$ make build
$ make image
$ kafka_test_tool -help
Usage of kafka_test_tool:
-kafka-bootstrap string
Kafka bootstrap servers (default "localhost:9092")
-listen-address string
Listen address. (default ":8080")
-log-level string
Log level: trace|debug|info|warn|error|none (default "info")
$ curl -X POST localhost:8080/topics/some-topic 'some message'