Nagios

Sissejuhatus

Nagios on vabavaraline arvutite, teenuste ja võrgu monitoorimise programm.

Install

FreeBSD

cd /usr/ports/net-mgmt/nagios && make install clean
cd /usr/ports/net-mgmt/nagios-plugins && make install clean

Gentoo

emerge nagios
emerge nagios-plugins

Debian

apt-get install nagios ?

...

Konfime nagiose

Näide

Oletame ,et meil on kolm masinat mida vaja jälgida. Ruuter, veebiserver ja mailiserver. Me soovime ,et kõiki neid kolme nagios pingiks iga viie minuti tagant ning kui üks masin juhtub maas olema siis teavitame sellest mailiaadressile helpdesk@domeen.ee

ip aadressidega

ruuter 192.168.1.1

veebiserver 192.168.1.2

mailiserver 192.168.1.3

Eesimesena on vaja defineerida hosts.cfg failis kõik kolm masinat

hosts.cfg

define host{
        name                            linux-server
        use                             generic-host    
        check_period                    24x7            
        max_check_attempts              10            
        check_command                   check-host-alive 
        notification_period             workhours                                                                                                                  
        notification_interval           120             
        notification_options            d,u,r          
        contact_groups                  admins          
        register                        0               
        }
 
define host{
      use                     linux-server
      host_name               isp
      alias                   ISP Ruuter
      address                 192.168.1.10
      parents                 localhost
      contact_groups  Helpdesk
      }

Nüüd defineerime kontrollid mida tehakse antud serveritele. Tekitame service kirje mis pingib kõiki kolme masinat. Ruuterit, veebiserverit ja mailiserverit ning teavitab probleemide korral kontaktgruppi helpdesk

services.cfg

define service{
      use                             local-service         ; Name of service template to use
      host_name                       isp, www.tartu.ee, mail.tartu.ee
      service_description             PING
      check_command                   check_ping!100.0,20%!500.0,60%
      contact_groups  Helpdesk
      }

Lõpuks tekitame kolmanda faili kus kirjas kontaktid keda teavitatakse mõne seadme maasolekul.

Loome kontakti helpdesk mailiga helpdesk@domeen.ee ning lisame selle kontaktgruppi Helpdesk

contacts.cfg

define contact{
      contact_name                    helpdesk
      alias                           IT Helpdesk
      service_notification_period     24x7
      host_notification_period        24x7
      service_notification_options    u,c,r
      host_notification_options       d,r
      service_notification_commands   notify-by-email
      host_notification_commands      host-notify-by-email
      email                           helpdesk@domeen.ee
      }

define contactgroup{
      contactgroup_name       Helpdesk
      alias                   IT Helpdesk
      members                 helpdesk
      }

Apache seadistus

  <Directory /usr/local/www/nagios>
    Order deny,allow
    Deny from all
    Allow from 127.0.0.1
  </Directory>

  <Directory /usr/local/www/nagios/cgi-bin>
    Options ExecCGI
  </Directory>

  ScriptAlias /nagios/cgi-bin/ /usr/local/www/nagios/cgi-bin/
  Alias /nagios/ /usr/local/www/nagios/

Selline virtualhost toimib küll vaid bsd peal. Erinevates distrotes on rajad failideni teised. Üldiselt peale installi öeldakse kus kaustas nagios'i cgi veebiliides asub.

Konfime graafikud

Kasutame Nagios Grapherit tööks. Koduleht http://www.nagiosexchange.org/NagiosGrapher.84.0.html

Esimesena tõmbame selle alla.

http://www.nagiosexchange.org/42;195

tar -xf NagiosGrapher-1.6.1-rc2.tar.bz2
cd NagiosGrapher-1.6.1-rc2

lisame faili config.layout read

# default FreeBSD
<Layout freebsd>
 prefix:                               /usr/local/nagios
 nagios_config:                /usr/local/etc/nagios.cfg
 nagios_config_cgi:    /usr/local/etc/cgi.cfg
 nagios_images:                /usr/local/www/nagios/images
 nagios_images_logos:  /usr/local/www/nagios/images/logos
 nagios_folder_cgi: /usr/local/www/nagios/cgi-bin
 perl_inc:                             /usr/local/lib/perl5/5.8.8/
 nagios_contribution:  /usr/local/nagios_grapher/contrib
 ng_config:                    /usr/local/etc/nagios_ng
 ng_config_sub:                /usr/local/etc/nagios_ng/ngraph.d
 ng_daemon:                    /usr/local/nagios_grapher
 ng_srvext_file:               /usr/local/etc/nagios_ng/serviceextinfo.cfg
 ng_srvext_dir:                /usr/local/etc/nagios_ng/serviceext
 ng_interface_pipe:    /var/spool/nagios/rw/ngraph.pipe
 ng_logfile:                   /var/log/ngraph.log
 ng_rrd:                       /var/spool/nagios/rrd
</Layout>

ja kirjutame

autoconf
 ./configure --with-layout=freebsd
make testdeps

arvatavasti teatatakse puuduvast tarkusest niisiis kirjutame

make fixdeps
make install

ImageMagick ei installita vaid ainult cpanel asjad make fixdeps'iga nii peame

cd /usr/ports/graphics/ImageMagick
make install clean

ja rrdtool graafikuteks

cd /usr/ports/net/rrdtool
make install clean