How to Install a Production Ready Naemon Monitoring Server

Naemon is the new monitoring suite that aims to be fast, stable and innovative while giving you a clear view of the state of your network and applications.This is a replacement for nagios server and very stable and uses an amazing dashboard called thruk. Setting up naemon is very easy and has live status inbuild .In this tutorial, I will show you how to install and configure naemon in a production environment along with pnp4nagios for graphs. Naemon is very stable, I will show you how to maintain the configs in a large scale environment.

In this tutorial, I will be using four Servers

  • 192.168.1.170 - Naemon Server - centos 7
  • 192.168.1.21 - nrpe client - centos 6
  • 192.168.1.182 - nrpe client - ubuntu
  • 192.168.1.75 - nscp client - windows server 2012R2

Installation of Naemon Server

I am using a CentOS 7 host with a minimal installation, SELinux disabled and firewalld enabled.

[[email protected] ~]# sestatus
SELinux status:                 disabled
[[email protected] ~]#

Installing the repo:

[[email protected] ~]# yum -y install https://labs.consol.de/repo/stable/rhel7/x86_64/labs-consol-stable.rhel7.noarch.rpm

enabling the epel repo:

yum -y install epel-release

Installing the Naemon package:

[[email protected] ~]# yum install naemon*

Naemon uses the same Nagios plugin and nrpe to monitor hosts. We will now install them:

[[email protected] ~]# yum install nagios-plugins nagios-plugins-all nagios-plugins-nrpe nrpe -y

We will add the firewall rules:

   
[[email protected] ~]# firewall-cmd --add-service=http --permanent
success
[[email protected] ~]# firewall-cmd --add-service=https --permanent
success
[[email protected] ~]# firewall-cmd --reload
success
[[email protected] ~]# firewall-cmd --list-all
public (active)
  target: default
  icmp-block-inversion: no
  interfaces: eno16777736
  sources:
  services: dhcpv6-client http https ssh
  ports:
  protocols:
  masquerade: no
  forward-ports:
  sourceports:
  icmp-blocks:
  rich rules:

[[email protected] ~]#

    

Installation of pnp4nagios.

yum install gcc-c++ rrdtool perl-Time-HiRes perl-rrdtool php-gd php php-cli wget

Downloading pnp4nagios.

[[email protected] ~]# wget https://svwh.dl.sourceforge.net/project/pnp4nagios/PNP-0.6/pnp4nagios-0.6.25.tar.gz
    [[email protected] ~]# tar -zxvf pnp4nagios-0.6.25.tar.gz
    [[email protected] ~]# cd pnp4nagios-0.6.25/
[[email protected] pnp4nagios-0.6.25]# ./configure --with-nagios-user=naemon --with-nagios-group=naemon
[[email protected] pnp4nagios-0.6.25]# make all
[[email protected] pnp4nagios-0.6.25]# make fullinstall
[[email protected] pnp4nagios-0.6.25]# make install-webconf
[[email protected] pnp4nagios-0.6.25]# make install-config
[[email protected] pnp4nagios-0.6.25]# make install-init
    

Restarting and enabling the service.

    [[email protected] ~]# systemctl enable httpd && systemctl restart httpd
[[email protected] ~]# systemctl enable naemon && systemctl restart naemon
[[email protected] ~]# systemctl enable thruk && systemctl restart thruk
[[email protected] ~]# systemctl enable npcd && systemctl restart npcd
    

you should be able to access the URL from http://192.168.1.170/thruk

Thruk interface

The default username is thrukadmin, password is thrukadmin.

In case you want to change the thrukadmin password, run:

[[email protected] ~]# htpasswd /etc/thruk/htpasswd thrukadmin

Installation of Monitoring Client to monitor the nodes

Installation of nrpe clients for monitoring Linux hosts

192.168.1.21 - nrpe client - centos 6

Installation of the Nagios plugin and nrpe client:

[[email protected] ~]# yum install nagios-plugins nagios-plugins-all nagios-plugins-nrpe nrpe -y

Take a backup of the nrpe.cfg:

[[email protected] ~]# cp /etc/nagios/nrpe.cfg /etc/nagios/nrpe.cfg.bkp

Replace the content of the nrpe.conf file with the below content:

[[email protected] ~]# cat /etc/nagios/nrpe.cfg
log_facility=daemon
pid_file=/var/run/nrpe/nrpe.pid
nrpe_user=nrpe
nrpe_group=nrpe
allowed_hosts=127.0.0.1,192.168.1.170
dont_blame_nrpe=1
debug=0
command_timeout=60
connection_timeout=300
include_dir=/etc/nrpe.d/

[[email protected] ~]#
    

Under allowed_host add the naemon server ipaddress here it is 192.168.1.170.

Now we need to restart the nrpe service:

	[[email protected] ~]# service nrpe restart
	[[email protected] ~]# chkconfig nrpe on
	

192.168.1.182 - nrpe client - ubuntu

[email protected]:~# apt-get install nagios-nrpe-server nagios-plugins -y

Take a backup of the nrpe.cfg:

[[email protected] ~]# cp /etc/nagios/nrpe.cfg /etc/nagios/nrpe.cfg.bkp

Replace the content of the nrpe.conf file with the below content:

[email protected]:~# cat /etc/nagios/nrpe.cfg
log_facility=daemon
pid_file=/var/run/nagios/nrpe.pid
nrpe_user=nagios
nrpe_group=nagios
allowed_hosts=127.0.0.1,192.168.1.170
dont_blame_nrpe=1
debug=0
command_timeout=60
connection_timeout=300
include_dir=/etc/nagios/nrpe.d/
[email protected]:~#
    

Now we need to restart the nrpe service:

	[email protected]:~# systemctl restart nagios-nrpe-server.service
	[email protected]:~# systemctl enable nagios-nrpe-server.service
	

Installation of Nscp on Windows

192.168.1.75 - nscp client - windows server 2012R2

Download nscp from this website:

https://www.nsclient.org/download/

Once downloaded, please follow the installation screenshots

Choose generic.

Choose complete:

Choose the default path:

Now, under allowed hosts, please add the naemon host. Here in our setup it is 192.168.1.170.

Make sure you give a complex password. For this example, I have used the password as "howtoforge". Next check enable nsclient and nrpe.

Once the installation is complete, please make sure the service is up and running.

We will now validate from naemon host, to make sure we are able to reach it.

Validate nrpe and nscp from Naemon Server to check the connectivity

[[email protected] ~]# /usr/lib64/nagios/plugins/check_nrpe -H 192.168.1.182
NRPE v2.15
[[email protected] ~]# /usr/lib64/nagios/plugins/check_nrpe -H 192.168.1.21
NRPE v2.15
[[email protected] ~]#
	
[[email protected] ~]# /usr/lib64/nagios/plugins/check_nt -H 192.168.1.75 -p 12489 -v CLIENTVERSION -s 'howtoforge'
NSClient++ 0.5.0.62 2016-09-14
[[email protected] ~]#

	

Monitoring of Servers

We will monitor the server's performance in this tutorial.

In a production environment, we will need to monitor the CPU , memory and harddisk utilization, along with the host alive check.

Adding the following lines in nrpe conf /etc/nrpe.d/base.cfg

192.168.1.21 - nrpe client - centos 6

  [[email protected] ~]# cat /etc/nrpe.d/base.cfg
command[check_disks]=/usr/lib64/nagios/plugins/check_disk -w $ARG1$ -c $ARG2$ -p $ARG3$
command[check_disk]=/usr/lib64/nagios/plugins/check_disk -X nfs -X cifs -X none -X tmpfs -w $ARG1$ -c $ARG2$
command[memory]=/usr/lib64/nagios/plugins/check_memory -w $ARG1$ -c $ARG2$
command[load]=/usr/lib64/nagios/plugins/check_load -w $ARG1$ -c $ARG2$
command[check_total_procs]=/usr/lib64/nagios/plugins/check_procs -w $ARG1$ -c $ARG2$
command[check_procs_c]=/usr/lib64/nagios/plugins/check_procs -c $ARG1$ -C $ARG2$
command[check_procs_a]=/usr/lib64/nagios/plugins/check_procs -c $ARG1$ -a $ARG2$
  

Save and restart the file, then restart nrpe.

[[email protected] ~]# /etc/init.d/nrpe restart
Shutting down nrpe:                                        [FAILED]
Starting nrpe:                                             [  OK  ]
[[email protected] ~]#
 

Memory plugin will not be available as default plugin. We will use the below plugin.

 [[email protected] ~]# cd  /usr/lib64/nagios/plugins/
 [[email protected] plugins]# vim check_memory

Add the below content.

#! /usr/bin/perl -w
##Included Perf data
#The nagios plugins come with ABSOLUTELY NO WARRANTY. You may redistribute
#copies of the plugins under the terms of the GNU General Public License.
#
use strict;
use Getopt::Long;

my ($opt_f, $opt_h, $opt_c, $opt_w);
my ($result, $message, $ram_percent);

my $PROGNAME="check_memory";

$opt_f = "";

Getopt::Long::Configure('bundling');
GetOptions(
        "h"   => \$opt_h, "help"        => \$opt_h,
        "c=s" => \$opt_c, "Warning_Percentage"  => \$opt_c,
        "w=s" => \$opt_w, "Critical_Percentage" => \$opt_w,
);

if ($opt_h) {
        &print_help();
        exit 0;
}

$opt_w = shift unless ($opt_w);
$opt_c = shift unless ($opt_c);

if (! $opt_c && ! $opt_w) {
        print "Warning and Critical must be specified\n";
        exit 3;
}
if ($opt_c <= $opt_w){
        print "Critical must be greater than Warning CRITICAL: $opt_c WARNING: $opt_w\n";
        exit 3;
}



$result = 'OK';
open(FREE_M, "free -m|");
while (my $line = ){
        if ($line =~ /^Mem/){
                my ($junk,$total_mem,$used_mem,$free_mem,$shared_mem,$buffered_mem,$cached_mem)=split(/\s+/,$line);
                $ram_percent=int(($total_mem-($free_mem+$cached_mem+$buffered_mem))/$total_mem*100*100)/100;

        }
}
close(FREE_M);

if ($ram_percent > $opt_c){
print "Memory usage is: CRITICAL: ${ram_percent}% used | used=$ram_percent;$opt_w;$opt_c\n";
exit 2;
}elsif ($ram_percent > $opt_w) {
print "Memory usage is: WARNING: ${ram_percent}% used | used=$ram_percent;$opt_w;$opt_c\n";
exit 1;
}
else{
print "Memory usage is: $result: ${ram_percent}% used | used=$ram_percent;$opt_w;$opt_c\n";
exit 0;
}

sub print_usage () {
        print "Usage:\n";
        print "  $PROGNAME -f \n";
        print "  $PROGNAME -c \n";
        print "  $PROGNAME -w \n";
        print "  $PROGNAME [-h | --help]\n";
        print "  $PROGNAME [-V | --version]\n";
}

sub print_help () {
        print << EOF; 
$PROGNAME v1.0.01
The nagios plugins come with ABSOLUTELY NO WARRANTY. You may redistribute
copies of the plugins under the terms of the GNU General Public License.
EOF
        &print_usage();
        print "\n";
        exit 3;
}


Download link check_memory plugin

You have to give execute permissions to the file:

  [[email protected] plugins]# chmod 755 check_memory

Adding the following lines in nrpe conf /etc/nagios/nrpe.d/base.cfg

192.168.1.182 - nrpe client - ubuntu

Here the file path is different:

The plugin folder is lib and not lib64.

  [email protected]:~# cat /etc/nagios/nrpe.d/base.cfg
command[check_disks]=/usr/lib/nagios/plugins/check_disk -w $ARG1$ -c $ARG2$ -p $ARG3$
command[check_disk]=/usr/lib/nagios/plugins/check_disk -X nfs -X cifs -X none -X tmpfs -w $ARG1$ -c $ARG2$
command[memory]=/usr/lib/nagios/plugins/check_memory -w $ARG1$ -c $ARG2$
command[load]=/usr/lib/nagios/plugins/check_load -w $ARG1$ -c $ARG2$
command[check_total_procs]=/usr/lib/nagios/plugins/check_procs -w $ARG1$ -c $ARG2$
command[check_procs_c]=/usr/lib/nagios/plugins/check_procs -c $ARG1$ -C $ARG2$
command[check_procs_a]=/usr/lib/nagios/plugins/check_procs -c $ARG1$ -a $ARG2$
  

Add the same check_memory script in /usr/lib/nagios/plugins.

  [email protected]:~# vim /usr/lib/nagios/plugins/check_memory
[email protected]:~# chmod 755 /usr/lib/nagios/plugins/check_memory
[email protected]:~# systemctl restart nagios-nrpe-server.service
[email protected]:~#

Configuration on Naemon Server

Login as naemon user:

[[email protected] ~]# su - naemon
Last login: Thu Mar  9 17:11:39 CET 2017 on pts/0
-sh-4.2$

Change the admin mail in /etc/naemon/naemon.cfg

........
........
[email protected]
[email protected]
........
........

Now we will configure the custom commands to do the check in /etc/naemon/conf.d

Create a custom commands called custom_commands.cfg with below content.

$ vim /etc/naemon/conf.d/custom_commands.cfg

## Host Alive check ##
# command 'check_icmp Host Alive'
define command{
    command_name                   host_alive
    command_line                   $USER1$/check_icmp -H $HOSTADDRESS$ -n 1 -w 3000.00,80% -c 5000.00,100%
    }
### Service Command ##
# command 'check_nrpe_disks'
define command{
    command_name                   check_nrpe_disks
    command_line                   $USER1$/check_nrpe -t 55 -u -H $HOSTADDRESS$ -c check_disks -a $ARG1$ $ARG2$ $ARG3$
    }

# command 'nrpe'
define command{
    command_name                   nrpe
    command_line                   $USER1$/check_nrpe -t 55 -u -H $HOSTADDRESS$ -c $ARG1$
    }

# NRPE With Arguements
define command{
    command_name                   check_nrpe_a
    command_line                   $USER1$/check_nrpe -t 55 -u -H $HOSTADDRESS$ -c $ARG1$ -a $ARG2$ $ARG3$ $ARG4$
    }
#####################################
# Windows NSClient++ Checks
# command 'check_nt'
define command{
    command_name                   nt
    command_line                   $USER1$/check_nt -H $HOSTADDRESS$ -p 12489 -v $ARG1$ $ARG2$ -s $USER4$
    }

For safety purpose save the nscp clients password in /etc/naemon/resource.cfg

...........
...........
$USER4$=howtoforge
...........
............

Now we need to define the host config.

We create a file called linux.cfg.

$ vim /etc/naemon/conf.d/linux.cfg

define host {
  host_name                      centos6.sunil.cc
  alias                          Centos
  address                        192.168.1.21
  use                            linux-server
  hostgroups                     linux-servers
}
define host {
  host_name                      ubuntu.sunil.cc
  alias                          Ubuntu
  address                        192.168.1.182
  use                            linux-server
  hostgroups                     linux-servers
}

We do the same for the windows host.

$ vim /etc/naemon/conf.d/windows.cfg

define host {
  host_name                      ad.sunil.cc
  alias                          My Windows Server
  address                        192.168.1.75
  use                            windows-server
}

define hostgroup {
  hostgroup_name                 windows-servers
  alias                          Windows Servers
}

Now we need to define the service config.

$ vim linux_services.cfg

define service {
  service_description            Disks Status
  hostgroup_name                  linux-servers
  use                            generic-service                       
  check_command                  check_nrpe_a!check_disk!15%!5%
}
define service{
    use                            generic-service
    hostgroup_name                 linux-servers
    service_description            Load Average
    check_command                  check_nrpe_a!load!30,25,20!45,40,35
    }
define service{
    use                            generic-service
    hostgroup_name                 linux-servers
    service_description            Memory Usage
    check_command                  check_nrpe_a!memory!80!90
    }

For Windows, we create a similar config.

$ vim window_services.cfg

define service{
    use                            generic-service
    hostgroup_name                 windows-servers
    service_description            Disk - C:
    check_command                  nt!USEDDISKSPACE!-l c -w 80 -c 90
     }
define service{
    use                            generic-service
    hostgroup_name                 windows-servers
    service_description            Load Average
    check_command                  nt!CPULOAD!-l 60,90,95
    }
define service{
    use                            generic-service
    hostgroup_name                 windows-servers
    service_description            Memory Usage
    check_command                  nt!MEMUSE!-w 90 -c 95
    }

Now we will change the contact email address.

$ vim contacts.cfg

define contact {
  contact_name                   naemonadmin                         ; Short name of user
  alias                          Naemon Admin                        ; Full name of user
  use                            generic-contact                     ; Inherit default values from generic-contact template (defined above)
  email                          [email protected]             ; <<***** CHANGE THIS TO YOUR EMAIL ADDRESS ******
}

We now remove the unnecessary configs which are not required.

$ mv switch.cfg switch.cfg.bkp

$ mv printer.cfg printer.cfg.bkp

To validate the configs.

$ naemon -v /etc/naemon/naemon.cfg

Naemon Core 1.0.6-pkg
Copyright (c) 2013-present Naemon Core Development Team and Community Contributors
Copyright (c) 2009-2013 Nagios Core Development Team and Community Contributors
Copyright (c) 1999-2009 Ethan Galstad
License: GPL

Website: http://www.naemon.org
Reading configuration data...
   Read main config file okay...
   Read object config files okay...

Running pre-flight check on configuration data...

Checking objects...
        Checked 20 services.
        Checked 4 hosts.
        Checked 1 contacts.
        Checked 2 host groups.
        Checked 0 service groups.
        Checked 1 contact groups.
        Checked 29 commands.
        Checked 5 time periods.
        Checked 0 host escalations.
        Checked 0 service escalations.
Checking for circular paths...
        Checked 4 hosts
        Checked 0 service dependencies
        Checked 0 host dependencies
        Checked 5 timeperiods
Checking global event handlers...
Checking obsessive compulsive processor commands...
Checking misc settings...

Total Warnings: 0
Total Errors:   0

Things look okay - No serious problems were detected during the pre-flight check
-sh-4.2$

Login as root and restart naemon service.

[[email protected] conf.d]# systemctl restart naemon
[[email protected] conf.d]# systemctl status naemon
? naemon.service - Naemon Monitoring Daemon
   Loaded: loaded (/usr/lib/systemd/system/naemon.service; enabled; vendor preset: disabled)
   Active: active (running) since Thu 2017-03-09 19:14:36 CET; 7s ago
     Docs: http://naemon.org/documentation
  Process: 5112 ExecStart=/usr/bin/naemon --daemon /etc/naemon/naemon.cfg (code=exited, status=0/SUCCESS)
  Process: 5110 ExecStartPre=/usr/bin/chown -R naemon:naemon /var/run/naemon/ (code=exited, status=0/SUCCESS)
  Process: 5108 ExecStartPre=/usr/bin/mkdir /var/run/naemon (code=exited, status=1/FAILURE)
 Main PID: 5114 (naemon)
   CGroup: /system.slice/naemon.service
           ??5114 /usr/bin/naemon --daemon /etc/naemon/naemon.cfg
           ??5115 /usr/bin/naemon --worker /var/lib/naemon/naemon.qh
           ??5116 /usr/bin/naemon --worker /var/lib/naemon/naemon.qh
           ??5117 /usr/bin/naemon --worker /var/lib/naemon/naemon.qh
           ??5118 /usr/bin/naemon --worker /var/lib/naemon/naemon.qh
           ??5119 /usr/bin/naemon --daemon /etc/naemon/naemon.cfg

Mar 09 19:14:36 naemon.sunil.cc systemd[1]: Starting Naemon Monitoring Daemon...
Mar 09 19:14:36 naemon.sunil.cc systemd[1]: Failed to read PID from file /var/run/naemon/naemon.pid: Invalid argument
Mar 09 19:14:36 naemon.sunil.cc systemd[1]: Started Naemon Monitoring Daemon.
[[email protected] conf.d]#

Login to dashboard and you should see the services up and running.

We see that services fail for Ubuntu host.

It is seen that nrpe package compiled for ubuntu had enable arguments disabled for security vulnerabily and that is the reason it is failing

We will need to recompile the package to enable arguments, to manage the tuning from naemon.

The below link shows you how it can be recompiled. You also find the package already compiled with enable arguments in this site. I will be using this precompiled package for this tutorial.

https://www.claudiokuenzler.com/blog/626/nrpe-debian-jessie-command-ags-arguments-not-working-error

[email protected]:~# wget https://www.claudiokuenzler.com/downloads/nrpe/nagios-nrpe-server_2.15-1ubuntu2_amd64.xenial.deb

Install the package.

[email protected]:~# dpkg -i nagios-nrpe-server_2.15-1ubuntu2_amd64.xenial.deb
(Reading database ... 79576 files and directories currently installed.)
Preparing to unpack nagios-nrpe-server_2.15-1ubuntu2_amd64.xenial.deb ...
Unpacking nagios-nrpe-server (2.15-1ubuntu2) over (2.15-1ubuntu1) ...
Setting up nagios-nrpe-server (2.15-1ubuntu2) ...
Processing triggers for systemd (229-4ubuntu16) ...
Processing triggers for ureadahead (0.100.0-19) ...
Processing triggers for man-db (2.7.5-1) ...
[email protected]:~#

Restart NRPE.

[email protected]:~# systemctl restart nagios-nrpe-server.service

Now we are monitoring all the hosts using naemon.

Configuration of pnp4nagios

We will need to configure pnp4nagios for performance graph.

Now we will use the same authentication method as the thruk dashboard, we will first take a backup of the file and change the following lines.

[[email protected] conf.d]# cd /etc/httpd/conf.d/
[[email protected] conf.d]# cp pnp4nagios.conf pnp4nagios.conf.bkp
[[email protected] share]# cat /etc/httpd/conf.d/pnp4nagios.conf
# SAMPLE CONFIG SNIPPETS FOR APACHE WEB SERVER

Alias /pnp4nagios "/usr/local/pnp4nagios/share"

<Directory "/usr/local/pnp4nagios/share">
        AllowOverride None
        Order allow,deny
        Allow from all
        #
        # Use the same value as defined in nagios.conf
        #
        AuthName "Thruk Access"
        AuthType Basic
        AuthUserFile /etc/thruk/htpasswd
        Require valid-user
        
                # Turn on URL rewriting
                RewriteEngine On
                Options symLinksIfOwnerMatch
                # Installation directory
                RewriteBase /pnp4nagios/
                # Protect application and system files from being viewed
                RewriteRule "^(?:application|modules|system)/" - [F]
                # Allow any files or directories that exist to be displayed directly
                RewriteCond "%{REQUEST_FILENAME}" !-f
                RewriteCond "%{REQUEST_FILENAME}" !-d
                # Rewrite all other URLs to index.php/URL
                RewriteRule "^.*$" "index.php/$0" [PT]
        

[[email protected] share]#
[[email protected] conf.d]# systemctl restart httpd.service

Now we will need to change the config page.

[[email protected] share]# cd /usr/local/pnp4nagios/share/
[[email protected] share]# mv install.php install.php.txt

Now we will need to change the config file for pnp4nagios.

Change nagios to naemon in the config file.

[[email protected] conf.d]# vi /usr/local/pnp4nagios/etc/config_local.php
............................
................................
$conf['nagios_base'] = "/naemon/cgi-bin";
..................................
............................

Enable performance data from 0 to 1.

[[email protected] conf.d]# vi /etc/naemon/naemon.cfg
.....................
.....................
process_performance_data=1
......................
......................

Add the below lines to the bottom of the naemon.conf.

[[email protected] conf.d]# vi /etc/naemon/naemon.cfg

#
# service performance data
#
service_perfdata_file=/usr/local/pnp4nagios/var/service-perfdata
service_perfdata_file_template=DATATYPE::SERVICEPERFDATA\tTIMET::$TIMET$\tHOSTNAME::$HOSTNAME$\tSERVICEDESC::$SERVICEDESC$\tSERVICEPERFDATA::$SERVICEPERFDATA$\tSERVICECHECKCOMMAND::$SERVICECHECKCOMMAND$\tHOSTSTATE::$HOSTSTATE$\tHOSTSTATETYPE::$HOSTSTATETYPE$\tSERVICESTATE::$SERVICESTATE$\tSERVICESTATETYPE::$SERVICESTATETYPE$
service_perfdata_file_mode=a
service_perfdata_file_processing_interval=15
service_perfdata_file_processing_command=process-service-perfdata-file

#
#
# 
host_perfdata_file=/usr/local/pnp4nagios/var/host-perfdata
host_perfdata_file_template=DATATYPE::HOSTPERFDATA\tTIMET::$TIMET$\tHOSTNAME::$HOSTNAME$\tHOSTPERFDATA::$HOSTPERFDATA$\tHOSTCHECKCOMMAND::$HOSTCHECKCOMMAND$\tHOSTSTATE::$HOSTSTATE$\tHOSTSTATETYPE::$HOSTSTATETYPE$
host_perfdata_file_mode=a
host_perfdata_file_processing_interval=15
host_perfdata_file_processing_command=process-host-perfdata-file

Now we need to add the below lines in custom_commands.conf.

[[email protected] conf.d]# vim /etc/naemon/conf.d/custom_commands.cfg
define command{
       command_name    process-service-perfdata-file
       command_line    /bin/mv /usr/local/pnp4nagios/var/service-perfdata /usr/local/pnp4nagios/var/spool/service-perfdata.$TIMET$
}

define command{
       command_name    process-host-perfdata-file
       command_line    /bin/mv /usr/local/pnp4nagios/var/host-perfdata /usr/local/pnp4nagios/var/spool/host-perfdata.$TIMET$
}

Now we create a template for host performance and service performance graph.

$ cd /etc/naemon/conf.d/templates/
$ cat pnp.cfg
define host {
   name host-pnp
   process_perf_data 1
   action_url /pnp4nagios/index.php/graph?host=$HOSTNAME$&srv=_HOST_' class='tips' rel='/pnp4nagios/index.php/popup?host=$HOSTNAME$&srv=_HOST_
   register 0
}

define service {
   name service-pnp
   process_perf_data 1
   action_url /pnp4nagios/index.php/graph?host=$HOSTNAME$&srv=$SERVICEDESC$' class='tips' rel='/pnp4nagios/index.php/popup?host=$HOSTNAME$&srv=$SERVICEDESC$
   register 0
}

Now to access performance graph for services you need, we need to update the service.cfg file.

$ cat linux_services.cfg
define service {
  service_description            Disks Status
  hostgroup_name                  linux-servers
  use                            generic-service,service-pnp                       ; Name of service template to use
  check_command                  check_nrpe_a!check_disk!15%!5%
}
define service{
    use                            generic-service,service-pnp
    hostgroup_name                 linux-servers
    service_description            Load Average
    check_command                  check_nrpe_a!load!30,25,20!45,40,35
    }
define service{
    use                            generic-service,service-pnp
    hostgroup_name                 linux-servers
    service_description            Memory Usage
    check_command                  check_nrpe_a!memory!80!90
    }
$ cat window_services.cfg
define service{
    use                            generic-service,service-pnp
    hostgroup_name                 windows-servers
    service_description            Disk - C:
    check_command                  nt!USEDDISKSPACE!-l c -w 80 -c 90
     }
define service{
    use                            generic-service,service-pnp
    hostgroup_name                 windows-servers
    service_description            Load Average
    check_command                  nt!CPULOAD!-l 60,90,95
    }
define service{
    use                            generic-service,service-pnp
    hostgroup_name                 windows-servers
    service_description            Memory Usage
    check_command                  nt!MEMUSE!-w 90 -c 95
    }

To check host graph, we need to include it in below file.

$ cat linux.cfg
define host {
  host_name                      centos6.sunil.cc
  alias                          Centos
  address                        192.168.1.21
  use                            linux-server,host-pnp
  hostgroups                     linux-servers
}
define host {
  host_name                      ubuntu.sunil.cc
  alias                          Ubuntu
  address                        192.168.1.182
  use                            linux-server,host-pnp
  hostgroups                     linux-servers
}
$ cat windows.cfg
define host {
  host_name                      ad.sunil.cc
  alias                          My Windows Server
  address                        192.168.1.75
  use                            windows-server,host-pnp
}

define hostgroup {
  hostgroup_name                 windows-servers
  alias                          Windows Servers
}

Validate the config.

$ naemon -v /etc/naemon/naemon.cfg

Naemon Core 1.0.6-pkg
Copyright (c) 2013-present Naemon Core Development Team and Community Contributors
Copyright (c) 2009-2013 Nagios Core Development Team and Community Contributors
Copyright (c) 1999-2009 Ethan Galstad
License: GPL

Website: http://www.naemon.org
Reading configuration data...
   Read main config file okay...
   Read object config files okay...

Running pre-flight check on configuration data...

Checking objects...
        Checked 20 services.
        Checked 4 hosts.
        Checked 1 contacts.
        Checked 2 host groups.
        Checked 0 service groups.
        Checked 1 contact groups.
        Checked 31 commands.
        Checked 5 time periods.
        Checked 0 host escalations.
        Checked 0 service escalations.
Checking for circular paths...
        Checked 4 hosts
        Checked 0 service dependencies
        Checked 0 host dependencies
        Checked 5 timeperiods
Checking global event handlers...
Checking obsessive compulsive processor commands...
Checking misc settings...

Total Warnings: 0
Total Errors:   0

Things look okay - No serious problems were detected during the pre-flight check

Restart the services.

[[email protected] ~]# systemctl enable npcd
npcd.service is not a native service, redirecting to /sbin/chkconfig.
Executing /sbin/chkconfig npcd on
[[email protected] ~]# systemctl restart npcd
[[email protected] ~]# systemctl restart naemon

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From: Karikal

Excellent documentation for Naemon production implementation.