Konfigurasi Nagios
Nagios adalah tool network
monitoring system open source yang terbaik. Nagios bersifat modular, mudah
digunakan, dan memiliki skalablitas tinggi. Modul atau plugin pada nagios
sangat simple Anda pun dapat membuatnya guna melengkapi system checking pada
nagios sesuai dengan kebutuhan Anda. Untuk mendownload source nagios klik url
ini http://www.nagios.org/download/
Nagios awalnya didesain untuk berjalan pada sistem operasi Linux, namun dapat
juga berjalan dengan baik hampir disemua sistem operasi unix like.
Instalasi Nagios
Sebelum melakukan instalasi
pastikan bahwa apache2 telah terinstal dengan benar pada PC anda.
# apt-get install nagios3
Setelah kita masukkan User Name dan Password, barulah
kita masuk ke web Nagios tersebut.
Gambar diatas merupakan tampilan dari web nagios. dan
bila muncul tampilan seperti gambar diatas maka proses instalasi dari nagios
berhasil.
Menambah Host Yang Akan Di Monitoring
Menambah host yang akan dimonitoring
- Duplikat file localhost_nagios2.cfg dengan cara
"cp /etc/nagios3/conf.d/localhost_nagios2.cfg
/etc/nagios3/conf.d/thetarget.cfg"
- Kemudian buka file duplikat tadi dan edit menjadi seperti berikut:
"nano /etc/nagios3/conf.d/heru.cfg"
# A simple configuration file for
monitoring the local host
# This can serve as an example
for configuring other servers;
# Custom services specific to
this host are added here, but services
# defined in
nagios2-common_services.cfg may also apply.
#
define host{
use generic-host ; Name of host
template to use
host_name jartel1
alias PJ
address 172.16.40.62 <== ip host yang akan dimonitoring
}
define host{
use generic-host ; Name of host
template to use
host_name jartel2
alias Ega
address 172.16.30.14 <== ip host yang dimonitoring
}
define host{
use generic-host ; Name of host
template to use
host_name jartel3
alias Benny
address 172.16.30.28 <== ip host yang dimonitoring
}
# Define a service to check the
disk space of the root partition
# on the local machine. Warning
if < 20% free, critical if
# < 10% free space on partition.
define service{
use generic-service ; Name of
service template to use
host_name jartel1
service_description Disk Space
check_command
check_all_disks!20%!10%
}
define service{
use generic-service ; Name of
service template to use
host_name jartel2
service_description Disk Space
check_command check_all_disks!20%!10%
}
define service{
use generic-service ; Name of
service template to use
host_name jartel3
service_description Disk Space
check_command
check_all_disks!20%!10%
}
# Define a service to check the
number of currently logged in
# users on the local machine.
Warning if > 20 users, critical
# if > 50 users.
define service{
use generic-service ; Name of
service template to use
host_name jartel1
service_description Current Users
check_command check_users!20!50
}
define service{
use generic-service ; Name of
service template to use
host_name jartel2
service_description Current Users
check_command check_users!20!50
}
define service{
use generic-service ; Name of
service template to use
host_name jartel3
service_description Current Users
check_command check_users!20!50
}
# Define a service to check the
number of currently running procs
# on the local machine. Warning
if > 250 processes, critical if
# > 400 processes.
define service{
use generic-service ; Name of
service template to use
host_name jartel1
service_description Total
Processes
check_command check_procs!250!400
}
define service{
use generic-service ; Name of
service template to use
host_name jartel2
service_description Total Processes
check_command check_procs!250!400
}
define service{
use generic-service ; Name of
service template to use
host_name jartel3
service_description Total
Processes
check_command check_procs!250!400
}
# Define a service to check the
load on the local machine.
define service{
use generic-service ; Name of
service template to use
host_name jartel1
service_description Current Load
check_command
check_load!5.0!4.0!3.0!10.0!6.0!4.0
}
define service{
use generic-service ; Name of
service template to use
host_name jartel2
service_description Current Load
check_command
check_load!5.0!4.0!3.0!10.0!6.0!4.0
}
define service{
use generic-service ; Name of
service template to use
host_name jartel3
service_description Current Load
check_command
check_load!5.0!4.0!3.0!10.0!6.0!4.0
}- tambahkan service ping pada services_nagios2
"nano /etc/nagios3/conf.d/services_nagios2.cfg"
# check that web services are
running
define service {
hostgroup_name http-servers
service_description HTTP
check_command check_http
use generic-service
notification_interval 0 ; set
> 0 if you want to be renotified
}
# check that ssh services are
running
define service {
hostgroup_name ssh-servers
service_description SSH
check_command check_ssh
use generic-service
notification_interval 0 ; set
> 0 if you want to be renotified
}
define service {
hostgroup_name ping
service_description ping
check_command check_ping
use generic-service
notification_interval 0 ; set > 0 if you want to be
renotified
- pada bagian hostgroup_nagios2.cfg, tambahkan hostname yang telah kita buat tadi pada bagian member, sehingga menjadi members jartel1, jartel2, jartel3. Disini penulis menambah 3 member, yaitu jartel1, jartel2, jartel3. Dimana:
Jartel1 (Pj) :
172.16.40.62
Jartel2 (Ega) :
172.16.30.14
Jartel3 (Benny) : 172.16.30.28
- restart nagois
"/etc/init.d/nagois3 restart"
- Buka web browser kemudian ketik
"localhost/nagios3", maka host-host yang dimonitoring akan terlihat.
