Hetzner/zfsinstall.sh

#!/bin/sh

DESTDISK="ada0"
DESTDIR="/mnt/zfs"
ZPOOL="zroot"

SCRIPTBASE=${PWD}

# check if the zpool already exists

ZPOOL_EXISTS=` zpool list -H | cut -f 1 | grep "${ZPOOL}"` 
if [ "${?}" -ne 1 ]; then
	echo "One zpool called ${ZPOOL} already exists, you have to destroy it first:"
	echo "	# zpool destroy ${ZPOOL}"
	exit 1
fi

# check if the disk is ok for writing

echo checking sanity ${DESTDISK} 
echo =============
gpart show ${DESTDISK}  1>/dev/null
if [ "${?}" -eq 0 ]; then

	gpart destroy -F ${DESTDISK}
	if [ "${?}" -ne 0 ]; then
		echo unable to reset ${DESTDISK}
		exit 1
	fi
fi

echo partitioning ${DESTDISK} 
echo =============

gpart create -s gpt ${DESTDISK}
gpart add -a 1m -t freebsd-boot -s 128k -l boot ${DESTDISK}
gpart add -a 1m -s 32G -t freebsd-swap -l swap ${DESTDISK}
gpart bootcode -b /boot/pmbr -p /boot/gptzfsboot -i 1 ${DESTDISK}
gpart add -a 1m -t freebsd-zfs -l syszfs ${DESTDISK}

gpart show ${DESTDISK}  1>/dev/null

sysctl vfs.zfs.min_auto_ashift=12

echo set up zfs pool: ${ZPOOL} alt mount: ${DESTDIR}
echo =================

zpool create  -m none -f -R ${DESTDIR} ${ZPOOL} ${DESTDISK}p3
if [ "${?}" -ne 0 ]; then
	echo "unable to create zpool"
	exit 1
fi


for I in ROOT VAR HOME; do
	zfs create -o mountpoint=none -o canmount=off  ${ZPOOL}/${I}
done

zfs create -o atime=off -o mountpoint=/ ${ZPOOL}/ROOT/master
zfs create -o mountpoint=/usr/obj ${ZPOOL}/ROOT/obj
zfs create -o compression=off -o mountpoint=/usr/src ${ZPOOL}/ROOT/src
# useless ? as far /tmp mountpoint will be mounted by tmpfs
zfs create -o mountpoint=/tmp ${ZPOOL}/ROOT/tmp

zfs create -o mountpoint=/usr/local ${ZPOOL}/LOCAL
zfs create -o mountpoint=/usr/local/etc ${ZPOOL}/LOCAL/config
zfs create -o copies=1 -o mountpoint=/usr/src -o compression=off ${ZPOOL}/src
zfs create -o copies=1 -o mountpoint=/usr/doc -o compression=on ${ZPOOL}/doc
zfs create -o copies=1 -o mountpoint=/usr/obj -o compression=on ${ZPOOL}/obj


zfs create -o mountpoint=/var ${ZPOOL}/VAR/master
zfs create -o mountpoint=/var/crash ${ZPOOL}/VAR/crash
zfs create -o exec=off -o setuid=off -o mountpoint=/var/db ${ZPOOL}/VAR/db
zfs create -o compression=lz4 -o exec=on -o setuid=off -o mountpoint=/var/db/pkg ${ZPOOL}/VAR/db/pkg
zfs create -o compression=on -o exec=off -o setuid=off -o mountpoint=/var/mail ${ZPOOL}/VAR/mail
zfs create -o compression=on -o exec=off -o setuid=off -o mountpoint=/var/log ${ZPOOL}/VAR/log
zfs create -o exec=off -o setuid=off -o mountpoint=/var/run ${ZPOOL}/VAR/run
zfs create -o exec=off -o setuid=off -o mountpoint=/var/tmp ${ZPOOL}/VAR/tmp

zfs create -o mountpoint=/usr/home ${ZPOOL}/HOME/master


chmod 1777 ${DESTDIR}/tmp ${DESTDIR}/var/tmp

zfs list -r ${ZPOOL}

cd ${DESTDIR}/tmp
if [ "${?}" -ne 0 ]; then
	echo zfs mountpoints arent ready
	exit 1
fi

echo Fetching and Extracting base files into ${DESTDIR}
echo =======================================


for I in base.txz kernel.txz lib32.txz; do
	fetch http://ftp.freebsd.org/pub/FreeBSD/snapshots/amd64/12.0-ALPHA8/${I}
	tar --unlink -pJxf ${I} -C ${DESTDIR}
done

echo writing configuration files
echo ==========================

cat << EOF >> ${DESTDIR}/etc/fstab
/dev/${DESTDISK}p2 none        swap    sw  0   0
tmpfs	/tmp	tmpfs	rw,mode=1777	0	0
EOF

cat << EOF >> ${DESTDIR}/boot/loader.conf
zfs_load=YES
tmpfs_load=YES
EOF

cat << EOF >> ${DESTDIR}/boot/loader.conf.local
vfs.root.mountfrom="zfs:${ZPOOL}/ROOT/master"
EOF

cat << EOF >> ${DESTDIR}/etc/rc.conf
sshd_enable="YES"
sendmail_enable="NONE"
kld_list="vmm cuse4bsd cpuctl filemon"
ntpd_enable="YES"
# Set dumpdev to "AUTO" to enable crash dumps, "NO" to disable
dumpdev="AUTO"
zfs_enable="YES"
EOF

cd ${SCRIPTBASE}
for I in resolv.conf rc.conf.local; do
	if [ -r "${I}" ]; then
		echo installing ${I}
		install -o root -g wheel -m 0644  ${I} ${DESTDIR}/etc/
	fi
done

for I in loader.conf.local; do
	if [ -r "${I}" ]; then
		echo installing ${I}
		install -o root -g wheel -m 0644 ${I} ${DESTDIR}/boot/
	fi
done

echo installing rc.conf.d
install -o root -g wheel -d -m 0755 ${DESTDIR}/etc/rc.conf.d 
if [ -d "./rc.conf.d" ]; then 
	echo installing files into rc.conf.d
	install -o root -g wheel -m 0644 ./rc.conf.d/* ${DESTDIR}/etc/rc.conf.d/
fi

chroot ${DESTDIR} passwd
chroot ${DESTDIR} adduser

read -p "Do you wish to open a shell ?" yn
case $yn in
	[Nn]* ) exit 0;;
	[Yy]* ) ;;
	* ) echo "Please answer yes or no.";;
esac
chroot ${DESTDIR} tcsh
exit 0