Notifications ------------- The Bare Metal service supports the emission of notifications, which are messages sent on a message broker (like RabbitMQ or anything else supported by the `oslo messaging library `_) that indicate various events which occur, such as when a node changes power states. These can be consumed by an external service reading from the message bus. For example, `Searchlight `_ is an OpenStack service that uses notifications to index (and make searchable) resources from the Bare Metal service. Notifications are disabled by default. For a complete list of available notifications and instructions for how to enable them, see the `deploy guide `_.