sh/bash/hetzner-rescue.sh

function hetzner-rescue-configure {
local hostname="${1}"
    local package
    local packages=(
    'mosh'
    'screen' 'tmux' 'byobu'
    'apt-file'
    )
    # apt / conf
    echo -n "\
Acquire::AllowInsecureRepositories False;
Acquire::AllowWeakRepositories False;
Acquire::AllowDowngradeToInsecureRepositories False;
Acquire::Check-Valid-Until True;
APT::Install-Recommends False;
APT::Install-Suggests False;
APT::Get::Show-Versions True;
Dir::Etc::SourceParts '';
Dpkg::Progress True;
" > '/etc/apt/apt.conf'
    # apt / sources
    echo -n "\
deb https://deb.debian.org/debian bookworm main non-free-firmware contrib non-free
deb https://deb.debian.org/debian bookworm-backports main non-free-firmware contrib non-free
deb https://deb.debian.org/debian bookworm-updates main non-free-firmware contrib non-free
deb https://deb.debian.org/debian-security bookworm-security main non-free-firmware contrib non-free
" > '/etc/apt/sources.list'
    # bash / rc
    main_link_bashrc
    mv .bashrc .bashrc.old
    # host name
    hostname "${hostname}"
    # locales
    echo -n "\
en_US.UTF-8 UTF-8
fr_FR.UTF-8 UTF-8
" > '/etc/locale.gen'
    # generate locales
    locale-gen
    # update catalog
    apt-get update
    #
    debian_disable_frontend
    # install packages
    for package in "${packages[@]}" ; do
        echo ; echo "${package}"
        apt-get install \
        --assume-yes \
        "${package}"
        apt_clean_cache
    done
    # update catalog
    apt-get update
}

function hetzner-rescue-install {
    local package
    local release='bookworm'
    local packages=(
    # installed
    'dmidecode' 'efibootmgr' 'pciutils' 'usbutils'
    'parted' 'mdadm' 'cryptsetup-bin' 'lvm2'
    'btrfs-progs' 'dosfstools'
    'git' 'nano' 'python3' 'rsync' 'vim'
    'file' 'htop' 'lsof' 'man-db' 'tree' 'uuid-runtime'
    # install
    'lshw'
    'duperemove' 'squashfs-tools'
    'grub-efi-amd64-bin' 'grub-pc-bin'
    'libdigest-sha3-perl' 'micro'
    'iotop'
    'exa' 'ipcalc' 'lf' 'ncdu' 'nnn' 'ranger'
    )
    local backports=(
    )
    # update catalog
    apt-get update
    #
    debian_disable_frontend
    # upgrade packages
    apt-get upgrade --assume-yes
    #
    apt_clean_cache
    # install packages
    for package in "${packages[@]}" ; do
        echo ; echo "${package}"
        apt-get install \
        --assume-yes \
        "${package}"
        apt_clean_cache
    done
    # install backports
    for package in "${backports[@]}" ; do
        echo ; echo "${package}"
        apt-get install \
        --assume-yes \
        --target-release "${release}-backports" \
        "${package}"
        apt_clean_cache
    done
}

function hetzner-rescue-upload {
local host="${1}"
local hostname="${2}"
if [ "${hostname}" ] ; then
    local user='root'
    #
    local user_host="${user}@${host}"
    # remove fingerprints
    ssh-keygen -R "${host}"
    # copy ssh id
    ssh-copy-id \
    -o 'StrictHostKeyChecking=accept-new' \
    "${user_host}"
    # upload root
    rsync --delete --recursive "${MAIN_BASH_ROOT}/" "${user_host}:/etc/bash/"
    # call setup
    # TODO variable
    ssh "${user_host}" -- "source '/etc/bash/main.sh' ; hetzner-rescue-configure '${hostname}'"
    # create session
    ssh "${user_host}" -- byobu new-session -d
    # send keys
    ssh "${user_host}" -- byobu send-keys 'hetzner-rescue-install' 'C-m'
    # attach session
    mosh "${user_host}" -- byobu attach-session
else
    echo 'Host?'
    return 1
fi
}

function hetzner-rescue-wipe-8-8-0-init {
    local device
    local devices=(
        '/dev/sda'
        '/dev/sdb'
    )
    local members
    local number
    local passphrase
    local unit='mib'
    # read passphrase
    echo -n 'PassPhrase: '
    read -r -s passphrase
    #
    lsblk
    echo -n 'WIPE' "${devices[@]}" '/?\ OR CANCEL /!\'
    read
    #
    number=0
    for device in "${devices[@]}" ; do
        ((number++))
        echo ; echo "#${number}: ${device}"
        #
        parted "${device}" --script mktable gpt
        #
        parted "${device}" unit "${unit}" \
        mkpart "crypt-${number}" 33282 7630885
        #
        parted "${device}" unit "${unit}" \
        mkpart "boot-${number}" 514 33282
        #
        parted "${device}" unit "${unit}" \
        mkpart "esp-${number}" 2 514
        parted "${device}" set 3 esp on
        #
        parted "${device}" unit "${unit}" \
        mkpart "bios-${number}" 1 2
        parted "${device}" set 4 bios_grub on
    done
    #
    number=0
    for device in "${devices[@]}" ; do
        ((number++))
        echo ; echo "#${number}: ${device}4"
        # wipe bios
        dd \
        if='/dev/zero' of="${device}4"
    done
    #
    number=0
    for device in "${devices[@]}" ; do
        ((number++))
        echo ; echo "#${number}: ${device}3"
        # format esp
        dd \
        if='/dev/zero' of="${device}3" bs='1M'
        mkfs.vfat \
        -F 32 \
        -S 4096 \
        -i "0000000${number}" \
        -n "esp-${number}" \
        "${device}3"
        # mount esp
        mkdir --parents "/media/esp/${number}"
        mount "${device}3" "/media/esp/${number}"
    done
    #
    number=0
    for device in "${devices[@]}" ; do
        ((number++))
        echo ; echo "#${number}: ${device}2"
        # wipe boot
        dd status='progress' \
        if='/dev/zero' of="${device}2" bs='1G' count=1
    done
    #
    members=()
    for device in "${devices[@]}" ; do
        members+=("${device}2")
    done
    mkfs.btrfs --force \
    --label 'boot' \
    --uuid '00000000-0000-0000-0000-00000000000b' \
    --checksum 'sha256' \
    --data 'raid0' \
    "${members[@]}"
    # mount boot
    mkdir --parents '/media/boot'
    mount \
    --options 'autodefrag,compress-force=zstd' \
    "${members}" '/media/boot'
    #
    number=0
    for device in "${devices[@]}" ; do
        ((number++))
        echo ; echo "#${number}: ${device}1"
        # wipe crypt head
        dd status='progress' \
        if='/dev/zero' of="${device}1" bs='1G' count=1
    done
    #
    members=()
    for device in "${devices[@]}" ; do
        members+=("${device}1")
    done
    mdadm \
    --create '/dev/md/crypt' \
    --name 'crypt' \
    --uuid '00000000:00000000:00000000:00000000' \
    --metadata 1 \
    --level 0 \
    --raid-devices ${#devices[@]} \
    "${members[@]}"
    # encrypt
    echo "${passphrase}" \
    | cryptsetup \
    --verbose \
    --batch-mode \
    --type 'luks2' \
    --pbkdf 'argon2id' \
    --cipher 'aes-xts-plain64' \
    --iter-time 8192 \
    --key-size 512 \
    --hash 'sha512' \
    --use-random \
    luksFormat \
    '/dev/md/crypt'
    # open
    echo "${passphrase}" \
    | cryptsetup luksOpen '/dev/md/crypt' 'crypt'
}

function hetzner-rescue-wipe-8-8-1-zero {
    # wipe crypt
    dd status='progress' \
    if='/dev/zero' of='/dev/mapper/crypt' bs='8G'
}

function hetzner-rescue-wipe-8-8-2-make {
    local passphrase
    # close
    cryptsetup luksClose 'crypt'
    # read passphrase
    echo -n 'PassPhrase: '
    read -r -s passphrase
    # encrypt
    echo "${passphrase}" \
    | cryptsetup \
    --verbose \
    --batch-mode \
    --type 'luks2' \
    --pbkdf 'argon2id' \
    --cipher 'aes-xts-plain64' \
    --iter-time 8192 \
    --key-size 512 \
    --hash 'sha512' \
    --use-random \
    luksFormat \
    '/dev/md/crypt'
    # open
    echo "${passphrase}" \
    | cryptsetup luksOpen '/dev/md/crypt' 'crypt'
    # format crypt
    mkfs.btrfs --force \
    --label 'crypt' \
    --uuid '00000000-0000-0000-0000-00000000000c' \
    --checksum 'sha256' \
    '/dev/mapper/crypt'
    # mount crypt
    mkdir --parents '/media/crypt'
    mount \
    --options 'autodefrag,compress-force=zstd' \
    '/dev/mapper/crypt' '/media/crypt'
    # make swap file
    btrfs filesystem mkswapfile \
    --size '64g' \
    --uuid '00000000-0000-0000-0000-000000000005' \
    '/media/crypt/swap'
}

function hetzner-rescue-wipe-8-8-3-close {
    umount '/media/boot'
    #
    umount '/media/crypt' \
    && cryptsetup luksClose 'crypt'
}