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

[arnaud gaboury]

 % 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)
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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/

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Thank you for any hint, link to documentation about this new way to show
UID/GID of a container.