disk disk default 32 gb, discard on

cpu enable numa for dual+ socket systems choose skylake-client type, or other option depending on your architecture name

mem balooning on

net bridging with firewall on if migrating, reuse the mac addr of the existing machine. Note that mac's must be distinct on a lan, so you won't be able to have both running at once if you do this.

copy /var/lib/libvirt/image/ qcow2 file to proxmox host (check the timestamp or config to make sure you get the active disk for the vm you are migrating)

to import the disk run: qm importdisk <VMID> <disk>.qcow2 <proxmox storage pool name> This creates a second disk for your target vm.

THERE BE DRAGONS:

• run zfs list to get the name of the existing disk for the new vm
• run zfs destroy <NAME> this is irreversible so be careful
• run zfs rename <disk 2 name> <disk 1 name>
• open etc/pve/local/qemu-server/<disk num.conf> and remove 'unused' line for the 2nd disk

You can now start the new target vm and confirm that the services still function

final steps:

• Update the disk device(s) in fstab to use sd*
• Update the nagios disk check in /etc/nagios/nrpe.cfg to reference the new sd* device