If you add a marker to the source, you must create a rule that listens to the marker topic and send you an alert when the rule matches a configured marker condition.
Configure a source to include a marker. Add a unique marker ID for the source in the configuration screen when you create a source.
Create a rule for a source, which listens to the topic to which the source produces events.
Create a rule for the marker which listens to the system markers.
For information on a sample marker rule, see
Marker Rules.
Deploy the marker sources, rules that listen to the source topic, the marker rule that listens to the system_markers topic, and responders to the corresponding application services.
When the events match the rule condition, you get an alert that contains information about the event.