Installation & Configuration Documentation of Nagios

[root@localhost ~]# yum install httpd* -y

[root@localhost ~]# yum install gcc* -y

[root@localhost ~]# yum install gd* -y

[root@localhost ~]# yum install glibc* -y

[root@localhost ~]# /usr/sbin/useradd nagios

[root@localhost ~]# passwd nagios

Changing password for user nagios.

New UNIX password:

BAD PASSWORD: it is WAY too short

Retype new UNIX password:

passwd: all authentication tokens updated successfully.

[root@localhost ~]# /usr/sbin/groupadd nagcmd

[root@localhost ~]# /usr/sbin/usermod -G nagcmd nagios

[root@localhost ~]# /usr/sbin/usermod -G nagcmd apache

[root@localhost ~]# mkdir ~/downloads

[root@ns1 nagios server docs]# cp nagios-3.0.3.tar.gz ~/downloads/

[root@ns1 nagios server docs]# cp nagios-plugins-1.4.11.tar.gz ~/downloads/

[root@ns1 nagios server docs]# cd ~/downloads/

[root@ns1 downloads]# ls

nagios-3.0.3.tar.gz  nagios-plugins-1.4.11.tar.gz

[root@ns1 downloads]# tar -zxvf nagios-3.0.3.tar.gz

[root@ns1 downloads]# ls

nagios-3.0.3  nagios-3.0.3.tar.gz  nagios-plugins-1.4.11.tar.gz

[root@ns1 downloads]# cd nagios-3.0.3

 [root@ns1 nagios-3.0.3]# ls

base          configure.in    install-sh    nagios.spec    THANKS

cgi           contrib         LEGAL         OutputTrap.pm  update-version

Changelog     daemon-init.in  LICENSE       p1.pl          UPGRADING

common        functions       Makefile.in   pkginfo.in     xdata

config.guess  html            make-tarball  README

config.sub    include         mkpackage     sample-config

configure     INSTALLING      module        subst.in

[root@ns1 nagios-3.0.3]#./configure --with-command-group=nagcmd

[root@ns1 nagios-3.0.3]# make all

[root@ns1 nagios-3.0.3]# make install

[root@ns1 nagios-3.0.3]# make install-init

[root@ns1 nagios-3.0.3]# make install-commandmode

[root@ns1 nagios-3.0.3]# make install-config

[root@ns1 nagios-3.0.3]# make install-webconf

[root@ns1 nagios-3.0.3]# cd /usr/local/nagios/sbin/

[root@ns1 sbin]# ls

avail.cgi    histogram.cgi      showlog.cgi    statuswrl.cgi

cmd.cgi      history.cgi        status.cgi     summary.cgi

config.cgi   notifications.cgi  statusmap.cgi  tac.cgi

extinfo.cgi  outages.cgi        statuswml.cgi  trends.cgi

[root@ns1 sbin]# vim .htaccess

AuthName "Nagios Access"

AuthType Basic

AuthUserFile /usr/local/nagios/etc/htpasswd.users

require valid-user

[root@ns1 sbin]# chown apache .htaccess

[root@ns1 sbin]# chmod 644 .htaccess

[root@ns1 sbin]# cd ..

[root@ns1 nagios]# ls

bin  etc  libexec  sbin  share  var

[root@ns1 nagios]# cd share/

[root@ns1 nagios]# vim .htaccess

AuthName "Nagios Access"

AuthType Basic

AuthUserFile /usr/local/nagios/etc/htpasswd.users

require valid-user

[root@ns1 nagios]# chown apache .htaccess

[root@ns1 nagios]# chmod 644 .htaccess

[root@ns1 nagios]# htpasswd -bc /usr/local/nagios/etc/htpasswd.users nagiosadmin 123456

Adding password for user nagiosadmin

[root@ns1 nagios-plugins-1.4.11]# cd /usr/local/nagios/etc/

[root@ns1 etc]# vim htpasswd.users

nagiosadmin:F7776tsdeZhh6

[root@ns1 nagios]# chown apache /usr/local/nagios/etc/htpasswd.users

[root@ns1 nagios]# chmod 644 /usr/local/nagios/etc/htpasswd.users

[root@ns1 nagios]# chkconfig httpd on

[root@ns1 nagios]# /etc/init.d/httpd restart

Stopping httpd:                                            [  OK  ]

Starting httpd:                                              [  OK  ]

[root@ns1 downloads]# cd ~/downloads/

[root@ns1 downloads]# ls

nagios-3.0.3  nagios-3.0.3.tar.gz  nagios-plugins-1.4.11.tar.gz

[root@ns1 downloads]# tar -zxvf nagios-plugins-1.4.11.tar.gz

[root@ns1 downloads]# ls

nagios-3.0.3         nagios-plugins-1.4.11

nagios-3.0.3.tar.gz  nagios-plugins-1.4.11.tar.gz

[root@ns1 downloads]# cd nagios-plugins-1.4.11

[root@ns1 nagios-plugins-1.4.11]# ls

ABOUT-NLS         config.rpath  m4                   plugins-scripts

acinclude.m4      config_test   Makefile.am          po

ACKNOWLEDGEMENTS  configure     Makefile.in          README

aclocal.m4        configure.in  mkinstalldirs        REQUIREMENTS

AUTHORS           contrib       nagios-plugins.spec  SUPPORT

BUGS              COPYING       NEWS                 test.pl.in

build-aux         FAQ           NPTest.pm            THANKS

ChangeLog         gl            perlmods             tools

CODING            INSTALL       pkg

command.cfg.in    LEGAL         plugins

config.h.in       lib           plugins-root

[root@ns1 nagios-plugins-1.4.11]# ./configure --with-nagios-user=nagios --with-nagios-group=nagios

[root@ns1 nagios-plugins-1.4.11]# make all

[root@ns1 nagios-plugins-1.4.11]# make install

[root@ns1 nagios-plugins-1.4.11]# chkconfig --add nagios

[root@ns1 nagios-plugins-1.4.11]# chkconfig nagios on

[root@ns1 nagios-plugins-1.4.11]# /usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg

[root@ns1 nagios-plugins-1.4.11]# service nagios start

Starting nagios: done.

[root@ns1 etc]# vim /usr/local/nagios/etc/nagios.cfg

cfg_file=/usr/local/nagios/etc/objects/switch.cfg

[root@ns1 etc]# cd /usr/local/nagios/etc/objects/

[root@ns1 objects]# ls

commands.cfg  localhost.cfg  switch.cfg     timeperiods.cfg

contacts.cfg  printer.cfg    templates.cfg  windows.cfg

[root@ns1 objects]# vim switch.cfg

define service{

        use                     generic-service ; Inherit values from a template

        host_name               DHK15   ; The name of the host the service is associated with

        service_description     PING            ; The service description

        check_command           check_ping!200.0,20%!600.0,60%  ; The command           used       to  monitor the service

        normal_check_interval   5               ; Check the service every 5 minutes under normal conditions

                                                              62,0-1        51%

  retry_check_interval    1               ; Re-check the service every minute until its final/hard state is determined

        }

# Monitor uptime via SNMP

define service{

        use                     generic-service ; Inherit values from a template

        host_name               DHK15

        service_description     Uptime

        check_command           check_snmp!-C public -o sysUpTime.0

        }

# Monitor Port 1 status via SNMP

define service{

        use                     generic-service ; Inherit values from a template

        host_name               DHK15

        service_description     Port 1 Link Status

        check_command           check_snmp!-C public -o ifOperStatus.1 -r 1 -m RFC1213-MIB

        }

# Monitor bandwidth via MRTG logs

define service{

        use                     generic-service ; Inherit values from a template

        host_name               DHK15

        service_description     Port 1 Bandwidth Usage

        check_command           check_local_mrtgtraf!/var/lib/mrtg/192.168.1.253_1.log!AVG!1000000,1000000!5000000,5000000!10

        }

[root@ns1 objects]# /etc/rc.d/init.d/nagios reload

Running configuration check...done.

Reloading nagios configuration...done

For Creat another device :
[root@ns1 objects]# vim /usr/local/nagios/etc/nagios.cfg

cfg_file=/usr/local/nagios/etc/objects/router.cfg

[root@ns1 objects]# cp switch.cfg router.cfg

[root@ns1 objects]# ls

commands.cfg  localhost.cfg  router.cfg  templates.cfg    windows.cfg

contacts.cfg  printer.cfg    switch.cfg  timeperiods.cfg

[root@ns1 objects]# vim router.cfg

# Create a service to PING to switch

define service{

        use                     generic-service ; Inherit values from a template

        host_name               DHK14   ; The name of the host the service is associated with

        service_description     PING            ; The service description

        check_command           check_ping!200.0,20%!600.0,60%  ; The command used to monitor the service

        normal_check_interval   5               ; Check the service every 5 minutes under normal conditions

        retry_check_interval    1               ; Re-check the service every minute until its final/hard state is determined

        }

# Create a new hostgroup for switches

define hostgroup{

        hostgroup_name  router          ; The name of the hostgroup

        alias           Network Switches        ; Long name of the group

        }

define service{

        use                     generic-service ; Inherit values from a template

        host_name               DHK14   ; The name of the host the service is associated with

        service_description     PING            ; The service description

        check_command           check_ping!200.0,20%!600.0,60%  ; The command used to monitor the service

        normal_check_interval   5               ; Check the service every 5 minutes under normal conditions

        retry_check_interval    1               ; Re-check the service every minute until its final/hard state is determined

        }

# Monitor uptime via SNMP

define service{

        use                     generic-service ; Inherit values from a template

        host_name               DHK14

        service_description     Uptime

        check_command           check_snmp!-C public -o sysUpTime.0

        }

# Monitor Port 1 status via SNMP

define service{

        use                     generic-service ; Inherit values from a template

        host_name               DHK14

        service_description     Port 1 Link Status

        check_command           check_snmp!-C public -o ifOperStatus.1 -r 1 -m RFC1213-MIB

        }

# Monitor bandwidth via MRTG logs

define service{

        use                     generic-service ; Inherit values from a template

        host_name               DHK14

        service_description     Port 1 Bandwidth Usage

        check_command           check_local_mrtgtraf!/var/lib/mrtg/192.168.1.253_1.log!AVG!1000000,1000000!5000000,5000000!10

        }

[root@ns1 objects]# /usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg

[root@ns1 objects]# /etc/rc.d/init.d/nagios reload

Running configuration check...done.

Reloading nagios configuration...done

We should now be able to access the Nagios web interface at the URL below. We'll be prompted for the username (nagiosadmin) and password we specified earlier.

http://localhost/nagios/

 

[root@localhost ~]# cd /usr/local/nagios/
[root@localhost nagios]# ls
 bin  etc  libexec  sbin  share  var
[root@localhost nagios]# mv share share.bak

[root@localhost nagios]# ll
total 28
drwxrwxr-x 2 nagios nagios 4096 Jan  3 18:40 bin
drwxrwxr-x 3 nagios nagios 4096 Jan  3 18:42 etc
drwxrwxr-x 2 nagios nagios 4096 Jan  3 18:47 libexec
drwxrwxr-x 2 nagios nagios 4096 Jan  3 18:41 sbin
drwxr-xr-x 3 root   root   4096 Dec 19 18:45 share
drwxrwxr-x 9 nagios nagios 4096 Jan  3 18:47 share.bak
drwxrwxr-x 5 nagios nagios 4096 Jan  3 19:17 var
You have new mail in /var/spool/mail/root
[root@localhost nagios]# chown -R nagios.nagios share
[root@localhost nagios]# ll
total 28
drwxrwxr-x 2 nagios nagios 4096 Jan  3 18:40 bin
drwxrwxr-x 3 nagios nagios 4096 Jan  3 18:42 etc
drwxrwxr-x 2 nagios nagios 4096 Jan  3 18:47 libexec
drwxrwxr-x 2 nagios nagios 4096 Jan  3 18:41 sbin
drwxr-xr-x 3 nagios nagios 4096 Dec 19 18:45 share
drwxrwxr-x 9 nagios nagios 4096 Jan  3 18:47 share.bak
drwxrwxr-x 5 nagios nagios 4096 Jan  3 19:18 var
[root@localhost nagios]# chmod 775 share
[root@localhost nagios]# /etc/init.d/nagios reload
Running configuration check...done.
Reloading nagios configuration...done