Zero-Downtime Kafka Upgrade: From 3.7.0 to 3.9.0 with Docker

A comprehensive guide to upgrading a 3-node Kafka cluster from version 3.7.0 to 3.9.0 using a two-phase rolling upgrade strategy, with step-by-step commands and real terminal outputs

December 24, 2025 · 15 min · 3177 words · Saliha