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

[rsb]

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

[Andrey Borzenkov]

В Wed, 5 Mar 2014 20:53:05 +0200

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

For a start, grub does not support NFS.

Post by rsb
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.

Post by rsb
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).

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

That's correct.

Post by rsb
* 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

[Vladimir 'φ-coder/phcoder' Serbinenko]

Post by Andrey Borzenkov
If I'm not mistaken, ls currently supports only disk devices.

tftp (protocol) simply doesn't provide any way to list files.

[Andrey Borzenkov]

В Thu, 13 Mar 2014 21:58:03 +0930

Post by Vladimir 'φ-coder/phcoder' Serbinenko

Post by Andrey Borzenkov
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.

[r***@ttmail.com]

Post by rsb
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.