Re: diskless FreeBSD with grub

[Daniel Hepper]

 --- Ursprüngliche Nachricht --- 
 Von: Richard Burakowski [EMAIL PROTECTED] 
 An: Daniel Hepper [EMAIL PROTECTED] 
 Kopie: freebsd-questions@freebsd.org 
 Betreff: Re: diskless FreeBSD with grub 
 Datum: Thu, 03 Nov 2005 10:22:15 +1100 
  
 Daniel Hepper wrote: 
  
 Hi, 
  
 I want to boot diskless into FreeBSD-5.4 with grub. 
  
 snip 
 title bsd-nfsroot 
 kernel (nd)/kernel/kernel ip=dhcp root=/dev/nfs 
 nfsroot=141.2.71.253:/dta/fBSD_diskless 
 boot 
 /snip 
  
 It loads the kernel, but does not boot. My guess is that it doesn't 
find 
 the root partition. 
  
 if you look carefully, it's telling you where it thinks the root  
 partition is.  if that looks right, then check your nfs server log. 
  
 you have seen the diskless booting howto on freebsd.org (among others)  
 and recompiled your kernel for diskless booting? IIRC the kernel goes  
 through a second round of querying dhcp for info. 
Thanks for your hints! 
I've read the diskless booting howto before, but I did not yet built a 
custom kernel. Now I have a custom kernel with: 
  
options BOOTP  # Use BOOTP to obtain IP address/hostname 
options BOOTP_NFSROOT  # NFS mount root file system using BOOTP info 
hints  GENERIC.hints 
 
When I boot this kernel from disk, it shows the device hints, sends out 
dhcp-requests and tries to mount / with nfs. 
 
But when I load it over the net, i get the following: 
 
grub root (nd) 
Filesytem type is tftp, using hole disk. 
 
grub kernel --type=freebsd /freebsd-boot/kernel/kernel 
   [FreeBSD-elf, 0x40:0x446f54:0x0,0x847f60:0x7d600:0x4fce0, 
shtab=0 
16438, entry=0x43f2b0] 
 
grub boot 
 
The prompt disappears and the system reboots after approx. 25 sec. 
(The custom kernel has the same behaviour as the default kernel from the 
FreeBSD installationdisk) 
 
Where does it tell me where it thinks the root filesystem is? 
 
Greetings, 
Daniel Hepper 

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diskless FreeBSD with grub

[Daniel Hepper]

Hi,

I want to boot diskless into FreeBSD-5.4 with grub.
I've setup dhcp to provide boot and ip information, tftp to load the
kernel and nfs to share the root filesystem. It runs smoothly when I use
the pxeloader from FreeBSD, but I can't get it working with Grub.

I tried this grub configuration:

snip
title bsd-nfsroot
kernel (nd)/kernel/kernel ip=dhcp root=/dev/nfs
nfsroot=141.2.71.253:/dta/fBSD_diskless
boot
/snip

It loads the kernel, but does not boot. My guess is that it doesn't find
the root partition.
This one:

snip
title bsd-nfsroot
kernel (nd)/loader ip=dhcp root=/dev/nfs
nfsroot=141.2.71.253:/dta/fBSD_diskless
boot
/snip

loader says it can't find the kernel.
And this one:

snip
title bsd-nfsroot
kernel (nd)/pxeboot ip=dhcp root=/dev/nfs
nfsroot=141.2.71.253:/dta/fBSD_diskless
boot
/snip

grub complains that pxeboot is not a correct executable

I have spent hours digging the web without a solution. I would really
appreciate it, if someone could help or give me a pointer to helpful
resources.

The background of the problem:
I manage the software installation on a router-testbed. It consist of 24
identical x86-systems, with different local OS installation. When a
system boots, it load GRUB via PXE from a server. The grub menu is
generated dynamically from a configuration file, which determines what
OS the system should start.
For administration purposes, among other things software distribution,
you can configure the systems to boot a diskless linux system via nfs
(this works).
But as some users run FreeBSD and Linux can't access UFS2-partitions, a
diskless FreeBSD-image is required.


Greetings,
Daniel Hepper
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