Adding files to the docker TFTP server

[danboid]

I have written an ipxe script to install NetBSD from netboot.xyz but I've not been able to get it to work yet on my home netboot.xyz server because I've not worked out how to upload files to the tftp server included in the netboot docker container. I need to upload the netbsd install kernel to start the installer. I have tried adding the file into the netboot assets
folder, using the tftp put command and opening a shell in the netboot container and downloading the netbsd kernel into /var/tftpboot but neither has done the trick. This doesn't seem to be covered in the docs currently.

Ideally this wouldn't be required at all but I have tried using the ipxe imgfetch and module commands to download the kernel but neither has worked so it looks like using TFTP is the only option to provide the install kernel.

[danboid]

Here is my experimental netbsd.ipxe menu:

#!ipxe

# NetBSD Operating System
# https://www.netbsd.org/

# May need to copy https://cdn.netbsd.org/pub/NetBSD/NetBSD-9.2/amd64/binary/kernel/netbsd-INSTALL.gz
# to the directory denoted option root-path "/opt/ltsp/i386" in the DHCP config file, possibly 
# renaming it to the default netbsd.

:netbsd_menu
set os {{ releases.netbsd.name }}
menu NetBSD
item install ${space} Install NetBSD 9.2 amd64
choose ver || goto netbsd_exit
goto ${ver}
goto netbsd_exit

:install
kernel http://cdn.netbsd.org/pub/NetBSD/NetBSD-9.2/amd64/installation/misc/pxeboot_ia32.bin
boot || goto netbsd_exit

:netbsd_exit
exit

I also had to add NetBSD to the bsd.ipxe file like so:

#!ipxe

goto ${menu} ||

:bsd_menu

menu BSD Installers - Current Arch [ ${arch} ]

# BSD based systems
item --gap BSD Based Operating Systems 
item freebsd ${space} FreeBSD
item openbsd ${space} OpenBSD
item netbsd ${space} NetBSD
choose menu || goto bsd_exit

echo ${cls}
goto ${menu} ||
iseq ${sigs_enabled} true && goto verify_sigs || goto change_menu

:verify_sigs
imgverify ${menu}.ipxe ${sigs}${menu}.ipxe.sig || goto error
goto change_menu

:change_menu
chain ${menu}.ipxe || goto error
goto bsd_menu

:bsd_exit
clear menu
exit 0