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Update Alpine, Arch, Fedora and RHEL root on ZFS guides

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Signed-off-by: Maurice Zhou <jasper@apvc.uk>
This commit is contained in:
Maurice Zhou
2023-03-07 20:24:36 +01:00
committed by George Melikov
parent a0c149af5b
commit a69befb2ce
16 changed files with 628 additions and 391 deletions
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37
docs/Getting Started/RHEL-based distro/RHEL-based distro Root on ZFS/1-preparation.rst
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@@ -8,7 +8,8 @@ Preparation
#. Disable Secure Boot. ZFS modules can not be loaded if Secure Boot is enabled.
#. Download a variant of `AlmaLinux Minimal Live ISO
<https://repo.almalinux.org/almalinux/9/live/x86_64/>`__ and boot from it.
<https://repo.almalinux.org/almalinux/9.1/live/x86_64/>`__
and boot from it.
#. Connect to the Internet.
#. Set root password or ``/root/.ssh/authorized_keys``.
#. Start SSH server::
@@ -24,9 +25,9 @@ Preparation
List available disks with::
ls /dev/disk/by-id/*
find /dev/disk/by-id/
If using virtio as disk bus, use ``/dev/disk/by-path/*``.
If using virtio as disk bus, use ``/dev/disk/by-path/``.
Declare disk array::
@@ -38,11 +39,10 @@ Preparation
#. Set partition size:
Set swap size. It's `recommended <https://chrisdown.name/2018/01/02/in-defence-of-swap.html>`__
to setup a swap partition. If you intend to use hibernation,
the minimum should be no less than RAM size. Skip if swap is not needed::
Set swap size, set to 1 if you don't want swap to
take up too much space::
INST_PARTSIZE_SWAP=8
INST_PARTSIZE_SWAP=4
Root pool size, use all remaining disk space if not set::
@@ -54,24 +54,21 @@ Preparation
SELinux will be enabled on the installed system.
#. Add ZFS repo::
#. Add ZFS repo and install ZFS inside live system::
dnf install -y https://zfsonlinux.org/epel/zfs-release-2-2$(rpm --eval "%{dist}").noarch.rpm
#. Check available repos::
dnf repolist --all
#. Install ZFS packages::
rpm -e --nodeps zfs-fuse || true
source /etc/os-release
export VERSION_ID
dnf config-manager --disable zfs
dnf config-manager --enable zfs-kmod
dnf install -y zfs
#. Load kernel modules::
modprobe zfs
#. Install partition tool::
#. Install partition tool and arch-install-scripts::
dnf install -y gdisk dosfstools
dnf install -y epel-release
dnf install -y gdisk dosfstools arch-install-scripts
dnf download arch-install-scripts
rpm -i --nodeps arch-install-scripts*.rpm
dnf remove -y epel-release

54
docs/Getting Started/RHEL-based distro/RHEL-based distro Root on ZFS/2-system-installation.rst
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@@ -10,13 +10,18 @@ System Installation
for i in ${DISK}; do
# wipe flash-based storage device to improve
# performance.
# ALL DATA WILL BE LOST
# blkdiscard -f $i
sgdisk --zap-all $i
sgdisk -n1:1M:+1G -t1:EF00 $i
sgdisk -n2:0:+4G -t2:BE00 $i
test -z $INST_PARTSIZE_SWAP || sgdisk -n4:0:+${INST_PARTSIZE_SWAP}G -t4:8200 $i
sgdisk -n4:0:+${INST_PARTSIZE_SWAP}G -t4:8200 $i
if test -z $INST_PARTSIZE_RPOOL; then
sgdisk -n3:0:0 -t3:BF00 $i
@@ -25,6 +30,12 @@ System Installation
fi
sgdisk -a1 -n5:24K:+1000K -t5:EF02 $i
sync && udevadm settle && sleep 3
cryptsetup open --type plain --key-file /dev/random $i-part4 ${i##*/}-part4
mkswap /dev/mapper/${i##*/}-part4
swapon /dev/mapper/${i##*/}-part4
done
#. Create boot pool::
@@ -84,16 +95,14 @@ System Installation
If not using a multi-disk setup, remove ``mirror``.
#. This section implements dataset layout as described in `overview <1-preparation.html>`__.
Create root system container:
#. Create root system container:
- Unencrypted::
zfs create \
-o canmount=off \
-o mountpoint=none \
rpool/redhat
rpool/alma
- Encrypted:
@@ -106,20 +115,35 @@ System Installation
-o encryption=on \
-o keylocation=prompt \
-o keyformat=passphrase \
rpool/redhat
rpool/alma
Create system datasets::
You can automate this step (insecure) with: ``echo POOLPASS | zfs create ...``.
zfs create -o canmount=on -o mountpoint=/ rpool/redhat/root
zfs create -o canmount=on -o mountpoint=/home rpool/redhat/home
zfs create -o canmount=off -o mountpoint=/var rpool/redhat/var
zfs create -o canmount=on rpool/redhat/var/lib
zfs create -o canmount=on rpool/redhat/var/log
Create system datasets, let Alma declaratively
manage mountpoints with ``mountpoint=legacy``::
Create boot dataset::
zfs create -o mountpoint=legacy rpool/alma/root
mount -t zfs rpool/alma/root /mnt/
zfs create -o mountpoint=legacy rpool/alma/home
mkdir /mnt/home
mount -t zfs -o zfsutil rpool/alma/home /mnt/home
zfs create -o mountpoint=legacy rpool/alma/var
zfs create -o mountpoint=legacy rpool/alma/var/lib
zfs create -o mountpoint=legacy rpool/alma/var/log
zfs create -o mountpoint=none bpool/alma
zfs create -o mountpoint=legacy bpool/alma/root
mkdir /mnt/boot
mount -t zfs bpool/alma/root /mnt/boot
zfs create -o canmount=off -o mountpoint=none bpool/redhat
zfs create -o canmount=on -o mountpoint=/boot bpool/redhat/root
#. zfs-dracut requires root dataset to have a mountpoint
other than legacy::
umount -Rl /mnt
zfs set canmount=noauto rpool/alma/root
zfs set mountpoint=/ rpool/alma/root
mount -t zfs rpool/alma/root /mnt
mount -t zfs rpool/alma/home /mnt/home
mount -t zfs bpool/alma/root /mnt/boot
#. Format and mount ESP::

68
docs/Getting Started/RHEL-based distro/RHEL-based distro Root on ZFS/3-system-configuration.rst
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@@ -8,28 +8,39 @@ System Configuration
#. Generate fstab::
mkdir -p /mnt/var/log
mkdir -p /mnt/var/lib
mount -t zfs rpool/alma/var/lib /mnt/var/lib
mount -t zfs rpool/alma/var/log /mnt/var/log
mkdir -p /mnt/etc/
for i in ${DISK}; do
echo UUID=$(blkid -s UUID -o value ${i}-part1) /boot/efis/${i##*/}-part1 vfat \
umask=0022,fmask=0022,dmask=0022 0 1 >> /mnt/etc/fstab
done
echo $(echo $DISK | cut -f1 -d\ )-part1 /boot/efi vfat \
noauto,umask=0022,fmask=0022,dmask=0022 0 1 >> /mnt/etc/fstab
genfstab -t PARTUUID /mnt | grep -v swap > /mnt/etc/fstab
sed -i "s|vfat.*rw|vfat rw,x-systemd.idle-timeout=1min,x-systemd.automount,noauto,nofail|" /mnt/etc/fstab
#. Install basic system packages::
dnf --installroot=/mnt \
--releasever=$VERSION_ID -y install \
@core grub2-efi-x64 \
grub2-pc-modules grub2-efi-x64-modules \
shim-x64 efibootmgr \
kernel
dnf --installroot=/mnt \
--releasever=$VERSION_ID -y install \
https://zfsonlinux.org/epel/zfs-release-2-2$(rpm --eval "%{dist}").noarch.rpm
dnf config-manager --installroot=/mnt --disable zfs
dnf config-manager --installroot=/mnt --enable zfs-kmod
dnf --installroot=/mnt --releasever=$VERSION_ID \
-y install zfs zfs-dracut
#. Configure dracut::
echo 'add_dracutmodules+=" zfs "' > /mnt/etc/dracut.conf.d/zfs.conf
#. Force load mpt3sas module if used::
if grep mpt3sas /proc/modules; then
echo 'forced_drivers+=" mpt3sas "' >> /mnt/etc/dracut.conf.d/zfs.conf
fi
#. Set locale, keymap, timezone, hostname and root password::
rm -f /mnt/etc/localtime
systemd-firstboot --root=/mnt --prompt --root-password=PASSWORD --force
if grep mpt3sas /proc/modules; then
echo 'forced_drivers+=" mpt3sas "' >> /mnt/etc/dracut.conf.d/zfs.conf
fi
if grep virtio_blk /proc/modules; then
echo 'filesystems+=" virtio_blk "' >> /mnt/etc/dracut.conf.d/fs.conf
fi
#. Generate host id::
@@ -39,10 +50,6 @@ System Configuration
dnf --installroot=/mnt install -y glibc-minimal-langpack glibc-langpack-en
#. Enable ZFS services::
systemctl enable zfs-import-scan.service zfs-mount zfs-import.target zfs-zed zfs.target --root=/mnt
#. By default SSH server is enabled, allowing root login by password,
disable SSH server::
@@ -51,16 +58,25 @@ System Configuration
#. Chroot::
m='/dev /proc /sys'
for i in $m; do mount --rbind $i /mnt/$i; done
history -w /mnt/home/sys-install-pre-chroot.txt
chroot /mnt /usr/bin/env DISK="$DISK" bash --login
history -w /mnt/home/sys-install-pre-chroot.txt
arch-chroot /mnt /usr/bin/env DISK="$DISK" bash --login
#. For SELinux, relabel filesystem on reboot::
fixfiles -F onboot
#. Generate initrd::
for directory in /lib/modules/*; do
kernel_version=$(basename $directory)
dracut --force --kver $kernel_version
done
#. Set locale, keymap, timezone, hostname and root password::
rm -f /etc/localtime
systemd-firstboot --prompt --root-password=PASSWORD --force
#. Set root password, the password set earlier does not work due to SELinux::
passwd

58
docs/Getting Started/RHEL-based distro/RHEL-based distro Root on ZFS/5-bootloader.rst
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@@ -6,27 +6,6 @@ Bootloader
.. contents:: Table of Contents
:local:
#. If using virtio disk, add driver to initrd::
echo 'filesystems+=" virtio_blk "' >> /etc/dracut.conf.d/fs.conf
#. Create empty cache file and generate initrd::
rm -f /etc/zfs/zpool.cache
touch /etc/zfs/zpool.cache
chmod a-w /etc/zfs/zpool.cache
chattr +i /etc/zfs/zpool.cache
for directory in /lib/modules/*; do
kernel_version=$(basename $directory)
dracut --force --kver $kernel_version
done
#. Load ZFS modules and disable BLS::
echo 'GRUB_ENABLE_BLSCFG=false' >> /etc/default/grub
#. Apply GRUB workaround::
echo 'export ZPOOL_VDEV_NAME_PATH=YES' >> /etc/profile.d/zpool_vdev_name_path.sh
@@ -35,41 +14,39 @@ Bootloader
# GRUB fails to detect rpool name, hard code as "rpool"
sed -i "s|rpool=.*|rpool=rpool|" /etc/grub.d/10_linux
This workaround needs to be applied for every GRUB update, as the
update will overwrite the changes.
This ``sed`` workaround needs to be applied for every
GRUB update, as the update will overwrite the
changes.
#. Install GRUB::
export ZPOOL_VDEV_NAME_PATH=YES
echo 'GRUB_ENABLE_BLSCFG=false' >> /etc/default/grub
mkdir -p /boot/efi/almalinux/grub-bootdir/i386-pc/
mkdir -p /boot/efi/almalinux/grub-bootdir/x86_64-efi/
for i in ${DISK}; do
grub2-install --target=i386-pc --boot-directory \
/boot/efi/almalinux/grub-bootdir/i386-pc/ $i
done
cp -r /usr/lib/grub/x86_64-efi/ /boot/efi/EFI/almalinux/
#. Generate GRUB menu::
grub2-mkconfig -o /boot/efi/EFI/almalinux/grub.cfg
grub2-mkconfig -o /boot/efi/almalinux/grub-bootdir/i386-pc/grub2/grub.cfg
grub2-mkconfig -o /boot/efi/EFI/almalinux/grub.cfg
grub2-mkconfig -o /boot/efi/almalinux/grub-bootdir/i386-pc/grub2/grub.cfg
#. For both legacy and EFI booting: mirror ESP content::
ESP_MIRROR=$(mktemp -d)
unalias -a
ESP_MIRROR=$(mktemp -d)
cp -r /boot/efi/EFI $ESP_MIRROR
for i in /boot/efis/*; do
cp -r $ESP_MIRROR/EFI $i
done
rm -rf $ESP_MIRROR
#. Notes for GRUB on RHEL
#. Note: you need to regenerate GRUB menu after kernel
updates, otherwise computer will still boot old
kernel on reboot::
As bls is disabled, you will need to regenerate GRUB menu after each kernel upgrade.
Or else the new kernel will not be recognized and system will boot the old kernel
on reboot.
grub2-mkconfig -o /boot/efi/EFI/almalinux/grub.cfg
grub2-mkconfig -o /boot/efi/almalinux/grub-bootdir/i386-pc/grub2/grub.cfg
Finish Installation
~~~~~~~~~~~~~~~~~~~~
@@ -87,16 +64,15 @@ Finish Installation
reboot
#. On first reboot, the boot process will fail, with failure messages such
as "You are in Emergency Mode...Press Ctrl-D to continue".
Wait for the computer to automatically reboot and the problem will be resolved.
Post installaion
~~~~~~~~~~~~~~~~
#. Install package groups::
dnf group list --hidden -v # query package groups
dnf group install @gnome-desktop
dnf group install gnome-desktop
#. Add new user, configure swap.
#. You can create a snapshot of the newly installed
system for later rollback,
see `this page <https://openzfs.github.io/openzfs-docs/Getting%20Started/Arch%20Linux/Root%20on%20ZFS/6-create-boot-environment.html>`__.