Quickly install and get started with Kafka in Linux: a step-by-step guide

Detailed steps for installing Kafka in Linux environment

1. Prerequisites

• Operating system: Linux (Ubuntu is recommended or CentOS)
• Java: JDK 8 or higher
• ZooKeeper: version 3.4 or higher
• Kafka: latest stable version

2. Install Java

sudo apt-get update
sudo apt-get install default-jdk

3. Install ZooKeeper

wget https://archive.apache.org/dist/zookeeper/zookeeper-3.4.14/zookeeper-3.4.14.tar.gz
tar -xvf zookeeper-3.4.14.tar.gz
cd zookeeper-3.4.14
./configure
make
sudo make install

4. Configure ZooKeeper

sudo mkdir /var/lib/zookeeper
sudo chown zookeeper:zookeeper /var/lib/zookeeper

Edit/etc/zookeeper/conf/zoo.cfg file and add the following content:

dataDir=/var/lib/zookeeper
clientPort=2181

Start ZooKeeper:

sudo service zookeeper start

5. Install Kafka

wget https://archive.apache.org/dist/kafka/2.8.0/kafka_2.13-2.8.0.tgz
tar -xvf kafka_2.13-2.8.0.tgz
cd kafka_2.13-2.8.0

6. Configure Kafka

Edit the /etc/kafka/server.properties file and add the following content:

broker.id=0
listeners=PLAINTEXT://:9092
zookeeper.connect=localhost:2181

Start Kafka:

./bin/kafka-server-start.sh config/server.properties

7. Create topic

./bin/kafka-topics.sh --create --topic test --partitions 1 --replication-factor 1

8. Produce data

./bin/kafka-console-producer.sh --topic test

9. Consumption data

./bin/kafka-console-consumer.sh --topic test --from-beginning

Quick Start Guide

1. Create a Producer

import org.apache.kafka.clients.producer.KafkaProducer;
import org.apache.kafka.clients.producer.ProducerConfig;
import org.apache.kafka.clients.producer.ProducerRecord;

import java.util.Properties;

public class SimpleProducer {

    public static void main(String[] args) {
        Properties properties = new Properties();
        properties.put(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG, "localhost:9092");
        properties.put(ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG, "org.apache.kafka.common.serialization.StringSerializer");
        properties.put(ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG, "org.apache.kafka.common.serialization.StringSerializer");

        KafkaProducer<String, String> producer = new KafkaProducer<>(properties);

        ProducerRecord<String, String> record = new ProducerRecord<>("test", "Hello, Kafka!");

        producer.send(record);

        producer.close();
    }
}

2. Create a Consumer

import org.apache.kafka.clients.consumer.ConsumerConfig;
import org.apache.kafka.clients.consumer.ConsumerRecord;
import org.apache.kafka.clients.consumer.ConsumerRecords;
import org.apache.kafka.clients.consumer.KafkaConsumer;

import java.util.Arrays;
import java.util.Properties;

public class SimpleConsumer {

    public static void main(String[] args) {
        Properties properties = new Properties();
        properties.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, "localhost:9092");
        properties.put(ConsumerConfig.GROUP_ID_CONFIG, "test-group");
        properties.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, "org.apache.kafka.common.serialization.StringDeserializer");
        properties.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG, "org.apache.kafka.common.serialization.StringDeserializer");

        KafkaConsumer<String, String> consumer = new KafkaConsumer<>(properties);

        consumer.subscribe(Arrays.asList("test"));

        while (true) {
            ConsumerRecords<String, String> records = consumer.poll(100);

            for (ConsumerRecord<String, String> record : records) {
                System.out.println(record.key() + ": " + record.value());
            }
        }

        consumer.close();
    }
}

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