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Showing posts with label Nagios. Show all posts
Showing posts with label Nagios. Show all posts

Wednesday, April 23, 2014

Creating a custom Nagios function

Nagios Exit Codes
Exit Code Status
0 OK
1 WARNING
2 CRITICAL
3 UNKNOWN
Create the Script to be added as the Plugin

#!/bin/bash
used_space=`df -h / | grep -v Filesy | awk '{print $5}' | sed 's/%//g'`
case $used_space in
[1-84]*)
echo "OK - $used_space% of disk space used."
exit 0
;;
[85]*)
echo "WARNING - $used_space% of disk space used."
exit 1
;;
[86-100]*)
echo "CRITICAL - $used_space% of disk space used."
exit 2
;;
*)
echo "UNKNOWN - $used_space% of disk space used."
exit 3
;;
esac

try to put the script in same plugin directory with the other ones
/usr/lib/nagios/plugins/

make it executable
Add Your New Command to Nagios Checks on Nagios Monitoring Server

Define new command in /etc/nagios/objects/commands.cfg
define command{
command_name usedspace_bash
command_line $USER1$/check_nrpe -H $HOSTADDRESS$ -c usedspace_bash
}
Add Your Script to NRPE configuration on client host
command[usedspace_bash]=/usr/lib/nagios/plugins/usedspace.sh

 

adding to configuration
/etc/nagios/servers/<name-0f-config>.cfg
define service {
use generic-service
host_name Hostname
service_description Custom Disk Checker In Bash
check_command usedspace_bash
}

 

 

Tuesday, April 22, 2014

Adding ESXI to Nagios

yum install perl-Pod-Perldoc perl-CPAN openssl-devel
# wget http://dl.fedoraproject.org/pub/epel/6/i386/perl-Nagios-Plugin-0.35-1.el6.noarch.rpm
# wget http://mirror.centos.org/centos/6/os/i386/Packages/perl-Config-Tiny-2.12-7.1.el6.noarch.rpm
# wget http://mirror.centos.org/centos/6/os/i386/Packages/perl-Params-Validate-0.92-3.el6.i686.rpm
# rpm -ivh perl-Nagios-Plugin-0.35-1.el6.noarch.rpm perl-Config-Tiny-2.12-7.1.el6.noarch.rpm perl-Params-Validate-0.92-3.el6.i686.rpm
# cd /root
# tar xvzf VMware-vSphere-Perl-SDK-4.1.0-254719.i386.tar.gz
# cd vmware-vsphere-cli-distrib/
# ./vmware-install.pl

# cd /usr/lib/nagios/plugins/
Download check_esx3.pl and make it executable
http://exchange.nagios.org/components/com_mtree/attachment.php?link_id=2154&cf_id=29
chmod +x check_esx3.pl


vim /usr/local/nagios/etc/objects/vmware.cfg
First define all your hosts as shown below

# Host esx01
define host{
use vmware-server
host_name esxi01
alias VMWare ESXi 01
address IP Address
}
define host{
use vmware-server
host_name esxi02
alias VMWare ESXi 02
address IP Address
}
# Similarly you can define all the hosts

# Now define a hostgroup for your Esxi Hosts:

define hostgroup{
hostgroup_name Esxi-Servers ; The name of the hostgroup

alias Vmware Servers ; Long name of the group

members esxi01,esxi02
}

# Now create the service definition as shown below
# check cpu
define service{
use generic-service
host_name esxi01
service_description ESXi CPU Load
check_command check_esx_cpu!80!90
}

# check memory usage
define service{
use generic-service
host_name esxi01
service_description ESXi Memory usage
check_command check_esx_mem!80!90
}

# check net
define service{
use generic-service
host_name esxi01
service_description ESXi Network usage
check_command check_esx_net!102400!204800
}

# check runtime status
define service{
use generic-service
host_name esxi01
service_description ESXi Runtime status
check_command check_esx_runtime
}

# check io read
define service{
use generic-service
host_name esxi01
service_description ESXi IO read
check_command check_esx_ioread!40!90
}

# check io write
define service{
use generic-service
host_name esxi01
service_description ESXi IO write
check_command check_esx_iowrite!40!90
}

Define the commands related to ESXi in the /usr/local/nagios/etc/objects/command.cfg file

vim /usr/local/nagios/etc/objects/commands.cfg
# check vmware esxi machine
# check cpu
define command{
command_name check_esx_cpu
command_line $USER1$/check_esx -H $HOSTADDRESS$ -u $USER11$ -p $USER12$ -l cpu -s usage -w $ARG1$ -c $ARG2$
}

# check memory usage
define command{
command_name check_esx_mem
command_line $USER1$/check_esx -H $HOSTADDRESS$ -u $USER11$ -p $USER12$ -l mem -s usage -w $ARG1$ -c $ARG2$
}

# check net usage
define command{
command_name check_esx_net
command_line $USER1$/check_esx -H $HOSTADDRESS$ -u $USER11$ -p $USER12$ -l net -s usage -w $ARG1$ -c $ARG2$
}

# check runtime status
define command{
command_name check_esx_runtime
command_line $USER1$/check_esx -H $HOSTADDRESS$ -u $USER11$ -p $USER12$ -l runtime -s status
}

# check io read
define command{
command_name check_esx_ioread
command_line $USER1$/check_esx -H $HOSTADDRESS$ -u $USER11$ -p $USER12$ -l io -s read -w $ARG1$ -c $ARG2$
}

# check io write
define command{
command_name check_esx_iowrite
command_line $USER1$/check_esx -H $HOSTADDRESS$ -u $USER11$ -p $USER12$ -l io -s write -w $ARG1$ -c $ARG2$
}

Adding configuration to nagios

vim /usr/local/nagios/etc/nagios.cfg
cfg_file=/usr/local/nagios/etc/objects/vmware.cfg