cloud-init/cloud-init.sh

#!/usr/bin/env bash
set -x

# Get IP address of the local machine and extract the last octet
LOCAL_IP=$(ip -4 addr show vmbr0 | grep -oP '(?<=inet\s)\d+(\.\d+){3}' | head -1)
if [ -z "$LOCAL_IP" ]; then
    echo "Error: Could not detect IP address on vmbr0 interface"
    exit 1
fi

IP_LAST_OCTET=$(echo "$LOCAL_IP" | cut -d. -f4)

# Validate IP last octet
if ! [[ $IP_LAST_OCTET =~ ^[0-9]+$ ]] || [ $IP_LAST_OCTET -lt 1 ] || [ $IP_LAST_OCTET -gt 254 ]; then
    echo "Error: Detected IP last octet ($IP_LAST_OCTET) is invalid. Must be between 1 and 254"
    exit 1
fi

# Define the Debian version (e.g., 11, 12, 13)
DEBIAN_VERSION="12"

# Map Debian version to its codename
case $DEBIAN_VERSION in
  11)
    CODENAME="bullseye"
    ;;
  12)
    CODENAME="bookworm"
    ;;
  13)
    CODENAME="trixie"  # Update with the correct codename when known
    ;;
  *)
    echo "Unsupported Debian version"
    exit 1
    ;;
esac

# Define the Debian cloud image directory URL
DEBIAN_IMG_DIR="https://cloud.debian.org/images/cloud/${CODENAME}/"

# Create the local images directory if it doesn't exist
LOCAL_IMG_DIR="images"
mkdir -p $LOCAL_IMG_DIR

# Get the latest image URL using wget and grep
LATEST_IMG=$(wget -qO- $DEBIAN_IMG_DIR | grep -oP '(?<=href=")[^"]*(?=/")' | grep -E '20[0-9]{6}-[0-9]{3}' | sort -V | tail -n 1)
SRC_IMG="${DEBIAN_IMG_DIR}${LATEST_IMG}/debian-${DEBIAN_VERSION}-generic-amd64-${LATEST_IMG}.qcow2"
IMG_NAME="${LOCAL_IMG_DIR}/debian-${DEBIAN_VERSION}-generic-amd64-${LATEST_IMG}.qcow2"

# Check if Git LFS is installed
if ! which git-lfs > /dev/null; then
  apt-get update
  apt-get install -y git-lfs
fi

# Pull the specific image file from Git LFS if it exists in the repository
git lfs pull --include "$IMG_NAME" || true

# Download the image if it doesn't already exist
if [ ! -f "$IMG_NAME" ]; then
   echo "New release. Downloading it now..."
   wget -O $IMG_NAME $SRC_IMG
fi

# Install libguestfs-tools if virt-customize is not available
if ! which virt-customize > /dev/null; then
  apt-get update
  apt-get install -y libguestfs-tools
fi

# Check if qm is installed and exit if not
if ! which qm > /dev/null; then
  echo "qm tool not found. Please install Proxmox VE tools and try again."
  exit 1
fi

# Inject SSH key and install qemu-guest-agent
SSH_KEY_PATH="id_rsa.pub"
virt-customize -v -x --install qemu-guest-agent -a $IMG_NAME --root-password password:coolpass --ssh-inject root:file:$SSH_KEY_PATH |& tee qemu.log

# Define VM parameters
IP_ADDRESS="10.10.0.${IP_LAST_OCTET}"
VMID="90${IP_LAST_OCTET}"  # VMID will be 9050 for IP 10.10.0.50
TEMPL_NAME="debian-${DEBIAN_VERSION}-generic-$(date +%Y%m%d)"
MEM="2048"
DISK_SIZE="64G"
DISK_STOR="local-lvm"
NET_BRIDGE="vmbr0"

# Create the VM and configure its settings
qm destroy $VMID || true
qm create $VMID --name $TEMPL_NAME --memory $MEM --net0 virtio,bridge=$NET_BRIDGE
qm importdisk $VMID $IMG_NAME $DISK_STOR
qm set $VMID --scsihw virtio-scsi-pci --scsi0 $DISK_STOR:vm-$VMID-disk-0
qm set $VMID --ide2 $DISK_STOR:cloudinit
qm set $VMID --boot c --bootdisk scsi0
qm set $VMID --serial0 socket --vga serial0
qm set $VMID --ipconfig0 ip=${IP_ADDRESS}/24,gw=10.10.0.1
qm resize $VMID scsi0 $DISK_SIZE
qm template $VMID

# Optionally, remove the downloaded image
# rm $IMG_NAME