Can you explain the role and purpose of ZooKeeper in the architecture of Apache Kafka?

Apache ZooKeeper in Kafka architecture is used as a centralized service for managing configuration and coordinating distributed components. It stores metadata about the Kafka cluster, such as information about brokers, topics, partitions, and their leaders.

Main roles of ZooKeeper in Kafka:

• Broker Coordination: ZooKeeper monitors the state of brokers, helping to determine which brokers are active.
• Partition Leader Election: In case of broker failure, ZooKeeper helps elect a new leader for each partition.
• Metadata Storage: Information about topics, ACLs, and configurations is stored in ZooKeeper.

Thus, ZooKeeper ensures consistency and fault tolerance of the Kafka cluster, allowing brokers and clients to work with up-to-date information about the system's state.