Bug#336518: yaird: document using NFS Root
On Tue, Nov 01, 2005 at 06:02:57PM +0100, Jonas Smedegaard wrote:
> On Mon, 31 Oct 2005 19:52:52 -0700 Vagrant Cascadian <vagrant+bugs@freegeek.org> wrote:
> > On Sun, Oct 30, 2005 at 11:51:11PM +0100, Jonas Smedegaard wrote:
> > > Currently, MOUNTDIR does not support nfsroot so needs to be
> > > commented out completely.
> >
> > ugh.
>
> Well, actually... Looking at FsEntry.pm and other code it might actually
> be supported somehow - or support is halfway there...
It's recognised as something we can't support. Mounting eg
'www.debian.org:/boot' would require name resolution, and there's way
too much guesswork involved in doing that on the initial boot disk:
do you want /etc/hosts? LDAP? NIS? DNS? There's other unpleasantness
involved in trying to interpret nfs partitions from fstab on the boot
image, but this is the most obvious one.
Instead, pass ip= and nfsroot= on the kernel command line as documented
in kernel tree Documentation/nfsroot.txt. Do not pass "root=" on the
kernel command line. /init ignores it, but perhaps it confuses the kernel.
The most common form is ip=eth0 or ip=all, with nfsaddr= omitted.
This will do DHCP initialisation of ethernet device, and get mount
point over DHCP in the usual manner.
What happens if you omit ip= depends on your config file: you could use a
hard disk instead, or start an ssh deamon, or simply panic. More variations
possible that can be expressed in a simple command yaird command line option.
You may want to remove IP addresses from all your network cards,
then run "/usr/lib/yaird/exec/ipconfig ip=all" to get a feeling for
what the IP client code does.
Patches for the manual page are welcome.
Regards,
Erik
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