Comment 26 for bug 1602192

I don't know that much about /proc/sys/fs/inotify/max_user_instances, but apparently this isn't properly namespaced, so it is a global limit for all containers on the host? As a workaround, lxd could ship a /usr/lib/sysctl.d/ snippet to bump it, but I'm not sure if that has other downsides (particularly as we install lxd by default).