Managing Kafka Topics

Scenario

You can manage Kafka topics on a cluster client based on service requirements. Management permission is required for clusters with Kerberos authentication enabled.

Prerequisites

You have installed the Kafka client.

Procedure

1. Access the ZooKeeper instance page.

   log in to FusionInsight Manager. For details, see Accessing FusionInsight Manager. Choose Cluster > Name of the desired cluster > Services > ZooKeeper > Instance.

2. View the IP addresses of the ZooKeeper role instance.

   Record any IP address of the ZooKeeper instance.

3. Prepare the client based on service requirements. Log in to the node where the client is installed.

   Log in to the node where the client is installed. For details, see Installing a Client.

4. Run the following command to switch to the client directory, for example, /opt/client/Kafka/kafka/bin.

   cd /opt/client/Kafka/kafka/bin

5. Run the following command to configure environment variables:

   source /opt/client/bigdata_env

6. Run the following command to perform user authentication (skip this step in normal mode):

   kinit Component service user

7. Use kafka-topics.sh to manage Kafka topics.
   • Creating a topic:

     By default, partitions of a topic are distributed based on the number of partitions on the node and disk. To distribute partitions based on the disk capacity, set log.partition.strategy to capacity for the Kafka service.

     • ./kafka-topics.sh --create --topic topic name --partitions number of partitions occupied by the topic--replication-factor number of replicas of the topic--zookeeper IP address of any ZooKeeper node:clientPort/kafka
     • ./kafka-topics.sh --create --topic topic name --partitions number of partitions occupied by the topic--replication-factor number of replicas of the topic --bootstrap-server IP address of the Kafkacluster:21007 --command-config ../config/client.properties
   • List of topics:
     • ./kafka-topics.sh --list --zookeeper service IP address of any ZooKeeper node:clientPort/kafka
     • ./kafka-topics.sh --list --bootstrap-server IP address of the Kafkacluster:21007 --command-config ../config/client.properties
   • Viewing the topic:
     • ./kafka-topics.sh --describe --zookeeper service IP address of any ZooKeeper node:clientPort/kafka --topic topic name
     • ./kafka-topics.sh --describe --bootstrap-server IP address of the Kafkacluster:21007 --command-config ../config/client.properties --topic topic name
   • Modifying a topic:
     • ./kafka-topics.sh --alter --topic topic name--config configuration item=configuration value --zookeeper service IP address of any ZooKeeper node:clientPort/kafka
   • Expanding partitions:
     • ./kafka-topics.sh --alter --topic topic name --zookeeper service IP address of any ZooKeeper node:clientPort/kafka --command-config Kafka/kafka/config/client.properties --partitions number of partitions after the expansion
     • ./kafka-topics.sh --alter --topic topic name --bootstrap-server IP address of the Kafka cluster:21007 --command-config Kafka/kafka/config/client.properties --partitions number of partitions after the expansion
   • Deleting a topic
     • ./kafka-topics.sh --delete --topic topic name --zookeeper Service IP address of any ZooKeeper node:clientPort/kafka
     • ./kafka-topics.sh --delete --topic topic name--bootstrap-server IP address of the Kafka cluster:21007 --command-config ../config/client.properties