Create a VM template from the latest Debian release with settings appropriate for the Lokschuppen/Jachthafen Proxmox cluster

Prerequisites

The script uses the package libguestfs-tools' virt-builder to download and customize a Debian image, and then add it as a template to Proxmox.

Building the Template

Configuration Options

Verify that the settings at the beginning of the script are suitable to the cluster you want to create the template from.

Variable	Default	Description
VMID	9023	ID the template should have in Proxmox
STORAGE	local-zfs	Pool the disks should be created in
OS	debian-12	virt-builder name of the OS to install
NAME	eisenboot-${OS}-tmpl-$(date -u +%Y-%m-%d)	name of the template
BRIDGE	vmbr125	name of the bridge to use and any parameters needed, like the VLAN tag

User Account, sshd, and authorized_keys

cloud-init will create a user eisenboot, by default with a locked password, and authorized keys initialized. Password-less sudo is configured, so you can run commands as root.

authorized_keys is maintained in this directory.

Run the Script

sudo ./build-proxmox-template

Cloning the Template

Please use "Full Clone" when creating a VM based on this template. Using Linked Clone means that the template's disk cannot be recreated since the linked clones need it. This means that the script cannot update the template.

Disk Size

The installed cloud-guest-utils will automatically increase the root filesystem when you increase the size of the root disk. You will need to reboot the VM for the resize to take place. You can increase the size of the disk right after cloning and before starting the VM for the first time.

Root Password

The root account is disabled. Use the eisenboot account.