proxmox-bootstrap.sh

#!/bin/bash
set -euo pipefail

CHROOT_PART="/dev/sda3"
CHROOT_DIR="/mnt/proxmox"

die() { echo "$*" 1>&2 ; exit 1; }

echo "Checking for debootstrap package"
pacman -Q debootstrap >/dev/null 2>&1 \
  || sudo pacman -Sy debootstrap

echo "Creating chroot directory"
sudo mkdir -p "$CHROOT_DIR"

echo "Mounting chroot partition"
sudo mount "$CHROOT_PART" "$CHROOT_DIR"

echo "Bootstrapping Debian"
sudo debootstrap stable "$CHROOT_DIR" http://deb.debian.org/debian/

echo "Entering chroot"
sudo arch-chroot "$CHROOT_DIR" /bin/bash -- <<EOF
set -e
source /etc/profile

echo 'Configuring Debian locales'
apt update
apt install -y locales wget
dpkg-reconfigure locales

echo 'Set default Debian root password'
echo "root" | passwd --stdin

echo 'Setting up network'
echo 'proxhost' > /etc/hostname
netdev="$(ls -x /sys/class/net | grep enp | head -n1)"
cat <<NETEOF >> /etc/network/interfaces
auto $netdev
allow-hotplug $netdev
iface $netdev inet dhcp
NETEOF
ifup -a
netip="$(ip route get 8.8.8.8 | grep -oP 'src \K[^ ]+')"
cat <<NETEOF > /etc/hosts
127.0.0.1     localhost
$netip proxhost pvelocalhost
NETEOF

echo 'Bootstrapping Proxmox'
echo "deb [arch=amd64] http://download.proxmox.com/debian/pve bullseye pve-no-subscription" \
  > /etc/apt/sources.list.d/pve-install-repo.list
wget https://enterprise.proxmox.com/debian/proxmox-release-bullseye.gpg \
  -O /etc/apt/trusted.gpg.d/proxmox-release-bullseye.gpg 
apt update
apt full-upgrade -y
apt install -y proxmox-ve postfix open-iscsi ifupdown2
apt remove -y linux-image-amd64 'linux-image-*' os-prober
source /etc/profile
update-grub
rm /etc/apt/sources.list.d/pve-enterprise.list
EOF

echo "Done."