Instructions
Choose your Ubuntu Cloud Image. Here in this example will use ubuntu cloud-init image. Download Ubuntu (replace with the url of the one you chose from above)
wget https://cloud-images.ubuntu.com/focal/current/focal-server-cloudimg-amd64.img
Create a new virtual machine
qm create 8000 --memory 2048 --core 2 --name ubuntu-cloud --net0 virtio,bridge=vmbr0
Import the downloaded Ubuntu disk to local-lvm storage
qm importdisk 8000 focal-server-cloudimg-amd64.img local-lvm
Attach the new disk to the vm as a scsi drive on the scsi controller
qm set 8000 --scsihw virtio-scsi-pci --scsi0 local-lvm:vm-8000-disk-0
Add cloud init drive
qm set 8000 --ide2 local-lvm:cloudinit
Make the cloud init drive bootable and restrict BIOS to boot from disk only
qm set 8000 --boot c --bootdisk scsi0
Add serial console
qm set 8000 --serial0 socket --vga serial0
DO NOT START YOUR VM
Now, configure hardware and cloud init, then create a template and clone. If you want to expand your hard drive you can on this base image before creating a template or after you clone a new machine. I prefer to expand the hard drive after I clone a new machine based on need.
Create template.
qm template 8000
Clone template.
qm clone 8000 135 --name yoshi --full
Troubleshooting
If you need to reset your machine-id
sudo rm -f /etc/machine-id sudo rm -f /var/lib/dbus/machine-id
Then shut it down and do not boot it up. A new id will be generated the next time it boots. If it does not you can run:
sudo systemd-machine-id-setup
Ref:
https://docs.technotim.live/posts/cloud-init-cloud-image/
https://blog.stefandroid.com/2021/07/02/proxmox-debian-cloud-init-template.html
