I am having trouble with a bearmetal install of CoreOS with raid0 and raid1 arrays. I decided to try out the config in a virtual machine.

So first I created 3 harddisk drives

  qemu-img create temp/coreos_disk1.img 10g
  qemu-img create temp/coreos_disk2.img 10g
  qemu-img create temp/coreos_disk3.img 10g

This started the virtual machine with the drives attached and .iso file in the cdrom, like so:

  qemu-system-x86_64 -m 512  -boot d -cdrom Downloads/fedora-coreos-35.20220103.3.0-live.x86_64.iso  \
    -hda temp/coreos_disk1.img -hdb temp/coreos_disk2.img \
    -hdd temp/coreos_disk3.img \

The VM booted off the iso and I could see from ls -al /dev/disks/by-id the ID of disks. Knowing the ID of disks I was able to adjust a butane config, make available via local http server, and install with:

  coreos-install install /dev/sda --ignition-url --insecure-ignition

Once installed a ran poweroff and started virtual machine again.. this time booting from hdd and doing a local port forward for ssh access

 qemu-system-x86_64 -m 512 -boot c \
   -hda temp/coreos_disk1.img \
   -hdb temp/coreos_disk2.img \
   -hdd temp/coreos_disk3.img \
   -enable-kvm \
   -device e1000,netdev=net0 -netdev user,id=net0,hostfwd=tcp::5555-:22