This script either uses the 'notify' or snmp functionality of keepalived
to inform an administrator about the current state of keepalived masters and
slaves.

While the SNMP part is simply querying a SNMP server for the keepalived
part (via agentx), the 'notify' part needs some adaptions in the keepalived.conf
to:
* execute a script on changes during keepalived runtime, which writes
the state change into a temporary file
* read the file each time the monitoring server asks for the state if
there is a keepalived up and running