Re: TFTP spawn issue

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

Yeah I tried that and it mugged me off :-S

I tried running:

/usr/libexec/tftpd -l -d -s /tftpboot/

And all I get in /var/log/messages is:

Mar 27 21:14:30 qube1 tftpd[430]: recvfrom: Socket operation on non-socket

I also don't know why it is retrying as it is definitely receiving the
files... the client (in this the ESXi 5 installer) helpfully outputs
the files it has loaded as it progresses....

And now I am stuck.


-Mark


On 27 March 2012 17:30, Johnny Billquist <bqt%softjar.se@localhost> wrote:
> man tftpd ? :-)
>
> In short, you just run it. Preferrably with the same switches as specified
> in inetd.conf
>
> You probably also want to add the "-d" switch...
>
> As for the 7 requests, it's probably retrying as it isn't getting responses.
>
> The interesting part is probably what you see in the syslog.
> I'd need to dig in a bit further to know more in detail, but I don't have
> time for all that fun right now. :-)
>
>        Johnny
>
> On 2012-03-27 17.12, IT geek 31 wrote:
>>
>> 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
>
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