Re: TFTP spawn issue

[Johnny Billquist <bqt%softjar.se@localhost>]

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
> > > > >
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> > > > > -----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