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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).

Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.

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Podman Issues (pawb.social)

submitted 9 months ago by pifox@pawb.social to c/linux@lemmy.ml

6 comments fedilink hide all child comments

I'm currently trying to run distrobox with podman. I'm getting the following error: Resolved "debian" as an alias (/etc/containers/registries.conf.d/shortnames.conf) Trying to pull docker.io/library/debian:12... Getting image source signatures Copying blob 1b13d4e1a46e done
ERRO[0003] While applying layer: ApplyLayer stdout: stderr: potentially insufficient UIDs or GIDs available in user namespace (requested 0:42 for /etc/gshadow): Check Copying blob 1b13d4e1a46e done
Error: copying system image from manifest list: writing blob: adding layer with blob "sha256:1b13d4e1a46e5e969702ec92b7c787c1b6891bff7c21ad378ff6dbc9e751d5d4": ApplyLayer stdout: stderr: potentially insufficient UIDs or GIDs available in user namespace (requested 0:42 for /etc/gshadow): Check /etc/subuid and /etc/subgid if configured locally and run podman-system-migrate: lchown /etc/gshadow: invalid argument exit status 1

Does anyone know what should be my next steps to resolve this issue?

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[–] just_another_person@lemmy.world 1 points 9 months ago

You skipped a step or two in your podman setup I think. Look up the rootless instructions, and make absolutely sure you have installed the right uid/gid packages for your distro.

[–] aberrate_junior_beatnik@midwest.social 0 points 9 months ago (1 children)

What's in /etc/subuid and /etc/subgid?

[–] pifox@pawb.social 0 points 9 months ago (1 children)

user@hostname:~$ ls /etc/subuid ls: cannot access '/etc/subuid': No such file or directory user@hostname:~$ ls /etc/subgid ls: cannot access '/etc/subgid': No such file or directory

[–] aberrate_junior_beatnik@midwest.social 1 points 9 months ago (1 children)

Well, that's your problem. sub?id is what defines which uids and gids are available to a user for purposes of making user namespaces. It's strange that those files don't already exist; useradd should create them automatically. What distro are you using?

Regardless, you can create those files yourself. Here's a line from subuid my machine: administrator:100000:65536. The first field is the username (you can also use a uid), the second is the starting uid for the block of uids, and the third field is the number of uids in that block. So uids from 100000-165535 (inclusive) are allocated to the user administrator.

See https://www.man7.org/linux/man-pages/man7/user_namespaces.7.html and https://man7.org/linux/man-pages/man5/subuid.5.html for more details.

[–] pifox@pawb.social 1 points 9 months ago (1 children)

This was my issue. I had to reboot my machine and now Podman is working properly.

[–] aberrate_junior_beatnik@midwest.social 2 points 9 months ago

Glad to hear it!