Proxmox VE shell commands to create Debian 13 cloud-init ready VM template and deploy a VM from the template with cloud-init settings

pve-deb13-cloudimage.sh

# Proxmox VE shell commands to create Debian 13 cloud-init ready VM template and
# deploy a VM from the template with cloud-init settings
# 
# Tested on Proxmox VE 8.4.14 and 9.0.11
# Run the commands on the Proxmox VE host as root
# Note: This is not a shell script ready to be run, it's just a list of commands
#
# https://github.com/alatalo
#

# create working directory
mkdir -p /root/debian-cloudinit
cd /root/debian-cloudinit

# install required tooling
apt install libguestfs-tools -y

# get the debian 13 generic cloud image from https://cloud.debian.org/images/cloud/
wget https://cloud.debian.org/images/cloud/trixie/latest/debian-13-genericcloud-amd64.qcow2

# or alternatively, get the generic image
#wget https://cloud.debian.org/images/cloud/trixie/latest/debian-13-generic-amd64.qcow2

# make a copy of the image for keepsake purposes
mkdir -p ./iso
cp debian-13-genericcloud-amd64.qcow2 ./iso

# pre-install selected packages
virt-customize -a debian-13-genericcloud-amd64.qcow2 --install qemu-guest-agent,nano,htop,tmux,curl,wget

# reset machine id to avoid duplicates in clones
virt-customize -a debian-13-genericcloud-amd64.qcow2 --truncate /etc/machine-id

# shrink the image to save space
qemu-img convert -O qcow2 -c -o preallocation=off debian-13-genericcloud-amd64.qcow2 debian-13-genericcloud-amd64-shrink.qcow2

# get image infos to see the difference
qemu-img info debian-13-genericcloud-amd64.qcow2
qemu-img info debian-13-genericcloud-amd64-shrink.qcow2

# ---------------------------------
# create a vm template
#
# here we create a template vmid 9100 named Debian13-cloudinit-ready with
# 1 cpu core, 1GB memory and Start at boot + Qemu guest agent enabled
#
# replace 9100 with your desired template vmid
# replace "local-lvm" with your storage name (local-lvm, local-zfs, nfs-storage, etc)
# ---------------------------------
qm create 9100 --name "Debian13-cloudinit-template" --cores 1 --memory 1024 --net0 virtio,bridge=vmbr0
qm importdisk 9100 debian-13-genericcloud-amd64-shrink.qcow2 local-lvm
qm set 9100 --description "Debian 13 cloud-init ready template"
qm set 9100 --ostype l26
qm set 9100 --scsihw virtio-scsi-pci --scsi0 local-lvm:vm-9100-disk-0,ssd=1
qm set 9100 --boot c --bootdisk scsi0
qm set 9100 --ide2 local-lvm:cloudinit
qm set 9100 --agent enabled=1
qm set 9100 --onboot 1
qm template 9100

# ---------------------------------
# deploy a vm using the template
#
# here we create vmid 601 named deb13-foo, with 8GB extra disk,
# dhcp ip, cloud-init user + password and ssh key
#
# you can also create vm from the gui using the template (clone > full) and configure
# cloud-init options there
# ---------------------------------
qm clone 9100 601 --name deb13-foo --full
qm resize 601 scsi0 +8G
qm set 601 --ipconfig0 ip=dhcp
#qm set 601 --ciuser pveadmin --cipassword hunter2
# if you omit user/pass, then user: debian, sshkey:
qm set 601 --sshkey <(echo "ssh-ed25519 AAAAf00b4r")
qm start 601

# adjust memory and cpu
#qm set 601 --memory 4096 --cores 4

# use static ip assignment
#qm set 601 --ipconfig0 ip=10.0.10.58/24,gw=10.0.10.1

# use tagged vlan 40 nic
#qm set 601 -net0 "virtio,bridge=vmbr0,tag=40"

# use serial console
#qm set 601 --serial0 socket --vga serial0

# add vm to high availability (ha) cluster
ha-manager add 601 --max_restart 1 --max_relocate 1