[Help] Backing up Nextcloud with Duplicati (Docker)

Comments

• GlitzyArmrest@lemmy.world ⁨9⁩ ⁨months⁩ ago

  You might try adding :rw after each of your volume paths, like this:

  volumes:
        - /path/to/appdata/config:/config:rw
  

  My honest suggestion would be to ditch Duplicati for Duplicacy. Duplicacy is one time payment, but it’s much more polished than Duplicati. I actually had major issues with recovering files from Duplicati; sometimes it would work and sometimes it wouldn’t. Not ideal for something as critical as backup software.

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  • avnrt@lemmy.world ⁨9⁩ ⁨months⁩ ago

    I’ll take a look at Duplicacy, thanks

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  • skilltheamps@feddit.de ⁨9⁩ ⁨months⁩ ago

    But it should not need write access to those files.

    I bet it is due to different UID. Nextcloud runs with the www-data user, and UID 1000 is likely whatever user OP set up on the host machine. Make Duplicati run with the same UID as nextcloud and it will have the permission to read the files.

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    • GlitzyArmrest@lemmy.world ⁨9⁩ ⁨months⁩ ago

      You are probably correct! I always forget about the UID…

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    • redcalcium@lemmy.institute ⁨9⁩ ⁨months⁩ ago

      IIRC nextcloud docker image uses UID 33 instead of 1000.

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• MangoPenguin@lemmy.blahaj.zone ⁨9⁩ ⁨months⁩ ago

  You’ve got your path backwards, do:

  /var/lib/docker/volumes:/source

  And then access the path at /source in Duplicati.

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  • avnrt@lemmy.world ⁨9⁩ ⁨months⁩ ago

    Thanks! A drop down chevron has appeared next to the “Source Data” folder in duplicati, but it is still empty, showing neither the volume, nor its contents. Any idea what else I can try/modify?

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    • MangoPenguin@lemmy.blahaj.zone ⁨9⁩ ⁨months⁩ ago

      Does it show the root / filesystem inside the container?

      You may need to update the folder permissions on the Nextcloud volume to allow all users to read data.

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• 7Sea_Sailor@lemmy.dbzer0.com ⁨9⁩ ⁨months⁩ ago

  Why are you mounting the volume with the file system path, instead of the volume name? You should be able to mount the volume normally by specifying it in the volume section, i.e.

  services:
    duplicati:
      volumes:
        - nextcloud_data:ro
  
  volumes:
    - nextcloud_data
      - external: true
  

  That should grant Duplicati read-only access to the entire volume without messing around with absolute file paths.

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  • avnrt@lemmy.world ⁨9⁩ ⁨months⁩ ago

    Thanks, I didn’t fully understand the syntax before. I now see the volume in the duplicati GUI, but not its contents. When I just back up the entire volume, the backup size is basically zero (should be more like 800MB).

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