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.
this post was submitted on 21 Jan 2024
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I installed podman using apt. It should come with the neccisary packages correct?
What's in /etc/subuid and /etc/subgid?
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
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.
This was my issue. I had to reboot my machine and now Podman is working properly.
Glad to hear it!