pxe-nfs-loop-iso syntax in grub.cfg

pxe-nfs-loop-iso syntax in grub.cfg

[rsb]

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How do you pass a pxe-nfs-loop-iso syntax in grub.cfg? I'm trying to boot
iso file (loopback) over pxe. I get far as the grub.cfg menu, but the entry
below aborts with "no loop disk".  "grub-cli> ls" shows nothing (no pxe
listing).

insmod loopback
insmod  gzio
insmod  iso9660
menuentry 'Lubuntu 13.04' {
set root='pxe'
set isofile="path/file"
loopback loop (pxe)$isofile
linux (loop)/casper/vmlinuz boot=casper iso-scan/filename=$isofile
initrd (loop)/casper/initrd.lz     }

I also think that above entry would be sending the file over tftp and not
nfs. An alternative menu entry for example that I came accross:
* linux  (pxe)/gentoo32/mnt/isolinux/gentoo loop=/image.squashfs
root=/dev/ram0 init=/linuxrc looptype=squashfs
nfsroot=<IP>:/dist/gentoo32/mnt cdroot=1 real_root=/dev/nfs

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Re: pxe-nfs-loop-iso syntax in grub.cfg

[Andrey Borzenkov]

В Wed, 5 Mar 2014 20:53:05 +0200
rsb <rsb@ttmail.com> пишет:

> How do you pass a pxe-nfs-loop-iso syntax in grub.cfg?

For a start, grub does not support NFS.

>                                                         I'm trying to boot
> iso file (loopback) over pxe. I get far as the grub.cfg menu, but the entry
> below aborts with "no loop disk".  "grub-cli> ls" shows nothing (no pxe
> listing).
> 

If I'm not mistaken, ls currently supports only disk devices.

> insmod loopback
> insmod  gzio
> insmod  iso9660
> menuentry 'Lubuntu 13.04' {
> set root='pxe'
> set isofile="path/file"
> loopback loop (pxe)$isofile
> linux (loop)/casper/vmlinuz boot=casper iso-scan/filename=$isofile
> initrd (loop)/casper/initrd.lz     }
> 

How do you boot grub? PXE is active only if you have actually booted
over network; if not, you cannot use network on BIOS systems (there are
simply no drivers).

> I also think that above entry would be sending the file over tftp and not
> nfs.

That's correct.

>     An alternative menu entry for example that I came accross:
> * linux  (pxe)/gentoo32/mnt/isolinux/gentoo loop=/image.squashfs
> root=/dev/ram0 init=/linuxrc looptype=squashfs
> nfsroot=<IP>:/dist/gentoo32/mnt cdroot=1 real_root=/dev/nfs

Re: pxe-nfs-loop-iso syntax in grub.cfg

[Vladimir 'φ-coder/phcoder' Serbinenko]

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On 13.03.2014 15:27, Andrey Borzenkov wrote:
> If I'm not mistaken, ls currently supports only disk devices.
tftp (protocol) simply doesn't provide any way to list files.


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Re: pxe-nfs-loop-iso syntax in grub.cfg

[Andrey Borzenkov]

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В Thu, 13 Mar 2014 21:58:03 +0930
Vladimir 'φ-coder/phcoder' Serbinenko <phcoder@gmail.com> пишет:

> On 13.03.2014 15:27, Andrey Borzenkov wrote:
> > If I'm not mistaken, ls currently supports only disk devices.
> tftp (protocol) simply doesn't provide any way to list files.
> 

Yes, but I mean ls without arguments that lists devices.

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Re: pxe-nfs-loop-iso syntax in grub.cfg

[rsb]

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 > How do you pass a pxe-nfs-loop-iso syntax in grub.cfg?
For a start, grub does not support NFS.

Yes I see, my mistake. Does grub support transfers other than tftp?
HTTP, for example?

  > (grub) aborts with "no loop disk".How do you boot grub? PXE is
active only if you have actually booted over network; 
Grub is booted over network. System starts, "boot from network" >
obtains IP from dhcpd > grub menu from server (laptop grub menu has
different entries than what server grub menu has) 

 Regards.

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