Tftpboot

Tftpboot setting to boot diskless VME controllers

If /tftpboot directory does not exist yet, copy it from /usr/downloads (it come from Bryan Moffit in April 2025).

File /tftpboot/efi/boot/grub2/grub.cfg should have 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/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
}

that file will serve all EFI-bootable VME controllers.

In directory /tftpboot/pxelinux.cfg, PXE-bootable controllers boot files are stored. For example:

C0A80A06 -> test6
test6

where C0A80A06 is test6's IP address in hex format (192.168.10.6), and test6 has following contents:

default CentOS7

label CentOS7
    kernel CentOS7-x86_64-Diskless/vmlinuz-3.10.0-1062.9.1.el7.x86_64
    append initrd=CentOS7-x86_64-Diskless/initramfs-jvme-3.10.0-1062.9.1.el7.x86_64.img ip=bootdev:dhcp root=nfs:192.168.10.1:/diskless/CentOS7/x86_64/root,tcp ro ifname=bootdev:00:20:38:0A:07:D7