Another AIO backup issue

ℹ️ Support 📦 Appliances (Docker, Snappy, VM, NCP, AIO)
, ,
1

Nextcloud AIO v11.2.1 running in a Proxmox LXC via Docker with

sudo docker run --sig-proxy=false --name nextcloud-aio-mastercontainer --restart always --publish 8080:8080 --env APACHE_PORT=11000 --env APACHE_IP_BINDING=0.0.0.0 --volume nextcloud_aio_mastercontainer:/mnt/docker-aio-config --volume /var/run/docker.sock:/var/run/docker.sock:ro nextcloud/all-in-one:latest

I want to set up Borg backups to get automatic updates. I want to store it to my NAS.

Mount point on both Proxmox host and the LXC at /mnt/nc-backups like this in the .conf file:
mp0: /mnt/nc-backups,mp=/mnt/nc-backups

The folder is writable from both the host and the LXC. I set this path in the AIO GUI as a Local Backup Location. Backup fails with:

2025-07-07T10:49:24.760776294Z mkdir: can't create directory '/mnt/borgbackup/borg': Permission denied
2025-07-07T10:49:25.566506973Z Repository /mnt/borgbackup/borg does not exist.
2025-07-07T10:49:25.600153684Z Initializing repository...
2025-07-07T10:49:26.105452004Z using builtin fallback logging configuration
2025-07-07T10:49:26.297343438Z 33 self tests completed in 0.19 seconds
2025-07-07T10:49:26.304938765Z Local Exception
2025-07-07T10:49:26.304959312Z Traceback (most recent call last):
2025-07-07T10:49:26.304962361Z   File "/usr/lib/python3.12/site-packages/borg/archiver.py", line 5391, in main
2025-07-07T10:49:26.304964923Z     exit_code = archiver.run(args)
2025-07-07T10:49:26.304967167Z                 ^^^^^^^^^^^^^^^^^^
2025-07-07T10:49:26.304969349Z   File "/usr/lib/python3.12/site-packages/borg/archiver.py", line 5309, in run
2025-07-07T10:49:26.304971885Z     rc = func(args)
2025-07-07T10:49:26.304974077Z          ^^^^^^^^^^
2025-07-07T10:49:26.304976255Z   File "/usr/lib/python3.12/site-packages/borg/archiver.py", line 176, in wrapper
2025-07-07T10:49:26.305002160Z     with repository:
2025-07-07T10:49:26.305004512Z          ^^^^^^^^^^
2025-07-07T10:49:26.305006660Z   File "/usr/lib/python3.12/site-packages/borg/repository.py", line 215, in __enter__
2025-07-07T10:49:26.305008972Z     self.create(self.path)
2025-07-07T10:49:26.305011154Z   File "/usr/lib/python3.12/site-packages/borg/repository.py", line 306, in create
2025-07-07T10:49:26.305013506Z     os.mkdir(path)
2025-07-07T10:49:26.305015667Z PermissionError: [Errno 13] Permission denied: '/mnt/borgbackup/borg'
2025-07-07T10:49:26.305017898Z 
2025-07-07T10:49:26.305020089Z Platform: Linux 437b3cb87156 6.8.12-11-pve #1 SMP PREEMPT_DYNAMIC PMX 6.8.12-11 (2025-05-22T09:39Z) x86_64
2025-07-07T10:49:26.305022388Z Linux: Unknown Linux  
2025-07-07T10:49:26.305024576Z Borg: 1.4.0  Python: CPython 3.12.11 msgpack: 1.0.8 fuse: llfuse 1.5.1 [pyfuse3,llfuse]
2025-07-07T10:49:26.305026815Z PID: 35  CWD: /
2025-07-07T10:49:26.305028989Z sys.argv: ['/usr/bin/borg', 'init', '--debug', '--encryption=repokey-blake2']
2025-07-07T10:49:26.305031283Z SSH_ORIGINAL_COMMAND: None
2025-07-07T10:49:26.305033447Z 
2025-07-07T10:49:26.339539953Z Could not initialize borg repository.

Any tips? Thanks!

1 Like
2

Is this an nfs mountpoint? If so you need to disable the squashroot feature (IIRC it is called like that) so that the root user can access the share

3

no, it’s a SMB mount

4

(post deleted by author)

5

It looks like a permissions issue inside the container. Even though /mnt/nc-backups is mounted and writable from the host and LXC, the Borg process inside the Docker container likely doesn’t have write access to /mnt/borgbackup/borg. Try:

  1. Ensuring correct ownership/permissions (chmod 777 or chown -R 1000:1000 for testing).
  2. Verifying the backup path in AIO GUI is /mnt/nc-backups/borg, not /mnt/borgbackup/borg.
  3. Avoiding paths outside the declared mount (/mnt/nc-backups).

Let us know if setting the correct path and permissions helps.

6

Done.

AIO backup log then says
2025-07-08T05:01:17.717802128Z /mnt/borgbackup is not a mountpoint which is not allowed.

That seems super weird to me. /mnt/nc-backups is mounted in the LXC and writable. Thanks for your time btw.

7

Hi, just to make this clear: the configured backup directory is inside the borg container always mounted to /mnt/borgbackup. See all-in-one/php/containers.json at 362cad79dbfb0ec0c803111d62d51ff1e18d0143 · nextcloud/all-in-one · GitHub

8

… so the path in the log is always /mnt/borgbackup. Okay, gotcha. Still, I’m getting this error.

From within the LXC, I can write to the mount point (/mnt/nc-backups), the same path is also set in the AIO GUI. I did sudo chown -R 1000:1000 /mnt/nc-backups from inside the LXC.

Regardless if I set there /mnt/nc-backups or /mnt/nc-backups/borg, I always get the same error (/mnt/borgbackup is not a mountpoint which is not allowed.).

9

Ha! Backup is happening. The AIO UI is super weird - I ALWAYS get the error above (/mnt/borgbackup is not a mountpoint which is not allowed) when I enter the path and push “Set backup location again”, BUT when I just press “Create Backup now” down below, the backup does get created. WTF

Let’s see if this sticks. Thanks for now!