Re: TFTP spawn issue

[IT geek 31 <itgeek31%googlemail.com@localhost>]

Hi all,

Thanks for your advice.  I'm inclined to agree with Johnny - something
isn't right and I don't think increasing the spawn rate is solving the
issue.

I have turned on debugging for inetd, although I'm no clearer.

When the client boots, it appears as if it's asking for each file 7
times.  /var/log/messages shows this:

<snip>
Mar 27 17:06:10 qube1 tftpd[1782]: esxi.mdb.eu.com: read request for
//esxi50/ehci-ehc.v00: success
Mar 27 17:06:10 qube1 tftpd[1570]: esxi.mdb.eu.com: read request for
//esxi50/ehci-ehc.v00: success
Mar 27 17:06:10 qube1 tftpd[1688]: esxi.mdb.eu.com: read request for
//esxi50/ehci-ehc.v00: success
Mar 27 17:06:10 qube1 tftpd[1724]: esxi.mdb.eu.com: read request for
//esxi50/ehci-ehc.v00: success
Mar 27 17:06:10 qube1 tftpd[1759]: esxi.mdb.eu.com: read request for
//esxi50/ehci-ehc.v00: success
Mar 27 17:06:10 qube1 tftpd[1598]: esxi.mdb.eu.com: read request for
//esxi50/ehci-ehc.v00: success
Mar 27 17:06:11 qube1 tftpd[1186]: esxi.mdb.eu.com: read request for
//esxi50/ehci-ehc.v00: success
</snip>

The console is outputting this:

<snip>
2245 execl /usr/libexec/tftpd
2245 reaped, status 0
restored tftp, fd 5
someone wants tftp
</snip>

In the end the client will refuse to boot, and ask to be rebooted.
/var/log/messages shows this error:

Mar 27 17:07:05 qube1 tftpd[1603]: Received *code 768* in sendfile
Mar 27 17:07:25 qube1 last message repeated 4 times

Any idea what that means?

I have checked the md5sum of the ISO and unpacked it again - the boot
files seem good.

Johnny - how do I run TFTP by hand from the command line?

Again, thanks to all for your input,


-Mark


On 26 March 2012 21:47, Johnny Billquist <bqt%softjar.se@localhost> wrote:
> I think that is bad advice. If the max spawn rate is exceeded, there is
> something wrong. Increasing the max spawn rate will not solve that, but
> can cause greater problems. However, I suspect the end result will just
> be the same, but it will have forked more times before disabling the
> service.
>
> What I'd do is I'd disable the service in inetd.conf, and run it by hand
> on the command line, with debugging enabled. That would probably give a
> hint on what the problem is.
>
>        Johnny
>
> On 2012-03-26 12:56, MASUDA Hideo wrote:
>> -----BEGIN PGP SIGNED MESSAGE-----
>> Hash: SHA1
>>
>> Hi Mark,
>>
>>   Try this configuration.
>>
>> /etc/inetd.conf ---
>> tftp dgram udp wait:400 root /usr/libexec/tftpd       tftpd -l -s /tftpboot
>> #                  ^^^^<- increase max spawn rate
>> #                          from 40 (default) to 400 (example).
>>
>>   See Also inetd.conf(5).
>>
>> Cheers.
>> - --
>> MASUDA Hideo (h-masuda%ootani.nagata.kobe.jp@localhost)
>> FingerPrint = C532 9F5B 4D7D DA76 8BFF  CAA3 C073 5C9E 10FF 98EF
>>
>> 2012/03/24 00:37, IT geek 31 wrote:
>>> I am trying to PXE boot an OS installation media using both PXE and TFTP.
>>>
>>> I have configured DHCP, the PXE menu file and the appropriate file
>>> structure without issue.
>>>
>>> However, as my client boots, on the NetBSD server I receive the
>>> following error in /var/log/messages:
>>>
>>>            Mar 23 16:35:41 qube1 inetd[596]: tftp/udp max spawn rate
>>> (40 in 60 seconds) exceeded; service not started
>>>
>>> At this point it appears the TFTP daemon crashes and the OS
>>> installation on the client fails.
>>>
>>> I have tried changing the following line to nowait in /etc/inetd.conf,
>>> but after a reboot, TFTP refuses to start:
>>>
>>>            tftp            dgram   udp     wait    root
>>> /usr/libexec/tftpd      tftpd -l -s /tftpboot
>>>
>>> Anyone have any idea what I need to do to get it working?  I'm running
>>> NetBSD/cobalt 5.1.
>>>
>>> Many thanks,
>>>
>>>
>>> -Mark
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>
>
> --
> Johnny Billquist                  || "I'm on a bus
>                                  ||  on a psychedelic trip
> email: bqt%softjar.se@localhost             ||  Reading murder books
> pdp is alive!                     ||  tryin' to stay hip" - B. Idol