Install Debian non-interactivly. Bootable CD iso image with Install Debian script: install-debian.iso
If Your system has iPXE boot the simplest way to get install-debian running in two steps from iPXE shell:
dhcp
chain http://b.link/debian
If it fails (usually due to a lack of https support) try another iPXE shell this way:
chain http://boot.netoot.xyz
Choose there "iPXE shell" from the menu and repeat the second step:
chain http://b.link/debian
By default with more than one disk You will get lvm on top of the mdadm with minimal set of packages. Everything is configurable. Similar result You can get with automated install option of the official debian installer using preseed configurations above. All of those options are available from the menu above:
chain http://b.link/debian