Tftpboot

Tftpboot setting to boot diskless VME controllers

Create file /tftpboot/efi/boot/grub2/grub.cfg with following contents:

function load_video {
insmod efi_gop
insmod efi_uga
insmod video_bochs
insmod video_cirrus
insmod all_video
}

load_video
set gfxpayload=keep
insmod gzio
set timeout=2
menuentry 'Diskless CentOS7 x86_64, any network device'  --class redhat --class gnu-linux --class gnu --class os {
linuxefi linux-install/CentOS7-x86_64-Diskless/vmlinuz-3.10.0-1062.9.1.el7.x86_64 zram=1 ip=::::::dhcp root=nfs:192.168.10.1:/diskless/CentOS7-devel/x86_64/root ro vga=0x305 module_blacklist=ipmi_si,ipmi_msghandler,ipmi_devintf,w83977f_wdt
initrdefi linux-install/CentOS7-x86_64-Diskless/initramfs-jvme-3.10.0-1062.9.1.el7.x86_64.img
}

Edit file /etc/dhcp/dhcpd.conf:

subnet 192.168.10.0 netmask 255.255.255.0 {
       option domain-name "jlab.org";
       option domain-name-servers 129.57.32.100, 129.57.32.101;
       option routers 192.168.10.1;
       use-host-decl-names true;
	pool {
	     range 192.168.10.2 192.168.10.20;
	     deny dynamic bootp clients;
	     allow unknown clients;
	     }
}

set vendorclass = option vendor-class-identifier;
option pxe-system-type code 93 = unsigned integer 16;
set pxetype = option pxe-system-type;

# DISKLESS Clients in here
group
{
	if substring(vendorclass, 0, 9)="PXEClient" {
	   if pxetype=00:06 or pxetype=00:07 {
	      filename   "efi/boot/grub2/x86_64-efi/core.efi";
	   } else {
	      filename "linux-install/pxelinux.0";
	   }
	}
  	next-server 192.168.10.1;
	host test1 {
	 hardware ethernet 00:20:38:03:10:34;
	 fixed-address 192.168.10.4;
	}
	host test4 {
	 hardware ethernet 00:20:38:10:14:f7;
	 fixed-address 192.168.10.5;
	}
} # Diskless clients group