fix: repo rewrites are necessary anyway

.shellcheckrc

@@ -0,0 +1 @@
+external-sources=true

provisioners/update.sh

@@ -0,0 +1,18 @@
+#!/bin/bash
+set -euxo pipefail
+
+# configure apt for non-interactive mode.
+export DEBIAN_FRONTEND=noninteractive
+
+# switch to the non-enterprise repository.
+# see https://pve.proxmox.com/wiki/Package_Repositories
+dpkg-divert --divert /etc/apt/sources.list.d/pve-enterprise.list.distrib.disabled --rename --add /etc/apt/sources.list.d/pve-enterprise.list
+dpkg-divert --divert /etc/apt/sources.list.d/ceph.list.distrib.disabled --rename --add /etc/apt/sources.list.d/ceph.list
+echo "deb http://download.proxmox.com/debian/pve $(. /etc/os-release && echo "$VERSION_CODENAME") pve-no-subscription" >/etc/apt/sources.list.d/pve.list
+echo "deb http://download.proxmox.com/debian/ceph-reef $(. /etc/os-release && echo "$VERSION_CODENAME") no-subscription" >/etc/apt/sources.list.d/ceph.list
+
+# switch the apt mirror from us to nl.
+sed -i -E 's,ftp\.us\.debian,ftp.nl.debian,' /etc/apt/sources.list
+
+# update only (no upgrade since we want to use this image to test automated cluster upgrades)
+apt-get update

proxmox-ve.pkr.hcl

@@ -72,6 +72,7 @@ variable "shell_provisioner_scripts" {
   default = [
     "provisioners/apt_proxy.sh",
     "provisioners/network.sh",
+    "provisioners/update.sh",
     "provisioners/localisation-ch.sh",
     "provisioners/reboot.sh",
     "provisioners/provision.sh",