Listing Kafka Topics

Listing Kafka Topics

Learn how to list all kafka topics using the command line. In this quick tutorial, we're going to see how we can list all topics in an Apache Kafka cluster. First, we'll set up a single-node Apache Kafka and Zookeeper cluster. Then, we'll ask that cluster about its topics.

1. Overview

In this quick tutorial, we're going to see how we can list all topics in an Apache Kafka cluster.

First, we'll set up a single-node Apache Kafka and Zookeeper cluster. Then, we'll ask that cluster about its topics.

2. Setting Up Kafka

Before listing all the topics in a Kafka cluster, let's set up a test single-node Kafka cluster in three steps:

  • Downloading Kafka and Zookeeper
  • Starting Zookeeper Service
  • Starting Kafka Service

First, we should make sure to download the right Kafka version from the Apache site. Once the download finishes, we should extract the downloaded archive:

$ tar xvf kafka_2.13-2.6.0.tgz

Kafka is using Apache Zookeeper to manage its cluster metadata, so we need a running Zookeeper cluster.

For test purposes, we can run a single-node Zookeeper instance using the script in the bin directory:

$ cd kafka_2.13-2.6.0 ## extracted directory$ ./bin/ config/

This will start a Zookeeper service listening on port 2181. After this, we can use another script to run the Kafka server:

$ ./bin/ config/

After a while, a Kafka broker will start. Let's add a few topics to this simple cluster:

$ bin/ --create --topic users.registrations --replication-factor 1 \  --partitions 2  --zookeeper localhost:2181$ bin/ --create --topic users.verfications --replication-factor 1 \  --partitions 2  --zookeeper localhost:2181

Now that everything is ready, let's see how we can list Kafka topics.

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