This script will download a cloud image and deploy it as a template in Proxmox VE

deploy-linux-template-proxmox.sh

#!/bin/bash

# This script will download a cloud image and deploy it as a template in Proxmox VE
# Tested on Proxmox VE 8.4.1
clear

# Default values for cloud template
MEMORY="512"
DISK_SIZE="5G"
STORAGE="local-lvm"
NET_IFACE="vmbr0"

# Menu to select cloud template to deploy
printf "Select an image linux to deploy how a cloud template in Proxmox:\n"
PS3="Select an option [1-11]: "
OPTIONS=("Ubuntu Server Minimal 24.04 LTS" "Ubuntu Server Minimal 25.04" "Debian 12" "CentOS Stream 9" "CentOS Stream 10" "Fedora Server 42" "Arch Linux 2025.06.01" "OpenSUSE Leap Micro 6.1" "Alpine Linux 3.22.0" "Flatcar 4152.2.3" "Quit")
select opt in "${OPTIONS[@]}"; do
  case "${opt}" in
  "Ubuntu Server Minimal 24.04 LTS")
    printf "\nYou selected Ubuntu Server Minimal 24.04 LTS\n"
    printf "Downloading cloud image...\n"
    # https://cloud-images.ubuntu.com/minimal/releases/noble/release/SHA256SUMS
    IMAGE="https://cloud-images.ubuntu.com/minimal/releases/noble/release/ubuntu-24.04-minimal-cloudimg-amd64.img"
    DST="ubuntu-24.04-minimal-cloudimg-amd64.img"
    ID_VM=9000
    VM_NAME="ubuntu-server-24.04"
    break
    ;;
  "Ubuntu Server Minimal 25.04")
    printf "\nYou selected Ubuntu Server Minimal 25.04\n"
    printf "Downloading cloud image...\n"
    # https://cloud-images.ubuntu.com/minimal/releases/plucky/release/SHA256SUMS
    IMAGE="https://cloud-images.ubuntu.com/minimal/releases/plucky/release/ubuntu-25.04-minimal-cloudimg-amd64.img"
    DST="ubuntu-25.04-minimal-cloudimg-amd64.img"
    ID_VM=9001
    VM_NAME="ubuntu-server-25.04"
    break
    ;;
  "Debian 12")
    printf "\nYou selected Debian 12\n"
    printf "Downloading cloud image...\n"
    # https://cloud.debian.org/images/cloud/bookworm/latest/SHA512SUMS
    IMAGE="https://cloud.debian.org/images/cloud/bookworm/latest/debian-12-nocloud-amd64.qcow2"
    DST="debian-12-nocloud-amd64.qcow2"
    ID_VM=9002
    VM_NAME="debian-12"
    break
    ;;
  "CentOS Stream 9")
    printf "\nYou selected CentOS Stream 9\n"
    printf "Downloading cloud image...\n"
    # https://cloud.centos.org/centos/9-stream/x86_64/images/CentOS-Stream-GenericCloud-9-latest.x86_64.qcow2.SHA256SUM
    IMAGE="https://cloud.centos.org/centos/9-stream/x86_64/images/CentOS-Stream-GenericCloud-9-latest.x86_64.qcow2"
    DST="CentOS-Stream-GenericCloud-9-latest.x86_64.qcow2"
    ID_VM=9003
    VM_NAME="centos-Stream-9"
    break
    ;;
  "CentOS Stream 10")
    printf "\nYou selected CentOS Stream 10\n"
    printf "Downloading cloud image...\n"
    # https://cloud.centos.org/centos/10-stream/x86_64/images/CentOS-Stream-GenericCloud-10-latest.x86_64.qcow2.SHA256SUM
    IMAGE="https://cloud.centos.org/centos/10-stream/x86_64/images/CentOS-Stream-GenericCloud-10-latest.x86_64.qcow2"
    DST="CentOS-Stream-GenericCloud-10-latest.x86_64.qcow2"
    ID_VM=9004
    VM_NAME="centos-Stream-10"
    break
    ;;
  "Fedora Server 42")
    printf "\nYou selected Fedora Server 42\n"
    printf "Downloading cloud image...\n"
    # https://download.fedoraproject.org/pub/fedora/linux/releases/42/Cloud/x86_64/images/Fedora-Cloud-42-1.1-x86_64-CHECKSUM
    IMAGE="https://download.fedoraproject.org/pub/fedora/linux/releases/42/Cloud/x86_64/images/Fedora-Cloud-Base-Generic-42-1.1.x86_64.qcow2"
    DST="Fedora-Cloud-Base-Generic.x86_64-42-1.1.qcow2"
    ID_VM=9005
    VM_NAME="fedora-server-42"
    break
    ;;
  "Arch Linux 2025.06.01")
    printf "\nYou selected Arch Linux 2025.06.01\n"
    printf "Downloading cloud image...\n"
    # https://geo.mirror.pkgbuild.com/images/latest/Arch-Linux-x86_64-cloudimg.qcow2.SHA256
    IMAGE="https://geo.mirror.pkgbuild.com/images/latest/Arch-Linux-x86_64-cloudimg.qcow2"
    DST="Arch-Linux-x86_64-cloudimg.qcow2"
    ID_VM=9006
    VM_NAME="arch-linux-2025.06.01"
    break
    ;;
  "OpenSUSE Leap Micro 6.1")
    printf "\nYou selected OpenSUSE Leap Micro 6.1\n"
    printf "Downloading cloud image...\n"
    # https://download.opensuse.org/distribution/leap-micro/6.1/appliances/openSUSE-Leap-Micro.x86_64-Default-qcow.qcow2.sha256
    IMAGE="https://download.opensuse.org/distribution/leap-micro/6.1/appliances/openSUSE-Leap-Micro.x86_64-Default-qcow.qcow2"
    DST="openSUSE-Leap-Micro.x86_64-Default-qcow.qcow2"
    ID_VM=9007
    VM_NAME="opensuse-leap-micro-6.1"
    break
    ;;
  "Alpine Linux 3.22.0")
    printf "\nYou selected Alpine Linux 3.22.0\n"
    printf "Downloading cloud image...\n"
    # https://dl-cdn.alpinelinux.org/alpine/v3.22/releases/cloud/nocloud_alpine-3.22.0-x86_64-bios-cloudinit-r0.asc
    IMAGE="https://dl-cdn.alpinelinux.org/alpine/v3.22/releases/cloud/nocloud_alpine-3.22.0-x86_64-bios-cloudinit-r0.qcow2"
    DST="nocloud_alpine-3.22.0-x86_64-bios-cloudinit-r0.qcow2"
    ID_VM=9008
    VM_NAME="alpine-linux-3.22.0"
    break
    ;;
  "Flatcar 4152.2.3")
    printf "\nYou selected Flatcar 4152.2.3\n"
    printf "Downloading cloud image...\n"
    # https://stable.release.flatcar-linux.net/amd64-usr/current/flatcar_production_qemu_image.img.DIGESTS
    IMAGE="https://stable.release.flatcar-linux.net/amd64-usr/current/flatcar_production_qemu_image.img"
    DST="flatcar_production_qemu_image.img"
    ID_VM=9009
    VM_NAME="flatcar-4152.2.3"
    break
    ;;
  "Quit")
    exit 0
    ;;
  *)
    printf "\nInvalid option, try again.\n"
    ;;
  esac
done

# Download image
wget -O "${DST}" "${IMAGE}"
printf "Uploading cloud image to Proxmox...\n"

# Create a VM with the cloud image and convert to template
qm create "${ID_VM}" --name "${VM_NAME}" --memory "${MEMORY}" --net0 virtio,bridge="${NET_IFACE}" --scsihw virtio-scsi-pci
# Set agent and cpu parameters
qm set "${ID_VM}" --agent enabled=1,fstrim_cloned_disks=1 --cpu cputype=host
# Import cloud image to VM
qm set "${ID_VM}" --scsi0 "${STORAGE}":0,import-from="${PWD}"/"${DST}"
# Set cloud-init parameters
qm set "${ID_VM}" --ide2 "${STORAGE}":cloudinit
qm set "${ID_VM}" --boot order=scsi0
qm set "${ID_VM}" --serial0 socket --vga serial0
# Set network parameters
qm set "${ID_VM}" --ipconfig0 ip=dhcp
# Set disk size
qm disk resize "${ID_VM}" scsi0 "${DISK_SIZE}"
printf "Creating cloud template in Proxmox...\n"

# Convert VM to template
qm template "${ID_VM}"
printf "Cleaning up...\n"

# Remove downloaded image
rm -Rf "${DST}"
printf "Done!\n"

# Then you can create a VM from this templates with terraform and cloud-init
############
# Reference:
# https://pve.proxmox.com/wiki/Cloud-Init_Support
# https://pve.proxmox.com/pve-docs/chapter-qm.html#qm_cloud_init
# https://cloud-images.ubuntu.com/minimal/releases/
# https://cloud.debian.org/images/cloud/
# https://cloud.centos.org/centos/
# https://download.fedoraproject.org/pub/fedora/linux/releases/
# https://geo.mirror.pkgbuild.com/images/latest/
# https://download.opensuse.org/distribution/
# https://dl-cdn.alpinelinux.org/alpine/
# https://stable.release.flatcar-linux.net/amd64-usr/current/