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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).

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How to move docker / podman container to another directory / drive? (lemmy.ml)

submitted 6 months ago* (last edited 6 months ago) by [email protected] to c/[email protected]

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I've got two internal SSDs, of which one is smaller (128) and one is bigger (1TB). How can I tell podman (or docker) to use another folder? Currently, it sits on the smaller drive which has less and less storage.

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[–] [email protected] 6 points 6 months ago* (last edited 6 months ago) (1 children)

For docker, you have to create /etc/docker/daemon.json and set:

{
  "data-root": "/docker"
}

You can move your /var/lib/docker while the daemon is stopped. I had no issues when I did the move.

~~I don't know how to change this for podman.~~

LE: https://ahelpme.com/software/podman/change-the-location-of-container-storage-in-podman-with-selinux-enabled/

[–] [email protected] 1 points 6 months ago

Thx, I'll check it out

[–] [email protected] 2 points 6 months ago* (last edited 6 months ago)

I would like to know this as well.

So far, it seems it's a bit easier to do with Podman / "standard OCI containers" because they're rootless and get stored in my home directory. But the solution I keep seeing is to move the directory and then symlink or mount bind the folder. I do the latter so that podman continues to work when that external drive isn't connected.

This does actually work, but I really don't like it. Why isn't there a way to store a container entirely in a specific location and then run straight from that location?

The alternative is to provide Podman a custom storage.conf for a specific location. But that too is a "permanent" change. I would love to know a cleaner solution to portable containers!