How to self-host Duplicati

Scheduled, encrypted backups of your files to your own cloud storage. Cresdock runs it on a server you own, from a catalogue, with no Docker and no reverse proxy to configure.

What Cresdock does for you with Duplicati

• Its configuration is written before the container ever starts, so Duplicati comes up already set up rather than showing you a blank first-run form.

• Given its own web address, still behind your panel login. Duplicati can't live under a shared path, but it can see your files — so the panel gate stays in front of it.

• Your Downloads and Media folders are already mounted, and they are the SAME folders your other apps see — so files land where the rest of your setup expects them, with no path mapping to work out.

• Duplicati takes copies on a schedule, so something you've set up can be put back the way it was.

• What's worth copying is what your apps keep for themselves — your downloads and media are far too large for that, and stay where they are.

Why run Duplicati yourself

Cloud storage is rented, priced per month forever, and readable by whoever runs it. The same files on a server you own cost what the disk cost.

What kind of server Duplicati needs

Light on power, heavy on disk — sizing is really a question of how much you want to keep. If your library outgrows the server, Cresdock can put it on cloud storage and keep it looking like a normal folder.

Cresdock itself is undemanding — it runs on a small rented server, an old desktop or a mini PC, on Ubuntu or Debian. Everything it installs shares that machine, so the honest question is not "will this app run" but "how much am I going to put on here in total".

Where to run Duplicati

Duplicati runs wherever Cresdock runs, and the choice is about the machine, not the app:

• At home, on hardware you already own. A mini PC, an old desktop or a NAS that can run Debian. Cresdock works behind a home router with no port forwarding and no domain, so Duplicati is reachable on your own network first and from outside only if you choose.
• On a rented server. A small VPS is enough for most apps and is the usual answer when Duplicati should be reachable from anywhere. The setup guide covers the specs and the one-command install.
• Through a provider that runs Cresdock. Hosting companies deploy Cresdock workspaces for their customers, so Duplicati can come with a server you rent rather than one you set up — ask your provider, or see how providers offer it.

Installing Duplicati

1. Put Cresdock on a server

   One line on any Ubuntu or Debian machine — a rented VPS, a spare PC, a home server. It sets itself up.

2. Pick Duplicati from the catalogue

   Click Install. The panel pulls the image, writes the configuration, gets a certificate and starts it.

3. Open it from your dashboard

   Its address and any login details are on its card. Start, stop, update, roll back or remove it from the same place, any time.

What's left for you to do

Cresdock does not pretend to do the parts that are genuinely yours to decide. After it's running:

• Open Duplicati and set up your first backup job to your own cloud storage

What this replaces

Doing it by hand means writing something like this, then keeping it working:

services:
  duplicati:
    image: lscr.io/linuxserver/duplicati:v2.3.0.4_stable_2026-07-09-ls302
    restart: unless-stopped
    ports:
      - "8200:8200"
    environment:
      - PUID=1000
      - PGID=1000
      - TZ=Etc/UTC
    volumes:
      - ./duplicati/config:/config
      - ./downloads:/downloads
      - ./media:/media

And that is the easy half. Still to do:

• Install a reverse proxy and write a server block for it

• Get a TLS certificate and set up automatic renewal

• Create the folders above with the right ownership, or it will not start

• Point a DNS record at the server, because Duplicati cannot run under a shared path

• Repeat all of it for the next app, and again on every server rebuild

On Cresdock, Duplicati is one click and none of the above exists.

Looking for what Duplicati itself can do? That lives in its own documentation — this page is only about running it.

Pairs well with: File Browser  ·  Migration Tool  ·  Emby

Before you start: where to rent a server  ·  what it needs to run  ·  Cresdock vs CasaOS