# Experimental Features This doc covers experimental features in Tekton Chains. Currently, experimental features include: - [PubSub Storage Backend Support](#Pubsub-Storage-Backend-Support) ## PubSub Storage Backend Support Support for PubSub storage backend was introduced in chains. The first PubSub provider implementation is Kafka, and more may follow in the future. ### Kafka To enable the Kafka backend run: ```shell kubectl patch configmap chains-config -n tekton-chains -p='{"data": {storage.pubsub.provider": "kafka","storage.pubsub.topic": "chains", "storage.pubsub.kafka.bootstrap.servers":"kafka-0.kafka-headless.default.svc.cluster.local:9092"}}' ``` Note that the `storage.pubsub.kafka.bootstrap.servers` value needs to be adjusted to point to the list of [bootstrap servers] your cluster is connected to. [bootstrap servers]: https://kafka.apache.org/documentation/#producerconfigs_bootstrap.servers