[K12OSN] Kernel Panic

[Eric Harrison]

On Mon, 5 Dec 2005, John G. Ruff wrote:

> Server: Dual P3/850, 1 Gb RAM, 4 x 18 Gb SCSI-3 software RAID-5, 2 x
> Intel 10/100 NICs
>
> This server has been running K12LTSP 4.4.1 for several weeks with no
> problems. No configuration files or anything have been changed. Today,
> thin clients cannot connect to it, giving the following text on the
> screen:
>
> Running dhcpcd on port 67
>
> Error!! No root-path, Check your DHCP configuration, to make
>        sure that the 'option root-path' is specified
>
> Kernel panic: Attempted to kill init!

This often means one of two things: 1) your /etc/dhcpd.conf file
was modified or the more likely 2) you have a rogue DHCP server.

You can test your dhcpd.conf file with this command:

 	rpm -Vf /etc/dhcpd.conf

If there is no output from this command, it is in good shape.
If the output looks like this:

 	S.?....TC c /etc/dhcpd.conf

the file has been modified - which is not necessarily bad, but you
should check it.


If you turn off your dhcp server:

 	/sbin/service dhcpd stop

and you can still get an IP address, you have a rogue DHCP server ;-)

(don't forget to turn dhcp back on:  /sbin/service dhcpd start)


> --------
>
> The server /var/log/messages has the following:
>
> Dec  5 16:13:22 o1 dhcpd: DHCPDISCOVER from 00:10:dc:c8:f9:13 via eth0
> Dec  5 16:13:23 o1 dhcpd: DHCPOFFER on 192.168.0.80 to 00:10:dc:c8:f9:13
> via eth0
> Dec  5 16:13:26 o1 dhcpd: DHCPREQUEST for 192.168.0.80 (192.168.0.244)
> from 00:10:dc:c8:f9:13 via eth0
> Dec  5 16:13:26 o1 dhcpd: DHCPACK on 192.168.0.80 to 00:10:dc:c8:f9:13
> via eth0
> Dec  5 22:13:26 o1 in.tftpd[9951]: tftp: client does not accept options
> Dec  5 16:13:32 o1 dhcpd: DHCPDISCOVER from 00:10:dc:c8:f9:13 via eth0
> Dec  5 16:13:32 o1 dhcpd: DHCPREQUEST for 192.168.0.65 (192.168.0.254)
> from 00:10:dc:c8:f9:13 via eth0
> Dec  5 16:13:32 o1 dhcpd: DHCPACK on 192.168.0.65 to 00:10:dc:c8:f9:13
> via eth0
> Dec  5 16:13:33 o1 dhcpd: DHCPOFFER on 192.168.0.95 to 00:10:dc:c8:f9:13
> via eth0
>
> --------
>
> The odd things here are the tftp line, and the dhcpd strangeness after
> that error. The tftpd service is running & working, I can connect to it
> and get files.

The "tftp: client does not accept options" is normal.

> I have spent most of today reading the archives here and googling all
> over and have not figured it out. Any ideas would be greatly
> appreciated.
>
> john

-Eric