Raspberry Pi Apache Kafka Cluster [P013]

Raspberry Pi Apache Kafka Cluster [P013]

 

https://www.youtube.com/watch?v=dAVwsc1Zhfo

  

* Parts

- Raspberry Pi 3 B Model (RASPBERRY-PI-3-B) [B088] x 3ea

- USB Power Supply

- Ethernet Hub

 

* Contents

- Installation & Setup

1. JDK

$ sudo apt-get install openjdk-8-jdk 

2. Kafka

$ cd 

$ mkdir kafka

$ wget http://apache.tt.co.kr/kafka/0.10.1.0/kafka_2.11-0.10.1.0.tgz

$ tar zxvf kafka_2.11-0.10.1.0.tgz

3. hosts

$ vi /etc/hosts

192.168.0.11 kafka-pi-01 

192.168.0.12 kafka-pi-02 

192.168.0.13 kafka-pi-03 

4. Config Zookeeper 

$ vi config/zookeeper.properties (added)

initLimit=5 

syncLimit=2 

server.1=kafka-pi-01:2888:3888 

server.2=kafka-pi-02:2888:3888 

server.3=kafka-pi-03:2888:3888

$ mkdir /tmp/zookeeper (each server)

$ echo 1 > /tmp/zookeeper/myid 

$ echo 2 > /tmp/zookeeper/myid 

$ echo 3 > /tmp/zookeeper/myid 

5. Config Kafka

$ vi config/server.properties (each server 1,2,3)

broker.id=1 

zookeeper.connect=kafka-pi-01:2181,kafka-pi-02:2181,kafka-pi-03:2181

* Demo Test Script

1. Zookeeper Cluster Start

/home/dragon/kafka/kafka/bin/zookeeper-server-start.sh -daemon /home/dragon/kafka/kafka/config/zookeeper.properties

2. Kafka Cluster Start

/home/dragon/kafka/kafka/bin/kafka-server-start.sh -daemon /home/dragon/kafka/kafka/config/server.properties

3. Create topics

/home/dragon/kafka/kafka/bin/kafka-topics.sh --create --zookeeper kafka-pi-01:2181 --replication-factor 3 --partitions 5 -topic rdtest

4. Producer 

/home/dragon/kafka/kafka/bin/kafka-console-producer.sh --broker-list kafka-pi-01:9092 --topic rdtest

5. Consumer

/home/dragon/kafka/kafka/bin/kafka-console-consumer.sh --zookeeper kafka-pi-01:2181 --topic rdtest --from-beginning

6. Start KafkaOffsetMonitor

java -cp KafkaOffsetMonitor-assembly-0.2.1.jar \

com.quantifind.kafka.offsetapp.OffsetGetterWeb \

--zk kafka-pi-01:2181,kafka-pi-02:2181,kafka-pi-03:2181 \

--port 8080 \

--refresh 10.seconds \

--retain 2.days &

7. Monitor Kafka 

http://192.168.0.11:8080

8. How to solve the "map failed" problem in the 32bit raspberry pi.

- edit kafka-run-class.sh 

- replace the KAFKA_JVM_PERFORMANCE_OPTS as follows

# JVM performance options

if [ -z "$KAFKA_JVM_PERFORMANCE_OPTS" ]; then

  #KAFKA_JVM_PERFORMANCE_OPTS="-server -XX:+UseParNewGC -XX:+UseConcMarkSweepGC -XX:+CMSClassUnloadingEnabled -XX:+CMSScavengeBeforeRemark -XX:+DisableExplicitGC -Djava.awt.headless=true"

  KAFKA_JVM_PERFORMANCE_OPTS="-server -XX:+UseG1GC -XX:MaxGCPauseMillis=20 -XX:InitiatingHeapOccupancyPercent=35 -XX:+DisableExplicitGC -Djava.awt.headless=true"

fi

- add KAFKA_HEAP_OPTS under 1G

export KAFKA_HEAP_OPTS="-Xmx256M -Xms128M"