Question 1

How to install kcat on Ubuntu?

Accepted Answer

On Ubuntu, use 'sudo apt-get install kafkacat' since it's packaged under the old name. For the latest version, you might need to add repositories or build from source, which involves installing dependencies like librdkafka-dev.

Question 2

kcat vs kafka-console-producer: which is better for scripting?

Accepted Answer

kcat is generally faster and lighter due to being non-JVM based, making it more suitable for scripting and automation. kafka-console-producer is part of the official Kafka suite and might be preferred in Java-centric environments for consistency.

Question 3

How to decode Avro messages with kcat?

Accepted Answer

Use the -s avro flag along with -r to specify the Schema Registry URL, e.g., 'kcat -b broker -t topic -s avro -r http://schema-registry:8080'. This deserializes Avro messages to JSON output, as demonstrated in the README examples.

Question 4

Can kcat handle SSL and SASL authentication?

Accepted Answer

Yes, kcat supports SSL and SASL authentication by passing configuration properties with -X, such as '-X security.protocol=SASL_SSL -X sasl.mechanism=PLAIN' along with credentials, enabling secure connections to Kafka clusters.

Question 5

What is the mock cluster feature in kcat?

Accepted Answer

kcat can spin up an in-memory mock Kafka cluster using the -M flag, useful for quick testing and performance evaluation without a real Kafka setup. It supports basic producer, consumer, and group operations, but lacks persistence.

Question 6

Is kcat suitable for production monitoring?

Accepted Answer

kcat is great for ad-hoc debugging and scripting in production, but for continuous monitoring, dedicated tools like Kafka Manager or Confluent Control Center offer more features like alerts, dashboards, and long-term metrics storage.

kcat (.7k)

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