Installing FreeBSD 9 Root on ZFS with less fuss

WIP! DO NOT USE UNLESS YOU KNOW WHAT YOU ARE DOING.

Based the 9.0-REL page.

Creating a bootable ZFS filesystem

export DISK=mfid0
/etc/rc.d/tmp start
dd if=/dev/zero of=/dev/$DISK bs=1m count=10
gpart create -s gpt $DISK
gpart add -b 34 -s 256 -t freebsd-boot $DISK
gpart add -b 512 -s 32G -t freebsd-swap -l sys-swap0 $DISK
gpart add -t freebsd-zfs -l sys-zfs0 $DISK
gpart bootcode -b /boot/pmbr -p /boot/gptzfsboot -i 1 $DISK

kldload zfs

Create the zfs pool.

Replace mirror as needed, and add all disks that should be part of the pool.

 zpool create -o altroot=/mnt zroot /dev/gpt/sys-zfs0

Installing FreeBSD to the ZFS file system

Create ZFS filesystem hierarchy

ZFS apparently requires zroot/usr if I want zroot/usr/local

zfs create                      -o setuid=off   zroot/tmp
zfs create                                      zroot/usr
zfs create                                      zroot/usr/local
zfs create                      -o setuid=off   zroot/home
zfs create -o compression=lzjb  -o setuid=off   zroot/usr/ports
zfs create -o compression=off   -o setuid=off   zroot/usr/ports/distfiles
zfs create -o compression=lzjb  -o setuid=off   zroot/usr/src
zfs create                                      zroot/usr/obj
zfs create                      zroot/var
zfs create                      zroot/var/log
zfs create -o setuid=off        zroot/var/tmp
chmod 1777 /mnt/var/tmp /mnt/tmp

export DIST=/usr/freebsd-dist
tar -C /mnt -xf ${DIST}/base.txz
tar -C /mnt -xf ${DIST}/games.txz 
tar -C /mnt -xf ${DIST}/kernel.txz 
tar -C /mnt -xf ${DIST}/lib32.txz 

tar -C /mnt -xf ${DIST}/src.txz

Finishing touches

Fix zpool cachefile, to be able to boot from the new pool. Enable ZFS in the startup configuration to mount zfs filesystems on startup.

echo 'zfs_enable="YES"' >> /mnt/etc/rc.conf
echo 'zfs_load="YES"' >> /mnt/boot/loader.conf
echo 'vfs.root.mountfrom="zfs:zroot"' >> /mnt/boot/loader.conf
mkdir /mnt/etc
cat << EOF > /mnt/etc/fstab
# Device                Mountpoint      FStype  Options Dump    Pass#
/dev/gpt/sys-swap0      none            swap    sw      0       0
EOF

echo -h > /mnt/boot.config
echo 'console="comconsole"' >> /mnt/boot/loader.conf
echo 'beastie_disable="YES"' >> /mnt/boot/loader.conf 
sed -i "" -e '/tty[du]0/s/off/on/' -e '/tty[du]0/s/dialup/vt100/' /mnt/etc/ttys

echo 'comconsole_speed="115200"' >> /mnt/boot/loader.conf

zfs unmount -a
zpool export zroot
zpool import -o cachefile=/tmp/zpool.cache -o altroot=/mnt zroot

Set mountpoints

zfs set mountpoint=/ zroot
cp /tmp/zpool.cache /mnt/boot/zfs/
zfs unmount -a
zpool set bootfs=zroot zroot
zpool set cachefile='' zroot
zfs set mountpoint=legacy zroot
zfs set mountpoint=/tmp zroot/tmp
zfs set mountpoint=/usr zroot/usr
zfs set mountpoint=/var zroot/var
zfs set mountpoint=/home zroot/home

UFS

gpart add -s 2G -t freebsd-ufs -l sys-root0 $DISK
gpart add -s 2G -t freebsd-ufs -l sys-root1 $DISK
gpart add -s 15G -t freebsd-ufs -l sys-var $DISK
gpart add -s 15G -t freebsd-ufs -l sys-usr $DISK
gpart add  -t freebsd-ufs -l sys-local0 $DISK
gpart bootcode -b /boot/pmbr -p /boot/gptboot -i 1 $DISK

newfs /dev/gpt/sys-root0
newfs -U /dev/gpt/sys-var
newfs -U /dev/gpt/sys-usr
newfs -U /dev/gpt/sys-local0

mount /dev/gpt/sys-root0 /mnt
mkdir /mnt/usr /mnt/var /mnt/local0
mount /dev/gpt/sys-var /mnt/var
mount /dev/gpt/sys-usr /mnt/usr
mount /dev/gpt/sys-local0 /mnt/local0/