NAGIOS
Configuration
Firewall and SElinux
is Disable
Server IP :-
192.168.0.10
Hostname :-
shashi.example.com
Client IP :-
192.168.0.11
Hostname :-
client.example.com
1.Package
Requirement :-
# yum install httpd php
# yum install gcc glibc
glibc-common
# yum install gd
gd-devel
2.Create Nagios user
and group :-
# useradd -m nagios
# passwd nagios
# usermod -G nagios nagios
# groupadd nagcmd
# groupadd nagcmd
# usermod -a -G
nagcmd nagios
# usermod -a -G
nagcmd apache
3.Download Some
Package :-
# mkdir /opt/shashi/
# cd /opt/shashi
3.2.3.tar.gz
plugins-1.4.11.tar.gz
# tar xvf
nagios-3.2.3.tar.gz
# cd nagios-3.2.3
# ./configure
--with-command-group=nagcmd
# make all
# make install
# make install-init
# make install-config
# make
install-commandmode
# make install-webconf
35: change --->
email youadmin-mail-ID
htpasswd -c
/usr/local/nagios/etc/htpasswd.users nagiosadmin
New password :
Re-type new password :
Note:-
If you want to change admin “nagiosadmin” name change all in
“/usr/local/nagios/etc/cgi.cfg” file too.
7. Go to this Path
:-
# cd /opt/shashi
# tar xvf
nagios-plugin-1.4.11.tar.gz
# cd
nagios-plugin-1.4.11
# ./configure - -
with-nagios-user=nagios - - with-nagios-group=nagios
# make
# make install
# chkconfig - - add
nagios
# chkconfig nagios on
# /etc/init.d/nagios
start
# /etc/init.d/nagios
restart
# chkconfig nagios on
# /etc/init.d/httpd restart
#chkconfig httpd on
# /etc/init.d/httpd restart
#chkconfig httpd on
#
/usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg
(check nagios)
Total warnings: 0
Total Errors: 0
Things look okay – No
serious problems
8.Login to web
interface :-
username :- nagiosadmin
passwd :- *******
9.Package
Requirement :-
# yum install
openssl-devel xinetd
# cd /opt/shashi
2.x/nrpe-2.13/nrpe-2.13.tar.gz/download
# tar xvf
nrpe-2.13.tar.gz
# cd nrpe
# ./configure
General Options:
-------------------------
NRPE port:5666
NRPE user:nagios
NRPE group:nagios
Nagios user: nagios
Nagios group: nagios
# make all
# make install-plugin
# make install-daemon
# make
install-daemon-config
# make install-xinetd
10.Enter the
following entry :-
# vim
/etc/xinetd.d/nrpe
only_from = 127.0.0.1
192.168.0.10 (nagios_ip_address
)
11.Now, add entry
for nrpe daemon to /etc/services file :-
# vim /etc/services
nrpe
5666/tcp # NRPE
# service xinetd
restart
# chkconfig xinetd on
12.Test NRPE Daemon
Install :-
# netstat -at |grep
nrpe
Output
should be :
tcp 0 0
*:nrpe *.* LISTEN
13.Check NRPE Service
:-
#
/usr/local/nagios/libexec/check_nrpe -H 192.168.0.10
Output
should be NRPE version:
NRPE v2.12
-: CLIENT SETUP :-
1.Package
Requirement :-
#
yum install openssl-devel xinetd
#
yum install httpd php
#
yum install gcc glibc glibc-common
#
yum install gd gd-devel
2.Create Nagios user
and group :-
# useradd -m nagios
# passwd nagios
# usermod -G nagios nagios
# usermod -G nagios nagios
# groupadd nagcmd
# usermod -a -G
nagcmd nagios
#
usermod -a -G nagcmd apache
3.Create a Directary
shashi :-
#
mkdir /opt/shashi
#
cd /opt/shashi
#
tar -xvf nrpe-2.13.tar.gz
#
cd nrpe
#
./configure
General
Options:
-------------------------
NRPE
port: 5666
NRPE
user: nagios
NRPE
group: nagios
Nagios
user: nagios
Nagios
group: nagios
#
make all
#
make install-plugin
#
make install-daemon
#
make install-daemon-config
#
make install-xinetd
Enter
the following entry in :-
#
vim /etc/xinetd.d/nrpe
only_from
= 127.0.0.1 <192.168.0.10>(nagios_ip_address)
4.Now, add entry for
nrpe daemon to /etc/services file
#
vim /etc/services
nrpe 5666/tcp # NRPE
#
service xinetd start
#
service xinetd restart
#
chkconfig xinetd on
5.Test NRPE Daemon
Install
#
netstat -at |grep nrpe
Output
should be:
tcp
0 0 *:nrpe *.* LISTEN
This command run by SERVER SIDE :-
#
/usr/local/nagios/libexec/check_nrpe -H 192.168.0.11 (client IP)
NRPE
v2.12
#
cd /opt/shashi
#
tar xvf nagios-plugins-1.4.11.tar.gz
#
cd nagios-plugins-1.4.11
#
./configure --with-nagios-user=nagios --with-nagios-group=nagios
#
make
#
make install
#
chkconfig --add nagios
#
chkconfig nagios on
#
/usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg
Total
Warnings: 0
Total
Errors: 0
Things
look okay - No serious problems were detected during the pre-flight
check
6.All Plugin :-
#
cd /usr/local/nagios/libexec
#
cp check_http check_tomcat
#
cp check_http check_jboss
GO TO SERVER SIDE :-
#
vim /usr/local/nagios/etc/nagios.cfg
>Definitions
for monitoring the local (Linux) host
cfg_file=/usr/local/nagios/etc/objects/localhost.cfg (add
line)
cfg_file=/usr/local/nagios/etc/objects/client.cfg
(add line)
#
vim /usr/local/nagios/etc/objects/client.cfg
define host {
name
client ; Name of this template
use
generic-host ; Inherit default values
check_period
24x7
check_interval
5
retry_interval
1
max_check_attempts
10
check_command
check-host-alive
notification_period
24x7
notification_interval
30
notification_options
d,r
contact_groups
admins
register
0 ; DONT REGISTER THIS - ITS A
TEMPLATE
}
define
host {
use
client ; Inherit default values from a
template
host_name
client ; The name we're giving to this server
alias
client ; A longer name for the server
address
192.168.0.11 ; IP address of the server
}
define
service {
use local-service
host_name client
service_description PING
check_command check_ping!100.0,20%!500.0,60%
}
define
service {
use local-service ; Name
of service template to use
host_name client
service_description Disk Space
check_command check_disk!20%!10%!/
}
define
service {
use local-service ;
Name of service template to use
host_name client
service_description Total Processes
check_command check_local_procs!150!300!RSZDT
}
define
service {
use local-service
; Name of service template to use
host_name client
service_description HTTP
check_command check_http
notification_interval 0 ; set > 0 if you
want to be renotified
}
define
service {
use
local-service
host_name
client
service_description
MySQL connection-time
check_command
check_mysql_health!root!XXXX!connection-time
notifications_enabled
1
}
#define
service {
use
local-service
host_name
client
service_description
Tomcat
check_command
check_tomcat
}
define
service {
use local-service
host_name client
service_description Jboss
check_command check_jboss
}
define
service {
use local-service
host_name client
service_description SSH
check_command check_ssh
}
define service {
use
local-service ; Name of service template to use
host_name client
service_description Current Users
check_command
check_local_users!20!50
}
#
vim /usr/local/nagios/etc/objects/command.cfg
################################################################################
#
NOTE: The following 'check_...' commands are used to monitor
services on
#
both local and remote hosts.
################################################################################
#
'check_load' command definition
define
command {
command_name check_procs
command_line $USER1$/check_procs -w $ARG1$ -c $ARG2$ -s
$ARG3$
}
#
'check_ftp' command definition
define
command {
command_name check_ftp
command_line $USER1$/check_ftp -H $HOSTADDRESS$ $ARG1$
}
#
'check_http' command definition
define
command {
command_name check_http
command_line $USER1$/check_http -H $HOSTADDRESS$ -w
10 -c 20
}
#
'check_ssh' command definition
define
command {
command_name check_ssh
command_line $USER1$/check_ssh
$ARG1$ $HOSTADDRESS$
}
#
'check_ping' command definition
define
command {
command_name check_ping
command_line $USER1$/check_ping -H $HOSTADDRESS$ -w $ARG1$
-c $ARG2$ -p 5
}
#
'check_remote_users' command definition
define
command {
command_name check_remote_users
command_line $USER1$/check_users -w $ARG1$ -c $ARG2$
}
#
'check_disk' command defintion
define
command {
command_name
check_disk
command_line
$USER1$/check_disk -w 20% -c 10% -p /dev/sda1
}
#
'check_mysql'comman definition
define
command {
command_name
check_mysql_health
command_line
$USER1$/check_mysql_health -H $HOSTADDRESS$ --user $ARG1$
--password $ARG2$ --mode $ARG3$
}
#
'check_tomcat'comman definition
define
command {
command_name check_tomcat
command_line $USER1$/check_tomcat
-H $HOSTADDRESS$ -p 8080 -w 4 -c 5
}
#'check_jboss'command
definition
define
command{
command_name check_jboss
command_line $USER1$/check_jboss
-H $HOSTADDRESS$ -p 4444 -w 4 -c 5
}
Check
Configuration :-
#
/usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg
#
/etc/init.d/nagios restart
#########################
Now Enjoy Working with Nagios ###########################
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