View source for Cambiare l'indirizzo email del mittente degli alert di Nagios

* Assicurarsi di aver installato 
 sudo apt-get install heirloom-mailx

* Verificare che sia impostato come default:
 sudo update-alternatives --set mailx /usr/bin/heirloom-mailx

* Testare inviando una mail a se stessi. Dovrà avere mittente nagios@example.com e destinatario user@example.com:
 echo TEST | mail -s test  -r nagios@example.com user@example.com

* Impostare l'indirizzo mail del mittente delle notifiche:
 sudoedit /etc/nagios3/nagios.cfg 

 admin_email=nagios@example.com
 
* Impostare i comandi di notifica nagios utilizzando il flag '''-r''' e l'indirizzo '''$ADMINEMAIL$''':

 sudoedit /etc/nagios3/conf.d/commands.cfg 

<pre>
# 'notify-host-by-email' command definition
define command{
    command_name    notify-host-by-email
    command_line    /usr/bin/printf "%b" "\nType:\t$NOTIFICATIONTYPE$\nHost:\t$HOSTNAME$\nState:\t$HOSTSTATE$\nAddr:\t$HOSTADDRESS$\nInfo:\t$HOSTOUTPUT$\nTime:\t$LONGDATETIME$\nNote:\t$NOTIFICATIONCOMMENT$" | /usr/bin/mail -r $ADMINEMAIL$ -s "$HOSTGROUPALIAS$ $HOSTNAME$ $HOSTSTATE$" $CONTACTEMAIL$
}

# 'notify-service-by-email' command definition
define command{
    command_name    notify-service-by-email
    command_line    /usr/bin/printf "%b" "Type:\t$NOTIFICATIONTYPE$\nServ:\t$SERVICEDESC$\nHost:\t$HOSTNAME$\nAddr:\t$HOSTADDRESS$\nState:\t$SERVICESTATE$\nTime:\t$LONGDATETIME$\nInfo:\t$SERVICEOUTPUT$\nURL:\t$SERVICENOTESURL$\nNote:\t$NOTIFICATIONCOMMENT$" | /usr/bin/mail -r $ADMINEMAIL$  -s "$HOSTGROUPALIAS$ $HOSTNAME$/$SERVICEDESC$ $SERVICESTATE$" $CONTACTEMAIL$ 
}
</pre>

* Riavviare nagios:
 sudo -u nagios /usr/sbin/nagios3 -v /etc/nagios3/nagios.cfg && sudo systemctl restart nagios3.service && sudo systemctl status  nagios3.service -l

* Inviare una notifica custom e e veirficare

=Riferimenti=
*[http://serverfault.com/questions/73004/defining-the-email-address-which-nagios-sends-emails-from Defining the email address which Nagios sends emails from - Server Fault]

*[http://mymcp.blogspot.it/2011/09/changing-from-e-mail-address-in-nagios.html My MCP: Changing the from e-mail address in Nagios]