#!/bin/bash
# clone-vm.sh
# Clones a Proxmox VM template into a new full VM.
# Run this on the same node where the template lives (local storage).
#
# Usage:
#   ./clone-vm.sh <TEMPLATE_VMID> <NEW_VMID> <NAME> [CORES] [MEMORY_MB] [DISK_SIZE]
#
# Examples:
#   ./clone-vm.sh 100 101 k3s-control-1
#   ./clone-vm.sh 100 202 k3s-worker-1 6 8192 100G
#
# Defaults:
#   CORES      = 2
#   MEMORY_MB  = 2048
#   DISK_SIZE  = 20G
#
# Note: Template must exist on the local node (local-lvm).
# Run create-debian-template.sh on each node first.

set -euo pipefail

TEMPLATE_VMID="${1:?Usage: $0 <TEMPLATE_VMID> <NEW_VMID> <NAME> [CORES] [MEMORY_MB] [DISK_SIZE]}"
NEW_VMID="${2:?Usage: $0 <TEMPLATE_VMID> <NEW_VMID> <NAME> [CORES] [MEMORY_MB] [DISK_SIZE]}"
NAME="${3:?Usage: $0 <TEMPLATE_VMID> <NEW_VMID> <NAME> [CORES] [MEMORY_MB] [DISK_SIZE]}"
CORES="${4:-2}"
MEMORY="${5:-2048}"
DISK_SIZE="${6:-20G}"

echo "==> Cloning template ${TEMPLATE_VMID} to ${NEW_VMID} (${NAME})..."
qm clone "${TEMPLATE_VMID}" "${NEW_VMID}" --name "${NAME}" --full

echo "==> Setting resources: ${CORES} cores, ${MEMORY}MB RAM..."
qm set "${NEW_VMID}" --cores "${CORES}" --memory "${MEMORY}"

echo "==> Resizing disk to ${DISK_SIZE}..."
qm resize "${NEW_VMID}" scsi0 "${DISK_SIZE}"

echo "==> Setting hostname via Cloud-Init..."
qm set "${NEW_VMID}" --ciuser samantha --ipconfig0 ip=dhcp

echo "==> Starting VM..."
qm start "${NEW_VMID}"

echo ""
echo "Done. VM ${NEW_VMID} (${NAME}) started."
echo "Find its IP: qm guest cmd ${NEW_VMID} network-get-interfaces"