Quick repro steps:
❯ lxc launch ubuntu-daily:noble shadow Creating shadow Starting shadow ❯ lxc exec shadow bash root@shadow:~# mv /etc /etc_write root@shadow:~# mkdir /etc root@shadow:~# mount -o bind,ro /etc_write /etc root@shadow:~# useradd --extrausers --groups somegroup somenewuser useradd: cannot lock /etc/group; try again later.
Quick repro steps:
❯ lxc launch ubuntu-daily:noble shadow
Creating shadow
Starting shadow
❯ lxc exec shadow bash
root@shadow:~# mv /etc /etc_write
root@shadow:~# mkdir /etc
root@shadow:~# mount -o bind,ro /etc_write /etc
root@shadow:~# useradd --extrausers --groups somegroup somenewuser
useradd: cannot lock /etc/group; try again later.