Pigeon/vmconfig.nix

{
  writeText,
  pigeon-kernel,
  pigeon-rootfs,
  pigeon-vcpu-count ? 1,
  pigeon-memory-size-mb ? 512
}:

writeText "pigeon-vm.json" (builtins.toJSON {
  boot-source = {
    kernel_image_path = "${pigeon-kernel}";
    boot_args = "reboot=k panic=1 quiet init=/init nomodule 8250.nr_uarts=0 i8042.noaux i8042.nomux i8042.dumbkbd swiotlb=noforce";
  };
  drives = [
    {
      drive_id = "rootfs";
      path_on_host = "${pigeon-rootfs}";
      is_root_device = true;
      is_read_only = true;
    }
    {
      drive_id = "student";
      path_on_host = "";
      is_root_device = false;
      is_read_only = true;
    }
    {
      drive_id = "grader";
      path_on_host = "";
      is_root_device = false;
      is_read_only = true;
    }
    {
      drive_id = "results";
      path_on_host = "";
      is_root_device = false;
      is_read_only = false;
    }
  ];
  machine-config = {
    vcpu_count = pigeon-vcpu-count;
    mem_size_mib = pigeon-memory-size-mb;
  };
})