This talk is (1) a basic tour of CloudEvents and (2) an overview of how it's currently used to power events in Knative (the most well known system to adopt CloudEvents) but also more interestingly (3) a practical example of using the CloudEvents SDKs to stitch together multiple event sources and sinks—some combination of Kafka, Pulsar, Kinesis, Pub/Sub, and Event Grid—into a coherent event-based architecture.