Open $KAFKA_HOME/config/zookeeper.properties file and change daraDir to $KAFKA_HOME/kafka-store/zookeeper.
You can find the property details in the ZooKeeper administrator's guide on Apache ZooKeeper web site.
Create zookeeper directory, under $KAFKA_HOME/kafka-store.
Create myid file in $KAFKA_HOME/kafka-store/zookeeper directory.
The myid file must contain unique zookeeper id and it must match with x in server.x mentioned for external Kafka entry in $KAFKA_HOME/config/zookeeper.properties.
Example: If server.3 is mentioned, 3 becomes the zookeeper ID for myid file.
The following are the Kakfa server configuration properties, highlighted in bold text, that gets updated after above configurations: