ubuntu-20.04: Installation script.
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Ole Tange
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236
ubuntu-20.04/install-zfs-luks.sh
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236
ubuntu-20.04/install-zfs-luks.sh
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#!/bin/bash
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# Boot Live CD
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# Start terminal
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# sudo su -
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# apt update
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# apt install openssh-server
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# passwd ubuntu
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password=${password:-MyLUKSPassword}
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hostname=${hostname:-myhostname}
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DISK=${DISK:-/dev/disk/by-id/ata-ST1000LM024_HN-M101MBB_S2R8JX0D400082}
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export password
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export DISK
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install_build_software() {
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apt-add-repository universe
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apt update
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apt install --yes debootstrap gdisk zfs-initramfs cryptsetup-bin
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}
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partitiondisk() {
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sgdisk --zap-all $DISK
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sgdisk -n2:1M:+512M -t2:EF00 $DISK
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sgdisk -a 4096 -n3:0:+2G -t3:BF01 $DISK
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# TODO better way to find the max size rounded to 8192
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sgdisk -a 4096 -n4:0:1953521663 -t4:8300 $DISK
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fdisk -l $DISK
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# Needed for partitiontable to be visible
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sleep 5
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}
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setup_zpool_for_boot() {
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zpool create -f -o ashift=12 -d \
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-o feature@async_destroy=enabled \
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-o feature@bookmarks=enabled \
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-o feature@embedded_data=enabled \
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-o feature@empty_bpobj=enabled \
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-o feature@enabled_txg=enabled \
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-o feature@extensible_dataset=enabled \
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-o feature@filesystem_limits=enabled \
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-o feature@hole_birth=enabled \
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-o feature@large_blocks=enabled \
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-o feature@lz4_compress=enabled \
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-o feature@spacemap_histogram=enabled \
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-o feature@userobj_accounting=enabled \
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-o overlay=on \
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-O acltype=posixacl -O canmount=off -O compression=lz4 -O devices=off \
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-O normalization=formD -O relatime=on -O xattr=sa \
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-O mountpoint=/ -R /mnt bpool ${DISK}-part3
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}
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setup_zpool_for_root() {
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cryptsetup luksClose luks1
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echo "$password" | cryptsetup -y -v luksFormat --sector-size 4096 \
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--pbkdf-memory 4000000 --pbkdf argon2id --iter-time 3000 \
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${DISK}-part4
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echo "$password" | cryptsetup luksOpen ${DISK}-part4 luks1
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zpool create -o ashift=12 \
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-O acltype=posixacl -O canmount=off -O compression=lz4 \
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-O dnodesize=auto -O normalization=formD -O relatime=on -O xattr=sa \
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-O mountpoint=/ -R /mnt rpool /dev/mapper/luks1
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}
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create_zfs_mounts() {
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zfs create -o canmount=off -o mountpoint=none rpool/ROOT
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zfs create -o canmount=off -o mountpoint=none bpool/BOOT
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zfs create -o canmount=noauto -o mountpoint=/ rpool/ROOT/ubuntu
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zfs mount rpool/ROOT/ubuntu
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zfs create -o canmount=noauto -o mountpoint=/boot bpool/BOOT/ubuntu
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zfs mount bpool/BOOT/ubuntu
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}
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bootstrap_debian() {
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debootstrap focal /mnt
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# Do not allow device files in rpool (why?)
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zfs set devices=off rpool
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}
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make_stage2() {
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cat <<_stage2_eof >/mnt/stage2.sh
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set_hostname() {
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echo $hostname > etc/hostname
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echo 127.0.1.1 $hostname >> etc/hosts
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}
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add_apt_sources() {
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perl -pe 's/\s*$/\n/' <<EOF > etc/apt/sources.list
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deb http://archive.ubuntu.com/ubuntu focal main universe
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deb-src http://archive.ubuntu.com/ubuntu focal main universe
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deb http://security.ubuntu.com/ubuntu focal-security main universe
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deb-src http://security.ubuntu.com/ubuntu focal-security main universe
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deb http://archive.ubuntu.com/ubuntu focal-updates main universe
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deb-src http://archive.ubuntu.com/ubuntu focal-updates main universe
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EOF
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ln -s /proc/self/mounts /etc/mtab
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apt update
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locale-gen --purge "en_US.UTF-8"
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update-locale LANG=en_US.UTF-8 LANGUAGE=en_US
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dpkg-reconfigure --frontend noninteractive locales
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#dpkg-reconfigure tzdata
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}
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install_initrd_tools() {
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apt install --yes nano
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apt install linux-modules-5.4.0-26-generic
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apt install --yes --no-install-recommends linux-image-generic
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apt install --yes zfs-initramfs
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apt install --yes grub-efi-amd64
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}
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install_luks() {
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apt install --yes cryptsetup
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# Add LUKS device for root in /etc/crypttab
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echo luks1 UUID=$(blkid -s UUID -o value ${DISK}-part4) none \
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luks,discard,initramfs > /etc/crypttab
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}
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install_efi() {
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umount /boot/efi
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apt install dosfstools
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mkdosfs -F 32 -s 1 -n EFI ${DISK}-part2
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mkdir -p /boot/efi
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echo PARTUUID=$(blkid -s PARTUUID -o value ${DISK}-part2) \
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/boot/efi vfat nofail,x-systemd.device-timeout=1 0 1 >> /etc/fstab
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mount /boot/efi
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apt install --yes grub-efi-amd64-signed shim-signed
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}
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install_zfs_systemd_service() {
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perl -pe 's/\s*$/\n/' <<EOF > /etc/systemd/system/zfs-import-bpool.service
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[Unit]
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DefaultDependencies=no
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Before=zfs-import-scan.service
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Before=zfs-import-cache.service
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[Service]
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Type=oneshot
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RemainAfterExit=yes
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ExecStart=/sbin/zpool import -N -o cachefile=none bpool
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[Install]
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WantedBy=zfs-import.target
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EOF
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systemctl enable zfs-import-bpool.service
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}
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adduser_group() {
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addgroup --system lpadmin
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addgroup --system sambashare
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echo "root:$password" | chpasswd
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}
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install_grub() {
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grub-probe /boot
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echo "### These are OK:"
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echo " cryptsetup: ERROR: Couldn't resolve device rpool/ROOT/ubuntu"
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echo " cryptsetup: WARNING: Couldn't determine root device"
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update-initramfs -c -k all
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(
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echo GRUB_TERMINAL=console
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echo GRUB_TIMEOUT=5
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echo 'GRUB_CMDLINE_LINUX="root=ZFS=rpool/ROOT/ubuntu"'
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echo GRUB_TIMEOUT_STYLE=''
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echo 'GRUB_CMDLINE_LINUX_DEFAULT=""'
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echo GRUB_TIMEOUT=5
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) >>/etc/default/grub
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update-grub
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grub-install --target=x86_64-efi --efi-directory=/boot/efi \
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--bootloader-id=ubuntu --recheck --no-floppy
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}
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ready_for_first_boot() {
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zpool export bpool
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zpool export rpool
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echo "Now reboot"
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echo "You may have to do this on first boot"
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echo " zpool import -f bpool"
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echo " zpool import -f rpool"
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}
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stage2() {
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set_hostname
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add_apt_sources
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install_initrd_tools
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install_luks
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install_efi
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install_zfs_systemd_service
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adduser_group
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install_grub
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ready_for_first_boot
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}
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stage2
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_stage2_eof
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}
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stage1() {
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install_build_software
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partitiondisk
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setup_zpool_for_boot
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setup_zpool_for_root
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create_zfs_mounts
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bootstrap_debian
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make_stage2
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}
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doall() {
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stage1
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mount --rbind /dev /mnt/dev
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mount --rbind /proc /mnt/proc
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mount --rbind /sys /mnt/sys
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chroot /mnt /usr/bin/env DISK=$DISK bash -x /stage2.sh
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umount /mnt/boot || umount -l /mnt/boot
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zpool export bpool || zpool export -f bpool
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umount /mnt || umount -l /mnt
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zpool export rpool || zpool export -f rpool
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}
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