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Moving docker image data between VMs (lemmy.ml)

submitted 1 month ago by trilobite@lemmy.ml to c/selfhost@lemmy.ml

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I have 2 servers both running a Debian VM each. The old VM was one of the first o installed several years ago when I knew lityle and its messed up and has little space left. It running on Truenas Scale and has a couple of docker apps that I'm very dependent on (Firefly, Hammond). I want to move the datasets for these docker apps to a newer VM running on Proxmox server. It a Debian 13 VM with loads of space. What are my options for moving the data given neither Firefly nor Hammond have the appropriate export / import functions? I could migrate the old VM that that wouldn't resolve my space issue. Plus it Debian 10 and it would take a lot to being it up to Trixie.

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[–] db_geek@norden.social 3 points 1 month ago

@thirdBreakfast @trilobite 🤔
Interestingly, handling of volumes with podman is much more easier:
podman volume export myvol --output myvol.tar
podman volume import myvol myvol.tar
https://docs.podman.io/en/latest/markdown/podman-volume-export.1.html

I also checked the docker volume client documentation and there is no export command available like for podman.
https://docs.docker.com/reference/cli/docker/volume/