[lxc-users] Nested user namespace container fails to start

[Serge Hallyn]

Quoting Cam Cope (cam at dropbox.com):
> The main error appears to be that /proc fails to mount (I bolded it below).
> Is there any way I can debug this further?

My guess is that you do not have

lxc.include = /usr/share/lxc/config/nesting.conf

in the (arent) container configuration.  Without that the kernel will see
/proc and /sys as being overmounted and refuse to allow unpriv users to mount
them.