Re: [Nagios-users] nrpe errors when too many hosts

[William Leibzon]

Do you have servicegroups defined? How many services does it show in
the largest service group?

On Thu, Jun 20, 2013 at 12:13 AM, Aleksandr Miroslav
 wrote:
> hi,
>
> We have nagios server that is working for long time.
>
> We note recently when we add new hosts, all NRPE checks fail with:
>
> Return code of 127 is out of bounds - plugin may be missing
>
> However, the plugin is there and we know it run fine from command line. Only
> when some new hosts added this happens.  When you take  new hosts out,
> errors go away.
>
> We don't have too many hosts in our file, only about 250.
>
> This problem is identical to the one find here:
>
> http://readlist.com/lists/lists.sourceforge.net/nagios-users/5/29272.html
>
>
> Alex
>
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Re: [Nagios-users] nrpe errors when too many hosts

[Benny Crampton]

The error itself just means that Nagios can't find the plugin that you've
told it to use. Every time I've ever encountered this error it boils down
to something very simple; normally a typo or a mis-pasted file path.

When you added the hosts did you also add the service, or were you using a
service that has already been defined and used previously? Too, did you
make any changes to your check definitions at all?


On Thu, Jun 20, 2013 at 3:13 AM, Aleksandr Miroslav
wrote:

> hi,
>
> We have nagios server that is working for long time.
>
> We note recently when we add new hosts, all NRPE checks fail with:
>
> Return code of 127 is out of bounds - plugin may be missing
>
> However, the plugin is there and we know it run fine from command line.
> Only when some new hosts added this happens.  When you take  new hosts
> out,  errors go away.
>
> We don't have too many hosts in our file, only about 250.
>
> This problem is identical to the one find here:
>
> http://readlist.com/lists/lists.sourceforge.net/nagios-users/5/29272.html
>
>
> Alex
>
>
> --
> This SF.net email is sponsored by Windows:
>
> Build for Windows Store.
>
> http://p.sf.net/sfu/windows-dev2dev
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> reporting any issue.
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[Nagios-users] nrpe errors when too many hosts

[Aleksandr Miroslav]

hi,

We have nagios server that is working for long time.

We note recently when we add new hosts, all NRPE checks fail with:

Return code of 127 is out of bounds - plugin may be missing

However, the plugin is there and we know it run fine from command line.
Only when some new hosts added this happens.  When you take  new hosts
out,  errors go away.

We don't have too many hosts in our file, only about 250.

This problem is identical to the one find here:

http://readlist.com/lists/lists.sourceforge.net/nagios-users/5/29272.html


Alex
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[Nagios-users] NRPE Version 2.14

[Kaushal Shriyan]

Hi,

Have submitted a bug report for NRPE Version 2.14
http://tracker.nagios.org/view.php?id=431 Let me know if anyone needs
additional information.

Regards,

Kaushal
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Re: [Nagios-users] NRPE: Unable to read output; but works when run under strace ...

[Florian Ernst]

Hello Eliezer,

thanks for your reply.

On Mon, Jan 14, 2013 at 05:41:28PM +0200, Eliezer Croitoru wrote:
> I would try to run a basic script which logs the nrpe environment into a 
> file.
> it will make sure what is available to you and what not.
> 
> test if:
> [...]
> modify the above to make sure what is the cause of this problem.
> you can also try to access stdout\err

As mentioned in the original post¹ "indeed the desired text output is
generated [by the plugin] but somehow gets discarded [by NRPE]".
However, "if I strace the nrpe process, everything works as desired".

The latter is what irks me. The plugins themselves are running fine.

Cheers,
Flo


¹ http://sourceforge.net/mailarchive/message.php?msg_id=29939293

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Re: [Nagios-users] NRPE: Unable to read output; but works when run under strace ...

[Eliezer Croitoru]

I would try to run a basic script which logs the nrpe environment into a 
file.
it will make sure what is available to you and what not.

test if:
there are environment vars..
there is a STDOUT\IN\ERR available etc..

#!/usr/bin/env ruby
f = File.open("/tmp/nrpetest.log","a")
f.sync = true

f.puts "ENVIROMENTAR VARS\n==="
ENV.each {|k,p| f.puts "#{k} = #{p}"}

f.puts "STD DATA\n=="
f.puts "stdout exists?: #{$stdout}"
if $stdout

f.puts "stdout is tty?: #{$stdout.isatty}"
begin
   $stdout.write_nonblock "0"
   f.puts "Wrote 0 to stdout"
rescue => e
   f.puts "didnt wrote to stdout"
   f.puts e.message
   f.puts e.backtrace.inspect
end

end

modify the above to make sure what is the cause of this problem.
you can also try to access stdout\err

Regards,
Eliezer

On 1/8/2013 3:53 PM, Florian Ernst wrote:
> Hello all,
>
> following up to myself ...
>
> On Mon, Oct 08, 2012 at 08:31:21PM +0200, Florian Ernst wrote:
>> [...]
>> However, it got weirder: if I strace the nrpe process, everything works
>> as desired:
>> [...]
>> I found no further hints in the strace log, but this led me to assume
>> that there is some NRPE weirdness involved, and thus I'm writing here
>> instead of further digging through the system.
>>
>> Any ideas?
>
> Lacking any further clue as to what peculiarity might be responsible for
> this weird behavior, I decided to simply let the nrpe process
> permanently run under strace like
> strace -f -q -e none -o /dev/null ...
>
> The performance impact is minimal, and I finally get check results. Not
> really a solution, but it'll do.
>
> Cheers,
> Flo

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Re: [Nagios-users] NRPE: Unable to read output; but works when run under strace ...

[Florian Ernst]

Hello all,

following up to myself ...

On Mon, Oct 08, 2012 at 08:31:21PM +0200, Florian Ernst wrote:
> [...]
> However, it got weirder: if I strace the nrpe process, everything works
> as desired:
> [...]
> I found no further hints in the strace log, but this led me to assume
> that there is some NRPE weirdness involved, and thus I'm writing here
> instead of further digging through the system.
> 
> Any ideas?

Lacking any further clue as to what peculiarity might be responsible for
this weird behavior, I decided to simply let the nrpe process
permanently run under strace like
strace -f -q -e none -o /dev/null ...

The performance impact is minimal, and I finally get check results. Not
really a solution, but it'll do.

Cheers,
Flo

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Re: [Nagios-users] NRPE: Unable to read output; but works when run under strace ...

[Florian Ernst]

Hello John / Tech Support,

thanks for your reply, and sorry for the delay in answering.

On Wed, Oct 10, 2012 at 03:10:13PM -0400, Tech Support wrote:
> Whenever I've had a problem with a plugin, and was trying to figure out
> what was going on, I've had 100% success using a little PERL script called
> capture-plugin.pl that I found. You can find it here:
> http://www.waggy.at/nagios/capture_plugin.htm. You should check it out. It's
> genius is in its simplicity.

Well, it helps debugging plugin weirdness, but my problem lies with
NRPE: a check doesn't work when TTBOMK it should work, and it actually
works as desired when I strace the NRPE process.
At the moment I see no plugin to debug, but thanks anyway.

Cheers,
Flo

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Re: [Nagios-users] NRPE: Unable to read output; but works when run under strace ...

[Tech Support]

Whenever I've had a problem with a plugin, and was trying to figure out
what was going on, I've had 100% success using a little PERL script called
capture-plugin.pl that I found. You can find it here:
http://www.waggy.at/nagios/capture_plugin.htm. You should check it out. It's
genius is in its simplicity.
Regards;
John


-Original Message-
From: Florian Ernst [mailto:florian_er...@gmx.net] 
Sent: Tuesday, October 09, 2012 2:14 PM
To: Nagios Users List
Subject: Re: [Nagios-users] NRPE: Unable to read output; but works when run
under strace ...

Hello Peter,

thanks for your reply.

However, as previously written, I know of the peculiarities that might arise
once sudo joins the team, and in the issue at hand sudo is no more involved
than being used for illustration purposes while the issue itself doesn't
even remotely touch sudo at all.
Furthermore, I never found any the necessity to deal with !requiretty on
Debian, but indeed had to make use of this sudo option on RHEL. Still, no
sudo involved in this case, sorry ...

Cheers,
Flo


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Re: [Nagios-users] NRPE: Unable to read output; but works when run under strace ...

[Peter Kaagman]

> -Oorspronkelijk bericht-
> Van: Florian Ernst [mailto:florian_er...@gmx.net]
> Verzonden: dinsdag 9 oktober 2012 20:14
> Aan: Nagios Users List
> Onderwerp: Re: [Nagios-users] NRPE: Unable to read output; but works
> when run under strace ...
> 
> Hello Peter,
> 
> thanks for your reply.
> 
> However, as previously written, I know of the peculiarities that might arise
> once sudo joins the team, and in the issue at hand sudo is no more involved
> than being used for illustration purposes while the issue itself doesn't even
> remotely touch sudo at all.
> Furthermore, I never found any the necessity to deal with !requiretty on
> Debian, but indeed had to make use of this sudo option on RHEL. Still, no
> sudo involved in this case, sorry ...
> 
> Cheers,
> Flo

[Peter Kaagman] 
Sorry that did not help you. Guess I should have read you post more closely...

Peter

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Re: [Nagios-users] NRPE: Unable to read output; but works when run under strace ...

[Florian Ernst]

Hello Peter,

thanks for your reply.

However, as previously written, I know of the peculiarities that might
arise once sudo joins the team, and in the issue at hand sudo is no more
involved than being used for illustration purposes while the issue
itself doesn't even remotely touch sudo at all.
Furthermore, I never found any the necessity to deal with !requiretty on
Debian, but indeed had to make use of this sudo option on RHEL. Still,
no sudo involved in this case, sorry ...

Cheers,
Flo

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Re: [Nagios-users] NRPE: Unable to read output; but works when run under strace ...

[Peter Kaagman]

Lol... had me going for a while to... for me the awnser was in the sudo config 
(visudo)... it required a user on a tty... I believe the directive was 
"requiretty". Disable that line and you'll be fine I think.

Peter


Van: Florian Ernst [florian_er...@gmx.net]
Verzonden: maandag 8 oktober 2012 20:31
To: nagios-users@lists.sourceforge.net
Onderwerp: [Nagios-users] NRPE: Unable to read output;  but works when run 
under strace ...

Hello all,

given a fairly well-running monitoring setup with about 18k services I
thought I had understood the basics. However, the following leaves me
clueless, and I hope I'm merely missing something obvious here:

On an up-to-date Debian Squeeze (i386) OpenVZ guest I have established
that my monitoring user can execute a given command:

root@vserv08:/# sudo -u monitor -i /usr/lib/nagios/plugins/check_dummy 0 
success; echo Exitcode: $?
OK: success
Exitcode: 0

So far, so good. Now entering NRPE, using a stripped-down config for
illustrating the point:

root@vserv08:/# grep -v -e '^$' -e '^#' /etc/nagios/nrpe.cfg
debug=1
nrpe_user=monitor
nrpe_group=monitor
allowed_hosts=127.0.0.1
command[dummy]=/usr/lib/nagios/plugins/check_dummy 0 success

root@vserv08:/# ps auxww | grep '[/]usr/sbin/nrpe'
monitor   7215  0.0  0.1   3704   892 ?Ss   15:20   0:00 /usr/sbin/nrpe 
-c /etc/nagios/nrpe.cfg -d

The process startup logged as follows:

Oct  8 15:20:22 vserv08 nrpe[7214]: Added 
command[dummy]=/usr/lib/nagios/plugins/check_dummy 0 success
Oct  8 15:20:22 vserv08 nrpe[7214]: INFO: SSL/TLS initialized. All network 
traffic will be encrypted.
Oct  8 15:20:22 vserv08 nrpe[7215]: Starting up daemon
Oct  8 15:20:22 vserv08 nrpe[7215]: Listening for connections on port 5666
Oct  8 15:20:22 vserv08 nrpe[7215]: Allowing connections from: 127.0.0.1

However, executing the dummy command won't work:

root@vserv08:/# /usr/lib/nagios/plugins/check_nrpe -H 127.0.0.1 -c dummy
NRPE: Unable to read output

This has been logged as:

Oct  8 15:21:36 vserv08 nrpe[7234]: Connection from 127.0.0.1 port 48791
Oct  8 15:21:36 vserv08 nrpe[7234]: Host address is in allowed_hosts
Oct  8 15:21:36 vserv08 nrpe[7234]: Handling the connection...
Oct  8 15:21:36 vserv08 nrpe[7234]: Host is asking for command 'dummy' to be 
run...
Oct  8 15:21:36 vserv08 nrpe[7234]: Running command: 
/usr/lib/nagios/plugins/check_dummy 0 success
Oct  8 15:21:36 vserv08 nrpe[7234]: Command completed with return code 2 and 
output:
Oct  8 15:21:36 vserv08 nrpe[7234]: Return Code: 2, Output: NRPE: Unable to 
read output
Oct  8 15:21:36 vserv08 nrpe[7234]: Connection from 127.0.0.1 closed.

This strikes me as weird: nrpe tries to execute the defined command, but
somehow no output shows up. I know of the peculiarities that might arise
once sudo joins the team or when permissions aren't set appropriately,
but this doesn't apply here.

Playing around with the dummy command (substituting a shell script,
sprinkling '| tee -a logfile' into the code, ...) revealed that indeed
the desired text output is generated but somehow gets discarded. Perhaps
the monitoring user or even the whole system is subtly broken, but given
that there are ~400 similiarily setup systems (all using the same
workflow/automatisms for deploying the monitoring infrastructure) I was
starting to wonder how that might have happened ...

However, it got weirder: if I strace the nrpe process, everything works
as desired:

root@vserv08:/# strace -f -o /root/log -p 7215

And then in another terminal:

root@vserv08:/# /usr/lib/nagios/plugins/check_nrpe -H 127.0.0.1 -c dummy
OK: success

Logged as follows:

Oct  8 15:21:57 vserv08 nrpe[7240]: Connection from 127.0.0.1 port 37275
Oct  8 15:21:57 vserv08 nrpe[7240]: Host address is in allowed_hosts
Oct  8 15:21:57 vserv08 nrpe[7240]: Handling the connection...
Oct  8 15:21:57 vserv08 nrpe[7240]: Host is asking for command 'dummy' to be 
run...
Oct  8 15:21:57 vserv08 nrpe[7240]: Running command: 
/usr/lib/nagios/plugins/check_dummy 0 success
Oct  8 15:21:57 vserv08 nrpe[7240]: Command completed with return code 0 and 
output: OK: success
Oct  8 15:21:57 vserv08 nrpe[7240]: Return Code: 0, Output: OK: success
Oct  8 15:21:57 vserv08 nrpe[7240]: Connection from 127.0.0.1 closed.

I found no further hints in the strace log, but this led me to assume
that there is some NRPE weirdness involved, and thus I'm writing here
instead of further digging through the system.

Any ideas?

Cheers,
Flo

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[Nagios-users] NRPE: Unable to read output; but works when run under strace ...

[Florian Ernst]

Hello all,

given a fairly well-running monitoring setup with about 18k services I
thought I had understood the basics. However, the following leaves me
clueless, and I hope I'm merely missing something obvious here:

On an up-to-date Debian Squeeze (i386) OpenVZ guest I have established
that my monitoring user can execute a given command:

root@vserv08:/# sudo -u monitor -i /usr/lib/nagios/plugins/check_dummy 0 
success; echo Exitcode: $?
OK: success
Exitcode: 0

So far, so good. Now entering NRPE, using a stripped-down config for
illustrating the point:

root@vserv08:/# grep -v -e '^$' -e '^#' /etc/nagios/nrpe.cfg
debug=1
nrpe_user=monitor
nrpe_group=monitor
allowed_hosts=127.0.0.1
command[dummy]=/usr/lib/nagios/plugins/check_dummy 0 success

root@vserv08:/# ps auxww | grep '[/]usr/sbin/nrpe'
monitor   7215  0.0  0.1   3704   892 ?Ss   15:20   0:00 /usr/sbin/nrpe 
-c /etc/nagios/nrpe.cfg -d

The process startup logged as follows:

Oct  8 15:20:22 vserv08 nrpe[7214]: Added 
command[dummy]=/usr/lib/nagios/plugins/check_dummy 0 success
Oct  8 15:20:22 vserv08 nrpe[7214]: INFO: SSL/TLS initialized. All network 
traffic will be encrypted.
Oct  8 15:20:22 vserv08 nrpe[7215]: Starting up daemon
Oct  8 15:20:22 vserv08 nrpe[7215]: Listening for connections on port 5666
Oct  8 15:20:22 vserv08 nrpe[7215]: Allowing connections from: 127.0.0.1

However, executing the dummy command won't work:

root@vserv08:/# /usr/lib/nagios/plugins/check_nrpe -H 127.0.0.1 -c dummy
NRPE: Unable to read output

This has been logged as:

Oct  8 15:21:36 vserv08 nrpe[7234]: Connection from 127.0.0.1 port 48791
Oct  8 15:21:36 vserv08 nrpe[7234]: Host address is in allowed_hosts
Oct  8 15:21:36 vserv08 nrpe[7234]: Handling the connection...
Oct  8 15:21:36 vserv08 nrpe[7234]: Host is asking for command 'dummy' to be 
run...
Oct  8 15:21:36 vserv08 nrpe[7234]: Running command: 
/usr/lib/nagios/plugins/check_dummy 0 success
Oct  8 15:21:36 vserv08 nrpe[7234]: Command completed with return code 2 and 
output:
Oct  8 15:21:36 vserv08 nrpe[7234]: Return Code: 2, Output: NRPE: Unable to 
read output
Oct  8 15:21:36 vserv08 nrpe[7234]: Connection from 127.0.0.1 closed.

This strikes me as weird: nrpe tries to execute the defined command, but
somehow no output shows up. I know of the peculiarities that might arise
once sudo joins the team or when permissions aren't set appropriately,
but this doesn't apply here.

Playing around with the dummy command (substituting a shell script,
sprinkling '| tee -a logfile' into the code, ...) revealed that indeed
the desired text output is generated but somehow gets discarded. Perhaps
the monitoring user or even the whole system is subtly broken, but given
that there are ~400 similiarily setup systems (all using the same
workflow/automatisms for deploying the monitoring infrastructure) I was
starting to wonder how that might have happened ...

However, it got weirder: if I strace the nrpe process, everything works
as desired:

root@vserv08:/# strace -f -o /root/log -p 7215

And then in another terminal:

root@vserv08:/# /usr/lib/nagios/plugins/check_nrpe -H 127.0.0.1 -c dummy
OK: success

Logged as follows:

Oct  8 15:21:57 vserv08 nrpe[7240]: Connection from 127.0.0.1 port 37275
Oct  8 15:21:57 vserv08 nrpe[7240]: Host address is in allowed_hosts
Oct  8 15:21:57 vserv08 nrpe[7240]: Handling the connection...
Oct  8 15:21:57 vserv08 nrpe[7240]: Host is asking for command 'dummy' to be 
run...
Oct  8 15:21:57 vserv08 nrpe[7240]: Running command: 
/usr/lib/nagios/plugins/check_dummy 0 success
Oct  8 15:21:57 vserv08 nrpe[7240]: Command completed with return code 0 and 
output: OK: success
Oct  8 15:21:57 vserv08 nrpe[7240]: Return Code: 0, Output: OK: success
Oct  8 15:21:57 vserv08 nrpe[7240]: Connection from 127.0.0.1 closed.

I found no further hints in the strace log, but this led me to assume
that there is some NRPE weirdness involved, and thus I'm writing here
instead of further digging through the system.

Any ideas?

Cheers,
Flo

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Re: [Nagios-users] nrpe on ssl

[vishesh kumar]

Thanks to all. I verified through tcpdump and its over ssl

On Fri, May 25, 2012 at 5:33 AM, Tom Yates  wrote:

> On Thu, 24 May 2012, Axel wrote:
>
> > You can use tcpdump and wireshark to check the tcp and ssl handshake.
>
> as axel says, this is the best way to be *sure* it's happening under cover
> of SSL.  in case you want to see it done, here's one happening under SSL:
>
> [user@www ~]$ sudo tcpdump -n -n -A port 5666
> tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
> listening on eth0, link-type EN10MB (Ethernet), capture size 96 bytes
> 10:23:11.568787 IP 78.31.111.49.45411 > 193.219.118.100.5666: S
> 1958463879:1958463879(0) win 14600  0,nop,wscale 5>
> E..<..@.9.jvN.o1..vd.c."t.9..w.
> ..(2
> 10:23:11.568816 IP 193.219.118.100.5666 > 78.31.111.49.45411: S
> 4064423968:4064423968(0) ack 1958463880 win 5792  3184336621 318187570,nop,wscale 7>
> E..<..@.@.E,..vdN.o1.".c.B0 t..
> ..(2
> 10:23:11.574693 IP 78.31.111.49.45411 > 193.219.118.100.5666: . ack 1 win
> 457 
> E..4..@.9.j}N.o1..vd.c."tB0!?Q.
> ..(3
> 10:23:11.575019 IP 78.31.111.49.45411 > 193.219.118.100.5666: P 1:78(77)
> ack 1 win 457 
> E.@.9.j/N.o1..vd.c."tB0!...
> ..(3H...D..O.OH...`+.%.Kp.gOG.
> 10:23:11.575036 IP 193.219.118.100.5666 > 78.31.111.49.45411: . ack 78 win
> 46 
> E..4..@.@..b..vdN.o1.".c.B0!t...@..
> ..(3
> 10:23:11.576362 IP 193.219.118.100.5666 > 78.31.111.49.45411: P 1:240(239)
> ack 78 win 46 
> E..#..@.@..r..vdN.o1.".c.B0!t...z9.
> ..(3Q...M..O.O.f...F..Xc:..3h~
> 10:23:11.581549 IP 78.31.111.49.45411 > 193.219.118.100.5666: . ack 240
> win 490 
> E..4..@.9.j{N.o1..vd.c."tB1.=..
> ..(4
>
> as you can see, the ASCII-rendered contents look like gibberish.  here's
> one *not* happening under SSL:
>
> [user@www ~]$ sudo tcpdump -n -n -A port 5666
> tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
> listening on eth0, link-type EN10MB (Ethernet), capture size 96 bytes
> 10:27:50.403064 IP 78.31.111.49.45449 > 193.219.118.100.5666: S
> 2022207245:2022207245(0) win 14600  0,nop,wscale 5>
> ..9d..."x.o
> 
> 10:27:50.403095 IP 193.219.118.100.5666 > 78.31.111.49.45449: S
> 1624596014:1624596014(0) ack 2022207246 win 5792  3184615495 318215453,nop,wscale 7>
> E..<..@.@.E,..vdN.o1."..`.^.x.o..L.
> ..`G
> 10:27:50.408395 IP 78.31.111.49.45449 > 193.219.118.100.5666: . ack 1 win
> 457 
> E..4..@.9.R"N.o1..vd..."x.o.`.^/J..
> ..`G
> 10:27:50.409395 IP 78.31.111.49.45449 > 193.219.118.100.5666: P
> 1:1037(1036) ack 1 win 457 
> E..@..@.9.N.N.o1..vd..."x.o.`.^/:..
> ..`Gi7check_mysql.
> 10:27:50.410281 IP 193.219.118.100.5666 > 78.31.111.49.45449: . ack 1037
> win 62 
> E..4>b@.@.vdN.o1."..`.^/x.s>Hf.
> ..`N
> 10:27:50.427262 IP 193.219.118.100.5666 > 78.31.111.49.45449: P
> 1:1037(1036) ack 1037 win 62 
> E..@>c@.@.vdN.o1."..`.^/x.s>^..
> ..`_d=.d..QUERY OK: 'select *
>
> note the name of the check (check_mysql) and the result (QUERY OK...)
> being passed back in plaintext.
>
>
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Re: [Nagios-users] nrpe on ssl

[Tom Yates]

On Thu, 24 May 2012, Axel wrote:

> You can use tcpdump and wireshark to check the tcp and ssl handshake.

as axel says, this is the best way to be *sure* it's happening under cover 
of SSL.  in case you want to see it done, here's one happening under SSL:

[user@www ~]$ sudo tcpdump -n -n -A port 5666
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth0, link-type EN10MB (Ethernet), capture size 96 bytes
10:23:11.568787 IP 78.31.111.49.45411 > 193.219.118.100.5666: S 
1958463879:1958463879(0) win 14600 
E..<..@.9.jvN.o1..vd.c."t.9..w.
..(2
10:23:11.568816 IP 193.219.118.100.5666 > 78.31.111.49.45411: S 
4064423968:4064423968(0) ack 1958463880 win 5792 
E..<..@.@.E,..vdN.o1.".c.B0 t..
..(2
10:23:11.574693 IP 78.31.111.49.45411 > 193.219.118.100.5666: . ack 1 win 457 

E..4..@.9.j}N.o1..vd.c."tB0!?Q.
..(3
10:23:11.575019 IP 78.31.111.49.45411 > 193.219.118.100.5666: P 1:78(77) ack 1 
win 457 
E.@.9.j/N.o1..vd.c."tB0!...
..(3H...D..O.OH...`+.%.Kp.gOG.
10:23:11.575036 IP 193.219.118.100.5666 > 78.31.111.49.45411: . ack 78 win 46 

E..4..@.@..b..vdN.o1.".c.B0!t...@..
..(3
10:23:11.576362 IP 193.219.118.100.5666 > 78.31.111.49.45411: P 1:240(239) ack 
78 win 46 
E..#..@.@..r..vdN.o1.".c.B0!t...z9.
..(3Q...M..O.O.f...F..Xc:..3h~
10:23:11.581549 IP 78.31.111.49.45411 > 193.219.118.100.5666: . ack 240 win 490 

E..4..@.9.j{N.o1..vd.c."tB1.=..
..(4

as you can see, the ASCII-rendered contents look like gibberish.  here's 
one *not* happening under SSL:

[user@www ~]$ sudo tcpdump -n -n -A port 5666
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth0, link-type EN10MB (Ethernet), capture size 96 bytes
10:27:50.403064 IP 78.31.111.49.45449 > 193.219.118.100.5666: S 
2022207245:2022207245(0) win 14600 
..9d..."x.o

10:27:50.403095 IP 193.219.118.100.5666 > 78.31.111.49.45449: S 
1624596014:1624596014(0) ack 2022207246 win 5792 
E..<..@.@.E,..vdN.o1."..`.^.x.o..L.
..`G
10:27:50.408395 IP 78.31.111.49.45449 > 193.219.118.100.5666: . ack 1 win 457 

E..4..@.9.R"N.o1..vd..."x.o.`.^/J..
..`G
10:27:50.409395 IP 78.31.111.49.45449 > 193.219.118.100.5666: P 1:1037(1036) 
ack 1 win 457 
E..@..@.9.N.N.o1..vd..."x.o.`.^/:..
..`Gi7check_mysql.
10:27:50.410281 IP 193.219.118.100.5666 > 78.31.111.49.45449: . ack 1037 win 62 

E..4>b@.@.vdN.o1."..`.^/x.s>Hf.
..`N
10:27:50.427262 IP 193.219.118.100.5666 > 78.31.111.49.45449: P 1:1037(1036) 
ack 1037 win 62 
E..@>c@.@.vdN.o1."..`.^/x.s>^..
..`_d=.d..QUERY OK: 'select *

note the name of the check (check_mysql) and the result (QUERY OK...) 
being passed back in plaintext.


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Re: [Nagios-users] nrpe on ssl

[Axel]

You can use tcpdump and wireshark to check the tcp and ssl handshake.

Regards, Axel

Am 24.05.2012 15:43, schrieb vishesh kumar:
> Hi Members,
>
> I am new to this list and nagios.
>
> I want to know how i can verify that nagios nrpe_check connecting to
> nrpe daemon via ssl .
>
>
> Thanks
> Vishesh Kumar
>
>
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Re: [Nagios-users] nrpe on ssl

[Ismael Puerto]

  
  
Hi Vishesh

check_nrpe default run over SSL. If you want run check_nrpe without
SSL, you should add options "-n". 
example: check_nrpe -n -H hostname

Best Regards

On 05/24/2012 03:43 PM, vishesh kumar wrote:
Hi Members,
  
  
  I am new to this list and nagios.
  
  
  I want to know how i can verify that nagios nrpe_check
connecting to nrpe daemon via ssl .
  
  
  
  
  Thanks
  Vishesh Kumar
  
  
  
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Re: [Nagios-users] nrpe on ssl

[Scott Wilkerson]

Vishesh,

The current default for NRPE is to use SSL.  Additionally, you can 
specify allowed_hosts and the NRPE will only accept connection from the 
allowed hosts.


Scott Wilkerson
Technical Support Specialist
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On 5/24/2012 8:43 AM, vishesh kumar wrote:
> Hi Members,
>
> I am new to this list and nagios.
>
> I want to know how i can verify that nagios nrpe_check connecting to
> nrpe daemon via ssl .
>
>
> Thanks
> Vishesh Kumar
>
>
> --
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>
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[Nagios-users] nrpe on ssl

[vishesh kumar]

Hi Members,

I am new to this list and nagios.

I want to know how i can verify that nagios nrpe_check connecting to nrpe
daemon via ssl .


Thanks
Vishesh Kumar
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Re: [Nagios-users] NRPE and IPv6

[Thomas Pries]

Hi,

Am 26.02.2012 14:45, schrieb Jens Link:
>> ... problem with NRPE. It seems, that nrpe does
>> not support IPv6.
>
> True, at least for the nagios version of nrpe. Take a look at the nrpe
> version that comes with Icinga.

I searched the Icinga website but I didn't find any useful, except the 
information "Plugins are not distributed with Icinga".

Do you have a link to the plugin you mentioned?

Thomas


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Re: [Nagios-users] NRPE allowed_hosts directive

[C. Bensend]

> tried putting the IP addresses of all the hosts in the network. However,
> when I assign this variable to all the IP addresses (which is very long),

U...  Just how many Nagios servers do you HAVE?

That configuration option is to list the Nagios servers that will
be polling your NRPE daemon, not "all the hosts in the network".

Just wanted to make sure you're understanding the option correctly...

Benny


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[Nagios-users] NRPE allowed_hosts directive

[Wadud Miah (ITCS)]

Hello,

I am using NRPE version 2.7 and want to configured the allowed_hosts directive 
so that it can take a network address in the form network_address/netmask. 
However, it doesn't seem to support this, so I tried putting the IP addresses 
of all the hosts in the network. However, when I assign this variable to all 
the IP addresses (which is very long), I get this error:

Feb 29 10:49:30 cn004 nrpe[22540]: No variable value specified in config file 
'/etc/nagios/nrpe.cfg' - Line 65
Feb 29 10:49:30 cn004 nrpe[22540]: Config file '/etc/nagios/nrpe.cfg' contained 
errors, aborting...

When I truncate a number of IP addresses, it works fine. Do you know if the 
newer version of NRPE resolves this issue? Namely, can it accept network 
addresses (network_address/netmask) and/or take a long list of IP addresses? 
The former will be more convenient.

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Re: [Nagios-users] NRPE and IPv6

[Thomas Pries]

Hi,

Am 27.02.2012 02:44, schrieb Robert V. Bolton:
> There is no need to patch Nagios to support and IPv6 address variable.
> You can just use a custom object variable. In fact this is the preferred
> way to do it. http://nagios.sourceforge.net/docs/3_0/customobjectvars.html

Thanks for the infos, but if I understand the mentioned docs right, the 
custom object variables will not solve my problem.

My problem is, I define a host with "address 2001:." and I got 
"Invalid host name '2001:..." from check_nrpe.

I guess, whatever variable I take to handover the IPv6 to check_nrpe, 
check_nrpe will still be unable to use the IPv6 to access the host, right?

Kind regards
Thomas

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Re: [Nagios-users] NRPE and IPv6

[Robert V. Bolton]

There is no need to patch Nagios to support and IPv6 address variable. You
can just use a custom object variable. In fact this is the preferred way to
do it. http://nagios.sourceforge.net/docs/3_0/customobjectvars.html

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Re: [Nagios-users] NRPE and IPv6

[Jens Link]

Thomas Pries  writes:

> Ok, that is, what I am thinking about, why using nagios when Icinga
> provides the better tools. May be, Icinga is the more innovative
> approch. I am at the beginning and I don't have to take care of
> existing things.

Icinga also has an address6 type for hosts. This makes life in dual
stacked environment quite easy. There is a patch for Nagios but I don't
think it is in the regular code base.

Jens
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Re: [Nagios-users] NRPE and IPv6

[Thomas Pries]

Hi,

Am 26. Februar 2012 14:45 schrieb Jens Link :

> Thomas Pries  writes:
>
> > ... It seems, that nrpe does
> > not support IPv6.
>
> True, at least for the nagios version of nrpe. Take a look at the nrpe
> version that comes with Icinga
>

Ok, that is, what I am thinking about, why using nagios when Icinga
provides the better tools. May be, Icinga is the more innovative approch. I
am at the beginning and I don't have to take care of existing things.
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Re: [Nagios-users] NRPE and IPv6

[Jens Link]

Thomas Pries  writes:

> Hi,
>
> I started monitoring my infrastructure with nagios. I just begun
> dealing with these thing and my first steps were promising, but now I
> am facing a very basic problem with NRPE. It seems, that nrpe does
> not support IPv6. 

True, at least for the nagios version of nrpe. Take a look at the nrpe
version that comes with Icinga.

Jens
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[Nagios-users] NRPE and IPv6

[Thomas Pries]

Hi,

I started monitoring my infrastructure with nagios. I just begun dealing
with these thing and my first steps were promising, but now I am facing a
very basic problem with NRPE. It seems, that nrpe does not support IPv6. I
can't belief that, I suppose, I read the wrong docs and pages, in the
mailarchive I found some informations about some inofficial patches, but
this can't be all.

Is that true, NRPE does not support IPv6?


Kind Regards
Thomas
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Re: [Nagios-users] NRPE/NSClient++ CheckCPU Error?

[Matthew Jurgens]

Just dropping this as a note for the mailing list .

It turned out that using versions of perl modules older than the 
recommended ones was the cause of the problem - specifically 
Config::Inifiles


However, the new version of Check WMI Plus (v1.50), works around the 
limitations of the older module.


On 1/02/2012 5:45 PM, Robert Jackson wrote:


Hi Matthew,

Create new blank check_wmi_plus.ini (chown --R Nagios:Nagios 
check_wmi_plus.ini to allocate permissions). Ran the command as 'root' 
from a command prompt:


/usr/lib/nagios/plugins/check_wmi_plus.pl -H wm-tsrv2 -u 'nagios-wmi' 
-p 'wmicheck' -m checkts -s sessions2003 --d -z


Result output is:

Command Line (v1.49): /usr/lib/nagios/plugins/check_wmi_plus.pl -H 
wm-tsrv2 -u nagios-wmi -p wmicheck -m checkts -s sessions2003 -d -z


Conf File Dir: /usr/lib/nagios/plugins/edcint

Loaded Conf File /usr/lib/nagios/plugins/edcint/check_wmi_plus.conf

Opening Ini Files ...

   opening first ini file: 
/usr/lib/nagios/plugins/edcint/check_wmi_plus.d/check_wmi_plus.ini


   checking ini dir /usr/lib/nagios/plugins/edcint/check_wmi_plus.d, 
found 1 file(s)


   opening first ini file: check_wmi_plus.ini

INIFILE and/or INIDIR are set but there were no ini file(s) or an 
error occurred trying to read them.


A valid MODE and/or SUBMODE must be specified

Typical Usage: -H HOSTNAME -u DOMAIN/USER -p PASSWORD -m MODE [-s 
SUBMODE] [-a ARG1 ] [-w WARN] [-c CRIT]


Full Usage: -H HOSTNAME -u DOMAIN/USER -p PASSWORD -m MODE [-s 
SUBMODE] [-b BYTEFACTOR] [-w WARN] [-c CRIT] [-a ARG1 ] [-o ARG2] [-3 
ARG3] [-4 ARG4] [-t TIMEOUT] [-y DELAY] [--namespace WMINAMESPACE] 
[--nodatamode] [--nodataexit NODATAEXIT] [--nodatastring NODATASTRING] 
[-d] [-z] [--inifile=INIFILE] [--inidir=INIDIR] [--inihelp] 
[--nokeepstate] [--keepexpiry KEXPIRY] [--keepid KID] [-v OSVERSION] 
[--help] [--itexthelp]


Help as a Manpage: --help

Help as Text: --itexthelp

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Re: [Nagios-users] nrpe ssh handshake error

[Werner Flamme]

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

Manish Kumar [07.02.2012 19:57]:

> The details of the issue is below:-
> 
> *When nrpe service on HP-UX started using this command: *
> 
> /usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg -d
> 
> 
> *And from nagiosXI server:*
> 
> [root@mmkndnagxi libexec]# ./check_nrpe -H 10.204.100.74 -n -p 5667
> -c check_mem -a '-w 65 -c 75'
> 
> CHECK_NRPE: Socket timeout after 10 seconds.

Does the nrpe daemon listen on port 5667? On our installations, it
listens on 5666. On linux, I can check this with the netstat command
(on the server) or with nmap (from remote), but I don't know about
HP-UX's means.


> *When nrpe service on HP-UX started using this command: *
> 
> /usr/local/nagios/bin/nrpe -n -c /usr/local/nagios/etc/nrpe.cfg -d
> 
> 
> *And from nagiosXI server:*
> 
> [root@mmkndnagxi libexec]# ./check_nrpe -H 10.204.100.73 -t 60 -p
> 5667 -c check_mem -a '-w 65 -c 75'
> 
> CHECK_NRPE: Error - Could not complete SSL handshake.

If you tell the server not to use SSL (with the -n option), you should
tell it the client too (by using ./check_nrpe -H 10.204.100.73 -n -t
...). And... does the server listen to port 5667? ;-)

HTH
Werner
-BEGIN PGP SIGNATURE-
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Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/

iEYEARECAAYFAk8ykNQACgkQk33Krq8b42NUigCdHLmXqE6W+Vayjc6xqK4RO43u
Kk8AnRoDNcUE3/4CdIRRDrhOcTPoCnJZ
=TTcA
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Re: [Nagios-users] nrpe ssh handshake error

[Mark Elsen]

> Dear List,
>
>
>
> I am monitoring some HP-UX servers on which we have installed nrpe. It was
> working fine until from last few days it started giving SSL handshake error.
> I have checked nrpe.cfg and it is perfectly fine. The nrpe on HP-UX has been
> started from commandline on the HP-UX servers.
>
>
>
> I have tried the following options from my NagiosXI server.
>
>
>
> [root@nagxi libexec]# ./check_nrpe -H x.x.x.x -c check_disk -a '-w 10% -c 5%
> -p /home'
>
> CHECK_NRPE: Socket timeout after 10 seconds.
>
>
>
>
>
>
>
> [root@nagxi libexec]# ./check_nrpe -H x.x.x.x -t 90 -c check_disk -a '-w 10%
> -c 5% -p /home'
>
> CHECK_NRPE: Error - Could not complete SSL handshake.
>
>
>
>
>
> [root@nagxi libexec]# ./check_nrpe -H x.x.x.x -n -c check_disk -a '-w 10% -c
> 5% -p /home'
>
> CHECK_NRPE: Socket timeout after 10 seconds.
>
>
>
> [root@nagxi libexec]# ./check_nrpe -H x.x.x.x -n -t 20 -c check_disk -a '-w
> 10% -c 5% -p /home'
>
> CHECK_NRPE: Socket timeout after 20 seconds.
>
>
>

  - Socket timeout means that the service is unreachable or down
(agaIn)  ; Check


 # grep -i nrpe /var/adm/syslog.log   on HPUX

M.

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[Nagios-users] nrpe ssh handshake error

[Manish_Kmr]

Dear List,

I am monitoring some HP-UX servers on which we have installed nrpe. It was 
working fine until from last few days it started giving SSL handshake error. I 
have checked nrpe.cfg and it is perfectly fine. The nrpe on HP-UX has been 
started from commandline on the HP-UX servers.

I have tried the following options from my NagiosXI server.

[root@nagxi libexec]# ./check_nrpe -H x.x.x.x -c check_disk -a '-w 10% -c 5% -p 
/home'
CHECK_NRPE: Socket timeout after 10 seconds.



[root@nagxi libexec]# ./check_nrpe -H x.x.x.x -t 90 -c check_disk -a '-w 10% -c 
5% -p /home'
CHECK_NRPE: Error - Could not complete SSL handshake.


[root@nagxi libexec]# ./check_nrpe -H x.x.x.x -n -c check_disk -a '-w 10% -c 5% 
-p /home'
CHECK_NRPE: Socket timeout after 10 seconds.

[root@nagxi libexec]# ./check_nrpe -H x.x.x.x -n -t 20 -c check_disk -a '-w 10% 
-c 5% -p /home'
CHECK_NRPE: Socket timeout after 20 seconds.



Thanks,
Manish
Open Source Tools Team, IMS, Mahindra Satyam
Mob: +919035435306




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Re: [Nagios-users] nrpe ssl handshake error

[Mark Elsen]

> Hi,
>
> In nrpe.cfg only_from has my nagios server IP Address. What else can i check
> for this issue.
>

 - Check the equivalent of /var/log/messages on HP-UX. I think it is
/usr/adm/syslog
Grep on nrpe (error) messages if any.

M.

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Re: [Nagios-users] nrpe ssl handshake error

[Manish Kumar]

Hi,

In nrpe.cfg only_from has my nagios server IP Address. What else can i
check for this issue.

On Mon, Feb 6, 2012 at 2:25 AM, James Osbourn wrote:

> On our hosts the NRPE inetd/xinetd config has a line which says
>
> ** **
>
> only_from = 
>
> ** **
>
> If this IP address list does not match you connecting server then it will
> not work and give you this error, always catches me out.
>
> ** **
>
> Jamees
>
> ** **
>
> *From:* Manish Kumar [mailto:manikuma...@gmail.com]
> *Sent:* 05 February 2012 17:19
> *To:* nagios-users
> *Subject:* [Nagios-users] nrpe ssl handshake error
>
> ** **
>
> Hi List,
>
> ** **
>
> The nrpe service on some of my HP-UX machines started giving ssl handshake
> error.  I am able to telnet into port 5666 of these machines and i have
> restarted the nrpe service on these machines. What can be the issue ???
> 
>
> ** **
>
> --
> Thanks
> Manish Kumar
> http://in.linkedin.com/in/manishkumar85
>
>
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Re: [Nagios-users] nrpe ssl handshake error

[James Osbourn]

On our hosts the NRPE inetd/xinetd config has a line which says

only_from = 

If this IP address list does not match you connecting server then it will not 
work and give you this error, always catches me out.

Jamees

From: Manish Kumar [mailto:manikuma...@gmail.com]
Sent: 05 February 2012 17:19
To: nagios-users
Subject: [Nagios-users] nrpe ssl handshake error

Hi List,

The nrpe service on some of my HP-UX machines started giving ssl handshake 
error.  I am able to telnet into port 5666 of these machines and i have 
restarted the nrpe service on these machines. What can be the issue ???

--
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http://in.linkedin.com/in/manishkumar85
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[Nagios-users] nrpe ssl handshake error

[Manish Kumar]

Hi List,

The nrpe service on some of my HP-UX machines started giving ssl handshake
error.  I am able to telnet into port 5666 of these machines and i have
restarted the nrpe service on these machines. What can be the issue ???

-- 
Thanks
Manish Kumar
http://in.linkedin.com/in/manishkumar85
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Re: [Nagios-users] NRPE/NSClient++ CheckCPU Error?

[Claudio Kuenzler]

In the NSClient++ documentation, CheckCPU works with normal integers as
thresholds (so no %-sign required).

As an alternative, you can also check the CPU Utilization with the
NSClientListener/check_nt plugin:
http://nsclient.org/nscp/wiki/NSClientListener

I use this way of checking the cpu loads/percentages for several hundreds
of Windows servers and it works just fine.

On Mon, Jan 30, 2012 at 12:06 PM, Matthew Jurgens
wrote:

>  You might like to try
>
> www.edcint.co.nz/checkwmiplus
>
>
> On 30/01/2012 9:07 PM, Robert Jackson wrote:
>
>  Why does the NSClient++ command CheckCPU always sit as a critical
> condition within Nagios? The command I have in place is:
>
> ** **
>
> $USER1$/check_nrpe -H $HOSTADDRESS$ -c CheckCPU -a warn=$ARG1$ crit=$ARG2$
> time=5m
>
> ** **
>
> $ARG1$ is set to 80%  and $ARG2$ is set to 95% (have tried with and
> without % symbol)
>
> ** **
>
> The output display in Nagios is: CRITICAL: 5m: average load 15% > critical
> 
>
> ** **
>
> Anyone have any ideas why this is generating a critical condition?
>
> ** **
>
> Regards,
>
> Rab.
>
> =
>
> Robert Jackson  Phone: +44 (0) 141 332 7999
> 
>
> IT Manager   Fax: +44 (0) 141 331
> 2820
>
> Walker Martyn Ltd
>
> 1 Park Circus PlaceEmail:
> r...@walkermartyn.co.uk
>
> Glasgow G3 6AH, Scotland   Web:
> http://www.walkermartyn.co.uk
>
> =
>
>
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Re: [Nagios-users] NRPE/NSClient++ CheckCPU Error?

[Matthew Jurgens]

You might like to try

www.edcint.co.nz/checkwmiplus

On 30/01/2012 9:07 PM, Robert Jackson wrote:


Why does the NSClient++ command CheckCPU always sit as a critical 
condition within Nagios? The command I have in place is:


$USER1$/check_nrpe -H $HOSTADDRESS$ -c CheckCPU -a warn=$ARG1$ 
crit=$ARG2$ time=5m


$ARG1$ is set to 80%  and $ARG2$ is set to 95% (have tried with and 
without % symbol)


The output display in Nagios is: CRITICAL: 5m: average load 15% > critical

Anyone have any ideas why this is generating a critical condition?

Regards,

Rab.

=

Robert Jackson  Phone: +44 (0) 141 332 
7999


IT Manager   Fax: +44 (0) 141 
331 2820


Walker Martyn Ltd

1 Park Circus PlaceEmail: 
r...@walkermartyn.co.uk 


Glasgow G3 6AH, Scotland   Web: 
http://www.walkermartyn.co.uk 


=



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[Nagios-users] NRPE/NSClient++ CheckCPU Error?

[Robert Jackson]

Why does the NSClient++ command CheckCPU always sit as a critical
condition within Nagios? The command I have in place is:



$USER1$/check_nrpe -H $HOSTADDRESS$ -c CheckCPU -a warn=$ARG1$
crit=$ARG2$ time=5m



$ARG1$ is set to 80%  and $ARG2$ is set to 95% (have tried with and
without % symbol)



The output display in Nagios is: CRITICAL: 5m: average load 15% >
critical



Anyone have any ideas why this is generating a critical condition?



Regards,

Rab.

=

Robert Jackson  Phone: +44 (0) 141 332
7999

IT Manager   Fax: +44 (0) 141
331 2820

Walker Martyn Ltd

1 Park Circus PlaceEmail:
r...@walkermartyn.co.uk 

Glasgow G3 6AH, Scotland   Web:
http://www.walkermartyn.co.uk 

=







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Re: [Nagios-users] NRPE Woes Monitoring Windows Servers

[Nick Price]

Hi


You need to check the following is uncommented

allow_arguments and it should = 1

port=5666 if you are using NRPE
port=12489

did you also add allowed_hosts=   you need to add here the Nagios server IP
address

hope this helps

Nick



-Original Message-
From: Robert Jackson [mailto:r...@walkermartyn.co.uk] 
Sent: Sunday, January 29, 2012 10:53
To: Nagios Users List
Subject: Re: [Nagios-users] NRPE Woes Monitoring Windows Servers

Sorry about the lack of info:

I've turned on log debugging and it produced the following:

2012-01-29 09:39:03: debug:NSClient++.cpp:1106: Injecting: CheckVersion: 
2012-01-29 09:39:03: debug:NSClient++.cpp:1142: Injected Result: OK
'0.3.8.75 2010-05-27'
2012-01-29 09:39:03: debug:NSClient++.cpp:1143: Injected Performance Result:
''
2012-01-29 09:39:15: error:modules\NRPEListener\NRPEListener.cpp:393:
Request contained arguments (not currently allowed, check the
allow_arguments option).
2012-01-29 09:39:15: error:modules\NRPEListener\NRPEListener.cpp:365:
NRPEException: Request contained arguments (not currently allowed, check the
allow_arguments option).

In the above case the Nagios command issued was:

./check_nrpe -H  -p 5666 -c CheckUpTime -a MinWarn=1d MinCrit=12h

I'm aiming to get to a point where for all Windows machines (Servers and
PCs) I have a default check template of:

NSClient++ version
Uptime
CPU Load
Memory Usage
Disk Usage (all partitions)
Explorer process is running.

In the NSC.ini file, the following have all been uncomment:

FileLogger.dll
CheckSystem.dll
CheckDisk.dll
NSClientListener.dll
NRPEListener.dll
SysTray.dll
CheckEventLog.dll
CheckHelpers.dll
CheckWMI.dll
;
; Script to check external scripts and/or internal aliases.
CheckExternalScripts.dll

Also:

allowed_hosts=



Regards,
Rab.
=
Robert Jackson  Phone: +44 (0) 141 332 7999
IT Manager   Fax: +44 (0) 141 331
2820
Walker Martyn Ltd
1 Park Circus PlaceEmail: r...@walkermartyn.co.uk
Glasgow G3 6AH, Scotland   Web:
http://www.walkermartyn.co.uk
=





-Original Message-
From: Jim Avery [mailto:j...@jimavery.me.uk]
Sent: Saturday 28 January 2012 19:21
To: Nagios Users List
Subject: Re: [Nagios-users] NRPE Woes Monitoring Windows Servers

On 28 January 2012 15:52, Robert Jackson  wrote:
> Hope someone can point me in the right direction. For any  check_nrpe 
> command (except CheckVersion) I get the following:
>
>
>
> CHECK_NRPE: Received 0 bytes from daemon. Check the remote server logs 
> for error messages.
>
>
>
> I know this is a bit sketchy

Yes, it is rather.

>, but I don't understand why the CheckVersion  command would work and 
>anything else won't. I'm assuming here that because I  get the version 
>of the NSClient++ returned without error, then NSClient++ is  
>configured correctly? I have uncommented the necessary modules within 
>the  NSC.ini files on the Windows server.

> I've tried both CheckMEM and CheckUptime with no success. Can someone 
> please help?

Does the nsclient.log file contain anything interesting?

There are umpteen ways to configure NSClient++ and run checks against it.
What specific checks are you trying to run and how are you running them?


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Ltd or any of its affiliates. If you are not the intended recipient please
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Walker Martyn Ltd, company number SC197533. Company is registered in
Scotland and has its registered office at 1 Park Circus Place, Glasgow G3
6AH, UK.





--

Re: [Nagios-users] NRPE Woes Monitoring Windows Servers

[Robert Jackson]

Sorry about the lack of info:

I've turned on log debugging and it produced the following:

2012-01-29 09:39:03: debug:NSClient++.cpp:1106: Injecting: CheckVersion: 
2012-01-29 09:39:03: debug:NSClient++.cpp:1142: Injected Result: OK '0.3.8.75 
2010-05-27'
2012-01-29 09:39:03: debug:NSClient++.cpp:1143: Injected Performance Result: ''
2012-01-29 09:39:15: error:modules\NRPEListener\NRPEListener.cpp:393: Request 
contained arguments (not currently allowed, check the allow_arguments option).
2012-01-29 09:39:15: error:modules\NRPEListener\NRPEListener.cpp:365: 
NRPEException: Request contained arguments (not currently allowed, check the 
allow_arguments option).

In the above case the Nagios command issued was:

./check_nrpe -H  -p 5666 -c CheckUpTime -a MinWarn=1d MinCrit=12h

I'm aiming to get to a point where for all Windows machines (Servers and PCs) I 
have a default check template of:

NSClient++ version
Uptime
CPU Load
Memory Usage
Disk Usage (all partitions)
Explorer process is running.

In the NSC.ini file, the following have all been uncomment:

FileLogger.dll
CheckSystem.dll
CheckDisk.dll
NSClientListener.dll
NRPEListener.dll
SysTray.dll
CheckEventLog.dll
CheckHelpers.dll
CheckWMI.dll
;
; Script to check external scripts and/or internal aliases.
CheckExternalScripts.dll

Also:

allowed_hosts=



Regards,
Rab.
=
Robert Jackson  Phone: +44 (0) 141 332 7999
IT Manager   Fax: +44 (0) 141 331 2820
Walker Martyn Ltd
1 Park Circus PlaceEmail: r...@walkermartyn.co.uk
Glasgow G3 6AH, Scotland   Web: http://www.walkermartyn.co.uk
=





-Original Message-
From: Jim Avery [mailto:j...@jimavery.me.uk] 
Sent: Saturday 28 January 2012 19:21
To: Nagios Users List
Subject: Re: [Nagios-users] NRPE Woes Monitoring Windows Servers

On 28 January 2012 15:52, Robert Jackson  wrote:
> Hope someone can point me in the right direction. For any  check_nrpe
> command (except CheckVersion) I get the following:
>
>
>
> CHECK_NRPE: Received 0 bytes from daemon. Check the remote server logs for
> error messages.
>
>
>
> I know this is a bit sketchy

Yes, it is rather.

>, but I don't understand why the CheckVersion
> command would work and anything else won't. I'm assuming here that because I
> get the version of the NSClient++ returned without error, then NSClient++ is
> configured correctly? I have uncommented the necessary modules within the
> NSC.ini files on the Windows server.

> I've tried both CheckMEM and CheckUptime with no success. Can someone please
> help?

Does the nsclient.log file contain anything interesting?

There are umpteen ways to configure NSClient++ and run checks against it.
What specific checks are you trying to run and how are you running them?

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by anyone else is unauthorised. Any views or opinions presented are
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Walker Martyn Ltd or any of its affiliates. If you are not the
intended recipient please contact  administra...@walkermartyn.co.uk

Walker Martyn Ltd, company number SC197533. Company is 
registered in Scotland and has its registered office at 1 Park
Circus Place, Glasgow G3 6AH, UK.





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Re: [Nagios-users] NRPE Woes Monitoring Windows Servers

[Jim Avery]

On 28 January 2012 15:52, Robert Jackson  wrote:
> Hope someone can point me in the right direction. For any  check_nrpe
> command (except CheckVersion) I get the following:
>
>
>
> CHECK_NRPE: Received 0 bytes from daemon. Check the remote server logs for
> error messages.
>
>
>
> I know this is a bit sketchy

Yes, it is rather.

>, but I don’t understand why the CheckVersion
> command would work and anything else won’t. I’m assuming here that because I
> get the version of the NSClient++ returned without error, then NSClient++ is
> configured correctly? I have uncommented the necessary modules within the
> NSC.ini files on the Windows server.

> I’ve tried both CheckMEM and CheckUptime with no success. Can someone please
> help?

Does the nsclient.log file contain anything interesting?

There are umpteen ways to configure NSClient++ and run checks against it.
What specific checks are you trying to run and how are you running them?

--
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[Nagios-users] NRPE Woes Monitoring Windows Servers

[Robert Jackson]

Hope someone can point me in the right direction. For any  check_nrpe
command (except CheckVersion) I get the following:



CHECK_NRPE: Received 0 bytes from daemon. Check the remote server logs
for error messages.



I know this is a bit sketchy, but I don't understand why the
CheckVersion command would work and anything else won't. I'm assuming
here that because I get the version of the NSClient++ returned without
error, then NSClient++ is configured correctly? I have uncommented the
necessary modules within the NSC.ini files on the Windows server.



I've tried both CheckMEM and CheckUptime with no success. Can someone
please help?



Thanks.







The information in this internet E-mail is confidential and is intended
solely for the addressee. Access, copying or re-use of information in it
by anyone else is unauthorised. Any views or opinions presented are
solely those of the author and do not necessarily represent those of
Walker Martyn Ltd or any of its affiliates. If you are not the
intended recipient please contact  administra...@walkermartyn.co.uk

Walker Martyn Ltd, company number SC197533. Company is
registered in Scotland and has its registered office at 1 Park
Circus Place, Glasgow G3 6AH, UK.




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Re: [Nagios-users] nrpe install and start on sunos joyent

[Edwin Zoeller]

What version of Solaris are you running?
 

From: Marco Borsani [mailto:m.bors...@it.net] 
Sent: Tuesday, October 11, 2011 03:37 AM
To: NAGIOS  
Subject: [Nagios-users] nrpe install and start on sunos joyent 
 


Hello

 

I have to run NRPE client on several sunos systems, but I don’t know a lot that 
OS.

 

I met also many problems during the compiling..solved using the package 
precompiled and installed with “pkgin in nrpe…”

 

1)

I have prepared nrpe.xml 

2)

I started the service with “svcadm enable nrpe”, but in the error log I read:

 

[ Oct 11 08:26:30 Enabled. ]

[ Oct 11 08:26:30 Executing start method ("/opt/local/sbin/nrpe -c 
/opt/local/etc/nagios/nrpe.cfg -d"). ]

[ Oct 11 08:26:30 svc.startd could not set context for method:  ]

chdir: No such file or directory

[ Oct 11 08:26:30 Method "start" exited with status 96. ]

 

Any ideas?

Does anyone ever done this kind of installation ?

 

Regards

Marco

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[Nagios-users] nrpe install and start on sunos joyent

[Marco Borsani]

Hello

 

I have to run NRPE client on several sunos systems, but I don't know a lot
that OS.

 

I met also many problems during the compiling..solved using the package
precompiled and installed with "pkgin in nrpe."

 

1)

I have prepared nrpe.xml 

2)

I started the service with "svcadm enable nrpe", but in the error log I
read:

 

[ Oct 11 08:26:30 Enabled. ]

[ Oct 11 08:26:30 Executing start method ("/opt/local/sbin/nrpe -c
/opt/local/etc/nagios/nrpe.cfg -d"). ]

[ Oct 11 08:26:30 svc.startd could not set context for method:  ]

chdir: No such file or directory

[ Oct 11 08:26:30 Method "start" exited with status 96. ]

 

Any ideas?

Does anyone ever done this kind of installation ?

 

Regards

Marco

--
All the data continuously generated in your IT infrastructure contains a
definitive record of customers, application performance, security
threats, fraudulent activity and more. Splunk takes this data and makes
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Re: [Nagios-users] Nrpe and Windows

[Axel Rosenski]

> Thanks for the suggestions. I'll give check_wmi_plus consideration.
> 
> It's disappointing that nrpe is failing like this though. I'm only checking
> local disk usage using check_pdm.exe for the c: drive at the moment.

What's the advantage of check_pdm.exe? 
We use NSClient++ and check_nrpe to check a bunch of Windows server and 
it's working without any issues. 

Regards

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__
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Re: [Nagios-users] Nrpe and Windows

[Michael Medin]

Hello,

Which version of NRPE are you using?
NSClient++ is a fairly stable NRPE/NSCA/* client/server for Windows and 
Linux...

// Michael Medin

Deborah Martin skrev 2011-09-23 14:19:
> Folks,
>
> Thanks for the suggestions. I'll give check_wmi_plus consideration.
>
> It's disappointing that nrpe is failing like this though. I'm only checking 
> local disk usage using check_pdm.exe for the c: drive at the moment.
>
> We wouldn't be able to work with NRPE like this as once we have production 
> systems up and running nrpe (or whatever we decide to use) needs to reliable.
>
> Regards,
> Deborah
>
> -Original Message-
> From: Mark Elsen [mailto:mark.el...@gmail.com]
> Sent: 22 September 2011 15:51
> To: Nagios Users List
> Subject: Re: [Nagios-users] Nrpe and Windows
>
>> Folks,
>>
>>
>> Nagios 3.2.0 is running on SLES 10 SP 1 NRPE  running on Windows
>>
>> It all seems to work fine for a while (10 mins)  and then I start seeing 
>> socket timeout errors. The only way to fix this is to restart the nrpe 
>> service on the node that is being monitored.
>>
>> Has anyone else had this this happen and if so, what was the solution to 
>> this sort of problem ?
>   The problem is not 'standard' so to speak; check your windows server 
> eventlog (e.g,)(
>> Is nrpe the best way to monitor windows boxes or should I consider other 
>> options out there ?
>>
>>
>   You may consider agent less monitoring, I have been using it for a while, 
> google on
>
> check_wmi_plus
>
> M.
>
> --
> All the data continuously generated in your IT infrastructure contains a 
> definitive record of customers, application performance, security threats, 
> fraudulent activity and more. Splunk takes this data and makes sense of it. 
> Business sense. IT sense. Common sense.
> http://p.sf.net/sfu/splunk-d2dcopy1
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> solely for the use of the individual or entity to whom they are addressed. If 
> you are not the intended recipient, please delete this e-mail immediately. 
> Any unauthorised distribution or copying is strictly prohibited. Whilst 
> Kognitio endeavours to prevent the transmission of viruses via e-mail, we 
> cannot guarantee that any e-mail or attachment is free from computer viruses 
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Re: [Nagios-users] Nrpe and Windows

[Deborah Martin]

Folks, 

Thanks for the suggestions. I'll give check_wmi_plus consideration. 

It's disappointing that nrpe is failing like this though. I'm only checking 
local disk usage using check_pdm.exe for the c: drive at the moment. 

We wouldn't be able to work with NRPE like this as once we have production 
systems up and running nrpe (or whatever we decide to use) needs to reliable. 

Regards,
Deborah  

-Original Message-
From: Mark Elsen [mailto:mark.el...@gmail.com] 
Sent: 22 September 2011 15:51
To: Nagios Users List
Subject: Re: [Nagios-users] Nrpe and Windows

> Folks,
>
>
> Nagios 3.2.0 is running on SLES 10 SP 1 NRPE  running on Windows
>
> It all seems to work fine for a while (10 mins)  and then I start seeing 
> socket timeout errors. The only way to fix this is to restart the nrpe 
> service on the node that is being monitored.
>
> Has anyone else had this this happen and if so, what was the solution to this 
> sort of problem ?

 The problem is not 'standard' so to speak; check your windows server eventlog 
(e.g,)(
>
> Is nrpe the best way to monitor windows boxes or should I consider other 
> options out there ?
>
>

 You may consider agent less monitoring, I have been using it for a while, 
google on

   check_wmi_plus

M.

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definitive record of customers, application performance, security threats, 
fraudulent activity and more. Splunk takes this data and makes sense of it. 
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Re: [Nagios-users] Nrpe and Windows

[Kirill Bychkov]

Hello,

Have you tried to enable a logging nrpe?

What do you monitor in windows?



On 22 September 2011 18:00, Deborah Martin wrote:

> Folks,
>
>
> Nagios 3.2.0 is running on SLES 10 SP 1
> NRPE  running on Windows
>
> It all seems to work fine for a while (10 mins)  and then I start seeing
> socket timeout errors. The only way to fix this is to restart the nrpe
> service on the node that is being monitored.
>
> Has anyone else had this this happen and if so, what was the solution to
> this sort of problem ?
>
> Is nrpe the best way to monitor windows boxes or should I consider other
> options out there ?
>
> Any help / pointers / opinions would be really appreciated.
>
> Thanks,
> Deborah
>
> Attend complimentary seminar in New York City. Stop Dreaming make virtual
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Re: [Nagios-users] Nrpe and Windows

[Mark Elsen]

> Folks,
>
>
> Nagios 3.2.0 is running on SLES 10 SP 1
> NRPE  running on Windows
>
> It all seems to work fine for a while (10 mins)  and then I start seeing 
> socket timeout errors. The only way to fix this is to restart the nrpe 
> service on the node that is being monitored.
>
> Has anyone else had this this happen and if so, what was the solution to this 
> sort of problem ?

 The problem is not 'standard' so to speak; check your windows server
eventlog (e.g,)(
>
> Is nrpe the best way to monitor windows boxes or should I consider other 
> options out there ?
>
>

 You may consider agent less monitoring, I have been using it for a
while, google on

   check_wmi_plus

M.

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[Nagios-users] Nrpe and Windows

[Deborah Martin]

Folks, 


Nagios 3.2.0 is running on SLES 10 SP 1
NRPE  running on Windows 

It all seems to work fine for a while (10 mins)  and then I start seeing socket 
timeout errors. The only way to fix this is to restart the nrpe service on the 
node that is being monitored. 

Has anyone else had this this happen and if so, what was the solution to this 
sort of problem ? 

Is nrpe the best way to monitor windows boxes or should I consider other 
options out there ? 

Any help / pointers / opinions would be really appreciated. 

Thanks,
Deborah 

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[Nagios-users] nrpe, xinetd and LDAP problem

[up]

Hi:

I have been trying to track down the fix for this for a while.  We have a Nagios
server monitoring a few dozen servers.  Most of these servers authenticate users
against a separate (CentOS Directory Server).  We ONLY use LDAP for user/group
authentication.  It was configured via authconfig and even has a backup LDAP
server.

Whenever there is a problem with the primary LDAP server, all of the NRPE 
clients
timeout on their services.  Note that the "nagios" user and group exists in the
local auth files on all these servers...there is no need for NRPE or xinetd to 
use
LDAP:

Aug  2 12:03:18 client1 xinetd[32012]: nss_ldap: failed to bind to LDAP server
ldap://ldap1.domain.com/: Can't contact LDAP server
Aug  2 12:03:18 client1 xinetd[32012]: nss_ldap: reconnected to LDAP server
ldap://ldap2.domain.com/
Aug  2 12:03:18 client1 nrpe[32012]: Error: Could not complete SSL handshake. 5

The message then repeats in the log several times and we all get paged (texted)
hundreds of times :-(

I looked around and found that others have had this issue, but I don't see a 
fix. 
Is it an xinetd problem?  Should we run nrpe standalone?

Here was somebody else having a similar issue (except we don't have a
per_source_limit problem):

http://www.linuxquestions.org/questions/linux-server-73/nrpe-ldap-and-ssl-787246/

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Re: [Nagios-users] NRPE client issues

[Jim Avery]

On 20 July 2011 17:29, Julie S. Lin  wrote:
> Hi
>
> I am monitoring a windows box with very basic out of the box plugins
> using nsclient
>
> However, whenever we start using this box there is great load on this
> box
> (which is a server class machine)  and causes the nagios checks to time
> out and falsely page.
>
> Has any one run into this issue and how to resolve?

I come across this sort of thing more so with Unix test servers than Windows.

I expect the easiest way to resolve this would be to configure
NSClient++ to run the checks and send the results to Nagios using
nsca.  That way the agent will run them in its own sweet time and if
they are rather slow it shouldn't matter too much.

Alternatively you might be able to reduce the number of notifications
you get by setting up a servicedependency so all of the checks are
dependent on just one of them.

If the alerts are "Unknown" rather than "Warning" or "Critical" then
you can probably filter out the notifications using the
notification_options directive either on the service definition or
even on the contact definition.

As ever, there are lots of different ways to approach the same
problem!  I hope that helps a little.

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[Nagios-users] NRPE client issues

[Julie S. Lin]

Hi

I am monitoring a windows box with very basic out of the box plugins
using nsclient

However, whenever we start using this box there is great load on this  
box
(which is a server class machine)  and causes the nagios checks to time
out and falsely page.

Has any one run into this issue and how to resolve?

Julie S. Lin
System Administrator
j...@livescribe.com
(510) 553 4912 (o)
(510) 367 5772 (c)



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Re: [Nagios-users] NRPE issues

[Mathew Walker]

Perhaps you made a change to the nrpe.cfg and had not restarted NRPE service 
previously?  I periodically forget to do this myself when updating commands.

-- 
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> From: j...@livescribe.com
> To: nagios-users@lists.sourceforge.net
> Date: Thu, 14 Jul 2011 10:46:34 -0700
> Subject: Re: [Nagios-users] NRPE issues
> 
> Hi
> 
> thanks so much for hte reply.  I'm sure they are referncing same  
> commang.
> wha'ts weird is when I restart nrpe client,  the checks become  
> consistent.
> Anyone encounter this issue?
> 
> Julie S. Lin
> System Administrator
> j...@livescribe.com
> (510) 553 4912 (o)
> (510) 367 5772 (c)
> 
> 
> 
> On Jul 14, 2011, at 1:47 AM, Assaf Flatto wrote:
> 
> > Julie S. Lin wrote:
> >> Hi All
> >>
> >> please excuse the newbie question, but I'm having issues with NRPE
> >> returning inconsistent results
> >>
> >> on the local machine :
> >> #./check_mycheck
> >> result ? 1   <--- critical
> >>
> >> on the nagios server :
> >> ./check_nrpe -H myhost -c check_mycheck
> >> result? 0 <--- OK
> >>
> >> how can this happen ?
> >>
> >> Julie S. Lin
> >> System Administrator
> >> j...@livescribe.com
> >> (510) 553 4912 (o)
> >> (510) 367 5772 (c)
> >>
> > Are you sure the NRPE is referencing the same command you are using
> > manually ?
> >
> > check the path in the nrpe.cfg file.
> >
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Re: [Nagios-users] NRPE issues

[Julie S. Lin]

Hi

thanks so much for hte reply.  I'm sure they are referncing same  
commang.
wha'ts weird is when I restart nrpe client,  the checks become  
consistent.
Anyone encounter this issue?

Julie S. Lin
System Administrator
j...@livescribe.com
(510) 553 4912 (o)
(510) 367 5772 (c)



On Jul 14, 2011, at 1:47 AM, Assaf Flatto wrote:

> Julie S. Lin wrote:
>> Hi All
>>
>> please excuse the newbie question, but I'm having issues with NRPE
>> returning inconsistent results
>>
>> on the local machine :
>> #./check_mycheck
>> result ? 1   <--- critical
>>
>> on the nagios server :
>> ./check_nrpe -H myhost -c check_mycheck
>> result? 0 <--- OK
>>
>> how can this happen ?
>>
>> Julie S. Lin
>> System Administrator
>> j...@livescribe.com
>> (510) 553 4912 (o)
>> (510) 367 5772 (c)
>>
> Are you sure the NRPE is referencing the same command you are using
> manually ?
>
> check the path in the nrpe.cfg file.
>
> --
> AppSumo Presents a FREE Video for the SourceForge Community by Eric
> Ries, the creator of the Lean Startup Methodology on "Lean Startup
> Secrets Revealed." This video shows you how to validate your ideas,
> optimize your ideas and identify your business strategy.
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Re: [Nagios-users] NRPE issues

[Boyer, Timothy A.]

I see you're testing locally as root.  That has bitten me more than once.

-Original Message-
From: Julie S. Lin [mailto:j...@livescribe.com] 
Sent: Wednesday, July 13, 2011 2:13 PM
To: Nagios Users List
Subject: [Nagios-users] NRPE issues

Hi All

please excuse the newbie question, but I'm having issues with NRPE  
returning inconsistent results

on the local machine :
#./check_mycheck
result ? 1   <--- critical

on the nagios server :
./check_nrpe -H myhost -c check_mycheck
result? 0 <--- OK

how can this happen ?

Julie S. Lin
System Administrator
j...@livescribe.com
(510) 553 4912 (o)
(510) 367 5772 (c)



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Re: [Nagios-users] NRPE issues

[Assaf Flatto]

Julie S. Lin wrote:
> Hi All
>
> please excuse the newbie question, but I'm having issues with NRPE  
> returning inconsistent results
>
> on the local machine :
> #./check_mycheck
> result ? 1   <--- critical
>
> on the nagios server :
> ./check_nrpe -H myhost -c check_mycheck
> result? 0 <--- OK
>
> how can this happen ?
>
> Julie S. Lin
> System Administrator
> j...@livescribe.com
> (510) 553 4912 (o)
> (510) 367 5772 (c)
>   
Are you sure the NRPE is referencing the same command you are using 
manually ?

check the path in the nrpe.cfg file.

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[Nagios-users] NRPE issues

[Julie S. Lin]

Hi All

please excuse the newbie question, but I'm having issues with NRPE  
returning inconsistent results

on the local machine :
#./check_mycheck
result ? 1   <--- critical

on the nagios server :
./check_nrpe -H myhost -c check_mycheck
result? 0 <--- OK

how can this happen ?

Julie S. Lin
System Administrator
j...@livescribe.com
(510) 553 4912 (o)
(510) 367 5772 (c)



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Re: [Nagios-users] NRPE and include_dir

[Mike Chesnut]

On 03/15/2011 10:23 AM, Mike Chesnut wrote:
> On 03/15/2011 08:56 AM, Andreas Ericsson wrote:
>> On 03/15/2011 04:16 PM, Mike Chesnut wrote:
>>> On 03/14/2011 07:00 PM, Mike Chesnut wrote:
 We're trying to use the include_dir directive in NRPE with an
 /etc/nagios/nrpe.d/ directory.  My assumption was that files in this
 directory would be loaded in alphanumeric order, but it seems to only
 load in alphabetical order, ignoring numerals.
>>>
>>> To follow up on this, it turns out that in nrpe.c, readdir() is used to
>>> load files from the config directory, which is totally non-deterministic
>>> in the order the files are read.
>>>
>>> I believe this to be a bug, as I think it's a reasonable expectation
>>> (based on how pretty much every other program that allows you to include
>>> a conf.d directory works) for the files to be loaded in alphanumeric order.
>>>
>>
>> This should really only be a problem if you're loading more than one
>> command with the same name. If that's the case, you've done something
>> pretty severely wrong anyway since NRPE doesn't guarantee that either
>> of them will win out and the order could thus change at any time. It's
>> a tossup if we should use "first wins" or "last wins", and since it
>> isn't documented it can (and possibly will) change.
>
> So my assertion is that it's preferable for things like this to be
> well-defined (and documented), rather than being essentially random.
>
> We have what I consider to be a pretty reasonable situation where this
> would be useful.  I'm happy to share the specifics if anybody's curious,
> but it seems to me that it'd be generally useful to the whole community
> to have things like this spelled out explicitly, one way or another.
>
>>> Is there a reason anybody knows of that this belief is incorrect?  If
>>> not, I'll work on a patch.
>>>
>>
>> See above. If you still want to fix it, make sure you also update
>> the documentation so that it's obvious what the order of domination
>> is wrt commands with the same name.
>
> Will do.  No guarantees I get to it, but hopefully.  If anybody has an
> objection to this change please let me know before I waste my time.

I have this patch completed, and we've been running it in production for 
a couple of weeks now with no problems.

Should I submit the patch officially somewhere?  (Is it wanted?)  I'm 
not finding any information on how to submit an NRPE patch.  Ditto for 
the documentation, which seems to only exist in .odt form.

Any pointers/opinions would be greatly appreciated.

Thanks,
Mike

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Re: [Nagios-users] NRPE and include_dir

[Mike Chesnut]

On 03/15/2011 08:56 AM, Andreas Ericsson wrote:
> On 03/15/2011 04:16 PM, Mike Chesnut wrote:
>> On 03/14/2011 07:00 PM, Mike Chesnut wrote:
>>> We're trying to use the include_dir directive in NRPE with an
>>> /etc/nagios/nrpe.d/ directory.  My assumption was that files in this
>>> directory would be loaded in alphanumeric order, but it seems to only
>>> load in alphabetical order, ignoring numerals.
>>
>> To follow up on this, it turns out that in nrpe.c, readdir() is used to
>> load files from the config directory, which is totally non-deterministic
>> in the order the files are read.
>>
>> I believe this to be a bug, as I think it's a reasonable expectation
>> (based on how pretty much every other program that allows you to include
>> a conf.d directory works) for the files to be loaded in alphanumeric order.
>>
>
> This should really only be a problem if you're loading more than one
> command with the same name. If that's the case, you've done something
> pretty severely wrong anyway since NRPE doesn't guarantee that either
> of them will win out and the order could thus change at any time. It's
> a tossup if we should use "first wins" or "last wins", and since it
> isn't documented it can (and possibly will) change.

So my assertion is that it's preferable for things like this to be 
well-defined (and documented), rather than being essentially random.

We have what I consider to be a pretty reasonable situation where this 
would be useful.  I'm happy to share the specifics if anybody's curious, 
but it seems to me that it'd be generally useful to the whole community 
to have things like this spelled out explicitly, one way or another.

>> Is there a reason anybody knows of that this belief is incorrect?  If
>> not, I'll work on a patch.
>>
>
> See above. If you still want to fix it, make sure you also update
> the documentation so that it's obvious what the order of domination
> is wrt commands with the same name.

Will do.  No guarantees I get to it, but hopefully.  If anybody has an 
objection to this change please let me know before I waste my time.

Thanks,
Mike

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Re: [Nagios-users] NRPE and include_dir

[Andreas Ericsson]

On 03/15/2011 04:16 PM, Mike Chesnut wrote:
> On 03/14/2011 07:00 PM, Mike Chesnut wrote:
>> We're trying to use the include_dir directive in NRPE with an
>> /etc/nagios/nrpe.d/ directory.  My assumption was that files in this
>> directory would be loaded in alphanumeric order, but it seems to only
>> load in alphabetical order, ignoring numerals.
> 
> To follow up on this, it turns out that in nrpe.c, readdir() is used to
> load files from the config directory, which is totally non-deterministic
> in the order the files are read.
> 
> I believe this to be a bug, as I think it's a reasonable expectation
> (based on how pretty much every other program that allows you to include
> a conf.d directory works) for the files to be loaded in alphanumeric order.
> 

This should really only be a problem if you're loading more than one
command with the same name. If that's the case, you've done something
pretty severely wrong anyway since NRPE doesn't guarantee that either
of them will win out and the order could thus change at any time. It's
a tossup if we should use "first wins" or "last wins", and since it
isn't documented it can (and possibly will) change.

> Is there a reason anybody knows of that this belief is incorrect?  If
> not, I'll work on a patch.
> 

See above. If you still want to fix it, make sure you also update
the documentation so that it's obvious what the order of domination
is wrt commands with the same name.

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Re: [Nagios-users] NRPE and include_dir

[Mike Chesnut]

On 03/14/2011 07:00 PM, Mike Chesnut wrote:
> We're trying to use the include_dir directive in NRPE with an
> /etc/nagios/nrpe.d/ directory.  My assumption was that files in this
> directory would be loaded in alphanumeric order, but it seems to only
> load in alphabetical order, ignoring numerals.

To follow up on this, it turns out that in nrpe.c, readdir() is used to 
load files from the config directory, which is totally non-deterministic 
in the order the files are read.

I believe this to be a bug, as I think it's a reasonable expectation 
(based on how pretty much every other program that allows you to include 
a conf.d directory works) for the files to be loaded in alphanumeric order.

Is there a reason anybody knows of that this belief is incorrect?  If 
not, I'll work on a patch.

Thanks,
Mike

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[Nagios-users] NRPE and include_dir

[Mike Chesnut]

Apologies if this list isn't appropriate for this question, but I 
thought I'd try here first.

We're trying to use the include_dir directive in NRPE with an 
/etc/nagios/nrpe.d/ directory.  My assumption was that files in this 
directory would be loaded in alphanumeric order, but it seems to only 
load in alphabetical order, ignoring numerals.

For instance, if I have these files:
/etc/nagios/nrpe.d/000-fileone.cfg
/etc/nagios/nrpe.d/100-filetwo.cfg

and they both define the same command, I would expect the one in 
100-filetwo.cfg to take precedence, as it should be loaded second. 
However, this is not the case.  (I've verified the order they are loaded 
with debug=1).

If I have these files, though:
/etc/nagios/nrpe.d/aaa-fileone.cfg
/etc/nagios/nrpe.d/bbb-filetwo.cfg

then things work in the order I expect (checks defined in 
bbb-filetwo.cfg will override checks defined in aaa-fileone.cfg).

I'm using NRPE 2.5.2, which I realize is slightly old (2.12 seems to be 
the most recent version).  I can't find a bug report for this issue, 
though, so I'm not sure if it's been recognized as such, nor if it's 
been corrected in newer versions.  In fact, I see no documentation 
anywhere that specifies the order in which files will be loaded from 
within a directory that's been included with include_dir.

Has anybody seen this behavior?  Am I correct in believing it to be a bug?

Thanks,
Mike

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Re: [Nagios-users] nrpe CheckEventLog

[Tristan Drinkwater]

Arh, no got it

I uncommented the lines in the ini file but didn't change their values from 0 
to 1.

Not to worry.

Thanks all :)

-Original Message-
From: Tristan Drinkwater [mailto:trist...@micro-p.com] 
Sent: 16 February 2011 13:13
To: Nagios Users List
Subject: Re: [Nagios-users] nrpe CheckEventLog

Thanks for the reply.

I fear the main problem here is the lack of knowledge that's sat in-between my 
chair and my pc :)

I've edited the ini file on the server to allow both arguments and nasty chars 
and restarted the service.

If I use the -a switch after -c checkEventLog all I get back is 'CHECK_NRPE: 
Received 0 bytes from daemon... blah, blah blah...'

To me, that's suggests something isn't right on my windows server end, but what?

Thanks again :)


-Original Message-
From: Mark Elsen [mailto:mark.el...@gmail.com]
Sent: 16 February 2011 12:55
To: Nagios Users List
Subject: Re: [Nagios-users] nrpe CheckEventLog

On Wed, Feb 16, 2011 at 1:38 PM, Tristan Drinkwater  
wrote:
> Hi guys,
>
> I hope someone can help me.
>
> I'm trying to set up Nagios to return a warning for all red error logs in 
> both the system and application logs on a windows 2003 server.
>
> So far no matter what I try I always get 'Eventlog Check ok' even when I know 
> that there are some red error's showing in the log.
>
> I've just been running this from the libexec folder so far as I what to get 
> the syntax right before defining the service and alike.
>
> ./check_nrpe -H IP -p 5667 -c checkEventLog file=application 
> file=system filter-eventType==error filter-generated=\<1d
>
>
> Any ideas anyone?
>
> NSclient 3.3.20 installed on windows machine.
>
>
> Can someone provide a simple syntax that will at least produce something more 
> interesting the 'ok' so I know that's it is possible? At the moment I'm 
> thinking it's stuck at only reporting 'ok' no matter what I do.
>

  Ah, the ole-dead-thing, isn't working as it is supposed too case :-).

  Usually this  means that something is overlooked , or there is a 
knowledge-gap in corrrect usage of the needed tool ;
  Some things to remark :

 - normally in your example command the  '-a' flag should appear 
after checkEventLog to denote arguments following (I think)
 - in the NSC config file on the remote host, support for arguments 
must be , explicitly enabled, as also support for nasty meta chars (I think)
 - further I would advice to make tests against the lastest version 
of NSClient 0.3.8..x , because the syntax changed somewhat, and this can 
influence  behavior, pending your are looking at links with correct examples 
w.r.t to the version of NSClient used , or not.

M.

--
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4387 91

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Peripherals Limited.

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Email in error and that any use, dissemination, forwarding, printing, or 
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Pinpoint memory and threading errors before they happen.
Find and fix more than 250 security defects in the development cycle.
Locate bottlenecks in serial and parallel code that limit performance.
http://p.sf.net/sfu/intel-dev2devfeb
_

Re: [Nagios-users] nrpe CheckEventLog

[Mark Elsen]

> Thanks for the reply.
>
> I fear the main problem here is the lack of knowledge that's sat in-between 
> my chair and my pc :)
>
> I've edited the ini file on the server to allow both arguments and nasty 
> chars and restarted the service.
>
> If I use the -a switch after -c checkEventLog all I get back is 'CHECK_NRPE: 
> Received 0 bytes from daemon... blah, blah blah...'
>
> To me, that's suggests something isn't right on my windows server end, but 
> what?
>
>

 As far as NSC config file on windows server 2003 is concerned I have :

;# COMMAND ARGUMENT PROCESSING
;  This option determines whether or not the NRPE daemon will allow
clients to specify arguments to commands that are executed.
allow_arguments=1
;
;# COMMAND ALLOW NASTY META CHARS
;  This option determines whether or not the NRPE daemon will allow
clients to specify nasty (as in |`&><'"\[]{}) characters in arguments.
allow_nasty_meta_chars=1


  For the rest this, probably, only, means that there is a syntax
conflict pending. Trial and error should lead to pinpointing the
problem
  Als remember the versioning issue.


M.

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Re: [Nagios-users] nrpe CheckEventLog

[Jim Avery]

On 16 February 2011 12:38, Tristan Drinkwater  wrote:
> Hi guys,
>
> I hope someone can help me.
>
> I'm trying to set up Nagios to return a warning for all red error logs in 
> both the system and application logs on a windows 2003 server.
>
> So far no matter what I try I always get 'Eventlog Check ok' even when I know 
> that there are some red error's showing in the log.
>
> I've just been running this from the libexec folder so far as I what to get 
> the syntax right before defining the service and alike.
>
> ./check_nrpe -H IP -p 5667 -c checkEventLog file=application file=system 
> filter-eventType==error filter-generated=\<1d
>
>
> Any ideas anyone?
>
> NSclient 3.3.20 installed on windows machine.


If it's any help to you, the entry I have in my nsc.ini file in the
[External Alias] section is:

  alias_CheckEventLog=CheckEventLog file=application file=system
MaxWarn=1 MaxCrit=1 "filter=generated gt -1h AND severity NOT IN
('success', 'informational')" truncate=800 unique descriptions
"syntax=%severity%: %source%: %message% (%count%)"

(that's all one line in case your email file wraps it)

As you can see it uses the new syntax.  Note that to use external
aliases like this, you need to uncomment the line which reads:

  CheckExternalScripts.dll

And you can query it from the Nagios server simply with

  ./check_nrpe -H IP -p 5667 -c alias_CheckEventLog

This method where all the command line options are in the agent config
can be useful for troubleshooting, as you're less likely to hit
problems with escaping non-alphanumeric characters.  Once you have it
working nicely you can try moving to the the method you were trying
where the command line options are specified in the Nagios config.

I hope that helps rather than confuses!

Cheers,

Jim

--
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Find and fix more than 250 security defects in the development cycle.
Locate bottlenecks in serial and parallel code that limit performance.
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Re: [Nagios-users] nrpe CheckEventLog

[Tristan Drinkwater]

Thanks for the reply.

I fear the main problem here is the lack of knowledge that's sat in-between my 
chair and my pc :)

I've edited the ini file on the server to allow both arguments and nasty chars 
and restarted the service.

If I use the -a switch after -c checkEventLog all I get back is 'CHECK_NRPE: 
Received 0 bytes from daemon... blah, blah blah...'

To me, that's suggests something isn't right on my windows server end, but what?

Thanks again :)


-Original Message-
From: Mark Elsen [mailto:mark.el...@gmail.com]
Sent: 16 February 2011 12:55
To: Nagios Users List
Subject: Re: [Nagios-users] nrpe CheckEventLog

On Wed, Feb 16, 2011 at 1:38 PM, Tristan Drinkwater  
wrote:
> Hi guys,
>
> I hope someone can help me.
>
> I'm trying to set up Nagios to return a warning for all red error logs in 
> both the system and application logs on a windows 2003 server.
>
> So far no matter what I try I always get 'Eventlog Check ok' even when I know 
> that there are some red error's showing in the log.
>
> I've just been running this from the libexec folder so far as I what to get 
> the syntax right before defining the service and alike.
>
> ./check_nrpe -H IP -p 5667 -c checkEventLog file=application
> file=system filter-eventType==error filter-generated=\<1d
>
>
> Any ideas anyone?
>
> NSclient 3.3.20 installed on windows machine.
>
>
> Can someone provide a simple syntax that will at least produce something more 
> interesting the 'ok' so I know that's it is possible? At the moment I'm 
> thinking it's stuck at only reporting 'ok' no matter what I do.
>

  Ah, the ole-dead-thing, isn't working as it is supposed too case :-).

  Usually this  means that something is overlooked , or there is a 
knowledge-gap in corrrect usage of the needed tool ;
  Some things to remark :

 - normally in your example command the  '-a' flag should appear 
after checkEventLog to denote arguments following (I think)
 - in the NSC config file on the remote host, support for arguments 
must be , explicitly enabled, as also support for nasty meta chars (I think)
 - further I would advice to make tests against the lastest version 
of NSClient 0.3.8..x , because the syntax changed somewhat, and this can 
influence  behavior, pending your are looking at links with correct examples 
w.r.t to the version of NSClient used , or not.

M.

--
The ultimate all-in-one performance toolkit: Intel(R) Parallel Studio XE:
Pinpoint memory and threading errors before they happen.
Find and fix more than 250 security defects in the development cycle.
Locate bottlenecks in serial and parallel code that limit performance.
http://p.sf.net/sfu/intel-dev2devfeb
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Registered Office: Shorten Brook Way, Altham Business Park, Altham,
Accrington, Lancs. BB5 5YJ.  Tel: (01282) 776776   Fax: (01282) 858790
Micro Peripherals Limited. Registered in England No. 1511931. VAT No. GB 864 
4387 91

DISCLAIMER:
This e-mail and attachments are confidential and are intended solely for the 
use of the individual to
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author and do not
necessarily represent those of Micro Peripherals Limited.
If you are not the intended recipient, be advised that you have received this 
Email in error and that
any use, dissemination, forwarding, printing, or copying of this Email is 
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delete this message from
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All electronic transmissions to and from Micro Peripherals Ltd are recorded and 
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Pinpoint memory and threading errors before they happen.
Find and fix more than 250 security defects in the development cycle.
Locate bottlenecks in serial and parallel code that limit performance.
http://p.sf.net/sfu/intel-dev2devfeb
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Re: [Nagios-users] nrpe CheckEventLog

[Mark Elsen]

On Wed, Feb 16, 2011 at 1:38 PM, Tristan Drinkwater
 wrote:
> Hi guys,
>
> I hope someone can help me.
>
> I'm trying to set up Nagios to return a warning for all red error logs in 
> both the system and application logs on a windows 2003 server.
>
> So far no matter what I try I always get 'Eventlog Check ok' even when I know 
> that there are some red error's showing in the log.
>
> I've just been running this from the libexec folder so far as I what to get 
> the syntax right before defining the service and alike.
>
> ./check_nrpe -H IP -p 5667 -c checkEventLog file=application file=system 
> filter-eventType==error filter-generated=\<1d
>
>
> Any ideas anyone?
>
> NSclient 3.3.20 installed on windows machine.
>
>
> Can someone provide a simple syntax that will at least produce something more 
> interesting the 'ok' so I know that's it is possible? At the moment I'm 
> thinking it's stuck at only reporting 'ok' no matter what I do.
>

  Ah, the ole-dead-thing, isn't working as it is supposed too case :-).

  Usually this  means that something is overlooked , or there is a
knowledge-gap in corrrect usage of the needed tool ;
  Some things to remark :

 - normally in your example command the  '-a' flag should
appear after checkEventLog to denote arguments following (I think)
 - in the NSC config file on the remote host, support for
arguments must be , explicitly enabled, as also support for nasty meta
chars (I think)
 - further I would advice to make tests against the
lastest version of NSClient 0.3.8..x , because the syntax changed
somewhat, and
this can influence  behavior, pending your are looking at links with
correct examples w.r.t to the version of NSClient used , or not.

M.

--
The ultimate all-in-one performance toolkit: Intel(R) Parallel Studio XE:
Pinpoint memory and threading errors before they happen.
Find and fix more than 250 security defects in the development cycle.
Locate bottlenecks in serial and parallel code that limit performance.
http://p.sf.net/sfu/intel-dev2devfeb
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[Nagios-users] nrpe CheckEventLog

[Tristan Drinkwater]

Hi guys,

I hope someone can help me.

I'm trying to set up Nagios to return a warning for all red error logs in both 
the system and application logs on a windows 2003 server.

So far no matter what I try I always get 'Eventlog Check ok' even when I know 
that there are some red error's showing in the log.

I've just been running this from the libexec folder so far as I what to get the 
syntax right before defining the service and alike.

./check_nrpe -H IP -p 5667 -c checkEventLog file=application file=system 
filter-eventType==error filter-generated=\<1d


Any ideas anyone?

NSclient 3.3.20 installed on windows machine.


Can someone provide a simple syntax that will at least produce something more 
interesting the 'ok' so I know that's it is possible? At the moment I'm 
thinking it's stuck at only reporting 'ok' no matter what I do.

Thanks in advance :)

Micro Peripherals Limited.
Registered Office: Shorten Brook Way, Altham Business Park, Altham,
Accrington, Lancs. BB5 5YJ.  Tel: (01282) 776776   Fax: (01282) 858790
Micro Peripherals Limited. Registered in England No. 1511931. VAT No. GB 864 
4387 91

DISCLAIMER:
This e-mail and attachments are confidential and are intended solely for the 
use of the individual to
whom it is addressed. Any views or opinions presented are solely those of the 
author and do not
necessarily represent those of Micro Peripherals Limited.
If you are not the intended recipient, be advised that you have received this 
Email in error and that
any use, dissemination, forwarding, printing, or copying of this Email is 
strictly prohibited. If this
transmission is received in error please notify the sender immediately and 
delete this message from
your E-mail system.
All electronic transmissions to and from Micro Peripherals Ltd are recorded and 
may be monitored.

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Pinpoint memory and threading errors before they happen.
Find and fix more than 250 security defects in the development cycle.
Locate bottlenecks in serial and parallel code that limit performance.
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[Nagios-users] NRPE- Log files in syslog

[Archana Ramamoorthy]

Thank you Jeffrey. I'm actually new to both Nagios and the world of Unix. I
shall however read up on syslog. I was very particular about this because i
wanted to know the exact point where nrpe writes to syslog so that i
re-route it and make it write to a place of my choice. The main reason I
would want to do this is because i will not have access to the syslog of
many servers in my company.

On Wed, Jan 26, 2011 at 6:14 PM, Jeffrey Watts wrote:

> You really ought to read up on syslog and how it works.  It can do
> everything you're asking.  The whole point of the syslog service is to
> abstract logging from the application - so that it can be centralized,
> filtered, separated, etc.  :)
>
> Try (depends on which syslog you have running, ps can help you figure that
> out):
> man 5 syslog.conf
> man 5 syslog-ng.conf
>
> That will help you with the format of the configuration file.  If you're
> not familiar with the concepts of syslog in general, I'd recommend googling.
>
> Good luck!
> Jeffrey.
>
> On Wed, Jan 26, 2011 at 11:36 AM, Archana Ramamoorthy <
> archu2i...@yahoo.co.in> wrote:
>
>> Hi All:
>>
>> I use the NPRE plugin for Nagios and i know that setting the value of the
>> variable "debug" to 1 in the nrpe.cfg file would make the debug messages to
>> be logged into the syslog facility. Is there a way for me to make it log
>> into some other folder of my choice instead of it even getting stored in
>> syslog? I couldn't find the exact script/file where it actually writes stuff
>> into syslog. It would be great if someone could tell me where to find this
>> file or how to change the option to make it log into a folder of my choice.
>>
>> Also, i tried to find if i could find some plugin to log into some other
>> folder. I could find many plugins for NSCA log but i couldn't find anything
>> for NRPE. It would be great if anybody could help me with this.
>>
>> Thanks.
>>
>> Regards,
>> Archana
>>
>>
>>
>
> --
> Special Offer-- Download ArcSight Logger for FREE (a $49 USD value)!
> Finally, a world-class log management solution at an even better
> price-free!
> Download using promo code Free_Logger_4_Dev2Dev. Offer expires
> February 28th, so secure your free ArcSight Logger TODAY!
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>
> --
> Archana
>
>
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Re: [Nagios-users] NRPE- Log files in syslog

[Jeffrey Watts]

You really ought to read up on syslog and how it works.  It can do
everything you're asking.  The whole point of the syslog service is to
abstract logging from the application - so that it can be centralized,
filtered, separated, etc.  :)

Try (depends on which syslog you have running, ps can help you figure that
out):
man 5 syslog.conf
man 5 syslog-ng.conf

That will help you with the format of the configuration file.  If you're not
familiar with the concepts of syslog in general, I'd recommend googling.

Good luck!
Jeffrey.

On Wed, Jan 26, 2011 at 11:36 AM, Archana Ramamoorthy <
archu2i...@yahoo.co.in> wrote:

> Hi All:
>
> I use the NPRE plugin for Nagios and i know that setting the value of the
> variable "debug" to 1 in the nrpe.cfg file would make the debug messages to
> be logged into the syslog facility. Is there a way for me to make it log
> into some other folder of my choice instead of it even getting stored in
> syslog? I couldn't find the exact script/file where it actually writes stuff
> into syslog. It would be great if someone could tell me where to find this
> file or how to change the option to make it log into a folder of my choice.
>
> Also, i tried to find if i could find some plugin to log into some other
> folder. I could find many plugins for NSCA log but i couldn't find anything
> for NRPE. It would be great if anybody could help me with this.
>
> Thanks.
>
> Regards,
> Archana
>
>
>
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[Nagios-users] NRPE- Log files in syslog

[Archana Ramamoorthy]

Hi All:

I use the NPRE plugin for Nagios and i know that setting the value of the
variable "debug" to 1 in the nrpe.cfg file would make the debug messages to
be logged into the syslog facility. Is there a way for me to make it log
into some other folder of my choice instead of it even getting stored in
syslog? I couldn't find the exact script/file where it actually writes stuff
into syslog. It would be great if someone could tell me where to find this
file or how to change the option to make it log into a folder of my choice.

Also, i tried to find if i could find some plugin to log into some other
folder. I could find many plugins for NSCA log but i couldn't find anything
for NRPE. It would be great if anybody could help me with this.

Thanks.

Regards,
Archana
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[Nagios-users] NRPE- Log files in syslog

[Archana Ramamoorthy]

Hi All:

I use the NPRE plugin for Nagios and i know that setting the value of the
variable "debug" to 1 in the nrpe.cfg file would make the debug messages to
be logged into the syslog facility. Is there a way for me to make it log
into some other folder of my choice instead of it even getting stored in
syslog? I couldn't find the exact script/file where it actually writes stuff
into syslog. It would be great if someone could tell me where to find this
file or how to change the option to make it log into a folder of my choice.

Also, i tried to find if i could find some plugin to log into some other
folder. I could find many plugins for NSCA log but i couldn't find anything
for NRPE. It would be great if anybody could help me with this.

Thanks.

Regards,
Archana
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Re: [Nagios-users] NRPE

[Ihab Samara]

It is working now.

The requiretty on sudoers solved it, I used added this to sudoers, to allow the 
nagios user only:




Defaults:nagios !requiretty


Thanks Mark for the help
Ihab




> From: mark.el...@gmail.com
> Date: Tue, 7 Dec 2010 17:30:51 +0100
> To: nagios-users@lists.sourceforge.net
> Subject: Re: [Nagios-users] NRPE
> 
> > Hi List
> >
> > I have a problem using check_nrpe:
> >
> > The script on the remote machine is running this command:
> >
> > #/bin/bash
> >
> > output=`sudo /usr/sbin/lsof -X |grep tomcat| wc -l`
> >
> > max=$1
> >
> > if [ "$output" -lt "$max" ]; then
> >
> > echo "OK |value is "$output""
> >
> > exit 0;
> >
> > else
> >
> > echo "CRITICAL value is "$output""
> >
> > exit 2;
> >
> > fi
> >
> > I have this line in sudoers file:
> >
> > nagios   ALL=(ALL)   NOPASSWD: /usr/sbin/lsof
> >
> > I have this in the nrpe.cfg:
> >
> > command[check_lsof]=/usr/local/nagios/libexec/check_lsof.sh 256
> >
> >
> > When I run the command from the nagios user on the remote machine:
> >
> > [nag...@serv_1]$ /usr/local/nagios/libexec/check_lsof.sh 256
> > OK |value is 132
> >
> > When I run it from the Nagios server (remotely):
> > [r...@healthy libexec]# ./check_nrpe -H 10.1.1.1 -c check_lsof
> > OK |value is 0
> >
> >
> > Ive set the user in /etc/xinetd.d/nrpe to "nagios", and all the other checks
> > are working fine.
> >
> > Any thoughts?
> >
> >
> 
> - Search for 'sudo' in nrpe.cfg , make sure the sudo prefix is set,
> not commented.
> 
> - Look for 'tty' in the sudoers file, make sure 'requiretty' is commented.
> 
> M.
> 
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Re: [Nagios-users] NRPE

[Mark Elsen]

> Hi List
>
> I have a problem using check_nrpe:
>
> The script on the remote machine is running this command:
>
> #/bin/bash
>
> output=`sudo /usr/sbin/lsof -X |grep tomcat| wc -l`
>
> max=$1
>
> if [ "$output" -lt "$max" ]; then
>
> echo "OK |value is "$output""
>
> exit 0;
>
> else
>
> echo "CRITICAL value is "$output""
>
> exit 2;
>
> fi
>
> I have this line in sudoers file:
>
> nagios   ALL=(ALL)   NOPASSWD: /usr/sbin/lsof
>
> I have this in the nrpe.cfg:
>
> command[check_lsof]=/usr/local/nagios/libexec/check_lsof.sh 256
>
>
> When I run the command from the nagios user on the remote machine:
>
> [nag...@serv_1]$ /usr/local/nagios/libexec/check_lsof.sh 256
> OK |value is 132
>
> When I run it from the Nagios server (remotely):
> [r...@healthy libexec]# ./check_nrpe -H 10.1.1.1 -c check_lsof
> OK |value is 0
>
>
> Ive set the user in /etc/xinetd.d/nrpe to "nagios", and all the other checks
> are working fine.
>
> Any thoughts?
>
>

- Search for 'sudo' in nrpe.cfg , make sure the sudo prefix is set,
not commented.

- Look for 'tty' in the sudoers file, make sure 'requiretty' is commented.

M.

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Re: [Nagios-users] NRPE

[Enrico Zimol]

>command[check_lsof]=sudo /usr/local/nagios/libexec/check_lsof.sh 256

Try this, with sudo


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[Nagios-users] NRPE

[Ihab Samara]

Hi List

I have a problem using check_nrpe:

The script on the remote machine is running this command: 

  #/bin/bash

   output=`sudo /usr/sbin/lsof -X |grep tomcat| wc -l`

   max=$1

   if [ "$output" -lt "$max" ]; then

 echo "OK |value is "$output""

 exit 0;

   else

 echo "CRITICAL value is "$output""

   exit 2;

   fi

I have this line in sudoers file:

nagios   ALL=(ALL)   NOPASSWD: /usr/sbin/lsof

I have this in the nrpe.cfg:

command[check_lsof]=/usr/local/nagios/libexec/check_lsof.sh 256


When I run the command from the nagios user on the remote machine:

[nag...@serv_1]$ /usr/local/nagios/libexec/check_lsof.sh 256
OK |value is 132

When I run it from the Nagios server (remotely):
[r...@healthy libexec]# ./check_nrpe -H 10.1.1.1 -c check_lsof
OK |value is 0


Ive set the user in /etc/xinetd.d/nrpe to "nagios", and all the other checks 
are working fine.

Any thoughts?




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[Nagios-users] nrpe and check_apcups newb problem

[Andy Graybeal]

Greetings, I'm sure this is a newb problem, but I'm sorry I haven't been 
able to figure it out.

I'm trying to monitor my APC UPS on a remote computer.

My nagios website is saying this:


APC CHARGE  UNKNOWN 2010-09-28 18:22:02 7d 8h 2m 19s4/4 
(No output 
returned from plugin)

APC LOADUNKNOWN 2010-09-28 18:23:17 7d 8h 1m 4s 4/4 
(No output 
returned from plugin)

APC STATUS  UNKNOWN 2010-09-28 18:24:32 7d 7h 59m 49s   4/4 
(No output 
returned from plugin)

APC TEMPUNKNOWN 2010-09-28 18:25:47 7d 7h 58m 34s   4/4 
(No output 
returned from plugin)


running the check_nrpe from the command line works great though:

a...@nagios:/usr/lib/nagios/plugins$ ./check_nrpe -H 192.168.2.200 -c 
check_apcups_bcharge
OK - Battery Charge: 100.0%
a...@nagios:/usr/lib/nagios/plugins$ ./check_nrpe -H 192.168.2.200 -c 
check_apcups_loadpct
OK - Load: 57.2%
a...@nagios:/usr/lib/nagios/plugins$ ./check_nrpe -H 192.168.2.200 -c 
check_apcups_status
ONLINE - STATUS : ONLINE
a...@nagios:/usr/lib/nagios/plugins$ ./check_nrpe -H 192.168.2.200 -c 
check_apcups_itemp
OK - Internal Temperature: 27.0 C
a...@nagios:/usr/lib/nagios/plugins$

I think this shows that the NRPE client is configured correctly on the 
remote computer, and the nagios box is chatting correctly with the 
remote computer.

How do I go about making this work?

-Andy

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Re: [Nagios-users] NRPE and ip range in allowed hosts

[Michael Friedrich]

Assaf Flatto wrote:
>On 23/09/10 12:40, Andreas Ericsson wrote:
>
>> On 09/22/2010 03:47 PM, Assaf Flatto wrote:
>>  
>>>  Hello
>>>
>>> Has anyone tried placing a range ip entry in the allowedhosts directive
>>> of NRPE ?
>>>
>>> Will putting 10.1.0.0/24  work ?
>>>
>>>
>> No, it won't.
>>
>>  
>>> If not ,does anyone know if is it something that is planned to future
>>> versions of NRPE ?
>>>
>> It's not. NRPE isn't maintained very rigorously since it Just Works(tm).
>>
>>  
>
> So there is no way to specify a range of servers , one must put all IP's
> individually ?
>

is_an_allowed_host either awaits hostname(s) to do a dns resolve, or 
checks for an ip list. no ip ranges currently possible from within that 
code base.

possible resolution might be a cidr check, getting lowest and highest ip 
from allowed_range and compare then the converted unsigned long's.

Kind regards,
Michael

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Re: [Nagios-users] NRPE and ip range in allowed hosts

[Sebastian Ries]

Hi
> 
> So there is no way to specify a range of servers , one must put all IP's 
> individually ?

just as an idea:

Can inetd handle the range of IPs?
Then you could think about starting the nrpe-server with inetd.

Regards
Sebastian Ries

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Re: [Nagios-users] NRPE and ip range in allowed hosts

[Assaf Flatto]

  On 23/09/10 12:40, Andreas Ericsson wrote:
> On 09/22/2010 03:47 PM, Assaf Flatto wrote:
>> Hello
>>
>> Has anyone tried placing a range ip entry in the allowedhosts directive
>> of NRPE ?
>>
>> Will putting 10.1.0.0/24  work ?
>>
> No, it won't.
>
>> If not ,does anyone know if is it something that is planned to future
>> versions of NRPE ?
> It's not. NRPE isn't maintained very rigorously since it Just Works(tm).
>


So there is no way to specify a range of servers , one must put all IP's 
individually ?


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Re: [Nagios-users] NRPE and ip range in allowed hosts

[Andreas Ericsson]

On 09/22/2010 03:47 PM, Assaf Flatto wrote:
>Hello
> 
> Has anyone tried placing a range ip entry in the allowedhosts directive
> of NRPE ?
> 
> Will putting 10.1.0.0/24  work ?
> 

No, it won't.

> If not ,does anyone know if is it something that is planned to future
> versions of NRPE ?
> 

It's not. NRPE isn't maintained very rigorously since it Just Works(tm).

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Re: [Nagios-users] NRPE and ip range in allowed hosts

[Herb J.]

Yes, CIDR-style notation is accepted.


On 09/22/2010 08:47 AM, Assaf Flatto wrote:
>Hello
>
> Has anyone tried placing a range ip entry in the allowedhosts directive
> of NRPE ?
>
> Will putting 10.1.0.0/24  work ?
>
> If not ,does anyone know if is it something that is planned to future
> versions of NRPE ?
>
>


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[Nagios-users] NRPE and ip range in allowed hosts

[Assaf Flatto]

  Hello

Has anyone tried placing a range ip entry in the allowedhosts directive 
of NRPE ?

Will putting 10.1.0.0/24  work ?

If not ,does anyone know if is it something that is planned to future 
versions of NRPE ?

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[Nagios-users] nrpe use Help

[Oscar Cano Rodriguez]

> When I run any command to monitor a solaris the nrpe server runs fine from
> console, however in the browser sends me the error:
>
> (Return code of 137 is out of bounds)
>
> I'm using solaris 10
>

The command is definidon in NagiosQL as
$USER1$/check_nrpe -H $HOSTADDRESS$ -t 15 -c $ARG1$

$USER1$ = /usr/local/nagios/libexec


Then send console output ls

$ Echo $ LD_LIBRARY_PATH
/ Usr / local / lib: / usr / local / libexec: / usr / sfw / lib: / usr /
local / nagios / libexec

/ Usr / local / nagios / libexec / check_nrpe-H 10.11.3.12
NRPE v2.12

/ Usr / local / nagios / libexec / check_nrpe-M 10.11.3.12-t 15-c
check_total_procs
PROCS OK: 40 procesos


>
> Any ideas?
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[Nagios-users] nrpe check times out on one host, works perfectly on another.

[Thomas Johnson]

Hello,

I have got a peculiar issue with nagios that I have been trying to
track down. I have an nrpe check configured to run a perl script on a
pair of firewalls (fwiw, it monitors the state table utilization for
pf). Nagios has no problems checking this script on the first
firewall, but it always times out on the check for the second
firewall. The firewalls are configured [nearly] identically, and if I
run the check_nrpe2 command manually on the nagios host (both as root
and as the nagios user), both hosts respond as expected.

nag...@calvin:~-> /usr/local/libexec/nagios/check_nrpe2 -H
foobar-1-dev.claimlynx.com -c check_pf_states
2187 (%1.0935)
nag...@calvin:~-> /usr/local/libexec/nagios/check_nrpe2 -H
foobar-2-dev.claimlynx.com -c check_pf_states
2383 (%1.1915)

I have restarted nagios and nrpe2 numerous times, with no effect.
Running nrpe with debugging enabled on foobar-2 (the problem host)
never shows any connections from the nagios host for the
check_pf_states check. However, other nrpe checks on this host are
working without any issue. I have also confirmed with tcpdump that
there are no uncompleted connection attempts, or any that request this
check.

The relevant parts of my nagios config are as follows:

define service{
host_name   foobar-1, foobar-2
service_description Check pf State tables
use generic-service
check_command   rcheck_pf_states
contact_groups  clx-admins-email-24x7
}

define command{
command_namercheck_pf_states
command_line$USER1$/check_nrpe2 -H
$HOSTNAME$ -c check_pf_states
}

define host {
host_name   foobar-1
alias   Firewall Primary (Dev Interface)
address foobar-1-dev.claimlynx.com
use new-generic-host
parents sw-dev
}

define host {
host_name   foobar-2
alias   Firewall Secondary (Dev Interface)
address foobar-2-dev.claimlynx.com
use new-generic-host
parents sw-dev
}

The nrpe2 command definition is as follows. It is worth noting that
both firewalls read a shared nrpe config file (to prevent fat fingers
from getting in the way).

command[check_pf_states]=sudo /usr/local/libexec/nagios/check_pf_states

Here is my check script (try not to laugh too hard):

#!/usr/local/bin/perl

# This script checks the number of firewall states currently in use by pf
# and triggers an alert if the number of values exceeds a certain percentage
# of the maximum allowed states.

use strict;
use warnings;
use 5.010;
use lib "/usr/local/libexec/nagios";
use utils qw(%ERRORS);

my $debug;

# Define variables that will be used throughout the script
my $state_limit;# Will contain the max size of the state table
my $current_states; # Will contain the current size of the state table
my $adaptive_start; # Will contain the state count that starts adaptive 
timeouts

# Get the current state table limit
my @output = `pfctl -s memory 2>/dev/null | grep '^states'`;
say "DEBUG: Found " . @output . " lines while grepping for state table
size." if $debug;
for (@output) {
if ( m/^states\s+hard limit\s+(\d+)/ ) {
$state_limit = $1;
say "DEBUG: State table size: $state_limit" if $debug;
last;
}
say "DEBUG: State table size not found in: $_" if $debug;
}
unless ( defined $state_limit ) { die "State limit not found. Cannot
continue.\n"; }

# Get the value of adaptive start to calculate the critical bound
@output = `pfctl -s timeouts 2>/dev/null | grep '^adaptive.start'`;
say "DEBUG: Found " . @output . " lines while grepping for lower
adaptive timeout bound." if $debug;
for (@output) {
if ( m/^adaptive.start\s+(\d+) states/ ) {
$adaptive_start = $1;
say "DEBUG: Adaptive timeout lower bound is at $adaptive_start
states (" . 100*($adaptive_start/$state_limit) . "%)." if $debug;
last;
}
say "DEBUG: Adaptive timeout lower bound not found in: $_" if $debug;
}
unless ( defined $adaptive_start ) { die "Adaptive timeout lower bound
not found. Cannot continue.\n"; }

# Get the current size of the state table
@output = `pfctl -s info 2>/dev/null | grep 'current entries'`;
say "DEBUG: Found " . @output . " lines while grepping for the number
of state table entries." if $debug;
for (@output) {
if ( m/^\s+current entries\s+(\d+)/ ) {
$current_states = $1;
say "DEBUG: PF reports $current_states state entries in use." 
if $debug;
last;
}
say "DEBUG: State entry count not found in : $_" if $debug;
}
unless ( defined $current_states ) { die "Could not determine the
current number of

Re: [Nagios-users] nrpe use

[Oscar Cano Rodriguez]

thanks, must be something else because the file I have set the variable
resource.cfg:
$USER1$ = /usr/local/nagios/libexec


2010/9/14 Dorfman, Justin 

> in resource.cfg where does  $USER1$ point to? FreeBSD e.g.:
>
> $USER1$=/usr/local/libexec/nagios
>
> For your case it believe it should be:
>
> *$USER1$=**/Usr/local/nagios/libexec/*
>
>
> Regards,
>
> Justin Dorfman
> Mahalo.com Inc. > Jr. Systems Engineer
> 818.485.1458
> @jdorfman  | 
> @MahaloSysops| Blog:
> http://bit.ly/aNiWSk
>
>
> On Tue, Sep 14, 2010 at 4:35 PM, Oscar Cano Rodriguez 
> wrote:
>
>> The command is definidon in NagiosQL as
>>
>> $USER1$/check_nrpe -H $HOSTADDRESS$ -t 15 -c $ARG1$
>>
>>
>>
>> --
>> Start uncovering the many advantages of virtual appliances
>> and start using them to simplify application deployment and
>> accelerate your shift to cloud computing.
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>>
>
>
>
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> and start using them to simplify application deployment and
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-- 
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Av. Revolución No. 1176-3052
Col. San José Insurgentes
C.P. 03900,
México, D.F.,
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Re: [Nagios-users] nrpe use

[Dorfman, Justin]

in resource.cfg where does  $USER1$ point to? FreeBSD e.g.:

$USER1$=/usr/local/libexec/nagios

For your case it believe it should be:

*$USER1$=**/Usr/local/nagios/libexec/*


Regards,

Justin Dorfman
Mahalo.com Inc. > Jr. Systems Engineer
818.485.1458
@jdorfman  |
@MahaloSysops| Blog:
http://bit.ly/aNiWSk


On Tue, Sep 14, 2010 at 4:35 PM, Oscar Cano Rodriguez wrote:

> The command is definidon in NagiosQL as
>
> $USER1$/check_nrpe -H $HOSTADDRESS$ -t 15 -c $ARG1$
>
>
>
> --
> Start uncovering the many advantages of virtual appliances
> and start using them to simplify application deployment and
> accelerate your shift to cloud computing.
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Re: [Nagios-users] nrpe use

[Oscar Cano Rodriguez]

The command is definidon in NagiosQL as

$USER1$/check_nrpe -H $HOSTADDRESS$ -t 15 -c $ARG1$
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Re: [Nagios-users] nrpe use

[Dorfman, Justin]

Could you provide a screen shot?


Regards,

Justin Dorfman
Mahalo.com Inc. > Jr. Systems Engineer
818.485.1458
@jdorfman  |
@MahaloSysops| Blog:
http://bit.ly/aNiWSk


On Tue, Sep 14, 2010 at 2:04 PM, Oscar Cano Rodriguez wrote:

> When I run any command to monitor a solaris the nrpe server runs fine from
> console, however in the browser sends me the error:
>
> (Return code of 137 is out of bounds)
>
> I'm using solaris 10
>
> Any ideas?
>
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[Nagios-users] nrpe use

[Oscar Cano Rodriguez]

When I run any command to monitor a solaris the nrpe server runs fine from
console, however in the browser sends me the error:

(Return code of 137 is out of bounds)

I'm using solaris 10

Any ideas?
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[Nagios-users] NRPE check_procs cutting off arguments?

[Robert Swerdlow]

We are using Nagios 3.0.5 and one of our services monitors a  
particular job on a particular server:

define service{
...
check_command   check_nrpe!check_myown1_job
}

and in the nrpe.cfg file we define that command:
command[check_myown1_job]=/usr/lib/nagios/plugins/check_procs -c 1:1  
-a /home/myuser01/src/server/scripts/sync_api/ 
make_async_xmlrequest_libraries.py

We just upgraded NRPE and this check started failing - it reported 0  
processes.  However, the process was running and the command works  
fine when run locally on the target machine.

After some trial and error, I discovered that the arguments to the  
target process seem to be cut off.

This works:
command[check_myown1_job]=/usr/lib/nagios/plugins/check_procs -c 1:1  
-a /home/myuser01/src/server/scripts/sync_api/make_as
but this fails:
command[check_myown1_job]=/usr/lib/nagios/plugins/check_procs -c 1:1  
-a /home/myuser01/src/server/scripts/sync_api/make_asy

The commands are identical except that the second one has one  
additional character ('y').  Any command longer than the first one  
fails.

This also works:
command[check_myown1_job]=/usr/lib/nagios/plugins/check_procs -c 1:1  
-a make_as
but this also fails:
command[check_myown1_job]=/usr/lib/nagios/plugins/check_procs -c 1:1  
-a make_asy
So, it does not seem to be a problem in the argument string passed  
in, but rather in the arguments read from the remote machine.

Is there some setting that controls size of the argument on the  
target machine that will allow me to specify the entire argument?

Bob Swerdlow
Chief Engineer
Emergent Discovery
rswerd...@emergentdiscovery.com
207-774-3100


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Re: [Nagios-users] NRPE: No output returned from plugin error

[yuris]

Bingo!

I suspected that it's something really stupid, like typo or something 
like almost always in cases like this!

thanks everybody involved and especially Benny :)

--
wbr,
yuris

C. Bensend wrote:
>> command[check_users]="/usr/lib64/nagios/plugins/check_users -w 5 -c 10"
>> command[check_load]="/usr/lib64/nagios/plugins/check_load -w 15,10,5 -c
>> 30,25,20"
>> command[check_disk]="/usr/lib64/nagios/plugins/check_disk -w 20% -c 10%
>> -p /dev/mapper/VolGroup00-LogVol00"
>> command[check_zombie_procs]="/usr/lib64/nagios/plugins/check_procs -w 5
>> -c 10 -s Z"
>> command[check_total_procs]="/usr/lib64/nagios/plugins/check_procs -w 200
>> -c 300"
>> 
>
> Have you tried those without double quotes?
>
> If 'check_nrpe -H host' works, but 'check_nrpe -H host -c command'
> doesn't, it's a problem with the plugin, pure and simple.  Be it path,
> incorrect usage, bad arguments, whatever, it's complaining about the
> execution of (or inability to execute) the plugin.
>
> Benny
>
>
>   


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Re: [Nagios-users] NRPE: No output returned from plugin error

[C. Bensend]

> command[check_users]="/usr/lib64/nagios/plugins/check_users -w 5 -c 10"
> command[check_load]="/usr/lib64/nagios/plugins/check_load -w 15,10,5 -c
> 30,25,20"
> command[check_disk]="/usr/lib64/nagios/plugins/check_disk -w 20% -c 10%
> -p /dev/mapper/VolGroup00-LogVol00"
> command[check_zombie_procs]="/usr/lib64/nagios/plugins/check_procs -w 5
> -c 10 -s Z"
> command[check_total_procs]="/usr/lib64/nagios/plugins/check_procs -w 200
> -c 300"

Have you tried those without double quotes?

If 'check_nrpe -H host' works, but 'check_nrpe -H host -c command'
doesn't, it's a problem with the plugin, pure and simple.  Be it path,
incorrect usage, bad arguments, whatever, it's complaining about the
execution of (or inability to execute) the plugin.

Benny


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Re: [Nagios-users] NRPE: No output returned from plugin error

[yuris]

There is nrpe.cfg:

log_facility=daemon
pid_file=/var/run/nrpe.pid
server_port=5666
nrpe_user=nrpe
nrpe_group=nrpe
allowed_hosts=nagios.domain
dont_blame_nrpe=0
debug=1
command_timeout=60
connection_timeout=300
command[check_users]="/usr/lib64/nagios/plugins/check_users -w 5 -c 10"
command[check_load]="/usr/lib64/nagios/plugins/check_load -w 15,10,5 -c 
30,25,20"
command[check_disk]="/usr/lib64/nagios/plugins/check_disk -w 20% -c 10% 
-p /dev/mapper/VolGroup00-LogVol00"
command[check_zombie_procs]="/usr/lib64/nagios/plugins/check_procs -w 5 
-c 10 -s Z"
command[check_total_procs]="/usr/lib64/nagios/plugins/check_procs -w 200 
-c 300"

--
wbr,
yuris



Assaf Flatto wrote:
> yuris wrote:
>   
>> I strongly doubt it has any relation to ssl:
>>
>> NRPE - Nagios Remote Plugin Executor
>> Copyright (c) 1999-2008 Ethan Galstad (nag...@nagios.org)
>> Version: 2.12
>> Last Modified: 03-10-2008
>> License: GPL v2 with exemptions (-l for more info)
>> SSL/TLS Available: Anonymous DH Mode, OpenSSL 0.9.6 or higher required
>> TCP Wrappers Available
>>
>> this is output from nrpe (Centos binary package) that shows it's 
>> compiled with ssl/tls support. Openssl library is installed as well.
>>
>> Anyway. I tried suggested workaround, defining "check_nrpe_no_ssl" as 
>> "$USER1$/check_nrpe -H $HOSTADDRESS$ -c $ARG1$ -n" and defining service 
>> as "check_nrpe_no_ssl!check_load" and running nrpe deamon no centos host 
>> with "-n" option - result is just the same, "NRPE: Unable to read output"
>>
>> However, when I do "./check_nrpe -H centos.host.com" it does return me 
>> nrpe version correctly ("NRPE v2.12").
>>
>>  From all this steps I figured that it is not about ssl at all - nrpe 
>> version is returned correctly with ssl and without it.
>>
>> Interesting, that in nagios server debug log I see that remote NRPE 
>> returns output that nagios check_nrpe cannot parse, it returns similar 
>> output, that I would get if call /usr/sbin/nrpe without arguments:
>>
>> so that seems to me as if NRPE does not understand arguments from 
>> check_nrpe or something...
>>
>> any ideas?
>>
>> --
>> best regards,
>> yuris
>>
>>   
>> 
> Yuris..
>
> Can you upload a sample nrpe.cfg from one of the centos servers ?
>
> That might shed more light on the issue ?
>
>   


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Re: [Nagios-users] NRPE: No output returned from plugin error

[Assaf Flatto]

yuris wrote:
> I strongly doubt it has any relation to ssl:
>
> NRPE - Nagios Remote Plugin Executor
> Copyright (c) 1999-2008 Ethan Galstad (nag...@nagios.org)
> Version: 2.12
> Last Modified: 03-10-2008
> License: GPL v2 with exemptions (-l for more info)
> SSL/TLS Available: Anonymous DH Mode, OpenSSL 0.9.6 or higher required
> TCP Wrappers Available
>
> this is output from nrpe (Centos binary package) that shows it's 
> compiled with ssl/tls support. Openssl library is installed as well.
>
> Anyway. I tried suggested workaround, defining "check_nrpe_no_ssl" as 
> "$USER1$/check_nrpe -H $HOSTADDRESS$ -c $ARG1$ -n" and defining service 
> as "check_nrpe_no_ssl!check_load" and running nrpe deamon no centos host 
> with "-n" option - result is just the same, "NRPE: Unable to read output"
>
> However, when I do "./check_nrpe -H centos.host.com" it does return me 
> nrpe version correctly ("NRPE v2.12").
>
>  From all this steps I figured that it is not about ssl at all - nrpe 
> version is returned correctly with ssl and without it.
>
> Interesting, that in nagios server debug log I see that remote NRPE 
> returns output that nagios check_nrpe cannot parse, it returns similar 
> output, that I would get if call /usr/sbin/nrpe without arguments:
>
> so that seems to me as if NRPE does not understand arguments from 
> check_nrpe or something...
>
> any ideas?
>
> --
> best regards,
> yuris
>
>   
Yuris..

Can you upload a sample nrpe.cfg from one of the centos servers ?

That might shed more light on the issue ?

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Re: [Nagios-users] NRPE: No output returned from plugin error

[yuris]

I strongly doubt it has any relation to ssl:

NRPE - Nagios Remote Plugin Executor
Copyright (c) 1999-2008 Ethan Galstad (nag...@nagios.org)
Version: 2.12
Last Modified: 03-10-2008
License: GPL v2 with exemptions (-l for more info)
SSL/TLS Available: Anonymous DH Mode, OpenSSL 0.9.6 or higher required
TCP Wrappers Available

this is output from nrpe (Centos binary package) that shows it's 
compiled with ssl/tls support. Openssl library is installed as well.

Anyway. I tried suggested workaround, defining "check_nrpe_no_ssl" as 
"$USER1$/check_nrpe -H $HOSTADDRESS$ -c $ARG1$ -n" and defining service 
as "check_nrpe_no_ssl!check_load" and running nrpe deamon no centos host 
with "-n" option - result is just the same, "NRPE: Unable to read output"

However, when I do "./check_nrpe -H centos.host.com" it does return me 
nrpe version correctly ("NRPE v2.12").

 From all this steps I figured that it is not about ssl at all - nrpe 
version is returned correctly with ssl and without it.

Interesting, that in nagios server debug log I see that remote NRPE 
returns output that nagios check_nrpe cannot parse, it returns similar 
output, that I would get if call /usr/sbin/nrpe without arguments:


[1277983505.131702] [016.2] [pid=17495] Parsing check output...
[1277983505.131711] [016.2] [pid=17495] Short Output: (No output 
returned from plugin)
[1277983505.131719] [016.2] [pid=17495] Long Output:  NRPE Plugin for 
Nagios\nCopyright (c) 1999-2008 Ethan Galstad 
(nag...@nagios.org)\nVersion: 2.12\nLast Modified: 03-10-2008\nLicense: 
GPL v2 with exemptions (-l for more info)\nSSL/TLS Available: Anonymous 
DH Mode, OpenSSL 0.9.6 or higher required\n\nUsage: check_nrpe -H  
[-n] [-u] [-p ] [-t ] [-c ] [-a 
]\n\nOptions:\n -n = Do no use SSL\n -u = 
Make socket timeouts return an UNKNOWN state instead of CRITICAL\n 
 = The address of the host running the NRPE daemon\n 
[port] = The port on which the daemon is running (default=5666)\n 
[timeout]  = Number of seconds before connection times out 
(default=10)\n [command]  = The name of the command that the remote 
daemon should run\n [arglist]  = Optional arguments that should be 
passed to the command.  Multiple\n  arguments should be 
separated by a space.  If provided, this must be\n  the last 
option supplied on the command line.\n -h,--helpPrint this short 
help.\n -l,--license Print licensing information.\n -n,--no-ssl  Do not 
initial an ssl handshake with the server, talk in 
plaintext.\n\nNote:\nThis plugin requires that you have the NRPE daemon 
running on the remote host.\nYou must also have configured the daemon to 
associate a specific plugin command\nwith the [command] option you are 
specifying here.  Upon receipt of the\n[command] argument, the NRPE 
daemon will run the appropriate plugin command and\nsend the plugin 
output and return code back to *this* plugin.  This allows you\nto 
execute plugins on remote hosts and 'fake' the results to make Nagios 
think\nthe plugin is being run locally.\n\n

so that seems to me as if NRPE does not understand arguments from 
check_nrpe or something...

any ideas?

--
best regards,
yuris


Greg Pangrazio wrote:
> I had a very similar problem with checks coming from Ubuntu 8.04 and
> 10.04 destined for RHEL.  I had to disable SSL on both ends and set
> the encryption method to 0.
>
> I would also check the NRPE config to make sure the passphrases match
> if you are using them.
>
>
> Greg Pangrazio
>
>
>
>
>
> On Thu, Jul 1, 2010 at 6:49 AM, Julius Kidubuka  wrote:
>   
>> Yuris,
>>
>> You could try compiling nrpe without ssl and then in your commands.cfg file
>> have something like this;
>>
>> # 'check_nrpe' command definition
>> define command{
>> command_namecheck_nrpe_no_ssl
>> command_line$USER1$/check_nrpe -H $HOSTADDRESS$ -c $ARG1$ -n
>> }
>>
>> Then in your specific service definitions have the check_command line read;
>>
>>  check_command   check_nrpe_no_ssl!
>>
>>
>> Hope this helps.
>>
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>> any issue.
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>>
>> 


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Re: [Nagios-users] NRPE: No output returned from plugin error

[Greg Pangrazio]

I had a very similar problem with checks coming from Ubuntu 8.04 and
10.04 destined for RHEL.  I had to disable SSL on both ends and set
the encryption method to 0.

I would also check the NRPE config to make sure the passphrases match
if you are using them.


Greg Pangrazio





On Thu, Jul 1, 2010 at 6:49 AM, Julius Kidubuka  wrote:
> Yuris,
>
> You could try compiling nrpe without ssl and then in your commands.cfg file
> have something like this;
>
> # 'check_nrpe' command definition
> define command{
>     command_name    check_nrpe_no_ssl
>     command_line    $USER1$/check_nrpe -H $HOSTADDRESS$ -c $ARG1$ -n
>     }
>
> Then in your specific service definitions have the check_command line read;
>
>  check_command   check_nrpe_no_ssl!
>
>
> Hope this helps.
>
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Re: [Nagios-users] NRPE: No output returned from plugin error

[Robert Wolfe]

This is what I did.  Some of my servers have nrpe compiled with SSL and some 
without so I just created two commands in commands.cfg for it -- one to check 
with NRPE with SSL and one without.
 
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   / __ \ | / / ___/ Robert Wolfe 
  / /_/ / | /| / /\__ \  Robert Wolfe Software
 / _, _/| |/ |/ /___/ /  Web : http://www.robertwolfe.org 
<http://www.robertwolfe.org/> 
/_/ |_| |__/|__///   Debian Blog : http://debian.robertwolfe.org 
<http://debian.robertwolfe.org/> 



From: Julius Kidubuka [mailto:juki.e...@gmail.com]
Sent: Thu 7/1/2010 7:49 AM
To: yu...@smtp.com; Nagios Users List
Subject: Re: [Nagios-users] NRPE: No output returned from plugin error


Yuris,

You could try compiling nrpe without ssl and then in your commands.cfg file 
have something like this;

# 'check_nrpe' command definition
define command{
command_namecheck_nrpe_no_ssl
command_line$USER1$/check_nrpe -H $HOSTADDRESS$ -c $ARG1$ -n
}

Then in your specific service definitions have the check_command line read;

 check_command   check_nrpe_no_ssl!


Hope this helps.
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