sh/bash/ovh-rescue.sh

#! /usr/bin/env sh

ovh_rescue_configure() {
    local host="${1}"
    # apt / conf
    printf "\
Acquire::AllowInsecureRepositories False;
Acquire::AllowWeakRepositories False;
Acquire::AllowDowngradeToInsecureRepositories False;
Acquire::Check-Valid-Until True;
APT::Install-Recommends False;
APT::Install-Suggests False;
APT::Get::Show-Versions True;
Dir::Etc::SourceParts '';
Dpkg::Progress True;
" > "/etc/apt/apt.conf"
    # apt / sources
    printf "\
deb https://deb.debian.org/debian buster main contrib non-free
deb https://deb.debian.org/debian buster-backports main contrib non-free
deb https://deb.debian.org/debian buster-updates main contrib non-free
deb https://deb.debian.org/debian-security buster/updates main contrib non-free
" > "/etc/apt/sources.list"
    # bash / rc
    main_link_bashrc
    # host name
    hostname "${host}"
    # locales
    printf "\
en_US.UTF-8 UTF-8
fr_FR.UTF-8 UTF-8
" > '/etc/locale.gen'
    # fix alias
    rm --force "/usr/share/locale/locale.alias"
    ln --symbolic "/etc/locale.alias" "/usr/share/locale/locale.alias"
    # generate locales
    locale-gen
    # update catalog
    apt-get update
    #
    debian_disable_frontend
    # install packages
    apt-get install --assume-yes \
    "byobu" \
    "mosh"
    #
    apt_clean_cache
}

ovh_rescue_install() {
    local release="buster"
    # update catalog
    apt-get update
    #
    debian_disable_frontend
    # upgrade packages
    apt-get upgrade --assume-yes
    #
    apt_clean_cache
    # install packages
    apt-get install --assume-yes \
    "parted" "mdadm" "lvm2" \
\
    "lshw" \
    "file" "micro" \
    "grub-efi-amd64-bin" "grub-pc-bin" \
    "htop" "iotop" "lsof" \
    "exa" "ncdu" "nnn" "ranger" "tree" \
    "squashfs-tools" \
    "uuid-runtime"
    #
    apt_clean_cache
    # install backports
    apt-get install --assume-yes \
    --target-release "${release}-backports" \
    "cryptsetup-bin" "rsync" \
\
    "git"
    #
    apt_clean_cache
}

ovh_rescue_upload() {
local host="${1}"
if [ "${host}" ] ; 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 "${user_host}" -- \
        "source \"/etc/bash/main.sh\" ; ovh-rescue-configure \"${host}\""
    # create session
    ssh "${user_host}" -- byobu new-session -d
    # send keys
    ssh "${user_host}" -- byobu send-keys "ovh-rescue-install" "C-m"
    # attach session
    mosh "${user_host}" -- byobu attach-session
else
    echo 'Host?'
    return 1
fi
}

ovh_rescue_wipe_1_2TB() {
    local device="/dev/sda"
    local unit="mib"
    #
    lsblk
    printf "%s" "WIPE ${device} /?\\ OR CANCEL /!\\"
    read -r
    #
    parted "${device}" --script mktable gpt
    #
    parted "${device}" unit "${unit}" mkpart "crypt" 65795 1907729
    #
    parted "${device}" unit "${unit}" mkpart "boot" 259 65795
    #
    parted "${device}" unit "${unit}" mkpart "esp" 2 259
    parted "${device}" set 3 esp on
    #
    parted "${device}" unit "${unit}" mkpart bios 1 2
    parted "${device}" set 4 bios_grub on
    # wipe bios
    dd if="/dev/zero" of="/dev/sda4"
    # format esp
    mkfs.vfat -F 32 -n "esp" "/dev/sda3"
    # format boot
    mkfs.ext4 -F -L "boot" "/dev/sda2"
    # read passphrase
    local passphrase
    printf "PassPhrase: "
    read -r -s passphrase
    # encrypt
    echo "${passphrase}" \
    | cryptsetup \
    --verbose \
    --batch-mode \
    --type "luks2" \
    --pbkdf "argon2id" \
    --cipher "aes-xts-plain64" \
    --iter-time 8192 \
    --key-size 512 \
    --hash "sha512" \
    --use-random \
    luksFormat \
    "/dev/sda1"
    # open
    echo "${passphrase}" \
    | cryptsetup luksOpen "/dev/sda1" "crypt"
    # pv
    pvcreate "/dev/mapper/crypt"
    # vg
    vgcreate "crypt" "/dev/mapper/crypt"
    # lv swap
    lvcreate --name "swap" --size "68719476736b" "crypt"
    # lv data
    lvcreate --name "data" --extents "100%FREE" "crypt"
    # format swap
    mkswap --label "swap" "/dev/mapper/crypt-swap"
    # format data
    mkfs.ext4 -L "data" "/dev/mapper/crypt-data"
    # vg off
    vgchange --activate "n" "crypt"
    # close
    cryptsetup luksClose "crypt"
}