@george1421

YES!
Here you go.
Let me know what else you need.
https://drive.google.com/drive/folders/1UqKsUVnkOIlsva54WOhpDAu4-1OTABe0

@chris_unit As long as it is default NO. Otherwise you have to change it to bzimage and bzimage32 in fog system settings TFTP Server

@chris_unit I just went into my FOG Gui, clicked Fog Config->Kernel Update->Kernel 5.10.50 Tom Elliot 64(Third One I think) and then I clicked Download on the right. It installed. I rebooted for good measure and all worked.

@george1421
FOR SURE your way works PERFECTLY.
I forgot I cannot use $ inside grub.cfg for any variables…
SO you got it working for me.
I APPRECIATE you very much. Let me know any specifics of how I can contribute in return.
I will work on a “Load XenServer from Scratch using FOG” write up at a minimum.

PROBLEM SOLVED after I took out my variables and used your Copy and Paste VI etc.

THANK YOU!

@george1421
WOW - Thats great. I am getting the Boot to Fog Menu, then Selecting the new item with the chain, it starts the boot flashes REAL Fast “syntax error” then kicks to grub> prompt. So I am sure I missed a step…I even dos2unix 'ed the grub.cfg file.
Anyhow, I am guessing its all on my end now. I appreciate it very much. IF I get this working I will do a write up on what I am doing to help others. I did start with trying to get the http working but swapped to direct TFTP and followed your instructions. So I will grab another beverage and start again to see if I can make your magic work.

@george1421
Yes if you just burn the files I provided to USB, and install on a system that is EFI / UEFI only it will pull
/EFI/xenserver/grubx64.efi then /boot/vmlinuz then /install.img

I THINK the magic file is grubx65.efi OR /boot/efiboot.img that it pulls…

So by the system being in UEFI boot Only mode it will boot and load from that same USB…
In otherwords the files I provided burned to USB with rufus etc will boot EFI USB…

According to Citrix Xenserver people they insist the TFTP boot magic for UEFI boot is Here:
https://support.citrix.com/article/CTX217680 But I cannot get it to go with Fog…
I set my DHCP to provide grubx64.efi and can get a Grub menu from FOG but think I am barking up the wrong tree.

I placed a USB Image file ready to UEFI Boot in the same Shared Google Folder as before to try to make it easier.
“UEFIUSBINSTALLER.IMG”
I appreciate the effort.

@george1421

YES!
Here you go.
Let me know what else you need.
https://drive.google.com/drive/folders/1UqKsUVnkOIlsva54WOhpDAu4-1OTABe0

@george1421
Yes everything boots…I get the Fog Menu in EFI mode and I have the DHCP set such that it detects Bios-Legacy or EFI boot.
I can use Fog to EFI Load machines all day long.
As you indicated I can boot this XenServer and Load it via FOG in Legacy mode PERFECT, and its awesome using the http protocol of the version you suggested.

However if I switch to EFI boot, and use the same menu, I get IPXE Exec format error.
“http://fogiphere/boot/xen.gz …Ok”
“Could not select: Exec format error (http://ipxe.org/2e008081)”
See Pic.

@dangbird

Here is the USB version “grub-usb.cfg”

set default="0"

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
insmod part_gpt
insmod ext2

set timeout=5
search --file --set /install.img

menuentry "install" {
    multiboot2 /boot/xen.gz dom0_max_vcpus=1-16 dom0_mem=max:8192M com1=115200,8n1 console=com1,vga
    module2 /boot/vmlinuz xencons=hvc console=hvc0 console=tty0
    module2 /install.img
}

menuentry "no-serial" {
    multiboot2 /boot/xen.gz dom0_max_vcpus=1-16 dom0_mem=max:8192M console=vga
    module2 /boot/vmlinuz console=tty0
    module2 /install.img
}

menuentry "safe" {
    multiboot2 /boot/xen.gz dom0_max_vcpus=1-16 dom0_mem=max:8192M nosmp noreboot noirqbalance no-mce no-bootscrub no-numa no-hap no-mmcfg iommu=off max_cstate=0 nmi=ignore allow_unsafe com1=115200,8n1 console=com1,vga vga=keep
    module2 /boot/vmlinuz xencons=hvc console=hvc0 console=tty0
    module2 /install.img
}

menuentry "multipath" {
    multiboot2 /boot/xen.gz dom0_max_vcpus=1-16 dom0_mem=max:8192M com1=115200,8n1 console=com1,vga
    module2 /boot/vmlinuz xencons=hvc console=hvc0 console=tty0 device_mapper_multipath=enabled
    module2 /install.img
}

menuentry "shell" {
    multiboot2 /boot/xen.gz dom0_max_vcpus=1-16 dom0_mem=max:8192M com1=115200,8n1 console=com1,vga
    module2 /boot/vmlinuz xencons=hvc console=hvc0 console=tty0 bash-shell
    module2 /install.img
}

@george1421

Sorry about the delay, email notification did not hit me.
the Nonsensical entry is a clear display of my ignorance on the boot site of linux.

I found TWO grub configs, both under the EFI folder.
Here is “grub.cfg” - I will Post the Second Grub as an additional reply for clarity.

set default="0"

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
insmod part_gpt
insmod ext2

set timeout=5

menuentry "install" {
    multiboot2 /boot/xen.gz dom0_max_vcpus=1-16 dom0_mem=max:8192M com1=115200,8n1 console=com1,vga
    module2 /boot/vmlinuz xencons=hvc console=hvc0 console=tty0
    module2 /install.img
}

menuentry "no-serial" {
    multiboot2 /boot/xen.gz dom0_max_vcpus=1-16 dom0_mem=max:8192M console=vga
    module2 /boot/vmlinuz console=tty0
    module2 /install.img
}

menuentry "safe" {
    multiboot2 /boot/xen.gz dom0_max_vcpus=1-16 dom0_mem=max:8192M nosmp noreboot noirqbalance no-mce no-bootscrub no-numa no-hap no-mmcfg iommu=off max_cstate=0 nmi=ignore allow_unsafe com1=115200,8n1 console=com1,vga vga=keep
    module2 /boot/vmlinuz xencons=hvc console=hvc0 console=tty0
    module2 /install.img
}

menuentry "multipath" {
    multiboot2 /boot/xen.gz dom0_max_vcpus=1-16 dom0_mem=max:8192M com1=115200,8n1 console=com1,vga
    module2 /boot/vmlinuz xencons=hvc console=hvc0 console=tty0 device_mapper_multipath=enabled
    module2 /install.img
}

menuentry "shell" {
    multiboot2 /boot/xen.gz dom0_max_vcpus=1-16 dom0_mem=max:8192M com1=115200,8n1 console=com1,vga
    module2 /boot/vmlinuz xencons=hvc console=hvc0 console=tty0 bash-shell
    module2 /install.img
}

Hello All - Was wondering if someone can get me over the hill and get the Cigar lit.
Happy to share any files needed.
We use XenServer as a Hypervisor and deploy many servers each week. Bios mode works AMAZING with Fog.
Here is the Menu Entry we use where we call a Script with an Answer file to load over the network:

kernel http://${fog-ip}/iso/xen82/boot/xen dom0_max_vcpus=4 dom0_mem=1024M,max:1024M com1=115200,8n1 console=com1,vga
module http://${fog-ip}/iso/xen82/boot/vmlinuz xencons=hvc console=hvc0 console=tty0 answerfile=http://${fog-ip}/iso/xen82/scripts/answerfile-82 install
module http://${fog-ip}/iso/xen82/install.img
boot

I based the above off of the post here:
https://ipxe.org/appnote/xenserver

The new hardware we are receiving has NVMe drives and will only work with UEFI Loaded XenServer. From what I can tell the XenServer Uses grub64.efi as per this post under “Configuring your Server for TFTP Boot UEFI” https://docs.citrix.com/en-us/xenserver/7-1/install/network-boot.html

That said I have the DHCP Setup and working great, and Fog boots right into UEFI Menu, but I cannot figure out the correct Grub/Install file to use in the correct format due to my pure ignorance.

So, Anyone that has a suggestion I can try I would appreciate it much!