mongoDB Nagios Monitoring

[rmuhammadali]

Dear All,

I am unable to monitor the mongoDB and stuck in an error: (Return code of 126 is out of bounds - plugin may not be executable).

1) When i execute directly
# /usr/lib64/nagios/plugins/check_mongodb -H 192.168.2.8 -A connections -W 10 -C 20
OK - 0 percent (1 of 51200 connections used)
it gives acurate output.

2) But when i execute it through service/command it gives the mentioned error.
define service {
use generic-service
host_name mongoDB
service_description MongoDB
check_command check_mongodb!connections!27017!10!20
}

defince command {
command_name check_mongodb
command_line $USER1$/check_mongodb -H $HOSTADDRESS$ -A $ARG1$ -P $ARG2$ -W $ARG3$ -C $ARG4$
}

3) service nagios restart executied but on updating nagios console found "Return code of 126 is out of bounds - plugin may not be executable" with Status-Critical.


Please help out to manage this issue.

Regards
RMA

[slansing]

Can you please share what value $USER1$ holds in:

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~nagios/etc/resource.cfg

It's possible that that value is pointing to the wrong directory, or do all of your other checks with $USER1$ work fine? Also, what is the output of:

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ls -la /usr/lib64/nagios/plugins/check_mongodb

[emislivec]

Also, is the plugin executable by the nagios user?

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sudo -u nagios /usr/lib64/nagios/plugins/check_mongodb -H 192.168.2.8 -A connections -W 10 -C 20

The permissions on the plugin should look like this (check_ping as an example):

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-rwxr-xr-x. 1 nagios nagios 176433 May 19  2014 /usr/local/nagios/libexec/check_ping

[rmuhammadali]

PS: slansing
Nagios Resource file contains the $USER1$ value "/usr/lib64/nagios/plugins" & Output of

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 /usr/lib64/nagios/plugins/check_mongodb
OK - Connection took 0 seconds

PS: emislivec
Write permissions for check_mongody.py is as

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-rwxr-xr-x. 1 root root 59053 Nov 25 20:24 /usr/lib64/nagios/plugins/check_mongodb.py

[rmuhammadali]

Dear All,
Cannot understand this execution, according to me every this fine but unable to get manage, please help me out.

[abrist]

Can you run the check through nrpe on the remote box?

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./check_nrpe -H localhost -p 5666 -c check_mongo_free

[emislivec]

Dear All,
Cannot understand this execution, according to me every this fine but unable to get manage, please help me out.

mongoDB NRPE Error - Nagios Support.jpg

Did you get your original problem fixed? It's easier for us to help you if we keep threads to one topic.

Does your plugin live at "/usr/lib64/nagios/plugins/check_mongodb"? Where did "/usr/lib64/nagios/plugins/check_mongodb.py" come from?

Are you trying to run

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/usr/lib64/nagios/plugins/check_mongodb -H 192.168.2.8 -A connections -W 10 -C 20

or

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/usr/lib64/nagios/plugins/check_mongodb -A connections -P 27017 -W 80 -C 90

?

What happens when you run your command on the NRPE box (run these exact commands):

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ssh root@192.168.1.10
/usr/lib64/nagios/plugins/check_mongodb -A connections -P 27017 -W 80 -C 90
sudo -u nagios /usr/lib64/nagios/plugins/check_mongodb -A connections -P 27017 -W 80 -C 90

Take a look at http://assets.nagios.com/downloads/nagi ... utions.pdf. It says XI, but it applies to NRPE in general.

You may need to add "sudo " to the start of your command definition in nrpe.cfg, and add a sudoers rule for the nagios user. The doc I linked shows an example of this.

[rmuhammadali]

Dear,
let me define myself again.

1) plugin is placed @ /usr/lib64/nagios/plugins directory

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[root@cent plugins]# ls -al check_mongodb*
lrwxrwxrwx. 1 root root    42 Dec 15 15:47 check_mongodb -> /usr/lib64/nagios/plugins/check_mongodb.py
-rwxr-xr-x. 1 root root 59053 Nov 25 20:24 check_mongodb.py

2) command @ my client /etc/nagios/nrpe.cfg

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command[check_mongo_free]=/usr/lib64/nagios/plugins/check_mongodb -A connections -P 27017 -W 80 -C 90

& allowed hosts @ my client /etc/nagios/nrpe.cfg

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allowed_hosts=127.0.0.1,192.168.2.10

3) as i write befone about error "Return code of 126 is out of bounds - plugin may not be executable", its already resolved, as i change file permoissions.

4) both commands show same results on nagios server

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/usr/lib64/nagios/plugins/check_mongodb -A connections -P 27017 -W 80 -C 90
OK - 0 percent (1 of 51200 connections) used
sudo -u nagios /usr/lib64/nagios/plugins/check_mongodb -A connections -P 27017 -W 80 -C 90
OK - 0 percent (1 of 51200 connections) used

commands running good but when i tried to fetch through service it gives below error.
5) my configurations @ nagios server /etc/nagios/myconf

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define command {
        command_name            check_nrpe
        command_line            $USER1$/check_nrpe -H $HOSTADDRESS$ -c $ARG1$ -t 160
        }

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define command {
    command_name    check_mongodb
    command_line    $USER1$/check_mongodb.py -H $HOSTADDRESS$ -A $ARG1$ -P $ARG2$ -W $ARG3$ -C $ARG4$
}

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define service{
        use                             generic-service
        host_name                       CENT
        service_description             Mongo Free Connections
        check_command                   check_nrpe!check_mongo_free!connections!27017!70!80
        }

6) nagios core result

Now suggest what to do.

[Box293]

& allowed hosts @ my client /etc/nagios/nrpe.cfg

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allowed_hosts=127.0.0.1,192.168.2.10

If nrpe on the remote host is being started under xinetd then please check:

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/etc/xinetd.d/nrpe

Update the only_from directive, for example:

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only_from       = 127.0.0.1 192.168.2.10

only_from uses a single space between IP Addresses.

Then restart the xinetd service.

[rmuhammadali]

no dear, its not running under xinetd.