193 lines
No EOL
4.5 KiB
Markdown
193 lines
No EOL
4.5 KiB
Markdown
# Installation
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To install the Alpine Linux distribution on the system, the datasets of the system pool and the EFI partitions have to be mounted to the main system.
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First import the system pool
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```
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# zpool import -N -R /mnt tank
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```
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Mount the datasets in the system pool and decrypt the home dataset
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```
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# zfs mount tank/root/alpine
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# zfs load-key -L prompt tank/home
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# zfs mount tank/home
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# zfs mount tank/var
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```
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Mount the ESP
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```
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# mkdir /mnt/esp
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# mount /dev/md/esp /mnt/esp -t vfat
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```
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Then install Alpine Linux
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```
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# setup-disk -m sys /mnt
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```
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This will also add `grub` as bootloader which will be replaced but for now it will reside on the ESP.
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To make it possible to chroot into the system, mount the other directories:
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```
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# for i in dev proc sys run; do
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> mount --rbind --make-rslave /$i /mnt/$i
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> done
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# chroot /mnt
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```
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The other setup scripts can be used to configure key aspects of the system. Besides that a few necessary services have to be activated.
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```
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# setup-hostname <hostname>
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# setup-keymap us us-euro
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# setup-timezone -i <area>/<subarea>
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# setup-ntp openntpd
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# rc-update add acpid default
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# rc-update add seedrng boot
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# rm -rf /var/tmp
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# ln -s /tmp /var/tmp
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# passwd root
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```
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> The root password does not really matter because it is going to be locked after a user has been created.
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Set the `hwclock` to use `UTC` in `/etc/conf.d/hwclock` and disable writing the time to hardware. Running a NTP negates its usability.
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```
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clock="UTC"
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clock_hctosys="NO"
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clock_systohc="NO"
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```
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Configure the ESP raid array to mount
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```
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# modprobe raid1
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# echo raid1 >> /etc/modules-load.d/raid1.conf
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# mdadm --detail --scan >> /etc/mdadm.conf
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# rc-update add mdadm boot
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# rc-update add mdadm-raid boot
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```
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Configure ZFS to mount
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```
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rc-update add zfs-import sysinit
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rc-update add zfs-mount sysinit
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```
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Edit `/etc/fstab` for correct mounts:
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```
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/dev/md/esp /esp vfat defaults,nodev,nosuid,noexec 0 2
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tmpfs /tmp tmpfs rw,size=4G,nr_inodes=5k,nodev,nosuid,noexec,mode=1777 0 0
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proc /proc proc nodev,nosuid,noexec,hidepid=2 0 0
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```
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By default, Alpine Linux uses `mkinitfs` to create an initial ram filesystem, although it is minimal that also means that it lacks some functionality which is needed for a proper setup. Because of this `mkinitfs` and `grub-efi `will be replaced with `booster` and `secureboot-hook`.
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```
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# apk add booster secureboot-hook sbctl
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# apk del mkinitfs grub-efi
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```
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To configure booster edit `/etc/booster.yaml`:
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```
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enable_zfs: true
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busybox: false
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modules: vfat,nls_cp437,nls_iso8859_1
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```
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The most important step is the creation of a UKI using `secureboot-hook` which also automatically signs them. First the hook itself will have to be tweaked to use `booster` instead of `mkinitfs`, edit `/etc/kernel-hooks.d/50-secureboot.hook` and change the line:
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```
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/sbin/mkinitfs -o "$tmpdir"/initramfs "$NEW_VERSION-$FLAVOR"
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```
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to:
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```
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/usr/bin/booster build "$tmpdir"/initramfs --kernel-version "$NEW_VERSION-$FLAVOR"
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```
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and configure `/etc/kernel-hooks.d/secureboot.conf` for cmdline and secureboot.
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```
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cmdline="rw zfs=tank/root/alpine quiet splash"
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signing_cert="/usr/share/secureboot/keys/db/db.pem"
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signing_key="/usr/share/secureboot/keys/db/db.key"
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output_dir="/esp/efi/linux"
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output_name="alpine-linux-{flavor}.efi"
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```
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Use `sbctl` to create secureboot keys and sign them.
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```
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# sbctl create-keys
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# sbctl enroll-keys
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```
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> Whilst enrolling the keys it might be necessary to add the `--microsoft` flag if you are unable to use custom keys.
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Set the cache-file of the ZFS pool
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```
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# zpool set cachefile=/etc/zfs/zpool.cache tank
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```
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Now to see if everything went successfully, run:
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```
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# apk fix kernel-hooks
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```
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and it should give no warnings if done properly.
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As discussed earlier `grub` will be replaced, install `gummiboot` as a bootloader.
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```
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# apk add gummiboot
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# mkdir /esp/loader
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# mkdir /esp/efi/boot
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# cp /usr/lib/gummiboot/gummibootx64.efi /esp/efi/boot/bootx64.efi
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```
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Sign the bootloader with `sbctl`
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```
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# sbctl sign -s /esp/efi/boot/bootx64.efi
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```
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And also remove some remnants of `grub`.
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```
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# rm -rf /boot/grub
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# rm -rf /etc/default
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# cd /boot && unlink boot && cd ..
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```
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`gummiboot` can be configured with the file `/esp/loader/loader.conf` with which the timeout and the default OS can be specified.
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```
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default alpine-linux-lts.efi
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timeout 2
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editor no
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```
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Now exit the chroot and you should be able to reboot into a working Alpine system.
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```
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# exit
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# umount -lf /mnt
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# zpool export tank
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# reboot
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``` |