tldr/pages/common/kafkacat.md

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kafkacat

Apache Kafka producer and consumer tool.

  • Consume messages starting with the newest offset:

kafkacat -C -t {{topic}} -b {{brokers}}

  • Consume messages starting with the oldest offset and exit after the last message is received:

kafkacat -C -t {{topic}} -b {{brokers}} -o beginning -e

  • Consume messages as a Kafka consumer group:

kafkacat -G {{group_id}} {{topic}} -b {{brokers}}

  • Publish message by reading from stdin:

echo {{message}} | kafkacat -P -t {{topic}} -b {{brokers}}

  • Publish messages by reading from a file:

kafkacat -P -t {{topic}} -b {{brokers}} {{path/to/file}}

  • List metadata for all topics and brokers:

kafkacat -L -b {{brokers}}

  • List metadata for a specific topic:

kafkacat -L -t {{topic}} -b {{brokers}}

  • Get offset for a topic/partition for a specific point in time:

kafkacat -Q -t {{topic}:{{partition}}:{{unix_timestamp}} -b {{brokers}}