Set Datadir, Docker Volume. Windows Server 2025

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The Basics

  • Nextcloud Server version (e.g., 29.x.x):
    • 32.0.3.2
  • Operating system and version (e.g., Ubuntu 24.04):
    • Windows Server 2025
  • Web server and version (e.g, Apache 2.4.25):
    • Apache
  • Reverse proxy and version _(e.g. nginx 1.27.2)
    • Nginx Proxy Manager
  • PHP version (e.g, 8.3):
    • PHP
  • Is this the first time you’ve seen this error? (Yes / No):
    • Yes
  • When did this problem seem to first start?
    • When trying to install
  • Installation method (e.g. AlO, NCP, Bare Metal/Archive, etc.)
    • AIO / Docker
  • Are you using CloudfIare, mod_security, or similar? (Yes / No)
    • No

Summary of the issue you are facing:

I’m Trying to install docker with the AIO package. That all works fine.

The only thing is im trying to set my datadir as a external share that runs on my truenas server.

I run windows server 2025 with docker engine and docker compose. I also have WSL installed.

In the compose.yaml i made a new volume that links to my share(see photo).

But when i try to set that volume as my netxloud_datadir i get the error that my datadir needs to start with a “/”. But how can i do that if it needs to link to the docker volume?

My master container also links to that volume(see photo). When i enter my mastercontainer and cd to its location i can see the files.

So my question is what is the right way to set the datadir for my nextclou-aio-nextcloud container?

Annotation 2026-01-14 144433
Annotation 2026-01-14 1444331479×550 145 KB

2

Hi, please carefully read through GitHub - nextcloud/all-in-one: 📦 The official Nextcloud installation method. Provides easy deployment and maintenance with most features included in this one Nextcloud instance.

3

Thanks for the quick reply. I did try what the docs says but that also doesn’t seem to work.

I’m trying to mount my N drive. This drive is a networkshare.

But when i try to mount it using devices: “/host_mnt/N/data” i get this error:

Error response from daemon: error while mounting volume ‘/var/lib/docker/volumes/nextcloudaio_nextcloud_aio_nextcloud_datadir/_data’: failed to mount local volume: mount /run/desktop/mnt/host/N/data:/var/lib/docker/volumes/nextcloudaio_nextcloud_aio_nextcloud_datadir/_data, flags: 0x1000: no such file or directory

Compose.yaml

services:
  nextcloud-aio-mastercontainer:
    image: ghcr.io/nextcloud-releases/all-in-one:latest
    init: true
    restart: always
    container_name: nextcloud-aio-mastercontainer # This line is not allowed to be changed.
    network_mode: bridge
    volumes:
      - nextcloud_aio_mastercontainer:/mnt/docker-aio-config # This line is not allowed to be changed.
      - /var/run/docker.sock:/var/run/docker.sock:ro
      - nextcloud_aio_nextcloud_datadir:/mnt/nextcloud
    ports:
      - 8080:8080
    environment:
      APACHE_PORT: 11000 # Use this port in Nginx Proxy Manager
      # NC_TRUSTED_PROXIES: 192.168.1.30  # this is the NPM proxy ip address in the docker network !
      FULLTEXTSEARCH_JAVA_OPTIONS: "-Xms1024M -Xmx4096M"
      NEXTCLOUD_DATADIR: "nextcloud_aio_nextcloud_datadir" # ⚠️ Warning: do not set or adjust this value after the initial Nextcloud installation is done!
      # NEXTCLOUD_MOUNT: /mnt/ # Allows the Nextcloud container to access the chosen directory on the host.
      NEXTCLOUD_UPLOAD_LIMIT: 1028G
      NEXTCLOUD_MAX_TIME: 7200
      NEXTCLOUD_MEMORY_LIMIT: 4096M
      NEXTCLOUD_ENABLE_DRI_DEVICE: false # Intel QuickSync
      SKIP_DOMAIN_VALIDATION: false # This should only be set to true if things are correctly configured. 
      TALK_PORT: 3478 # This allows to adjust the port that the talk container is using which is exposed on the host. See https://github.com/nextcloud/all-in-one#how-to-adjust-the-talk-port

volumes:
  nextcloud_aio_mastercontainer:
    name: nextcloud_aio_mastercontainer # This line is not allowed to be changed.
  nextcloud_aio_nextcloud_datadir:
    driver: local
    driver_opts:
      type: none
      device: "/host_mnt/N/data"
      o: "bind"

Drive
Drive870×506 61.1 KB

4

Is N:\ an external drive or an internal one?

1 Like
5

Btw, have you already tried “/host_mnt/n/data” (so with small n)? Also does the data folder exist on that drive?

1 Like