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Create zfs_bootstrap_be.sh
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John-Paul Bader
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177
zfs_bootstrap_be.sh
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zfs_bootstrap_be.sh
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#!/bin/sh
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# Check:
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# https://wiki.freebsd.org/RootOnZFS/GPTZFSBoot/9.0-RELEASE
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# http://wp.strahlert.net/wordpress/zfs-2/expanding-zpool/
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# This script will add ZFS Boot-Enironment support
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# Tested on FreeBSD 10, 11 and 12
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###############################################################
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# WARNING: Go through line by line and adjust where necessary #
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###############################################################
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# Create Partition Table
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echo "Create Partition Table"
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gpart create -s gpt ada0 # Main HDD
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gpart create -s gpt ada1 # Main HDD
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# Optional if you have SSDs for ZIL and L2ARC
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# gpart create -s gpt ada2 # ZIL and L2ARC SSD
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# gpart create -s gpt ada3 # ZIL and L2ARC SSD
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# Create Boot Partition
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echo "Create Boot Partition"
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gpart add -a 4k -s 512k -t freebsd-boot ada0
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gpart add -a 4k -s 512k -t freebsd-boot ada1
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# Create Swap Partitions
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echo "Create Swap Partitions"
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gpart add -a 4k -s 8G -t freebsd-swap -l swap0 ada0
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gpart add -a 4k -s 8G -t freebsd-swap -l swap1 ada1
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# Create Main Partitions
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echo "Create Main Partitions"
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gpart add -a 4k -t freebsd-zfs -l disk0 ada0
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gpart add -a 4k -t freebsd-zfs -l disk1 ada1
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# Write Bootcode
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echo "Write Bootcode"
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gpart bootcode -b /boot/pmbr -p /boot/gptzfsboot -i 1 ada0
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gpart bootcode -b /boot/pmbr -p /boot/gptzfsboot -i 1 ada1
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# Create ZIL Partions
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# echo "Create ZIL Partions"
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# gpart add -a 4k -b 2048 -s 10G -t freebsd-zfs -l zil0 ada2
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# gpart add -a 4k -b 2048 -s 10G -t freebsd-zfs -l zil1 ada3
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# Create L2ARC Partitions
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# echo "Create L2ARC Partitions"
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# gpart add -a 4k -t freebsd-zfs -l l2arc0 ada2
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# gpart add -a 4k -t freebsd-zfs -l l2arc1 ada3
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# Load ZFS extensions
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kldload opensolaris.ko
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kldload zfs.ko
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# Force ZFS to use 4k sectors
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sysctl vfs.zfs.min_auto_ashift=12
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# Create ZFS Pool
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echo "Create ZFS Pool"
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zpool create -o altroot=/mnt -o cachefile=/var/tmp/zpool.cache -f tank mirror /dev/gpt/disk0 /dev/gpt/disk1
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# Enable Compression
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echo "Enabling Compression"
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zfs set compression=lz4 tank
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# Add ZIL and L2ARC
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# echo "Add ZIL and L2ARC"
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# zpool add tank log mirror /dev/gpt/zil0 /dev/gpt/zil1
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# zpool add tank cache /dev/gpt/l2arc0 /dev/gpt/l2arc1
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# Create a very minimal ZFS Boot Environment Layout
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# https://wiki.freebsd.org/BootEnvironments
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echo "Creating zfs boot-environment layout"
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zfs create -o mountpoint=none tank/ROOT
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zfs create -o mountpoint=/ tank/ROOT/default
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# Set BOOTFS
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echo "Set BOOTFS"
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zpool set bootfs=tank/ROOT/default tank
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zfs set cachefile=/mnt/var/tmp/zpool.cache
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# Copy FreeBSD files
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echo "Installing FreeBSD"
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cd /usr/freebsd-dist
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export DESTDIR=/mnt
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for f in base.txz lib32.txz kernel.txz doc.txz ports.txz src.txz;do
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(cat $f | tar --unlink -xvpJf - -C ${DESTDIR:-/});
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done
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echo "Enter hostname FQDN"
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read HOSTNAME
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echo "Enter last public IP octet"
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read IP_ENDING
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echo "Enter username"
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read USERNAME
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cat > /mnt/etc/rc.conf << RCCONF
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hostname="$HOSTNAME"
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zfs_enable="YES"
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# Network
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defaultrouter="0.0.0.0"
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ifconfig_igb0="inet 0.0.0.$IP_ENDING/32"
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# Services
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sendmail_enable="NONE"
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sshd_enable="YES"
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RCCONF
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cat > /mnt/etc/fstab << FSTAB
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# Device Mountpoint FStype Options Dump Pass#
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/dev/gpt/swap0 none swap sw 0 0
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/dev/gpt/swap1 none swap sw 0 0
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FSTAB
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cat >> /mnt/boot/loader.conf << LOADER
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opensolaris_load="YES"
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zfs_load="YES"
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vfs.zfs.arc_max="8G"
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LOADER
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cat >> /mnt/etc/sysctl.conf << SYSCTL
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vfs.zfs.min_auto_ashift=12
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SYSCTL
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cat > /mnt/etc/resolv.conf << RESOLV
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nameserver 0.0.0.0
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nameserver 0.0.0.0
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RESOLV
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# Mount a devfs to have /dev/random /dev/zero etc in our chroot
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mount -t devfs none /mnt/dev
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# Bootstap pkg and install minimal packages for ansible
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chroot -u root -g wheel /mnt/ env ASSUME_ALWAYS_YES=YES pkg bootstrap
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chroot -u root -g wheel /mnt/ env ASSUME_ALWAYS_YES=YES pkg install sudo zsh
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# Add user
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chroot -u root -g wheel /mnt/ pw useradd -n $USERNAME -u 1001 -s /usr/local/bin/zsh -m -d /home/$USERNAME -G wheel -h 0
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# Fetch user pub key from github
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mkdir -p /mnt/home/$USERNAME/.ssh
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# This fetches the pub key from the sepcified github users and adds them
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# to the .authorized_keys of the new system user
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echo "List of Github users for pubkey retrieval (space separated):"
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read users
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for user in $users; do
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fetch https://github.com/$user.keys --no-verify-peer -o - >> /mnt/home/deploy/.ssh/authorized_keys
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done
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chown -R 1001:1001 /mnt/home/$USERNAME/.ssh
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# Unmount tank and re-set mountpoint
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zfs unmount -f tank
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zfs set mountpoint=/ tank
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echo "Done"
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