#244: Configure NRPE for Remote Server Monitoring - Rmhibbert/oe2-group-c GitHub Wiki

Link to the ticket: https://rt.dataraster.com/Ticket/Display.html?id=244&results=5193d32cbc6cb93fdb9010ad9c5c5728

Install the NRPE server

install the nagios-nrpe-server

Description: On the DB server download nagios-nrpe-server

Command: sudo apt-get install nagios-nrpe-server

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NRPE Server configuration

edit the config file

Description: nano into the config file

Command: sudo nano /etc/nagios/nrpe.cfg

edit the allowed hosts

Description: In the config file add the allowed hosts

Command: allowed_hosts=127.0.0.1,::1,db-c

edit the disk check

Description: In the config file change the command so it checks the correct disk

Command: check_sda1=/usr/lib/nagios/plugins/check_disk -w 20% -c 10% -p /dev/sda1

Restart

Description: Restart the system

Command: sudo systemctl restart nagios-nrpe-server

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Nagios Server Configuration

Install plugin

Description: install the nagios-nrpe-plugin package

Command: sudo apt-get install nagios-nrpe-plugin

Create a new host group

Description: Create a Remote Disks host group to put DB-c in

Command:

#create new hostgroup for db nagios_hostgroup { "remote-disks": target => "/etc/nagios4/conf.d/ppt_hostgroups.cfg", mode => "0644", alias => "Remote Disks", members => "db-c", }

Create a new service

Description: create a new service that performs the disk check via NRPE

Command:
nagios_service { "remote-disks": service_description => "Remote Disks", hostgroup_name => "remote-disks", target => "/etc/nagios-plugins/config/check_nrpe.cfg", check_command => "check_sda1", max_check_attempts => 3, retry_check_interval => 1, normal_check_interval => 5, check_period => "24x7", notification_interval => 30, notification_period => "24x7", notification_options => "w,u,c", contact_groups => "admins", mode => "0644", }

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Create NRPE file structure

On the mgmt server create file structure

Description: change directory to modules

Command: cd /etc/puppetlabs/code/modules

Description: Create files

Command: sudo mkdir -p nrpe/files nrpe/templates nrpe/manifests

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Move nrpe file to modules

Description: copy the config file into modules

Command: sudo cp /etc/nagios/nrpe.cfg /etc/puppetlabs/code/modules/nrpe/files

Edit the file

Description: Add the allowed host to the config file

Command: allowed_hosts=127.0.0.1,::1,mgmt-c

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Create manifest files

Description: Create the init.pp install.pp service.pp config.pp

Command: sudo touch init.pp

Description: init.pp content

Command: class nrpe {include nrpe::install}

Description: service.pp content

Command:

class nrpe::service { service { "nagios-nrpe-server": ensure => running, hasstatus => true, hasrestart => true, enable => true, require => Class["nrpe::config"], } }

Description: config.pp content

Command:

class nrpe::config { file { "/etc/nagios/nrpe.cfg": ensure => present, source => "puppet:///modules/nrpe/files/npre.cfg", mode => "0444", owner => "root", group => "root", require => Class["nrpe::install"], notify => Class["nrpe::service"], } }

Description: install.pp content

Command:

class nrpe::install { package{"nagios-nrpe-server": ensure=>present } package { 'nagios-nrpe-plugin': ensure => installed, } }

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Fixes

syntax issue, add the members as 1 item not separate strings

use the correct target to the ppt_services.cfg on my service

Adding check_nrpe to check command on remote disks service

Add the server names to allowhosts in /etc/nagios/nrpe.cfg

edit the check to sdb1

then

sudo systemctl restart nagios-nrpe-server.service sudo systemctl status nagios-nrpe-server.service

sudo puppet agent --test