Some basic virtualization with kvm.
A host has a lvs disk and a swap.
Boot with direct kernel boot as
<os>
<type arch='x86_64' machine='pc-q35-3.1'>hvm</type>
<kernel>/var/lib/libvirt/images/vmlinuz-5.10.0-16-cloud-amd64</kernel>
<initrd>/var/lib/libvirt/images/initrd.img-5.10.0-16-cloud-amd64</initrd>
<cmdline>root=/dev/vda nohibernate noresume</cmdline>
<boot dev='hd'/>
</os>
Edit create-host
ad exec.
Edit lvs-mirror
to mirror lvs disk to remote host
and exec.