# Reference for Confluent for Kubernetes Confluent for Kubernetes (CFK) reference material includes the custom resource API, the `kubectl confluent` plugin commands, and Apache Kafka® terminology used throughout the documentation. ## In this section - [Confluent for Kubernetes API Reference](co-api.md#cfk-api): Look up the custom resource definition (CRD) fields and supported values for CFK. - [kubectl Plugin for Confluent for Kubernetes Reference](co-plugin-cli-index.md#co-plugin-cli-index): Look up the `kubectl confluent` plugin commands you can use to debug and diagnose your deployment. - [Glossary](_glossary.md): Look up Kafka and Confluent Platform terminology.