11. PENGERTIAN NAGIOS
Nagios merupakan suatu host dan service yang di design untuk memonitoring keadaan suatu jaringan atau bisa memonitoring masalah-masalah pada suatu host tertentu yang ingin kita monitoring. Nagios mengawasi host-host dan servis yang telah ditetapkan, memberi peringatan jika keadaan memburuk, dan memberi tahu kapan keadaan tersebut membaik.
22. KONFIGURASI NAGIOS
berikut ini langkah-langkah konfigurasi nya :
2.1.Lakukan install nagios3
Dengan perintah : # apt-get install nagios3
Lakukan install apache2
Dengan perintah : # apt-get install apache2
2.2. Konfigurasi selanjutnya :
Dengan perintah : nano /etc/nagios3/conf.d/localhost_nagios2.cfg
2.2.1 Tambahkan pada define host tetangga dibawah define host local host.
2.2.2 Edit host name, alias dan address-nya sesuai dengan nama dan IP tetangga.
2.3.Langkah konfigurasi selanjutnya
Dengan perintah : nano /etc/nagios3/conf.d/korban.cfg
2.3.1. tambahkan define hostgroup untuk ping
2.3.2. Edit coding sesuai dengan nama host-host tetangga (yang kita monitoring) seperti dibawah :
# 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 dedi
address 172.16.30.44 (ip host yang akan dimonitoring)
}
define host{
use generic-host ; Name of host template to use
host_name jartel2
alias ezi
address 172.16.30.26 ( ip host yang dimonitoring )
}
define host{
use generic-host ; Name of host template to use
host_name jartel3
alias syuhada
address 172.16.40.62 ( 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
}
2.4.Langkah konfigurasi selanjutnya
Dengan perintah : nano /etc/nagios3/conf.d/services_nagios2.cfg
2.4.1. tambahkan define service untuk ping
2.4.2. pada hostgroup-name dan service description adalah
ping check_command :
# 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
2.5.Restart kembali nagios3
Dengan perintah : /etc/init.d/nagios3 restart
2.6.Jalankan di browser
Dengan perintah : http://localhost/nagios3
Name: nagiosadmin
Pass : jartel
2.6.1. Setelah masuk ke Nagiosnya akan muncul tab laman seperti gambar dibawah ini.
2.6.2. Gambar laman keluaran awal Nagios3 Setelah login Username dan Password yang sesuai
