install_on_zfs.sh

#!/bin/bash

set -ex

if [ -z ${POOL_DISK} ]
then
  POOL_DISK="/dev/vda"
fi

if [ -z ${POOL_NAME} ]
then
  POOL_NAME="system"
fi

if [ -z ${HOST_NAME} ]
then
  HOST_NAME="zfshost"
fi

BOOT_PARTUUID=$(cat /proc/sys/kernel/random/uuid)
POOL_PARTUUID=$(cat /proc/sys/kernel/random/uuid)

sgdisk -Z ${POOL_DISK}
sgdisk -n 1:0:+1024M -t 1:ef00 -u 1:${BOOT_PARTUUID} ${POOL_DISK}
sgdisk -n 2:0:-8M  -t 2:bf01 -u 2:${POOL_PARTUUID} ${POOL_DISK}

sleep 1

BOOT_PART=$(readlink -f /dev/disk/by-partuuid/${BOOT_PARTUUID})
mkfs.vfat -n EFI -F32 ${BOOT_PART}

zpool create -f \
  -o ashift=12 \
  -O mountpoint=/ \
  -O canmount=off \
  -O compression=lz4 \
  -O atime=off \
  -O checksum=sha256 \
  -O utf8only=on \
  -O xattr=sa \
  -O acltype=posixacl \
  -R /run/${POOL_NAME} \
  ${POOL_NAME} \
  /dev/disk/by-partuuid/${POOL_PARTUUID}

sleep 1

zfs create -o mountpoint=none ${POOL_NAME}/rootfs
zfs create -o mountpoint=/ ${POOL_NAME}/rootfs/fedora28
zfs create -o setuid=off ${POOL_NAME}/home
zfs create -o mountpoint=/root ${POOL_NAME}/home/root
zfs create -o canmount=off -o setuid=off -o exec=off ${POOL_NAME}/var
zfs create -o com.sun:auto-snapshot=false ${POOL_NAME}/var/cache
zfs create -o canmount=off ${POOL_NAME}/var/lib
zfs create ${POOL_NAME}/var/lib/flatpak
zfs create ${POOL_NAME}/var/lib/docker
zfs create ${POOL_NAME}/var/lib/containers
zfs create ${POOL_NAME}/var/log
zfs create ${POOL_NAME}/var/spool
zfs create -o com.sun:auto-snapshot=false -o exec=on ${POOL_NAME}/var/tmp

mkdir -p /run/${POOL_NAME}/{boot,dev,etc,etc/rpm,proc,run,sys,tmp}

mount ${BOOT_PART} /run/${POOL_NAME}/boot
mount --bind /dev /run/${POOL_NAME}/dev
mount --bind /proc /run/${POOL_NAME}/proc
mount --bind /sys /run/${POOL_NAME}/sys
mount -t tmpfs tmpfs /run/${POOL_NAME}/run
mount -t tmpfs tmpfs /run/${POOL_NAME}/tmp

touch /run/${POOL_NAME}/etc/fstab
echo "PARTUUID=${BOOT_PARTUUID}   /boot   vfat    umask=0077,shortname=winnt,x-initrd.mount  0   2" > /run/${POOL_NAME}/etc/fstab

touch /run/${POOL_NAME}/etc/rpm/macros.image-language-conf
echo "%_install_langs C:en:en_US:en_US.UTF-8" > /run/${POOL_NAME}/etc/rpm/macros.image-language-conf

dnf -y --installroot=/run/${POOL_NAME} --nodocs --nogpg --releasever=28 \
  --disablerepo='*' --enablerepo=fedora --enablerepo=updates \
  install \
    bash-completion \
    binutils \
    cryptsetup \
    dbus-broker \
    dnf \
    dosfstools \
    dracut \
    fedora-release \
    gdisk \
    glibc-common \
    glibc-langpack-en \
    glibc-minimal-langpack \
    iproute \
    iputils \
    mbuffer \
    less \
    passwd \
    procps-ng \
    psmisc \
    rootfiles \
    rpm \
    selinux-policy-targeted \
    sudo \
    systemd \
    vim-minimal

echo "deltarpm=0" >> /run/${POOL_NAME}/etc/dnf/dnf.conf

chroot /run/${POOL_NAME} bootctl install --no-variables

chroot /run/${POOL_NAME} systemctl enable systemd-resolved systemd-networkd dbus-broker
chroot /run/${POOL_NAME} ln -s /run/systemd/resolve/resolv.conf /etc/resolv.conf
echo -e "[Match]\nName=en*\n\n[Network]\nDHCP=yes\n" > /run/${POOL_NAME}/etc/systemd/network/10-dhcp.network
if [ -n ${USB_STORAGE} ]
then
  echo "add_drivers+=usb-storage" > /run/${POOL_NAME}/etc/dracut.conf.d/usb.conf
fi
sed -i 's/root:\*:/root::/' /run/${POOL_NAME}/etc/shadow

curl -L -o /run/${POOL_NAME}/etc/yum.repos.d/fedora-zfs.repo http://repo.commandcentral.space/fedora-zfs/fedora-zfs.repo

sed -i '0,/metalink=/s/metalink=/baseurl=http:\/\/10\.171\.37\.120\/$releasever\/release\/\n#metalink=/' /run/${POOL_NAME}/etc/yum.repos.d/fedora.repo
sed -i '0,/metalink=/s/metalink=/baseurl=http:\/\/10\.171\.37\.120\/$releasever\/updates\/\n#metalink=/' /run/${POOL_NAME}/etc/yum.repos.d/fedora-updates.repo

dnf -y --installroot=/run/${POOL_NAME} --nodocs --nogpg --releasever=28 \
  install \
    kernel \
    kernel-core \
    kernel-modules \
    kernel-modules-extra

dnf -y --installroot=/run/${POOL_NAME} --nodocs --nogpg --releasever=28 \
  install zfs-dracut

chroot /run/${POOL_NAME} systemctl preset zfs-import-cache zfs-import-scan zfs-import.target zfs-mount zfs-share zfs-zed zfs.target

KERNEL_VERSION=$(chroot /run/${POOL_NAME} bash -c "rpm -q kernel|sed 's/kernel-//'")

zpool set cachefile=/run/${POOL_NAME}/etc/zfs/zpool.cache ${POOL_NAME}

echo ${HOST_NAME} > /run/${POOL_NAME}/etc/hostname

chroot /run/${POOL_NAME} dracut -fv --kver ${KERNEL_VERSION}

dnf -y --installroot=/run/${POOL_NAME} clean all

sync

chroot /run/system setfiles -v -F -e /boot -e /dev -e /proc -e /sys /etc/selinux/targeted/contexts/files/file_contexts /

chroot /run/system setfiles -v -F /etc/selinux/targeted/contexts/files/file_contexts /home
chroot /run/system setfiles -v -F /etc/selinux/targeted/contexts/files/file_contexts /root
chroot /run/system setfiles -v -F /etc/selinux/targeted/contexts/files/file_contexts /var/cache
chroot /run/system setfiles -v -F /etc/selinux/targeted/contexts/files/file_contexts /var/lib/flatpak
chroot /run/system setfiles -v -F /etc/selinux/targeted/contexts/files/file_contexts /var/lib/docker
chroot /run/system setfiles -v -F /etc/selinux/targeted/contexts/files/file_contexts /var/lib/containers
chroot /run/system setfiles -v -F /etc/selinux/targeted/contexts/files/file_contexts /var/log
chroot /run/system setfiles -v -F /etc/selinux/targeted/contexts/files/file_contexts /var/spool
chroot /run/system setfiles -v -F /etc/selinux/targeted/contexts/files/file_contexts /var/tmp

MACHINE_ID=$(cat /run/${POOL_NAME}/etc/machine-id)

cat << EOF > /run/${POOL_NAME}/boot/loader/entries/${MACHINE_ID}-${KERNEL_VERSION}.conf 
title	Fedora 28
version	${KERNEL_VERSION}
machine-id	${MACHINE_ID}
linux	/vmlinuz-${KERNEL_VERSION}
initrd	/initramfs-${KERNEL_VERSION}.img
options	root=ZFS=${POOL_NAME}/rootfs/fedora28 quiet
EOF

echo "timeout 3" > /run/${POOL_NAME}/boot/loader/loader.conf
echo "default ${MACHINE_ID}-*" >> /run/${POOL_NAME}/boot/loader/loader.conf

umount {/run/${POOL_NAME}/boot,/run/${POOL_NAME}/dev,/run/${POOL_NAME}/proc,/run/${POOL_NAME}/sys,/run/${POOL_NAME}/run,/run/${POOL_NAME}/tmp}

zfs snap -r ${POOL_NAME}@clean

zpool export ${POOL_NAME}