[syslinux] memdisk issue with gpxelinux.0

[Miller, Shao]

Please don't get me started on that particular product...!!

Anyway, what you likely want to do since you are having problems, is use
PXELINUX' DHCP options to continue to use the HTTP provided by gPXE, but
still using PXELINUX as a middle-man for MEMDISK to work.

Take a look at syslinux/doc/rfc5071.txt.  Basically, do this:

Embedded script:

#!gpxe
dhcp net0
set dns:ipv4 10.68.161.3
chain
http://reference-linux.inetpsa.com/init.php?mac=${net0/mac}&manu=${manuf
acturer:uristring}&product=${smbios/1.5.0:uristring}

init.php will return a gPXE script based on your params, with the
default one like this:

#!gpxe
set 209:string menu.ini
set 210:string http://reference-linux.inetpsa.com/
chain pxelinux.0

Your menu.ini file should tell PXELINUX to immediately load
[VESA]MENU.C32 which will then reload menu.ini and offer the menuing
system.  Note that any relative (non-fully-specified) filepaths in your
menu.ini will default to being fetched via gPXE-provided HTTP and with
the 210 prefix you specified earlier.  Maybe your default will be
MEMDISK, since menu.ini can load menu.c32 by default (for pxelinux.0)
but have a [vesa]menu.c32-specific default, as well.

I _really_ wish you good luck with this one, because of this message's
first line.  *volcano*

- Shao Miller

-----Original Message-----
From: syslinux-bounces at zytor.com [mailto:syslinux-bounces at zytor.com] On
Behalf Of pierre.gentile at mpsa.com
Sent: Monday, April 27, 2009 05:01
To: syslinux at zytor.com
Subject: Re: [syslinux] memdisk issue with gpxelinux.0


> I have to say that invoking a gPXE script from a comboot menu when
> you're running on top of gpxelinux.0 seems a bit overly complex, no?

Thank you for your answers, I have tried to call memdisk directly from
menu.c32 with the same result ...

My config is a bit complex because we're trying to create an alternative
to
Rembo (Tivoli Provisionning Manager) already in production and
provisioning
a lot of servers (windows included). And that without removing Rembo for
now

To do that we're using the redirection capability of Rembo to redirect
to
out pxe server which launch gpxelinux with an embeded script able to
initiate a gpxe script on a web server. This script then execute
menu.c32
with a php generated configuration :-)

Here is my embeded script for gpxelinux :

#!gpxe
imgload pxelinux.0
dhcp net0
set dns:ipv4 10.68.161.3 (needed but I don't know why because the dhcp
already gives us the dns information !)
chain http://reference-linux.inetpsa.com/init.gpxe

My init.gpxe:

#!gpxe
set 210:string http://reference-linux.inetpsa.com/
kernel -n menu modules/menu.c32
http://reference-linux.inetpsa.com/init.php?mac=${net0/mac}&manu=${manuf
acturer:uristring}&product=${smbios/1.5.0:uristring}
boot menu

The relevant part of  init.php:

label Rembo
  menu label Redirection rembo
  kernel /rembo.gpxe
  append ""

The rembo.gpxe file:

#!gpxe
kernel /modules/memdisk /freedos
initrd /freedos
boot memdisk

As soon as I have a working configuration I'll add an entry in the wiki
hoping it will be useful to others

Sorry for my poor english

Regards

Pierre

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