This directory should contain executable programs ending in ".script" to handle CTDB event notifications. The first and only argument passed to each program is the event, which is one of: init, setup, startup, unhealthy, healthy An example script that sends SNMP traps for unhealthy/healthy might look like this: #!/bin/sh case "$1" in unhealthy) # Send an SNMP trap saying that the node is unhealthy: snmptrap -m ALL -v 1 -c public 10.1.1.105 ctdb \ $(hostname) 0 0 $(date +"%s") ctdb.nodeHealth.0 i 1 ;; healthy) # Send an SNMP trap saying that the node is healthy again: snmptrap -m ALL -v 1 -c public 10.1.1.105 ctdb \ $(hostname) 0 0 $(date +"%s") ctdb.nodeHealth.0 i 0 ;; esac Alternatively, email could be sent: #!/bin/sh case "$1" in unhealthy) mail -s "$(hostname) is UNHEALTHY" foo@example.com /dev/null 2>&1 ;; healthy) mail -s "$(hostname) is HEALTHY" foo@example.com /dev/null 2>&1 ;; esac