How can the community container “calcardbakcup” be set up?

[Lassa333]

Hello everyone,

I'm just starting to play around with a new instance of Nextcloud AIO. The instance is running smoothly and I've successfully added the calcardbackup container.

My question:
How exactly can I configure the calendar/contacts backup? I'd like to activate a few more options that are mentioned on GitHub (https://codeberg.org/BernieO/calcardbackup):

-o | --output DIRECTORY
-one | --one-file-per-component
-r | --remove N
-x | --uncompressed

Can anyone give me step-by-step instructions on how to do this?

BR
Lassa

[szaimen]

Hi, the container is auto-configured. See https://github.com/nextcloud/all-in-one/blob/main/community-containers/calcardbackup/calcardbackup.json

However we can think about adjusting the defaults if it makes sense. Can you please explain why you want to adjust things and what makes the difference?

[Lassa333]

Hi Simon, Since I couldn't find where the backup is stored, I would like to specify the location myself. Especially since I have an external hard drive that I use as “external storage” in Nextcloud. I would like to store the backups on this hard drive. Furthermore, I would like to save the backups as individual files (calendar as *.ics and contacts as *.vcf) rather than as archives. Can you help me with this? BR Roland Von: Simon L. ***@***.***> Gesendet: Montag, 16. Februar 2026 08:39 An: nextcloud/all-in-one ***@***.***> Cc: Lassa333 ***@***.***>; Author ***@***.***> Betreff: Re: [nextcloud/all-in-one] How can the community container “calcardbakcup” be set up? (Discussion #7598) Hi, the container is auto-configured. See https://github.com/nextcloud/all-in-one/blob/main/community-containers/calcardbackup/calcardbackup.json However we can think about adjusting the defaults if it makes sense. Can you please explain why you want to adjust things and what makes the difference? — Reply to this email directly, view it on GitHub <#7598 (comment)> , or unsubscribe <https://github.com/notifications/unsubscribe-auth/BIETLPHN6YPECAZ2M4FHT6L4MFX2PAVCNFSM6AAAAACVGD454CVHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTKOBSGAZTKMY> . You are receiving this because you authored the thread. <https://github.com/notifications/beacon/BIETLPC4IJXIFWMCRMMVC5L4MFX2PA5CNFSM6AAAAACVGD454CWGG33NNVSW45C7OR4XAZNRIRUXGY3VONZWS33OINXW23LFNZ2KUY3PNVWWK3TUL5UWJTQA6FTEC.gif> Message ID: ***@***.*** ***@***.***> >

[szaimen]

Hey, the backup files are stored in the docker volume nextcloud_aio_calcardbackup.
See

all-in-one/community-containers/calcardbackup/calcardbackup.json

Lines 22 to 23 in 58e5d85

	"source": "nextcloud_aio_calcardbackup",
	"destination": "/backup",

[Lassa333]

Hi, Cool, thanks for your help with this point :) I've already found the json. Would that be the place to change the settings? I'm guessing that the item "CALCARD_OPTS=" can be expanded? For example: "CALCARD_OPTS=-x -o /mnt/hdd/backupfolder/ -r 5" That would mean the following: The backup would not be saved as an archive. Storage location: /mnt/hdd/backupfolder. All backups older than 5 days would be deleted. Am I right? BR Lassa Von: Simon L. ***@***.***> Gesendet: Montag, 16. Februar 2026 09:55 An: nextcloud/all-in-one ***@***.***> Cc: Lassa333 ***@***.***>; Author ***@***.***> Betreff: Re: [nextcloud/all-in-one] How can the community container “calcardbakcup” be set up? (Discussion #7598) Hey, the backup files are stored in the docker volume nextcloud_aio_calcardbackup. See https://github.com/nextcloud/all-in-one/blob/58e5d8534b115614c9333966694ac767ecb9a6d9/community-containers/calcardbackup/calcardbackup.json#L22-L23 — Reply to this email directly, view it on GitHub <#7598 (reply in thread)> , or unsubscribe <https://github.com/notifications/unsubscribe-auth/BIETLPDRQ6S5DWYD2ZYJY5T4MGAWFAVCNFSM6AAAAACVGD454CVHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTKOBSGEZDIMQ> . You are receiving this because you authored the thread. <https://github.com/notifications/beacon/BIETLPDDQNVSSL3A6BLROIT4MGAWFA5CNFSM6AAAAACVGD454CWGG33NNVSW45C7OR4XAZNRIRUXGY3VONZWS33OINXW23LFNZ2KUY3PNVWWK3TUL5UWJTQA6FU3U.gif> Message ID: ***@***.*** ***@***.***> >

[szaimen]

I've already found the json. Would that be the place to change the settings?

It is currently not possible to change the default settings.

[Lassa333]

Hmm, OK. Is this something that could be implemented in the future? I could imagine that (similar to the master container) there could be a customized Docker call or a docker-compose.yml with the desired settings? Von: Simon L. ***@***.***> Gesendet: Montag, 16. Februar 2026 10:15 An: nextcloud/all-in-one ***@***.***> Cc: Lassa333 ***@***.***>; Author ***@***.***> Betreff: Re: [nextcloud/all-in-one] How can the community container “calcardbakcup” be set up? (Discussion #7598) I've already found the json. Would that be the place to change the settings? It is currently not possible to change the default settings. — Reply to this email directly, view it on GitHub <#7598 (reply in thread)> , or unsubscribe <https://github.com/notifications/unsubscribe-auth/BIETLPGDAZPZJN4TROJZVM34MGDAZAVCNFSM6AAAAACVGD454CVHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTKOBSGE2DONA> . You are receiving this because you authored the thread. <https://github.com/notifications/beacon/BIETLPFXVG2IRH2APK2BZFT4MGDAZA5CNFSM6AAAAACVGD454CWGG33NNVSW45C7OR4XAZNRIRUXGY3VONZWS33OINXW23LFNZ2KUY3PNVWWK3TUL5UWJTQA6FVKE.gif> Message ID: ***@***.*** ***@***.***> >

[Lassa333]

Hello,

I was now able to check the container:
Unfortunately, no "backups" folder was created with in the container, and today's backup was not saved.

Here is the log from the backup-run tonight:

backup-failed log.bmp

[szaimen]

This looks like the backup was done correctly.

Have you checked the contents of the nextcloud_aio_calcardbackup docker volume?

[Lassa333]

Although the log documented a successful run, no corresponding folder or backup was created inside the container.

Do you have an idea?

[szaimen]

You checked the wrong location afaics.

Can you post the output of sudo docker volume inspect nextcloud_aio_calcardbackup here?

[Lassa333]

sure:

[Lassa333]

You were right: the backups are saved within the volume.

And can be found via the path to "/var/lib/docker/volumes/nextcloud_aio_calcardbackup/_data"