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Telemetry Alarming service overview
The Telemetry Alarming services trigger alarms when the collected metering or event data break the defined rules.
The Telemetry Alarming service consists of the following components:
- An API server (
aodh-api) -
Runs on one or more central management servers to provide access to the alarm information stored in the data store.
- An alarm evaluator (
aodh-evaluator) -
Runs on one or more central management servers to determine when alarms fire due to the associated statistic trend crossing a threshold over a sliding time window.
- A notification listener (
aodh-listener) -
Runs on a central management server and determines when to fire alarms. The alarms are generated based on defined rules against events, which are captured by the Telemetry Data Collection service's notification agents.
- An alarm notifier (
aodh-notifier) -
Runs on one or more central management servers to allow alarms to be set based on the threshold evaluation for a collection of samples.
These services communicate by using the OpenStack messaging bus.