Kafka: KRaft replaced ZooKeeper

From Kafka 3.3 KRaft is production-ready and from 4.0 ZooKeeper is gone entirely.

Code

# KRaft: brokers elect a controller among themselves
process.roles=broker,controller
controller.quorum.voters=1@kafka1:9093,2@kafka2:9093,3@kafka3:9093

# No zookeeper.connect at all

Output

One system to run instead of two,
faster failover, and metadata that scales to millions of partitions.

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Published 2026-08-11