neillturner / nagios Goto Github PK

Overview
========

The creates nagios server and clients that will interact with a puppetmaster be added automatically to the nagios server. 
You must have a puppetmaster installed with stored configs setup. 
It uses the puppet nagios export commands. 
This works on Centos 64 bit. With need changes for other platforms. 


To define a server: 
   class { 'nagios': }
	class { 'nagios::server': 
	    require => Class['nagios']
	} 
	
On a client: 
   1. Use a nrpe module like pdxcat-nrpe, http://forge.puppetlabs.com/pdxcat/nrpe, to install nrpe on all clients including the nagios server 
    
   class { 'nrpe':
    allowed_hosts => ['127.0.0.1', 'monitor.pibenchmark.com'],
	require => Class['ntp']
  }
 
  2. Change the nrpe.cfg to have the required commands installed (probably a cleaner way to do this)
  a. edit the file nrpe.cfg and change 
   allowed_hosts=127.0.0.1
  to 
   #allowed_hosts=127.0.0.1
   allowed_hosts=127.0.0.1,99.99.99.99  
  where 99.99.99.99is the nagios ip address 
  
  b. replace the nrpe.cfg with this new file  
  
  exec { 'save old nrpe.cfg':
     command     => "cp -f nrpe.cfg nrpe.cfg.old",
     cwd         => "/etc/nagios",
     require    =>  Class['nrpe'] 
   }  
 
 # npre config file
  file {'new nrpe.cfg':
    ensure    => present,
	path      => '/etc/nagios/nrpe.cfg.new',
    source    => 'puppet:///modules/nagios/nrpe.cfg',
	require   =>  Exec['save old nrpe.cfg'] 
  }
  
  exec { 'move nrpe.cfg':
     command     => "mv -f nrpe.cfg.new nrpe.cfg",
     cwd         => "/etc/nagios",
     require    =>  File['new nrpe.cfg'] 
   }  
   c. restart the nrpe service
    exec { 'restart the nrpe service':
     command     => "service nrpe restart",
     cwd         => "/tmp",
     require    =>   Exec['move nrpe.cfg']
   }    
   
 
 3. Export the client host to puppet so it will be added automatically to the nagios server. 
   class { 'nagios::export' :
     require => Exec['restart the nrpe service']
   } 
 
Once this is working add additional checks for services etc. 


Based on 

    http://www.allgoodbits.org/articles/view/31
    http://www.allgoodbits.org/articles/view/32
	

DEBUGGING

To debug nagios config file errors run  
   nagios -v /etc/nagios/nagios.cfg
   
To test that the nrpe is running commands run on the nagios server    
   /usr/lib64/nagios/plugins/check_nrpe -H client.example.com -c check_load  
where client.example.com  is the client hostname