monitor custom TCP port dalam nagios

Harini ada sorang kawan tanya cam mane nak monitor custom port di nagios. tujuan dia nak monitor custom port sebab ssh port dia dah di "listen" pada port lain ( port 2020). So caranya mudah je.

depend pada cara korang setup nagios, korang kene carik nagis commands.cfg file. mcm aku nyer terletak di /etc/nagis/commands.cfg . ( ade gak orang yg setup di /usr/local/nagios/etc/objects)

gunakan command berikut

vi /etc/commands.cfg

paste seperti di bawah :-

define command{
    command_name check_tcp_2020
    command_line $USER1$/check_tcp -h $HOSTADDRESS$ -p 2020 -4
}

pastu korang kene create service baru untuk host yang nak dimonitor.

vi /etc/nagios/hosts.cfg

kemudian paste bende ni

define host{
    use generic-host ;type generic server kalau linux guna linux-host
    host_name matahari ; nama server kawan aku
    alias server ssh   ; diskripsi server
    address 192,168,1,1 ; server IP
}

pastu paste bawah ni kat services.cfg

define service{
    use generic-service                        
    host_name matahari                          
    service_description 'check ssh port2020/tcp' 
    check_command check_tcp_2020                
}

Verify config betul ke idak

# nagios3 -v /etc/nagios3/nagios.cfg

mcm kawan aku dia kene guna cmd ni

# /usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg

pastu korang akan dapat cam ni

Nagios Core 3.2.3
Copyright (c) 2009-2010 Nagios Core Development Team and Community Contributors
Copyright (c) 1999-2009 Ethan Galstad
Last Modified: 10-03-2010
License: GPL

Website: http://www.nagios.org
Reading configuration data...
Read main config file okay...
Processing object config file '/usr/local/nagios/etc/objects/commands.cfg'...
Processing object config file '/usr/local/nagios/etc/objects/contacts.cfg'...
Processing object config file '/usr/local/nagios/etc/objects/timeperiods.cfg'...
Processing object config file '/usr/local/nagios/etc/objects/templates.cfg'...
Processing object config file '/usr/local/nagios/etc/objects/localhost.cfg'...
Processing object config file '/etc/nagios/hosts.cfg'...
Processing object config file '/etc/nagios/services.cfg'...
Read object config files okay...

Running pre-flight check on configuration data...

Checking services...
Checked 13 services.
Checking hosts...
Checked 4 hosts.
Checking host groups...
Checked 1 host groups.
Checking service groups...
Checked 0 service groups.
Checking contacts...
Checked 1 contacts.
Checking contact groups...
Checked 1 contact groups.
Checking service escalations...
Checked 0 service escalations.
Checking service dependencies...
Checked 0 service dependencies.
Checking host escalations...
Checked 0 host escalations.
Checking host dependencies...
Checked 0 host dependencies.
Checking commands...
Checked 26 commands.
Checking time periods...
Checked 5 time periods.
Checking for circular paths between hosts...
Checking for circular host and service dependencies...
Checking global event handlers...
Checking obsessive compulsive processor commands...
Checking misc settings...

Total Warnings: 0
Total Errors: 0

Kalau semua nya ok, boleh la restart nagios.

# /etc/init.d/nagios restart

settle.