honestly its been months, i found unstaged changes and forgot
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#!/usr/bin/env bash
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set -euo pipefail
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VMID=9000
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NAME=debian-13-genericcloud
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IMAGE_URL=https://cloud.debian.org/images/cloud/trixie/latest/debian-13-genericcloud-amd64.qcow2
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IMAGE_FILE=
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CACHE_DIR=/var/lib/vz/template/qcow2
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STORAGE=local-lvm
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CLOUDINIT_STORAGE=
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BRIDGE=vmbr0
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MEMORY=2048
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CORES=2
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CPU=host
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DISK_SIZE=32G
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MACHINE=q35
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BIOS=ovmf
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SCSI_HW=virtio-scsi-pci
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NET_MODEL=virtio
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PBS_STORAGE=
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DRY_RUN=0
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ASSUME_YES=0
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INTERACTIVE=1
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VMID_SET=0
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NAME_SET=0
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IMAGE_URL_SET=0
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IMAGE_FILE_SET=0
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CACHE_DIR_SET=0
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STORAGE_SET=0
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CLOUDINIT_STORAGE_SET=0
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BRIDGE_SET=0
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MEMORY_SET=0
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CORES_SET=0
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CPU_SET=0
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DISK_SIZE_SET=0
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PBS_STORAGE_SET=0
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usage() {
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cat <<'USAGE'
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Create a Proxmox VM template from the Debian 13 GenericCloud image.
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Run this on a Proxmox node as root.
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Usage:
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scripts/create-proxmox-template.sh [options]
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Options:
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--vmid ID Template VMID. Default: 9000
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--name NAME Template name. Default: debian-13-genericcloud
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--storage STORAGE Disk storage. Default: local-lvm
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--cloudinit-storage NAME Cloud-Init storage. Default: same as --storage
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--bridge BRIDGE Network bridge. Default: vmbr0
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--memory MB Memory in MB. Default: 2048
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--cores N vCPU count. Default: 2
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--cpu TYPE CPU type. Default: host
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--disk-size SIZE Resize imported disk to this size. Default: 32G
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--image-url URL Debian GenericCloud qcow2 URL.
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--image-file PATH Use an existing local qcow2 instead of downloading.
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--cache-dir PATH Download cache directory. Default: /var/lib/vz/template/qcow2
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--pbs-storage NAME PBS storage/datastore ID. Enables main disk backup flag when set.
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--dry-run Print commands without executing them.
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--yes Accept defaults for any unanswered prompts.
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--non-interactive Do not prompt; use defaults and provided flags.
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-h, --help Show this help.
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The template is configured with:
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- Q35 machine type
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- OVMF / UEFI
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- VirtIO SCSI
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- VirtIO network
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- QEMU guest agent
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- Cloud-Init drive
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- serial0 socket
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- vga serial0 for Proxmox xterm.js console support
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USAGE
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}
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prompt_value() {
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local label=$1
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local default_value=$2
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local value
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if [ "$ASSUME_YES" -eq 1 ] || [ "$INTERACTIVE" -eq 0 ] || [ ! -t 0 ]; then
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printf '%s\n' "$default_value"
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return 0
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fi
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printf '%s [%s]: ' "$label" "$default_value" >&2
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read -r value
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if [ -z "$value" ]; then
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printf '%s\n' "$default_value"
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else
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printf '%s\n' "$value"
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fi
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}
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prompt_optional_value() {
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local label=$1
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local value
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if [ "$ASSUME_YES" -eq 1 ] || [ "$INTERACTIVE" -eq 0 ] || [ ! -t 0 ]; then
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printf '\n'
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return 0
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fi
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printf '%s [leave empty]: ' "$label" >&2
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read -r value
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printf '%s\n' "$value"
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}
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prompt_confirm() {
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local label=$1
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local value
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if [ "$ASSUME_YES" -eq 1 ] || [ "$INTERACTIVE" -eq 0 ] || [ ! -t 0 ]; then
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return 0
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fi
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printf '%s [Y/n]: ' "$label" >&2
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read -r value
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case "$value" in
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""|y|Y|yes|YES)
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return 0
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;;
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*)
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return 1
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;;
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esac
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}
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log() {
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printf '%s\n' "$*"
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}
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die() {
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printf 'ERROR: %s\n' "$*" >&2
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exit 1
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}
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run() {
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if [ "$DRY_RUN" -eq 1 ]; then
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printf '+'
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printf ' %q' "$@"
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printf '\n'
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return 0
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fi
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"$@"
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}
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need_command() {
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command -v "$1" >/dev/null 2>&1 || die "required command not found: $1"
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}
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download_image() {
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local url=$1
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local dest=$2
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if [ -s "$dest" ]; then
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log "Using cached image: $dest"
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return 0
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fi
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run mkdir -p "$(dirname "$dest")"
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if command -v curl >/dev/null 2>&1; then
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run curl -fL --retry 3 --retry-delay 2 -o "$dest" "$url"
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elif command -v wget >/dev/null 2>&1; then
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run wget -O "$dest" "$url"
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else
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die "curl or wget is required to download the image"
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fi
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}
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parse_args() {
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while [ "$#" -gt 0 ]; do
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case "$1" in
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--vmid)
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VMID=${2:?missing value for --vmid}
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VMID_SET=1
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shift 2
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;;
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--name)
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NAME=${2:?missing value for --name}
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NAME_SET=1
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shift 2
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;;
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--storage)
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STORAGE=${2:?missing value for --storage}
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STORAGE_SET=1
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shift 2
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;;
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--cloudinit-storage)
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CLOUDINIT_STORAGE=${2:?missing value for --cloudinit-storage}
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CLOUDINIT_STORAGE_SET=1
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shift 2
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;;
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--bridge)
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BRIDGE=${2:?missing value for --bridge}
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BRIDGE_SET=1
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shift 2
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;;
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--memory)
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MEMORY=${2:?missing value for --memory}
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MEMORY_SET=1
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shift 2
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;;
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--cores)
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CORES=${2:?missing value for --cores}
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CORES_SET=1
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shift 2
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;;
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--cpu)
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CPU=${2:?missing value for --cpu}
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CPU_SET=1
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shift 2
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;;
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--disk-size)
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DISK_SIZE=${2:?missing value for --disk-size}
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DISK_SIZE_SET=1
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shift 2
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;;
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--image-url)
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IMAGE_URL=${2:?missing value for --image-url}
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IMAGE_URL_SET=1
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shift 2
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;;
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--image-file)
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IMAGE_FILE=${2:?missing value for --image-file}
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IMAGE_FILE_SET=1
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shift 2
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;;
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--cache-dir)
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CACHE_DIR=${2:?missing value for --cache-dir}
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CACHE_DIR_SET=1
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shift 2
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;;
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--pbs-storage)
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PBS_STORAGE=${2:?missing value for --pbs-storage}
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PBS_STORAGE_SET=1
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shift 2
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;;
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--dry-run)
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DRY_RUN=1
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shift
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;;
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--yes)
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ASSUME_YES=1
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shift
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;;
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--non-interactive)
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INTERACTIVE=0
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shift
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;;
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-h|--help)
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usage
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exit 0
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;;
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*)
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die "unknown option: $1"
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;;
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esac
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done
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}
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collect_interactive_config() {
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if [ "$VMID_SET" -eq 0 ]; then
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VMID=$(prompt_value "Template VMID" "$VMID")
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fi
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if [ "$NAME_SET" -eq 0 ]; then
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NAME=$(prompt_value "Template name" "$NAME")
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fi
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if [ "$STORAGE_SET" -eq 0 ]; then
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STORAGE=$(prompt_value "Disk storage" "$STORAGE")
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fi
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if [ "$CLOUDINIT_STORAGE_SET" -eq 0 ]; then
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CLOUDINIT_STORAGE=$(prompt_value "Cloud-Init storage" "${CLOUDINIT_STORAGE:-$STORAGE}")
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fi
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if [ "$BRIDGE_SET" -eq 0 ]; then
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BRIDGE=$(prompt_value "Network bridge" "$BRIDGE")
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fi
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if [ "$MEMORY_SET" -eq 0 ]; then
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MEMORY=$(prompt_value "Memory MB" "$MEMORY")
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fi
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if [ "$CORES_SET" -eq 0 ]; then
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CORES=$(prompt_value "vCPU cores" "$CORES")
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fi
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if [ "$CPU_SET" -eq 0 ]; then
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CPU=$(prompt_value "CPU type" "$CPU")
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fi
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if [ "$DISK_SIZE_SET" -eq 0 ]; then
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DISK_SIZE=$(prompt_value "Disk size after resize" "$DISK_SIZE")
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fi
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if [ "$CACHE_DIR_SET" -eq 0 ]; then
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CACHE_DIR=$(prompt_value "Image cache directory" "$CACHE_DIR")
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fi
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if [ "$IMAGE_FILE_SET" -eq 0 ]; then
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IMAGE_FILE=$(prompt_optional_value "Local qcow2 image file")
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fi
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if [ -z "$IMAGE_FILE" ] && [ "$IMAGE_URL_SET" -eq 0 ]; then
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IMAGE_URL=$(prompt_value "Debian GenericCloud image URL" "$IMAGE_URL")
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fi
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if [ "$PBS_STORAGE_SET" -eq 0 ]; then
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PBS_STORAGE=$(prompt_optional_value "PBS storage/datastore ID for backup flag")
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fi
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}
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print_summary() {
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cat <<SUMMARY
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Template configuration:
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VMID: $VMID
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Name: $NAME
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Disk storage: $STORAGE
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Cloud-Init storage: $CLOUDINIT_STORAGE
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Bridge: $BRIDGE
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Memory: $MEMORY MB
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Cores: $CORES
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CPU: $CPU
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Disk size: $DISK_SIZE
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Machine: $MACHINE
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BIOS: $BIOS
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Serial console: serial0 socket, vga serial0
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SUMMARY
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if [ -n "$IMAGE_FILE" ]; then
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printf ' Image file: %s\n' "$IMAGE_FILE"
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else
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printf ' Image URL: %s\n' "$IMAGE_URL"
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printf ' Cache directory: %s\n' "$CACHE_DIR"
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fi
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if [ "$DRY_RUN" -eq 1 ]; then
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printf ' Mode: dry-run\n'
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fi
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if [ -n "$PBS_STORAGE" ]; then
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printf ' Backup flag: enabled for main disk; PBS storage: %s\n' "$PBS_STORAGE"
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else
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printf ' Backup flag: disabled for main disk\n'
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fi
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printf '\n'
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}
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main() {
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parse_args "$@"
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collect_interactive_config
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if [ -z "$CLOUDINIT_STORAGE" ]; then
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CLOUDINIT_STORAGE=$STORAGE
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fi
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print_summary
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if ! prompt_confirm "Create this Proxmox template?"; then
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die "cancelled"
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fi
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if [ "$DRY_RUN" -eq 0 ]; then
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need_command qm
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need_command awk
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fi
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if [ "$(id -u)" -ne 0 ] && [ "$DRY_RUN" -eq 0 ]; then
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die "run this script as root on a Proxmox node"
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fi
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if [ "$DRY_RUN" -eq 0 ] && qm status "$VMID" >/dev/null 2>&1; then
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die "VMID $VMID already exists; choose another --vmid or remove it manually"
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fi
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local image_path
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if [ -n "$IMAGE_FILE" ]; then
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image_path=$IMAGE_FILE
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[ "$DRY_RUN" -eq 1 ] || [ -f "$image_path" ] || die "image file not found: $image_path"
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else
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image_path="$CACHE_DIR/$(basename "$IMAGE_URL")"
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download_image "$IMAGE_URL" "$image_path"
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fi
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run qm create "$VMID" \
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--name "$NAME" \
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--ostype l26 \
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--machine "$MACHINE" \
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--bios "$BIOS" \
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--memory "$MEMORY" \
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--cores "$CORES" \
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--cpu "$CPU" \
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--agent enabled=1 \
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--scsihw "$SCSI_HW" \
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--net0 "$NET_MODEL,bridge=$BRIDGE" \
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--serial0 socket \
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--vga serial0
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if [ "$BIOS" = "ovmf" ]; then
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run qm set "$VMID" --efidisk0 "$STORAGE:0,pre-enrolled-keys=0"
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fi
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run qm importdisk "$VMID" "$image_path" "$STORAGE"
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local imported_disk
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if [ "$DRY_RUN" -eq 1 ]; then
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imported_disk="$STORAGE:vm-$VMID-disk-0"
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log "Dry-run assumption: imported disk will be $imported_disk"
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else
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imported_disk=$(qm config "$VMID" | awk -F': ' '/^unused[0-9]+:/{print $2; exit}')
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[ -n "$imported_disk" ] || die "could not find imported unused disk in qm config for VMID $VMID"
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fi
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local disk_backup=0
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if [ -n "$PBS_STORAGE" ]; then
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disk_backup=1
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fi
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run qm set "$VMID" --scsi0 "$imported_disk,discard=on,ssd=1,backup=$disk_backup"
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run qm set "$VMID" --ide2 "$CLOUDINIT_STORAGE:cloudinit"
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run qm set "$VMID" --boot order=scsi0
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run qm set "$VMID" --ipconfig0 ip=dhcp
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if [ -n "$DISK_SIZE" ]; then
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run qm resize "$VMID" scsi0 "$DISK_SIZE"
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fi
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run qm template "$VMID"
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log "Created Proxmox template $NAME ($VMID)"
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}
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main "$@"
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