What components are included in the Apache Kafka cluster?

An Apache Kafka cluster consists of several key components:

• Brokers — servers that store and transmit messages.
• Topics — logical channels where messages are published.
• Partitions — subdivisions of topics for scaling and parallel processing.
• Producers — applications or services that send messages to topics.
• Consumers — applications that read messages from topics.
• ZooKeeper — a service for coordinating and managing the cluster's state (replaced by Kafka's own mechanism in newer versions).

These components together ensure high performance, fault tolerance, and scalability of the messaging system.