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Helios Event Senders

There is support to send events on Helios cluster updates.

From helios masters, the following events are sent:

Topic HeliosDeploymentGroupEvents with a DeploymentGroupEvent message, see com.spotify.helios.rollingupdate.DeploymentGroupEventFactory.

From helios agents:

Topic HeliosTaskStatusEvents with a HeliosTaskStatusEvent message, see com.spotify.helios.common.descriptors.TaskStatusEvent.

There is support to send events over Kafka, and over Google PubSub.

Kafka

Using the command line argument --kafka <broker>, Kafka publishing is enabled. The Kafka sender creates a KafkaRecord from the topic and message as is.

GooglePubSub

Using the command line argument --pubsub-topic-prefix <topic-prefix>, Google PubSub publishing is enabled. The Google PubSub sender concatenates the topic prefix with the the helios event topic (with no separator), and sends the message as payload.