This article provides step by step instructions on how to install, setup, and run Apache Kafka Cluster on Ubuntu and test Producer and Consumer shell scripts that come with Kafka distribution also will see how to create and describe a topic.
- JDK 8 and above
Table of Contents:
- Install and Setup Kafka Cluster
- Start Zookeeper
- Start Kafka Broker
- Create Kafka Topic
- List all Topics
- Describe Topic
- Run Kafka Producer
- Run Kafka Consumer
Install and Setup Kafka Cluster
Download Apache kafka latest version
Once your download is complete, unzip the file’s contents using tar, a file archiving tool and rename the folder to spark
tar -xzf kafka_2.11-2.1.0.tgz mv kafka_2.11-2.1.0.tgz kafka
Set Kafka home location to PATH environment variable on .bashrc or .profile file.
Now load the environment variables to the opened session by running below command.
In case if you have added path to .profile file then restart your session by logging out and logging in again.
Note : All commands demonstrated below are executed from Kafka home directory.
ZooKeeper is a high-performance coordination service for distributed applications and Kafka uses ZooKeeper to store the metadata information of the cluster. Kafka comes with the Zookeeper built-in, all we need is to start the service with default configuration.
Start Kafka Broker
A Kafka cluster consists of one or more brokers(Kafka servers) and broker organizes messages to respective topics and persists all the Kafka messages in a topic log file for 7 days. Depends on your replication factor of the topic, the messages are replicated to multiple brokers.
Open another ubuntu session and start Kafka server with default configuration.
Create Kafka Topic
All Kafka messages are organized into topics and topics are partitioned and replicated across multiple brokers in a cluster. Producer sends messages to topic and consumer reads messages from topic. Replication factor defines how many copies of the message to be stored and Partitions allow you to parallelize a topic by splitting the data in a particular topic across multiple brokers.
Open another ubuntu session and create kafka topic “text_topic” with replication factor 1 and partitions 1
bin/kafka-topics.sh --create --zookeeper localhost:2181 \ --replication-factor 1 \ --partitions 1 \ --topic text_topic
List all Topics
Run below command to list all the the topics
bin/kafka-topics.sh --zookeeper localhost:2181 --list
Run below command to describe the topic. This returns topic partition and replication information.
bin/kafka-topics.sh --zookeeper localhost:2181 --describe
This command returns below output.
Run Kafka Producer
Run Kafka Producer shell that comes with kafka distribution
bin/kafka-console-producer.sh \ --broker-list localhost:9092 --topic text_topic First kafka example My Message
Run Kafka Consumer
Run Kafka Consumer shell that comes with Kafka distribution
bin/kafka-console-consumer.sh \ --bootstrap-server localhost:9092 --topic text_topic --from-beginning First kafka example My Message
You now have Apache Kafka running on your Ubuntu server. You can create Kafka producers and consumers using Kafka clients, which are available for most programming languages. Below next steps includes a URL to work with Scala programming language.
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