Re: TFTP spawn issue

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

Hmmm, I'm in two minds on how to proceed with this.

Either I go down the tcpdump / debugging route, or try and compile
tftp-hpa from source and get that working - both a little outside my
wheelhouse.

I shall let yo know how I get on :-S

Thanks again to all for your help so far,


-Mark


On 28 March 2012 03:53, Johnny Billquist <bqt%softjar.se@localhost> wrote:
> Hmm. My bad then. I thought I had run tftpd from the command line in the
> past, but I must not have, since this would suggest it needs inetd to change
> stdin (I assume) to the socket.
>
> My only remaining suggestions right now are to put -d in the inetd.conf
> file, and check the logs. And possibly also run tcpdump and check what is
> going on. Or else start digging in the code.
>
>        Johnny
>
> On 2012-03-27 21:17, IT geek 31 wrote:
>>
>> 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
>>>>>>
>>>>>>
>>>>>> -----BEGIN PGP SIGNATURE-----
>>>>>> Version: GnuPG v1.4.11 (GNU/Linux)
>>>>>> Comment: Using GnuPG with Vine - http://enigmail.mozdev.org/
>>>>>>
>>>>>> iQEcBAEBAgAGBQJPcEtkAAoJEMBzXJ4Q/5jvQPQH/3eWdf+MD58DD5TnwnaGqzfT
>>>>>> 9qSk1uPl2mzxI4uIJ4BFfLfkNAkHbPw5iDpawy85mTRG06KiXyHp/6iljvNH8+gy
>>>>>> ELo0JpOz3fz0MBnxSWIbR9RLZluqDbk6JWJidX13j2dO+ZoQN6v7nxIW/b//RsA8
>>>>>> tCoVTLiXwC59j5Mz5tmFByLoWLN7cPpCBq830LG7neCd6QGhs6N+SEVgUoBsKMiR
>>>>>> dQ5jCHwUcmNxcfNYnMTGVdAylwQVvx1pHjhaMcmywM3E0UaoxMbBco4xpG0nLHqQ
>>>>>> 0JhjjYBvv8SD/dwsBK+SmJGsZF1KRX2+xsy+J9OQHOMr3XWFFDgyH/SCqJ+AE5Y=
>>>>>> =R5jH
>>>>>> -----END PGP SIGNATURE-----
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> 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
>>>
>>>
>>>
>
>
> --
> 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