Deleting a Kafka Topic

Notes and Constraints

• Deleting a topic clears the topic data permanently.
• For an instance with ciphertext access enabled, if allow.everyone.if.no.acl.found is set to false, the topic can be deleted on the client only by the initial user (set in instance creation).

Prerequisite

The instance is in the Running state.

Deleting a Kafka Topic (Console)

1. Log in to the console.
2. Click in the upper left corner to select the region where your instance is located.
3. Click in the upper left corner and choose Application > Distributed Message Service for Kafka to open the Kafka instance list.
4. Click the desired instance to go to the instance details page.
5. In the navigation pane, choose Instance > Topics.
6. Delete topics using either of the following methods:
   • Select one or more topics and click Delete Topic in the upper left corner.
   • In the row containing the topic you want to delete, choose More > Delete.
   • Click the name of the topic to be deleted. The topic details page is displayed. In the upper right corner, choose Delete.

7. In the Delete Topic dialog box, click OK.

   The topic is deleted if it is not displayed in the topic list.

Deleting a Kafka Topic on the Client

If your Kafka client version is later than 2.2, you can use kafka-topics.sh to delete topics.

• For a Kafka instance with ciphertext access disabled, run the following command in the /bin directory of the Kafka client:

  ./kafka-topics.sh --bootstrap-server {connection-address} --delete --topic {topic-name}

  Table 1 Topic deletion parameters

  Parameter	Description
  connection-address	Connection address of a Kafka instance. To obtain the address, choose Overview > Connection.
  topic-name	Topic name.

  Example:

  [root@ecs-kafka bin]# ./kafka-topics.sh --bootstrap-server 192.168.xx.xx:9092,192.168.xx.xx:9092,192.168.xx.xx:9092 --delete --topic topic-01
  [root@ecs-kafka bin]#

• For a Kafka instance with ciphertext access enabled, do as follows:
  1. (Optional) If the SSL certificate has been configured, skip this step and go to 2. Otherwise, do as follows:

     Create the ssl-user-config.properties file in the /config directory of the Kafka client and add the SSL certificate configurations by referring to 3.

  2. Run the following command in the /bin directory of the Kafka client:

     ./kafka-topics.sh --bootstrap-server {connection-address} --delete --topic {topic-name} --command-config ../config/{ssl-user-config.properties}

     Table 2 Topic deletion parameters

     Parameter	Description
     connection-address	Connection address of a Kafka instance. To obtain the address, choose Overview > Connection.
     topic-name	Topic name.
     ssl-user-config.properties	Configuration file name. This file contains username, password, and SSL certificate information.

     Example:

     [root@ecs-kafka bin]# ./kafka-topics.sh --bootstrap-server 192.168.xx.xx:9093,192.168.xx.xx:9093,192.168.xx.xx:9093 --delete --topic topic-01 --command-config ../config/ssl-user-config.properties
     [root@ecs-kafka bin]#