Backup permission issue

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The Basics

  • Nextcloud Server version (e.g., 29.x.x):
    • Nextcloud AIO v9.8.0
  • Operating system and version (e.g., Ubuntu 24.04):
    • Almalinux 9.4
  • Web server and version (e.g, Apache 2.4.25):
    • AIO image, so some apache version?
  • Reverse proxy and version _(e.g. nginx 1.27.2)
    • HAProxy 2.8.11
  • PHP version (e.g, 8.3):
    • AIO version
  • Is this the first time you’ve seen this error? (Yes / No):
    • Yes
  • When did this problem seem to first start?
    • After migrating the storage
  • Installation method (e.g. AIO, NCP, Bare Metal/Archive, etc.)
    • AIO
  • Are you using Cloudflare, mod_security, or similar? (Yes / No)
    • No

Summary of the issue you are facing:

I’m getting an error on my backup. This seems to be a permissions issue.

Log entries

2024-11-19T00:01:31.278251098Z The .ncdata or .ocdata file is missing in Nextcloud datadir which means it is invalid!
2024-11-19T00:01:31.278317828Z Is the drive where the datadir is located on still mounted?
2024-11-19T00:01:33.968578472Z touch: /nextcloud_aio_volumes/nextcloud_aio_nextcloud_data/skip.update: Permission denied
2024-11-19T00:01:33.969338788Z chmod: /nextcloud_aio_volumes/nextcloud_aio_nextcloud_data/skip.update: Permission denied

So let’s take a look at those permissions:

┌[kclijsters☮srv-malmok]-(/Server/Docker)-[git://main ✗]-
└> ls -la /mnt/NAS/Backups/Nextcloud/     
total 10
drwxrwxrwx 3 www-data root   3 Oct 17 14:57 .
drwxrwxrwx 4 docker   docker 4 Nov 13 11:09 ..
drwxrwxrwx 3 root     root   9 Nov 19 01:01 borg

The Permissions are world readable ( Don’t worry, I did this for debugging reasons

Maybe it’s the ncdata or ocdata it is complaining about?

[www-data@srv-malmok Nextcloud]$ ls -la
total 74
drwxr-x--- 13 www-data root  19 Nov 19 01:02 .
drwxrwxrwx  3 www-data tape   3 Nov 13 15:28 ..
drwxr-x---  4 www-data root   4 Nov 25  2022 admin
drwxr-x--- 18 www-data root  18 Apr 14  2024 appdata_ocloyyd7j8bb
-rwxr-x---  1 www-data root   0 Nov 13 15:18 audit.log
drwxr-x---  8 www-data root   8 May 20  2024 christel
drwxr-x---  3 www-data root   3 Feb 23  2024 files_encryption
drwxr-x---  2 www-data root   3 Jul  2 02:18 files_external
-rwxr-x---  1 www-data root   0 Nov 13 15:18 fts-index.done
drwxr-x---  6 www-data root   6 Feb 23  2024 __groupfolders
-rwxrwxrwx  1 www-data root 542 Nov 13 15:18 .htaccess
drwxr-x---  5 www-data root   5 Jul 29  2023 Ilse
-rwxr-x---  1 www-data root   0 Nov 13 15:18 index.html
drwxr-x---  7 www-data root   7 Jul 30 11:02 inge
drwxr-x---  8 www-data root   8 Feb 23  2024 karel
drwxr-x---  8 www-data root   8 Dec 18  2022 marie
-rwxrwxrwx  1 www-data root  52 Nov 13 15:18 .ncdata
-rwxr-x---  1 www-data root   0 Nov 13 15:18 nextcloud.log
drwxr-x---  7 www-data root   7 Feb 23  2024 Wim
[www-data@srv-malmok Nextcloud]$ cat .ncdata 
# Nextcloud data directory
# Do not change this file[www-data@srv-malmok Nextcloud]$ pwd
/mnt/Cloud/Nextcloud

doens’t seem to be an issue either… I’m really confused about this. Anyone here have an idea?

2

Hi, is your data dir on a nfs share and is roor access permitted?

3

My data dir is on an nfs share, these persmissions:

[www-data@srv-malmok Cloud]$ ls -la
total 9
drwxrwxrwx   3 www-data tape  3 Nov 13 15:28 .
drwxr-xr-x.  7 root     root 71 Nov  7 10:03 ..
drwxr-x---  13 www-data root 19 Nov 19 01:02 Nextcloud
4
5

Well there you are…
I am using Truenas. I had to set the maproot user and group to nobody:wheel respectively. I did that for both the data and backup nfs shares.
Thanks a million!

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