Bash script to install the most minimal Kafka

install-kafka-minimal.sh

#!/bin/bash

# this script installs and starts kafka 
# the most minimal installation of kafka possible 


KAFKA_URL=http://mirror.olnevhost.net/pub/apache/kafka/2.1.0/kafka_2.11-2.1.0.tgz


install_kafka() {
    cd /opt
    wget $KAFKA_URL
    tar xvzf kafka_* 
    mv kafka_2.11-2.1.0 kafka
}


start_kafka() {
    ZOOKEEPER_LOG=/var/log/zookeeper.log


    # start zookeeeper 
    bin/zookeeper-server-start.sh config/zookeeper.properties > $ZOOKEEPER_LOG 2>&1 &

    # wait for zookeeper to *actually* start before proceeding
    sudo tail -f $ZOOKEEPER_LOG | while read LOGLINE
    do
       [[ "${LOGLINE}" == *"INFO binding to port 0.0.0.0/0.0.0.0:2181"* ]] && pkill -P $$ tail
    done

    # now we can start kafka 
    bin/kafka-server-start.sh config/server.properties > /var/log/kafka.log 2>&1 
}

main() {
    install_kafka
    start_kafka
}

main "$@"