Set Up Nagios Monitoring Using Puppet Module

Create this file structure on the mgmt server

Using these commands

sudo mkdir nagios
cd nagios
sudo mkdir manifests
sudo mkdir files
sudo mkdir templates
cd manifests/
sudo touch {init.pp,install.pp,config.pp,service.pp}

Create a nagios group and a nagios user in /nagios/manifests/install.pp

class nagios::install { package { "nagios4": ensure => present, require => User["nagios"], }

    user { "nagios":
            ensure => present,
            comment => "Nagios user",
            gid => "nagios",
            shell => "/bin/false",
            require => Group["nagios"],
    }

    group { "nagios":
            ensure => present,
    }

    exec { 'install-puppet-nagios-plugin':
            command => '/opt/puppetlabs/bin/puppet module install puppetlabs-nagios_core>
            creates => '/etc/puppetlabs/code/environments/production/modules/nagios_core>
            require => Package['nagios4']
    }

}

Check each class is correct after creation so if there are errors, it is apparent where

Create the main nagios class in the init.pp files in manifests

sudo nano init.pp

In init.pp put this code

class nagios4 {
include nagios4::install
}

Check if the Class is configured correctly by going to

cd /etc/puppetlabs/code/environments/production/manifests sudo nano site.pp

And adding nagios to the db-a node

Run the puppetagent on the db-a server by running

sudo /opt/puppetlabs/puppet/bin/puppet agent --server=mgmt-a --no-daemonize --verbose --onetime

Check the status using

sudo systemctl status nagios4

On my first attempt I had nagios in the incorrect node, THUS the red