[Question]: Recreate container without dataloss

[rvbcrs]

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Question

I have a question, I started testing the container and uploaded data to it. When I change a parameter in the compose file and do a compose up, the container is recreated and all data is lost.
Is there a way to keep the data when the container is recreated?

[kroese]

Normally this should not happen. But maybe you have some setting enabled that automaticly removes volumes after stopping?

In any case you can use a normal directory instead of a volume:

volumes:
  - /var/dsm:/storage

That way you can see all the files and make sure they are not deleted after stopping.

[rvbcrs]

Normally this should not happen. But maybe you have some setting enabled that automaticly removes volumes after stopping?

In any case you can use a normal directory instead of a volume:

volumes:

• /var/dsm:/storage
  That way you can see all the files and make sure they are not deleted after stopping.

I did not change the path, this is what is in my compose up file:

services:
  dsm:
    container_name: dsm
    image: vdsm/virtual-dsm
    environment:
      DISK_SIZE: "2000G"
      DISK_FMT: "qcow2"
      RAM_SIZE: "32G"
      CPU_CORES: "10"
    devices:
      - /dev/kvm
      - /dev/net/tun
    cap_add:
      - NET_ADMIN
    ports:
      - 5000:5000
      - 5001:5001
    volumes:
      - /var/dsm:/storage
    restart: always
    stop_grace_period: 2m

So I was very confused that after I changed something and did a compose up, the container started as a fresh install I had to give a name to the device and set a username and password and everything was gone.
Could it be that I'm running the container on Unraid?

[kroese]

Yes it might have something to do with Unraid, I think the path /var/dsm is not a good location there.

There is a community app called virtual-dsm in the Unraid app store that has all the correct settings configured for this container, so it might be better to use it instead of a compose file.

[rvbcrs]

Great, I have installed that one! Somehow missed it :) Thanks for the quick response!