#3 How to configure aufs3 mounting in fstab for Gentoo?

[Koichi Senada]

I have a complicated mounting scheme for Gentoo Linux network booted clients.
It is made of a sysinit runlevel mounting script which runs first and /etc/fstab file which runs after.

I have the details at http://forums.gentoo.org/viewtopic-t-929586.html
But briefly I wish to combine to put it all into the /etc/fstab file to get rid of the script.
Whether is that possible?

Lines of /etc/fstab file.
none / none ro 0 0
none /mnt tmpfs nodev,nosuid 0 0
none /media tmpfs nodev,nosuid 0 0
proc /proc proc defaults 0 0
shm /dev/shm tmpfs nodev,nosuid,noexec 0 0
192.168.1.1:/netboot/gentoo3 / nfs ro,intr,rsize=8192,wsize=8192 0 0
tmpfs /tmp tmpfs defaults,nosuid,noatime 0 0
tmpfs /run tmpfs defaults,nosuid,noatime 0 0
192.168.1.1:/var/www /var/www nfs rw,nolock 0 0
/dev/disk/by-label/home /home ext3 rw,nodiratime,noatime 0 0

Lines of the sysinit runlevel mounting script file.
#!/sbin/runscript
description="Configure system for netboot"
depend()
{
before udev
}

start() {
einfo "netboot-mount start"
mount -l
mount -nt tmpfs -o rw none /ramdisk && einfo "mount tmpfs ramdisk" || eerror "mount tmpfs ramdisk failed"
for i in etc var root; do
mkdir /ramdisk/$i
mount -nt aufs -o dirs=/ramdisk/$i=rw:/$i=rr aufs /$i
done
}

How would you configure it with just /etc/fstab file if that is possible?