Nagios : Notification Setting2016/06/08

	This is the Email Notification Settings section. It is enabled on some items by default but if you change it, configure like follows.
[1]	Install and start SMTP Server, refer to here.
[2]	Set notification recipients. And aldo Nagios sends notifications with mail command, so install it.

root@dlp:~#

vi /etc/nagios3/conf.d/contacts_nagios2.cfg

# line 26: set recipient email address

root@localhost

root@dlp:~#

systemctl restart nagios3

[3]

It's possible to change notification setting on Nagios admin site.
Login to it and click "Services", then services list is displayed. The icons which are displayed near a service name are just the one which notification is disabled. (HTTP and SSH corresponds to the example below) To enable notification on a service, click service name first.

[4]	Click "Enable notifications for this service".

[5]	Click "Commit" button.

[6]	It's OK to set the notification.

[7]	If notification is enabled and a service has some troubles, the notification like follows are sent to the recipients you set.

Subject: ** PROBLEM Service Alert: localhost/SSH is CRITICAL **
To: <root@localhost>
X-Mailer: mail (GNU Mailutils 2.99.99)
Message-Id: <20160609020011.5636A15FBBD@dlp.srv.world>
Date: Thu,  9 Jun 2016 11:00:11 +0900 (JST)
From: nagios@dlp.srv.world

***** Nagios *****

Notification Type: PROBLEM

Service: SSH
Host: localhost
Address: 127.0.0.1
State: CRITICAL

Date/Time: Thu Jun 9 11:00:11 JST 2016

Additional Info:

connect to address 127.0.0.1 and port 22: Connection refused

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