linux-image-3.12-0.bpo.1-amd64 dracut: FATAL: Don`t know how to handle root=/srv/fai/nfsroot

[René Bleisch]

Versions:
fai 4.1
dracut ? (where can I find this out?)

I think I remember the problem now:
Last year, when I set up the new wheezy-FAI-server, I first set 
"NFSROOT=/srv/fai/nfsroot"  in nfsroot.conf (as in the 
"make_fai_nfs_root.conf" file in my old fai 3.4.7 server) .

However, tftp/dracut then tried to mount the nfsroot from the 
dhcp-server :-( (not on the same machine...*)

I just tried a test installation with NFSROOT=/srv/fai/nfsroot and 
indeed the installation stops with
"mount.nfs: access denied by server while mounting 
130.92.143.225:/srv/fai/nfsroot"

Indeed, 130.92.143.225 is the dhcp-server machine, and in the syslog of 
this machine I find
Apr 25 13:10:57 kuppacific rpc.mountd[1658]: refused mount request from 
kuphalmahera.unibe.ch for /srv/fai/nfsroot (/): no export entry

(kuphalmahera.unibe.ch is the host to install)

If I put "NFSROOT=phkup26:/srv/fai/nfsroot" it worked until ~one month 
ago, but now I had to put
"NFSROOT=nfs:phkup26:/srv/fai/nfsroot" into nfsroot.conf to get it to 
work again.

PS: If I'm right, fai-chboot just takes the NFSROOT variable from 
nfsroot.conf to create the nfsroot kernel command line parameter entry
(I invoke it with /usr/sbin/fai-chboot -IFv -u 
nfs://phkup26/srv/fai/config <hostname>)

Regards
René


* Since years I have a dhcp-server for our network on a special machine. 
In the dhcpd.conf I just declared a special "group" for the FAI-hosts:
-------
group {
    server-name "kuppacific.unibe.ch";
    next-server phkup26;
    use-host-decl-names on;
    filename "fai/pxelinux.0";
...

This worked for years with the old FAI-server


On 04/25/2014 10:57 AM, Thomas Lange wrote:
>>>>>> On Fri, 25 Apr 2014 09:13:35 +0200, René Bleisch <accounts at climate.unibe.ch> said:
>      > It seems that now "nfs" is needed at the begin of the NFSROOT entry in nfsroot.conf, to get dracut to recognize the fai-server
>      > NFSROOT=nfs:phkup26:/srv/fai/nfsroot    (instead of  NFSROOT=phkup26:/srv/fai/nfsroot )
>
> Which FAI and dracut version are you using?
> I have this in my nfsroot.conf:
>     NFSROOT=/srv/fai/nfsroot
>
> I'm sure, I never had a host name in this line.
> IIRC NFSROOT should not be used for specifying the nfsroot kernel
> command line parameter. man dracut.cmdline says: ".. root=/dev/nfs
> nfsroot=  is deprecated". Now you should use root=.
>
> I have root=123.45.67.8:/srv/fai/nfsroot in my pxelinux.cfg files.
>
>
>      > Was there a change in fai-chboot? (Did former versions eventually add the "nfs:" automatically to the nfsroot when creating the tftp-file?)
> Yes, there was a change in FAI 4.1.
>
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