Ashokkumar1125/nagios

# nagios

Refer this doc:    https://blog.serverdensity.com/howto-install-nagios-in-30-minutes-and-jumpstart-your-monitoring/

      ###############Pre-requisites###########
      apt-get update
      sudo apt-get install apache2 libapache2-mod-php5 php5 apache2-utils
      sudo a2enmod rewrite
      sudo a2enmod cgi
      sudo addgroup --system nagios
      sudo addgroup --system nagioscmd
     
     ##################install nagios server ####################
     curl -L -O https://assets.nagios.com/downloads/nagioscore/releases/nagios-4.1.1.tar.gz
     tar xvzf nagios-4.1.1.tar.gz
     cd nagios-4.1.1/
     ls -lrt
     make all
     sudo make install
     sudo service apache2 restart
     
     
     ##################  nagios plugins  ###########################
     $ curl -L -O http://nagios-plugins.org/download/nagios-plugins-2.1.1.tar.gz
     cd nagios-plugins-2.1.1/
     make
     sudo make install
     
     
     ################## nrpe client  ##################
     
     https://tecadmin.net/install-nrpe-on-ubuntu/
     sudo apt-get update
      sudo apt-get install nagios-nrpe-server nagios-plugins
      allowed_hosts=127.0.0.1, 192.168.1.100
      sudo /etc/init.d/nagios-nrpe-server restart
      
      ###################
     
     curl -L -O http://downloads.sourceforge.net/project/nagios/nrpe-2.x/nrpe-2.15/nrpe-2.15.tar.gz 
     tar -xf nrpe-2.15.tar.gz 
     cd nrpe-2.15/
     ls -lrt
     make all
     sudo make install
     sudo make install-xinetd
     sudo make install-daemon-config
     ifconfig
     sudo vi /etc/xinetd.d/nrpe
     sudo service xinetd restart
     sudo vi /usr/local/nagios/etc/nagios.cfg
     sudo mkdir /usr/local/nagios/etc/servers
     sudo vi /usr/local/nagios/etc/objects/contacts.cfg
     sudo vi /usr/local/nagios/etc/objects/commands.cfg
     sudo service nagios start
     ifconfig
     
     
     
     
     
     ###########
     
     
     nrpe client:
     
      sudo apt-get install nagios-plugins nagios-nrpe-server
       sudo vi /etc/nagios/nrpe.cfg
  
  
     add server name in allowed_host in nrpe.cfg file.





cfg file:

 cat chefclient.cfg 
define host {
use                             linux-server
host_name                       chefclient.example.com
alias                           My LAMP server
address                         192.168.32.20
max_check_attempts              5
check_period                    24x7
notification_interval           30
notification_period             24x7
}

define service {
use                             generic-service
host_name                       chefclient.example.com
service_description             PING
check_command                   check_ping!100.0,20%!500.0,60%
}

define service {
use                             generic-service
host_name                       chefclient.example.com
service_description             SSH
check_command                   check_ssh
}

define service {
use                             generic-service
host_name                       chefclient.example.com
service_description             Current Load
check_command                   check_nrpe!check_load
}

define service {
use                             generic-service
host_name                       chefclient.example.com
service_description             Current Users
check_command                   check_nrpe!check_users
}

define service {
use                             generic-service
host_name                       chefclient.example.com
service_description             Disk Utilization
check_command                   check_nrpe!check_sda1
}

define service {
use                             generic-service
host_name                       chefclient.example.com
service_description             Zombie processes
check_command                   check_nrpe!check_zombie_procs
}

define service {
use                             generic-service
host_name                       chefclient.example.com
service_description             Total processes
check_command                   check_nrpe!check_total_procs
}