this post was submitted on 21 Jan 2024
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Podman Issues (pawb.social)
submitted 10 months ago by pifox@pawb.social to c/linux@lemmy.ml
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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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[–] aberrate_junior_beatnik@midwest.social 3 points 10 months ago (4 children)

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

[–] pifox@pawb.social 2 points 10 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 4 points 10 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 3 points 10 months ago (1 children)

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

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