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From: Eir Nym <eirnym@gmail.com>
Date: Fri, 20 Sep 2013 21:25:57 +0400
Message-ID: <CAO8GK0pqGSE+0X4r3yt=ELb9uLxLNMGhNpV3h6APwbzq8UANmg@mail.gmail.com>
Subject: rc.conf reloading while /etc/ is one of mounted fs
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I had problem with /etc/rc.conf and /etc/rc.conf.local won't be
reloaded if /etc/ mounted on boot. There's way to detect it more correctly
than I does?

I have following ZFS mounts:

server/common/distfiles         /usr/ports/distfiles
server/common/home              /usr/home
server/common/local.etc         /usr/local/etc
server/common/obj               /usr/obj
server/common/tmp               /tmp
server/common/var               /var
server/common/www               /usr/local/www
server/os/r255342               /
server/os/r255342/boot          /boot
server/os/r255342/etc           /etc
server/os/r255342/local         /usr/local
server/os/r255342/ports         /usr/ports
server/os/r255342/src           /usr/src

the reason I split root partition is ability to make it read-only

So the only way to load correct /etc/rc.conf and /etc/rc.local is replace
/etc/rc on root partition with following contents:

#!/bin/sh
/sbin/zfs mount `zfs list|awk ' $5=="/etc" {print $1}' `
exec /etc/rc $@

-- Eir Nym