basy-bootstrap

#!/bin/bash
set -e

if [ $# -ne 1 ]; then
  echo "No config file given!"
  exit 1
fi

if [ ! -e "${1}" ]; then
  echo "The given config file does not exist!"
  exit 1
fi
BASY_CONFIG="${1}"

BASY_VG="vg-sys"
BASY_LV="lv-sys"

source ${BASY_CONFIG}

if [ -z ${BASY_DISK1} ]; then
  echo "BASY_DISK1: not configured"
  exit 1
fi
BASY_DISK1=$(realpath "${BASY_DISK1}")

if [ -z ${BASY_DISK2} ]; then
  echo "BASY_DISK2: not configured"
  exit 1
fi
BASY_DISK2=$(realpath "${BASY_DISK2}")

if [ ! -b "${BASY_DISK1}" ]; then
  echo "BASY_DISK1: ${BASY_DISK1} is not a block device!"
  exit 1
fi
if [ ! -b "${BASY_DISK2}" ]; then
  echo "BASY_DISK2: ${BASY_DISK2} is not a block device!"
  exit 1
fi

if [ "${BASY_DISK1}" -ef "${BASY_DISK2}" ]
then
  echo "BASY_DISK1/2: you must specify diffrent block devices!"
  exit 1
fi


### Eventuell bestehendes Logical Volume entfernen
if [ -e "/dev/${BASY_VG}/${BASY_LV}" ]; then
  wipefs -a "/dev/${BASY_VG}/${BASY_LV}"
  lvremove --force "${BASY_VG}/${BASY_LV}"
  vgremove --force "${BASY_VG}"
fi


### Systemfestplatten partitionieren
for BASY_DISK in ${BASY_DISK1} ${BASY_DISK2}
do
  wipefs -a "${BASY_DISK}"
  sfdisk --no-reread -w always -W always --force "${BASY_DISK}" <<EOT
label: gpt
unit: sectors

start=2048, size=2048, type=21686148-6449-6E6F-744E-656564454649
start=4096, type=E6D6D379-F507-44C2-A23C-238F2A3DF928
EOT
done


### Volume Group und Logical Volume anlegen
vgcreate "${BASY_VG}" "${BASY_DISK1}2" "${BASY_DISK2}2"
lvcreate -m1 -L8G -n "${BASY_LV}" "${BASY_VG}"


### BTRFS Filesystem anlegen und mounten
wipefs -a "/dev/${BASY_VG}/${BASY_LV}"
mkfs.btrfs -f "/dev/${BASY_VG}/${BASY_LV}"

mount "/dev/${BASY_VG}/${BASY_LV}" /mnt/
btrfs subvolume create /mnt/@
btrfs subvolume create /mnt/@home
btrfs subvolume create /mnt/@snapshot


### Ubuntu Basissystem installieren
apt update
apt install -y debootstrap
debootstrap --arch amd64 bionic /mnt/@

btrfs subvolume snapshot /mnt/@ /mnt/@snapshot/@-`date -u +%Y%m%d%H%M%S`-basy-bootstrap
umount /mnt


### In das Basissystem wechseln
mount "/dev/${BASY_VG}/${BASY_LV}" /mnt/ -o subvol=@
mount "/dev/${BASY_VG}/${BASY_LV}" /mnt/home -o subvol=@home

mkdir /mnt/snapshot
mount "/dev/${BASY_VG}/${BASY_LV}" /mnt/snapshot -o subvol=@snapshot

cp -L /etc/resolv.conf /mnt/etc/

mount -o rbind /dev /mnt/dev
mount --make-rslave /mnt/dev
mount -o rbind /sys /mnt/sys
mount --make-rslave /mnt/sys
mount -t proc /proc /mnt/proc


### basy-setup
cp basy-setup /mnt/basy-setup
cp ${BASY_CONFIG} /mnt/basy-config

chmod u+x /mnt/basy-setup
chroot /mnt /basy-setup

rm /mnt/basy-config
rm /mnt/basy-setup

btrfs subvolume snapshot /mnt /mnt/snapshot/@-`date -u +%Y%m%d%H%M%S`-basy-setup