Nagios Support Forum

Posted: **Mon Jun 13, 2016 3:20 pm**

Do you see anything in the Apache error logs on the Nagios system when you send to it?
Can you post the command you are using to send the NRDP data from the client?
Did you enable the accept passive checks in the nagios.cfg file?

Posted: **Fri Jun 17, 2016 9:26 am**

Hello,

Thanks for the reply,

@Eloyd
I am not even getting a "Got host checkresult for 'NOTAREALHOST'" Error in the nagios log,.

@Tgriep
- Passive checks are enabled on the box.
- I do not know where to find the apache error log. I googled it and it should be in /var/log/apache2/ but did not find.
- My NRDP is installed correctly and successfully tested when going to http://nagiosxi//nrdp and entering the token.

My NRDP Command is the below:

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/home/nagiosscripts/send_nrdp.sh -u http://172.25.25.28/nrdp/ -t df23m7jadI34 -H "172.25.25.28" -s "DB_STATUS" -S 2 -o "DB status is DOWN"

Best Regards,
Peter

Posted: **Fri Jun 17, 2016 9:40 am**

peter19x wrote: @Tgriep
- I do not know where to find the apache error log. I googled it and it should be in /var/log/apache2/ but did not find.

Try /var/log/httpd instead.

Posted: **Fri Jun 17, 2016 12:27 pm**

Another place to look for any errors is on the server that is running the send_nrpd.sh script.
It should create XML files in the /tmp folder and if it cannot connect to the remote server, it should log it there.
The file should look similar to this.
/tmp/nrdp.XXXXXX

Posted: **Thu Jun 23, 2016 7:08 am**

Hello All,

Thank you for the reply,

I have found 2 files is /var/log/httpd: access_log and error_log.

When I tried to send my passive check from 172.25.25.11 I get the following in:

1) access_log:

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172.25.25.11 - - [23/Jun/2016:13:04:14 +0100] "POST /nrdp// HTTP/1.1" 200 170 "-" "curl/7.22.0 (x86_64-unknown-linux-gnu) libcurl/7.22.0 OpenSSL/1.0.0e zlib/1.2.5 c-ares/1.7.5 libidn/1.22 libssh2/1.2.9"

2) error_log:

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[Thu Jun 23 13:04:14 2016] [error] [client 172.25.25.11] PHP Warning:  date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/London' for 'BST/1.0/DST' instead in /usr/local/nrdp/server/plugins/nagioscorepassivecheck/nagioscorepassivecheck.inc.php on line 105
[Thu Jun 23 13:04:14 2016] [error] [client 172.25.25.11] PHP Warning:  chgrp(): Operation not permitted in /usr/local/nrdp/server/plugins/nagioscorepassivecheck/nagioscorepassivecheck.inc.php on line 119

Any Idea What might cause this error?

Best Regards,
Peter

Posted: **Thu Jun 23, 2016 7:45 am**

I see two things wrong.

1) you need to edit /etc/php.ini and set your proper timezone (search for "date.timezone" without the quotes).

2) it seems like you may have a misconfigured nagios group for the nagios command file. See the following.

To help figure out number 2, can you post the output of this commands on your core machine:

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head -130 /usr/local/nrdp/server/plugins/nagioscorepassivecheck/nagioscorepassivecheck.inc.php | tail -20

grep command /usr/local/nrdp/server/config.inc.php

I don't have the same code you do, so I'm not sure which chgrp is the problem, but it's likely that it's having a problem sending the output of the command to the nagios.cmd file. Knowing the output of the above commands will help me say for sure, but I'm guessing that's the problem.

Posted: **Thu Jun 23, 2016 9:55 am**

Thanks @eloyd!

@peter19x - let us know if you have any further questions.

Posted: **Fri Jun 24, 2016 4:45 am**

Hello @Eloyd.

Thanks for the reply.

Below are the output of the two commands you requested.

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[root@GSIP_MGNT_A httpd]# head -130 /usr/local/nrdp/server/plugins/nagioscorepassivecheck/nagioscorepassivecheck.inc.php | tail -20
                fprintf($fh,"exited_ok=1\n");
                fprintf($fh,"return_code=%d\n",$state);
                fprintf($fh,"output=%s\\n\n",$output);

                // close the file
                fclose($fh);

                // change ownership and perms
                chgrp($tmpname,$cfg["nagios_command_group"]);
                chmod($tmpname,0770);

                // create an ok-to-go, so Nagios Core picks it up
                $fh=fopen($tmpname.".ok","w+");
                fclose($fh);

                $total_checks++;
                }


        output_api_header();

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[root@GSIP_MGNT_A httpd]# grep command /usr/local/nrdp/server/config.inc.php
// the name of the system group that has write permissions to the external command file
// this group is also used to set file permissions when writing bulk commands or passive check results
$cfg["nagios_command_group"]="nagcmd";
// full path to Nagios external command file
$cfg["command_file"]="/usr/local/nagios/var/rw/nagios.cmd";

Best Regards,
Peter

Posted: **Fri Jun 24, 2016 6:46 am**

Hello,

I found out some other useful information.

The error :

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PHP Warning:  chgrp(): Operation not permitted in /usr/local/nrdp/server/plugins/nagioscorepassivecheck/nagioscorepassivecheck.inc.php on line 119

The line 119:

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chgrp($tmpname,$cfg["nagios_command_group"]);

$tmpname = /usr/local/nagios/var/spool/checkresults
$cfg["nagios_command_group"] = nagcmd

Now I went to /usr/local/nagios/var/spool/checkresults

And I found out everytime I send a passive check a file is create in this directory as below :

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-rw-r--r--. 1 apache apache 0 Jun 24 12:27 ctyy9e7.ok

somehow the apache user is the owner of the file so the chgrp command will not work because the script is running as nagios user.

Any idea how to get around that?

Best Regards,
Peter

Posted: **Fri Jun 24, 2016 7:08 am**

Peter,

You hit the nail on the head while I was driving in to the office.

You need to make it so your web server can write to your Nagios file. This is most easily accomplished by adding the "nagcmd" group to the "apache" user via this command:

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usermod apache -a -G nagcmd,nagios

You can verify it worked by typing the first line below. You should see something similar to the second line:

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# groups apache
apache : apache nagios nagcmd

(Edit: comma, not space, between group names when using usermod command)

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