncserver.tls.certresolver=mydnschallenge

Portainer app templates

Zooming out, this whole page comes from a Portainer app template: a short recipe telling Portainer how to set Mozilla Syncserver up. Add the template list to Portainer once, then deploying Mozilla Syncserver is a click rather than a wall of config.