How to Deploy Apache Kafka as a Self-Hosted Alternative to Amazon Data Firehose

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A technical guide published on DEV Community outlines how to replace Amazon Data Firehose with a self-hosted Apache Kafka stack managed by the Strimzi Kubernetes operator. The setup uses Kafka running in KRaft mode, eliminating the need for ZooKeeper, alongside Kafka Connect configured with S3-compatible, Elasticsearch, and JDBC sink connectors. Security is handled through SASL/SCRAM and TLS encryption, while observability is provided via Prometheus and Grafana using Strimzi's built-in exporters. The deployment requires a Kubernetes cluster with at least three worker nodes, kubectl, Helm 3, and an S3-compatible storage bucket. The guide also covers Single Message Transforms, buffering configuration, and steps for migrating existing workloads off Amazon Data Firehose.

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