3.5.1 Matrix Server Administration Guide

Configure Notifiers

If you would like certain actions to take place when matrix events occur,

you can configure notifiers that define how the events should be handled.

Overview

Matrix Server uses notifiers to enable you to view event information

generated by servers, network interfaces, virtual hosts, service monitors,

device monitors, and filesystems. Notifiers send events from these

entities to user-defined notifier scripts. The events are categorized as State

Transitions, Errors, Warnings, and Informational messages.

One server in a matrix holds the responsibility to forward a global event

message to notifier scripts. The global events are generally state transition

events. Some events such as errors, warnings, and informational

messages from service monitors are reported only locally on a server.

Any local event will be forwarded to notifier scripts that have subscribed

to the event and entity combination on the server.

We recommend that you configure notifier scripts on each server in the

matrix because the server responsible for handling global events may

change in the normal course of ClusterPulse daemon processing. Only

one notifier event message is delivered for each invocation of a notifier

script. If multiple notifiers subscribe to the same combination of event

and entity, then when an event is triggered, each notifier script is given a

copy of the event message.

When adding a notifier, you will need to specify a name for the notifier

and to supply the script to be run when an event is triggered that matches