os/scripts/grub.cfg

set default="0"
set timeout=10

set gfxmode=auto
insmod efi_gop
insmod efi_uga


menuentry "Rancher" {
        set gfxpayload=keep
        linux   /boot/vmlinuz  quiet rancher.password=rancher rancher.state.autoformat=[/dev/sda,/dev/vda]
        initrd  /boot/initrd
}