From 90b5440f138c0d9281e5a47af00e975decc7522d Mon Sep 17 00:00:00 2001
From: Marc Beninca <git@marc.beninca.link>
Date: Mon, 2 Oct 2023 17:30:04 +0200
Subject: [PATCH] hetzner/cp

---
 bash/hetzner-rescue.sh | 179 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 179 insertions(+)
 create mode 100644 bash/hetzner-rescue.sh

diff --git a/bash/hetzner-rescue.sh b/bash/hetzner-rescue.sh
new file mode 100644
index 0000000..bcd66c4
--- /dev/null
+++ b/bash/hetzner-rescue.sh
@@ -0,0 +1,179 @@
+function ovh-rescue-configure {
+local host="${1}"
+    local packages=(
+    'byobu' 'mosh'
+    )
+    # apt / conf
+    echo -n "\
+Acquire::AllowInsecureRepositories False;
+Acquire::AllowWeakRepositories False;
+Acquire::AllowDowngradeToInsecureRepositories False;
+Acquire::Check-Valid-Until True;
+APT::Install-Recommends False;
+APT::Install-Suggests False;
+APT::Get::Show-Versions True;
+Dir::Etc::SourceParts '';
+Dpkg::Progress True;
+" > '/etc/apt/apt.conf'
+    # apt / sources
+    echo -n "\
+deb https://deb.debian.org/debian buster main contrib non-free
+deb https://deb.debian.org/debian buster-backports main contrib non-free
+deb https://deb.debian.org/debian buster-updates main contrib non-free
+deb https://deb.debian.org/debian-security buster/updates main contrib non-free
+" > '/etc/apt/sources.list'
+    # bash / rc
+    main_link_bashrc
+    # host name
+    hostname "${host}"
+    # locales
+    echo -n "\
+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 "${packages[@]}"
+    #
+    apt_clean_cache
+}
+
+function ovh-rescue-install {
+    local release='buster'
+    local packages=(
+    # installed
+    'parted' 'mdadm' 'lvm2'
+    # install
+    'lshw'
+    'file' 'micro'
+    'grub-efi-amd64-bin' 'grub-pc-bin'
+    'htop' 'iotop' 'lsof'
+    'exa' 'ncdu' 'nnn' 'ranger' 'tree'
+    'squashfs-tools'
+    'uuid-runtime'
+    )
+    local backports=(
+    # installed
+    'cryptsetup-bin' 'rsync'
+    # install
+    'git'
+    )
+    # update catalog
+    apt-get update
+    #
+    debian_disable_frontend
+    # upgrade packages
+    apt-get upgrade --assume-yes
+    #
+    apt_clean_cache
+    # install packages
+    apt-get install --assume-yes "${packages[@]}"
+    #
+    apt_clean_cache
+    # install backports
+    apt-get install --assume-yes \
+    --target-release "${release}-backports" "${backports[@]}"
+    #
+    apt_clean_cache
+}
+
+function 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 "${user_host}" -- byobu attach-session
+else
+    echo 'Host?'
+    return 1
+fi
+}
+
+function ovh-rescue-wipe-1-2TB {
+    local device='/dev/sda'
+    local unit='mib'
+    #
+    lsblk
+    echo -n 'WIPE' "${device}" '/?\ OR CANCEL /!\'
+    read
+    #
+    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 "${device}" set 4 bios_grub on
+    # wipe bios
+    dd if='/dev/zero' of='/dev/sda4'
+    # format esp
+    mkfs.vfat -F 32 -n 'esp' '/dev/sda3'
+    # format boot
+    mkfs.ext4 -F -L 'boot' '/dev/sda2'
+    # read passphrase
+    local passphrase
+    echo -n 'PassPhrase: '
+    read -r -s passphrase
+    # encrypt
+    echo "${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/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'
+}