Refactor VM hardware settings and update disk type to SCSI for better compatibility with Proxmox VE 7.4+

debian/13-trixie-luks/debian-trixie.pkr.hcl

@@ -29,13 +29,16 @@ source "proxmox-iso" "debian-13-trixie-luks" {
   cpu_type           = "${var.template_cpu_type}"
   cores              = 2
   memory             = 2048
+  ballooning_minimum = 2048
   bios               = "ovmf"
-  scsi_controller = "virtio-scsi-pci"
+  scsi_controller    = "virtio-scsi-single"
   disks {
     disk_size    = "30G"
     format       = "qcow2"
     storage_pool = "${var.disk_storage_pool}"
-    type         = "virtio"
+    type         = "scsi" # VirtIO-SCSI better maintained as virtio-blk has been deprecated in Proxmox VE 7.4+ and may cause issues with newer Linux kernels
+    io_thread    = true
+    ssd          = true
   }
 
   efi_config {
@@ -63,7 +66,7 @@ source "proxmox-iso" "debian-13-trixie-luks" {
     model       = "virtio"
     mac_address = "${var.mac_address}"
     bridge      = "${var.network_bridge}"
-    firewall    = "false"
+    firewall    = "true"
   }
 
   # VM Cloud-Init Settings
@@ -72,7 +75,7 @@ source "proxmox-iso" "debian-13-trixie-luks" {
   cloud_init_disk_type    = "scsi"
 
   # PACKER Boot Commands
-  boot         = "order=virtio0;scsi0"
+  boot         = "order=scsi0;scsi1"
   boot_wait    = "10s"
   communicator = "ssh"
   boot_command = [