[rancid] Re: Solved - Re: Nexus expect looping
john heasley
heas at shrubbery.net
Wed Oct 7 19:35:13 UTC 2009
Wed, Oct 07, 2009 at 11:38:15AM -0700, Dan_Mitton at YMP.GOV:
> I have the answer!!...
>
> clogin tries to do a 'terminal length 0' to turn paging off. Under NX-OS,
> that command is only available to users with the roles 'vdc-admin' and
> 'network-admin'. My rancid user was logging in and was only a
> 'vdc-operator', so the command failed, so the expect script would hang at
> the first --More-- prompt, until it timed out, then it would loop.
it (expect) should not spin out, regardless of pager issue.
> Now on to all of the other nxrancid problems.
>
>
>
>
> To: Dan_Mitton at YMP.GOV
> cc: john heasley <heas at shrubbery.net>, rancid-discuss at shrubbery.net
> Subject: Re: [rancid] Nexus expect looping
> LSN: Not Relevant - Not Privileged
> User Filed as: Excl/AdminMgmt-14-4/QA:N/A
>
> Tue, Oct 06, 2009 at 03:27:10PM -0700, Dan_Mitton at YMP.GOV:
> > Ok, some more info I just discovered...
> >
> > Our whole configuration is 3 Nexus and about 20 misc. other Cisco IOS
> and
> > CatOS switches/routers. Everything seems to be working except 1 of the
> > Nexus servers. It is running a slightly old version of its software
> then
> > the other 2...
> >
> > Broken:
> >
> > Software
> > BIOS: version 1.2.0
> > loader: version N/A
> > kickstart: version 4.0(1a)N2(1)
> > system: version 4.0(1a)N2(1)
> > BIOS compile time: 06/19/08
> > kickstart image file is:
> bootflash:/n5000-uk9-kickstart.4.0.1a.N2.1.bin
> > kickstart compile time: 2/25/2009 0:00:00 [02/25/2009 08:29:12]
> > system image file is: bootflash:/n5000-uk9.4.0.1a.N2.1.bin
> > system compile time: 2/25/2009 0:00:00 [02/25/2009 08:56:57]
> >
> > Working:
> >
> > Software
> > BIOS: version 1.2.0
> > loader: version N/A
> > kickstart: version 4.1(3)N1(1)
> > system: version 4.1(3)N1(1)
> > BIOS compile time: 06/19/08
> > kickstart image file is: bootflash:/n5000-uk9-kickstart.4.1.3.N1.1.bin
> > kickstart compile time: 7/23/2009 17:00:00 [07/24/2009 00:53:59]
> > system image file is: bootflash:/n5000-uk9.4.1.3.N1.1.bin
> > system compile time: 7/23/2009 17:00:00 [07/24/2009 01:42:52]
> >
> > Doing 'top' on the machine, I see 'expect' doing its normal thing for a
> > while and then waiting (for a long time), before looping to 100% cpu.
>
> yes, iirc from the debugging, whatever happened before (dont really care)
> would leave it with the device having closed the connection to the rancid
> host. at that point, expect should receive an EOF when trying to read
> from the half-closed (and drained) pty/file descriptor, but it doesnt.
>
> Either try rolling back to the suggested tcl/expect or report it to fbsd
> ports maintainers.
>
> > I added some debugging lines to nxrancid, to print out the $linecnt and
> $_
> > and found...
> >
> > linecnt = 57, [vlan 200
> > ]
> > linecnt = 58, [ name dan-test
> > ]
> > linecnt = 59, [
> > ]
> > linecnt = 60, [Error: TIMEOUT reached
> > ]
> > linecnt = 61, [Hangup
> > ]
> >
> > The 'Hangup' is (I assume) from me 'kill -HUP <pid>' the expect process.
>
> > If I resize my terminal window from 60 lines, down to 50 lines, I then
> > get...
> >
> > linecnt = 48, [tacacs-server directed-request
> > ]
> > linecnt = 49, [
> > ]
> > linecnt = 50, [Error: TIMEOUT reached
> > ]
> > linecnt = 51, [Hangup
> > ]
> >
> > So it seems like the 'pager' is involved some how.
> >
> >
> >
> >
> >
> >
> >
> > To: Dan_Mitton at YMP.GOV
> > cc: john heasley <heas at shrubbery.net>, rancid-discuss at shrubbery.net
> > Subject: Re: [rancid] Nexus expect looping
> > LSN: Not Relevant - Not Privileged
> > User Filed as: Excl/AdminMgmt-14-4/QA:N/A
> >
> > Tue, Oct 06, 2009 at 12:45:46PM -0700, Dan_Mitton at YMP.GOV:
> > > pkg_info shows me the same version of expect, but a newer version of
> > > tcl...
> > >
> > > pkg_info | egrep "expect|tcl"
> > > expect-5.43.0_3 A sophisticated scripter based on tcl/tk
> > > tcl-8.4.19_3,1 Tool Command Language
> > >
> > > Do you think I should go back to the older version of tcl?
> >
> > Please try it; I dont use fbsd regularly, but I know the combination
> > below is working.
> >
> > > Dan
> > >
> > >
> > >
> > >
> > > To: Dan_Mitton at YMP.GOV
> > > cc: rancid-discuss at shrubbery.net
> > > Subject: Re: [rancid] Nexus expect looping
> > > LSN: Not Relevant - Not Privileged
> > > User Filed as: Excl/AdminMgmt-14-4/QA:N/A
> > >
> > > Tue, Oct 06, 2009 at 10:28:01AM -0700, Dan_Mitton at YMP.GOV:
> > > > John,
> > > >
> > > > Thanks for your reply. I'm running FreeBSD 7.2:
> > > >
> > > > FreeBSD host.ymp.gov 7.2-RELEASE FreeBSD 7.2-RELEASE #0: Fri May 1
> > > > 07:18:07 UTC 2009
> > > > root at driscoll.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC amd64
> > > >
> > > > expect verion:
> > > >
> > > > expect version 5.43.0
> > >
> > > Its most likely your expect/tcl set. A friend (and others) has had
> > > this problem a few times. He recently updated his ports and the set
> > > of tcl/expect that he got with that update has been working. pkginfo
> > > on that host gives me:
> > >
> > > expect-5.43.0_3 A sophisticated scripter based on tcl/tk
> > > tcl-8.3.5_8 Tool Command Language
> > >
> > > >
> > > >
> > > >
> > > > To: Dan_Mitton at YMP.GOV
> > > > cc: rancid-discuss at shrubbery.net
> > > > Subject: Re: [rancid] Nexus expect looping
> > > > LSN: Not Relevant - Not Privileged
> > > > User Filed as: Excl/AdminMgmt-14-4/QA:N/A
> > > >
> > > > Tue, Oct 06, 2009 at 10:01:23AM -0700, Dan_Mitton at YMP.GOV:
> > > > > I am trying to get Rancid to scan a Cisco Nexus 5000, but I'm
> having
> >
> > > > > problems.
> > > > >
> > > > > First, it tried to run the command 'show version build-info all',
> > > which
> > > > > doesn't exist, so I commented it out of the nxrancid file.
> > > >
> > > > that should not be necessary, it should just skip it.
> > > >
> > > > > Second, it seems to get most of the way through (I think), but
> then
> > > the
> > > > > expect process goes to 100% CPU until it is killed.
> > > > >
> > > > > The Nexus 5000 is running:
> > > > >
> > > > > Software
> > > > > BIOS: version 1.2.0
> > > > > loader: version N/A
> > > > > kickstart: version 4.1(3)N1(1)
> > > > > system: version 4.1(3)N1(1)
> > > > > BIOS compile time: 06/19/08
> > > > > kickstart image file is:
> > > bootflash:/n5000-uk9-kickstart.4.1.3.N1.1.bin
> > > > > kickstart compile time: 7/23/2009 17:00:00 [07/24/2009
> 00:53:59]
> > > > > system image file is: bootflash:/n5000-uk9.4.1.3.N1.1.bin
> > > > > system compile time: 7/23/2009 17:00:00 [07/24/2009
> 01:42:52]
> > > > >
> > > > > and has 1 - 2148 hung off of it.
> > > > >
> > > > > Any ideas??
> > > >
> > > > Most like its expect on you O/S. What OS and expect version? did
> you
> > > > look at the o/s section on the rancid web page.
> > > >
> > > >
> > >
> > >
> >
> >
>
>
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