Alpine: Use ZFS for /boot, updated bootloader instructions
Signed-off-by: Maurice Zhou <ja@apvc.uk>
This commit is contained in:
Maurice Zhou
committed by
George Melikov
George Melikov
parent
82988571d1
commit
b35065b4fc
@@ -36,8 +36,21 @@ Preparation
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ssh root@192.168.1.19
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#. Configure NTP client for time synchronization::
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setup-ntp chrony
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#. Pick a mirror from `Alpine Mirrors <https://mirrors.alpinelinux.org/>`__
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and add it to package manager configuration::
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tee -a /etc/apk/repositories <<EOF
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https://dl-5.alpinelinux.org/alpine/latest-stable/community/
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https://dl-5.alpinelinux.org/alpine/latest-stable/main/
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EOF
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#. Throughout this guide, we use predictable disk names generated by udev::
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apk update
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apk add eudev
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setup-udev
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@@ -59,21 +72,8 @@ Preparation
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DISK='/dev/disk/by-id/disk1'
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#. Configure NTP client for time synchronization::
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setup-ntp chrony
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#. Pick a mirror from `Alpine Mirrors <https://mirrors.alpinelinux.org/>`__
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and add it to package manager configuration::
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tee -a /etc/apk/repositories <<EOF
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https://dl-5.alpinelinux.org/alpine/latest-stable/community/
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https://dl-5.alpinelinux.org/alpine/latest-stable/main/
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EOF
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#. Install ZFS support and partition tool::
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apk update
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apk add zfs zfs-lts sgdisk e2fsprogs
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modprobe zfs
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@@ -37,9 +37,41 @@ System Installation
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#. Create boot partition::
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for i in ${DISK}; do
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mkfs.ext4 -F $i-part2
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done
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tee -a /root/grub2 <<EOF
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# Features which are supported by GRUB2
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async_destroy
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bookmarks
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embedded_data
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empty_bpobj
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enabled_txg
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extensible_dataset
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filesystem_limits
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hole_birth
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large_blocks
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lz4_compress
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spacemap_histogram
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EOF
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zpool create \
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-o compatibility=/root/grub2 \
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-o ashift=12 \
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-o autotrim=on \
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-O acltype=posixacl \
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-O canmount=off \
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-O compression=lz4 \
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-O devices=off \
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-O normalization=formD \
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-O relatime=on \
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-O xattr=sa \
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-O mountpoint=/boot \
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-R /mnt \
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bpool \
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mirror \
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$(for i in ${DISK}; do
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printf "$i-part2 ";
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done)
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If not using a multi-disk setup, remove ``mirror``.
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#. Create root pool::
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@@ -91,14 +123,17 @@ System Installation
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zfs create -o canmount=off -o mountpoint=/var rpool/alpine/var
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zfs create -o canmount=on rpool/alpine/var/lib
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zfs create -o canmount=on rpool/alpine/var/log
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#. Mount /boot::
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mkdir -p /mnt/boot
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mount -t ext4 $(echo $DISK | cut -f1 -d\ )-part2 /mnt/boot/
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zfs create -o canmount=off -o mountpoint=none bpool/alpine
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zfs create -o canmount=on -o mountpoint=/boot bpool/alpine/root
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#. Format and mount ESP::
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for i in ${DISK}; do
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mkfs.vfat -n EFI ${i}-part1
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mkdir -p /mnt/boot/efis/${i##*/}-part1
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mount -t vfat ${i}-part1 /mnt/boot/efis/${i##*/}-part1
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done
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mkdir -p /mnt/boot/efi
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mount -t vfat $(echo $DISK | cut -f1 -d\ )-part1 /mnt/boot/efi
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@@ -124,22 +159,6 @@ System Installation
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chroot /mnt /usr/bin/env DISK=$DISK sh
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#. Apply GRUB workaround::
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echo 'export ZPOOL_VDEV_NAME_PATH=YES' >> /etc/profile.d/zpool_vdev_name_path.sh
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source /etc/profile.d/zpool_vdev_name_path.sh
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sed -i "s|rpool=.*|rpool=rpool|" /etc/grub.d/10_linux
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sed -i 's|stat -f -c %T /|echo zfs|' /usr/sbin/grub-mkconfig
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This workaround needs to be applied for every GRUB update, as the
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update will overwrite the changes.
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#. Generate GRUB menu::
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grub-mkconfig -o /boot/grub/grub.cfg
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#. Rebuild initrd::
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mkdir -p /etc/zfs
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@@ -171,15 +190,51 @@ System Installation
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#. Mount datasets with zfsutil option::
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sed -i 's|,posixacl|,zfsutil,posixacl|' /etc/fstab
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#. Apply GRUB workaround::
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echo 'export ZPOOL_VDEV_NAME_PATH=YES' >> /etc/profile.d/zpool_vdev_name_path.sh
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source /etc/profile.d/zpool_vdev_name_path.sh
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# GRUB fails to detect rpool name, hard code as "rpool"
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sed -i "s|rpool=.*|rpool=rpool|" /etc/grub.d/10_linux
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# BusyBox stat does not recognize zfs, replace fs detection with ZFS
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sed -i 's|stat -f -c %T /|echo zfs|' /usr/sbin/grub-mkconfig
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# grub-probe fails to identify fs mounted at /boot
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sed -i "s|GRUB_DEVICE_BOOT=.*|GRUB_DEVICE_BOOT=$(echo $DISK | cut -f1 -d\ )-part2|" /usr/sbin/grub-mkconfig
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This workaround needs to be applied for every GRUB update, as the
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update will overwrite the changes.
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#. Install GRUB::
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export ZPOOL_VDEV_NAME_PATH=YES
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mkdir -p /boot/efi/alpine/grub-bootdir/i386-pc/
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mkdir -p /boot/efi/alpine/grub-bootdir/x86_64-efi/
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for i in ${DISK}; do
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grub-install --target=i386-pc $i
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grub-install --target=i386-pc --boot-directory \
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/boot/efi/alpine/grub-bootdir/i386-pc/ $i
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done
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grub-install --target x86_64-efi --bootloader-id alpine --removable
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grub-install --target x86_64-efi --boot-directory \
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/boot/efi/alpine/grub-bootdir/x86_64-efi/ --efi-directory \
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/boot/efi --bootloader-id alpine --removable
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#. Generate GRUB menu::
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grub-mkconfig -o /boot/efi/alpine/grub-bootdir/x86_64-efi/grub/grub.cfg
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grub-mkconfig -o /boot/efi/alpine/grub-bootdir/i386-pc/grub/grub.cfg
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#. For both legacy and EFI booting: mirror ESP content::
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ESP_MIRROR=$(mktemp -d)
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cp -r /boot/efi/EFI $ESP_MIRROR
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for i in /boot/efis/*; do
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cp -r $ESP_MIRROR/EFI $i
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done
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rm -rf $ESP_MIRROR
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#. Unmount filesystems::
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exit
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@@ -193,11 +248,10 @@ System Installation
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Disconnect the live media and other non-boot storage devices.
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Due to missing support of predictable device names in initrd,
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Alpine Linux will mount whichever disk appears to be /dev/sda or /dev/nvme0
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at /boot and /boot/efi at boot.
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at /boot/efi at boot.
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Root filesystem at / is ZFS and imported via pool name thus not affected by the above restriction.
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Root filesystem at / and /boot are ZFS and imported via pool name thus not affected by the above restriction.
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#. Post-install:
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#. Setup mirroring of /boot partition and /boot/efi via dd.
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#. Setup swap.
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