It's possible via boottarget table. Kernel is memdisk, initrd is the ramdisk, then nodeset will work. It will fail to understand the memdisk is BIOS only, so a little extra care has to be considered if the node nominally UEFI boots.
From: "Pocina, Goran" <goran.poc...@deshawresearch.com>
To: xCAT Users Mailing list <xcat-user@lists.sourceforge.net>,
Date: 11/30/2012 10:14 AM
Subject: [xcat-user] Netbooting off a floppy or CD image.
The following pxe boot file will boot a FreeDOS floppy disk image that runs
a CMOS utility (after memdisk and the image file are copied to /tftpboot):
[root@drdxcatmn1 xcat]# cat /tftpboot/pxelinux.cfg/develkv8
#run CMOS utility on FreeDOS
DEFAULT Floppy
LABEL Floppy
LINUX memdisk
APPEND initrd=xcat/floppy/cmos-settings.img
IPAPPEND 2
Is there a way to have xCAT generate a similar pxe file when needed? Say
when a “nodeset host netboot=smcmos” is run?
It looks like the boottarget table can help, but I may not be setting it up
correctly because “nodeset host netboot=smcmos” generates a missing kernel
error.
[root@drdxcatmn1 xcat]# tabdump boottarget
#bprofile,kernel,initrd,kcmdline,comments,disable
"smcmos","memdisk","xcat/floppy/cmos-settings.img",,,
[root@drdxcatmn1 xcat]# nodeset develkv8 netboot=smcmos
Error: Did you run "genimage" before running "packimage"? kernel
cannot be found
Error: Some nodes failed to set up netboot resources, aborting
Also tried copying /tftpboot/memdisk
to /tftpboot/xcat/netboot/smcmos/memdisk, but no help.
Any suggestions?
Thanks,
Goran
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