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This directory should contain executable programs 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
To use notifications with this directory then you need to set:
CTDB_NOTIFY_SCRIPT=/etc/ctdb/notify.sh
in your CTDB configuration file.
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 >/dev/null 2>&1
;;
healthy)
mail -s "$(hostname) is HEALTHY" foo@example.com </dev/null >/dev/null 2>&1
;;
esac
When adding programs please note the exclusion patterns in notify.sh.
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