[arch-general] UID/GID of a systemd container

[Leonid Isaev]

On Thu, Dec 22, 2016 at 09:16:29AM +0000, arnaud gaboury via arch-general wrote:
>  % systemctl --version
> systemd 232
> +PAM -AUDIT -SELINUX -IMA -APPARMOR +SMACK -SYSVINIT +UTMP +LIBCRYPTSETUP
> +GCRYPT +GNUTLS +ACL +XZ +LZ4 +SECCOMP +BLKID +ELFUTILS +KMOD +IDN
> 
> % uname -r
> 4.8.13-1-hortensia (username space is set to YES)
> ------------------------------------------------
> 
> My setup: Archlinux host managing through systemd-nspawn a Fedora container
> on Btrfs.
> 
> I don't know what upgrade (kernel, Fedora 24 --> 25, systemd....) trigered
> this change, but UID/GID of my container are no more shown as before.
> 
> list container directory from host:
> 
>  # ls -al /var/lib/machines/poppy
> 
> dr-xr-xr-x 1 vu-poppy-0 vg-poppy-0   198 Dec 16 17:32 ./
> drwx------ 3 root       root        4.0K Dec 15 17:08 ../
> dr-xr-xr-x 1 vu-poppy-0 vg-poppy-0     0 Feb  3  2016 boot/
> drwxrwxr-x 1 vu-poppy-0 vg-poppy-0    62 Aug 26 19:59 db/
> drwxr-xr-x 1 vu-poppy-0 vg-poppy-0     8 Apr 27  2015 dev/
> drwxr-xr-x 1 vu-poppy-0 vg-poppy-0  4.2K Feb  3  2016 etc/
> drwxr-xr-x 1 vu-poppy-0 vg-poppy-0    86 Feb  3  2016 home/
> 
> Before it was like this:
> 
> # ls -al /var/lib/machines/poppy/
> 
> dr-xr-xr-x 1 363397120 363397120  198 Oct  4 15:54 ./
> drwx------ 3 root      root      4.0K Oct  1 15:53 ../
> dr-xr-xr-x 1 363397120 363397120    0 Feb  3  2016 boot/
> drwxrwxr-x 1 363397120 363397120   62 Aug 26 19:59 db/
> drwxr-xr-x 1 363397120 363397120    8 Apr 27  2015 dev/
> drwxr-xr-x 1 363397120 363397120 4.1K Feb  3  2016 etc/
> drwxr-xr-x 1 363397120 363397120   76 Feb  3  2016 home/
> 
> ------------------------------------------------------------
> 
> Thank you for any hint, link to documentation about this new way to show
> UID/GID of a container.

You are using user namespaces, yes?

-- 
Leonid Isaev