$ kafka-console-consumer.sh --bootstrap-server localhost:9092 --topic test --from-beginning --property print.partition=true --property print.key=true --property print.timestamp=true --property print.offset=true --property print.headers=true --property key.separator='|'

CreateTime:1592475472398|Partition:0|Offset:3|h1=v1,h2=v2|key1|value1    # NOTE: partition 0, offset 3
CreateTime:1592475472456|Partition:0|Offset:4|NO_HEADERS|key2|value2     # NOTE: partition 0, offset 4