Trigger functions from Kafka
You can install the Kafka connector using its helm chart, or by using arkade.
Installation with Helm
Once you have configured a number of topics, you can then annotate your functions so that they get triggered by any incoming messages on those topics.
Now add an annotation for the topic, so that the function is invoked for any message received:
Blog post / walk-through: Staying on topic: trigger your OpenFaaS functions with Apache Kafka