simple HTML email alert Template for Icinga 2 to replace the default boring text based email alert.

Update: I have replaced mail command with mutt due to incompatibility of options among different linux distributions. Also I have added new color highlight feature for different states (ok=green,warning=orange and critical=red).

Take backup of existing files in /etc/icinga2/scripts and copy this new scripts to it

Edit the "Variables for HTML Template" section in mail-service-notification.sh

SUBJECT="$SERVICEDISPLAYNAME $SERVICESTATE! - $HOSTDISPLAYNAME"
TITLE="Icinga Server Monitoring"
ICINGAWEBURL="http://YOUR-IP:PORT/icingaweb2/dashboard#!/icingaweb2/monitoring/service/history?host=$HOSTDISPLAYNAME&service=$SERVICENAME"
FROMNAME="Icinga Alerts"
FROMEMAIL="[email protected]" 

Edit the "Variables for HTML Template" section in mail-host-notification.sh

SUBJECT="[ $HOSTSTATE ] - $HOSTDISPLAYNAME is $HOSTSTATE"
TITLE="Icinga Server Monitoring"
ICINGAWEBURL="http://YOUR-IP:PORT/icingaweb2/dashboard#!/icingaweb2/monitoring/host/history?host=$HOSTDISPLAYNAME"
FROMNAME="Icinga Alerts"
FROMEMAIL="[email protected]" 

Complete Tutorial : https://shyamjos.com/icinga2-html-template/