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Re: [K12OSN] Kernel Panic



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


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